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감나무탄저병에서 분리한 Gloeosporium kaki의 2계통
崔貞植,李貴宰,金炯武,蘇仁永 全北大學校 1993 論文集 Vol.35 No.-
A anthracnose symptom at persimmon tree was found out in the field, Chonju in Chonbuk province and Haenam Experiment Station in Chonnam province in 1991 and 1992. The cultivated character and the pathogenicity of the fungi were as follows : These fungi, Gloeosparium kaki which were isolated from the anthracnose were classified into strain Ⅰ and Ⅱ by the cultivated characteristics. The size of conidia in strain Ⅰ was 22.5 × 6.82 ㎛ and that of strain Ⅱ was 20.3 × 6.2 ㎛. In a PDA, the colour of strain I was light brown and made a central zone. The colour of strain Ⅱ was black brown and deep grey and didn't make a central zone. The pathogenicity of strain Ⅰ was similar to strain Ⅱ in the leaf, branches.
Choi, Jae-Seok,Lee, Young-Jun,Kim, Tae-Hyung,Lim, Hyun-Jung,Ahn, Mee-Young,Kwack, Seung-Jun,Kang, Tae-Seok,Park, Kui-Lea,Lee, Jae-Won,Kim, Nam-Deuk,Jeong, Tae-Cheon,Kim, Sang-Geum,Jeong, Hye-Gwang,Lee Korean Society of ToxicologyKorea Environmental Mu 2011 Toxicological Research Vol.28 No.2
Brominated flame retardants (BFRs) are present in many consumer products ranging from fabrics to plastics and electronics. Wide use of flame retardants can pose an environmental hazard, which makes it important to determine the mechanism of their toxicity. In the present study, dose-dependent toxicity of tetrabromobisphenol A (TBBPA), a flame retardant, was examined in male prepubertal rats (postnatal day 18) treated orally with TBBPA at 0, 125, 250 or 500 mg/kg for 30 days. There were no differences in body weight gain between the control and TBBPA-treated groups. However, absolute and relative liver weights were significantly increased in high dose of TBBPA-treated groups. TBBPA treatment led to significant induction of CYP2B1 and constitutive androstane receptor (CAR) expression in the liver. In addition, serum thyroxin (T4) concentration was significantly reduced in the TBBPA treated group. These results indicate that repeated exposure to TBBPA induces drug-metabolising enzymes in rats through the CAR signaling pathway. In particular, TBBPA efficiently produced reactive oxygen species (ROS) through CYP2B1 induction in rats. We measured 8-hydroxy-2'-deoxyguanosine (8-OHdG), a biomarker of DNA oxidative damage, in the kidney, liver and testes of rats following TBBPA treatment. As expected, TBBPA strongly induced the production of 8-OHdG in the testis and kidney. These observations suggest that TBBPA-induced target organ toxicity may be due to ROS produced by metabolism of TBBPA in Sprague-Dawley rats.
감나무 가지마름 (枝枯) 병 症狀에 關與하는 病原菌의 分離
金炯武,李貴宰,蘇仁永,金又喆,崔貞植 전북대학교 농업과학기술연구소 1992 農大論文集 Vol.23 No.1
A black spot and dieback symptom did occur on persimmon trees in Chonbuk plovince in August 1991. Isolated fungi from stems and twigs were Gloeosporium sp., Alternaria sp., Fusarium sp., Penicillium sp., and not-identification fungi, The pathogenicity of Isolated fungi were as follows : the leaves appeared with the black spot symptom by genus of Pestalotia species, Gloeosporium species, Alternaria species and four not-identification fungi, and the stems appeared with the exetreme dieback symptom by genus of Pestalotia sp., Gloeosporium sp. and two not identification fungi.
Study of Optimized Hip Implant Development for Hip Implant in Total Hip Replacement
Kim, Hyung-Jin,Chu, Jun-Uk,Han, Sung-Min,Choi, Kui-Won,Yoo, Jeong-Hoon,Youn, In-Chan 한국정밀공학회 2011 International Journal of Precision Engineering and Vol.12 No.4
A hip implant re-operation is usually related to the service life of the component, as determined by its material properties, or a loosening of the hip implant resulting from a poor alignment with adjacent bone tissues. These issues invariably arise from the use of standardized products even though each patient differs in terms of anatomical parameters of their hips. To deal with such challenges, customized hip implants are needed that are designed to optimize the alignment with the hip according to the anatomical differences of individual patients. Therefore, this study presents an optimal joint restoration system optimized to the needs of the individual user as regards developing treatment technology to restore the function of an aged joint. A hip implant usually consists of a body and neck, thus, among 15 anatomical basic parameters of the human femur, 8 are selected as hip implant design input parameters to focus on the most critical elements for a hip implant in the case of a total hip replacement. In addition, specific design input parameters are proposed including a wiring hole and distal slotted part, and analyzed using a finite element analysis method. The anatomical parameters in relation to a variation of the neck length are also analyzed in the same manner. To confirm the design parameters enabling normal hip implantation, a maximum neck shaft angle and length threshold model is implemented on the basis of the statistical average femoral configuration of Koreans and verified by a FEM (Finite Element Method) fatigue analysis. An analysis protocol aligned with international specifications as applied and a threshold for each 4 the aforementioned parameters set up to derive optimal design parameters. Finally, as a pre-operation planning tool, the parameters of choice are extracted from an X-ray femur image and reconstructed into a 2D/3D CAD model using a customized hip implant design software program, and the model stability is verified using a static FEM.
감나무 가지마름病에서 分離한 Pestalotia kaki의 2 系統
李貴宰,田吉亨,金炯武,蘇仁永,崔定植 전북대학교 농업과학기술연구소 1994 農大論文集 Vol.25 No.1
A black spot and die-back symptoms were severely occurred on the branch of young persimmon tree at Chonju and Haenam between 1991 and 1992. The Pestalotia kaki isolated from symptoms were investigated in cultural character and pathogenicity. Pestalotia kaki was isolated from the black spot and die-back symptoms. Pestalotia kaki was classified into the strain I and Ⅱ by cultural character. The color of mycelium on the PDA, the strain l was white and turned yellowish in the center, and the strain Ⅱ was white. Conidia formed concentric Bones in the strain Ⅱ, and scattered in the strain Ⅰ . Pathogenicity of the strain I and Ⅱ was simillar.
Jae Seok Choi,Young Jun Lee,Tae Hyung Kim,Hyun Jung Lim,Mee Young Ahn,Seung Jun Kwack,Tae Seok Kang,Kui Lea Park,Jaewon Lee,Nam Deuk Kim,Tae Cheon Jeong,Sang Geum Kim,Hye Gwang Jeong,Byung Mu Lee,Hyun 한국독성학회 2011 Toxicological Research Vol.27 No.2
Brominated flame retardants (BFRs) are present in many consumer products ranging from fabrics to plastics and electronics. Wide use of flame retardants can pose an environmental hazard, which makes it important to determine the mechanism of their toxicity. In the present study, dose-dependent toxicity of tetrabromobisphenol A (TBBPA), a flame retardant, was examined in male prepubertal rats (postnatal day 18) treated orally with TBBPA at 0, 125, 250 or 500 ㎎/㎏ for 30 days. There were no differences in body weight gain between the control and TBBPA-treated groups. However, absolute and relative liver weights were significantly increased in high dose of TBBPA-treated groups. TBBPA treatment led to significant induction of CYP2B1 and constitutive androstane receptor (CAR) expression in the liver. In addition, serum thyroxin (T4) concentration was significantly reduced in the TBBPA treated group. These results indicate that repeated exposure to TBBPA induces drug-metabolising enzymes in rats through the CAR signaling pathway. In particular, TBBPA efficiently produced reactive oxygen species (ROS) through CYP2B1 induction in rats. We measured 8-hydroxy-2’-deoxyguanosine (8-OHdG), a biomarker of DNA oxidative damage, in the kidney, liver and testes of rats following TBBPA treatment. As expected, TBBPA strongly induced the production of 8-OHdG in the testis and kidney. These observations suggest that TBBPA-induced target organ toxicity may be due to ROS produced by metabolism of TBBPA in Sprague-Dawley rats.