نتایج جستجو برای: k uptake
تعداد نتایج: 501678 فیلتر نتایج به سال:
Soil salinity may cause nutrients imbalance in plants. Addition of some nutrients to saline soils may alleviate negative effects of salinity on plant growth and yield. In order to evaluate the effect of salinity and phosphorus on growth and chemical composition of two varieties of spinach (Khardar and Virofly Duch) a greenhouse experiment was carried out in a factorial arrangement 2×3×2 in a co...
اخیرا یک سری تحقیقات دامنه داری در زمینه ی تاثیرات پیچیدگی فعلیت محور(task complexity) بر روی تولید کلامی در قالب "صحت"ء "روانی" و "پیچیدگی" گفتار صورت گرفته است. هر چند تاثیرات "پیچیدگی فعلیت محور" برتعامل کلامی و "واکنش فراگیربه بازخورد تصحیح گر"(learner uptake) به ندرت مورد تحقیق قرار گرفته است. به منظور بررسی تاثیرات فعلیت محور بر روی واکنش فراگیر به بازخورد تصحیح گر 38زبان آموز مذکر در سطح...
The action of exogenous polyamines (putrescine, spermidine, and spermine) on ;washing' and fusicoccin-stimulated K(+) uptake and H(+) extrusion through the plasmamembrane in maize (Zea mays L., hybrid line Plenus S 516) root apical segments was studied. The results showed that polyamines inhibit the washing-stimulated K(+) influx and H(+) extrusion without interfering with K(+) uptake and H(+) ...
The uptake of glyphosate (N-[phosphonomethyl]glycine) by an Arthrobacter sp. which can utilize this herbicide as its sole source of phosphorus was investigated. Orthophosphate suppressed the expression of the uptake system for glyphosate and also competed with glyphosate for uptake. The K(m) for glyphosate uptake was 125 muM, and the K(i) for orthophosphate was 24 muM. Organophosphonates as wel...
background and objectives: the quefts model is using for optimizing fertilizer managements in crops, but it has not been used in iran yet. quefts accounts for interactions among npk affecting the ie of n, p and k and allows differentiation according to different yield levels targeted. it is necessary to determine crops parameters before application the model in the studying area. the first step...
The endothelin antagonist BQ-123, an anionic cyclopentapeptide, is taken up by rat hepatocytes through active transport systems. Here, we have examined the hepatocellular uptake mechanism for several BQ-123 derivatives with anionic charges using isolated rat hepatocytes. BQ-485, a linear peptide, BQ-518, a cyclic peptide, and compound A, a cyclic peptide with a cationic moiety, were taken up by...
We found that bacteria in a commercial soil conditioner sold in Ishinomaki, Miyagi, exhibited concentrative and saturable cesium ion (Cs(+)) uptake in the natural range of pH and temperature. The concentration of intracellular Cs(+) could be condensed at least a few times higher compared with the outside medium of the cells. This uptake appeared to be mediated by a K(+) transport system, since ...
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