منابع مشابه
Microbial origin of desert varnish.
Scanning electron microscopy and energy dispersive x-ray analyses of desert varnish reveal that microorganisms concentrate ambient manganese that becomes greatly enhanced in brown to black varnish. Specific characteristics of desert varnish and of varnish bacteria support a microbial origin for manganese-rich films. Varnish microbes can be cultured and produce laboratory manganese films. Accord...
متن کاملThe Drugs of Microbial Origin
Tremendous progress has been made in the past decade in the development of new disease-preventing agents. Foremost among such agents arc penicillin and strc^ptomycin, both of microbial origin. Other antibiotic substances of siinilar origin, such as chloromycetin^ aurcomycin, and terramycin^ are becoming especially valuable. Still others, including bacitracin, subtilin, ]:>olymyxin, and circulin...
متن کاملInterferon Production by Nonviral Stimuli of Microbial Origin
An increasing number of nonviral materials of microbial origin has been reported to stimulate the production of interferon in cell cultures and (or) in animals. These materials include (a) gram-negative bacteria or the endotoxins prepared from their cell walls, (b) other microorganisms such as Rickettsiae, Bedsoniae, Protozoa, and (c) fungal products such as a mannan from Candida and various an...
متن کاملExperiences in the search for anti-inflammatory agents of microbial origin.
Whole shaken cultures of 20 random, unidentified actinomycetes were extracted with n-butanol at pH 4.5, 7.0 and 8.5, respectively. Residues of butanol-extractable materials (BXM) were reconstituted (100X) in buffers and freeze-dried. BXM were surprisingly well tolerated in animals and were screened against influenza A viral pneumonia in mice. One culture yielded BXM-80 which suppressed both che...
متن کاملAntimitotic agents of natural origin.
Antimitotic agents have been the most successful pharmacological agents for the treatment of cancer. The term "antimitotic agent" has traditionally been synonymous with tubulin-targeting compounds, but as a consequence of the large number of new compounds and mechanisms that have been identified recently, a much broader definition is currently needed. This review attempts to provide a broad ove...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1958
ISSN: 0022-1287
DOI: 10.1099/00221287-18-2-491