منابع مشابه
Absorption Spectra Studies on Cholesterol and Ergosterol.*
In the previous paper it was shown that highly purified spinal cord cholesterol is still activatable to antirachitic activity when irradiated in the solid form by a Cooper Hewitt mercury vapor quartz lamp. Although the activatability is decreased by the purification methods employed, nevertheless these purified products can again be rendered at least 25 times more activatable if heated under th...
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The absorption of light in the photosynthetic process is generally believed to occur through the excitation of electrons in organic molecules to higher energy states thereby initiating a series of reactions. Recently an attempt has been made to fix the theoretical minimum quantum requirement at a number higher than that needed to obey the conservation of energy (2, 3). This argument rests on th...
متن کاملAbsorption Spectra of Phytochrome Intermediates
Native phytochrome (124kdalton) was isolated from etiolated seedlings o f Avena sativa L. cv. Pirol (Baywa, Munich). From low temperature spectra (0 °C to — 165°C ) o f phytochrom e samples irradiated either with red or far-red light, spectra o f intermediates were calculated. Both absorption bands o f the phytochrome chromophore were reported. On the pathway P r i V r , native phytochrome does...
متن کاملOptical Absorption Spectra of Bipolarons
The absorption of large bipolarons is investigated using the path-integral method. The response of a bipolaron to an external electromagnetic field is derived in the framework of the memory function approach. The bipolaron optical absorption spectrum consists of a series of relatively narrow peaks. The peculiarities of the bipolaron optical absorption as a function of the frequency of the elect...
متن کاملModeling of phytochrome absorption spectra
Phytochromes constitute one of the six well-characterized families of photosensory proteins in Nature. From the viewpoint of computational modeling, however, phytochromes have been the subject of much fewer studies than most other families of photosensory proteins, which is likely a consequence of relevant high-resolution structural data becoming available only in recent years. In this work, hy...
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ژورنال
عنوان ژورنال: Journal of the Royal Society of Medicine
سال: 1876
ISSN: 0959-5287,1758-1095
DOI: 10.1177/095952877605900108