نتایج جستجو برای: secondary mineral
تعداد نتایج: 366918 فیلتر نتایج به سال:
2. Secondary mineral deficiencies are by far the most common of the two. Secondary deficiencies are derived from the consumption of one or more mineral antagonists that interfere with the normal metabolism of another mineral. A simple mineral evaluation of a feedstuff may suggest that adequate trace mineral concentrations are present; however, the presence of a mineral antagonist will decrease ...
Olivine is one of the major crystals in ultrabasic rocks of Piranshahr Ophiolitic Complex. This mineral occurs as anhedral with cracks and fractures. Commonly, olivine is altered to serpentine along the fractures and rims. In some cases, serpentine crosscut the olivine. According to BSE images and mineral chemistry studies of olivine, the secondary iron- rich olivines occur at the rim of primar...
Specific elements (Cr, Al, Ca, and Si) and loss on ignition (LOI) were used for semi-quantitative determination of the normative mineralogical composition of naturally occurring chromium ores in ophiolite complexes. By far the occurring ore minerals are complex both from the mineralogical and chemical viewpoints. The secondary minerals serpentine and Cr-containing chlorite (kaemmererite) form n...
specific elements (cr, al, ca, and si) and loss on ignition (loi) were used for semi-quantitative determination of the normative mineralogical composition of naturally occurring chromium ores in ophiolite complexes. by far the occurring ore minerals are complex both from the mineralogical and chemical viewpoints. the secondary minerals serpentine and cr-containing chlorite (kaemmererite) form n...
Chah Sorb deposit is located about 66 Km north of Tabas and 16 Km north-west of Shirgesht village. The mineralogy is simple; galena is the main primary mineral and cerussite is the main secondary mineral. Sphalerite, pyrite, chalcopyrite, tetrahedrite are other main minerals. Secondary minerals are anglesite, malachite, flourite, wulfenite, minium, azurite and Fe-hydroxids. Some important alter...
Lava caves contain a wealth of yellow, white, pink, tan, and gold-colored microbial mats; but in addition to these clearly biological mats, there are many secondary mineral deposits that are nonbiological in appearance. Secondary mineral deposits examined include an amorphous copper-silicate deposit (Hawai'i) that is blue-green in color and contains reticulated and fuzzy filament morphologies. ...
Many animals in the tropics of Africa, Asia and South America regularly visit so-called salt or mineral licks to consume clay or drink clay-saturated water. Whether this behavior is used to supplement diets with locally limited nutrients or to buffer the effects of toxic secondary plant compounds remains unclear. In the Amazonian rainforest, pregnant and lactating bats are frequently observed a...
Secondary hyperparathyroidism contributes to post-transplant CKD mineral and bone disorder. Paricalcitol, a selective vitamin D receptor activator, decreased serum parathyroid hormone levels and proteinuria in patients with secondary hyperparathyroidism. This single-center, prospective, randomized, crossover, open-label study compared the effect of 6-month treatment with paricalcitol (1 μg/d fo...
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