Physicochemical patterns of complex reduction multicomponent charge have been studied in the absence liquid phases order to obtain spongy ligatures. The contained both simple oxides and oxide compounds. was conducted being realized at expense carbon gases (CO H2) as well with participation carbide phase, which formed during process. dependence phase composition products on initial ratios O/(C+H...

The ores of chromite, nickel, copper, and zinc show a wide distribution over geologic time, but those of iron, titanium, lead, uranium, gold, silver, molybdenum, tungsten, and tin are more restricted. Many of the limitations to specific time intervals are probably imposed by the evolving tectonic history of Earth interacting with the effects of the biomass on the evolution of the earth's s surf...

Hexavalent chromium [Cr (VI)] is a constituent of chromite ore. Although it is known to have several industrial and technological applications, its release into the aquatic environment as a result of chemical spill or inadequate waste discharge may hamper the health of aquatic organisms. In this study, we have investigated the effects of Cr (VI) on multiple biomarkers responses in goldfish unde...

The process of assessing the public health risk of exposure to particular environmental contaminants is complicated and full of assumptions and uncertainties (1,2). However, the problems of assessing risks for chromium exposure are unusually complex (3,4). The problems posed by current investigations of chromiumcontaminated soil in northern New Jersey (5), in part, provided the impetus for a co...

background: dental waste can be hazardous to humans and the environment. objective: to determine the current status of dental waste management in private and public dental clinics and private dental offices in shiraz, southern iran. methods: this cross-sectional study was conducted at the shiraz university of medical sciences from february through june 2013. a stratified random sampling method ...

Cosmic-ray exposure ages of 480 million year old fossil meteorites found in Southern Sweden constrain delivery times of meteorites from a large collision in the asteroid belt. Chromite grains from seven meteorites from four stratigraphic layers define an exposure age gradient as expected if the meteorites originated from the well-known L-chondrite parent body break-up event. The very short deli...

Abstract The Gomati and Nea Roda ophiolites are located into the Serbo-Macedonian massif of Chalkidiki peninsula (Northern Greece). present work focuses on variability platinum-group elements (PGEs), geochemistry, spinel mineral chemistry, minerals (PGMs) — base metal (BMMs) assemblage in chromitites three localities (St. George, Tripes, Limonadika) Roda. studied show variable textures heavily ...

OBJECTIVES The aims of the study were to describe the noise levels at an open cast chromite mine in Odisha, India, and the hearing threshold of its workers and to associate their hearing loss with their age, work station and length of employment at the mine. METHODS We performed a cross-sectional study of the hearing threshold of chromite mine workers. Audiometric data from 500 subjects was c...