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Rhipicephalus sanguineus (Latreille 1806); a new record of male tick identified with scanning electron microscopy in Korea R.
1984
Kang, Y.B. (Office of Rural Development, Anyang (Korea R.). Inst. of Veterinary Research)
The specimens were examined at the Institute of Veterinary Research in Anyang, Korea R. and were identified as Rhipicephilus sanguineus (Latreille 1806). The morphological characteristics observed by means of the scanning electron microscope were presented with some SEM microphotographs. As R. sanguineus was firstly discovered to occur in Korea R, a total of 20 species of ticks belonging to 8 genera such as Argas, Amblyomma, Boophilus, Dermacentor, Haemaphysalis, Hyalomma, Ixodes and Rhipicephalus has now been recorded
显示更多 [+] 显示较少 [-]Studies on antimicrobial agent produced by Lactobacillus acidophilus
1984
Kim, D.S. (Kyongbuk National Univ., Taegu (Korea R.). Dept. of Dairy Science)
The research was conducted to confirm the agent responsible for the antimicrobial activity contained in the fermented tomato juice with Lactobacillus acidophilus to extract and purify the antimicrobial agent to find the biological, physical and chemical properties of the agent. The agent responsible for the inhibitory activity was confirmed by both well assay method using fermented tomato juice with L. acidophilus and turbidimetric technique using the cell-free filtrate or neutralized filtrate of tomato acidophilus culture and found exerted antimicrobial agent other than lactic acid
显示更多 [+] 显示较少 [-]Effects of over-dosed lead and its interaction with iron, copper, zinc or protein supplement in chicks
1984
Park, J.H. | Kim, C.S. (Korea Advanced Institute of Science and Technology, Seoul (Korea R.))
The protective effects of high levels of dietary iron, copper, zinc or protein on lead toxicity were studied in chicks. Growth retardation, reduction of feed intake, anemia and accumulation of lead in the bone and kidney were observed in chicks fed a diet containing 500mg lead as chloride/kg of feed for 42 days. Early changes due to ingested lead were inhibition of red blood cell 8-aminolevulinic acid dehydrase at all doses and no effect of iron, copper, zinc or protein addition were observed
显示更多 [+] 显示较少 [-]Studies on the diagnosis of subclinical mastitis in cows by the measurement of the electrical conductivity, 1; comparison of various methods of handling conductivity data with the use of California mastitis test and direct somatic cell count
1984
Kang, B.K. (Chonnam National Univ., Kwangju (Korea R.). Coll. of Agriculture. Dept. of Veterinary Medicine)
A total of 466 foremilk from dairy farms in Chonnam Korea [R.] district was examined for the subclinical mastitis over a period of 1 year, using a method of the electrical conductivities (EC); absolute conductivity (AC) and differential conductivity (DC) and quarter difference value (QD), in relation to the California mastitis test (CMT) and the direst somatic cell count (DSCC). The compatibility and efficiency rating between the EC values and the other screening tests was conducted
显示更多 [+] 显示较少 [-]An ultrastructural study on two cases of canine leiomyosarcoma
1984
Lee, Y.S. | Lim, C.H. (Seoul National Univ., Suwon (Korea R.). Coll of Veterinary Medicine)
An ultrastructural study was to investigate on 2 cases of canine leiomyosarcoma. The nuclei of most tumor cells showed bilobate appearance. Most cells of the tumors had no distinct basement membrane. Most cells of the tumors had a degenerative rough endoplasmic reticulum. Intercellular matrix contained some amounts of collagen. Attachment areas between tumor cells were not apparent, but a few tight junction were clearly seen. Myofibrils were present in bipolar end area
显示更多 [+] 显示较少 [-]Morphological changes of the epididymal region of meat type cockerels
1984
Han, B.K. (Chonnam National Univ., Kwangju (Korea R.). Coll. of Agriculture. Dept. of Veterinary Medicine)
This study was to investigate the development pattern of epididymis in accordance with the growth of meat-type cockerels. Histological features of various ductules in epididymis of the cockerel on the age of weeks were within 10 weeks after hatching rete testis and connecting ductules were well developed but efferent ductules were observed in immature form. During 10th to 20th week, the lining epithelium of various ductules in epididymis was in the developing stage near to the mature form
显示更多 [+] 显示较少 [-]Anatomical studies on patterns of branches of aortic arch in Korean native goat
1984
Lee, H.S. | Lee, J.S. (Seoul National Univ., Suwon (Korea R.). Coll. of Veterinary Medicine)
This macroscopic observation was performed to investigate the aortic arch and their branches of the Korean native goat. Ten Korean native goats with black hairs ranging in body weight from 15 to 20kg were used. The findings were based on the latex cast of the vessels made by injection of neoprene latex. The Truncus bicaroticus was continued from the Truncus brachiocephalicus after branching off the A. subclavia dextra in 8 out of 10 cases, but the As. carotidas communes sinistra and dextra were directly branched from the Truncus brachiocephalicus without forming the Truncus bicaroticus in the remaining 2 cases
显示更多 [+] 显示较少 [-]Studies on pregnancy of dairy cows based on hormone concentrations in blood serum and milk
1984
Kim, S.K. (Chungnam National Univ., Taejon (Korea R.). Dept. of Veterinary Medicine)
The study was to find out the changes of hormone levels in blood serum and milk of Holstein cows during the estrous cycle. The progesterone, estradio 1-17beta from the blood serum and milk samples were assayed by radioimmunoassay methods. During 20 to 25 days after artificial insemination, the accuracy of pregnancy diagnosis from the blood serum progesterone levels were 87.5% for non pregnant cows (2.Ong/ml) and 83.3% for pregnant cows (3.Ong/ml). The accuracy of pregnancy diagnosis from the milk progesterone levels were 75.0% for non-pregnant cows (2.4ng/ml), and 94.4% for pregnant cows (3.2ng/ml)
显示更多 [+] 显示较少 [-]Construction technique of miniature rumen for the absorption test in the ruminants
1984
Kim, K.J. (Chungnam National Univ., Taejon (Korea R.). Dept. of Veterinary Medicine)
Five Korean native goats were used to test the effectiveness of the 2 modified techniques (Method 1 and 2) of Pawlow's pouch method. Both methods turned out to be successful and simpler than the original Pawlow's pouch method. In both methods, the miniature rumens were formed on the junction of 2 veins; vena ruminalis sinistra and vena ruminalis dextra. Both method 1 and 2 have the advantage of shortening the operation time, but caution was necessary to prevent the fistual formation between the rumen and miniature rumen in Method 1.
显示更多 [+] 显示较少 [-]Studies on selective separation of highly motile bovine sperm
1984
Kim, M.C. (Yonsei Univ., Seoul (Korea R.). Inst. of Agricultural Development)
As a fundamental study to increase the reproductive efficiency in cattle, highly motile sperm were separated and collected from raw semen, extended semen and frozen semen by different methods using various concentrations of bovine serum albumin or Tyrode's solution. Various characteristics and light microscopic and electron microscopic morphology of sperm separated by different methods were compared
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