نتایج جستجو برای: heavy mineral
تعداد نتایج: 190219 فیلتر نتایج به سال:
As part of a broader investigation into recent environmental change on Svalbard, the inorganic geochemical record of six lake-sediment cores was analysed. The major temporal trends in sediment elemental composition are driven by variations in two contrasting sediment components, both derived from catchment soils: (1) mineral matter, and (2) soil organic matter (SOM), enriched in Fe and Mn oxide...
An actinobacterial strain, designated SO9-6, was isolated from a copper iron sulfide mineral. The organism is Gram-positive, facultatively anaerobic, and coccoid. Chemotaxonomic and phylogenetic properties were consistent with its classification in the genus Kocuria. Here, we report the first draft genome sequence of Kocuria marina SO9-6 under accession JROM00000000 (http://www.ncbi.nlm.nih.gov...
Ethylene is a gaseous plant hormone involved in many aspects of plant life, including seed germination, flower senescence, abscission, and fruit ripening (Abeles et al., 1992). It also plays a very important role in the responses of plants to both biotic and abiotic stresses (Abeles et al. The production of ethylene is tightly regulated by internal signals, and usually increases in response to ...
The chemistry textbooks tell us that uranium was discovered by the German chemist, Martin Heinrich Klaproth, in 1789, which is perhaps a simplification of the truth. The element was named after the planet Uranus and what Klaproth reported to the Royal Prussian Academy of Science in that year was uranium oxide, which he had separated from the heavy, black mineral known as pitchblende. The elemen...
Bone development is usually seen as a process of bone mineral accretion or increase in bone mass, and treatment of bone disorders usually consists of attempts to maximise bone mass accumulation by nutritional means only. However, from a functional perspective, bones should not be as heavy as possible, but rather as stable as necessary. It is therefore important to create conditions that stimula...
Shelgerd area is located south of Mashhad, N.E of Iran, within Binalud Structural Zone. This region is affected by regional metamorphism, slate and phylite are the main metamorphic rocks of the area. Teriassic slate, phyllite, sandstone and Jurassic conglomerates crop out parallel to Sang bast- Shandize fault. Mineralization occurred as vein type, with trend of N65E to N50W with 75 degrees to t...
Heavy metal toxicity is a major public health concern. Exposure to such metals as cadmium, arsenic, lead etc. in human body causes deleterious effect. World Health Organization informed that the emission rate of cadmium is maximum in developing countries than in the developed part. Cadmium poisoning is reflected in the form of renal dysfunction, poor bone mineral density. It’s occurrence in nat...
BACKGROUND Exposure to heavy metals from environmental and industrial sources remains a concern of serious public health risk. This study was conducted to analysis the relationship between heavy metal concentrations and bone density. METHODS This study used data from a nation-based sample of Koreans (n=2,429) from 2008 to 2011 Korea National Health and Nutrition Examination Survey. We were ob...
Environmental pollution may be caused due to mines and mineral deposits. The accumulation of the associated heavy metals in soil and especially at the root zone of plants would result in plant contamination. This paper aims to detect the dominant heavy metals in Eucalyptus leaves using both biochemical and hyperspectral techniques for northern part of Bam in Iran. In this regards, using biochem...
Heavy metals are of wide concern due to their high toxicity, bioaccumulation and non-degradability. In this study, eight heavy (Cr, Mn, Ni, Cu, Zn, As, Cd, Pb) in the surface sediments Ningyuan River were studied investigate distribution pattern, pollution status potential sources, it was concluded that concentration is highly consistent with population pattern space there a certain degree risk...
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