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University of Guelph

1. Jigmeddorj, Badamsambuu. Nuclear Structure of \(^{122}Xe\) Studied via High-Statistics \(\beta^+/EC\) Decay of \(^{122}Cs\).

Degree: PhD, Department of Physics, 2019, University of Guelph

The Xe isotopes are located at a possible phase change in the collective structure from vibrational to rotational. The Xe isotopes therefore were considered as potential candidates for (γ)-soft nuclei or (O(6)) symmetry limit within the IBM. However, testing of the O(6) symmetry in Xe reveals that indeed their structure is more complicated. The study of the nucleus (122Xe) is a part of a systematic examination of the development of collectivity in the Xe isotopes, which are located in the (Z>50), (N<82) region that display an extraordinarily smooth evolution of simple collective signatures. In order to probe the development of collectivity in greater detail, additional information on excited states is required. Specifically, the knowledge of excited states that decay to other excited states resulting low-energy transitions which can give strong indicators of the underlying structure need to be improved . The experiment to study (122Xe) with the (β+/EC) decay of (122Cs) was performed at the TRIUMF-ISAC facility located in Vancouver, B.C., Canada. Radioactive (122Cs) beams from the ISAC facility were delivered to the 8(π) spectrometer which was composed of 20 HPGe detectors. The isomeric and ground states of (122Cs) decay to the (122Xe) with half lives of 21 seconds and a 3.7 minutes, respectively. Two sets of high-statistics data for short- and long-half-life decays were collected to have an access for potential excited states of the (122Xe). As an evidence of data quality, the level scheme of (122Xe) has been dramatically extended by 177 new levels and 482 new transitions. Using (γ)-(γ) angular correlation analysis, 71 spin assignments have been made for 55 levels since a spin of some levels could be assigned via several different cascades. Mixing ratios for 44 (γ)-ray transitions were extracted from the angular correlation analysis by extracting the values from the minimized (χ2) fit. Branching ratios have been determined for all observed transitions independently in the two different data sets collected with the short and long cycled runs. The data have been compared with a sd-IBM-1 calculation. Advisors/Committee Members: Garrett, Paul (advisor).

Subjects/Keywords: Xe-122; beta decay; nuclear structure; Angular Correlation Analysis; level scheme; branching ratios; IBM1; Relative B(E2); Spin assignment

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

APA (6th Edition):

Jigmeddorj, B. (2019). Nuclear Structure of \(^{122}Xe\) Studied via High-Statistics \(\beta^+/EC\) Decay of \(^{122}Cs\). (Doctoral Dissertation). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/15852

Chicago Manual of Style (16th Edition):

Jigmeddorj, Badamsambuu. “Nuclear Structure of \(^{122}Xe\) Studied via High-Statistics \(\beta^+/EC\) Decay of \(^{122}Cs\).” 2019. Doctoral Dissertation, University of Guelph. Accessed April 16, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/15852.

MLA Handbook (7th Edition):

Jigmeddorj, Badamsambuu. “Nuclear Structure of \(^{122}Xe\) Studied via High-Statistics \(\beta^+/EC\) Decay of \(^{122}Cs\).” 2019. Web. 16 Apr 2021.

Vancouver:

Jigmeddorj B. Nuclear Structure of \(^{122}Xe\) Studied via High-Statistics \(\beta^+/EC\) Decay of \(^{122}Cs\). [Internet] [Doctoral dissertation]. University of Guelph; 2019. [cited 2021 Apr 16]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/15852.

Council of Science Editors:

Jigmeddorj B. Nuclear Structure of \(^{122}Xe\) Studied via High-Statistics \(\beta^+/EC\) Decay of \(^{122}Cs\). [Doctoral Dissertation]. University of Guelph; 2019. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/15852


University of Georgia

2. Park, Younghee. Insight from NMR observations on glycosaminoglycan interactions with the Link module of TSG-6.

Degree: 2016, University of Georgia

Tumor necrosis factor stimulated gene-6 (TSG-6) is a glycosaminoglycan (GAG) binding protein expressed in inflammatory diseases and inflammatory-like processes. The Link module, one domain of TSG-6, is well known for its interactions with hyaluronan (HA), which play important roles in protecting against cartilage matrix destruction during inflammation and stabilizing the HA-rich extracellular matrix (ECM) during ovulation. Interactions with HA, and to some extent heparin/heparan sulfate (Hp/HS), have been structurally studied, indicating that HA and Hp/HS interact with the Link module at totally different binding sites. However, its interactions with chondroitin sulfate (CS) have yet to be adequately described. In this thesis, we isolated a well-defined homogeneous hexasaccharides of CS using enzymatic digestions followed by chromatographic separation and determined their structures using Nuclear Magnetic Resonance (NMR) methods. A spin-labeled analog of a CS hexasaccharide was synthesized as well. These, in turn, were used in further binding studies with the Link module. The interactions between the Link module and CSs were monitored by NMR chemical shift perturbation (CSP), suggesting possible CS binding sites and multiple binding modes for the Link module. The production of a Link dimer during the binding process was confirmed by measuring relaxation rates of 15N sites in the Link module as well as by dynamic light scattering (DLS) measurements. Paramagnetic relaxation enhancement (PRE) data from 1H-15N heteronuclear single quantum coherence (HSQC) spectra of the Link module in the absence and presence of the spin labeled analog of CS added to binding site definition. A solution structure of the induced dimer of the Link module was produced, using triple resonance assignment methods for NMR resonance assignments and Nuclear Overhause Effect (NOE) and Residual Dipolar Coupling (RDC) data for structural constraints. Finally, a dimer model of Link module with the 4,4,4 sulfated, TEMPO adduct of a CS hexasaccharide bound was generated using CSP, PRE, and RDC restraints in docking program (HADDOCK). This provides insights into the cross-linking of CS in the ECM that can play an additional role in the remodeling and stabilization of the ECM during inflammation.

Subjects/Keywords: TSG-6; Link module; Glycosaminoglycans; Chondroitins sulfate; NMR spectroscopy; Size-exclusion chromatography; Strong anion exchange chromatography; Mass spectrometry; Triple resonance assignment; Residual dipolar coupling; Spin relaxation; Chemical shift perturbation; Paramagnetic relaxation enhancement; TEMPO; HADDOCK; Protein-ligand docking

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

APA (6th Edition):

Park, Y. (2016). Insight from NMR observations on glycosaminoglycan interactions with the Link module of TSG-6. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/34548

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

Chicago Manual of Style (16th Edition):

Park, Younghee. “Insight from NMR observations on glycosaminoglycan interactions with the Link module of TSG-6.” 2016. Thesis, University of Georgia. Accessed April 16, 2021. http://hdl.handle.net/10724/34548.

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

MLA Handbook (7th Edition):

Park, Younghee. “Insight from NMR observations on glycosaminoglycan interactions with the Link module of TSG-6.” 2016. Web. 16 Apr 2021.

Vancouver:

Park Y. Insight from NMR observations on glycosaminoglycan interactions with the Link module of TSG-6. [Internet] [Thesis]. University of Georgia; 2016. [cited 2021 Apr 16]. Available from: http://hdl.handle.net/10724/34548.

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

Council of Science Editors:

Park Y. Insight from NMR observations on glycosaminoglycan interactions with the Link module of TSG-6. [Thesis]. University of Georgia; 2016. Available from: http://hdl.handle.net/10724/34548

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

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