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자연계로부터 Patulin 생성 Penicillium sp.의 분야에 관한 연구
김동술,정덕화,김성영,정선희,강성조,전향숙 한국환경보건학회 1993 한국환경보건학회지 Vol.19 No.3
To study the prevention of mycotoxin contamination, a large number of sample sources were collected, and Penicilliurn sp. were isolated. TLC and HPLC methods were applied to confirm the patulin producing abilities of isolated strains. From 321 sample sources such as fruit (46), rice (31), corn (19), barley (22) and soil (38), 203 strains of Penicilliurn sp. were isolated. By the result of TLC, 21 strains were assumed to be patulin producing strains, but as a result of HPLC, only 17 strains produced patulin. Among them, E-219 strain showed highest patulin level as 0.12 mg/ml broth.
곡류중 Ochratoxin A의 검색을 위한 면역분석법에 관한 연구
김동술,정덕화,이용욱 한국환경보건학회 1994 한국환경보건학회지 Vol.20 No.3
We established ELISA method which is more rapid and safe than conventional analytical method, and then analyzed concentration of ochratoxin A in the rices by ELISA method. The results were as follows: 1. Since ochratoxin A molecular does not contain the group for coupling reaction, it was first proposed to have the function of an antigen. As a result of conjugation of ochratoxin A-BSA derivatives, one molecular of BSA was conjugated with 13 moleculars of ochratoxin A. 2. On the basis of established ELISA to apply for immuno analytical method of ochratoxin A, the minimal level of detection by ELISA method was at 0.5 ppb. 3. Rices (42) were collected from homes of Kyoungnam districts through November 1992 to December 1992, as a result of analysis, two of these were positive. Rice samples of R-1 and R-9 represented ochratoxin A levels of 6.0 ng/g and 10 ng/g, respectively.
영남지역 곡류로부터 Ochratoxin A 생성균의 분야에 관한 연구
김동술,정덕화,조태웅,여명재,강진순 한국환경보건학회 1994 한국환경보건학회지 Vol.20 No.3
To isolate the ochratoxin A producing strains from agricultural products and soil in Youngnam districts, rice (37), unhulled rice (10), barley (20), unhulled barley (3), corn (21), soil (26), meju (25), malt (8), soybean (26) and peanut (15) were collected from homes and markets of Youngnam districts through September 1992 to November 1992. 187 strains of Aspergillus spp. and Penicillium spp. were isolated from 191 samples. As a result of screening by TLC, 36 strains expressed fluorescent spot and a same Rf value of standard ochratoxin A, and 9 strains of them were identified as ochratoxin A producing strains by HPLC.
ELISA법에 의한 mouse의 혈청 및 조직중의 T-2 toxin의 검색
김동술,송재영,정덕화 한국환경보건학회 1996 한국환경보건학회지 Vol.22 No.1
In order to detect the T-2 toxin accumulation in the animal tissues, T-2 toxin, produced by Fusarium sporotrichioides M-1-1, was injected to mouse by 0, 1 and 2 mg per kilogram of body weight, respectively, and T-2 toxin extracted from serum and organs were analyzed by the indirected competitive ELISA. The indirect competitive ELISA established in the laboratory can be check less than 0.1 ppb level of T-2 toxin and average recovery of T-2 toxin spiked was 80~113% in animal samples such as serum, liver and kidney. After 6 weeks of treatment with 2 mg of T-2 toxin per kg body weight, T-2 toxin was accumulated in serum (133.0 ng/ml), liver(1.4 ng/g) and kidney(14.3 ng/g) of mouse injected with 2 mg of toxin per kg body weight