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Quantitative,Directional Measurement of Electric Field Heterogeneity Within an Enzyme Active Site
Quantitative Directional Measurement Electric Field Heterogeneity Enzyme Active Site
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2016/5/25
Extensive structural studies of enzymes have revealed that biological catalysis occurs within sequestered active site crevices, where reacting substrates are surrounded by an anisotropic and chemicall...
Site-Specific Conversion of Cysteine Thiols into Thiocyanate Creates an IR Probe for Electric Fields in Proteins
food packaging perfluorinated dietary intake human exposure
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2016/5/24
The nitrile stretching mode of the thiocyanate moiety is a nearly ideal probe for measuring the local electric field arising from the organized environment of the interior of a protein. Nitriles were ...
Vibrational Stark Effects Calibrate the Sensitivity of Vibrational Probes for Electric Fields in Proteins
transitional cell carcinoma cDNA microarray molecular markers expression profiling tumor classification
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2016/5/24
Infrared spectroscopy is widely used to probe local environments and dynamics in proteins. The introduction of a unique vibration at a specific site of a protein or more complex assembly offers many a...
Electric Field Effects in Multicomponent Fluid Lipid Membranes
melatonin impurities bulk drug substance analytical methods impurity profile residual solvent stability purity
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2016/5/23
A thermodynamic model of multicomponent fluid membranes under the influence of lateral forces is described. Membrane components are characterized by their effective molecular areas, molecular charges,...
Electric Field-Induced Critical Demixing in Lipid Bilayer Membranes
Cardiolipins Electric Stimulation Electricity Fluorescent Dyes Lipid Bilayers Membranes, Artificial Microscopy, Fluorescence Models, Chemical Models, Molecular hosphatidylcholines Phosphatidylethanolamines Thermodynamics
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2016/5/23
Electric fields can induce lateral reorganization of lipids in fluid bilayer membranes. The resulting concentration profiles readily are observed in planar-supported bilayers by epifluorescence micros...
Electric Field-Induced Reorganization of Two-Component Supported Bilayer Membranes
Electric Field-Induced Two-Component Bilayer Membranes
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2016/5/23
Application of electric fields tangent to the plane of a confined patch of fluid bilayer membrane can create lateral concentration gradients of the lipids. A thermodynamic model of this steady-state b...
Electric Field-Induced Concentration Gradients in Planar Supported Bilayers
Biophysical Phenomena Biophysics Diffusion Electricity Fluorescent Dyes Lipid Bilayers Microscopy,Fluorescence Models,Chemical
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2016/5/23
A simple method of generating electric field-induced concentration gradients in planar supported bilayers has been developed. Gradients of charged, fluorescently labeled probes were visualized by epif...
Effects of Applied Electric Fields on the Quantum Yields of the Initial Electron-Transfer Steps in Bacterial Photosynthesis.1.Quantum Yield Failure
Applied Electric Fields Quantum Yields Initial Electron-Transfer Steps Bacterial Photosynthesis.1.Quantum
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2016/5/23
The effect of an applied electric field has been measured for the quantum yield of formation of the P[sup +]H[sup [minus]], P[sup +]Q[sub A][sup [minus]], and [sup 3]P states of nonoriented Rb. sphaer...
Electric Field Effects on Kinetics of Electron Transfer Reactions:Connection Between Experiment and Theory
ADSORPTION KINETICS PROTEINS STRUCTURAL STABILITY
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2016/5/23
The dependence of the rate constant for electron transfer on energy can be systematically studied by measuring kinetics in an applied electric field. General relationships are developed between observ...
Electric Field Modulation of the Fluorescence Spectrum from Rhodobacter Sphaeroides Reaction Centers
fluorescence counterstain nuclear counterstain immunocytochemistry propidium iodide cell culture
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2016/5/20
The fluorescence intensity from randomly oriented Rhodobacter ( Rb.) sphaeroides photosynthetic reaction centers at 77 K increases in an applied electric field. This is ascribed to a net reduction in ...
The nuanced weapons of electric eels
nuanced weapons electric eels
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2015/11/12
Electric eels are formidable predators. Growing up to eight feet long and weighing as much as 44 pounds, they can generate 600 volts of electricity--five times the power of a home socket--to stun and ...
Electric eel:most remarkable predator in animal kingdom
Electric eel predator animal kingdom
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2015/11/12
The electric eel may be one of the most remarkable predators in the entire animal kingdom.That is the conclusion of Kenneth Catania, the Stevenson Professor of Biological Sciences at Vanderbilt Univer...
The “sixth sense:” How do we sense electric fields?
sixth sense sense electric fields
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2015/11/13
A variety of animals are able to sense and react to electric fields, and living human cells will move along an electric field, for example in wound healing. Now a team lead by Min Zhao at the UC Davis...
Understanding how cells follow electric fields
cells electric fields
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2015/6/18
Many living things can respond to electric fields, either moving or using them to detect prey or enemies. Weak electric fields may be important growth and development, and in wound healing: it’s known...
Imaging electric charge propagating along microbial nanowires（图）
microbial nanowires electric
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2014/12/1
AMHERST, Mass. -– The claim by microbiologist Derek Lovley and colleagues at the University of Massachusetts Amherst that the microbe Geobacter produces tiny electrical wires, called microbial nanowir...