Results 221 to 230 of about 31,710 (279)

Electrostatic Control of Photoisomerization in Channelrhodopsin 2.

Journal of the American Chemical Society, 2021
Channelrhodopsin 2 (ChR2) is the most commonly used tool in optogenetics. Because of its faster photocycle compared to wild-type (WT) ChR2, the E123T mutant of ChR2 is a useful optogenetic tool when fast neuronal stimulation is needed.
Ruibin Liang, Jimmy K. Yu, J. Meisner, F. Liu, T. Martínez   +4 more
semanticscholar   +1 more source

Photoisomerization of Saccharin

The Journal of Organic Chemistry, 2013
Most known applications of saccharin and saccharyl derivatives and their potential for new uses rely on the thermal and photochemical stability of the saccharyl system. Here, we show that saccharin undergoes structural rearrangement when subjected to a narrow-band ultraviolet irradiation.
Duarte, L., Reva, I. D., Cristiano, Maria Lurdes Santos, Fausto, R.   +3 more
openaire   +3 more sources

Photoisomerization in Rhodopsin

Biochemistry (Moscow), 2001
This article reviews the primary reaction processes in rhodopsin, a photoreceptive pigment for twilight vision. Rhodopsin has an 11-cis retinal as the chromophore, which binds covalently with a lysine residue through a protonated Schiff base linkage.
H, Kandori, Y, Shichida, T, Yoshizawa
openaire   +2 more sources

Photoisomerization Activated Intramolecular Charge-Transfer Process for Broadband Tunable Single-Mode Microlasers.

Angewandte Chemie, 2020
Miniaturized lasers with high spectral purity and wide wavelength tunability are crucial for various photonic applications. Here we propose a strategy to realize broadband tunable single-mode lasing based on photoisomerization activated intramolecular ...
Chan Qiao, Chunhuan Zhang, Zhonghao Zhou, Haiyun Dong, Yuxiang Du, Jiannian Yao, Y. Zhao   +6 more
semanticscholar   +1 more source

Ergosterol Photoisomerization Reaction Scheme

Journal of Pharmaceutical Sciences, 1973
The kinetics of the various isomers formed at low temperature by UV irradiation of ergosterol were studied experimentally at the wavelength λ = 253.7 nm. The characteristics of the photostationary state were used to determine the isomer precursor of the toxisterols as well as the quantum transformation yields of one isomer into another.
R, Mermet-Bouvier, E, Abillon
openaire   +2 more sources

Photoisomerization kinetics of trifloxystrobin

Analytical and Bioanalytical Chemistry, 2005
The photoisomerization kinetics of trifloxystrobin (TFS) in acetone under artificial sunlight is reported. HPLC analysis showed the TFS, a strobilurine fungicide of EE conformation, was converted into an equilibrium mixture of four isomers after illumination for 7 h.
Kaushik, Banerjee, Axel Patrick, Ligon, Michael, Spiteller   +2 more
openaire   +2 more sources

Optimal Control of Photoisomerization

Physical Review Letters, 2005
We report on optimal control of the photoisomerization of 3,3-diethyl-2,2-thiacyanine iodide dissolved in methanol. Enhancement and reduction of the relative yield of cis to trans isomers are achieved; i.e., the quantum efficiency of the photoisomerization is controlled with optimally phase and amplitude shaped 400 nm femtosecond laser pulses.
G, Vogt, G, Krampert, P, Niklaus, P, Nuernberger, G, Gerber   +4 more
openaire   +2 more sources

Controlling Molecular Photoisomerization in Photonic Cavities through Polariton Funneling.

Journal of the American Chemical Society
Strong coupling between photonic modes and molecular electronic excitations, creating hybrid light-matter states called polaritons, is an attractive avenue for controlling chemical reactions.
Inki Lee, Sarah R Melton, Ding Xu, M. Delor   +3 more
semanticscholar   +1 more source

THE PHOTOISOMERIZATION OF RETINAL*

Photochemistry and Photobiology, 1970
Abstract— –Quantum efficiencies have been measured for the photoisomerization of four stereoisomers of retinal (all‐trans, 13‐cis, 11 cis, and 9‐cis) in two solvents at different wavelengths of irradiation and at various temperatures. In heane at 25°C the quantum efficiencies for isomerization at 365 nm are: 9‐cis to trans, 0.5; 13‐cis to trans, 0.4 ...
A, Kropf, R, Hubbard
openaire   +2 more sources

Photoisomerization of polybutadiene

Journal of Polymer Science Part C: Polymer Symposia, 1967
AbstractPolybutadiene, in the solid state, and in the absence of added sensitizer, undergoes photochemical cis‐trans isomerization and loss of unsaturation when irradiated in vacua with krypton 1236 A. or mercury 2537 A. radiation. The estimated quantum yields for these two reactions are 0.25 and 1.53, respectively, for the krypton irradiations, and 0 ...
M. A. Golub, C. L. Stephens
openaire   +1 more source