منابع مشابه
When it comes to antibiotics, bacteria show some NO-how.
Homologs to mammalian nitric oxide synthases are found in many mostly Gram-positive bacteria. In some genera such as bacilli, and staphylococci, these enzymes produce protects against oxidative damage, this effect has now been shown to provide an advantage against antibiotics that kill by increasing cellular levels of reactive oxygen species.
متن کاملScreening and some properties of new macromolecular peptide antibiotics.
In searching for macromolecular antitumor antibiotics of microbial origin, 2,875 kinds of Actinomycetes culture fluids were applied to a newly developed test system which consisted of antimicrobial assay using a macromolecule permeable mutant, DNA damage assay and mutagenicity test. As a result, 78 macromolecular antibiotics were found. Among them, 15 antibiotics precipitable with ammonium sulf...
متن کاملDissolution Study of Some Antibiotics
Dissolution behaviour of pure cefprozil monohydrate (CM) and cefuroxime axetile (CA) and their marketed tablets have been studied in aqueous as well as micellar media. Dissolution of cefprozil monohydrate is significantly assisted in presence of sodium dodecyl sulphate (SDS) and cetyltrimethylammonium bromide (CTAB). But, SDS and CTAB behave differently in accelerating the dissolution tendency ...
متن کاملSome Motor Cycles at the Stanley Show
more apparent to other users of the roads than to the rider, but on the other hand it is so speedy and economical a means of transit that its votaries are increasing in number every year. This year's show provides ample proof of steady progress in the evolution of a satisfactory machine, and the growing popularity of the light weight machine is perhaps the most striking tendency of the year. Am...
متن کاملAxenomycins, new cestocidal antibiotics.
Axenomycins are a new group of macrolide antibiotics isolated from the fermentation broth of Streptomyces lisandri n.sp. They exhibit anthelmintic activity against tapeworms (Cestoda). Three different fractions, A, B, and D, have been obtained, the most active fraction being axenomycin D. The activities of the axenomycin complex and axenomycin D against Hymenolepis nana in mice, Taenia pisiform...
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ژورنال
عنوان ژورنال: Nature Biotechnology
سال: 2000
ISSN: 1087-0156,1546-1696
DOI: 10.1038/75282