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손동수,김용환,Son Dong-Soo,Kim Yong-Hwan 한국임상수의학회 1987 한국임상수의학회지 Vol.4 No.1
For the epidemiological studies of the respiratory infection from 1,918 heads of adult rabbits from January 1980 to December 1985 at an integrated farm, the causative agents were. Isolated samples 92 from of lungs and nasal discharges, and identified by serological and non-serololgical tests, the loss rates by the infection were also investigatyed, and the antimicrobial sensitivities of the isolates were determined. The results obtained were as fellows : 1. The loss rate by respiratory infection was 11.9% among 1,819 heads which raised and 41.7% among 518 heads which lost by diseases, and the rate increased annually. 2. The loss rate of rabbits in Spring (45.0%), Summer (45.5%) and Winter (53.5%) showed significantly higher (P < 0.01) than that in Autumn(29.1%). 3. The loss rate of Rex (56.3%) showed significantly higher (P<0.05) than New Zealand White (40.7%) and Californian (42.0% ). 4. P. multocida.(37.9%), B. brouchiseptica (16.0%), E. coli (10.6%) and so forth were isolated from 92 samples of lungs and nasal discharges. 5. Sixty fours trains of P. multocida were typed by serological or non-serological tests and their all serotypes were A type (62 strains) except 2 strains of untypable. 6. In antimicrobial sensitivity test for 64 isolates of P. multocida, all the strains tested were highly sensitive to chloramphenicol(95.3%), colistin (95.3%), gentamicin (92.2%), kanamycin (90.6%), neomycin (82.8%) and tetracycline (81.3%), but exhibited low sensitivity to streptomycin (26.6%), and all strains were resistant to lincomycin. 7 Twenty seven isolates of B. brouchiseptica showed higher sensitivity to cephalothin (100%), erythromycin (100% ), gentamicin (100%). trimethoprim+sulfamethoxazole (100%), chloramphenicol(88.9%), kanamycin(88.9%), neomycin (88.9%) and colistin (85.2%), but lower sensitivity to nitrofurantoin (18.5%), penicillin(18.5%). streptomycin(18.5%) and ampicillin (14.8%), and all strains were resistant to lincomycin.
젖소의 신성수정란의 동결수정란의 비외과적 이식에 관하여
김일화,손동수,이광원,장인호,Kim, Ill-hwa,Son, Dong-soo,Lee, Kwang-won,Chang, In-ho 대한수의학회 1992 大韓獸醫學會誌 Vol.32 No.1
Sixty Four fresh and 142 frozen embryos of dairy cattle were transferred to synchronized dairy, beef or Korean Native Cattle nonsurgically at National Animal Breeding Institute from 1985 to 1990. The results obtained were as follows ; 1. The pregnancy rate of fresh embryos(39.1%) was higher than that of frozen embryos(32.4%) and average pregnancy rate was 34.5%. 2. The pregnancy rate of grade 1 embryos was higher than that of grade 2 embryos for both fresh(41.3% vs 33.3%) and frozen embryos(35.4% vs 25.6%). 3. The pregnancy rate according to development stage of fresh embryos was increased with maturity as 29.2%, 33.3%, 50.0% and 54.5% for morula, early blastocyst, blastocyst and expanded blastocyst, respectively. For frozen embryos, the pregnancy rate of blastocyst(44.4%) was higher than those of morula(31.3%) and early blastocyst(28.0%). 4. The pregnancy rate according go recipient-donor synchrony for fresh embryos was higher when the recipients exhibited estrus 1 day earlier than the donors(43.8%) than when the recipients exhibited estrus 1 day later than the donors(38.1%) or when the recipients and donors exhibited estrus at the same time(37.0%). For forzen embryos, the pregnancy rate was decreased when the recipients and donors exhibited estrus at the same time(37.9%), when the recipients exhibited estrus 1 day later than the donors(32.0%) and when the recipients exhibited estrus 1 day earlier than the donors(23.5%), in sequence. 5. The pregnancy rate of heifers was higher than that of cows for both fresh(50.5% vs 37.9%) and frozen embryos(39.7% vs 25.7%). 6. The pregnancy rate according to recipient breed for fresh embryos was higher in dairy cattle(42.1%) and beef cattle(40.%) than in Korean Native Cattle(33.3%). For frozen embryos, the pregnancy rate was decreased beef cattle(39.1%), dairy cattle(30.3%) and Korean Native Cattle(14.3%), in sequence. 7. The pregnancy rate according to equilibrium steps of glycerol and freezing rate was higher when transferred after 3-steps equilibrium and freezing by the rate of $0.3^{\circ}C$/min from $-6^{\circ}C$ to $-35^{\circ}C$ and $0.1^{\circ}C$/min to $-38^{\circ}C$(39.4%) than when transferred after 6-steps equilibrium and freezing by the rate of $0.5^{\circ}C/min$ from $-6^{\circ}C$ to $-30^{\circ}C$(30.3%).
난포기 및 황체기에 있어서 돼지 난관협부 평활근의 자율적 운동성에 대한 Estradiol-l7$\beta$및 Progesterone의 영향
이민기,손동수,이영락,남정우,김주헌,최상용,Lee Min-Gi,Son Dong-Soo,Lee Yeong-Lak,Nam Jeong-Woo,Kim Joo-Heon,Choe Sang-Yong 한국임상수의학회 1991 한국임상수의학회지 Vol.8 No.2
The effects of estradiol-17$\beta$ and progesterone on the spontaneous motility of pig oviductal isthmic smooth muscle were investigated. The motility of the Isolated smooth muscle was recorded by using physiological recording system. The results were summarized as follows; 1. The amplitude and frequency of spontaneous motility in pig isthmic smooth muscle were 0.251$\pm$0.023 g and 15.380$\pm$0.935/min in follicular stage, and 0.201$\pm$0.027g and 14.520$\pm$1.382/min in luteal stage. 2. The spontaneous motility of pig isthmic smooth muscle was excited by estradiol-17$\beta$ but was not by progesterone in follicular and luteal stage.
과실이 크고 품질이 우수한 조생종 배 ‘금촌조생’ 육성
조광식(Kwang-Sik Cho1),손동수(Dong-Soo Son),강삼석(Sam-Seok Kang),김명수(Myung-Su Kim),홍경희(Kyung-Hui Hong),윤석규(Seok-Kyu Yun),조강희(Gang-Hui Cho),조현모(Hyeon-Mo Cho) 한국원예학회 2004 원예과학기술지 Vol.22 No.1
‘Geumchonjosaeng’ pear cultivar (Pyrus pyrifolia var. culta Nakai) originated from the cross between ‘Imamuraaki’ and ‘Danbae’ to improve the fruit quality of ‘Imamuraaki’ cultivar in 1971 at Naju Pear Research Institute of National Horticultural Research Institute (NHRI), Rural Development Administration (RDA). It was preliminarily selected in 1982 and named in 2001. The tree habit shows vigorous growth and upright spreading. It carries abundant pollen grains and shows cross compatibility with leading cultivars. Also it shows high resistance to black leaf spot (Alternaria kikuchiana) in the field condition. Optimum harvest time is around Sep. 3, which is 5 days later than that of ‘Wonwhang’, and it could satisfy consumer’s demand for high quality pear fruit in “Chuseok”. The obovate fruit shape resembles maternal parent, ‘Imamuraaki’ and skin color is green yellowish brown at normal harvesting time and gradually turned to yellowish brown at full ripennig state. Fruit weighs about 593 g, and the soluble solid content is 13.5 ˚Bx. The flesh is very soft and juicy and, rendering good eating quality. Shelf life is about 20 days under the ambient temperature, and it is a relatively long period as compare with other early season cultivars.
김종섭,정헌식,조규현,곽수동,손동수,이동원,Kim, Chong-sup,Chung, Heon-sik,Cho, Gyu-hyen,Kwak, Soo-doog,Son, Dong-soo,Lee, Dong-won 대한수의학회 1998 大韓獸醫學會誌 Vol.38 No.2
A 2-year-old male pseudohermaphrodite in Korean native cattle was observed macroscopically and microscopically. The results were summarized as follows. In the female reproductive organs, the vulva and vestibule were normal size, but the vagina and uterus were shorter and smaller abnormally. The uterine tube and ovary were absent, but the small testes was located in the abdominal cavity.
Holstein 송아지의 두얼굴증(Diprosopia) 1례
김종섭,조규현,이종환,곽수동,최민철,손동수,이동원,Kim, Chong-sup,Cho, Gyu-hyen,Lee, Joung-hwan,Kwak, Soo-dong,Choi, Min-cheol,Son, Dong-soo,Lee, Dong-won 대한수의학회 2000 大韓獸醫學會誌 Vol.40 No.1
A 20-day-old female Diprosopia in Holstein calf was observsd macroscopically and radiographically. Anterior head duplication(Diprosopia) was observed and all structures caudal to it were normal. She had two muzzles, three eyes, two ears and two tongues. The tongues were joined at their base just posterior and had one hyoid bone. Schistognathia and cleft lips were also observed in the lower jaws. She had an oral cavity, single epiglottis and a laryngeal cavity communicated with one trachea. The cerebral hemispheres were duplicated and fused together in the caudal region. The olfactory and optic nerves were duplicated. The incisive, nasal, pterygoid, parietal, ethmoid bones and vomer were duplicated, respectively. The skull of Diprosopia was shared by an occipital bone. The mandibules, palatines and sphenoid bones were duplicated incompletely. Three orbits and two fontanelles were observed. The medial lacrimal bones and maxillae were duplicated incompletely and fused with each other, respectively. Cleft palates were observed. Medial mandibular mass which was fused together and was duplicated incompletely at the part of its cranial, was shown synchondrosis with the left mandible, but not with the right.
신생 송아지에 있어서 Theileria sergenti 의 감염에 관한 연구
백병걸,임병무,이우종,김진호,김병수,손동수,이광원,Baek, Byeong-kirl,Rim, Byung-moo,Lee, Woo-jong,Kim, Jin-ho,Kim, Byeong-su,Son, Dong-soo,Lee, Kwang-won 대한수의학회 1993 大韓獸醫學會誌 Vol.33 No.4
The rate of 67 neonatal calves's infection of Theileria sergenti was investigated in random samples on the farms located in Kyeongki, Chonbuk and Jeju districts of Korea. The criteria used in verifying infection with T sergenti included the detection of parasites by giemsa's stain and acridine orange stain in the blood smear slides. Further evidence of current or previous exposure to T sergenti was based on the demonstration of T sergenti-specific antibody and antigen by the western immunoblot and the indirect immunofluorescence antibody test in the peripheral blood of the calves. The prevalence rates were 35%, 50% and 100% in Kyeongki, Chonbuk and Jeju provinces respectively and the overall prevalence in all the farms was 43.2% by means of acridine orange stain. The parasites that were observed in the peripheral blood of calves was shown surely by the western immunoblot to the characteristic 34KD antigen among the proteins of T sergenti (Korean Isolate). And the antibody of the neonatal calves reacted at the very highest titer(1 : >2,520). These data highlight the significance of T sergenti in the neonatal calf disease in Korea.
Bovine leukemia virus에 감염된 우리 나라 젖소의 말초혈액 내 림프구 수
서국현,이정길,이채용,허태영,이정치,강석진,손동수,안병석,김남철,Suh, Guk-hyun,Lee, Chung-gil,Lee, Chai-yong,Hur, Tai-young,Lee, Jeong-chi,Kang, Seog-jin,Son, Dong-soo,Ahn, Byeong-seog,Kim, Nam-chul 대한수의학회 2005 大韓獸醫學會誌 Vol.45 No.2
Hematologic investigations were made on the blood samples taken from bovine leukemia virus (BLV)-seropositive Holstein-Friesian cattle in Korea, and their absolute lymphocyte count was compared with that of BLV-seronegative cattle. The incidence of persistent lymphocytosis (PL) was also determined. The normal bovine lymphocyte count was established on the basis of studies of 656 blood samples taken three times from 297 seronegative animals aged from 0~6 months to over 5 years at 5~6-month intervals. The data were examined according to 7 age groups of samples placed into their respective age groups. A peak in average total count was reached at 6~12 months ($5.36{\times}10^3/{\mu}l$) and thereafter the count declined continuously until over 5 years ($3.17{\times}10^3/{\mu}l$). From the results, 99.74 percent limits were calculated, and the upper limit of the range was chosen as the cutoff point for lymphocytosis. A PL was defined as a lymphocyte count that exceeded the above 99.74 percent limits and persisted over an interval of at least three months. The criterion for PL was applied to classifying 515 blood samples obtained four times from 189 seropositive animals without clinical signs at 5~7-month intervals. It was found that 54 (28.5%) of seropositive animals were with PL; cattle with PL were in age groups of 2~3 years to over 5 years.