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2012
Nickel (Ni) and chromium (Cr) are elements naturally present in all rock types and present in the pedosphere in a range from trace amounts to relatively high concentrations, as compared to other trace elements. Particularly high Ni and Cr concentrations are found in serpentine rocks and soils, originating from this rock type and colonized by a ...
GONNELLI, CRISTINA, RENELLA, GIANCARLO
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Nickel (Ni) and chromium (Cr) are elements naturally present in all rock types and present in the pedosphere in a range from trace amounts to relatively high concentrations, as compared to other trace elements. Particularly high Ni and Cr concentrations are found in serpentine rocks and soils, originating from this rock type and colonized by a ...
GONNELLI, CRISTINA, RENELLA, GIANCARLO
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Chromium–Chromium Bonding in Binuclear Azulene Chromium Carbonyl Complexes
European Journal of Inorganic Chemistry, 2010AbstractThe experimentally known cis‐[(η5,η5‐C10H8)Cr2(CO)6] structure with a rather long formal Cr–Cr single bond of about 3.3 Å is predicted by density functional theory to be the lowest energy C10H8Cr2(CO)6 structure. However, a trans‐[(η7,η5‐C10H8)Cr2(CO)6] structure lies in energy within ca. 4 kcal/mol of this global minimum.
Hongyan Wang +4 more
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The exchange of chromium between chromium (II) and chromium (III) ions
Recueil des Travaux Chimiques des Pays-Bas, 1954AbstractA rapid exchange of radioactive chromium has been observed between Cr+++ and Cr++ ions.
H. van der Straaten, A. H. W. Aten
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Relative chromium response as an indicator of chromium status
The American Journal of Clinical Nutrition, 1978Twenty-seven women ages 40 to 75 were divided into normal (n = 15) and hyperglycemic (n = 12) groups on the basis of 3-hr glucose tolerance tests. Each subject received 5 g of brewer's yeast extract containing 4 microgram of chromium daily for 3 months.
V J, Liu, J S, Morris
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Dislocation structure in chromium, chromium-rhenium, and chromium-iron alloys
Journal of the Less Common Metals, 1966Abstract Electron-transmission microscopy experiments were performed on chromium, chromium-rhenium, and chromium-iron alloys to investigate the effect of alloying on dislocation multiplication and configuration. It was found that the increase of dislocation density with strain was largely independent of composition, but that large alloying additions ...
C.N. Reid, A. Gilbert
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Removal and recovery of chromium and chromium speciation with MINTEQA2
Talanta, 2002Chromium(III) is commonly found in large quantities in tannery wastewaters. For this reason, the recovery of the chromium content of these wastewaters is necessary for environmental protection and economic reasons. Removal and recovery of chromium were carried out by using ion exchange resins.
Kocaoba, Sevgi, Akçin, Göksel
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Triamidoamine Complexes of Chromium(III) and Chromium(IV)
Inorganic Chemistry, 2001Treatment of [CrCl3(THF)3] with slightly more than 1 equiv of Li3(N3N) [(N3N)(3-) = ((Me3SiNCH2CH2)3N)(3-)] affords the triamidoamine complex [Cr(N3N)] (1) in 75% yield. 1 is oxidized by PhICl2, CuCl2, or AgCl to give the chromium(IV) complex [Cr(N3N)Cl] (2) in moderate yields.
S, Schneider, A C, Filippou
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Chromium Isotopes and the Fate of Hexavalent Chromium in the Environment
Science, 2002Measurements of chromium (Cr) stable-isotope fractionation in laboratory experiments and natural waters show that lighter isotopes reacted preferentially during Cr(VI) reduction by magnetite and sediments. The 53 Cr/ 52 Cr ratio of the product was 3.4 ± 0.1 per mil less than that of the ...
Andre S, Ellis +2 more
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Bioremediation of chromium solutions and chromium containing wastewaters
Critical Reviews in Microbiology, 2014Cr(VI) represents a serious threat to human health, living resources and ecological system as it is persistent, carcinogenic and toxic, whereas, Cr(III), another stable oxidation state of Cr, is less toxic and can be readily precipitated out of solution. The conventional methods of Cr(VI) removal from wastewaters comprise of chemical reduction followed
Piyush, Malaviya, Asha, Singh
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Biological Trace Element Research, 1992
Several studies indicate that glucose tolerance improves and lipid levels decline in the elderly after supplementation with Cr-rich brewer's yeast or inorganic Cr. Other studies report equivocal results or no changes. Interpretation of these investigations is hampered by 1. Lack of a marker to identify Cr-deficient people 2.
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Several studies indicate that glucose tolerance improves and lipid levels decline in the elderly after supplementation with Cr-rich brewer's yeast or inorganic Cr. Other studies report equivocal results or no changes. Interpretation of these investigations is hampered by 1. Lack of a marker to identify Cr-deficient people 2.
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