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You searched for subject:(WOC). Showing records 1 – 3 of 3 total matches.

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1. Bäckström, Azarina. Samband mellan arbetsrelaterat överengagemang och återhämtning.

Degree: Psychology, 2014, Umeå University

Utifrån tidigare forskning påvisas att den psykosociala ohälsan inom arbetslivet har ökat. En förklaring till detta kan vara att det mer flexibla arbetslivet gör att arbetstagarens gränser mellan arbete och fritid suddas ut. Arbetsrelaterat överengagemang, work over-commitment (WOC), har vid tidigare studier visats ha en negativ inverkan på den psykosociala arbetsmiljön. Brist på återhämtning är en faktor som oftare nämns i samband med psykosocial ohälsa. Syftet med denna studie är att undersöka samband mellan arbetsrelaterat överengagemang och återhämtning samt om det skiljer sig åt gällande respondenter i privat respektive offentlig verksamhet. Metoden var kvantitativ och genomfördes via en webbenkät. 80 arbetstagare inom offentlig och privat verksamhet bjöds in att deltaga i studien, svarsfrekvens var 51,25%. Resultaten visar att det är små skillnader mellan grupperna avseende hur de skattar såväl arbetsrelaterat överengagemang som återhämtning. Ju mer tid för återhämtning desto lägre inverkan har arbetsrelaterat överengagemang. Korrelationsanalys visar att respondenter som ofta kommer i tidsnöd i sitt arbete och försämrad återhämtning på kort sikt har ett signifikant samband. Även hos respondenter där de närmaste säger att de offrar för mycket för arbetet fanns ett signifikant samband avseende brist på återhämtning efter en natt.

Previous research shows that health problem due to psychosocial health at work has increased. One explanation for this may be that the more flexible labor market means that the worker's boundaries between work and leisure blur. High work commitment, work over-commitment (WOC) has in previous studies been shown to have a negative impact on the psychosocial work environment. Lack of recovery is a factor often mentioned in relation to health problem due to psychosocial health. The aim of this study is to investigate the relationship between work-related overcommitment and recovery, and if there´s a difference between respondents in the private and public sectors. The study was quantitative and web questionnaire was distributed via e-mail. Invitation was send to 80 participants and the response rate was 51.25%. The results show that there are small differences between the groups regarding how they estimate both the work commitment and the recovery. The more time for recovery, the lower impact has work commitment. Correlation analysis shows that respondents who frequent lack of time in their work and increased recovery during short time has a significant correlation. Even among respondents where the relatives say they sacrifice too much for their work was a significant correlation of lack of recovery after one night.

Subjects/Keywords: WOC; work over-commitment; recovery; psychosocial health; WOC; arbetsrelaterat; överengagemang; återhämtning; psykosocial ohälsa

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

APA (6th Edition):

Bäckström, A. (2014). Samband mellan arbetsrelaterat överengagemang och återhämtning. (Thesis). Umeå University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93856

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):

Bäckström, Azarina. “Samband mellan arbetsrelaterat överengagemang och återhämtning.” 2014. Thesis, Umeå University. Accessed August 12, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93856.

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

MLA Handbook (7th Edition):

Bäckström, Azarina. “Samband mellan arbetsrelaterat överengagemang och återhämtning.” 2014. Web. 12 Aug 2020.

Vancouver:

Bäckström A. Samband mellan arbetsrelaterat överengagemang och återhämtning. [Internet] [Thesis]. Umeå University; 2014. [cited 2020 Aug 12]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93856.

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

Council of Science Editors:

Bäckström A. Samband mellan arbetsrelaterat överengagemang och återhämtning. [Thesis]. Umeå University; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-93856

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


Universitat Rovira i Virgili

2. Röser, Stephan. Mono- and dinuclear ruthenium complexes: synthesis, characterization and their impact in oxidation reactions.

Degree: Departament de Química Física i Inorgànica, 2011, Universitat Rovira i Virgili

The main topic of my thesis is the development of new Ruthenium based polypyridyl complexes, with the focus on Ru-aquo compounds. These Ru-aquo compounds present the interesting property of undergoing proton coupled electron processes. This allows such compounds to reach high oxidation states, which is a requirement in redox catalysis. Applications of interest involve the transformation of sulfites into sulfoxides (sulfoxidation) and the oxidation of water to molecular oxygen (water oxidation). At first different mononuclear ruthenium compounds containing one or two DMSO ligands are presented. The obtained findings concerning S- to O-linkage isomerization are transferred and connected to results from catalysis using Ru(H2O)-compounds as catalysts. The second field of interest concerns water oxidation. A variety of mono- and dinuclear Ru(H2O)-compounds differing in electronic and steric properties are described. These differences are connected to the catalytic activity towards water oxidation reaction. New insights in the underlying reaction mechanisms are provided, which constitute a strong basis for the development of future water oxidation catalysts. One highlight of this thesis is the introduction of mononuclear Ru(H2O)-compounds combined with a [Ru(bpy)3]2+ and a CoIII sacrificial electron acceptor, which successfully produce molecular oxygen upon light irradiation. Light driven water oxidation as anode reaction and the recombination of the electrons and protons from the oxidation process at the cathode form a device called solar fuel cell, that once fully mature may play an important role in a future renewable energy system. Advisors/Committee Members: [email protected] (authoremail), false (authoremailshow), Llobet Dalmases, Antoni (director), true (authorsendemail).

Subjects/Keywords: Ruthenium; Water oxidation; WOC; Redox catalysis; Sulfoxidation; Linkage; 01; 546

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

APA (6th Edition):

Röser, S. (2011). Mono- and dinuclear ruthenium complexes: synthesis, characterization and their impact in oxidation reactions. (Thesis). Universitat Rovira i Virgili. Retrieved from http://hdl.handle.net/10803/34758

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):

Röser, Stephan. “Mono- and dinuclear ruthenium complexes: synthesis, characterization and their impact in oxidation reactions.” 2011. Thesis, Universitat Rovira i Virgili. Accessed August 12, 2020. http://hdl.handle.net/10803/34758.

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

MLA Handbook (7th Edition):

Röser, Stephan. “Mono- and dinuclear ruthenium complexes: synthesis, characterization and their impact in oxidation reactions.” 2011. Web. 12 Aug 2020.

Vancouver:

Röser S. Mono- and dinuclear ruthenium complexes: synthesis, characterization and their impact in oxidation reactions. [Internet] [Thesis]. Universitat Rovira i Virgili; 2011. [cited 2020 Aug 12]. Available from: http://hdl.handle.net/10803/34758.

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

Council of Science Editors:

Röser S. Mono- and dinuclear ruthenium complexes: synthesis, characterization and their impact in oxidation reactions. [Thesis]. Universitat Rovira i Virgili; 2011. Available from: http://hdl.handle.net/10803/34758

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


Freie Universität Berlin

3. Pudollek, Susanne. Multifrequency EPR and ENDOR spectroscopy of the S2-state of the manganese complex in photosystem II.

Degree: 2012, Freie Universität Berlin

Plants, green algae and cyanobacteria alike use oxygenic photosynthesis to transform harvested light into chemical energy. The oxygen which is released from oxidised water molecules forms the basis of animal and human life. The reaction cycle of catalytic dissociation of the water molecules takes place within a large protein complex called Photosystem II (PSII). Its catalytic center is the WaterOxidizing Complex (WOC) comprising four manganese and a calcium ion. The underlying reaction mechanism is not yet understood. The requisite for the development of appropriate models to explain its behavior is an accurate knowledge of its structure and physical/chemical properties in every step of the catalytic cycle. Electron Paramagnetic Resonance (EPR) and related methods employ the interaction between unpaired electrons in an external magnetic field by measurement of their spin state’s energy splitting. The observed energy differences carry information about the paramagnetic center and its immediate surrounding. Hence, this method is perfectly suited to selectively investigate the paramagnetic S2-state of the WOC within PSII. Initially, the capabilities and benefits of multi-frequency EPR and ENDOR were demonstrated on a di-manganese model system, Mn-Catalase, studying its characteristics and magnetic parameters. These methods then were transferred onto the WOC S2-state in native PSII from cyanobacterium Thermosynechococcus elongatus and onto the same system, but grown in nutrient containing strontium exclusively, which is the only known functional replacement for calcium. In comparison to native PSII, the S2-state of PSII-Sr exhibits changes in its EPR and ENDOR spectra. To date, these are insufficiently characterized. By means of multi-frequency EPR and ENDOR investigation of both systems in solution, their properties could be determined. Q-band EPR and 55Mn-ENDOR spectroscopy on native PSII crystals allowed for an assignment not only of the fundamental components of the 55Mn hyperfine couplings, but also of their orientations within the crystal frame. In analogy to structural motives from said di- manganese model systems, correlations between magnetic parameters and local structural characteristics could be found. Q-band 1H-ENDOR spectroscopy on S2-state in solution and in crystal permitted the characterization of nearby protons coupled to the WOC, where the three largest couplings could be oriented within the crystal frame. With the aid of theoretical structure models of the WOC in its S2-state, an assignment of selected 1H hyperfine couplings to actual WOC ligating protons was postulated. Advisors/Committee Members: [email protected] (contact), w (gender), Prof. Dr. Robert Bittl (firstReferee), Prof. Dr. Holger Dau (furtherReferee).

Subjects/Keywords: EPR; ENDOR; photosystem II; PSII; Mn-Catalase; photosynthesis; WOC; water-oxidizing complex; 500 Naturwissenschaften und Mathematik::530 Physik

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

APA (6th Edition):

Pudollek, S. (2012). Multifrequency EPR and ENDOR spectroscopy of the S2-state of the manganese complex in photosystem II. (Thesis). Freie Universität Berlin. Retrieved from http://dx.doi.org/10.17169/refubium-13149

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):

Pudollek, Susanne. “Multifrequency EPR and ENDOR spectroscopy of the S2-state of the manganese complex in photosystem II.” 2012. Thesis, Freie Universität Berlin. Accessed August 12, 2020. http://dx.doi.org/10.17169/refubium-13149.

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

MLA Handbook (7th Edition):

Pudollek, Susanne. “Multifrequency EPR and ENDOR spectroscopy of the S2-state of the manganese complex in photosystem II.” 2012. Web. 12 Aug 2020.

Vancouver:

Pudollek S. Multifrequency EPR and ENDOR spectroscopy of the S2-state of the manganese complex in photosystem II. [Internet] [Thesis]. Freie Universität Berlin; 2012. [cited 2020 Aug 12]. Available from: http://dx.doi.org/10.17169/refubium-13149.

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

Council of Science Editors:

Pudollek S. Multifrequency EPR and ENDOR spectroscopy of the S2-state of the manganese complex in photosystem II. [Thesis]. Freie Universität Berlin; 2012. Available from: http://dx.doi.org/10.17169/refubium-13149

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

.