The effect of copper, zinc and iron sulphates on sphalerite flotation by sulphydryl collectors

2017 ◽  
pp. 7-12
Author(s):  
B. E. Goryachev ◽  
◽  
Kyaw Zay Ya ◽  
A. A. Nikolaev ◽  
◽  
...  
Keyword(s):  
Copper Zinc ◽  
Iron Sulphates ◽  
Effect Of Copper

Effect of Copper-Zinc Superoxide Dismutase on Endothelium-Dependent Vasodilation in Patients With Essential Hypertension

Hypertension ◽  
1995 ◽  
Vol 26 (6) ◽  
pp. 863-868 ◽  
Author(s):  
Carlos E. García ◽  
Crescence M. Kilcoyne ◽  
Carmine Cardillo ◽  
Richard O. Cannon ◽  
Arshed A. Quyyumi ◽  
...  
Keyword(s):  
Superoxide Dismutase ◽  
Essential Hypertension ◽  
Copper Zinc Superoxide Dismutase ◽  
Zinc Superoxide Dismutase ◽  
Copper Zinc ◽  
Effect Of Copper

scholarly journals Effect of Copper, Zinc and Boron on Green Leaf Retention and Grain Yield of Winter and Spring Cereals

2015 ◽  
Vol 5 (6) ◽  
Author(s):  
Syed Shah ◽  
Sarah Hookway ◽  
Andrew Richards ◽  
Carl Flint ◽  
Sarah Wilkinson ◽  
...  
Keyword(s):  
Grain Yield ◽  
Green Leaf ◽  
Spring Cereals ◽  
Copper Zinc ◽  
Leaf Retention ◽  
Effect Of Copper

Surface Hydrophobicity of an Acidophilic Heterotrophic Bacterium of Mine Origin under Metal Stress

2007 ◽  
Vol 20-21 ◽  
pp. 362-365
Author(s):  
K. Pakshirajan
Keyword(s):  
Heterotrophic Bacterium ◽  
Surface Hydrophobicity ◽  
Metal Resistance ◽  
Zinc Cadmium ◽  
Negative Effect ◽  
Copper Zinc ◽  
The Media ◽  
Culture Growth ◽  
Effect Of Copper ◽  
Special Relevance

Cell surface hydropobicity plays a significant role in microbe-mineral interactions with special relevance of bioleaching. The present investigation envisages a study on the hydrophobic character of Acidiphilium symbioticum KM2, an acidophilic strain of bioleaching environment, when grown in presence of heavy metals - copper, zinc, cadmium and nickel. The metals, at its sub inhibitory concentrations (MIC50), exhibited profound negative effect on the growth of the bacterium. Inhibition on the culture growth rate was highest due to cadmium followed by zinc, nickel and copper. However, upon successive adaptation in different concentrations of each metal in ascending order, the cells could grow rapidly in the presence of higher concentrations of the metals indicating good metal resistance by the bacterium. Compared to normally grown cells, A. symbioticum KM2, when grown in presence of the metals, became more hydrophobic, which was dependent on the metal and its concentration in the media. Among the four metals studied, the effect of copper was found to be the highest, where up to 74 % increase in the bacterial cell hydrophobicity was observed.

scholarly journals Effect of Copper Acyclovir Complexes on Herpes Simplex Virus Type 1 and Type 2 (HSV-1, HSV-2) Infection in Cultured Cells

1998 ◽  
Vol 5 (1) ◽  
pp. 19-23 ◽  
Author(s):  
M. Panteva ◽  
T. Varadinova ◽  
I. Turel
Keyword(s):  
Cultured Cells ◽  
Sensitive Strain ◽  
Published Data ◽  
Relative Level ◽  
Mdbk Cells ◽  
Copper Zinc ◽  
Effect Of Copper ◽  
Simplex Virus ◽  
Hsv 1

We have found that when copper, zinc or cobalt is bound to a suitable ligand, the appropriate complex exhibited a significant anti-HSV effect (Varadinova et al., 1993; 1996). Recently published data by Sagripanti et al. (1997) also show that the inhibition of HSV by copper was enhanced by reducing agents and that mechanism of the inactivation is similar as for copper-mediated DNA damage (Aruoma, et al. 1991; Dizdaroglu, et al., 1991; Toyokuni and Sagripanti, 1994). Therefore it was interesting to study the efect of Cu(ll) coordination compounds with acyclovir (ACV) on the replication of HSV in cultured cells. The experiments on cytotoxicity as well as on the activity of three different Cu-ACV complexes [Cu(ACV)2Cl2(H2O)2] = (A); [Cu(ACV)2(H2O)3](NO3)2.H2O = (B) and [Cu(ACV)2(H2O)2](NO3)2] = (C) towards virus replication, with special attention on the growth of ACV-resistant strain R-100 were performed on MDBK cells. ACV was used as a reference compound. The following results were obtained: 1) Increased cell’s viability in the presence of 20-40(g/ml ACV and decreased one in the presence of Cu-ACV complexes with relative level (A) >> (B) > (C); 2) Cu-ACV complexes are more cytotoxic than the ligand - ACV and the relative level is (C)>(B)>(A); 3) The anti-HSV effect of ACV can be modulated by copper at levels depending on the specificity of the particular virus strain: (i) for the ACV sensitive strain DA (HSV-1) - ACV ((A) > (C) > (B); (ii) for the ACV sensitive strain Bja (HSV-2) (A) > ACV > (C) > (B); (iii) for strain R-100 ( ACVR, TKa) - (A) > ACV > (C) > (B). This findings are consistent with previously published data and undoubtedly show that Cu-ACV complexes could be useful in the treatment of HSV infections, especially when the causative agent is a resistant to ACV mutant.

scholarly journals Effect of Copper, Zinc, Cadmium and Chromium in the Growth of Crambe

2014 ◽  
Vol 05 (11) ◽  
pp. 975-983
Author(s):  
Gilvanise Alves Tito ◽  
Lúcia Helena Garófalo Chaves ◽  
Josely Dantas Fernandes ◽  
Danilo Rodrigues Monteiro ◽  
Ana Carolina Feitosa de Vasconcelos
Keyword(s):  
Zinc Cadmium ◽  
Copper Zinc ◽  
Effect Of Copper

Studies on the nutrition of pasture plants in the south-west of Western Australia. I. The effect of copper, zinc and potassium on the growth of Dwalganup strain of Trifolium subterraneum L. on sandy soils

1951 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
RC Rossiter
Keyword(s):  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Field Trials ◽  
Interaction Effects ◽  
Economic Significance ◽  
Copper Zinc ◽  
Significant Yield ◽  
Effect Of Copper ◽  
Western Australian ◽  
Pasture Plants

The results of pot-culture experiments and field trials designed to examine the effects of copper, zinc, and potassium on the growth of Dwalganup subterranean clover on a number of Western Australian soils are presented and discussed. Highly significant yield increases from application of one or more nutrients were observed on all soils examined. The effects of applied copper were greater in the second year than in the seeding year under deficiency conditions in the field. Significant interaction effects were observed only with copper and potassium. Maximum yields in two of the field trials were low even with application of all three nutrients. Reasons for this are suggested. Data on leaf area changes indicated that, in contrast to the increasing severity of potassium deficiency with age of the plant, both copper and zinc deficiency tended to diminish after the commencement of the flowering stage. The importance of such time trends in the interpretation of interaction effects is emphasized. The economic significance of the potassium problem is stressed and a number of aspects requiring investigation are outlined.

Effect of copper, zinc and cadmium on the promoter of selenoprotein W in glial and myoblast cells

2002 ◽  
Vol 91 (2) ◽  
pp. 356-362 ◽  
Author(s):  
A. Amantana ◽  
W.R. Vorachek ◽  
J.A. Butler ◽  
N.D. Costa ◽  
P.D. Whanger
Keyword(s):  
Selenoprotein W ◽  
Copper Zinc ◽  
Effect Of Copper ◽  
Myoblast Cells

Histopathological Alternations of Blood Clam Tegillarca granosa in Acute Copper, Zinc, Lead and Cadmium Exposures

2012 ◽  
Vol 518-523 ◽  
pp. 422-425 ◽  
Author(s):  
Guang Xu Liu ◽  
Xue Liang Chai ◽  
Yan Qing Shao ◽  
Hong Xi Wu
Keyword(s):  
Heavy Metal Contamination ◽  
Female Gonad ◽  
Tegillarca Granosa ◽  
Toxicological Effect ◽  
Lead And Cadmium ◽  
Blood Clam ◽  
Copper Zinc ◽  
Toxic Mechanisms ◽  
Effect Of Copper ◽  
Cd Exposure

Blood clam, Tegillarca granosa, facing increasing danger of heavy metal contamination. In order to investigate the toxicological effect of copper (Cu), zinc (Zn), lead (Pb), and cadmium (Cd) on T. granosa, histopathological alternations were investigated in present study. Based on histopathological observation, Cu, Pb and Cd showed different degrees of damages to gills range from gill degeneration, gill fusion to interlamellar space and cilia reduction. In general, the more toxic the more severe damages to gills were observed. Massive oocytes degeneration in female gonad, muscle fiber degeneration and increased gap between muscle fibers in foot were found in Cd-exposure-treated T. granosa. Zn exposure induced an increase of epidermis wrinkles and a reduction of inner gaps. The results reveal different toxic mechanisms of tested heavy metals on T. granosa.

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