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

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1. Guo, Zhanjun. Trapping internal water clusters and hydrogen-bonding networks in photosynthetic oxygen evolution.

Degree: PhD, Chemistry and Biochemistry, 2018, Georgia Tech

To summarize the work presented in this thesis, I have investigated the structure and function of the internal hydrogen-bonding network in PSII in three different ways. In the first (Chapter 2), I used an infrared signal from a protonated water cluster in the S2 state of the OEC. When trapped at 190 K, solvent isotope exchange confirmed the spectral assignment to the internal water network. This signal then became a novel and effective probe of the effects of hydrogen bond disruption, calcium depletion and replacement, and pH change on the network. In the second (Chapter 3), I used EPR spectroscopy at 190 K to investigate the effects of these treatments on the EPR signal and decay rate of YZ radical. The radical was trapped in the S2 state and decayed by coupled proton and electron transfer through recombination with QA−. A correlation was discovered between the intensity of the protonated water cluster and conditions that altered YZ radical decay rates. In the third (Chapter 4), I used reaction induced FT-IR spectroscopy to obtain structural information concerning YZ radical and YZ singlet in the S2 state. Calcium depletion and replacement was employed. This third approach provides a new high-resolution method to define the structure of the radical and singlet state in the presence of an intact metal cluster. Advisors/Committee Members: Barry, Bridgette A. (advisor), Lieberman, Raquel L. (committee member), Kelly, Wendy L. (committee member), Oyelere, Adegboyega K. (committee member), Schmidt-Krey, Ingeborg (committee member).

Subjects/Keywords: Photosystem II; Oxygen evolving complex; YZ

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APA (6th Edition):

Guo, Z. (2018). Trapping internal water clusters and hydrogen-bonding networks in photosynthetic oxygen evolution. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/61108

Chicago Manual of Style (16th Edition):

Guo, Zhanjun. “Trapping internal water clusters and hydrogen-bonding networks in photosynthetic oxygen evolution.” 2018. Doctoral Dissertation, Georgia Tech. Accessed September 22, 2020. http://hdl.handle.net/1853/61108.

MLA Handbook (7th Edition):

Guo, Zhanjun. “Trapping internal water clusters and hydrogen-bonding networks in photosynthetic oxygen evolution.” 2018. Web. 22 Sep 2020.

Vancouver:

Guo Z. Trapping internal water clusters and hydrogen-bonding networks in photosynthetic oxygen evolution. [Internet] [Doctoral dissertation]. Georgia Tech; 2018. [cited 2020 Sep 22]. Available from: http://hdl.handle.net/1853/61108.

Council of Science Editors:

Guo Z. Trapping internal water clusters and hydrogen-bonding networks in photosynthetic oxygen evolution. [Doctoral Dissertation]. Georgia Tech; 2018. Available from: http://hdl.handle.net/1853/61108


Brno University of Technology

2. Svoboda, Tomáš. Jednoválcové motory kategorie enduro: Single cylinder engines enduro category.

Degree: 2019, Brno University of Technology

Bachelor thesis deals with the description of typical enduro motorcycle engine and describes its main parts. Next volume concern about chosen types of enduro motorcycles and its en-gines. Achievement of every single engine is shown in dynamometric diagrams. Maintenance schedule which is affected by given achievements is shown in tables. The engines of enduro motorcycles have been partly compared with motocross motorcycle engines Advisors/Committee Members: Vančura, Jan (advisor), Beran, Martin (referee).

Subjects/Keywords: Enduro; motocykl; Mezinárodní motocyklová šestidenní; motokros; klikový hřídel; spojka; ventily; DOHC; rozvodový mechanismus; vačkový hřídel; karburátor; WR 450F; DR-Z 400E; 250 EXC-F; CR-F 450X; YZ 450F; CR-F 450R; Keihin FCR39; Enduro; motorcycle; International six days enduro; motocross; crankshaft; clutch; valves; DOHC; timing mechanism; camshaft; carburetor; dynamometric diagram; WR 450F; DR-Z 400E; 250 EXC-F; CR-F 450X; YZ 450F; CR-F 450R; Keihin FCR39

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

APA (6th Edition):

Svoboda, T. (2019). Jednoválcové motory kategorie enduro: Single cylinder engines enduro category. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/6371

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):

Svoboda, Tomáš. “Jednoválcové motory kategorie enduro: Single cylinder engines enduro category.” 2019. Thesis, Brno University of Technology. Accessed September 22, 2020. http://hdl.handle.net/11012/6371.

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

MLA Handbook (7th Edition):

Svoboda, Tomáš. “Jednoválcové motory kategorie enduro: Single cylinder engines enduro category.” 2019. Web. 22 Sep 2020.

Vancouver:

Svoboda T. Jednoválcové motory kategorie enduro: Single cylinder engines enduro category. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2020 Sep 22]. Available from: http://hdl.handle.net/11012/6371.

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

Council of Science Editors:

Svoboda T. Jednoválcové motory kategorie enduro: Single cylinder engines enduro category. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/6371

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

3. Keough, James M. Redox active tyrosines in photosystem II: role in proton coupled electron transfer reactions.

Degree: PhD, Chemistry and Biochemistry, 2013, Georgia Tech

Proton coupled electron transfer reactions often involve tyrosine residues, because when oxidized, the phenolic side chain deprotonates. Tyrosine Z (YZ) is responsible for extracting electrons in a stepwise fashion from the oxygen evolving-complex in order to build enough potential to oxidize water. This process requires that each step YZ must deprotonate and reprotonate in order to maintain the high midpoint potential that is necessary to oxidize the oxygen-evolving complex, which makes YZ highly involved in proton coupled electron transfer reactions. In this thesis YZ has been studied within oxygen-evolving photosystem II utilizing electron paramagnetic resonance spectroscopy to monitor the tyrosyl radical that is formed upon light excitation. Kinetic analysis of YZ has shed light on the factors that are important for PSII to carry out water oxidation at the oxygen-evolving complex. Most notably the strong hydrogen-bonding network and the midpoint potential of YZ have been shown to be integral aspects of the water splitting reactions of PSII. By studying YZ within oxygen-evolving PSII, conclusions are readily applied to the native system. Advisors/Committee Members: Bridgette A. Barry (Committee Chair), Adegboyega K. Oyelere (Committee Member), Facundo Fernandez (Committee Member), Ingeborg Schmidt-Krey (Committee Member), Mostafa El-Sayed (Committee Member).

Subjects/Keywords: Photosystem II; Proton coupled electron transfer reactions; Tyrosine Z; Tyrosine D; YZ; YD; Water oxidation; Photosynthesis; Power resources Research; Photosynthetic reaction centers

…model for YZ PCET reactions in oxygen-evolving preparations of PSII. ................. 13… …PSII at 1.9 Å. (B) Hydrogen-bonding environment surrounding YZ. (C)… …monitor kinetics. (B) Representative EPR transients reflecting the decay of YZ • at… …YZ• recombination in the S2 state at 190 K. Data were acquired either in 1H2O (black… …effect for YZ• recombination, derived from the data in (B). ............. 33 CHAPTER… 

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

APA (6th Edition):

Keough, J. M. (2013). Redox active tyrosines in photosystem II: role in proton coupled electron transfer reactions. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/47738

Chicago Manual of Style (16th Edition):

Keough, James M. “Redox active tyrosines in photosystem II: role in proton coupled electron transfer reactions.” 2013. Doctoral Dissertation, Georgia Tech. Accessed September 22, 2020. http://hdl.handle.net/1853/47738.

MLA Handbook (7th Edition):

Keough, James M. “Redox active tyrosines in photosystem II: role in proton coupled electron transfer reactions.” 2013. Web. 22 Sep 2020.

Vancouver:

Keough JM. Redox active tyrosines in photosystem II: role in proton coupled electron transfer reactions. [Internet] [Doctoral dissertation]. Georgia Tech; 2013. [cited 2020 Sep 22]. Available from: http://hdl.handle.net/1853/47738.

Council of Science Editors:

Keough JM. Redox active tyrosines in photosystem II: role in proton coupled electron transfer reactions. [Doctoral Dissertation]. Georgia Tech; 2013. Available from: http://hdl.handle.net/1853/47738

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