نتایج جستجو برای: silicic acid
تعداد نتایج: 747990 فیلتر نتایج به سال:
We investigated a new procedure in which silicic acid column chromatography and fluorometry are used to assay plasma vitamin A. Using tntium-labeled vitamin A acetate and vitamin A alcohol as radioactive stan. dards, we identified two fluorescent components in plasma extracts chromatographed on silicic acid columns. One unidentified fluorescent component was eluted first with hexane or petroleu...
Samples of sea ice and snow cover on sea ice were collected with the icebreaker P/V Soya in early February 2007 in the southern Sea of Okhotsk in order to evaluate the amount of nutrients in the sea ice and snow. The concentration of nitrate + nitrite, phosphate and silicic acid in the samples was measured in conjunction with such physical parameters as temperature, salinity, oxygen isotopic ra...
چکیده ندارد.
The effects of silicic acid on the growth of Thermus thermophilus TMY, an extreme thermophile isolated from a siliceous deposit formed from geothermal water at a geothermal power plant in Japan, were examined at 75 degrees C. At concentrations higher than the solubility of amorphous silica (400 to 700 ppm SiO(2)), a silica-induced protein (Sip) was isolated from the cell envelope fraction of lo...
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