Survival and Chemotactic Behavior of H pylori at Different Media pH

survival and chemotactic behavior of h pylori at different media ph

background: h pylori is a human gastric pathogen. chemotaxis is an essential factor in colonization of h pylori , but very little is known about its chemotactic responses at different ph conditions, especially in acidic environment of stomach as its natural habitant.   methods: we first determined survival of h pylori under various ph conditions in the presence and absence of urea.  chemotaxis ...

investigation of gassing behavior, electric and dielectric properties of different insulating fluids.

ترانسفورماتورهای قدرت از اجزای اصلی شبکه تامین انرژی الکتریکی می باشند که عملکرد قابل اطمینان ترانسفورماتورها یکی از فاکتورهای مهم و تعیین کننده در تامین انرژی الکتریکی محسوب می شود. در نتیجه بررسی و مانیتور عملکرد ترانسفورماتورها در شبکه و همچنین عیب یابی این ترانسفورماتورها غیرقابل اجتناب و ضروری می باشد. به طور کلی عایق های مایع در صنعت فشار قوی کاربردهای متفاوتی دارند که مهمترین وظیفه آنها...

Prolonged Survival and Cytoplasmic pH Homeostasis of Helicobacter pylori at pH

Prolonged survival and cytoplasmic pH homeostasis of Helicobacter pylori at pH 1.

In the presence of urea, Helicobacter pylori survived for at least 3 h at pH 1. Under these conditions, the cells maintained their cytoplasmic pH at 5.8. De novo protein synthesis during acid shock was not essential for survival of H. pylori at pH 1.

Spectrophotometric Determination of Protonation Constants of T ry p to ph an at Different Ionic Strengths and Various Ionic Media

The prtnonation constant values of tryptophan were studied at 25 C. different ionic strengths. 0.1-1.0 moldm", and various ionic media of NaCIO, and N4N01, using a combination of spectrophotometrie andpotentiometric techniques. The general vend for the two protonation con Slant Vai net of tryptophan is in theorder of NaC104 > NaNO3 in different ionic media. The dependence of protonation constan...

Predicting thermal inactivation in media of different pH of Salmonella grown at different temperatures.

The influence of the growth temperature and the pH of the heating medium on the heat resistance at different temperatures of Salmonella typhimurium ATCC 13311 was studied and described mathematically. The shift of the growth temperature from 10 to 37 degrees C increased heat resistance of S. typhimurium fourfold. The pH of the heating medium at which heat resistance was maximum was pH 6 for cel...