Reduction of Acid Tolerance by Tetracycline in Escherichia coli Expressing tetA (C) Is Reversed by Cations

Photocatalytic Removal of Escherichia Coli by ZnO Activated by Ultraviolet-C Light from Aqueous Solution

Abstract: Background and objectives: There is a great interest in photocatalytic oxidation of contaminants, using ZnO, in recent years. The main objective of this research was to study photocatalytic disinfection of E. coli bacteria as water microbial pollution index, using nano particles of ZnO and a UV lamp in a batch reactor. Material and Methods: In this study, the contaminated water sample...

Inhibition of proline synthesis by tetracycline in Escherichia coli.

Proline is synthesized from glutamic acid by way of the intermediate glutamic -y-semialdehyde, as in the following equation: glutamic acid + glutamic 'y-semialdehyde -* proline. In Escherichia coli W, the first reaction is subject to endproduct inhibition by proline (A. Baich and D. J. Pierson, Biochim. Biophys. Acta 104:397, 1965). This reaction is also inhibited by low, although higher than b...

‏‎suppression of coke formation in thermal cracking by coke inhibitors‎‏

‏‎the main purpose of this research was to:1.develop a coking model for thermal cracking of naphtha.2.study coke inhibition methods using different coke inhibitors.developing a coking model in naphtha cracking reactors requires a suitable model of the thermal cracking reactor based on a reliable kinetic model.to obtain reliable results all these models shall be solved simultaneously.for this pu...

Case Report of Meningoencephalitis in Calves Caused by Escherichia coli

Active efflux of tetracycline encoded by four genetically different tetracycline resistance determinants in Escherichia coli.

Tetracycline resistance encoded by four genetically different determinants residing on plasmids in Escherichia coli was shown to be associated in each case with an energy-dependent decrease in accumulation of the antibiotic in whole cells in which resistance had been induced. The different class determinants examined were those on plasmids RP1 (class A), R222 (class B), R144 (class C), and RA1 ...