• Journal of Food Hygiene and Safety
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• v.35 no.2
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• pp.177-182
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• 2020

Copper possesses antimicrobial properties against certain bacteria and fungi. In this study, changes in microbial population, color and the antioxidant properties of dried red pepper powder (RPP) by contact with the surface of a copper plate were investigated. Lightness of RPP increased after treatment on the copper plate for 2 h at 55℃. The numbers of total aerobic mesophilic bacteria in RPP increased by 0.61 and 0.50 log on the surface of stainless steel and copper plates during 24 h at 37℃, respectively. The population of yeast and mold was reduced by 90% in the RPP treated on both copper and stainless steel plates under the same condition. Yeast and mold were significantly reduced on the copper plate during 2 h at 55℃. Scavenging activities of RPP treated on the copper plate for 24 h at 37℃ against DPPH radical were decreased; those for 2 h at 55℃ against ABTS radical were rather enhanced. The results suggest that copper might be applied in the processing and storage equipment in relation to RPP products for antimicrobial purposes.

• The Korean Journal of Nuclear Medicine
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• v.1 no.1
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• pp.21-35
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• 1967

Anemia is a usual finding in advanced malignant diseases. Various mechanisms were reported as to be involved in the development of anemia of this kind, and they may differ in individual cases. Tumor anemias may be due, for instance, to chronic blood loss, shortened life span of the red blood cells or a decreased hemopoiesis in the bone marrow. The serum iron and copper levels, total iron binding capacity, apparent half survival of $^{51}Cr$-labelled red blood cells were measured along with the ferrokinetic studies using $^{59}Fe$ in 64 patients with various malignant tumors. Following were the results: 1. The serum iron levels were decreased in all cases. There existed no correlation between the serum iron levels and the severity of the diseases. 2. The serum copper levels were increased, particularly in lung cancer, rectal cancer, hepatoma and various sarcomas. There was also no correlation between the serum copper levels and the severity of the diseases. 3. The serum iron levels appeared to be inversely proportional to the serum copper levels. 4. The total iron binding capacities were within normal limits in all cases. There were also no correlations between the total iron binding capacities, serum iron levels and the severity of the diseases. 5. The patients could be classified according to the ferrokinetic patterns, namely, that of iron deficiency anemia in 10 cases, that of refractory anemia in 6 cases, normal in 1 case and that of atypical abnormal in 9 cases. 6. Apparent half survival time of $^{51}Cr$-labelled red blood cells were definitely shortened in half of the cases.

• Economic and Environmental Geology
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• v.18 no.4
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• pp.301-308
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• 1985

I.P exploration is conducted mainly at the alluvium covered granodiorite stock of the Red Hill area at the Dongjeom coal mine, employing Canadian Mcphar equipments of variable frequencies-domain method along a total of 8.5 survey line. Mineralization zone is found by LP anomalies along the I.P the profile of frequency mode. Comparing with the past drilling data, the cause of each anomly is furthermore identified as copper bearing mineralized zones. As alteration and mineralization cover all over the Red-Hill altered grandiorite, copper bearing sulfide veinlets and strings filled out the fractured and altered zones.

• Korean Journal of Ichthyology
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• v.29 no.1
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• pp.41-51
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• 2017

To understand the application in farm for the fish aquaculture, we investigated biological and pathological traits on red sea bream Pagrus major which were reared in each copper-alloy net cage and the synthetic fiber net cage for 9 months. Two groups of cage were made and set in Yokji-eup, Tongyoung, Gyeongsangnam-do in size of 25 m in diameter and 10 m of depth. Survival rate of the red sea bream in the rearing copper-alloy net cage and synthetic fiber cage showed 99.75% and 99.70% respectively, there was no significant difference. Daily weight growth rate in each net was shown to 2.13 g/day and 1.65 g/day. Health analysis by blood composition analysis showed a favorable result in the copper-alloy net cage rather than in the synthetic fiber net. Bioaccumulation of heavy metal such as Cu and Zn especially in gonad was higher than other organ. Bioaccumulation of Cu and Zn in the muscle was lower compared to the permitted standard for food safety. Pathogenic infection test discovered Microcotyle tai for parasite, V. alginolyticus and other five species for bacteria. But there was a little bit difference of bacteria infection in copper-alloy net cage and copper-alloy net cage is expected to be has antibacterial effect. Thus, copper-alloy net cage can be applied to farm considering its system stability, recycling, antibiosis and food safety.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.27 no.5
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• pp.243-248
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• 2017

In this study copper glaze samples were prepared with varying amount of tin oxide, and the chromatic characteristics of glazes were explained on the results of spectrophotometric, crystalline phase, and microstructural analyses. The red color of copper glaze was dissipated with the addition of tin oxide and turned into achromatic color due to the decrease of CIEab values. Tin oxide homogeneously distributed in the glaze layer interfered with the red color generation coming from the growth of Cu nuclei, and formed an alloy with metal copper around bubbles. This resulted in the decrease of metal copper peak intensity with minor $Cu_2O$ peak. With the 3.79 % tin oxide addition the glaze was appeared as gray due to the black color CuO and Cassiterite $SnO_2$ phases.

• Journal of the Korean Ceramic Society
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• v.23 no.6
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• pp.15-24
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• 1986

• Bulletin of the Korean Chemical Society
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• v.24 no.12
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• pp.1767-1770
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• 2003

A simple, rapid and sensitive spectrophotometric method is herewith proposed for the determination of copper(II) by using diamine-dioxime ligand, meso-3,6,6,9-tetramethyl-4,8-diazaundecane-2,10-dione dioxime or meso-HexaMethyl Propylene Amine Oxime (meso-HMPAO). This method is based on the formation of a stable 1 : 1 red-pink complex between copper(II) and meso-HMPAO in aqueous solution. Absorption measurements were carried at 497 nm, with a molar absorptivity value of 338 L $mol^{-1}\;cm^{-1}$. Beer's law was obeyed over the concentration range of 0.5-370 ${\mu}$g $mL^{-1}$ with a Sandell's sensitivity value of 0.18 ${\mu}$g $cm^{-2}$. The proposed method has been successfully applied for determination of copper(II) in foodstuffs and pharmaceutical samples. The results obtained from this method are comparable with those obtained AAS.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.30 no.10
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• pp.651-655
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• 2017

This work reports the surface morphology and transmittance of copper oxide thin films for semitransparent solar cell applications. We prepared the oxide specimens by subjecting copper thin films to an oxidation reaction at annealing temperatures ranging between $100^{\circ}C$ and $300^{\circ}C$. The color of the as-deposited specimen was red, but changed to purple at the annealing temperature of $300^{\circ}C$. The surface morphology and transmittance of the specimens were significantly dependent on the annealing temperature and thickness of the copper films. Copper oxide nanoparticles prepared from a 20-nm-thick copper film at an annealing temperature of $300^{\circ}C$ provided a maximum transmittance of 93%. The obtained optical characteristics and surface morphology suggest that copper oxide thin films prepared by an oxidation reaction can be potentially employed as color- and transmittance-adjusting layer in semitransparent thin solar cells.

• Journal of Korean Society of Water and Wastewater
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• v.33 no.2
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• pp.131-140
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• 2019

This study used a packed column reactor and a horizontal flow mesh reactor to examine the removal of copper ions from aqueous solutions using pine bark, a natural adsorbent prepared from Korean red pine (Pinus densiflora). Both equilibrium and nonequilibrium adsorption experiments were conducted on copper ion concentrations of 10mg/L, and the removals of copper ions at equilibrium were close to 95%. Adsorption of copper ions could be well described by both the Langmuir and Freundlich adsorption isotherms. The bark was treated with nitric acid to enhance efficiency of copper removal, and sorption capacity was improved by about 48% at equilibrium; mechanisms such as ion exchange and chelation may have been involved in the sorption process. A pseudo second-order kinetic model described the kinetic behavior of the copper ion adsorption onto the bark. Regeneration with nitric acid resulted in extended use of spent bark in the packed column. The horizontal flow mesh reactor allowed approximately 80% removal efficiency, demonstrating its operational flexibility and the potential for its practical use as a bark filter reactor.

• Journal of The Korean Society of Clinical Toxicology
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• v.19 no.1
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• pp.59-63
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• 2021

Copper sulfate is widely used as a fungicide and pesticide. Acute copper sulfate poisoning is rare but potentially lethal in severe cases. Copper sulfate can lead to cellular damage of red blood cells, hepatocytes, and myocytes. Toxic effects include intravascular hemolysis, acute tubular necrosis and, rhabdomyolysis. A 76-year-old man presented with vomiting and epigastric pain. He had ingested a copper-containing fungicide (about 13.5 g of copper sulfate) while attempting suicide 2 hours prior to presentation. From day 3 at the hospital, laboratory findings suggesting intravascular hemolysis were noted with increased serum creatinine level. He was treated with a chelating agent, dimercaptosuccinic acid (succimer). His anemia and acute kidney injury gradually resolved with a 19-day regimen of succimer. Our case suggests that succimer can be used for copper sulfate poisoning when other chelating agents are not available.