Some new biosynthetic penicillins.

Biosynthesis of penicillins; new crystalline biosynthetic penicillins.

Paper III (1) in this series describes several tests which were found to be useful in determining whether a given compound is utilized by the mold in penicillin formation. To provide proof of the incorporation of various acyl groups into the penicillin molecule and to be able to determine the chemical characteristics and biological properties of the various penicillins, isolation and crystalliz...

Evolution of fungal β-lactam biosynthesis gene clusters

Filamentous fungi are microorganisms of great biotechnological interest due to their ability to synthesize a variety of bioactive secondary metabolites including β-lactam antibiotics, such as penicillins and cephalosporins. Hydrophobic (with aromatic side chains) penicillins are only produced by fungi, mainly Penicillium chrysogenum and Aspergillus (Emericella) nidulans, whereas hydrophilic cep...

The Effect of Beta-Cyclodextrin on the Iodometric Determination of Some Penicillins Reported in USP and BP

Comparison of acute toxicity (LC50) of chemical and biosynthetic by Sargasum angustifolium nanosilvers in Asian sea bass (Lates calcarifer)

This study was aimed to biosynthesis of silver nanoparticles using the seaweeds, Sargassum angustifolium and Comparison of acute toxicity (LC50) of commercial silver nanoparticles and biosynthetic nanoparticles performed by seaweed Sargasum angustifolium in Asian sea bass (Lates calcarifer) in 1397 in Ahvaz.After preparing extracts from Sargassum and biosynthesize the silver nanoparticles by ad...

New method of intermittent feeding in penicillin biosynthesis.

Under laboratory conditions, penicillin biosynthesis was improved by feeding sucrose and sodium phenylacetate to the fermentation flasks in the form of coated tablets.