ISOLATION AND CHARACTERIZATION OF NRCS-15, A NEW IRON-CONTAINING ANTIBIOTIC

synthesis and characterization of some new cyclometalated organoplatinum(ii) complexes containing phosphite ligand

در این تحقیق روشی جهت سنتز یک سری از کمپلکس های پلاتین (ii) حاوی لیگاند های دهنده ی فسفری شامل فسفیت و فسفین ارائه شده است. واکنش پیش ماده ی پلاتین (ii)،trans/cis- [ptcl2(sme2)2] ، با 2 اکی مولار از لیگاند p(oph)3در حلال بنزن کمپلکس1، cis-[ptcl2(p(oph)3)2] را تولید می نماید. جهت سنتز کمپلکس سایکلو متال فسفیتی، کمپلکس 1 با 1 اکی والان واکنشگر ptcl2 در حلال زایلن در شرایط رفلاکس زیر گاز آرگون م...

ASK-753, a new iron-containing antibiotic.

A new iron-containing peptide which inhibits the growth of Gram-positive and some Gram-negative bacteria was isolated from the broth of Streptomyces AS-K-753. The antibiotic was obtained as light buff plates. On acid hydrolysis eight amino acids, three organic acids and one keto acid could be detected. ASK-753 is similar in many properties to the sideromycin but differs from it in certain cruci...

Isolation and characterization of integron-containing bacteria without antibiotic selection.

The emergence of antibiotic resistance among pathogenic and commensal bacteria has become a serious problem worldwide. The use and overuse of antibiotics in a number of settings are contributing to the development of antibiotic-resistant microorganisms. The class 1 and 2 integrase genes (intI1 and intI2, respectively) were identified in mixed bacterial cultures enriched from bovine feces by gro...

Isolation and characterization of sarubicin A, a new antibiotic.

The new antibiotic sarubicin A [red crystals, mp. 194 approximately 195 degrees C, C18H14N2O6 (I)] was isolated from fermentations of a Streptomyces strain. The compound is moderately active in vitro against Micrococcus luteus.

Isolation, characterization, and structure of rabelomycin, a new antibiotic.