نتایج جستجو برای: ph tolerance

تعداد نتایج: 292509  

Journal: :Journal of health sciences and medicine 2021

Aim: Urine Ph (U-pH) is a clinical indicator of acid excretion in the urine and load diet. The association between low U-pH net secretion with obesity, metabolic syndrome, diabetes, chronic kidney disease, uric nephrolithiasis were showed. aim this study to evaluate patients different glucose tolerance status.
 Materials methods: This was designed as single-center, retrospective, cross-sec...

2014
Shawna A Foo Symon A Dworjanyn Mehar S Khatkar Alistair G B Poore Maria Byrne

To predict the effects of global change on marine populations, it is important to measure the effects of climate stressors on performance and potential for adaptation. Adaptation depends on heritable genetic variance for stress tolerance being present in populations. We determined the effects of near-future ocean conditions on fertilization success of the sea urchin Pseudoboletia indiana. In 16...

2011

Aluminium toxicity is a major crop production constraint, particularly in acid tropical soils. The toxicity is aggravated when pH falls below 5.5 since toxic monomeric Al species get solubilized. The screening of Al tolerance intrinsically depends on culture medium, with a nutrient solution having pH of 4.5 being recommended. Hydroponic experiment was carried out at Jomo Kenyatta University of ...

Journal: :Journal of Experimental Botany 2009
Konstantin Yu Kulichikhin Hank Greenway Lindsay Byrne Timothy D. Colmer

Rice coleoptiles, renowned for anoxia tolerance, were hypoxically pretreated, excised, 'healed', and then exposed to a combination of anoxia and pH 3.5. The putative acid load was confirmed by net effluxes of K(+) to the medium, with concurrent net decreases of H(+) in the medium, presumably mainly due to H(+) influx. Yet the coleoptiles survived the combination of anoxia and pH 3.5 for at leas...

Journal: :Bioresource technology 2011
Jian Lu Tianhu Chen Jun Wu P Chris Wilson Xiangyang Hao Jiazhong Qian

The acid tolerance response of an AMD bioremediation system based on sulfate reduction was investigated. Efficient sulfate reduction was observed with a maximum sulfate reduction rate of 12.3±0.8 mg L(-1) d(-1) and easily available organic carbon was released during high acid treatment with an initial pH of 2.0. The rapid increase in sulfate reduction was observed when the extreme acid treatmen...

Journal: :The Journal of experimental biology 2014
Adam W Paganini Nathan A Miller Jonathon H Stillman

We show here that increased variability of temperature and pH synergistically negatively affects the energetics of intertidal zone crabs. Under future climate scenarios, coastal ecosystems are projected to have increased extremes of low tide-associated thermal stress and ocean acidification-associated low pH, the individual or interactive effects of which have yet to be determined. To character...

2015
Hongwei Zhang Ruineng Xu Chuanxiao Xie Changling Huang Hong Liao Yunbi Xu Jinxiang Wang Wen-Xue Li

Low-phosphorus (LP) stress is a global problem for maize production and has been exacerbated by breeding activities that have reduced the genetic diversity of maize. Although LP tolerance in maize has been previously evaluated, the evaluations were generally performed with only a small number of accessions or with samples collected from a limited area. In this research, 826 maize accessions (in...

2011
Masako Nakamura Shun Ohki Atsushi Suzuki Kazuhiko Sakai

Ocean acidification may negatively impact the early life stages of some marine invertebrates including corals. Although reduced growth of juvenile corals in acidified seawater has been reported, coral larvae have been reported to demonstrate some level of tolerance to reduced pH. We hypothesize that the observed tolerance of coral larvae to low pH may be partly explained by reduced metabolic ra...

Journal: :Applied and environmental microbiology 1987
R E Marquis G R Bender D R Murray A Wong

The arginine deiminase system in a variety of streptococci and in Pseudomonas aeruginosa was found to be unusually acid tolerant in that arginolysis occurred at pH values well below the minima for growth and glycolysis. The acid tolerance of the system allowed bacteria to survive potentially lethal acidification through production of ammonia to raise the environmental pH value.

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