Bacterial Carotenoids 56. On the Spirilloxanthin Stereoisomeric Set.
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چکیده
منابع مشابه
Assembly of functional photosystem complexes in Rhodobacter sphaeroides incorporating carotenoids from the spirilloxanthin pathway
Carotenoids protect the photosynthetic apparatus against harmful radicals arising from the presence of both light and oxygen. They also act as accessory pigments for harvesting solar energy, and are required for stable assembly of many light-harvesting complexes. In the phototrophic bacterium Rhodobacter (Rba.) sphaeroides phytoene desaturase (CrtI) catalyses three sequential desaturations of t...
متن کاملStructural studies on bacterial carotenoids and their biosynthetic implications.
Detailed studies of the properties of carotenoids isolated from diphenylamine-inhibited cultures of Rhodospirillum rubrum have revealed a number of novel structures which indicate new features of carotenoid biosynthesis in the photosynthetic bacteria. The dehydrogenation of phytoene to coloured carotenoids occurs by a sequence which is different from that in higher plants in that 7,8,11,12-tetr...
متن کاملsurvey on the rule of the due & hindering relying on the sheikh ansaris ideas
قاعده مقتضی و مانع در متون فقهی کم و بیش مستند احکام قرار گرفته و مورد مناقشه فقهاء و اصولیین می باشد و مشهور معتقند مقتضی و مانع، قاعده نیست بلکه یکی از مسائل ذیل استصحاب است لذا نگارنده بر آن شد تا پیرامون این قاعده پژوهش جامعی انجام دهد. به عقیده ما مقتضی دارای حیثیت مستقلی است و هر گاه می گوییم مقتضی احراز شد یعنی با ماهیت مستقل خودش محرز گشته و قطعا اقتضاء خود را خواهد داشت مانند نکاح که ...
15 صفحه اولRelationship Between Red Light Mediated Glyceraldehyde-3-Phosphate Dehydrogenase Formation and Light Dependent Development of Photosynthesis.
4. BENEDICT, C. R. AND L. D. BECKMAN. 1964. Biosynthesis of the methoxylated carotenoids in Rhodospirillumn rubrum. Plant Physiol. 39: 726-30. 5. BRAITHWAITE, G. D. AND T. W. GOODWIN. 1958. Origin of the methoxyl groups in spirilloxanthin. Nature (London) 182: 1304-05. 6. COHEN-BAZIRE, G., XV. R. SISTROM, AND R. Y. STANIER. 1957. Studies on the pigment synthesis by nonsulfur purple bacteria. J....
متن کاملon the effects of pictorial clues on the efl learners listening comprehension development
the following null hypothesis was proposed: there is no significant difference between the efl students listening comprehension development receiving pictorial cues and those receiving no cuse. to test the null hypothesis, 52 male and femal freshmen students of medicine studing at iran university of medical scinces were randomly selected from a total population of 72 students. to ensure that th...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1997
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.51-1128