نتایج جستجو برای: ph tolerance
تعداد نتایج: 292509 فیلتر نتایج به سال:
BACKGROUND AND OBJECTIVE A new catheter-free outpatient oesophageal pH-meter system (Bravo) has recently been developed. The objective of this study is to test the tolerance, safety and efficacy of the system in the measurement of gastric-oesophageal reflux by comparing it with a conventional pH system. PATIENTS AND METHOD The study was performed on a control group consisting of 10 healthy vo...
BACKGROUND Non-mutans low pH oral streptococci are postulated to contribute to caries etiology. OBJECTIVE This study was undertaken to investigate whether the acidogenicity and acid tolerance of clinical strains of Streptococcus oralis and Streptococcus mitis correlate with health or early-stage enamel caries. DESIGN S. oralis and S. mitis were isolated from plaque samples taken from the oc...
Little is known about the capacity of early life stages to undergo hypercapnic and thermal acclimation under the future scenarios of ocean acidification and warming. Here, we investigated a comprehensive set of biological responses to these climate change-related variables (2°C above winter and summer average spawning temperatures and ΔpH=0.5 units) during the early ontogeny of the squid Loligo...
Sturgeons are among the most CO2 tolerant of fishes investigated to date. However, the basis of this exceptional CO2 tolerance is unknown. Here, white sturgeon, Acipenser transmontanus, were exposed to elevated CO2 to investigate the mechanisms associated with short-term hypercarbia tolerance. During exposure to 1.5 kPa Pco2, transient blood pH [extracellular pH (pHe)] depression was compensate...
using enrichment procedures, 45 organic solvent-tolerant lipase producer bacterial strains were screened from areas contaminated by oil and organic solvents. among the strains, 15 isolates exhibited extreme stability toward organic solvents and high lipolytic activity. the neb-1 isolate which was later identified as pseudomonas sp. strain neb-1 by biochemical tests and 16s rdna gene sequ...
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