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- 저자 : 이재구(Jae Koo Lee) (검색결과 176 건)
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이재구,김기철,Lee, Jae-Koo,Kim, Ki-Cheol 한국응용생명화학회 1978 Applied Biological Chemistry (Appl Biol Chem) Vol.21 No.3
3,4-DCA의 미생물(徵生物)에 의(依)한 분해기구(分解機構)를 구명(究明)하기 위하여 토양사상균(土壤絲狀菌) C. globasum과 배양(培養)하여 다음의 結果를 얻었다. 1. 3,4-Dichloroacetanilide가 주(主)된 대사산물(代謝産物)로 밝혀졌으며 이는 Acetylation이 주된 대사경로(代謝經路)임을 시사(示唆)해 준다. 2. 소량(少量) 생성(生成)된 3,4-dichloronitrobenzene, TCAB, 3,4-dichlorophenylhydroxylamine, 그리고 3.4-DCA의 존재(存在)는 부차적(副次的)인 경로(經路)로 방향족(芳香族) A-mine의 산화(酸化)를 암시(暗示)해 준다. 3. m/e 112, 114 및 279인 대사산물(代謝産物)이 분리(分離)되었으나 이들의 구조(構造)는 계속 연구중(究硏中)이다. 4. 배양중(培養中) 발생(發生)하는 탈염소(脫鹽素) 반응(反應)은 수산화(水酸化) 및 기타(其他) 대사산물(代謝産物)의 형성(形成) 가능성(可能性)을 시사(示唆)해 준다. In order to investigate mechanisms related to the microbial degradation of 3,4-dichloroaniline, it was incubated with a soil fungus, Chaetomium globosum and the following results were obtained. (1) 3,4-Dichloroacetanilide turned out to be the major metabolite, indicating that acetylation is the major scheme. (2) The presence of trace amounts of 3,4-dichloronitrobenzene, 3,3', 4,4'-tetrachloroazo-benzene, 3,4-dichloroaniline is suggestive of the aromatic amine oxidation as the minor pathway. (3) Other metabolites with m/e 112, 114, and 279 were also isolated, but their identities are under investigation. (4) Dechlorination occurring during incubation indicates the possibility of forming hydroxylated and other metabolites.
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이재구,후르니에,Lee, Jae-Koo,Fournier, J.C. 한국응용생명화학회 1978 Applied Biological Chemistry (Appl Biol Chem) Vol.21 No.2
불란서(佛蘭西)의 수종(數種) 토양중(土壤中)에서 3,4-DCA 및 TCAB의 변화과정을 구명하기 위하여 환표식(環標識)된 $^{14}C-3,4-DCA$ 및 $^{14}C-TCAB$를 사용하여 실험을 행(行)한 바 다음의 결과(結果)를 얻었다. (1) $^{14}C-3,4-DCA$가 $^{14}CO_2$로 분해(分解)되는 속도(速度)는 배양초기(培養初期)에는 비교적(比較的) 빠르고 후기(後期)에는 완만하다. 배양 6개월 후(後)에 alkaline soil(pH=7.9)에서 dose 1(1.5 ppm)에서 최고(最高) 6.5%, dose 2(94 ppm)에서 최하(最下) 1.92%의 분해율(分解率)을 보였다. organic acid soil(pH=5.5)의 경우 dose 1에서 4.91%, dose 2에서 4.24%가 분해(分解)되었으며 양자간(兩者間)에는 대차(大差)가 없었다. (2) Dose 1로 3,4-DCA를 6개월동안 배양할 때 organic acid soil에서는 47.70%, Alkaline soil에서는 29.49%가 토양에 결합되었다. 한편 dose 2의 경우 organic acid soil에서는 38.40%, alkaline soil에서는 20.30%가 결합(結合)되었다. (3) 토양중(土壤中)에서 3,4-DCA로부터 생성(生成)되는 TC-AB의 양(量)은 토양(土壤)의 종류(種類)보다는 3,4-DCA의 사용농도(使用濃度)에 의존(依存)하는것 같다. dose 2에서 생성(生成)된 TCAB의 양(量)은 organic acid soil에서는 추출액(抽出液)의 총방사능(總放射能)의 50%, alkaline soil에서는 30%에 해당하며 이것은 토양시료(土壤試料)에 첨가한 최초(最初)의 방사능(放射能)의 1.8%와 1.4%에 각각(各各) 해당된다. 반면 dose 1에서는 추출액(抽出液)의 총방사능(總放射能)에 비(比)하여 두 토양(土壤) 공(共)히 $2{\sim}3%$를 넘지 못하며 최초(最初)의 총방사능(總放射能)의 $0.05{\sim}0.1%$를 초과(超過)하지 못한다. (4) $^{14}C-TCAB$가 $^{14}CO_2$로 분해(分解)되는 속도(速度)는 매우 느리며 배양 6개월후에 4종(四種)의 토양(土壤)에서 모두 $0.05%{\sim}0.20%$의 분해율(分解率)을 보였고 배양 3개월후에 뚜렷한 분해산물(分解産物)을 검출(檢出)할 수 없었으며 대부분(大部分) 미분해(未分解)된 상태로 존재(存在)하였다. (5) Alkaline soil에서 다른 토양에서 보다 훨씬 많은 양(量)의 $^{14}C-TCAB$가 토양중(土壤中)에 흡착(吸着)된 것으로 보아 Alkali토양 조건하에서 $trans-TCAB{\rightarrow}cis-TCAB$의 전환(轉換)이 일어나 이 흡착성이 더 강한 cis 이성체(異性體)가 토양중(土壤中)에 많이 흡착(吸着)된 것으로 생각(生覺)된다. In an attempt to elucidate the fate of 3,4-DCA and TCAB in various French soils, uniformly $^{14}C-ring-labeled$ 3,4-DCA and TCAB mere utilized and the following results obtained. 1) The rate of breakdown of $^{14}C-3,4-DCA$ into $^{14}CO_2$ was relatively higher in the early stage than that in the later stage. In 6 months of incubation in alkaline soil (pH 7.9), the rate was as high as 6.5% at dose 1 (1.5 ppm) and as low as 1.92% at dose 2(94 ppm), whereas in organic acid soil (pH 5.5) the rate was 4.91% at dose 1 and 4.24% at dose 2, respectively, without making any great difference between the two levels. 2) At dose 1, 47.70% of the initial radioactivity of $^{14}C-3,4-DCA$ was bound to soil in organic acid soil and 29.49% bound in alkaline soil, whereas at dose 2, 38.40% in organic acid soil and 20.30% in alkaline soil, respectively. 3) The amount of formation of $^{14}C-TCAB$ from $^{14}C-3,4-DCA$ seems to depend largely on the concentration of 3,4-DCA applied rather than on soil types. At dose 2, the amount was 50% of the total radioactivity extracted in organic acid soil and 30% in alkaline soil, corresponding to 1.8% and 1.4% of the initial radioactivity applied to soil, respectively. Cis-TCAB also seemed to be formed at dose 2 in both soils. Meanwhile, at dose 1, even though $^{14}C-TCAB$ was detected in trace on tlc and glc in both soils, the amount does not exceed 2 to 3% of the radioactivity extracted, corresponding to 0.05 to 0.1% of the initial radioactivity. 4) The rate of breakdown of $^{14}C-TCAB$ into $^{14}CO_2$ ranged from 0.05 to 0.20% in all the four soils. Most of the applied $^{14}C-TCAB$ remained intact after 3 months, not producing any detectable metabolites. 5) The fact that much more $^{14}C-TCAB$ was adsorbed to alkaline soil than to the other soils strongly indicates that in alkaline condition trans-isomer was converted tocisisomer which has the higher adsorption affinity than the former.
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이재구,Lee, Jae-Koo The Korean Society of Environmental Agriculture 1984 한국환경농학회지 Vol.3 No.1
Alachlor의 토양중 분해산물인 2,6-diethyl-N-(methoxymethyl) acetanilide(분해산물 1)와 2-hydroxy-2',6'-diethyl-N-(methoxymethrl) acetanilide (분해산물 2)를 합성하였다. 분해산물 1은 실온에서 아연분말 존재하에 alachlor를 3N-염산과 반응시켜서 얻었고 분해산물 2는 alachlor를 중탄산소다의 포화용액과 $90^{\circ}C$에서 78시간 반응시켜 합성하였다. 분해산물 2는 $5{\times}10^{-4}M$와 $1{\times}10^{-3}M$의 농도에서 특히 어린벼에 alachlor와 거의 같은 독성을 보인 반면 분해산물 1은 그 약효를 상실하였다. 따라서 alachlor 구조중의 염소원자를 수산기로 치환해도 alachlor의 식물독성은 별 영향을 받지 않으나 수소원자로 치환할 경우는 영향을 받는 것으로 보인다. Two of the degradation products of alachlor in soil. product 1, 2,6-diethyl-N-(methoxymethyl) acetanilide and product 2,2-hydroxy-2',6'-diethyl-(methoxymethyl) acetanilide were synthesized from alachlor reacting with 3N-hydrochloric acid in the presence of zinc powder at room temperature and a saturated sodium bicarbonate solution at $90^{\circ}C$ for 78 hr, respectively. At the concentrations of both $5{\times}10^{-4}M\;and\;1{\times}10^{-3}M$, product 2 exhibited almost the same phytotoxicity to rice seedlings, in particular, as alachlor, whereas product 1 lost its phytotoxic effectiveness. It seems that substitution of chlorine atom by hydroxyl group did not affect the phytotoxicity of alachlor, whereas substitution by hydrogen atom did.
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초등학생의 아침운동이 IGF-1, BDNF 및 체력에 미치는 영향
이재구(Lee, Jae-koo),강병용(Kang, Byung-Yong),김대수(Kim, Dae-Soo),정동근(Jung, Dongkeun) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.1
The purpose of this study was to investigate whether voluntary exercise in the morning increases IGF-1 and brain-derived neurotrophic factor concentration in the child for 13 weeks. A total of 18 students(13.4±1.6yrs. aged, 157.0±5.1cm height, 47.3± 17.1kg weight) in elementary school were recruited in this study, and divided into control and exercise group, respectively. They performed a 5 days exercise program, composed mainly of different and moderate intensity bouts. After 13 weeks of program, there were not significant difference between two groups among the all blood lipid variables. Height and weight in exercise group, however, increased significantly after exercise program(p<001), not in control group. In fitness variables muscle endurence in exercise group, also, increased significantly after 13 weeks training(/p<.001). One of growth factor, IGF-1 level, was significantly increased 31.5% in exercise group after 13 weeks training(p<001), In case of BDNF, main factor in this study exercise group showed significantly 35.2% higher than those of before 13 weeks training(/p<.001), but control group lowered significantly 11.8% after 13 weeks duration/pC005). There was a significantly different between two groups after training program In conclusion even though the exercise program applied in this study was too enough intensity to induce a positive results on the blood lipid profiles and body composition, it was recognized that exercise volume loaded by different physical activity was optimal to increase the serum IGF-1 and BDNF level in blood for child.
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라벤더 정유 흡입이 운동 스트레스와 운동 수행 시 뇌파의 변화양상에 미치는 영향
이재구(Lee, Jae-Koo),강병용(Kang, Byung-Yong),류병열(Ryu, Byoung-Yeoul) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.5
The purpose of this study was to investigate the effects by the inhalation of lavender essential oil on the changes of electroencephalogram(EEG) patterns under cognitive and physical stress situation in both male and female university students. A total of twelve university students(males = 6; females = 6) were recruited in this study. In order to measure EEG patterns, EEG electrodes were attached at the prefrontal(Fp1, Fp2), frontal(F3, F4), temporal(T3, T4) and parietal(P3, P4) areas under the international 10-20 system, and EEG patterns measured for 3 min per each period of immediately before the study, immediately after the inhalation of lavender essential oil for 2 min, immediately after cognitive stress for 2min and immediately after physical stress through treadmill running for 10 min, respectively. There were trends of the decrease of relative α and β waves with the increase of relative θ wave suggesting the relaxing effect of this aromatherapy, and also, trends of the increase of relative α wave immediately after cognitive and physical stress stimuli, suggesting the stress reduction effect of this intervention. In addition, these trends was more noticeable in female university students than male university students. With respect to repetitive measure ANOVA test, the sex and time interaction effects were observed in EEG patterns of some brain areas. In other words, the effects of lavender essential oil under cognitive and physical stress situation indicated sex-specific differences. Thus, further studies will be required to define the precise mechanism behind this sex-specific effects of lavender essential oil.
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이재구(Lee, Jae-Koo),강병용(Kang, Byung-Yong),조광현(Jho, Kwang-Hyun) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.5
The purpose of this study was to confirm a korean adulthood characteristics of the participate rates for regular exercise and prevalence rate to the hypertension, MI, DM, Arthritis, and mental health. Methods: For the purpose to accomplish was analyzed the korean 5,349 numbers (male 2,272, female 3,077, ranged 30-99 year old) from the data of Korea National Health and Nutrition Examination Survey V (2011 - 2012). Results in this study are as follow. 1) Prevalence rates to the hypertension patients were approximately 19% in the both men and women. No regular exercisers in them were 67.11% in men, 77.0% in women, but regular exercisers only 32.08% in men, 22.36% in women. 2) Prevalence rates to the MI patients showed 1.13% and 0.63% in male and female, respectively. Male 72.56% and female 74.31% keeping MI were not participated in regular exercise at all. 3) 8.32% in men and 6.81% in women were prevalenced into DM patients. Among them, 67.52% in men and 79.19% in women were not involved at exercise activity. 4) Male 2,91% and female 15.45% among arthritis patients were taken a prevalence. among prevalenced, 55.10% and 73.50% in men and women respective did not exercise regularly. Lastly, In case of mental health like depression, stress, suicide intension, prevalence rates showed that women were higher than those of men. In conclusion, Prevalence rates to the korean chronic diseases were highly maintained, and lots of patients keeping their disease did not usually participated in regular exercise. It"s not good at personal health quality of life as well as budget in the national medical cost.
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