Structural Changes in the Schiff Base Region of Squid Rhodopsin upon Photoisomerization Studied by Low-Temperature FTIR Spectroscopy†

Biochemistry ◽  
2006 ◽  
Vol 45 (9) ◽  
pp. 2845-2851 ◽  
Author(s):  
Toru Ota ◽  
Yuji Furutani ◽  
Akihisa Terakita ◽  
Yoshinori Shichida ◽  
Hideki Kandori
Keyword(s):  
Schiff Base ◽  
Low Temperature ◽  
Ftir Spectroscopy ◽  
Structural Changes ◽  
Base Region

Structural Changes of Water in the Schiff Base Region of Bacteriorhodopsin:  Proposal of a Hydration Switch Model†

Biochemistry ◽  
2003 ◽  
Vol 42 (8) ◽  
pp. 2300-2306 ◽  
Author(s):  
Taro Tanimoto ◽  
Yuji Furutani ◽  
Hideki Kandori
Keyword(s):  
Schiff Base ◽  
Structural Changes ◽  
Base Region

Conductivity Studies of Schiff Base Ligands Derived from O-Phenylenediamine and Their Co(II) and Zn(II) Complexes

2015 ◽  
Vol 12 (2) ◽  
pp. 13
Author(s):  
Muhamad Faridz Osman ◽  
Karimah Kassim
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Impedance Spectroscopy ◽  
Ftir Spectroscopy ◽  
Coordination Complexes ◽  
Frequency Range ◽  
Schiff Base Ligands

The coordination complexes of Co(II) and Zn(II) with Schiff bases derived from o-phenylenediamine and substituted 2-hydroxybenzaldehyde were prepared All compounds were characterized by Fourier transform infrared (FTIR) spectroscopy and Nuclear magnetic resonance (NMR) spectroscopy elemental analyzers. They were analyzed using impedance spectroscopy in the frequency range of 100Hz-1 MHz. LI and L2 showed higher conductivity compared to their metal complexes, which had values of 1.3 7 x 10-7 and 6.13 x 10-8 S/cm respectively. 

scholarly journals Thermal Stress, Aggregation of Chlorophyll-Protein Complexes, and Light-Dependent Recovery of PSII activity in Wheat Seedlings

2021 ◽  
Vol 68 (5) ◽  
pp. 867-872
Author(s):  
M. S. Khristin ◽  
T. N. Smolova ◽  
V. D. Kreslavski
Keyword(s):  
Low Temperature ◽  
Structural Changes ◽  
Protein Complexes ◽  
Red Light ◽  
Photochemical Activity ◽  
Wheat Seedlings ◽  
Psii Activity ◽  
Temperature Spectra ◽  
Chlorophyll Protein Complexes ◽  
Chlorophyll Protein

Abstract The dynamics of changes in the photochemical activity of photosystem II (PSII) and low-temperature spectra at 77 K in the first leaves of 11-day winter wheat plants Triticum aestivum L., as well as structural changes in chlorophyll-protein complexes (CPC) of thylakoid membranes during recovery after a short-term (20 min) heating at a temperature of 42°C, were studied. Changes in the Fv/Fm, F735/F695, and F735/F685 ratios indicate inhibition of PSII immediately after heating. Using nondenaturing electrophoresis, it was shown that the light-harvesting Chl a/b complex of PSII does not aggregate immediately after heating but after several hours, after 6 h the desagregation of CPC was observed, which was consistent with an increase in the Fv/Fm ratio upon recovery. The influence of temperature, intensity, and quality of light (white, blue, and red light) on the recovery of PSII activity and low-temperature fluorescence spectra was studied. It was concluded that the recovery is a photo-activated low-energy process, independent of photosynthesis, and the most effective in blue light.

Cis–trans isomerization equilibrium in hydroquinone in low-temperature argon and xenon matrices studied by FTIR spectroscopy

2002 ◽  
Vol 356 (1-2) ◽  
pp. 133-139 ◽  
Author(s):  
Nobuyuki Akai ◽  
Satoshi Kudoh ◽  
Masao Takayanagi ◽  
Munetaka Nakata
Keyword(s):  
Low Temperature ◽  
Ftir Spectroscopy ◽  
Trans Isomerization

scholarly journals Structural Changes Due to the Deprotonation of the Proton Release Group in the M-Photointermediate of Bacteriorhodopsin as Revealed by Time-Resolved FTIR Spectroscopy†

Biochemistry ◽  
2008 ◽  
Vol 47 (44) ◽  
pp. 11598-11605 ◽  
Author(s):  
Joel E. Morgan ◽  
Ahmet S. Vakkasoglu ◽  
Johan Lugtenburg ◽  
Robert B. Gennis ◽  
Akio Maeda
Keyword(s):  
Ftir Spectroscopy ◽  
Structural Changes ◽  
Proton Release ◽  
Time Resolved ◽  
Release Group

scholarly journals Molecular Structural Changes in Alfalfa Detected by ATR-FTIR Spectroscopy in Response to Silencing of TT8 and HB12 Genes

2018 ◽  
Vol 19 (4) ◽  
pp. 1046 ◽  
Author(s):  
Yaogeng Lei ◽  
Abdelali Hannoufa ◽  
David Christensen ◽  
Haitao Shi ◽  
Luciana Prates ◽  
...  
Keyword(s):  
Ftir Spectroscopy ◽  
Structural Changes
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