نتایج جستجو برای: k na
تعداد نتایج: 617134 فیلتر نتایج به سال:
PURPOSE It has been established that Na,K-ATPase activity is higher in lens epithelium than fibers. However, others have suggested the Na,K-ATPase enzyme may be inactive or absent in the central 10% of the epithelium. Studies were conducted to measure and compare Na,K-ATPase specific activity and to examine Na,K-ATPase protein expression in the anterior and equatorial regions of porcine lens ep...
Thirty Angus steers averaging 357 kg were used to: 1) determine the effect of feeding lasalocid (33 mg/kg diet) on mineral metabolism and 2) determine the effects of varying dietary sodium (Na) and potassium (K) on finishing steers fed lasalocid. Treatments consisted of: 1) control (.25% Na, .5% K); 2) lasalocid (.05% Na, .5% K); 3) lasalocid (.25% Na, .5% K); 4) lasalocid (.05% Na, 1.4% K) and...
Messenger RNA levels of phospholemman (PLM), a member of the FXYD family of small single-span membrane proteins with putative ion-transport regulatory properties, were increased in postmyocardial infarction (MI) rat myocytes. We tested the hypothesis that the previously observed reduction in Na+-K+-ATPase activity in MI rat myocytes was due to PLM overexpression. In rat hearts harvested 3 and 7...
In order to study the effect of salinity on dry mass production of linseed at vegetative phase and the effects of water deficit on some agronomics, grain yield, seed oil and protein content of six linseed genotypes two experiments were carried out in 2012. In pot experiment, four levels of NaCl salt including 0 (control), 35 (moderate salinity), 70 (high salinity) and 105 mM (severe salinity) w...
The influxes of Na(+) and K(+) into the human red cell appear to be interrelated. This relationship was investigated under conditions in which either Na(+) or K(+) concentration outside the cell was varied or one cation was replaced by Mg(2+), choline(+), or Li(+). The effects of furosemide on Na(+) and K(+) movements were studied in the presence of ouabain. When ouabain was present, Na(+) infl...
GerN, a Bacillus cereus spore germination protein, exhibits homology to a widely distributed group of putative cation transporters or channel proteins. GerN complemented the Na(+)-sensitive phenotype of an Escherichia coli mutant that is deficient in Na(+)/H(+) antiport activity (strain KNabc). GerN also reduced the concentration of K(+) required to support growth of an E. coli mutant deficient...
جاسمونات‌ها ترکیب‌های مهم علامت‌دهنده در پاسخ‌های گیاهان به تنش‌های زیستی و غیرزیستی ازجمله نمو هستند. از طریق ارزیابی رشد، محتوای یونی و فنلی، کمّیت و کیفیت اسانس، نقش متیل‌جاسمونات (MeJA) در مقابله با تنش شوری القاء شده با NaCl در گیاه Mentha piperita L. بررسی گردید. برای این منظور، گیاهان 24 ساعت بعد از کاربرد برگی صفر، 60 و 120 میکرومولار MeJA، تحت غلظت‌های شوری 1.86 (شاهد)، 5، 7.5 و 10 دسی...
Abiotic stresses such as salinity, are factors that severely affects agricultural production. To evaluate the effects of salinity on some morphological and physiological traits related to salt tolerance of 22 genotypes of spring rapeseed cultivars in the vegetative growth stage, an experiment was conducted as a split plot form based on Randomized Complete Blocks Design using levels of salinity:...
(Na+/K+)ATPase liposomes of various degrees of reconst i tu t ion are formed by varying the amount of phosphatidylcholine added to the soluble (Na+/K+) ATPase before vesicles are formed by cholate removal. In the presence of ATP) the reconstituted sodium pump effectuates (Na+/K +) antiport. In the absence of ATP, the reconstituted sodium pump forms a (Na+/K +) channel. The stable plateaus forme...
Drought stress is one of the most important environmental stresses in reduce of growth and plants production. Determination of resistance mechanisms to environmental stress in plant improvement is very important. In order to , experiment with osmotic potentials of PEG (zero (control), -4, -8 & -12 bar) and alfalfa genotypes was done. The selected alfalfa genotypes namely, Yazdi(tolerant), Niksh...
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