State Indicator of Water Quality for Surface Water and Groundwater in Agriculture

Min-Kyeong Kim,Goo-Bok Jung,An-Sung Ro,Seung-Chul Choi,Won-Il Choi,Eun-Jeong Kim,Jong-Eun Lee,Yeo-Uk Yun,Kab-Cheol Kim,Do-Young Ko,Byeong-Ho Kim,Hyeon-Ji Kim,Sang-Jo Park,Seong-Tae Lee,Jae-Young Heo,S 한국토양비료학회 2015 한국토양비료학회지 Vol.48 No.5

Indicators of environmental conditions qualitatively and quantitatively describe the state of the environment and natural resources, and the OECD (Organization for Economic Cooperation and Development) has initiated and suggested AEIs (Agri-Environmental Indicators) to assess trends over time of the effects of agriculture on the environment and the effectiveness and efficiency of agricultural and environmental policy measures since 1990’s. This study aims to develop the state indicators of water quality for agricultural water, surface and groundwater, to evaluate the environmental impacts of agricultural activities and policies by qualifying the environmental levels of a nation. Status indicators were calculated according to the agricultural water quality standards of OECD and Korea, and their trends were analyzed over time. Particularly, nitrate(NO₃<SUP>-</SUP>) status indicators of ground water in 2013 were significantly lower than the ones in 2000. Overall, the water quality indicators of surface water in 2013 were higher than the ones in 2012, except for pH and DO. The groundwater quality indicators in 2013 were lower than those of previous years. The optimal management indicators were calculated to assess agricultural surface water and groundwater quality. The findings of this study indicated that the state indicators could play a significant role to establish policies and procedures for managing and conserving water resources. This study also discussed water pollution caused by agricultural and industrial effluents.

한국인 임신부에 있어서 영양소의 역가측정

최기영,김웅철,박기현,배도환 중앙대학교 의과대학 의과학연구소 1982 中央醫大誌 Vol.7 No.2

Animal and human studies indicated that inadequate diet for a prolonged period during pregnancy could injure mother, child, or both. In order to prevent this problem, maternal nutyitional status during pregnancy is very important and the evaluation of nutrition during pregnancy have been preceded by many authors in another countries. In Korea, nutrient intake studies of the pregnant women and nutrition surveys in adult by biochemical method have been performed, but there are no data nutrition surveys of Korean pregnant women have been made by biochemical method. In this regard, an exact biochemical titer of the nutrients and the degree of nutrient deficits in Korean pregnant women are needed. In this study, the mean titer of some nutrients and the degree of nutrient deficits by biochemical method in Korean pregnant women were assessed. The objected materials were consisted of 30 cases which had visited the departmant of Obstetrics & Gynecology, Chung Ang University Hospital for antenatal care(32wk-40wk) from March, 1981 to June, 1981. The cases with twin pregnancy, and the cases complicated with materal chronic wasting disease, diabetes, hydroamniosis, hypertensive disorder in pregnancy were excluded in this study. The results were as follows: 1. Mean titer of 6 hours urine execretion of thiamine, riboflavin and N'-methylniacinamide in Korean pregnant women was 44㎍, 466㎍, and 2.33㎎. 2. Mean titer of serum vitamin A, carotene, vitamin C, total protein, calcium, phosphorus, iron and total lipid was 48.1㎍, 154.7㎍, 0.8㎎, 7.0g, 9.8㎎ 3.5㎎, 93㎍, and 578㎎. 3. Percentage of nutrient deficits in Korean pregnant women based on the mean titer of Korean adults was as follow; thiamine-20%, N'-methylniacinamide-7%, total protein-5%, calcuim13%, iron-19%. 4. No cases were deficient in riboflavin, carotene, phosphorus, total lipid and the mean titer of riboflavin and carotene in Korean pregnant women were high compared with thw mean titer of Korean adults.

도토리澱粉이 흰쥐의 脂質代謝에 미치는 影響

崔到点,金載營,高鎭福 新羅大學校 1984 論文集 Vol.16 No.-

In an attempt to observe the lipid metabolism of acorn starch, five different diets were made: one rice diet (control group) and four diets in which acorn starch was mixed with rice at the rate of 10%, 20%, 30% and 40% respectively. These five diets controlled in such ways are the same level in calorie and protein content. The acorn starch used was cleared from tannin by being heated 20 hours. These diets were each fed to different groups of male albino rats for 6 weeks, during which various items were measured on these rats such as total lipid, total cholesterol, triglyceride, phospholipid and HDL-cholesterol contents. The results obtained through this study are summarized as follow: The content of total lipid in liver of each group was lower in the 2nd week, and that of 30% acorn starch group was lower in the 4th week, and that of 20% acorn starch group was lower in the 6th week, compared with control group. The content of total cholesterol in liver of each group except 10% acorn starch group was lower than that of the control group in the 2nd week, but in the 4th and the 6th week, there was no particular difference in content between each group and the control group. The centents of total lipid, triglyceride, phospholipid, total cholesterol and HDL-cholesterol in serum are almost the same between each group and the control group during each period of feeding. Therefore acorn starch diets mixed with rice at the rate of 10%, 20%, 30% and 40% had little effect on the serum lipid contents.

Dipyrazinium Trichromate에 의한 알코올류의 산화반응에 대한 메카니즘 연구

최선도,박영조 三陟大學校 産業科學技術硏究所 2004 産業科學技術硏究論文集 Vol.9 No.1

Dipyrazinium trichromate[(C₄H₄N₂H)₂Cr₃O_(10)) was synthesized by the reaction of pyrazine with chromium(Ⅵ) trioxide in 6M HC1. dipyrazinium trichromate structure was verified by IR, EA and ICP. The oxidation of benzyl alcohol by dipyrazinium trichromate in various solvents showed that the reactivity increased with the increase of the dielectric constant's order: cyclohexen < chloroform < acetone < acetonitrile. In the presence of acid, dipyrazinium trichromate oxidized the substituted benzyl alcohols in N,N-dimethylformamide. The Hammett reaction constant ρ was -0.69 at 303K. The observed experimental data was used to rationalize the hydride ion transfer in the rate-determining step.

싸이리스터 PWM정류기를 이용한 유도가열장치

崔泳道,李景彬,韓炳文 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-

This paper proposes a new induction heating system composed of a thyristor PWM rectifier with a resonant commutation circuit. The operation of proposed system was first analyzed by a theoretical approach with equivalent circuits. And its verification was performed by computer simulations with EMTP. The proposed system can provide a solution for the power factor problem of the existing high-power induction heating system, which uses the line-commutated thyristor bridge in rectifier side.

직류 서보 전동기의 위치 제어를 위한 오차 적응 퍼지 PI 제어에 관한 연구

최우진,임영도,이준탁 東亞大學校 1994 東亞論叢 Vol.31 No.1

In this paper, the design technique of Error Adaptive Fuzzy PI controller with the aim to achieve the accuracy and the better robustness than the conventional PI controller and the Fuzzy controller presented. In the proposed Error Adaptive Fuzzy PI controller with fuzzy reasonings; a P controller mainly used to improve the transient response, and an I controller is mainly used to excute an acrate regulation action in steady state. Using this proposed alogorithm, the position controller of the DC servo system is implemented on 80486 micro processor with DT-2801 data acqusition board. Comparing to the conventional Fuzzy controller which is based on human being's inspection and intelligence or comparing to the convetional PI controller, the proposed Error Adaptive Fuzzy PI controller has the better robust dynamics against load disturbances.

성인의 경부 전면 중앙부위에서 발생한 기형종 1예

최월용,정효진,채종인,하태인,정상렬,이광재,채병도,최영식 고신대학교 의학부 2004 高神大學校 醫學部 論文集 Vol.19 No.1

Teratomas are embryonal neoplasms that show characteristics of three germ cell layers(ectoderm, mesoderm, and endoderm). They are distributed in the following regions: sacrococcygeal(57%), gonadal(29%), mediastinal(7%), cervical(3%), retroperitoneal(4%), and intracranial(3%) regions. Non-gonadal treatomas present in infancy whereas gonadal are seen in adolescence. Especially, teratomas that occurred in midline neck of adult are very rare and are confused with thyroglossal duct cysts, cystic hygromas, and thyroid tumors. We report, along with the review of appropriate literature, a case of histopathologically confirmed benign teratoma in the midline neck of a 33 years old woman.

Cr(Ⅵ)-헤테로고리 착물에 의한 알코올류의 선택적 산화반응

최선도,박영조 三陟大學校 産業科學技術硏究所 2004 産業科學技術硏究論文集 Vol.9 No.1

Pyrazinium chlorochromate[C₄H₄N₂HCrO₃Cl]and isoquinolinium dichromate[(C_(9)H_(7)NH)₂Cr₂O_(7)] were synthesized, which were used to oxidize benzylic alcohol, allylic alcohol, primary alcohol and secondary alcohols in DMF to give aldehyde of each compound. Their structures were verified by IR, EA and ICP. The oxidation of alcohols was examined by isoquinolinium dichromate and pyrazinium chlorochromate in DMF. As a result, isoquinolinium dichromate and pyrazinium chlorochromate were found as efficicent oxidizing agents that converted benzylic alcohol, allylic alcohol, primary alcohol and secondary alcohols to the corresponding aldehydes or ketones. The selective oxidation of alcohols was also examined by isoquinolinium dichromate and pyrazinium chlorochromate in DMF. isoquinolinium dichromate and pyrazinium chlorochromate were selective oxidizing agents of benzylic alcohol, allylic alcohol and primary alcohol in the presence of secondary alcohols.

재조합 균주 Bacillus subtilis LKS88에 의한 Streptomyces albus KSM-35 Amylase의 생산조건

최원진,유도진,이재우,소명환,김영배 한국식품영양학회 1998 韓國食品營養學會誌 Vol.11 No.4

Streptomyces albus KSM-35의 amylase의 유전자를 Bacillus subtilis LKS88에서 발현시킨 균주를 사용하여 amylase의 생산에 미치는 몇가지 요인들을 조사하였다. 본 실험에 사용한 탄소원들중에서 sodium citrate와 왕겨의 효소 생산량이 가장 높았고, 이들을 1:1의 비율로 혼합하여 첨가하였을 때 효소의 생산량은 대조군으로 사용한 가용성 전분에 비하여 20배 이상 증가하였다. 질소원으로 대두박을 사용하였을 경우 yeast extract의 첨가량을 줄이면서 효소의 생산량을 증가시켰다. 배양을 위한 초기 pH를 60으로 조절하고 SDS를 0.01%첨가하였을 때 대조구조보다 높은 효소 생산량을 나타내었다. Bacillus subtilis LKS88 (pASA240)을 sodium citrate와 왕겨 각각 1.5%, K_2HPO_4 0.66%, yeast extract 0.3%, 대두박 0.7%, SDS 0.01% 및 초기 pH를 6.0으로 조절한 배지에서 37℃에서 배양시 최대 효소 활성은 배양 후 36시간에서 나타났으며 이때 효소 활성은 56.6 U/ml이었다. The effects of culture conditions on the production of amylase expressed by Bacillus subtilis LKS88 with a cloned gene from Streptomyces albus KSM-35 were investigated The production of amylase was increased significantly by using sodium citrate and rice hull as a carbon source. In addition, the use of a mixture of sodium citrate and rice hull(1:1) resulted in increase of enzyme production by 20-fold when compared to that of soluble starch. The soybean meal as the nitrogen source could be partially replaced with yeast extract without changing the enzyme production yield. The amylase production was also increased by adjusting initial pH to 6.0 or by adding 0.01% SDS. Maximum amylase production was observed in the medium containing 1.5% sodium citrate, 1.5% rice hull, 0.7% soybean meal, 0.3% yeast extract, 0.66% K_2HPO_4, 0.05% MgSO_4·7H_2O, 0.08% CaCl_2·2H_2O, 0.01% SDS with initial pH of 6.0. The maximum yield of amylase reached 56.6 U/ml when B. subtilis LKS88(pASA 240) was cultured at 37℃ for 36 hr.

흰쥐 적출 대동맥에서의 알파-1 아드레날린성 수용체 탈감작 현상

최도희,한형수,박정숙,김중영 慶北大學校 醫科大學 1994 慶北醫大誌 Vol.35 No.4

목적 : 흰쥐의 적출 대동맥 절편에서 알파-1 아드레날린성 수용체의 탈감작에 따른 수축력 변화를 확인하고 수축력 변화와 관련된 요인들과의 관계를 검정하기 위해 실시되었다. 대상 및 방법 : Sprague-Dawley rat의 대동맥을 적출하여 알파-1 아드레날린성 수용체 선택적 효현제인 phenylephrine으로 탈감작시킨 뒤 수축력과 이완력의 변화를 확인하였다. 결과 : Phenylephrine에 의한 수축력은 phenylephrine 탈감작에 의해 감소되었다. EDRF와 관련이 있는 이완제인 acetylcholine과 histamine에 의한 이완반응은 phenylephrine 처치로서 변화를 볼 수 없었으나 sodium nitroprusside에 의한 이완은 항진되었다. 탈감작현상은 LNMMA와 methylene blue처치로 인해 영향을 받지 아니하였다. KCl에 의한 수축은 phenylephrine 탈감작으로 억제되었으나 phorbol ester에 의한 수축은 phenylephrine 탈감작으로 인해 영향을 받지 아니하였다. 결론 : phenylephrine에 의해 나타나는 알파-1 수용체 탈감작에 따른 수축력 감소 현상은 이완 작용의 변화와는 관련이 없으며 수축기전의 변화, 특히 calcium에 대한 반응성의 변화에 기인함을 시사하였다. We evaluated alpha 1 adrenergic receptor desensitization and decreased contractility in isolated rat aorta. 4 hour exposure to 10^-5M of phenylephrine (phenylephrine exposure) decreased phenylephrine(10^-10 to 10^-5M)-induced contractility. Phenylephrine exposure had no effect on the relaxation by NO releasing agents, such as acetylcholine(10^-9 to 10^-5M) and histamine(10^-8 to 10^-4M), but enhanced nitroprusside(10^-10 to 10^-6M)-induced relaxation. Phenylephrine-induced desensitization was not altered by the presence of methylene blue and N-monomethyl-L-arginine. After phenylephrine exposure KCl-induced contractility was decreased but phorbol ester-induced contractility was not changed. From these results we can assume that prolonged phenylephrine exposure alter calcium-dependent contraction mechanism and involve in alpha 1 adrenergic receptor desensitization-mediated decrease in contractility.