منابع مشابه
Biochemistry of Actinomycins.
The toxicity and biological activity of actinomycins at all levels of biological organi zation investigated to date are based on their ability to form tight, reversible complexes with DNA. The presence of guanine in a DNA preparation, preferably in the helical configuration, is necessary and sufficient for the formation of the characteristic complexes. Bound actinomycin produces alterations in ...
متن کاملChemistry of the Actinomycins
The actinomycins are yellow-red crystalline antibiotics that are produced by various species of Streptomyces. Streptomyces is a genus ofsoil microbes that, on the basis of its morphology, has a position between the fungi and the bacteria. The actinomycins are highly toxic and cannot, therefore, be used in the treatment of infectious diseases. They are, however, of interest because in small, non...
متن کاملOrigin of the sarcosine molecules of actinomycins.
1. Streptomyces V-187 produces on minimal medium a mixture composed mainly of actinomycin C(1) (actinomycin D) and actinomycin A(1) (actinomycin I). If sarcosine is added to the medium, the micro-organism produces, in addition to actinomycins C(1) and A(1), actinomycin F(8) (actinomycin II) and actinomycin F(9) (actinomycin (III), characterized by the substitution by sarcosine of one or both th...
متن کاملcomparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.
heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...
15 صفحه اولantioxidant and antimicrobial activity of allium jesdianum extract
چکیده بررسی فعالیت ضد اکسیدانی و ضدمیکروبی عصاره گیاه بن سرخ (allium jesdianum) به کوشش: زهرا مقیمی هدف از این تحقیق بررسی میزان ترکیبات فنولی کل، ترکیبات فلاوونوئیدی کل، فعالیت ضداکسیدانی و ضدمیکروبی عصاره ی گیاه تازه و خشک بن سرخ بود. استخراج عصاره به روش های غوطه وری، استفاده از همزن مغناطیسی، دستگاه مایکروویو، امواج فراصوت و گرمادهی مقاومتی و با استفاده از متانول، اتانول و آب به عنوا...
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ژورنال
عنوان ژورنال: Biomeditsinskaya Khimiya
سال: 2013
ISSN: 2310-6905,2310-6972
DOI: 10.18097/pbmc20135903349