• Title, Summary, Keyword: Copper Sulfate

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Studies on the Dyeing of Hanji by Natural Dye-stuffs(IV) - With a focus on the clove tree - (천연염료를 이용한 한지염색에 관한 연구(IV) - 정향나무를 중심으로 -)

  • Jeon, Cheol;Ahn, Young-Hwan;Jeon, Hyung-Ja
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.38 no.3
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    • pp.66-71
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    • 2006
  • The objective of this study was to find in what color Hanji(Korean hand-made paper) is dyed when it is dyed with a pigment extracted from clove tree using different kinds of mordant, and how the paper is discolored and variety of strength under the condition of accelerated aging test. The results of this experiment are as follows. The Hanji dyed with aluminum acetate mordant was colored yellowish brown at pH 4.82, discoloration after aging was as much as a slight difference of color was recognized, and the decrease of strength after aging test was small. Thus, the method using aluminum acetate mordant was usable in coloring Hanji. The second most useful Hanji dyeing moth of was using distilled water and ferrous sulfate mordant, which dyed Hanji light brown at pH 6.03. However, when pigment was extracted using distilled water and copper sulfate mordant was used, discoloration was satisfactory but strength decreased too much and pale brown was obtained. Thus, this method was not usable.

Studies on the Natural Dyes(11) -Dyeing Properties of Cochineal Colors for Wool Fibers- (천연염료에 관한 연구(11) -코치닐 색소의 양모섬유 염색성-)

  • 조경래
    • Textile Coloration and Finishing
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    • v.11 no.4
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    • pp.39-49
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    • 1999
  • In order to study the properties of cochineal colors, uv-visible spectra of cochineal colors solution, dyeing properties on the wool in several dyeing conditions and thermodynamic parameters were investigated. UV-visible spectra of cochineal colors solution showed hypochromic effect with the lapse of irradiation time but bathochromic shift with decreasing acidity of solution and addition of metallic ions. The concentration of cochineal colors in wool fiber increased with the increase of dyeing temperature, time, and acidity of initial dyebath. The value of apparent diffusion coefficients and standard affinities of dyeing decreased with the increase of dyeing temperature. The standard heats of dyeing$(\Delta{H}^\circ)$ and variation of entropy$(\Delta{S}^\circ)$ increased with the increase of concentration of initial dyebath. The activation energy$(E_a)$ were calculated to be 1.399~2.595kcal/mol in condition of 6~1%(o.w.f) dyebath. Wool fabrics were dyed reddish blue by iron sulfate, copper sulfate, aluminum acetate and tannic acid, and red by tin chloride, respectively. Lightfastness of wool fabrics dyed by cochineal colors were increased by mordant treatment, especially copper sulfate and iron sulfate treatment.

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Effects of Copper and Selenium Supplementation on Performance and Lipid Metabolism in Confined Brangus Bulls

  • Netto, Arlindo Saran;Zanetti, Marcus Antonio;Claro, Gustavo Ribeiro Del;de Melo, Mariza Pires;Vilela, Flavio Garcia;Correa, Lisia Bertonha
    • Asian-Australasian Journal of Animal Sciences
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    • v.27 no.4
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    • pp.488-494
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    • 2014
  • Twenty-eight Brangus cattle were used to determine the effect of copper and selenium supplementation on performance, feed efficiency, composition of fatty acids in Longissimus dorsi (LD) muscle, and cholesterol concentration in serum and in LD muscle and enzymes activities, reduced glutathione (GSH) and oxidized glutathione (GSSG). The treatments were: i) Control, without copper (Cu) and selenium (Se) supplementation; ii) Se, 2 mg Se/kg of dry matter such as sodium selenite; iii) Cu, 40 mg Cu/kg of dry matter such as copper sulfate; iv) Se/Cu, 2 mg Se/kg of dry matter such as sodium selenite and 40 mg Cu/kg of dry matter such as copper sulfate. LD muscle fatty acid composition was not influenced by the treatments (p>0.05). The serum concentration of cholesterol was not influenced by the treatments (p>0.05), however, the concentration of cholesterol in LD was lower in cattle supplemented with copper and selenium (p<0.05). Oxidized glutathione and reduced glutathione increased (p<0.05) with Cu, Se and Se/Cu supplementation. The supplementation of copper (40 mg/kg DM) and selenium (2 mg/kg DM) altered the metabolism of lipids in confined Brangus cattle, through a decrease in cholesterol deposition in the LD, possibly by changing the ratio between reduced glutathione/oxidized glutathione. Copper and selenium supplementation improved animal performance and feed efficiency (p<0.05) when compared to the control group, providing advantages in the production system, while also benefiting consumers by reducing cholesterol concentration in the meat.

A Study on Bacterial Leaching of Low-Grade Copper Mineral(IV) (저품위 동광석의 세균침출에 관한 연구 4)

  • 박원구;이강순
    • Korean Journal of Microbiology
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    • v.11 no.4
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    • pp.189-195
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    • 1973
  • With the gradual expansion of copper demands, the utilization of enormous tonnages of waste copper mineral containig up to 0.5% copper becomes available. In order to investigate the possibilities on the application of bacterial leaching method to waste dumps or abandoned mines, the authors had carried out microbial leaching of copper minerals by F.ferrooxidans isolated from the Dalsung copper mine water. The results obtained were as follows : 1. The copper extraction rate from the Dalsung chalcopyrite has been a little accerelated by using flasks in place of percolators. 2. The percentage of copper extracted from the Dalsung chalcopyrite sample was 100% in 30 days in the presence of iron-oxidizing bacteria F.ferrooxidans while 9.27% in the absence of bacteria. 3. F.ferroxidans was capable of producing sufficient quantities of ferric sulfate and sulfuric acid from ferrous iron to bring about the dissolution of 100% of copper from the Dalsung chalcopyrite.

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Studies on the Spectrophotometric Determination of Gentamicin Sulfate and its Preparations (분광광도법에 의한 제제중 Gentamicin Sulfate의 정량에 관한 연구)

  • 이진호;양호석;이윤중
    • YAKHAK HOEJI
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    • v.27 no.1
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    • pp.45-52
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    • 1983
  • The ability of gentamicin to form a stable coloured complex with copper (II) in a sodium carbonate buffer solution, which had a maximum absorption at 694nm, was used for the spectrophotometric quantitative determination of gentamicin sulfate. The calibration curve obtained was linear over the range of 200~2,000mcg per ml of the sample and the analysis was very well agreed with the microbiological method.

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Histopathological Changes on the Striated Muscle of Rabbits Fed Zinc, Copper and Linoleic Acid (Zn, Cu 및 Linoleic Acid의 급여(給與)에 의한 가토(家兎) 횡문근(橫紋筋)의 병리조직학적(病理組織學的) 변화(變化))

  • Hu, Min-Do;Lee, Cha-Soo
    • Korean Journal of Veterinary Research
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    • v.23 no.1
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    • pp.69-79
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    • 1983
  • The present studs was undertaken to observe the histopathological changes on the cardiac and skeletal muscles, and liver of rabbits fed a commercial ration, either alone or with supplements of Zinc (3,000mg/kg. of diet, as sulfate), Copper (1,500mg/kg. of diet, as sulfate), Linoleic acid (3% of diet), Zinc with Linoleic acid and Copper with Linoleic acid. In the skeletal muscle, light microscopic changes observed were cloudy swelling, hyaline degeneration, atrophy, fragmentation and coagulative necrosis of muscle fibers, and proliferation of fibroblasts and infiltration of mononuclear cells. Especially, in rabbits fed with supplements of Zinc with Linoleic acid and Copper with Linoleic acid, calcification with muscle fibers progressing to necrosis were often observed. In the myocardium, loss of muscle fibers with necrosis and vacuolization, hyaline degeneration, hemorrhage and congestion were observed. In the liver, congestion and necrosis of hepatocytes, and centrilobular necrosis were observed. Differences of histological changes among the experimental groups was not marked.

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Characteristics of Copper Plating Solutions for Electroforming of Microcircuit (미세 배선 성형을 위한 전주용 동도금액의 특성)

  • Park, Hae-Deok;Jang, Do-Yeon;Gang, Seong-Gun
    • Korean Journal of Materials Research
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    • v.11 no.10
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    • pp.820-832
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    • 2001
  • In order to obtain the basic data on the optimum conditions of electroforming process for fabricating the micro wiring pattern for plate type micro- motor core, characteristics of plating bath and properties of deposits were studied with various copper plating baths which contain sulfate, fluoborate, pyrophosphate and cyanide salt, respectively. Cathodic polarization, throwing power, internal stress, texture and surface morphology of deposits were observed. Throwing power of plating solution is deeply related to the polarization curves and the values are in the range of +20∼20%. The order of values ate as follows- pyrophosphate, cyanide, sulfate and fluoborate bath. Internal stresses of deposits are tensile in all of the copper plating bath. Thickness of the deposits plated at the center of holes has the highest value in the pyrophosphate bath and K factor, ratio of height and width of deposit, is 1.44. It was confirmed that the pyrophosphate bath was the best one for the electroforming of wire pattern.

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Interaction between Selenium and Bacterium and Mineralogical Characteristics of Biotreated Selenium (셀레늄-미생물간의 반응 및 셀레늄 광물화 특성)

  • Lee, Seung-Yeop;Oh, Jong-Min;Baik, Min-Hoon
    • Journal of the Mineralogical Society of Korea
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    • v.24 no.3
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    • pp.217-224
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    • 2011
  • Removal of dissolved selenium by D. michiganensis, a iron-reducing bacterium, and effects of dissolved metal elements such as iron, sulfate, and copper were investigated. Selenide that was reduced from selenite (2 mM) by D. michiganensis was gradually removed from the aqueous medium. As the reduced selenide was combined with aqueous iron, it was precipitated as a nanoparticulate iron-selenide. Sulfate and copper negatively affected the microbial selenite reduction, and the copper was especially toxic to the bacterium, inhibiting a microbial removal of dissolved selenite. These results show that it should be carefully biotreated for a selenium-contaminated site considering in situ sulfate or copper distribution and concentration. Consequently, the formation of iron-selenide by bacteria will be an important measure for preventing a long-distance migration of selenium in the subsurface environments.

Removal of Copper and Zinc Ions by Neutralization from the Spent Sulfate Solutions of Brass Bulb Base (황동(黃銅) 전구(電球) Base 제조과정(製造過程)에서 발생(發生)한 구리와 아연 함유(含有) 황산폐수(黃酸廢水)의 중화법(中和法)에 의한 제거(除去))

  • Lee, Man-Seung;Ahn, Jae-Woo;Lee, Chang-Hae
    • Journal of the Korean Institute of Resources Recycling
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    • v.16 no.6
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    • pp.39-45
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    • 2007
  • Optimum condition for neutralization has been studied to remove the copper and zinc ions from spent sulfate solutions which resulted from the acid washing of the base of brass bulb. Chemical distribution of copper and zinc species and the variation of solubility of the two ions with solution pH were obtained by considering the complex formation reaction and mass balance. Removal percentage of zinc was more sensitive to solution pH than that of copper. This results from the fact that the solubility of zinc is higher than that of copper. The form of coagulant affected little the removal percentage of zinc, while addition of coagulant as the phase of solution resulted in higher removal percentage of copper than as the phase of solid.

Convergent Study of Texture on the Mechanical Properties of Electrodeposits (구리 도금층의 기계적 성질에 미치는 집합조직의 융합연구)

  • Kang, Soo Young
    • Journal of the Korea Convergence Society
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    • v.7 no.6
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    • pp.193-198
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    • 2016
  • The texture of electrodeposits varies with deposition conditions. Texture of electrodeposits is also related to microstructure, surface morphology and mechanical properties. When the electrodeposits annealed, the recrystallization texture may be different from the original deposition texture. The surface morphology, the microstructure and the initial and recrystallization textures of copper electrodeposits vary with deposition conditions. The texture, microstructure, surface morphology and mechanical properties of electrodeposits are known to vary with electrolysis conditions, such as bath composition, over potential, pH, current density, bath temperature, etc. The (111) and (110) textures of copper electrodeposits can be obtained from copper sulfate bath. In this study, copper electrodeposits with (111) and (110) textures are obtained from a copper sulfate bath, and the change from (111) to (110) textures of copper electrodeposits can be explained.