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잉어에 의한 Diazinon 및 Fenitrothion 의 생물농축
이서래,전혜경,유병선 한국환경농학회 1984 한국환경농학회지 Vol.3 No.1
잉어에 의한 두 가지 有機燐系 살충제의 生物濃縮을 追求하기 위하여 실험실 조건하에서 수행한 실험결과 는 다음과 같다. 1) Diazinon과 fenitrothion의 1 ppm농도에서 잉어에 의한 生物濃縮係數는 24시간후에 각각 31과 57이었다. 이 係數는 잉어의 部位에 따라 달리 나타났는 바 內臟>기타 부위>아가미>筋肉의 순서로 나타났다. 2) 잉어를 fenitrothion의 세가지 농도에 28일간 노출시킨 결과 生物濃縮係數는 96∼138로 나타났는 바 水中농도가 높을수록 적게 나타났다. Fenitrothion의 生體內 濃縮은 계속적으로 일어났으며 組織內 농도가 약 3.5ppm에서 平衡에 도달하였다. A freshwater fish carp(Cyprinus carpio) was exposed to two organophosphorus insecticides in laboratory to investigate the potential of its bioconcentration. The results are summarized as follows: Bioconcentration factor of diazinon and fenitrothion after 24-hour exposure at 1 ppm concentration was 31 and 57, respectively, for the whole fish. The factor varied among different tissues of the fish in the decreasing order of viscera>rests>gills>muscle. When the fish was exposed to fenitrothion for 28 days at three different concentrations of 6, 30 and 150 ppb, bioconcentration factor in the whole fish ranged from 96 to 138, with a decreasing tendency at higher water concentration. The pesticide was continuously absorbed by the fish, but reaching an equilibrium at the tissue concentration of about 3.5 ppm.
고구마의 저장 및 이용에 관한 연구 : 제3보 : 감마선조사와 고구마의 저장 (Ⅲ) Gamma - Irradiation and Storage of Sweetpotatoes
이서래,김호식,최언호,박노풍 한국농화학회 1968 Applied Biological Chemistry (Appl Biol Chem) Vol.10 No.1
The effects of ^(60)Co-γ radiation on the change of composition and susceptibility to soft rot during the storage of sweetpotatoes and the radioresistance of spores of the soft rot fungus were investigated and the following results were obtained. 1) Gamma-irradiation of sweetpotatoes caused the increase in water-soluble sugar content and the decrease in ascorbic acid content during the storage. 2) The rate of oxygen uptake in sweetpotato slices becomes higher as the dose increases. But the oxygen uptake in slices irradiated with higher doses decreases along with the color change as the time passes. 3) Irradiation with high doses (above 2.5×10^5 rad) brought about the increased susceptibility to soft rot decay as the chilling injury did in the storage of sweetpotatoes. 4) Average lethal dose for the spores of Rhizopus nigricans was 3.0×10^5 rad and the complete death required the level of 1.25×10^6 rad.