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백영기,이한경,양홍현,김인식,Paik, Young-ki,Lee, Han-kyoung,Yang, Hong-hyun,Kim, In-shik 대한수의학회 1993 大韓獸醫學會誌 Vol.33 No.1
The morphogenesis of the stifle joint in Korean cattle embryos and fetuses was observed by radiography, alizarin red S stain and light microscopy. Fourty-eight(48) embryos and fetuses, ranging from 11mm to 160mm in crown-rump length (C-R L), were used for this study. The experimental samples were divided into twelve separate groups according to their C-R L. The first to the nineth group ranged from 11-100mm in C-R L, spaced at 10mm intervals. The tenth to the twelfth group ranged in C-R L from 101mm to 160mm, and were spaced at 20mm intervals. The results were as follows; 1. The first appearance of the interzone between the femur and tibia was formed in the second experimental group. The patellar ligament and cruciate ligament appeared in the third group and the patella, menisci and synovial cavity appeared in the fourth group. 2. The lateral and medial menisci were first obseved in the fourth group, and these structures showed crescent shape in the fifth group of the fetuses. 3. The first appearance of the femoro-tibial joint cavity was in the third group. The fifth group contained the first appearance of the patello-femoral cavity. Also, the femoro-tibial cavity was divided into two cavities by the anterior and posterior cruciate ligament.
백영기,양홍현,김인식,박영석,Paik, Young-ki,Yang, Hong-hyun,Kim, In-shik,Park, Young-seok 대한수의학회 1997 大韓獸醫學會誌 Vol.37 No.1
The morphology of the ductuli efferentes of the Korean native pheasants were observed in order to obtain a basic data for further studying reproductive physiology and other male genital organs. The mature (14-16 months after hatching) male pheasants were used in this study. The specimens from pheasants were collected on a monthly basis. The general morphological changes of the ductuli efferentes were observed with hematoxylineosin stain, and semithin section by light microscope. The ultrastructural changes of the ductuli efferentes were investigated with ultrathin section by transmission electron microscope. The results obtained are summarized as follows : 1. During the breeding season, the average height of ductuli efferentes epithelium was $23.45{\pm}2.34{\mu}m$ and was largely decreased by $17.85{\pm}2.01{\mu}m$ during the non-breeding season. The thickeness of interstitial tissue was comparatively increased during the non-breeding season. 2. During the breeding season, the epithelial cells of ductuli efferentes were well developed. During the non-breeding season, epithelial layer and lumen of ductuli efferentes, were markedley reduced compared with those of breeding season. 3. Morphological changes of the ductuli efferentes underwent periodic changes paralleling to the spermatogenic cycle. 4. At least two different cell types were identified in the epithelium of ductuli efferentes, namely non-ciliated and ciliated cells. 5. The ciliated cells possess many vesicles, slightly smaller than those of the non-ciliated cells. 6. The ciliated cells contained numerous mitochondria, smooth and rough endoplasmic reticulum, Golgi complex, lysosome, and oval nuclei. The non-ciliated cells had a irregular nuclei and a cytoplasm containing few organelles. 7. During the breeding season, a number of vesicles, rough and smooth endoplasmic reticulum, Golgi complex, and mitochondria were distinctively showed in the epithelial cells but in the non-breeding season only a few observed.
백영기,임병무,Paik, Young-ki,Rim, Byung-moo 대한수의학회 1989 大韓獸醫學會誌 Vol.29 No.4
In order to investigate the renal pathology of spontaneously occurring renal lesions, basic macroscopic inspection was conducted to 3,850 pigs randomly collected from local slaughter houses, and a total of 355 pigs (9.2%) were detected with various gross pathological conditions. Renal morphologic patterns for gross lesions were classified histopathologically as 123(34.5%) congestion, 81(22.8%) acute interstitial nephritis, 52(14.7%) chronic interstitial nephritis, 49(13.8%) hemorrhage, 39(11.0%) renal cyst, 29(8.2%) chronic glomerulonephritis, 18(5.1%) acute glomeruonephritis, 14(3.9%) infarction, 11(3.1%) thrombosis, 5(1.4%) atrophy, 5(1.4%) pyelonephritis and 1(0.3%) lymphosarcoma.
백영기,이주묵,김진구,Paik Young-Ki,Lee Joo-Muk,Kim Jin-Ku 대한수의사회 1980 대한수의사회지 Vol.16 No.11·12
To make a survey on present nutritioal level of dairy cattle (Holstein) which are fed in Jeonbug Province, The examination of their blood and chemical values were carried out. The results summarized were as follows: 1. WBC counts were $8.49{\pm}1.73(