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PhosBholipase D에 의한 비천연 인지방질의 합성: IIl 포스타티딜기 전이반응에 미치는 유기용매의 효과
정의호,이해익이상영 한국생물공학회 1991 KSBB Journal Vol.6 No.3
This research was carried to investigate the effects of several organic solvents on the enzymatic transphosphatidylation in emulsion and two-phase solvent systems. The solvents having a similar dielectric constant with diethylether were effective for the enzyme activity. Diethylether and butylacetate were the most effective solvents, when added 12-15%(v/v) and 10-40%(v/v), respectively, for the synthesis of phosphatidylglycerol, phosphatidylethyleneglycol and phosphatidylpropyleneglycol. In the emulsion system, the size of ovolecithin liposome was increased and the clearness of the phospholipid bilayer was reduced as increasing the diethylether concentration. In the twophase solvent system, the rapidest reaction was obtained when water-organic solvent ratio was close to 1. The ratio of aqueous phase. however, should be lowered to 37% to gain the sole product of transphosphatidy1ation, without phosphatidohydrolysis.
남한강상류수계의 (南漢江上流水系) 수질특성에 관한 조사연구
이해금,정의호,홍사욱 ( Hae Keum Lee,Eui Ho Jeng,aS Uk Hong ) 한국하천호수학회 1979 생태와 환경 Vol.12 No.1·2
The physicochemical water quality was investigated in the upper parts of south Han river and it`s tributaries during from January to December, 1977. The concentration of dissolved salts in those river water was going to increase gradually as lower the river flow down. Moreover, after the river water passed through the lime stone region the concentration of pH, Ca^(++), Mg^(++), SO₄^(--) and Alkalinity were more increased. From the seasonal variation of water qualities the concentration of dissolved salts in those river was found most low level in April but it was found higher level in the January, February and June. In the Ok dong river which was suffer by the pollution of waste water from mine. Considerable amount of Na and SO₄^(--) was found in it. and likely to differ entirely from another natual river for the aspect of water qualities. The concentration of dissolved oxygen was abundant in the water of those rivers and have sustained a saturation state of oxygen almost all year round.
임계댐 예정지역내 하천수 수질에 관한 이화학적 조사연구
이해금,정의호 ( Hae Keum Lee,Eui Ho Jeong ) 한국하천호수학회 1977 생태와 환경 Vol.10 No.3·4
The physicochemical investigation of water quality of the streams in the area where dams are to be constructed has been carried out from 5th to 7th, August 1977. The data for the streams of Golji and Imgye in Imgye Myeon, Jeongson Gun, Jeoncheon in Bugpyeong Eup, Samcheok Gun are obtained as follows. 1. The pH was 7.70-7.75 for Jeoncheon whereas 8.25-8.40 for Golji suggesting the value is relatively higher than others. 2. The concentration of Ca^(++), Mg^(++) and SO₄^(--), and the alkalinity are high in Golji and the concentration of Na^+, C1^- and SiO₂, are high in Jeoncheon. 3. In all area investigated, Ca^(++) is positively correlated to Mg^(++), total hardness, alkalinity and pH but negatively correlated to SiO₂. 4. The total hardess of Golji is 91-119.8㎎/ℓ which is the highest and that of Jeoncheon, 17.5-36.9㎎/ℓ is indistinguishable to the value obtained from the north Han river basins. 5, The NO₂-N and NH₄-N are scarcely detected in all area investigated, indicating pollution in the streams, and the amount of NO₃-N 0.2-4.43㎎/ℓ, detected in the area are similar to the value of the other natural stream, suggesting that the nitrogen is originated from earth. 6. Based upon above results, the water quality of the streams investigated is found to fit for aerobic aquatic living things, with high DO and little artificial pollution.
이해금,정의호,김기철,이태준,심태흠,유미정 한국식품위생안전성학회 1992 한국식품위생안전성학회지 Vol.7 No.4
This study was carried out to determine residues of 17 pesticides and provide basic information on dietary safety of 35 kinds af Kangweon-do agricultural products. Residual levels of organochlone and organophosphorus pesticides were analyzed by using GLC-ECD and GLC-NPD, respectively. A total of 157 agricultural products of Kangweon-do were analyzed. At least one kind of pesticide residues were detected in 48.4% of the analyzed samples and two or more kinds were found in 15.3%. Residue of Captan was detected in 43 samples of 81 agricultural products which was 53.1%. But residues of Endrin, Captafol, Parathion, Fenitrothion, Fenthion and EPN were not found in the all samples tested. Ranges of the pesticide residue levels detected were ND-0.142 ppm for organochosphorus pesticides, ND-0.075 ppm for organophosphorus pesticides and ND-1.067 ppm for Captan. Results of this monitoring study demonstrated that pesticide residue levels in Kangweon-do agricultural supply were generally well below regulatory limits.