scholarly journals Anisotropy of thermo-optic properties of beryllium hexaaluminate crystal doped with chromium ions

2022 ◽  
Author(s):  
Konstantin Yumashev ◽  
V. GOMAN ◽  
L. Pavlovski ◽  
ELENA VILEJSHIKOVA ◽  
A. Yukhnouskaya ◽  
...  
Keyword(s):  
Chromium Ions

A preconcentration procedure for copper, nickel and chromium ions in some food and environmental samples on modified Diaion SP-850

2010 ◽  
Vol 48 (2) ◽  
pp. 482-489 ◽  
Author(s):  
A. Shokrolahi ◽  
M. Ghaedi ◽  
R. Shabani ◽  
M. Montazerozohori ◽  
F. Chehreh ◽  
...  
Keyword(s):  
Environmental Samples ◽  
Chromium Ions ◽  
Preconcentration Procedure ◽  
Copper Nickel

scholarly journals A theoretical and experimental study of the adsorptive removal of hexavalent chromium ions using graphene oxide as an adsorbent

2020 ◽  
Vol 18 (1) ◽  
pp. 936-942
Author(s):  
Ardhmeri Alija ◽  
Drinisa Gashi ◽  
Rilinda Plakaj ◽  
Admir Omaj ◽  
Veprim Thaçi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hexavalent Chromium ◽  
Adsorption Energy ◽  
Density Functional ◽  
Noncovalent Interactions ◽  
Theoretical Calculations ◽  
Chemical Oxidation ◽  
Chromium Ions ◽  
Adsorption Sites ◽  
Vis Spectroscopy

AbstractThis study is focused on the adsorption of hexavalent chromium ions Cr(vi) using graphene oxide (GO). The GO was prepared by chemical oxidation (Hummers method) of graphite particles. The synthesized GO adsorbent was characterized by Fourier transform infrared spectroscopy and UV-Vis spectroscopy. It was used for the adsorption of Cr(vi) ions. The theoretical calculations based on density functional theory and Monte Carlo calculations were used to explore the preferable adsorption site, interaction type, and adsorption energy of GO toward the Cr(vi) ions. Moreover, the most stable adsorption sites were used to calculate and plot noncovalent interactions. The obtained results are important as they give molecular insights regarding the nature of the interaction between GO surface and the adsorbent Cr(vi) ions. The found adsorption energy of −143.80 kcal/mol is indicative of the high adsorptive tendency of this material. The adsorption capacity value of GO toward these ions is q = 240.361 mg/g.

Effect of cobalt and chromium ions on MMP-1, TIMP-1, and TNF-α gene expression in human U937 macrophages: A role for tyrosine kinases

Biomaterials ◽  
2005 ◽  
Vol 26 (28) ◽  
pp. 5587-5593 ◽  
Author(s):  
Li Luo ◽  
Alain Petit ◽  
John Antoniou ◽  
David J. Zukor ◽  
Olga L. Huk ◽  
...  
Keyword(s):  
Gene Expression ◽  
Tyrosine Kinases ◽  
Chromium Ions ◽  
Tnf Α

scholarly journals Preparation of Silk Sericin/Lignin Blend Beads for the Removal of Hexavalent Chromium Ions

2016 ◽  
Vol 17 (9) ◽  
pp. 1466 ◽  
Author(s):  
Hyo Kwak ◽  
Munju Shin ◽  
Haesung Yun ◽  
Ki Lee
Keyword(s):  
Hexavalent Chromium ◽  
Silk Sericin ◽  
Chromium Ions

Mechanisms of chromium toxicity, carcinogenicity and allergenicity: Review of the literature from 1985 to 2000

2001 ◽  
Vol 20 (9) ◽  
pp. 439-451 ◽  
Author(s):  
A D Dayan ◽  
A J Paine
Keyword(s):  
Point Mutations ◽  
Chemical Species ◽  
Good Evidence ◽  
The Body ◽  
Relative Importance ◽  
Chromium Toxicity ◽  
Chromium Ions ◽  
Allergic Sensitisation ◽  
Chromium Compounds ◽  
Molecular Damage

Laboratory and clinical reports about the pathogenesis of the carcinogenicity and allergenicity of chromium compounds published between 1985 and 2000 have been reviewed as a basis for consideration of the pathogenetic mechanisms involved. There is good evidence from the clinic and the laboratory that Cr[VI] is the ion responsible for most of the toxic actions, although much of the under lying molecular damage may be due to its intracellular reduction to the even more highly reactive and short-lived chemical species Cr[III] and Cr[V]. Exposure to Cr[VI] can result in various point mutations in DNA and to chromosomal damage, as well as to oxidative changes in proteins and to adduct formation. The relative importance of these effects of chromium ions and of the free oxidising radicals they may generate in the body in causing tumours and allergic sensitisation remain to be demonstrated. Biochemical studies of the DNA-damaging effects and of the pathogenesis of the allergic reactions to chromium ions have not kept up with advances in understanding of the molecular basis of the effects of other carcinogens and allergens.

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