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목초(牧草)에 나타나는 면양위장(緬羊胃腸)내 선충류(線蟲類) 유충(幼蟲)의 시기(時期)적 변화(變化)
서국현,이정길,박영준,이차용,Suh, Guk-hyun,Lee, Chung-gil,Park, Young-jun,Lee, Chai-young 대한수의학회 1990 大韓獸醫學會誌 Vol.30 No.4
The seasonal availability and abundance of the free-living stages of sheep nematodes is a key factor in the occurrence and severity of parasitic infection, and studies of larvae ecology could result in more rational control measures. In the present study seasonal pasture contamination and availability of nematodes for grazing sheep was examined as a baseline work for nematode control program at Namwon Branch, National Animal Breeding Institute during the period April 1988 through March 1989. Standard meteorological measurements were available from Unbong Sub-station, Honam Crops Experiment Station located about 200m from the experimental site. A total of 5 kinds of nematode larvae was detected: Haemonchus contortus was most prevalent (38.0%) with a decreasing order of Ostertagia spp (35.1%), Trichostrongylus spp (19.8%), nematodirus spp (6.6%), and Oesophagostomum spp (0.5%). A succession of species was recorded, in particular Ostertagia spp in May; Haemonchus contortus in June and July; Trichostrongylus spp in July and August; Nematodirus spp in August and September. These results can be incorporated into the nematode control program. To make a more rational control program, however, repeated herbage larval counts should be undertaken soil larval counts and fecal larval counts in the future.
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.
젖소에서 $PGF_2{\alpha}$ 투여에 의한 발정 유도 후 수태율과 다른 인자와의 관계
박철호,임원호,서국현,오기석,손창호,Park, Chul-Ho,Lim, Won-Ho,Suh, Guk-Hyun,Oh, Ki-Seok,Son, Chang-Ho 한국수정란이식학회 2010 한국동물생명공학회지 Vol.25 No.3
The purpose of this study was to determine the relationship between conception rate and other parameters (body condition score; BCS, progesterone concentrations and follicle size) before estrus induction with $PGF_2{\alpha}$. The conception rate in cows with (2.75, 2.75 to 3.25 and 3.25), BCS regardless of AI (artificial insemination) time was 47.5, 67.5% and 48.5% at $PGF_2{\alpha}$ injection, respectively. The conception rate regardless of BCS was 59.0% in cows inseminated based on detected estrus, and 46.2% in cows inseminated at 72 to 80 hours (timed artificial insemination, TAI) after $PGF_2{\alpha}$ injection. The conception rate regardless of AI time was 43.0% in cows with low progesterone concentrations (less than 1.0 ng/ml), and 67.5% in cows with high progesterone concentrations (more than 1.0 ng/ml) at $PGF_2{\alpha}$ injection. The conception rate regardless of progesterone concentrations was 59.9% in cows inseminated based on detected estrus, and 48.1% in cows of TAI after $PGF_2{\alpha}$ injection. The conception rate regardless of AI time was 36.0% in cows with small dominant follicles (less than 5 mm), 56.0% in cows between 5 mm to 10 mm of follicle size, and 65.5% in cows with large dominant follicles (more than 10 mm) at $PGF_2{\alpha}$ injection, respectively. The conception rate regardless of follicle size was 57.3% in cows inseminated based on detected estrus, and 47.6% in cows of TAI after $PGF_2{\alpha}$ injection. These results indicated that if the cows with BCS 2.75 to 3.25, active corpus luteum, and/or large dominant follicle (more than 10 mm) are used for estrus induction, the conception rate will be greater.
한우(韓牛)에서 혈장(血漿) progesterone 농도측정(濃度測定)에 의한 춘기발동기(春機發動機)의 확인(確認)
강병규,최한선,손창호,서국현,Kang, Byong-kyu,Choi, Han-sun,Son, Chang-ho,Suh, Guk-hyun 대한수의학회 1993 大韓獸醫學會誌 Vol.33 No.3
Studies were conducted in 13 Korean native heifers to determine the puberty based on plasma progesterone profiles and estrus observations. Blood samples for determination of progesterone profiles were collected from jugular vein twice a week from 8 to 24 months of age, and all heifers werce observed for estrous behaviours twice a day. Heifers attained puberty at 11.3 months of age and 188.5kg body weight as determined by progesterone profiles, whereas the first estrous behaviours were observed at 14.2 months of age and 215.4kg body weight. This result indicates that determination of plasma progesterone profiles could be utilized for monitoring the puberty in Korean native heifers, and one or more ovulations occurred before pubertal heifers showed overt estrous behaviours.
한우(韓牛)의 번식효율(繁殖效率) 증진(增進)에 관한 연구(硏究) -Progesterone농도(濃度) 측정(測定)에 의한 조기임신진단(早期姙娠診斷)-
강병규,최한선,이정길,손창호,서국현,Kang, Byong-kyu,Choi, Han-sun,Lee, Chung-gill,Chang-ho, Son,Suh, Guk-hyun 대한수의학회 1990 大韓獸醫學會誌 Vol.30 No.2
Plasma progesterone concentrations were measured in 24 Korean native cows by a radioimmunoassay at 0, 6 and 20 days after insemination. As a result, 23 cows (95.8%) were judged to be in estrus with ovulation and one cow (4.2%) was judged to be in estrus without ovulation. Plasma progesterone concentrations at 20 days after insemination were $5.11{\pm}1.33$ (mean${\pm}$SD, range 3.20~7.86) ng/ml in pregnant cows and $0.35{\pm}0.10$ (range 0.30~0.50) ng/ml in nonpregnant cows. Of the 20 cows, 18 cows were confirmed the pregnant by rectal palpation at 60 days after insemination. The accuracy of the pregnancy diagnosis based on plasma progesterone concentration was 90 % for positive case and 100% for negative case.
김세영 ( Se Young Kim ),서국현 ( Guk Hyun Suh ),윤가현 ( Ga Hyun Youn ) 한국예방수의학회(구 한국수의공중보건학회) 2011 예방수의학회지 Vol.35 No.3
This study was to determine some appropriate models which account for attitudes toward practice of consuming dog (ACD) as a food and as a companion animal. Two models, one for males and the other females, were found from 670 community-dwelling respondents of the Gwangju Metropolitan area who aged 17~66 years. Age, keeping dog or willing to keep dog, and frequency of consuming dog as a food (FD) were exogenous variables in the models while attitudes toward companion animal were a mediating variable. The two models were slightly different, but the most influential variable accounting for the ACD was the FD. The findings of this study on the ACD were discussed in two dimensions of affect and utility which were motivational attitudes to animal. People who are against consuming dog meat as food would think of all dogs as only affectionate objects, and their points of view were discussed in the context of both keeping dog and restricting dog meat consumption. On the other hand, people who are for consuming dog meat would think of dogs as either affectionate or utilized objects, and their points of view were discussed in the context of halving dogs into companion dog and edible dog.
고능력 젖소 축군의 집단번식관리프로그램 적용에 의한 번식효율의 개선
노경수,김의형,남현욱,서국현,강현구,김일화,Rho, Kyung-Soo,Kim, Ui-Hyung,Nam, Hyun-Wook,Suh, Guk-Hyun,Kang, Hyun-Gu,Kim, Ill-Hwa 대한수의학회 2004 大韓獸醫學會誌 Vol.44 No.2
We investigated the effect of reproductive herd health program (RHHP) on the reproductive performance in high yielding dairy herds. Data collected from 205 lactations at Boeun County, Chungbuk from April 2001 to Dec. 2003 included postpartum reproductive and metabolic diseases, body condition score (BCS), reproductive performance and milking records. First we compared the reproductive performance of cows without RHHP (pre-RHHP group) and cows with RHHP (RHHP group). Intervals from calving to first service (99.6 vs. 81.8 days) and to conception (160.3 vs. 131.8 days) were shorter in the RHHP group than in the pre-RHHP group. Secondly, we determined the effect of milk yield (305 days) on the occurrence of postpartum diseases, BCS changes, and reproductive performance in cows under RHHP. The occurrence of metritis and metabolic diseases were greater in the over-10,000 kg group than in the under-10,000 kg group. The over-10,000 kg group lost more body condition than the under-10,000 kg group from calving to month 3 postpartum. Nevertheless, reproductive performance did not differ between the two groups. These results indicate that reproductive performance can be improved by the application of RHHP in high yielding dairy herds and that reproductive performance in the cows under RHHP are not affected by high milk yielding.
최한선,강병규,손창호,서국현,Choi, Han-sun,Kang, Byong-kyu,Son, Chang-ho,Suh, Guk-hyun 대한수의학회 1990 大韓獸醫學會誌 Vol.30 No.4
Plasma progesterone concentrations in 44 suckling Korean native cows were determined to monitor ovarian activity postpartum by radioimmunoassay. Blood samples were collected in 3 day intervals from 15 to 80 days postpartum. The ovaries and uterus were examined in 6 day intervals by rectal palpation. Results are summaried as follows: 1. The cows were qualified into four categories; Type I(normal): cyclic changes in plasma progesterone concentrations appear within 45 days postpartum(35 cows, 79.5%), Type II(cycle delayed): delayed resumption of ovarian activity by 55 days postpartum(5 cows, 11. 4%), Type III(cycle ceased with low progesterone): plasma progesterone concentrations remained low(${\leq}1ng/ml$) until 80 days postpartum(3 cows, 6.8%), Type IV(cycle ceased with high progesterone): plasma progesterone concentrations after 30 days remained high(${\geq}4.0ng/ml$) until 80 days postpartum(1 cow, 2.3%). 2. Out of the cows classified Type II and III, 7 cows had inactive ovaries and a cow had follicular cyst by rectal palpation. The cow of Type IV was diagnosed as bearing persistent corpus luteum by rectal palpation. 3. About 82% of the cows showed significant rises in plasma progesterone concentrations prior to 50 days postpartum and the cows of Type II and III resumed cycles in 31. 6(range 17~55) days after calving. However, 43.2% resumed cycles in 50 days postpartum by estrus signs. These results indicated that plasma progesterone concentrations assessed by radioimmunoassay can be utilized for monitoring postpartum ovarian activity and would be helpful for the early detection of ovarian dysfunction in the Korean native cow.
한우(韓牛)의 번식효율(繁殖效率) 증진(增進)에 관한 연구(硏究) -발정주기(發情周期) 및 임신초기(姙娠初期)의 progesterone 농도변화(濃度變化)-
강병규,최한선,이정길,손창호,서국현,Kang, Byong-kyu,Choi, Han-sun,Lee, Chung-gill,Son, Chang-ho,Suh, Guk-hyun 대한수의학회 1990 大韓獸醫學會誌 Vol.30 No.2
A study was conducted to improve the reproductive performance of Korean native cows. Plasma progesterone concentrations were determined by radioimmunoassay during the estrous cycle and early pregnancy. Plasma progesterone concentrations during the estrous cycle in the 15 cows were the lowest (0.30ng/ml) at estrus, gradually increased after 6 days, remained high from 8 to 17 days (3.87~5.59ng/ml) and drastically decreased thereafter to reach minimal concentrations at the next estrus. Plasma progesterone concentrations of the 10 pregnant cows at 20 days after insemination were $5.82{\pm}1.33ng/ml$ (mean${\pm}$SD) and those of 10 non-pregnant cows were $0.30{\pm}0.21ng/ml$, respectively. Therefore, plasma progesterone concentrations in the pregnant cows at 20 days after insemination were significantly higher than in non-pregnant cows (p<0.001).
한우와 젖소 신생 송아지의 말초혈액 림프구아군 특성비교
정영훈,허태영,강석진,기광석,박성재,이명식,서국현,Jung, Young-Hun,Hur, Tai-Young,Kang, Seog-Jin,Ki, Kwang-Seok,Park, Sung-Jae,Lee, Myeung-Sik,Suh, Guk-hyun 대한수의학회 2010 大韓獸醫學會誌 Vol.50 No.3
The present study was undertaken to establish reference values for the composition blood lymphocyte populations and compare forty three Hanwoo neonatal calves (KC) with twenty one Holstein calves (HC) by blood cell count and immunophynotying. The percentages of CD2+, CD4+, CD8+, CD26+, ACT2+, MHC class, MHC class II and WC1+ T cells, B cells were determined by flow cytometry. The number of lymphocyte and monocyte in HC were higher than those of KC. However, the number of neutrophils was higher in HC than KC. The proportions of CD2+, CD4+, CD8+, MHC class, and WC1+ lymphocytes remained relatively stable during the study period, while there was a moderate increase in the relative percentage of CD26+, ACT2+, MHC class II and B cell from birth to approximately 3 weeks of age. Marked differences in the relative proportions of the lymphocyte subpopulations were noted between the individual calves. The present study shows that the T-cell subpopulations are present in peripheral blood of KC at levels comparable with HC, while the MHC class II and B cell population of KC increases significantly with age. The absolute number of WBC in KC was due to the decrease of absolute number of neutrophil rather than the increase of lymphocyte. The results indicated that KC have significantly higher number of neutrophils, and proportion of MHC class II and B cell than HC.