subject:(Gecko)

University of Guelph

1. Payne, Samantha Louise. Angiogenesis During Multi-tissue Regeneration Following Tail Loss in the Leopard Gecko (Eublepharis macularius).

Degree: MS, Department of Biomedical Sciences, 2012, University of Guelph

URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3900

► Angiogenesis, the formation of new blood vessels from pre-existing vasculature, is important in post-injury scar formation but its role in scar-free regeneration remains relatively unexplored.… (more)

Subjects/Keywords: Angiogenesis; Regeneration; Gecko; Vasculature

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Payne, S. L. (2012). Angiogenesis During Multi-tissue Regeneration Following Tail Loss in the Leopard Gecko (Eublepharis macularius). (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3900

Chicago Manual of Style (16^th Edition):

Payne, Samantha Louise. “Angiogenesis During Multi-tissue Regeneration Following Tail Loss in the Leopard Gecko (Eublepharis macularius).” 2012. Masters Thesis, University of Guelph. Accessed January 19, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3900.

MLA Handbook (7^th Edition):

Payne, Samantha Louise. “Angiogenesis During Multi-tissue Regeneration Following Tail Loss in the Leopard Gecko (Eublepharis macularius).” 2012. Web. 19 Jan 2021.

Vancouver:

Payne SL. Angiogenesis During Multi-tissue Regeneration Following Tail Loss in the Leopard Gecko (Eublepharis macularius). [Internet] [Masters thesis]. University of Guelph; 2012. [cited 2021 Jan 19]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3900.

Council of Science Editors:

Payne SL. Angiogenesis During Multi-tissue Regeneration Following Tail Loss in the Leopard Gecko (Eublepharis macularius). [Masters Thesis]. University of Guelph; 2012. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3900

University of Adelaide

2. Blacker, Helen Anna. Functional characteristics and molecular regulation of lymphangiogenesis during gecko tail regeneration: evidence for the roles of VEGF-C, VEGF-D and the receptor VEGFR-3.

Degree: 2011, University of Adelaide

URL: http://hdl.handle.net/2440/74098

► The Australian marbled gecko, Christinus marmoratus has the ability to voluntarily shed its tail (autotomy) and subsequently regenerate the lost tail. The lymphatic vessels of… (more)

▼ The Australian marbled gecko, Christinus marmoratus has the ability to voluntarily shed its tail (autotomy) and subsequently regenerate the lost tail. The lymphatic vessels of the gecko tail are severed during autotomy and yet the regenerated tail is not lymphoedematous, indicating that the mechanisms for interstitial fluid drainage are maintained, presumably by the growth of new lymphatic vessels(lymphangiogenesis). In contrast, disruption to the lymphatic system in humans can readily result in lymphoedema due to inadequate lymphatic regenerative capacity. Hence, the regenerating gecko tail offers an excellent model to study the process of and fundamental molecular mechanisms behind lymphatic regeneration. Here, I examine lymphangiogenesis within regenerating gecko tails. I hypothesise that physiological function of lymphatic vasculature is recovered by tail regeneration. Further, I hypothesise that lymphatic regeneration is, in part, regulated by vascular endothelial growth factor C (VEGF-C) and VEGF-D via binding to their receptor, VEGFR-3, a key lymphangiogenic pathway in mammals. Lymphatic uptake and transport, of different sized radiolabelled tracers, were examined using lymphoscintigraphy. Basic lymphatic function is apparent at 6 weeks of regeneration, however lymph clearance and velocity are not restored to near original levels until 12 weeks of regeneration. Differential clearance and lymph velocity between tracers are likely influenced by changes in the cellular matrix and lymphatic vessel permeability. Molecular control of lymphangiogenesis within regenerating gecko tails was studied by identifying and characterising VEGF-C, VEGF-D and VEGFR-3 in gecko tail tissue extracts. This is the first study to demonstrate the presence of these genes within any reptile. Sequence alignments and molecular modelling highlight conservation of many lymphangiogenic functional residues within the gecko proteins at both a sequence and structural level. Real time PCR established differential expression profiles of VEGF-C, VEGF-D and VEGFR-3 mRNA throughout tail regeneration, with up-regulation during the early, late and mid-phases of regeneration, respectively. These data are consistent with mammalian studies in wound healing and suggest differing roles during gecko tail regeneration and potentially the lymphangiogenic process following autotomy. Sites of expression of VEGF-C and VEGF-D in regenerating gecko tails, demonstrated by immunohistochemistry, include keratinocytes and fibroblasts. Positive staining lining blood and lymphatic-like vessels is demonstrated for VEGF-D and VEGF-C, respectively indicating possible associations of the proteins with VEGFRs on endothelial cell surfaces and hence angiogenic and lymphangiogenic capabilities. Strong positive staining of VEGF-C and VEGFR-3 is also observed in adipose tissue in both regenerated and original tail tissue suggesting potential roles in adipogenesis and lymphangiogenesis during fat store expansion. Positive immunostaining using the LYVE-1 lymphatic endothelium marker… Advisors/Committee Members: Orgeig, Sandra (advisor), Daniels, Christopher Brian (advisor), School of Earth and Environmental Sciences (school).

Subjects/Keywords: lymphangiogenesis; regeneration; gecko tail

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Blacker, H. A. (2011). Functional characteristics and molecular regulation of lymphangiogenesis during gecko tail regeneration: evidence for the roles of VEGF-C, VEGF-D and the receptor VEGFR-3. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/74098

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Blacker, Helen Anna. “Functional characteristics and molecular regulation of lymphangiogenesis during gecko tail regeneration: evidence for the roles of VEGF-C, VEGF-D and the receptor VEGFR-3.” 2011. Thesis, University of Adelaide. Accessed January 19, 2021. http://hdl.handle.net/2440/74098.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Blacker, Helen Anna. “Functional characteristics and molecular regulation of lymphangiogenesis during gecko tail regeneration: evidence for the roles of VEGF-C, VEGF-D and the receptor VEGFR-3.” 2011. Web. 19 Jan 2021.

Vancouver:

Blacker HA. Functional characteristics and molecular regulation of lymphangiogenesis during gecko tail regeneration: evidence for the roles of VEGF-C, VEGF-D and the receptor VEGFR-3. [Internet] [Thesis]. University of Adelaide; 2011. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2440/74098.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Blacker HA. Functional characteristics and molecular regulation of lymphangiogenesis during gecko tail regeneration: evidence for the roles of VEGF-C, VEGF-D and the receptor VEGFR-3. [Thesis]. University of Adelaide; 2011. Available from: http://hdl.handle.net/2440/74098

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Otago

3. Knox, Carey Dylan. Habitat requirements of the jewelled gecko (Naultinus gemmeus): effects of grazing, predation and habitat fragmentation .

Degree: 2011, University of Otago

URL: http://hdl.handle.net/10523/595

► Understanding factors that influence the abundance of native lizards in ecosystems modified by invasive species is important, as today these ecosystems are globally abundant. Relationships… (more)

▼ Understanding factors that influence the abundance of native lizards in ecosystems modified by invasive species is important, as today these ecosystems are globally abundant. Relationships between vegetation composition, livestock grazing and indicators of mammalian predation were examined for the native jewelled gecko, Naultinus gemmeus (Diplodactylidae) on the Otago Peninsula, South Island, New Zealand. Livestock grazing was expected to prevent the proliferation of rank grass (which is often associated with high rodent densities) and thereby reduce the frequency of predation by introduced rodents on jewelled geckos. Thus, activity of rodents was predicted to be lower and density of jewelled geckos higher at sites grazed by livestock. This was tested for two habitat types: shrubland dominated by Coprosma spp. and coastal forest dominated by kānuka (Kunzea ericoides). Abundance, density, detectability and incidence of tail loss in jewelled geckos were estimated using visual searches, photography and mark-recapture (POPAN formulation). Tracking tunnel surveys were undertaken at several sites to estimate the activity of introduced rodents. Selected habitat characteristics that were predicted to influence the density of jewelled geckos were measured and related to density using an information-theoretic approach. The activity of rodents (Rattus sp. and Mus musculus) was significantly higher at ungrazed compared to grazed sites in both Coprosma shrubland and kānuka forest. Density of jewelled geckos in Coprosma was significantly (over four times) higher at grazed sites, although there was no significant difference in density between grazed and ungrazed kānuka forest. Incidence of tail loss in jewelled geckos was significantly higher in ungrazed Coprosma shrubland, possibly due to a greater number of predation attempts by rodents. Density of jewelled geckos decreased with increasing grass height in Coprosma shrubland. Jewelled geckos favoured dense divaricating shrubs (particularly Coprosma spp., Corokia cotoneaster and Helichrysum glomeratum) and used these plants significantly more often than other plants relative to their availability. On Otago Peninsula, livestock may facilitate the persistence of high-density populations of jewelled geckos in Coprosma by reducing the abundance of their major predators. As such, controlled grazing can provide a useful means for conserving jewelled geckos. Predator control (particularly in the absence of grazing), controlled grazing (to reduce rodent abundance and therefore predation) and increasing the area of suitable jewelled gecko habitat (including the formation of habitat corridors) are considered priorities for gecko conservation. In New Zealand, the fencing-off of bush fragments is often advocated due to the potential botanical benefits (e.g. increased regeneration) associated with livestock removal. However, this research indicates that in the absence of on-going, long-term rodent control it may often be beneficial to maintain grazing at Coprosma sites in order to… Advisors/Committee Members: Seddon, Philip (advisor).

Subjects/Keywords: Naultinus; grazing; predation; gecko

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Knox, C. D. (2011). Habitat requirements of the jewelled gecko (Naultinus gemmeus): effects of grazing, predation and habitat fragmentation . (Masters Thesis). University of Otago. Retrieved from http://hdl.handle.net/10523/595

Chicago Manual of Style (16^th Edition):

Knox, Carey Dylan. “Habitat requirements of the jewelled gecko (Naultinus gemmeus): effects of grazing, predation and habitat fragmentation .” 2011. Masters Thesis, University of Otago. Accessed January 19, 2021. http://hdl.handle.net/10523/595.

MLA Handbook (7^th Edition):

Knox, Carey Dylan. “Habitat requirements of the jewelled gecko (Naultinus gemmeus): effects of grazing, predation and habitat fragmentation .” 2011. Web. 19 Jan 2021.

Vancouver:

Knox CD. Habitat requirements of the jewelled gecko (Naultinus gemmeus): effects of grazing, predation and habitat fragmentation . [Internet] [Masters thesis]. University of Otago; 2011. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10523/595.

Council of Science Editors:

Knox CD. Habitat requirements of the jewelled gecko (Naultinus gemmeus): effects of grazing, predation and habitat fragmentation . [Masters Thesis]. University of Otago; 2011. Available from: http://hdl.handle.net/10523/595

University of Ottawa

4. Cafariello, Christopher. The Identification of MTF2-specific Synthetic Lethal Interactions in Refractory Acute Myeloid Leukemia Using CRISPR .

Degree: 2019, University of Ottawa

URL: http://hdl.handle.net/10393/39886

► Acute myeloid leukemia (AML) is a disease characterized by overproduction of abnormally differentiated, hyper-proliferative myeloid cells known as blasts in bone-marrow and blood. Our laboratory… (more)

▼ Acute myeloid leukemia (AML) is a disease characterized by overproduction of abnormally differentiated, hyper-proliferative myeloid cells known as blasts in bone-marrow and blood. Our laboratory has previously demonstrated that loss of epigenetic repression by the polycomb repressive complex 2 (PRC2), which is mediated by complex member metal response element binding transcription factor 2 (MTF2), drives chemo-resistance resulting in refractory AML. In this study, to identify MTF2-specific synthetic lethal interactions, a genome-scale CRISPR Knock-out (GeCKO) synthetic lethal screen was performed in matched MTF2-deficient and rescued THP-1 cells both in the absence and presence of the induction chemotherapeutic cytarabine. Following careful analysis of screening data using specialized software, 104 highly significant MTF2-specific synthetic lethal interactions as well as 15 cytarabine-specific synthetic lethal interactions were identified. Reduced stringency upon analysis helped to identify an additional seven MTF2-specific synthetic lethal interactions that could be targeted with commercially available small-molecule inhibitors. Among eight small molecule inhibitors, two DNA Polymerase A/Ribonucleotide Reductase Catalytic Subunit M1 (POLA/RRM1) dual inhibitors (clofarabine and fludarabine) were shown to induce toxicity with specificity for MTF2-deficient THP-1 cells at low concentrations only in the absence of cytarabine. In the future, further testing of the therapeutic potential of clofarabine and fludarabine in treating MTF2-deficient AML will be conducted in patient derived bone-marrow aspirates which better represent the true clonal and hierarchical nature of this life-threatening malignancy. Furthermore, lentiviral delivery of short-hairpin RNAs (shRNAs) targeting highly significant, non-enzymatic MTF2 and cytarabine-specific synthetic lethal interactions will be performed in both THP-1 cells as well as in patient derived bone-marrow aspirates. Eventually, in vitro validated targets will be validated under in vivo conditions using a patient derived xenograft (PDX) preclinical animal model of AML using immunocompromised NOD scid gamma (NSG) mice.

Subjects/Keywords: AML; GeCKO; Screen; THP-1

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cafariello, C. (2019). The Identification of MTF2-specific Synthetic Lethal Interactions in Refractory Acute Myeloid Leukemia Using CRISPR . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/39886

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cafariello, Christopher. “The Identification of MTF2-specific Synthetic Lethal Interactions in Refractory Acute Myeloid Leukemia Using CRISPR .” 2019. Thesis, University of Ottawa. Accessed January 19, 2021. http://hdl.handle.net/10393/39886.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cafariello, Christopher. “The Identification of MTF2-specific Synthetic Lethal Interactions in Refractory Acute Myeloid Leukemia Using CRISPR .” 2019. Web. 19 Jan 2021.

Vancouver:

Cafariello C. The Identification of MTF2-specific Synthetic Lethal Interactions in Refractory Acute Myeloid Leukemia Using CRISPR . [Internet] [Thesis]. University of Ottawa; 2019. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10393/39886.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cafariello C. The Identification of MTF2-specific Synthetic Lethal Interactions in Refractory Acute Myeloid Leukemia Using CRISPR . [Thesis]. University of Ottawa; 2019. Available from: http://hdl.handle.net/10393/39886

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta

5. Bschaden, Benjamin Simon. Developing Design Guidelines for Improved Gecko Inspired Dry Adhesive Performance.

Degree: MS, Department of Mechanical Engineering, 2014, University of Alberta

URL: https://era.library.ualberta.ca/files/1831cm069

► This work provides a guideline for gecko inspired dry adhesive design and simulation. Mechanical property testing for several polymers commonly used in gecko adhesives (Kraton… (more)

Subjects/Keywords: Friction; Gecko; Adhesion; Hyperelastic; Simulation; Viscoelastic

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bschaden, B. S. (2014). Developing Design Guidelines for Improved Gecko Inspired Dry Adhesive Performance. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/1831cm069

Chicago Manual of Style (16^th Edition):

Bschaden, Benjamin Simon. “Developing Design Guidelines for Improved Gecko Inspired Dry Adhesive Performance.” 2014. Masters Thesis, University of Alberta. Accessed January 19, 2021. https://era.library.ualberta.ca/files/1831cm069.

MLA Handbook (7^th Edition):

Bschaden, Benjamin Simon. “Developing Design Guidelines for Improved Gecko Inspired Dry Adhesive Performance.” 2014. Web. 19 Jan 2021.

Vancouver:

Bschaden BS. Developing Design Guidelines for Improved Gecko Inspired Dry Adhesive Performance. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2021 Jan 19]. Available from: https://era.library.ualberta.ca/files/1831cm069.

Council of Science Editors:

Bschaden BS. Developing Design Guidelines for Improved Gecko Inspired Dry Adhesive Performance. [Masters Thesis]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/1831cm069

6. Zhuang, Mingna. An Integrative Analysis of Gecko Foot Morphology in Relation to the Evolution of the Adhesive System.

Degree: Evolution, Ecology and Organismal Biology, 2018, University of California – Riverside

URL: http://www.escholarship.org/uc/item/2396m9zk

► The foot is a crucial component to locomotion and is greatly affected by the evolution of new functions. This dissertation examines both functional and morphological… (more)

Subjects/Keywords: Biology; foot shape; gecko; geometric morphometrics; locomotion

10 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhuang, M. (2018). An Integrative Analysis of Gecko Foot Morphology in Relation to the Evolution of the Adhesive System. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/2396m9zk

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhuang, Mingna. “An Integrative Analysis of Gecko Foot Morphology in Relation to the Evolution of the Adhesive System.” 2018. Thesis, University of California – Riverside. Accessed January 19, 2021. http://www.escholarship.org/uc/item/2396m9zk.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhuang, Mingna. “An Integrative Analysis of Gecko Foot Morphology in Relation to the Evolution of the Adhesive System.” 2018. Web. 19 Jan 2021.

Vancouver:

Zhuang M. An Integrative Analysis of Gecko Foot Morphology in Relation to the Evolution of the Adhesive System. [Internet] [Thesis]. University of California – Riverside; 2018. [cited 2021 Jan 19]. Available from: http://www.escholarship.org/uc/item/2396m9zk.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhuang M. An Integrative Analysis of Gecko Foot Morphology in Relation to the Evolution of the Adhesive System. [Thesis]. University of California – Riverside; 2018. Available from: http://www.escholarship.org/uc/item/2396m9zk

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Otago

7. Gibson, Sophie. Basking behaviour of a primarily nocturnal, viviparous gecko in a temperate climate .

Degree: 2014, University of Otago

URL: http://hdl.handle.net/10523/4723

► Many reptiles, commonly labelled as ‘nocturnal’, have higher selected body temperatures on a laboratory thermal gradient than are available during their night-time activity period. These… (more)

▼ Many reptiles, commonly labelled as ‘nocturnal’, have higher selected body temperatures on a laboratory thermal gradient than are available during their night-time activity period. These purportedly ‘nocturnal’ reptiles experience similar day-time body temperatures (Tb) to diurnal reptiles, suggesting that nocturnal reptiles are capable of thermoregulating during the day. By basking for intermittent periods, utilizing postural adjustments and/or by selecting retreat types for specific thermal qualities, nocturnal reptiles may achieve elevated day-time Tb. To date, no studies have directly examined the diurnal behaviour of a nocturnal reptile in a cool-temperate climate. In this thesis, the diurnal behaviour of the viviparous (live-bearing), nocturnal Otago-Southland gecko (Woodworthia “Otago/Southland”) at Macraes Flat, Eastern Otago, was monitored using time-lapse photography. Time-lapse cameras were set up at deep crevice and superficial rock retreats over two seasons: spring-summer and autumn. Three aspects of behaviour were examined to infer whether the Otago-Southland gecko thermoregulates during the day: 1) basking behaviour, 2) postural adjustments and 3) retreat type selection. Operative temperature (Te) was recorded throughout the study using temperature loggers inserted into copper models. Copper models were used to simulate the Te available to geckos in two basking positions (flat and ‘on-toes’) and in two retreat types (in a deep crevice and under a superficial rock). I discovered that Otago-Southland geckos exhibit a complex array of diurnal behaviours. Both females and males basked and exhibited postural adjustments, yet females had a higher incidence of basking, including the ‘on-toes’ basking behaviour, compared to males. However, there were no differences in the incidence of basking between reproductive and non-reproductive females. Furthermore, no clear differences between basking duration and retreat type were found. In spring-summer basking duration of three out of the four basking behaviours was longer overall for geckos at deep crevice retreats compared to those at superficial rock retreats. However, no differences in basking duration between geckos from different retreat types were evident in autumn. The thermal profiles of copper models indicate that models in basking and in-retreat positions exhibit two distinct profiles. The models in basking positions showed lower temperatures in the early morning and consistently reached higher temperatures in the afternoon, compared to models in retreats. The models in ‘on-toes’ and flat basking positions showed similar heating profiles and reached similar temperatures. Collectively, these findings confirm that the Otago-Southland gecko uses a range of diurnal behaviours, including overt basking, postural adjustments and probably retreat type selection to thermoregulate during the day. The findings of my thesis suggest that more attention should be directed towards the diurnal behaviour of supposedly nocturnal reptiles. In chapter 3, I review the… Advisors/Committee Members: Cree, Alison (advisor).

Subjects/Keywords: basking; behaviour; gecko; nocturnal; viviparous; Woodworthia

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gibson, S. (2014). Basking behaviour of a primarily nocturnal, viviparous gecko in a temperate climate . (Masters Thesis). University of Otago. Retrieved from http://hdl.handle.net/10523/4723

Chicago Manual of Style (16^th Edition):

Gibson, Sophie. “Basking behaviour of a primarily nocturnal, viviparous gecko in a temperate climate .” 2014. Masters Thesis, University of Otago. Accessed January 19, 2021. http://hdl.handle.net/10523/4723.

MLA Handbook (7^th Edition):

Gibson, Sophie. “Basking behaviour of a primarily nocturnal, viviparous gecko in a temperate climate .” 2014. Web. 19 Jan 2021.

Vancouver:

Gibson S. Basking behaviour of a primarily nocturnal, viviparous gecko in a temperate climate . [Internet] [Masters thesis]. University of Otago; 2014. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10523/4723.

Council of Science Editors:

Gibson S. Basking behaviour of a primarily nocturnal, viviparous gecko in a temperate climate . [Masters Thesis]. University of Otago; 2014. Available from: http://hdl.handle.net/10523/4723

Linköping University

8. Ginebre, Emmanuel. Geometry-dependence of the adhesive strength of biomimetic, micropatterned surfaces.

Degree: Mechanics, 2012, Linköping University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81067

► Pressure sensitive adhesive surfaces are often inspired by nature. Miming the toe-surface of gecko, engineered surfaces made of thousands of micro-pillars show promising adhesive… (more)

Subjects/Keywords: Biomimetic; micro-patterned surface; adhesive surfaces; gecko

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ginebre, E. (2012). Geometry-dependence of the adhesive strength of biomimetic, micropatterned surfaces. (Thesis). Linköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81067

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ginebre, Emmanuel. “Geometry-dependence of the adhesive strength of biomimetic, micropatterned surfaces.” 2012. Thesis, Linköping University. Accessed January 19, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81067.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ginebre, Emmanuel. “Geometry-dependence of the adhesive strength of biomimetic, micropatterned surfaces.” 2012. Web. 19 Jan 2021.

Vancouver:

Ginebre E. Geometry-dependence of the adhesive strength of biomimetic, micropatterned surfaces. [Internet] [Thesis]. Linköping University; 2012. [cited 2021 Jan 19]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81067.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ginebre E. Geometry-dependence of the adhesive strength of biomimetic, micropatterned surfaces. [Thesis]. Linköping University; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81067

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

9. van Broekhoven, Tim (author). On the mimicking of geckos and tree frogs for adhering to soft substrates.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:823a6256-7e4d-46a6-b710-477f3c075e5e

►

Background: Soft-tissue grip is a challenge in minimally invasive surgery. Grasping instruments used in clinical practice require high pinch forces in order to generate sufficient… (more)

▼

Background: Soft-tissue grip is a challenge in minimally invasive surgery. Grasping instruments used in clinical practice require high pinch forces in order to generate sufficient grip for manipulating soft tissue without slipping. In nature, several animals employ adhesion in order to grip on, not only hard, but also soft substrates. Among these animals, geckos and tree frogs are of special interest for engineered gripping systems, because of their high body mass. The toe pads of both animals are soft and characterized by a hierarchical pillar structure ranging from micro to nanoscale. Several research groups have mimicked this structure and demonstrated its potential for adhesive grip. Next to pillars, the toe pads of both animals possess a network of stiff inner fibers, which possibly also contributes to (friction) grip. Aim: Inspired by the inner fiber network of geckos and tree frogs, the aim of this work was to investigate whether reinforcing a soft pad with stiff fibers increases friction on soft substrates as compared to a fiber-less pad. Our hypothesis was that provided that a soft exterior of such a pad establishes adhesive contact with the substrate, stiff fibers at a direction parallel to the substrate reduce the compliance of the pad in this direction, thereby preserving the established contact and thus increase the peak friction force. Methods: Three experiments were conducted. In Experiment 1, composites consisting of 3D-printed fibers encapsulated in a polydimethylsiloxane (PDMS) pad were fabricated, and their adhesion and friction forces were measured. In Experiment 2, the friction of composites with stiffer 3D-printed fibers than those in Experiment 1 was measured. Lastly, in Experiment 3, the friction of composites consisting of a carbon fiber fabric encapsulated in PDMS of various stiffness degrees were tested. All experiments were conducted on both hard and soft gelatin substrates of various stiffness degrees, the latter functioning as soft-tissue phantoms. Results: The results showed that, for all substrate types, adding 3D printed fibers with varying degrees of stiffness to a PDMS pad significantly reduced peak friction force, whereas adding a carbon fiber fabric significantly increased peak friction force compared to a fiber-less PDMS pad. The PDMS stiffness did not have a significant effect on friction force. Conclusion: The results from this research are promising for developing fiber-reinforced composites for gripping to soft substrates, including minimally invasive grasping instruments for soft-tissue grip.

Biomedical Engineering | Medical Instruments & Medical Safety (MIMS)

Advisors/Committee Members: Dodou, Dimitra (mentor), van Assenbergh, Peter (mentor), Buijnsters, Ivan (graduation committee), Mendes, Eduardo (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Mimicking; Adhering; Soft substrate; Gecko; Tree frog

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

van Broekhoven, T. (. (2017). On the mimicking of geckos and tree frogs for adhering to soft substrates. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:823a6256-7e4d-46a6-b710-477f3c075e5e

Chicago Manual of Style (16^th Edition):

van Broekhoven, Tim (author). “On the mimicking of geckos and tree frogs for adhering to soft substrates.” 2017. Masters Thesis, Delft University of Technology. Accessed January 19, 2021. http://resolver.tudelft.nl/uuid:823a6256-7e4d-46a6-b710-477f3c075e5e.

MLA Handbook (7^th Edition):

van Broekhoven, Tim (author). “On the mimicking of geckos and tree frogs for adhering to soft substrates.” 2017. Web. 19 Jan 2021.

Vancouver:

van Broekhoven T(. On the mimicking of geckos and tree frogs for adhering to soft substrates. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Jan 19]. Available from: http://resolver.tudelft.nl/uuid:823a6256-7e4d-46a6-b710-477f3c075e5e.

Council of Science Editors:

van Broekhoven T(. On the mimicking of geckos and tree frogs for adhering to soft substrates. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:823a6256-7e4d-46a6-b710-477f3c075e5e

University of North Texas

10. Xu, Quan. Dynamic Adhesion and Self-cleaning Mechanisms of Gecko Setae and Spatulae.

Degree: 2013, University of North Texas

URL: https://digital.library.unt.edu/ark:/67531/metadc407812/

► Geckos can freely climb on walls and ceilings against their body weight at speed of over 1ms-1. Switching between attachment and detachment seem simple and… (more)

▼ Geckos can freely climb on walls and ceilings against their body weight at speed of over 1ms-1. Switching between attachment and detachment seem simple and easy for geckos, without considering the surface to be dry or wet, smooth or rough, dirty or clean. In addition, gecko can shed dirt particles during use, keeping the adhesive pads clean. Mimicking this biological system can lead to a new class of dry adhesives for various applications. However, gecko’s unique dry self-cleaning mechanism remains unknown, which impedes the development of self-cleaning dry adhesives. In this dissertation we provide new evidence and self-cleaning mechanism to explain how gecko shed particles and keep its sticky feet clean. First we studied the dynamic enhancement observed between micro-sized particles and substrate under dry and wet conditions. The adhesion force of soft (polystyrene) and hard (SiO2 and Al2O3) micro-particles on soft (polystyrene) and hard (fused silica and sapphire) substrates was measured using an atomic force microscope (AFM) with retraction (z-piezo) speed ranging over 4 orders of magnitude. The adhesion is strongly enhanced by the dynamic effect. When the retraction speeds varies from 0.02 µm/s to 156 µm/s, the adhesion force increases by 10% ~ 50% in dry nitrogen while it increases by 15%~70% in humid air. A dynamic model was developed to explain this dynamic effect, which agrees well with the experimental results. Similar dynamic enhancement was also observed in aqueous solution. The influence of dynamic factors related to the adhesion enhancement, such as particle inertia, viscoelastic deformations and crack propagation, was discussed to understand the dynamic enhancement mechanisms. Although particles show dynamic enhancement, Gecko fabrillar hair shows a totally different trend. The pull off forces of a single gecko seta and spatula was tested by AFM under different pull-off velocities. The result shows that both the spatula and the seta have a rate independent adhesion response in normal retraction, which is quite different from micro-particles. Further research indicated the shape of the contact area was a key factor to the dynamic effect. In order to verify this hypothesis, artificial gecko spatula made of glass fibers was nanofabricated by a focus ion beam (FIB) and tested by AFM. These manmade spatulae also show a rate independent adhesion response. The dynamic adhesion of a single gecko seta and spatula were simulated with finite element analysis and the results also confirm the rate independent phenomena.. In conclusion, self-cleaning is induced by dynamic effect during gecko locomotion. The relative dynamic adhesion change between particles and seta makes it possible for gecko to shed the dirt particles while walking.Finally, the fatigue property of gecko seta was examined with the atomic force microscope under cyclic attachment/detachment process, mimicking gecko running. The adhesion force versus cycles has been tested and evaluated. Fatigue mechanism of gecko seta was also analyzed based on the… Advisors/Committee Members: Xia, Zhenhai, Reidy, Richard F., Scharf, Thomas, Collins, Peter, Du, Jincheng.

Subjects/Keywords: Self-cleaning; dynamic; gecko; seta; spatula; FEA

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Xu, Q. (2013). Dynamic Adhesion and Self-cleaning Mechanisms of Gecko Setae and Spatulae. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc407812/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Xu, Quan. “Dynamic Adhesion and Self-cleaning Mechanisms of Gecko Setae and Spatulae.” 2013. Thesis, University of North Texas. Accessed January 19, 2021. https://digital.library.unt.edu/ark:/67531/metadc407812/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Xu, Quan. “Dynamic Adhesion and Self-cleaning Mechanisms of Gecko Setae and Spatulae.” 2013. Web. 19 Jan 2021.

Vancouver:

Xu Q. Dynamic Adhesion and Self-cleaning Mechanisms of Gecko Setae and Spatulae. [Internet] [Thesis]. University of North Texas; 2013. [cited 2021 Jan 19]. Available from: https://digital.library.unt.edu/ark:/67531/metadc407812/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Xu Q. Dynamic Adhesion and Self-cleaning Mechanisms of Gecko Setae and Spatulae. [Thesis]. University of North Texas; 2013. Available from: https://digital.library.unt.edu/ark:/67531/metadc407812/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

11. Ulianko, Michal. Implementace RTOS do uzlu senzorové sítě: Implementation of RTOS to the WSN node.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/17479

► Wireless sensors networks mostly use event-driven OSes. This works discusses pros and cons of using RTOS in wirless sensors networks. A most appropriate RTOS is… (more)

Subjects/Keywords: WSN; RTOS; EFM32; Gecko; EnergyMicro; power management; WSN; RTOS; EFM32; Gecko; EnergyMicro; power management

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ulianko, M. (2019). Implementace RTOS do uzlu senzorové sítě: Implementation of RTOS to the WSN node. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/17479

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ulianko, Michal. “Implementace RTOS do uzlu senzorové sítě: Implementation of RTOS to the WSN node.” 2019. Thesis, Brno University of Technology. Accessed January 19, 2021. http://hdl.handle.net/11012/17479.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ulianko, Michal. “Implementace RTOS do uzlu senzorové sítě: Implementation of RTOS to the WSN node.” 2019. Web. 19 Jan 2021.

Vancouver:

Ulianko M. Implementace RTOS do uzlu senzorové sítě: Implementation of RTOS to the WSN node. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11012/17479.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ulianko M. Implementace RTOS do uzlu senzorové sítě: Implementation of RTOS to the WSN node. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/17479

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Massey University

12. Holdom, Alaine. Anchoring techniques for translocated Duvaucel's geckos (Hoplodactylus duvaucelii), and the use of cell-foam retreats by lizards and invertebrates : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Conservation Biology at Massey University, Albany, New Zealand .

Degree: 2015, Massey University

URL: http://hdl.handle.net/10179/7128

► Conservation management often requires translocations to isolated habitats, and determining the success of such events is reliant on the use of effective post-translocation monitoring (PTM)… (more)

▼ Conservation management often requires translocations to isolated habitats, and determining the success of such events is reliant on the use of effective post-translocation monitoring (PTM) techniques. Many reptile populations are already difficult to monitor, and post-release dispersal often increases this difficulty. Effective monitoring techniques for nocturnal, semi-arboreal, cryptic lizards are consequently still lacking. Furthermore, very little research has been conducted on the use of anchoring techniques for improving the PTM of lizards by reducing post-release dispersal behaviour. In early 2013, two populations of Duvaucel’s geckos (Hoplodactylus duvaucelii) were translocated to two offshore islands. This provided an excellent opportunity to investigate several aspects relating to the improvement of PTM techniques for this species. I investigated whether two anchoring techniques, i.e. temporary food provision and release into cell-foam retreats (CFRs), can reduce post-release dispersal and encourage CFR usage. Further, I assessed the usefulness of CFRs for the PTM of H. duvaucelii. Additionally, I investigated the usage of CFRs for a range of other lizard species and invertebrates. My research provided evidence that both anchoring techniques can improve the use of CFRs by H. duvaucelii in the short term. However, anchoring effects were not maintained beyond two months after release. While anchoring treatments may have delayed postrelease dispersal behaviour, they did not affect post-release dispersal distances. The study results suggest that CFRs can be a useful PTM tool for H. duvaucelii, particularly shortly after translocation, and also aid in the detection of young. In addition, I demonstrated that CFRs can detect a variety of other lizard and invertebrate species. In conclusion, this research provides valuable information for the improvement of monitoring techniques for cryptic, semi-arboreal lizards, also providing evidence that CFRs can be useful tool for monitoring a range of lizards and invertebrates.

Subjects/Keywords: Wildlife relocation, New Zealand; Conservation management; Duvaucel's gecko; Hoplodactylus duvaucelii; Cell-foam retreats; Post-translocation monitoring; Gecko monitoring; Gecko habitat; Monitoring techniques

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Holdom, A. (2015). Anchoring techniques for translocated Duvaucel's geckos (Hoplodactylus duvaucelii), and the use of cell-foam retreats by lizards and invertebrates : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Conservation Biology at Massey University, Albany, New Zealand . (Thesis). Massey University. Retrieved from http://hdl.handle.net/10179/7128

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Holdom, Alaine. “Anchoring techniques for translocated Duvaucel's geckos (Hoplodactylus duvaucelii), and the use of cell-foam retreats by lizards and invertebrates : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Conservation Biology at Massey University, Albany, New Zealand .” 2015. Thesis, Massey University. Accessed January 19, 2021. http://hdl.handle.net/10179/7128.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Holdom, Alaine. “Anchoring techniques for translocated Duvaucel's geckos (Hoplodactylus duvaucelii), and the use of cell-foam retreats by lizards and invertebrates : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Conservation Biology at Massey University, Albany, New Zealand .” 2015. Web. 19 Jan 2021.

Vancouver:

Holdom A. Anchoring techniques for translocated Duvaucel's geckos (Hoplodactylus duvaucelii), and the use of cell-foam retreats by lizards and invertebrates : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Conservation Biology at Massey University, Albany, New Zealand . [Internet] [Thesis]. Massey University; 2015. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10179/7128.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Holdom A. Anchoring techniques for translocated Duvaucel's geckos (Hoplodactylus duvaucelii), and the use of cell-foam retreats by lizards and invertebrates : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Conservation Biology at Massey University, Albany, New Zealand . [Thesis]. Massey University; 2015. Available from: http://hdl.handle.net/10179/7128

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Akron

13. Ge, Liehui. Synthetic Gecko Adhesives and Adhesion in Geckos.

Degree: PhD, Polymer Science, 2011, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1294161826

► Geckos’ feet consist of an array of millions of keratin hairs that are hierarchically split at their ends into hundreds of contact elements called… (more)

▼ Geckos’ feet consist of an array of millions of keratin hairs that are hierarchically split at their ends into hundreds of contact elements called “spatula(e)”. Spatulae make intimate contacts with surface and the attractive van der Waals (vdW) interactions are strong enough to support up to 100 times the animals’ bodyweight. Tremendous efforts have been made to mimic this adhesion with polymeric materials and carbon nanotubes (CNT). However, most of these fall short of the performance of geckos. “Contact splitting principle”, based on Johnson–Kendall–Roberts (JKR) theory, predicts that a vertically aligned carbon nanotube array (VA-CNT) will be at least 50 times stronger than gecko feet. Although 160 times higher adhesion was recorded in atomic force microscopy (AFM) measurements, macroscopic VA-CNT patches often show low or even no adhesion to substrates. The behavior of VA-CNT hairs near the contact interface has been explored using a combination of mechanical, electrical contact resistance, and scanning electron microscopic (SEM) measurements. Instead of making the expected end contacts, carbon nanotubes make significant side-wall contacts that increase with preload. Adhesion of side-wall contact CNTs is determined by the balance of adhesion in the contact region and the bending stiffness of the CNTs, thus a compliant VA-CNT array is required to make adhesive patches. Macroscopic patches of compliant VA-CNT array have been fabricated. Patches of uniform array have adhesive strength similar to that of geckos (10 N/cm²) on a variety of substrates and can be removed easily by peeling. When the array is patterned to mimic the hierarchical structures of gecko foot-hairs, strength increases up to four times. VA-CNT-based gecko adhesives are self-cleaning, non-viscoelasticity and give good strength in vacuum. These properties are desired in robotics, microelectronics, thermal management and outer space operations. Current theory still cannot completely explain adhesion of gecko feet. A series of experiments have been carried out to measure adhesion at different temperatures using a single protocol with two species of gecko that had been previously studied (G. gecko and P. dubia). Strong evidence of an effect of temperature was found but the trend was counterintuitive given the thermal biology of geckos and it violated the prediction by van der Waals interactions. Consequently, other factors (e.g., humidity) that could explain the variation in the observed clinging performance were examined. Evidence was found, unexpectedly, that humidity is likely an important determinant of clinging force in geckos. Both van der Waals and capillary forces fail to explain the shear adhesion data at the whole animal scale. Resolution of this paradox will require examination of the physical and chemical interaction at the interface and particular way in which water interacts with substrate and setae at the nanometer scale. Advisors/Committee Members: Dhinojwala, Ali (Advisor), Hamed, Gary (Committee Chair).

Subjects/Keywords: Materials Science; Nanotechnology; Physics; Polymers; synthetic gecko adhesive; vertically aligned carbon nanotube; adhesion; gecko; temperature effect; humidity effect

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ge, L. (2011). Synthetic Gecko Adhesives and Adhesion in Geckos. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1294161826

Chicago Manual of Style (16^th Edition):

Ge, Liehui. “Synthetic Gecko Adhesives and Adhesion in Geckos.” 2011. Doctoral Dissertation, University of Akron. Accessed January 19, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1294161826.

MLA Handbook (7^th Edition):

Ge, Liehui. “Synthetic Gecko Adhesives and Adhesion in Geckos.” 2011. Web. 19 Jan 2021.

Vancouver:

Ge L. Synthetic Gecko Adhesives and Adhesion in Geckos. [Internet] [Doctoral dissertation]. University of Akron; 2011. [cited 2021 Jan 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1294161826.

Council of Science Editors:

Ge L. Synthetic Gecko Adhesives and Adhesion in Geckos. [Doctoral Dissertation]. University of Akron; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1294161826

Carnegie Mellon University

14. Abusomwan, Uyiosa Anthony. Mechanics of Adhesion and Contact Self-Cleaning of Bio-Inspired Microfiber Adhesives.

Degree: 2014, Carnegie Mellon University

URL: http://repository.cmu.edu/dissertations/449

► The remarkable attachment system of geckos has inspired the development of dry microfiber adhesives through the last two decades. Some of the notable characteristics of… (more)

▼ The remarkable attachment system of geckos has inspired the development of dry microfiber adhesives through the last two decades. Some of the notable characteristics of gecko-inspired fibrillar adhesives include: strong, directional, and controllable adhesion to smooth and rough surfaces in air, vacuum, and under water; ability to maintain strong adhesion during repeated use; anti-fouling and self-cleaning after contamination. Given these outstanding qualities, fibrillar adhesives promise an extensive range of use in industrial, robotic, manufacturing, medical, and consumer products. Significant advancements have been made in the design of geckoinspired microfiber adhesives with the characteristic properties listed above, with the exception of the anti-fouling and self-cleaning features. The self-cleaning mechanism of the gecko’s adhesion system plays an important role to its ability to remain sticky in various environments. Similarly, enabling self-cleaning capability for synthetic microfiber adhesives will lead to robust performance in various areas of application. Presently, the practical use of fibrillar adhesives is restricted mainly to clean environments, where they are free from contaminants. The goal of this thesis is to conduct a detailed study of the mechanisms and mechanics of contact-based self-cleaning of gecko-inspired microfiber adhesives. This work focuses on contact self-cleaning mechanisms, as a more practical approach to cleaning. Previous studies on the cleaning of microfiber adhesives have mostly focused on mechanisms that involve complete removal of the contaminants from the adhesive. In this thesis, a second cleaning process is proposed whereby particles are removed from the tip of the microfibers and embedded between adjacent microfibers or in grooves patterned onto the adhesive, where they are no longer detrimental to the performance of the adhesive. In this work, a model of adhesion for microfiber adhesives that take the deformation of the backing layer under individual microfiber is developed. The dependence of adhesion of microfiber adhesives on the rate of unloading is also modeled and verified using experiments. The models of adhesion presented are later used to study the mechanics of contact self-cleaning of microfiber adhesives. Three major categories of self-cleaning are identified as wet self-cleaning, dynamic self-cleaning, and contact self-cleaning. A total of seven self-cleaning mechanisms that are associated with these categories are also presented and discussed. Results from the self-cleaning model and experiments show that shear loading plays an important role in self-cleaning. The underlying mechanism of contact self-cleaning due to normal and shear loading for spherical contaminants is found to be the particle rolling between the adhesive and a contacted substrate. Results from the model and experiments also show that small microfiber tips (much less than the size of the contaminants) are favorable for self-cleaning. On the other hand, large microfiber tips (much larger than…

Subjects/Keywords: biomimetrics; gecko-inspired; bio-inspired; contact mechanics; adhesion; self-cleaning

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Abusomwan, U. A. (2014). Mechanics of Adhesion and Contact Self-Cleaning of Bio-Inspired Microfiber Adhesives. (Thesis). Carnegie Mellon University. Retrieved from http://repository.cmu.edu/dissertations/449

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Abusomwan, Uyiosa Anthony. “Mechanics of Adhesion and Contact Self-Cleaning of Bio-Inspired Microfiber Adhesives.” 2014. Thesis, Carnegie Mellon University. Accessed January 19, 2021. http://repository.cmu.edu/dissertations/449.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Abusomwan, Uyiosa Anthony. “Mechanics of Adhesion and Contact Self-Cleaning of Bio-Inspired Microfiber Adhesives.” 2014. Web. 19 Jan 2021.

Vancouver:

Abusomwan UA. Mechanics of Adhesion and Contact Self-Cleaning of Bio-Inspired Microfiber Adhesives. [Internet] [Thesis]. Carnegie Mellon University; 2014. [cited 2021 Jan 19]. Available from: http://repository.cmu.edu/dissertations/449.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Abusomwan UA. Mechanics of Adhesion and Contact Self-Cleaning of Bio-Inspired Microfiber Adhesives. [Thesis]. Carnegie Mellon University; 2014. Available from: http://repository.cmu.edu/dissertations/449

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Berkeley

15. Gillies, Andrew George. Challenges for Synthetic Gecko Adhesives: Roughness, Fouling, and Wear.

Degree: Mechanical Engineering, 2013, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/7xq3b53d

► The past decade has seen rapid advancement in gecko synthetic adhesives (GSAs) and their performance has also steadily increased. However, there still remains a gap… (more)

▼ The past decade has seen rapid advancement in gecko synthetic adhesives (GSAs) and their performance has also steadily increased. However, there still remains a gap between the capabilities of current GSAs, and the properties required for GSAs to perform as the gecko does: on natural undulating surfaces with several scales of roughness, in dirty environments where particle contamination is the norm, and for thousands or even tens of thousands of cycles. For continued progress to be made in GSAs, focus must shift from trying to attain high adhesive values under ideal conditions, to exploring the weaknesses in current GSAs and contrasting those with the principles that underpin the success of the natural gecko systems in real world challenging conditions. Here we show results from the testing and simulation of various GSA systems in rough environments, with contaminating particles of varying size and for repeated cycling. We report that with careful geometry and material consideration, large increases in 'real world' performance can be obtained, and in some cases active control can be utilized to increase controllability.To better understand adhesion on macroscopic rough surfaces, we studied the ability of live Tokay Geckos to adhere to an engineered substrate constructed with sinusoidal patterns of varying amplitudes and wavelengths in sizes similar to the dimensions of the toes and lamellae structures (0.5 to 6 mm). We found shear adhesion was significantly decreased on surfaces that had amplitudes and wavelengths approaching the lamella length and inter-lamella spacing, losing 95% of shear adhesion over the range tested. We discovered that the toes are capable of adhering to surfaces with amplitudes much larger than their dimensions even without engaging claws, maintaining 60% of shear adhesion on surfaces with amplitudes of 3 mm. As well, Gecko adhesion can be predicted by the ratio of the lamella dimensions to surface feature dimensions. In addition to setae, remarkable macroscopic-scale features of gecko toes and lamellae that include compliance and passive conformation are necessary to maintain contact, and consequently, generate shear adhesion on macroscopically rough surfaces.Similarly, we sought to understand the impact of surface roughness on the adhesion of two types of GSA arrays: those with hemispherical shaped tips and those with spatula shaped tips. Our simulations showed that the nanoscale geometry of the tip shape dramatically alters the macroscale adhesion of the array, and that on sinusoidal surfaces with roughness much larger than the nanoscale features, there is still a clear benefit to having spatula shaped features. Similar to experimental results found with the macroscale features of the gecko adhesive system, when roughness approaches the size of the fiber features, adhesion drops dramatically.We have also investigated the impact of two design parameters on the dry self-cleaning capability of GSAs by experimentally testing two GSAs after fouling with small (1 micron), medium (3-10 microns)…

Subjects/Keywords: Mechanical engineering; controllable adhesion; friction; gecko adhesion; microfabrication

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gillies, A. G. (2013). Challenges for Synthetic Gecko Adhesives: Roughness, Fouling, and Wear. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/7xq3b53d

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gillies, Andrew George. “Challenges for Synthetic Gecko Adhesives: Roughness, Fouling, and Wear.” 2013. Thesis, University of California – Berkeley. Accessed January 19, 2021. http://www.escholarship.org/uc/item/7xq3b53d.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gillies, Andrew George. “Challenges for Synthetic Gecko Adhesives: Roughness, Fouling, and Wear.” 2013. Web. 19 Jan 2021.

Vancouver:

Gillies AG. Challenges for Synthetic Gecko Adhesives: Roughness, Fouling, and Wear. [Internet] [Thesis]. University of California – Berkeley; 2013. [cited 2021 Jan 19]. Available from: http://www.escholarship.org/uc/item/7xq3b53d.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gillies AG. Challenges for Synthetic Gecko Adhesives: Roughness, Fouling, and Wear. [Thesis]. University of California – Berkeley; 2013. Available from: http://www.escholarship.org/uc/item/7xq3b53d

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Riverside

16. Jagnandan, Kevin. Functional Challenges of Tail Autotomy: Locomotor Responses to a Rapid Change in Mass and Loss of Tail Function.

Degree: Evolution, Ecology and Organismal Biology, 2016, University of California – Riverside

URL: http://www.escholarship.org/uc/item/7mt6r5vq

► The ability to move effectively is critical in the survival of most animals, as locomotion plays a pivotal in prey capture, predator evasion, and other… (more)

▼ The ability to move effectively is critical in the survival of most animals, as locomotion plays a pivotal in prey capture, predator evasion, and other movements associated with acquiring resources and mates. However, terrestrial locomotion often requires compensation from the musculoskeletal system to overcome environmental or physiological demands. In this dissertation, I explore the demands associated with rapidly occurring changes in mass by addressing this phenomenon as a locomotor perturbation. In the leopard gecko, Eublepharis macularius, the tail accounts for 25% of the animal’s mass, which is shed almost instantaneously via autotomy in response to a perceived threat. Autotomy thus provides an effective natural model for studying the impacts of rapid mass change on locomotor mechanics and neuromuscular function. Investigations of morphology, 3D kinematics, and ground-reaction forces (GRFs) before and after autotomy in this species revealed a significant anterior shift in the animal’s center of mass (CoM) after sacrificing the tail, resulting in a shift to a more sprawled posture to preserve stability while adjusting to the change. Experimentally restricting natural undulatory movements of the tail revealed that this postural shift occurs when the tail is compromised in any way, not necessarily because of the altered mass. The tail is also suggested to be biomechanically linked to step length by rotation of the pelvic girdle and retraction of the femur, illuminating an additional source of the locomotor consequences of tail autotomy. Finally, electromyography (EMG) analyses were used to elucidate how motor control of the locomotor muscles are modulated in response to tail autotomy, revealing differential impacts in the forelimb and hind limb muscles that coincide with their locomotor functions. These results highlight the utility of tail autotomy as a system for studying the mechanical consequences of rapid mass change, the functional role of the tail, and the neuromuscular control of locomotion in response to altered demands. By understanding the functional consequences and adaptations of the locomotor system in response to tail autotomy, an evolutionary framework can be used to determine how selective pressures have shaped these responses.

Subjects/Keywords: Biomechanics; Physiology; Morphology; autotomy; electromyography; gecko; ground-reaction force; kinematics; locomotion

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jagnandan, K. (2016). Functional Challenges of Tail Autotomy: Locomotor Responses to a Rapid Change in Mass and Loss of Tail Function. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/7mt6r5vq

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jagnandan, Kevin. “Functional Challenges of Tail Autotomy: Locomotor Responses to a Rapid Change in Mass and Loss of Tail Function.” 2016. Thesis, University of California – Riverside. Accessed January 19, 2021. http://www.escholarship.org/uc/item/7mt6r5vq.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jagnandan, Kevin. “Functional Challenges of Tail Autotomy: Locomotor Responses to a Rapid Change in Mass and Loss of Tail Function.” 2016. Web. 19 Jan 2021.

Vancouver:

Jagnandan K. Functional Challenges of Tail Autotomy: Locomotor Responses to a Rapid Change in Mass and Loss of Tail Function. [Internet] [Thesis]. University of California – Riverside; 2016. [cited 2021 Jan 19]. Available from: http://www.escholarship.org/uc/item/7mt6r5vq.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jagnandan K. Functional Challenges of Tail Autotomy: Locomotor Responses to a Rapid Change in Mass and Loss of Tail Function. [Thesis]. University of California – Riverside; 2016. Available from: http://www.escholarship.org/uc/item/7mt6r5vq

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta

17. Walid, Khaled B. Design and Manufacture of Anisotropic Dry Adhesives for MEMS Compatible Pick and Place.

Degree: MS, Department of Mechanical Engineering, 2014, University of Alberta

URL: https://era.library.ualberta.ca/files/zk51vh936

► Directionality or anisotropy is one of the benchmark properties of gecko adhesion, allowing geckos to adhere strongly to a surface and detach easily with little… (more)

▼ Directionality or anisotropy is one of the benchmark properties of gecko adhesion, allowing geckos to adhere strongly to a surface and detach easily with little effort. Geckos achieve anisotropy by means of intricate micro-nano hierarchical structures on its feet, which is very difficult to mimic in synthetic versions. This work demonstrates that directionality can be induced on otherwise isotropic mushroom shaped fibers simply by incorporating a defect on the edges of the cap surface in a 2-step photolithography process, thus taking advantage of what is usually considered as an undesirable effect. A hypothesis based on linear beam theory is presented to explain the phenomena of defect-dependent adhesion of cylindrical fibers, and the hypothesis is confirmed with finite element analysis on mushroom shaped fibers and empirical data. The adhesion strength and directionality of the fibers were found to depend on the shape, position and size of the defect which could be tailored based on the application of the adhesive. Synthetic dry adhesives are commonly manufactured by a casting method using thermoset polymers such as polydimethylsiloxane (PDMS) and polyurethane, a procedure which has drawbacks such as long processing times, requirement of a vacuum, and relatively expensive base materials. Styrene-ethylene/butylene-styrene (SEBS) thermoplastic elastomer is introduced in this work as an alternative material for the manufacturing of mushroom-shaped adhesive fibers. Surface contamination tests using X-ray Photoelectron Spectroscopy (XPS) reveals that the SEBS thermoplastic elastomers are less likely to transfer oligomers upon contact with a die surface compared to polydimethylsiloxane (PDMS) and polyurethane, thus rendering this material more suitable for sensitive gecko adhesive applications such as MEMS pick and place. With a comparable adhesion strength, along with the added advantages of much faster manufacturing using thermo-compression molding, scalability, less expensive and non-toxic raw materials, thermoplastic elastomers appear to be better suited for large scale manufacturing of these bio-mimetic adhesives.

Subjects/Keywords: Oligomer Transfer; Thermoplastic Elastomer; Directional; Gecko; van der Waals; Dry Adhesive

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Walid, K. B. (2014). Design and Manufacture of Anisotropic Dry Adhesives for MEMS Compatible Pick and Place. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/zk51vh936

Chicago Manual of Style (16^th Edition):

Walid, Khaled B. “Design and Manufacture of Anisotropic Dry Adhesives for MEMS Compatible Pick and Place.” 2014. Masters Thesis, University of Alberta. Accessed January 19, 2021. https://era.library.ualberta.ca/files/zk51vh936.

MLA Handbook (7^th Edition):

Walid, Khaled B. “Design and Manufacture of Anisotropic Dry Adhesives for MEMS Compatible Pick and Place.” 2014. Web. 19 Jan 2021.

Vancouver:

Walid KB. Design and Manufacture of Anisotropic Dry Adhesives for MEMS Compatible Pick and Place. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2021 Jan 19]. Available from: https://era.library.ualberta.ca/files/zk51vh936.

Council of Science Editors:

Walid KB. Design and Manufacture of Anisotropic Dry Adhesives for MEMS Compatible Pick and Place. [Masters Thesis]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/zk51vh936

University of Otago

18. Penniket, Sophie. Trends in body size and female reproductive frequency with elevation and temperature in a primarily nocturnal, viviparous gecko .

Degree: 2012, University of Otago

URL: http://hdl.handle.net/10523/2382

► Bergmann’s rule predicts an increase in body size with increasing elevation and decreasing temperature; however, a published review has found the reverse pattern in the… (more)

▼ Bergmann’s rule predicts an increase in body size with increasing elevation and decreasing temperature; however, a published review has found the reverse pattern in the majority of lizards. It is thought that for these ectotherms, small body size may provide thermal benefits, when basking, that would be highly advantageous in cold environments. This suggestion is supported by experimental studies that report faster heat gain in small-sized sun-basking lizards than in larger lizards of the same species. However, this explanation may not apply to species that do not avidly sun-bask, and it is possible that for nocturnal species, a small body size at high elevations is not advantageous. Bergmann’s rule has not been closely studied in a nocturnal lizard, and, furthermore, it is not known which body size (small or large) confers thermal benefits for lizards that do not frequently sun-bask. In this thesis, the Otago-Southland gecko (Woodworthia “Otago-Southland”) was used as a model to examine how body size changes with elevation in a primarily nocturnal lizard. I measured adult and juvenile geckos from seven sites over a range of 54-1039 metres above sea level (m asl). I also examined variation in inferred reproductive frequency of females (which have previously been reported as reproducing biennially at c. 600-700 m asl). Environmental temperature was recorded using data loggers. In a separate laboratory study, I used physical models to investigate whether small body size (which confers thermal benefits for sun-basking lizards) is also advantageous for nocturnal lizards. I found that the Otago-Southland gecko showed a significant increase in size with elevation, the opposite of the dominant pattern in diurnal lizards. Female size at maturity, maximum size of adults and size at birth were larger at higher elevations and at lower temperatures. Inferred reproductive frequency did not vary significantly with elevation or with temperature; however, it was clear that the populations were not all on the same inferred reproductive cycle. Using physical models, I found that large body size might confer thermal benefits for nocturnal lizards that remain under cover within warm retreat sites. The results of my thesis contrast with those of other studies, suggesting that, for this nocturnal lizard, large body size at high elevations is advantageous. I discuss mechanisms that may cause large body size, for example slow growth rates at cold temperatures. I also consider benefits to large size at high elevations, including larger energy stores to manage the challenges of reproduction and prolonged inactivity over winter. The findings of my thesis suggest that Bergmann’s rule should not be dismissed for all lizards, but may in fact be valid for nocturnal species that bask indirectly. Advisors/Committee Members: Cree, Alison (advisor).

Subjects/Keywords: life-history; elevation; nocturnal; gecko; temperature; female reproduction; body size

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Penniket, S. (2012). Trends in body size and female reproductive frequency with elevation and temperature in a primarily nocturnal, viviparous gecko . (Masters Thesis). University of Otago. Retrieved from http://hdl.handle.net/10523/2382

Chicago Manual of Style (16^th Edition):

Penniket, Sophie. “Trends in body size and female reproductive frequency with elevation and temperature in a primarily nocturnal, viviparous gecko .” 2012. Masters Thesis, University of Otago. Accessed January 19, 2021. http://hdl.handle.net/10523/2382.

MLA Handbook (7^th Edition):

Penniket, Sophie. “Trends in body size and female reproductive frequency with elevation and temperature in a primarily nocturnal, viviparous gecko .” 2012. Web. 19 Jan 2021.

Vancouver:

Penniket S. Trends in body size and female reproductive frequency with elevation and temperature in a primarily nocturnal, viviparous gecko . [Internet] [Masters thesis]. University of Otago; 2012. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10523/2382.

Council of Science Editors:

Penniket S. Trends in body size and female reproductive frequency with elevation and temperature in a primarily nocturnal, viviparous gecko . [Masters Thesis]. University of Otago; 2012. Available from: http://hdl.handle.net/10523/2382

University of Washington

19. Prowse, Michael. Environmental Effects on the Mechanical Properties and Adhesion of Gecko Setae.

Degree: PhD, 2012, University of Washington

URL: http://hdl.handle.net/1773/20657

► Geckos have an amazing ability to climb walls and cling to inverted surfaces. While other terrestrial animals, such as tree frogs also process such abilities,… (more)

▼ Geckos have an amazing ability to climb walls and cling to inverted surfaces. While other terrestrial animals, such as tree frogs also process such abilities, geckos are unique given their reasonably large body mass. Geckos owe their remarkable adhesiveness to millions of dry setae on their toes, and the mechanism of adhesion in gecko setae has been the topic of scientific scrutiny for over two hundred years. Previously, it was demonstrated that van der Waals forces alone are sufficient for strong adhesion and friction in gecko setae. However, more recent studies have demonstrated that adhesion increases with relative humidity (RH) and proposed that surface hydration and capillary water bridge formation is important or even necessary. In this study, we confirmed a considerable effect of RH on gecko adhesion; but we reject the capillary adhesion premise. While the contact forces of isolated Tokay gecko setal arrays increased with humidity, the increase was similar on both hydrophobic and hydrophilic surfaces which are inconsistent with a capillary adhesion mechanism. Additionally, contact forces increased with RH even at high shear rates, where capillary bridge formation is too slow to contribute to adhesion. How can a humidity-related increase in adhesive and frictional force be explained? The effect of relative humidity on the mechanical properties of setal â-keratin has escaped consideration. We discovered that an increase in RH softens setae and increases viscoelastic damping, which increases adhesion. We measured the effect of RH on the tensile deformation properties, fracture, and dynamic mechanical response of an isolated tokay gecko setae and strips of the smooth lamellar epidermal layer. The mechanical properties of gecko setae were affected strongly by RH. The changes in mechanical properties of setal keratin were consistent with previously reported increases in contact forces, supporting the hypothesis that an increase in RH softens setal keratin. Changes in setal materials properties, not capillary forces, fully explain humidity-enhanced adhesion, and van der Waals forces remain the only empirically supported mechanism of adhesion in geckos. Advisors/Committee Members: Autumn, Kellar (advisor).

Subjects/Keywords: adhesion; Gecko; humidity effects; mechanical properties; Materials Science; Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Prowse, M. (2012). Environmental Effects on the Mechanical Properties and Adhesion of Gecko Setae. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/20657

Chicago Manual of Style (16^th Edition):

Prowse, Michael. “Environmental Effects on the Mechanical Properties and Adhesion of Gecko Setae.” 2012. Doctoral Dissertation, University of Washington. Accessed January 19, 2021. http://hdl.handle.net/1773/20657.

MLA Handbook (7^th Edition):

Prowse, Michael. “Environmental Effects on the Mechanical Properties and Adhesion of Gecko Setae.” 2012. Web. 19 Jan 2021.

Vancouver:

Prowse M. Environmental Effects on the Mechanical Properties and Adhesion of Gecko Setae. [Internet] [Doctoral dissertation]. University of Washington; 2012. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/1773/20657.

Council of Science Editors:

Prowse M. Environmental Effects on the Mechanical Properties and Adhesion of Gecko Setae. [Doctoral Dissertation]. University of Washington; 2012. Available from: http://hdl.handle.net/1773/20657

Delft University of Technology

20. Cheung, Eunice (author). Friction Forces of Micropatterned Elastomers with Carbon Fibre Fabric Reinforcement on Soft Substrates.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d76ae286-972d-4f33-99a3-7a4fcf7bb501

►

Gecko-inspired adhesives mimic the external structure of geckos with micropatterned surfaces and the internal structure by fabric reinforcement in soft elastomer adhesive pads. Previous research… (more)

▼

Gecko-inspired adhesives mimic the external structure of geckos with micropatterned surfaces and the internal structure by fabric reinforcement in soft elastomer adhesive pads. Previous research measured the friction forces of synthetic adhesives, with either an external or internal structure, mainly on hard substrates. Much less is known about the effects on static friction forces on soft substrates of adhesives with a combined external and internal structure and with a contact area beyond a centimetre square. We fabricated 40 by 40 mm adhesive pads (Epad = 2.1 +/- 0.1 MPa) from polydimethylsiloxane (PDMS) elastomer and tested them on two soft PDMS substrates (Esub = 2.6 +/- 0.2 MPa and 1.0 +/- 0.1 MPa). A colloidal lithographic approach was used to fabricate the external structures of the adhesive pads with microscale dimples with and without a terminal layer (TL). The internal structures were fabricated by reinforcement of the adhesive pads with carbon fibre fabric (CFF), which varied in the types of CFF weave and its orientation with respect to the substrate. We found that samples without an external structure generated lower friction on the softer substrates, whereas samples with micropatterned surface generated similar friction between the substrates, presumably due to mechanical interlocking between the external structure and soft substrates. Samples with microscale dimples without TL generated the lowest friction forces among all samples, likely due to limited initial contact with the substrates. Samples with microscale dimples with TL generated similar friction forces as samples without an external structure. Those samples with TL were not able to generate higher friction, due to their fabrication method which restricted the movement of the fibre bundles, hindering the stress redistribution along the sample during the measurements. Samples with an internal structure showed significant higher friction compared to samples without reinforcement, due to a better stress distribution along the samples, but generated similar friction forces among the types of CFF weave.

BioMedical Engineering

Advisors/Committee Members: Dodou, Dimitra (mentor), van Assenbergh, Peter (mentor), Popovich, Vera (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Gecko; Micropattern; Carbon fibre; Friction; Soft substrate; Adhesive

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cheung, E. (. (2019). Friction Forces of Micropatterned Elastomers with Carbon Fibre Fabric Reinforcement on Soft Substrates. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d76ae286-972d-4f33-99a3-7a4fcf7bb501

Chicago Manual of Style (16^th Edition):

Cheung, Eunice (author). “Friction Forces of Micropatterned Elastomers with Carbon Fibre Fabric Reinforcement on Soft Substrates.” 2019. Masters Thesis, Delft University of Technology. Accessed January 19, 2021. http://resolver.tudelft.nl/uuid:d76ae286-972d-4f33-99a3-7a4fcf7bb501.

MLA Handbook (7^th Edition):

Cheung, Eunice (author). “Friction Forces of Micropatterned Elastomers with Carbon Fibre Fabric Reinforcement on Soft Substrates.” 2019. Web. 19 Jan 2021.

Vancouver:

Cheung E(. Friction Forces of Micropatterned Elastomers with Carbon Fibre Fabric Reinforcement on Soft Substrates. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 19]. Available from: http://resolver.tudelft.nl/uuid:d76ae286-972d-4f33-99a3-7a4fcf7bb501.

Council of Science Editors:

Cheung E(. Friction Forces of Micropatterned Elastomers with Carbon Fibre Fabric Reinforcement on Soft Substrates. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:d76ae286-972d-4f33-99a3-7a4fcf7bb501

University of Arizona

21. Baker, Scott Michael. Server Virtualization .

Degree: 2005, University of Arizona

URL: http://hdl.handle.net/10150/193731

► The client/server paradigm is a common means of implementing an application over a computer network. Servers provide services, such as access to files, directories, or… (more)

Subjects/Keywords: mirage; nfs; virtualization; gecko

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Baker, S. M. (2005). Server Virtualization . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/193731

Chicago Manual of Style (16^th Edition):

Baker, Scott Michael. “Server Virtualization .” 2005. Doctoral Dissertation, University of Arizona. Accessed January 19, 2021. http://hdl.handle.net/10150/193731.

MLA Handbook (7^th Edition):

Baker, Scott Michael. “Server Virtualization .” 2005. Web. 19 Jan 2021.

Vancouver:

Baker SM. Server Virtualization . [Internet] [Doctoral dissertation]. University of Arizona; 2005. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10150/193731.

Council of Science Editors:

Baker SM. Server Virtualization . [Doctoral Dissertation]. University of Arizona; 2005. Available from: http://hdl.handle.net/10150/193731

University of Guelph

22. Donato, Sarah. A Spatiotemporal Characterization of Neural Stem/Progenitor Cells in the Body Spinal Cord of the Leopard Gecko (Eublepharis macularius).

Degree: MS, Department of Biomedical Sciences, 2017, University of Guelph

URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/11548

► The leopard gecko is an emerging model for studies of spinal cord regeneration. Populations of neural stem/progenitor cells (NSPCs) within the original tail spinal cord… (more)

Subjects/Keywords: neural stem cells; lizard; leopard gecko; radial glia; regeneration; spinal cord

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Donato, S. (2017). A Spatiotemporal Characterization of Neural Stem/Progenitor Cells in the Body Spinal Cord of the Leopard Gecko (Eublepharis macularius). (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/11548

Chicago Manual of Style (16^th Edition):

Donato, Sarah. “A Spatiotemporal Characterization of Neural Stem/Progenitor Cells in the Body Spinal Cord of the Leopard Gecko (Eublepharis macularius).” 2017. Masters Thesis, University of Guelph. Accessed January 19, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/11548.

MLA Handbook (7^th Edition):

Donato, Sarah. “A Spatiotemporal Characterization of Neural Stem/Progenitor Cells in the Body Spinal Cord of the Leopard Gecko (Eublepharis macularius).” 2017. Web. 19 Jan 2021.

Vancouver:

Donato S. A Spatiotemporal Characterization of Neural Stem/Progenitor Cells in the Body Spinal Cord of the Leopard Gecko (Eublepharis macularius). [Internet] [Masters thesis]. University of Guelph; 2017. [cited 2021 Jan 19]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/11548.

Council of Science Editors:

Donato S. A Spatiotemporal Characterization of Neural Stem/Progenitor Cells in the Body Spinal Cord of the Leopard Gecko (Eublepharis macularius). [Masters Thesis]. University of Guelph; 2017. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/11548

University of Canterbury

23. Tocher, Mandy Darlene. The New Zealand common gecko Hoplodactylus maculatus: an ecophysiological comparsion of two isolated populations.

Degree: MS, Zoology, 1992, University of Canterbury

URL: http://dx.doi.org/10.26021/8452

► Thermophysiological traits of two isolated Hoplodactylus maculatus populations were investigated to test adpatations to climate. Geckos were collected from Craigieburn (high altitude, generally cooler site)… (more)

▼ Thermophysiological traits of two isolated Hoplodactylus maculatus populations were investigated to test adpatations to climate. Geckos were collected from Craigieburn (high altitude, generally cooler site) and Banks Peninsula. If climatic conditions at respective sites influenced physiology, I expected geckos from Craigieburn to exhibit cold-adapted physiological traits, whilst Banks Peninsula geckos would exhibit traits more characteristic of a warmclimate species. To this end I investigated four thermophysiological parameters: metabolism (SMR), preferred body temperature (PBT), locomotory performance and critical thermal minimum (CTMin). I hypothesized that if climate had an effect on SMR, Craigieburn geckos would exhibit higher levels of SMR which typically characterise other coolclimate reptiles. Craigieburn geckos displayed an average relative elevation of SMR over Banks Peninsula geckos of 26%. Furthermore, Craigieburn geckos appeared to be 'geared' towards lower body temperatures and exhibited a greater acclimatory and acclimatizatory ability of SMR. The PBT of Craigieburn geckos was consistently elevated above Banks Peninsula geckos. This finding was somewhat paradoxical in light of previous studies of this parameter. A closer examination of the ecology of the two populations is required to clarify the adaptive significance of a higher PBT in geckos from a cooler climate. With respect to locomotory performance, I hypothesized that if thermal extremes influenced activity, Craigieburn geckos would exhibit activity patterns which help ameliorate the adverse effects of cold temperature. Craigieburn geckos did in fact have greater independence of activity to temperature than Banks Peninsula geckos, especially over lower body temperatures. The final parameter investigated, that of the critical thermal minimum, failed to distinguish the populations decisively. However there was some evidence of a greater acclimatizatory and acclimatory range in Craigieburn geckos, providing somewhat limited support for a population difference. Investigations into all four parameters lead me to conclude that populations of Hoplodactylus maculatus from Craigieburn and Banks Peninsula are physiologically distinct and warrant a revision of nomenclature.

Subjects/Keywords: Common gecko; New Zealand; ecophysiology

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tocher, M. D. (1992). The New Zealand common gecko Hoplodactylus maculatus: an ecophysiological comparsion of two isolated populations. (Masters Thesis). University of Canterbury. Retrieved from http://dx.doi.org/10.26021/8452

Chicago Manual of Style (16^th Edition):

Tocher, Mandy Darlene. “The New Zealand common gecko Hoplodactylus maculatus: an ecophysiological comparsion of two isolated populations.” 1992. Masters Thesis, University of Canterbury. Accessed January 19, 2021. http://dx.doi.org/10.26021/8452.

MLA Handbook (7^th Edition):

Tocher, Mandy Darlene. “The New Zealand common gecko Hoplodactylus maculatus: an ecophysiological comparsion of two isolated populations.” 1992. Web. 19 Jan 2021.

Vancouver:

Tocher MD. The New Zealand common gecko Hoplodactylus maculatus: an ecophysiological comparsion of two isolated populations. [Internet] [Masters thesis]. University of Canterbury; 1992. [cited 2021 Jan 19]. Available from: http://dx.doi.org/10.26021/8452.

Council of Science Editors:

Tocher MD. The New Zealand common gecko Hoplodactylus maculatus: an ecophysiological comparsion of two isolated populations. [Masters Thesis]. University of Canterbury; 1992. Available from: http://dx.doi.org/10.26021/8452

24. Pinto, Brendan John. Small Geckos Yield Great Insight into the Patterns and Processes of Speciation and Sex Chromosome Evolution.

Degree: 2020, Marquette University

URL: https://epublications.marquette.edu/dissertations_mu/993

► Determining the mechanisms that create and maintain biodiversity is a central question in ecology and evolution. Speciation is the process that creates biodiversity. Speciation can… (more)

Subjects/Keywords: evolution; gecko; herpetology; hybridization; sex chromosomes; speciation; Biology

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pinto, B. J. (2020). Small Geckos Yield Great Insight into the Patterns and Processes of Speciation and Sex Chromosome Evolution. (Thesis). Marquette University. Retrieved from https://epublications.marquette.edu/dissertations_mu/993

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pinto, Brendan John. “Small Geckos Yield Great Insight into the Patterns and Processes of Speciation and Sex Chromosome Evolution.” 2020. Thesis, Marquette University. Accessed January 19, 2021. https://epublications.marquette.edu/dissertations_mu/993.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pinto, Brendan John. “Small Geckos Yield Great Insight into the Patterns and Processes of Speciation and Sex Chromosome Evolution.” 2020. Web. 19 Jan 2021.

Vancouver:

Pinto BJ. Small Geckos Yield Great Insight into the Patterns and Processes of Speciation and Sex Chromosome Evolution. [Internet] [Thesis]. Marquette University; 2020. [cited 2021 Jan 19]. Available from: https://epublications.marquette.edu/dissertations_mu/993.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pinto BJ. Small Geckos Yield Great Insight into the Patterns and Processes of Speciation and Sex Chromosome Evolution. [Thesis]. Marquette University; 2020. Available from: https://epublications.marquette.edu/dissertations_mu/993

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Akron

25. Ramirez, Edward A. Gecko Digital Hyperextension: Kinematics, Surface Roughness and Locomotor Performance.

Degree: MS, Biology, 2012, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1333986580

► The mechanics of gecko adhesion have been tested extensively at the micro- and nanoscopic scale. However, relatively few studies have examined the adhesive system at… (more)

Subjects/Keywords: Zoology; gecko adhesion digital hyperextension kinematics surface roughness

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ramirez, E. A. (2012). Gecko Digital Hyperextension: Kinematics, Surface Roughness and Locomotor Performance. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1333986580

Chicago Manual of Style (16^th Edition):

Ramirez, Edward A. “Gecko Digital Hyperextension: Kinematics, Surface Roughness and Locomotor Performance.” 2012. Masters Thesis, University of Akron. Accessed January 19, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1333986580.

MLA Handbook (7^th Edition):

Ramirez, Edward A. “Gecko Digital Hyperextension: Kinematics, Surface Roughness and Locomotor Performance.” 2012. Web. 19 Jan 2021.

Vancouver:

Ramirez EA. Gecko Digital Hyperextension: Kinematics, Surface Roughness and Locomotor Performance. [Internet] [Masters thesis]. University of Akron; 2012. [cited 2021 Jan 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1333986580.

Council of Science Editors:

Ramirez EA. Gecko Digital Hyperextension: Kinematics, Surface Roughness and Locomotor Performance. [Masters Thesis]. University of Akron; 2012. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1333986580

University of Alberta

26. Ferguson, Brendan J. Improved Gecko Inspired Dry Adhesives Applied to the Packaging of MEMS.

Degree: MS, Department of Mechanical Engineering, 2013, University of Alberta

URL: https://era.library.ualberta.ca/files/8w32r610x

► An alternative method of manipulating fragile MEMS devices during fabrication has been developed. A specialized manual or robotic end effector utilizing a gecko inspired adhesive… (more)

Subjects/Keywords: Packaging; Gel-Pak; Antistatic; Adhesion testing; Bioinspired; Adhesion; Dry Adhesives; Polymer; Gecko; Pick and Place; Dry adhesion; Micromolding; Micralyne; MEMS; Gecko Inspired Adhesion; Polyurethane

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ferguson, B. J. (2013). Improved Gecko Inspired Dry Adhesives Applied to the Packaging of MEMS. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/8w32r610x

Chicago Manual of Style (16^th Edition):

Ferguson, Brendan J. “Improved Gecko Inspired Dry Adhesives Applied to the Packaging of MEMS.” 2013. Masters Thesis, University of Alberta. Accessed January 19, 2021. https://era.library.ualberta.ca/files/8w32r610x.

MLA Handbook (7^th Edition):

Ferguson, Brendan J. “Improved Gecko Inspired Dry Adhesives Applied to the Packaging of MEMS.” 2013. Web. 19 Jan 2021.

Vancouver:

Ferguson BJ. Improved Gecko Inspired Dry Adhesives Applied to the Packaging of MEMS. [Internet] [Masters thesis]. University of Alberta; 2013. [cited 2021 Jan 19]. Available from: https://era.library.ualberta.ca/files/8w32r610x.

Council of Science Editors:

Ferguson BJ. Improved Gecko Inspired Dry Adhesives Applied to the Packaging of MEMS. [Masters Thesis]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/8w32r610x

Brno University of Technology

27. Vídeňský, Martin. Mozilla jako vývojová platforma: Mozilla as a Development Platform.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/53123

► This thesis deals with introduction of Mozilla as a development platform. Thesis is divided into four parts. The first one consists of a theoretical introduction,… (more)

Subjects/Keywords: ECMAScript; Firefox; Gecko; Mozilla; Platforma; RDF; XBL; XML; XPCOM; XPCONECT; XUL; XULRunner; ECMAScript; Firefox; Gecko; Mozilla; Platform; RDF; XBL; XML; XPCOM; XPCONECT; XUL; XULRunner

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vídeňský, M. (2018). Mozilla jako vývojová platforma: Mozilla as a Development Platform. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/53123

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Vídeňský, Martin. “Mozilla jako vývojová platforma: Mozilla as a Development Platform.” 2018. Thesis, Brno University of Technology. Accessed January 19, 2021. http://hdl.handle.net/11012/53123.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Vídeňský, Martin. “Mozilla jako vývojová platforma: Mozilla as a Development Platform.” 2018. Web. 19 Jan 2021.

Vancouver:

Vídeňský M. Mozilla jako vývojová platforma: Mozilla as a Development Platform. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11012/53123.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Vídeňský M. Mozilla jako vývojová platforma: Mozilla as a Development Platform. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/53123

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Tulane University

28. Jin, Kejia. Design and fabrication of polymer based dry adhesives inspired by the gecko adhesive system.

Degree: PhD, 2013, Tulane University

URL: https://digitallibrary.tulane.edu/islandora/object/tulane:25222

►

There has been significant interest in developing dry adhesives mimicking the gecko adhesive system, which offers several advantages compared to conventional pressure sensitive adhesives. Specifically,… (more)

▼

There has been significant interest in developing dry adhesives mimicking the gecko adhesive system, which offers several advantages compared to conventional pressure sensitive adhesives. Specifically, gecko adhesive pads have anisotropic adhesion properties: the adhesive pads (spatulae) stick strongly when sheared in one direction but are non-adherent when sheared in the opposite direction. This anisotropy property is attributed to the complex topography of the array of fine tilted and curved columnar structures (setae) that bear the spatulae. In this thesis, easy, scalable methods, relying on conventional and unconventional techniques are presented to incorporate tilt in the fabrication of synthetic polymer-based dry adhesives mimicking the gecko adhesive system, which provide anisotropic adhesion properties. In the first part of the study, the anisotropic adhesion and friction properties of samples with various tilt angles to test the validity of a nanoscale tape-peeling model of spatular function are measured. Consistent with the Peel Zone model, samples with lower tilt angles yielded larger adhesion forces. Contact mechanics of the synthetic array were highly anisotropic, consistent with the frictional adhesion model and gecko-like. Based on the original design, a new design of gecko-like dry adhesives was developed which showed superior tribological properties and furthermore showed anisotropic adhesive properties without the need for tilt in the structures. These adhesives can be used to reversibly suspend weights from vertical surfaces (e.g., walls) and, for the first time to our knowledge, horizontal surfaces (e.g., ceilings) by simultaneously and judiciously activating anisotropic friction and adhesion forces. Furthermore, adhesion properties between artificial gecko-inspired dry adhesives and rough substrates with varying roughness are studied. The results suggest that both adhesion and friction forces on a rough substrate depends significantly on the geometrical parameters of the substrate. The results in this study may be helpful for understanding how geckos overcome the influence of natural surface roughness. The novel designs of our dry adhesives open the way for new gecko-like adhesive surfaces and articulation mechanisms that do not rely on intensive nanofabrication.

Advisors/Committee Members: Pesika, Noshir (Thesis advisor).

Subjects/Keywords: Dry adhesive; Gecko-inspired; Biomimetic; School of Science & Engineering; Chemical and Biomolecular Engineering; Ph.D

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jin, K. (2013). Design and fabrication of polymer based dry adhesives inspired by the gecko adhesive system. (Doctoral Dissertation). Tulane University. Retrieved from https://digitallibrary.tulane.edu/islandora/object/tulane:25222

Chicago Manual of Style (16^th Edition):

Jin, Kejia. “Design and fabrication of polymer based dry adhesives inspired by the gecko adhesive system.” 2013. Doctoral Dissertation, Tulane University. Accessed January 19, 2021. https://digitallibrary.tulane.edu/islandora/object/tulane:25222.

MLA Handbook (7^th Edition):

Jin, Kejia. “Design and fabrication of polymer based dry adhesives inspired by the gecko adhesive system.” 2013. Web. 19 Jan 2021.

Vancouver:

Jin K. Design and fabrication of polymer based dry adhesives inspired by the gecko adhesive system. [Internet] [Doctoral dissertation]. Tulane University; 2013. [cited 2021 Jan 19]. Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:25222.

Council of Science Editors:

Jin K. Design and fabrication of polymer based dry adhesives inspired by the gecko adhesive system. [Doctoral Dissertation]. Tulane University; 2013. Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:25222

Universidade Federal de Viçosa

29. Rafael Marins Rezende. Morfologia do coração da lagartixa Hemidactylus mabouia (Moreau Jonnès, 1818) (Squamata: Gekkonidae).

Degree: 2011, Universidade Federal de Viçosa

URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3780

►

A lagartixa da espécie Hemidactylus mabouia (Gekkonidae) é uma colonizadora eficiente, bem estabelecida no Brasil e associada a áreas urbanas. Tem hábitos noturnos e pode… (more)

▼

A lagartixa da espécie Hemidactylus mabouia (Gekkonidae) é uma colonizadora eficiente, bem estabelecida no Brasil e associada a áreas urbanas. Tem hábitos noturnos e pode ser encontrada próxima a fontes luminosas, sendo de fácil captura e utilização nos modelos experimentais com répteis. Assim, visando descrever a morfologia do coração da H. mabouia, e buscando caracteres que possam contribuir para estudos comparativos dos répteis, foram utilizados 11 exemplares adultos, sendo coletados fragmentos do coração, os quais foram processados conforme métodos rotineiros para análise anatômica, histológica, histoquímica e ultra-estrutural. O coração da lagartixa H. mabouia, assim como o da maioria dos répteis não-crocodilianos, possui o seio venoso, dois átrios e um ventrículo, incompletamente separado, ocorrendo mistura parcial de sangue oxigenado e desoxigenado. O seio venoso é uma câmara tubular de paredes finas, formada por músculo cardíaco e tecido conjuntivo que recebe as veias pré-cava esquerda, pré-cava direita e pós-cava. Os átrios apresentam forma tetraédrica irregular, suas paredes são finas e formadas por miocárdio esponjoso. O átrio esquerdo é menor e menos muscular que o átrio direito. Ele recebe a veia pulmonar, a qual se abre em sua parede dorsal. O ventrículo apresenta um miocárdio compacto circundando o miocárdio esponjoso. O interior da câmara ventricular é dividido em três subcâmaras interconectadas: cavo pulmonar, cavo venoso e cavo arterioso. As três subcâmaras intercomunicam-se, mas possuem dois importantes septos musculares incompletos: o septo vertical e o septo ventricular. Os núcleos observados aparecem ovóides e alongados. Também se observou a presença tanto de células cartilaginosas (no suporte cartilaginoso do septo aorticopulmonar), quanto de células ósseas (localizadas na estrutura óssea) localizada à extremidade anterior do septo ventricular. Tanto os átrios, quanto o ventrículo são recobertos externamente pelo epicárdio e internamente pelo endocárdio. As fibras musculares apresentam estrias, mas o arranjo das miofibrilas não parece ser sempre uniforme dentro da mesma fibra. Não foi possível observar figuras inequívocas de discos intercalares.

The lizard of the species Hemidactylus mabouia (Gekkonidae) is an efficient colonizer, well established in Brazil and typically found in urban areas areas. It is a nocturnal species that can be found near light sources, is easy to capture and use in experimental models with reptiles. Thus, in order to describe the morphology of the H. mabouia heart, and looking characters that can contribute to comparative studies of reptiles, 11 adult specimens were used which were collected fragments of the heart that were processed according to routine methods for analyzing anatomical, histological, histochemical and ultrastructural. The heart of the gecko H. mabouia, like most non-crocodilian reptiles, has the sinus venosus, two atria and one ventricle, incompletely separated, occurring partial misture between arterial and venous blood. The sinus venosus is a…

Advisors/Committee Members: Sirlene Souza Rodrigues Sartori, Vinícius Albano Araújo, Mariella Bomtempo Duca de Freitas, Cristina Delarete Drummond, Clóvis Andrade Neves.

Subjects/Keywords: BIOLOGIA GERAL; Anatomia; Histologia; Ultra-estrutura; Coração; Lagartixa; Anatomy; Histology; Ultrastructure; Heart; Gecko

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rezende, R. M. (2011). Morfologia do coração da lagartixa Hemidactylus mabouia (Moreau Jonnès, 1818) (Squamata: Gekkonidae). (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3780

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rezende, Rafael Marins. “Morfologia do coração da lagartixa Hemidactylus mabouia (Moreau Jonnès, 1818) (Squamata: Gekkonidae).” 2011. Thesis, Universidade Federal de Viçosa. Accessed January 19, 2021. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3780.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rezende, Rafael Marins. “Morfologia do coração da lagartixa Hemidactylus mabouia (Moreau Jonnès, 1818) (Squamata: Gekkonidae).” 2011. Web. 19 Jan 2021.

Vancouver:

Rezende RM. Morfologia do coração da lagartixa Hemidactylus mabouia (Moreau Jonnès, 1818) (Squamata: Gekkonidae). [Internet] [Thesis]. Universidade Federal de Viçosa; 2011. [cited 2021 Jan 19]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3780.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rezende RM. Morfologia do coração da lagartixa Hemidactylus mabouia (Moreau Jonnès, 1818) (Squamata: Gekkonidae). [Thesis]. Universidade Federal de Viçosa; 2011. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3780

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Guelph

30. Gilbert, Richard W.D. Characterization of TGFb signaling during epimorphic tissue regeneration: an example using the leopard gecko (Eublepharis macularius) tail regeneration model.

Degree: MS, Department of Biomedical Sciences, 2013, University of Guelph

URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/6609

► The transforming growth factor beta (TGFβ)/activin signaling pathway has a number of documented roles during wound healing and is becoming increasingly appreciated as a vital… (more)

Subjects/Keywords: TGFb; Activin; Smad; Regeneration; Scar Free Wound Healing; Leopard Gecko; Eublepharis macularius; EMT; Snail

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gilbert, R. W. D. (2013). Characterization of TGFb signaling during epimorphic tissue regeneration: an example using the leopard gecko (Eublepharis macularius) tail regeneration model. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/6609

Chicago Manual of Style (16^th Edition):

Gilbert, Richard W D. “Characterization of TGFb signaling during epimorphic tissue regeneration: an example using the leopard gecko (Eublepharis macularius) tail regeneration model.” 2013. Masters Thesis, University of Guelph. Accessed January 19, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/6609.

MLA Handbook (7^th Edition):

Gilbert, Richard W D. “Characterization of TGFb signaling during epimorphic tissue regeneration: an example using the leopard gecko (Eublepharis macularius) tail regeneration model.” 2013. Web. 19 Jan 2021.

Vancouver:

Gilbert RWD. Characterization of TGFb signaling during epimorphic tissue regeneration: an example using the leopard gecko (Eublepharis macularius) tail regeneration model. [Internet] [Masters thesis]. University of Guelph; 2013. [cited 2021 Jan 19]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/6609.

Council of Science Editors:

Gilbert RWD. Characterization of TGFb signaling during epimorphic tissue regeneration: an example using the leopard gecko (Eublepharis macularius) tail regeneration model. [Masters Thesis]. University of Guelph; 2013. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/6609

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations