Results 251 to 260 of about 205,721 (300)
Some of the next articles are maybe not open access.
Quenching of chlorophyll fluorescence by quinones
IUBMB Life, 1998AbstractQuinones caused quenching of Chl a fluorescence in native and model systems. Menadione quenched twofold the fluorescence of Chl a and BChl a in pea chloroplasts, chromatophores of purple bacteria, and liposomes at concentrations of 50‐80 μM. To obtain twofold quenching in Triton X‐100 micelles and in ethanol, the addition of 1.3 mM and 11 mM ...
V D, Samuilov +4 more
openaire +2 more sources
Fluorescence quenching immunoassay of serum cortisol
Steroids, 1980Fluorescence quenching immunoassay of serum cortisol was established. The minimal amount of cortisol detected was 3.1 ng/tube and serum concentration of 3.1 micrograms/dl to 100 micrograms/dl of cortisol could be measured. Intra- and inter-assay coefficient of variation were 7.7-10.5% and 10.7-13.3%, respectively.
Y, Kobayashi +3 more
openaire +2 more sources
Diffusional Fluorescence Quenching of Aromatic Hydrocarbons
Applied Spectroscopy, 2003The quenching of the fluorescence of five aromatic hydrocarbons by three halogenated organics and by molecular oxygen has been measured. Both fluorescence intensity and fluorescence lifetime measurements have been employed to validate results and interpretation; linear Stern–Volmer analyses are shown to apply throughout.
Clelia, Canuel +4 more
openaire +2 more sources
1983
Fluorescence quenching refers to any process which decreases the fluorescence intensity of a given substance. A variety of processes can result in quenching. These include excited state reactions, energy transfer, complex formation, and collisional quenching.
openaire +1 more source
Fluorescence quenching refers to any process which decreases the fluorescence intensity of a given substance. A variety of processes can result in quenching. These include excited state reactions, energy transfer, complex formation, and collisional quenching.
openaire +1 more source
Fluorescence quenching of tryptophan by trifluoroacetamide
Biochimica et Biophysica Acta (BBA) - General Subjects, 1984Trifluoroacetamide was found to be a good quencher of tryptophan fluorescence, and the quenching was shown to proceed via both a dynamic and a static process. The respective quenching constants were determined by the measurement of the decrease of the fluorescence lifetime in the presence of the quencher.
Midoux, Patrick +3 more
openaire +3 more sources
Fluorescence quenching of acridines by strandin
Archives of Biochemistry and Biophysics, 1961Abstract The interaction of four acridine compounds with strandin has been studied, with special attention being directed to acriflavine. In all cases fluorescence quenching by strandin occurs, the nature of the quenching curve depending on the dye involved.
A F, HARRIS, A, SAIFER, S K, WEINTRAUB
openaire +2 more sources
Fluorescence Quenching Reactions
1991The quenching of the fluorescence of biomacromolecules by solute quenchers has become a widely used and powerful technique (Lehrer, 1976; Lehrer and Leavis, 1989; Lakowicz, 1983; Eftink and Ghiron, 1981; Eftink, 1991). Such quenching reactions have been used primarily to obtain topographical information about proteins, nucleic acids, and membrane ...
openaire +1 more source
Concentration Quenching of Nd^3+ Fluorescence
Applied Optics, 1968Concentration quenching of the 1.06-micro Nd(3+) fluorescence in glass is investigated to help determine the nature of the Nd(3+)-Nd(3+) interaction that causes quenching. The relative fluorescent efficiency vs Nd(3+) concentration is measured for thin, polished plates of glass in an apparatus designed to minimize instrumental distortion of the ...
openaire +2 more sources
Quenched Fluorescent Substrate- Based Peptidase Assays
2005The use of specific quenched fluorescent substrates (QFS) provides a rapid and sensitive method to measure peptidase activity, and is readily adaptable to high-throughput screening of potential peptidase inhibitors. In this chapter, we discuss general considerations for the development of QFS assays, and describe in detail an assay protocol for the ...
Rebecca A, Lew +5 more
openaire +2 more sources
Apparent Concentration Quenching of Morphine Fluorescence
Science, 1963Fundamental fluorescence equations were examined. Deviations from the theoretical were observed by varying the light path length to determine effects on "apparent" fluorescence. It was found that the decrease in emission of morphine solutions with the increase in concentration was caused by absorption effects that prevented excitation of the whole ...
R, Brandt, M J, Olsen, N D, Cheronis
openaire +2 more sources