نتایج جستجو برای: mineral transformation
تعداد نتایج: 286226 فیلتر نتایج به سال:
abstract the association between neotyphodium spp. endophytes and cool-season grasses, particularly tall fescue (festuca arundinacea, schreb), represents a widespread type of mutualism in nature. numerous researches were performed about positive effect of symbiosis on plant resistance to different stresses but the role of symbiosis on nutrients uptake particularly potassium uptake and k-bearing...
Pyromorphite (Pb5(PO4)3Cl), the most stable lead mineral under a wide range of geochemical conditions [1], can form in urban and industrially contaminated soils [2] [3] [4] [5]. It has been suggested that the low solubility of this mineral could reduce the bioavailability of lead, and several studies have advocated pyromorphite formation as a remediation technique for lead-contaminated land [3]...
Weathering of K-bearing minerals as the major source of potassium in soils is of special importance under K deficient conditions. Many studies have been carried out on the effect of plant types and microorganisms on the transformation of micaeous minerals and their potassium release. However, there is no information on the effect of organic matter on mineralogical changes in micaceous minerals....
Prediction of the transformation relations for minerals such as Iron and manganese bearing oxides are based on the percentage of other minerals were deposited in the iron bearing anomalies constitute one of the main aspects of geochemistry. In this article, the iron and manganese anomalies of Choghart and Narigan districts are considered. Transformation relations are obtained based on computati...
Injection of organic carbon into the subsurface as an electron donor for bioremediation of redox-sensitive contaminants like uranium often leads to mineral transformation and biomass accumulation, both of which can alter the flow field and potentially bioremediation efficacy. This work combines reactive transport modeling with a column experiment and field measurements to understand the biogeoc...
Biotite is a common rock-forming mineral and accepts a variety of elements in its structure. The valuable information of crystallization conditions of the biotite mineral obtain on natural biotite composition. The biotite mineral is one of the main mineral phases of pelitic rocks which are formed in a wide range of geological conditions. In this research, microscopic mineralogy, Raman spectrosc...
background: leukoplakia is a common, potentially premalignant lesion with malignant transformation rate from 1 to 17% with highest transformation rate for the lesions on the floor of the mouth, soft palate and tongue. one of the main etiological factors is consuming areca nut and its commercial preparations which generate high levels of reactive oxygen species during their metabolism. so the ai...
اثرات پستی و بلندی و آبیاری بر تکامل خاکها و تنوع کانیهای رسی در برخی از خاکهای گچی استان خوزستان
This study was done to evaluate the effect of topography, water table, and irrigation on gypsc soil development and clay mineral diversity in Ram-Hormuz Plain, Khuzestan Province. To localize, 10 profiles in this region that covered all purpose irrigation and topography situation were described. The results showed that the soils could be classified in Entisols, Inceptisols and Aridisols orders....
China is the biggest coal product and consumption country around the world. Lots of coal consumption resulted huge carbon dioxide (CO2) emission, especially for coal-fired power plant in China. Oxy-fuel combustion is currently considered to be one of the major technologies for CO2 capture in power plants. The ash formation mechanism and mineral transformation in high CO2 atmosphere is different...
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