• Journal of Plant Biology
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• v.35 no.4
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• pp.409-414
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• 1992

Effect of quercetin, a kind of natural plant flavonoids, on auxin-induced ethylene production in barley coleoptiles was studied. Auxin-induced ethylene production was apparently stimulated by quercetin. This stimulatory effect of quercetin appeared after 4 h of incubation period. Ethylene production was stimulated 200% over the control after 8 h of incubation by $3{\times}10^{-5}\;M$ quercetin. The quercetin effect was most prominent at $10^{-4}\;M$ of IAA. Ethylene production induced by the synthetic auxin, 2,4-D and NAA, was not significantly affected by quercetin. Also ACC-based ethylene production was unaffected by the flavonoid. In an effort to elucidate mechanisms of quercetin action on auxin-induced ethylene production, the effect of quercetin on 1M metabolism was studied. Data obtained from these experiments indicate that quercetin treatment resulted in about 90% inhibition of IAA oxidase activity. IAA ($3{\times}10^{-5}\;M$) conjugation was found to be not affected by quercetin. This results suggest that the stimulatory effect of quercetin on auxin-induced ethylene production may be due to the fact that quercetin inhibits 1M oxidase activity, thus increasing the free IAA level.

• Analytical Science and Technology
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• v.18 no.6
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• pp.559-567
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• 2005

For the analytical method of PCDD/Fs in blood, which have been issued recently, SRM 1589a of NIST(National Institute of Standards and Technology) was used and a practical analytical method of PCDD/Fs in blood was presented through comparison of methods of Canada and Japan. The proposed method used alkali-digestion extraction for removal of the lipid effectively using two capillary columns. The limit of quantification of TeCDD/DF and PeCDD/DF was 1 pg/g-lipid, HxCDD/DF and HpCDD/DF was 2 pg/g-lipid, OCDD/DF was 4 pg/g-lipid. With consideration the range of detected concentration, calibration standards were presented as $CS_L$(0.1~1), $CS_1/2$(0.25~2.5), $CS_1$(0.5~5.0), $CS_2$(2~20), $CS_3$(10~100).

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.229-230
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• 1999

생활폐기물 소각시설에서의 다이옥신이 사회적 관심사로 대두되면서 각 소각시설에서는 다이옥신 농도를 기준치이하로 저감시키려는 노력을 꾸준히 해왔다. 그 결과 '97년 이후 배출농도 수준이 점진적으로 개선되고 있다. 그 대책으로 여러 가지 방안이 시행되었으나 소각시설 운전의 최적화와 시설개선에 의한 효과가 가장 큰 것으로 판단된다. 이와 같은 개선노력의 일환으로 본 연구의 대상이 되는 생활폐기물 소각시설에서는 배출되는 다이옥신 농도를 저감시키기 위해서 시범 플랜트를 설치ㆍ운영하고 있고, 본시설 또한, 운전 최적화와 후처리시설의 대체를 도모하고 있다.(중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.11a
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• pp.330-331
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• 2000

환경오염 유기물질 중 다이옥신류는 높은 화학적 안정성과 생화학적 잔류성으로 인해 1970년대 이후 외국에서는 가장 중요한 환경물질의 하나로 취급되면서 다양한 연구가 이루어지고 있다. 이러한 다이옥신은 여러 가지 경로를 통해 생성되는데 이 중에서도 연소과정, 특히 폐기물 소각로에서 생성되는 것이 주 배출원으로 알려져 있다. 국내에서 1997년도 1차로 실시한 전국의 소각시설 다이옥신 배출 실태조사 이후 정부에서는 신설 도시쓰레기 소각장에 대해서는 0.1 ng-TEQ/Nm$^3$의 배출기준을 설정하고 정기적인 다이옥신 측정을 의무적으로 실시할 것을 법규화한 바 있다. (중략)

• Food Industry
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• s.150
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• pp.40-44
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• 1999

• KOREAN POULTRY JOURNAL
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• v.32 no.7 s.369
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• pp.128-129
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• 2000

• Analytical Science and Technology
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• v.13 no.5
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• pp.675-682
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• 2000

The concentration of dioxins from flue gases of municipal waste incineration facilities with capacities over 50 tons/day are regulated by the guideline: $0.1ng-TEQ/Nm^3$ for new facilities, and $0.5ng-TEQ/Nm^3$ for existing facilities and it will be strengthened to $0.1ng-TEQ/Nm^3$ until 2003 year. Dioxins from these incineration facilities have to be measured more than 2 times annually by the Official Test Facilities of Dioxins. Seven institutions have been certified so far as the Official Test Facilities of Dioxins. These facilities have to be evaluated by the quality control program provided by National Institute of Environmental Research every year. We reported the results of quality control test performed in 1999. Four institutions certified in 1998 sampled flue gases at stack of M incineration facilitiy and analyzed dioxins by Official Methods of Air Pollution. The isokinetic coefficients, the parameter for evaluation of sampling ability were excellent for all four institutions. They were 100.9%, 102.4%, 102.1% and 99.2%, respectively. The criteria required are as follows; resolution over 10,000, mass calibration within ${\pm}5ppm$, ion abundance ratio within 15%, and the recovery of 50-120%. As results, those institutions also met these parameters of Official Method of Air Pollution.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.8
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• pp.1169-1174
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• 2005

This study was carried out to investigate the biological effect of deer's antler velvet on the testicular toxicity of rats exposed to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD ). Thirty male rats were divided into three equal groups. The control group received vehicle (DMSO/acetone/soybean oil mixture) and saline; single dose of 50 $/mu$g/kg body weight TCDD was injected intraperitoneally into the single TCDD-treated and test group. Test group received ethanol extract of antler velvet (EAV) at daily dose of 20 mg/kg body weight for 5 weeks from one week before TCDD exposure. Decrease in body weight increment was less remarkable in test group compared with that of TCDD-treated group. TCDD-induced decrease in testicular weight, microtubular diameter and Johnson's score, and lesion were significantly alleviated by the treatment of EAV. This result led us to the conclusion that antler velvet can attenuate TCDD-induced testicular toxicity in rats.

• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2006.05a
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• pp.85-86
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• 2006

• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2001.05a
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• pp.93-106
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• 2001

폐기물처리에 있어 기존 스토카 방식으로는 다이옥신 문제에 대한 근본적 해결과 발생된 소각잔재물의 처리가 곤란하다. 아울러 비산재 적정처리에 따른 운영비 부담이 증가와 매립시 잔재물중에 함유된 다이옥신등 유해물질의 미처리에 따른 매립지의 2차 오염을 유발시키고 있다. 인터넷등의 보급 확대에 따른 선진국의 환경규제내용을 실시간으로 확인할 수 있고 생활수준의 향상에 따른 Clean 환경에 대한 욕구가 증대되고있으며 환경호르몬 등의 유해물질에 대한 주민 피해의식 및 환경에 대한 주민의 요구 수준이 증대되고 있는 실정이다. (중략)