The use of lactose as inducer for the expression of dextransucrase was investigated in high density of Escherichia coli. Different culture conditions including carbon source, nitrogen sources, inorganic salts, inoculum density (OD 600 ) and lactose concentrations were optimized, and high-level expression of dextransucrase in E. coli was achieved via an optimal culture conditions. The results in...

Proteolytic bacteria are most important for industries such as food and fermentation. Thus isolating and manipulating pure culture from various sources has importance for various biotechnology industries. In the present investigation a total of 26 bacteria were isolated from the dairy plant effluent. All isolates were screened for proteolytic activity using alkaline skim milk agar plate, among ...

This review describes the relationships and links between culture collections, which act as sources of genomes, transcriptomes, proteome, and metabolomes, and fields of research biochemistry that demand their support and help. In addition, the invaluable but not always rewarded efforts of these organizations as a source and conservator of organism diversity is discussed. Biological waste-water ...

Ethanol is an important industrial product. It can be degraded by microorganisms to use as sole source of carbon. Trichophyton mentagrophytes and Epidermophyton floccosum are most known species of dermatophytes. Their ability to degrade ethanol was detected. Low concentrations of ethanol enhanced two tested species of dermatophytes to grow on culture medium faster in absence of carbon source. A...

Sir, Urinary Tract Infections (UTIs) are a leading cause of bacterial infection in infants and the National Institute of Clinical Excellence recommends that UTIs are actively sought in paediatric patients. 1 Their incidence ranges from between 0.12.0% in full-term newborns, increasing to a reported 25% in preterm and very low birth weight (VLBW) infants. 2-4 The urinary tract is an extremely ra...

The fungi strains were tested in Bioscreen automated system to select the best nutritional source. Following, shaking submserse cultures were studied in media containing sole carbon or nitrogen source. The growth of these strains improved in media containing vegetable oil, with high concentration of lipids. The high concentration of γ-linolenic acid was obtained with M. circinelloides in cultur...

In this work, photostability, absorption and emission intensity of coated polycarbonate (PC) sheets with optical brightener (OB) as a wavelength converter material have been investigated. In addition, this coated sheet was used as a wall for microalgae culture flask, as a small scale photobioreactor, for studying the spectral conversion of UV-A radiation to blue light region and its effect ...

in this paper, a new circuit is proposed for step-up z-source inverter based on qzsi (quasi-z-source inverter). the proposed topology inherits all advantages of the conventional topology. the proposed topology in comparison with conventional topology reduces the st (shoot-through) duty cycle by over 25% at the same voltage boost factor. theoretical analysis of the proposed qzsi in the st and no...

Anaplasma marginale, a tick-borne rickettsial pathogen of cattle, infects bovine erythrocytes, resulting in mild to severe hemolytic disease that causes economic losses in domestic livestock worldwide. Recently, the Virginia isolate of A. marginale was propagated in a continuous tick cell line, IDE8, derived from embryonic Ixodes scapularis. Development of A. marginale in cell culture was morph...