搜索结果: 31-45 共查到“知识库 光化学”相关记录650条 . 查询时间(0.573 秒)
Some Speculations Concerning the Evolution of Photosynthetic Function
reaction center kinetic perfection
2016/5/23
Following a brief review of the light-driven reactions in photosynthetic membranes, two questions are addressed. (1) Why is the first charge separation reaction in photosynthetic reaction centers so f...
Re-engineering Photosynthetic Reaction Centers
Re-engineering Photosynthetic Reaction Centers
2016/5/23
The properties of photosynthetic reaction centers which make them interesting for technological applications are reviewed. Protein engineering has been used to systematically modify the oxidation pote...
Studies of Crystalline Aggregates of Pheophorbide and Bacteriopheophorbide by Electro-Absorption (Stark Effect) Spectroscopy and Powder X-ray Diffraction
GYROTRON 2ND HARMONIC SUBMILLIMETER WAVE
2016/5/23
Absorption and electro-absorption (Stark effect) spectra of polycrystalline and lyophillized samples of pheophorbides and bacteriopheophorbides have been measured in order to obtain information on the...
Photochemical Hole-burning Spectroscopy of Bovine Rhodopsin and Bacteriorhodopsin
Photochemical Hole Spectroscopy Bovine Rhodopsin Bacteriorhodopsin
2016/5/23
Photochemical hole burning has been observed at 1.5 K in bacteriorhodopsin (bR) and bovine rhodopsin at wavelengths spanning their lowest energy electronic absorption bands. Hole widths were approxima...
Rapid-flow Resonance Raman Spectroscopy of Bacterial Photosynthetic Reaction Centers
Rhodobacter sphaeroides Photosynthetic Reaction Center Complex Proteins Spectrum Analysis, Raman Kinetics Photochemistry
2016/5/23
Rapid-flow resonance Raman vibrational spectra of bacterial photosynthetic reaction centers from the R-26 mutant of Rhodobacter sphaeroides have been obtained by using excitation wavelengths (810-910 ...
Electroabsorption (Stark Effect) Spectroscopy of Mono-and Biruthenium Charge-Transfer Complexes:Measurements of Changes in Dipole Moments and Other Electrooptic Properties
PERVAPORATION REVERSE OSMOSIS SEPARATION OF AMYL ALCOHOL WATER MIXTURES POLY(VINYL ALCOHOL) POLYACRYLONITRILE COMPOSITE MEMBRANES POLYAMIDE POLYETHERSULFONE COMPOSITE MEMBRANES
2016/5/23
Electroabsorption (Stark effect) spectra are reported for the charge-transfer transitions of (NH3)5RuL2+ and [(NH3)5Ru]2L4+,5+, where L is pyrazine (pz) or 4,4'-bipyridine (4,4'-bpy). The spectra perm...
Electric Field Effects on Emission Line Shapes when Electron Transfer Competes with Emission:an Example from Photosynthetic Reaction Centers
RHODOBACTER-SPHAEROIDES R-26 PRIMARY CHARGE SEPARATION RHODOPSEUDOMONAS-VIRIDIS BACTERIAL PHOTOSYNTHESIS FEMTOSECOND SPECTROSCOPY PROTEIN SUBUNITS 3A RESOLUTION PRIMARY DONOR SPECTRA
2016/5/23
Electron-transfer reactions are expected to be particularly sensitive to externally applied electric fields because of the presence of charge-separated, dipolar states, and the effects of the field on...
Electrochromism in the Near-Infrared Absorption Spectra of Bridged Ruthenium Mixed-Valence Complexes
inorganic, organic, physical and analytical chemistry ruthenium complexes absorption spectra electrochromism electric fields experimental data low temperature measuring methods near infrared radiation complexes
2016/5/23
Many experimental and theoretical approaches have been developed to characterize the chemical and physical properties of mixed-valence complexes. These molecules may possess metals in differing oxidat...
Electric Field Effects on the Initial Electron-Transfer Kinetics in Bacterial Photosynthetic Reaction Centers
solar energy inorganic, organic, physical and analytical chemistry photosynthetic reaction centers electron transfer calculation methods electric fields kinetics low temperature photochemistry chemistry 140500* -- solar energy conversion
2016/5/23
The effect of an applied electric field on the kinetics of the initial picosecond electron-transfer reaction in Rb. sphaeroides reaction centers has been measured in isotropic samples at 77 K. The net...
Chimeric Rescue of Rb. capsulatus Reaction Center Genes with Sequences from Rb.sphaeroides
Chimeric Rescue Rb. capsulatus Reaction Center Genes Rb.sphaeroides
2016/5/23
Site-directed mutagenesis is becoming a very important technique in the study of photosynthetic reaction center structure-function relationships. However, there are certain disadvantages associated wi...
Multi-nuclear NMR Studies of DNA Hairpins:2.Sequence-Dependent Structural Variations
GERMANIUM DETERMINATION HYDRIDE GENERATION INDUCTIVELY COUPLED PLASMA EMISSION SPECTROMETRY MEDICINAL PLANT
2016/5/20
The solution conformation of three related DNA hairpins, each with five bases in the loop, is investigated by proton and phosphorus 2D NMR methods. The sequences of the three oligomers are d(CGCGTTGTT...
Stark Effect Spectra of Ru(Diimine)32+ Complexes
ANTIDEPRESSANTS MONOAMINE OXIDASE INHIBITORS TYRAMINE
2016/5/20
The metal-to-ligand charge-transfer (MLCT) states of Ru- (diimine)32+and related complexes have been the subject of intense interest over the past 20 years in an effort to understand and potentially t...
Photochemical Hole-burning in Photosynthetic Reaction Centers
Photochemical Hole-burning Photosynthetic Reaction Centers
2016/5/20
The change in absorbance (hole spectrum) of the primary electron donor (P870) in bacterial photosynthetic reaction centers has been studied at 1.5-2.1 K following narrow-band excitation at several wav...
Investigation of the Lowest Triplet State of the Pyrochlorophyllide a-Apomyoglobin Complex by Zero-field Optically Detected Magnetic Resonance
Lowest Triplet State Pyrochlorophyllide a-Apomyoglobin Complex Zero-field Optically Detected Magnetic Resonance
2016/5/20
Investigation of the Lowest Triplet State of the Pyrochlorophyllide a-Apomyoglobin Complex by Zero-field Optically Detected Magnetic Resonance.
On the Refractive Index Correction In Luminescence Spectroscopy
Refractive Index Correction Luminescence Spectroscopy
2016/5/20
On the Refractive Index Correction In Luminescence Spectroscopy.