• Journal of Preventive Medicine and Public Health
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• 제17권1호
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• pp.245-250
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• 1984

Reciprocal exchanges of DNA in sister chromatids (SCEs) are induced by various carcinogens and mutagens, although the quantitative relationship between the number of mutations and SCEs induced varies among chemicals. Nevertheless, the analysis of SCEs production by various agents often proposed as a sensitive and quantitative assay for mutagenicity and cytotoxicity. Mercury, even if which has no evidences for mutagenicity and carcinogenicity, is reported to exert some cytotoxic effects, such as chromosomal aberrations or bad influences to ovulation and reproduction in experimental animals, etc.. In this study, tests for sister chromatid exchanges have been carried out on normal human lymphocytes in whole blood culture to add mercury chloride ($HgCl_2$) or methylmercury chloride ($CH_3\;HgCl$) for 72 hr. The results indicate the dose-dependent relationship between the frequencies of SCEs and the concentrations of $HgCl_2,\;CH_{3}HgCl$ and 5-bromo-2'-deoxyuridine (BrdU). Lymphocyte proliferation has depressed in the higher concentration of mercury.

• Fisheries and Aquatic Sciences
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• 제15권3호
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• pp.215-220
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• 2012

The effects of inorganic mercury on hematological parameters and hepatic oxidative stress enzyme activity were studied in olive flounder Paralichthys olivaceus. Fish were injected twice intraperitoneally with mercuric chloride (2, 4, or 8 mg Hg/kg BW). The major hematological findings were significant decreases in the red blood cell count, hematocrit value, and hemoglobin level in olive flounder exposed to 8 mg Hg/kg BW. Remarkably low levels of calcium and chloride, and reduced osmolality, were also observed at 8 mg Hg/kg BW. In hepatic tissue, significant increases in glutathione peroxidase and catalase activity were observed above 4 mg Hg/kg BW Inorganic mercury also increased glutathione S-transferase and glutathione reductase activity at 8 mg Hg/kg BW in hepatic tissue. The present findings suggest that exposure to a low concentration (${\geq}4$ mg Hg/kg BW) of inorganic mercury can cause significant changes in hematological and antioxidant parameters.

• 약학회지
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• 제29권4호
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• pp.223-226
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• 1985

0.1%-Merthiolate solutions were applied to rats with or without sodium selenite. Rat organs were excised under ether anesthesia. Mercury contents in rat tissues were determined by quartz tube combustion gold amalgamation method. Mercury contents were accumulated at about 3-fold in the brain, 143-fold in the kidney, 62-fold in the blood cell, 22-fold in the liver than those of untreated rats respectively, on the 1st day after application of mert iolate for 7 days. On the other hand, the addition of sodium selenite caused a shift in the tissue mercury distribution. Our study showed that simultaneous administration of sodium selenite increased the accumulation of mercury in the brain, but became to decrease it after 9 days, while decreased it in the kidney, but grew to increase it, respectively.

• 한국환경보건학회지
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• 제3권1호
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• pp.13-16
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• 1976

Authors investigated the analyse trace elements in vegetables and Ginseng which indicated as follows: 1. Garlic, ginger, and onion has considerably large amounts of magnesium, garlic has in proper sequence as copper, aluminum, magnesium, bromine and mercury. Ginseng has in proper sequence as aluminum, magnesium, copper, bromine and mercury, and onion has in proper sequence as copper, manganese, aluminum, bromine and mercury. 2. Carrot has considerably large amounts of magnesium and has in proper sequence as copper, magnesium, aluminum, bromine and mercury. 3. Ginseng also has large amounts of magnesium and has in proper sequence as magnesium, aluminum, copper, bromine, and mercury.

• Nuclear Engineering and Technology
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• 제8권1호
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• pp.41-47
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• 1976

Ge(Li) 검출기를 사용한 비파괴 방사화분석법을 이용하여 담수어중 수은 및 기타 미량원소들의 현재 함량 준위를 조사하다. 분석결과에 의하면 지역에 따라 수은의 함량이 크게 변하였으며 이 변화는 아마 지역적인 오염원에 의한 것으로 생각된다. 그리고 분석결과로 부터 미량원소들 중 어떤 원소들 사이에는 뚜렷한 상관관계가 있음을 알았다. 수은 오염의 중요한 원인으로 무연탄 연소가 고려될 수 있을 것으로 생각되어 수종의 무연탄을 분석하였다.

• 한국환경과학회지
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• 제15권2호
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• pp.157-162
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• 2006

This experiment was carried out to investigate the effects of mercury and arsenic on the growth of Arabidopsis thaliana when treated with three different concentrations. When treated with mercury, there was no noticeable difference in the growth of the plant between the group treated with $0.5\;{\mu}g/L$ (the effluent standard established by the Ministry of Environment) and the group treated with the concentration 100 times higher. They both showed almost the same level of growth as that of the normal plant. But the group of the concentration 10 times higher showed significantly $10\%$ more growth compared with the normal plant. When treated with arsenic, the three different groups all showed a little more growth compared with the normal plant. Interestingly, the group of the concentration 10 times higher than the official standard concentration of arsenic $(50\;{\mu}g/L)$ showed the highest level of growth, significantly $20\%$ more than the normal plant. These results show that some amount of mercury and arsenic in the soil do not have much effect on the growth of Arabidopsis thaliana, and that optimum concentrations of mercury and arsenic can even stimulate the growth of the plant.

• 한국식품영양과학회지
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• 제10권1호
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• pp.67-76
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• 1981

Paper Chromatography 법(法)으로 아미노산류(酸類)와 이노신산(酸) 및 수은중독(水銀中毒) 치료제(治療劑)인 BAL의 수은(水銀)에 대(對)한 친화력(親和力)의 크기를 비교(比較)하였다. 그 결과(結果) Cysteine Cystine 및 Methionine의 3종(種)의 합류황(合硫黃) 아미노산(酸)은 수은(水銀)과 쉽게 결합(結合)하였으나 다른 아미노산(酸)들과의 결합(結合)은 확인(確認)하지 못하였다. 수은(水銀)은 SH기(基)를 가지는 Sodium thiosulfate 및 BAL과는 쉽게 결합(結合)하였으며 이노신산(酸)과도 쉽게 결합(結合)하였다. 이들 함류황(含硫黃) 아미노산(酸) 류(類)보다 큰 것으로 판단(判斷)되었다.

• 한국입자에어로졸학회지
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• 제8권4호
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• pp.125-132
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• 2012

Mercury oxidation in an SCR(selective catalytic reduction) catalyst was tested in this study with the conditions simulating the SCR system in full-scale coal-fired flue gas. A commercially available SCR catalyst was located in a temperature-controlled reactor system, and simulated gas was injected into the reactor. Mercury oxidation efficiency was determined from the difference between inlet and outlet elemental mercury concentrations. A control experiment was carried out with the gas composition of 12% $CO_{2}$, 5% $H_{2}O$, 5% $O_{2}$, 500 ppm $SO_{2}$, 400 ppm NO, 400 ppm $NH_{3}$, 5 ppm HCl, and 20 ${\mu}g/m^{3}$ Hg. Additional tests were conducted with different gas composition from the control condition to investigate the effect of gas composition on mercury oxidation in the SCR catalyst.

• Bulletin of the Korean Chemical Society
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• 제32권4호
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• pp.1321-1326
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• 2011

In this work, the effects of different surface functional groups on the elemental mercury adsorption of porous carbons modified by chemical treatments were investigated. The surface properties of the treated carbons were observed by Boehm's titration and X-ray photoelectron spectroscopy (XPS). It was found that the textural properties, including specific surface area and pore structures, slightly decreased after the treatments, while the oxygen content of the ACs was predominantly enhanced. Elemental mercury adsorption behaviors of the acidtreated ACs were found to be four or three times better than those of non-treated ACs or base-treated ACs, respectively. This result indicates that the different compositions of surface functional groups can lead to the high elemental mercury adsorption capacity of the ACs. In case of the acid-treated ACs, the $R_{C=O}/R_{C-O}$ and $R_{COOH}/R_{C-O}$ showed higher values than those of other samples, indicating that there is a considerable relationship between mercury adsorption and surface functional groups on the ACs.

• 한국대기환경학회지
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• 제28권2호
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• pp.182-189
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• 2012

Co-combustion of sludge with coal is proposed as an alternative option for sludge disposal instead of ocean dumping. Because the combustion of sludge can cause emissions of various air pollutants, it is important to understand the characteristics of sludge combustion flue gases. Especially, very few studies are found to investigate mercury emissions from the co-combustion of sludge with coal. In this study, coal and sludge samples were prepared with different mixing ratios. These samples were combusted in a bench-scale combustor, and their flue gases were analyzed. Due to higher mercury content in the sludge sample, higher mercury emissions were found with an increase in a ratio of sludge to coal. Compared to the combustion flue gas of the coal sample, higher levels of mercury oxidation were found in the combustion flue gas of the samples including sludge.