DNA 분석법에 의한 한우고기 판별

오홍록,이창수,상병찬,송광택 충남대학교 농업과학연구소 2006 농업과학연구 Vol.33 No.1

This study was deal with the development of breed-specific DNA marker which is able to identify Hanwoo and European cattle breeds(Non-Hanwoo) meat. Genetic differentiation between Korean cattle(Hanwoo) and European cattle breeds was examined by Random Amplified Polymorphic DNA(RAPD) analysis. The RAPD patterns were identical among Non-Hanwoo, such as Holstein, Hereford. Aberdeen Angus. Brown Swiss. Limousin or Simmental. but the above pattern was different from that of Hanwoo. All bands detected in the Hanwoo samples were observed in Non-Hanwoo cattle samples, but one of the common bands found in samples was not detected in the Hanwoo samples. The band(1.4kb) may be useful as a marker for identifying a meat of Hanwoo from imported cattle meat. Actually, the detection of the DNA marker was tested by DNA analysis with 929 samples which were prepared from bloods of 673 Hanwoo cattles and 141 Holstein cattles, from 115 imported cattle meats. The DNA marker was absent in 644 of 673 Hanwoo cattles (96%) but present in 245 of 256 Non-Hanwoo cattles (95%). These results show that the DNA marker is effective to characterize Hanwoo and Non-Hanwoo meat by its detection. This DNA marker, however, was not useful in detecting unwanted crossbreeding between two cattle breeds, because the band pattern in hybrid cattle shows one of two band patterns in Hanwoo and Non-Hanwoo.

우리 나라 농장 사육 타조 알의 난질 조사

송광택,오홍록 충남대학교 농업과학연구소 2002 농업과학연구 Vol.29 No.1

The fresh eggs of African ostrich in Korea were used in this study to investigate their interior and exterior quality characteristics. In ostrich egg shape characteristics, long and short length were measured as 15.1∼16.1 ㎝ and 12.1∼13.6 ㎝, respectively. The egg shape index was calculated as 81.0 and the egg shell showed a more gloss white in color than that of hen egg. Calculated breaking strength of egg shell and egg shell surface based on the equation were 41.155 ㎏/㎤ and 804.7 ㎠, respectively. Average egg shell thickness including egg shell membrane was 1.89 ㎜ and there are no differences among parts of the shell. The egg shell membrane thickness was 0.10 ㎜ showing relatively thick in equator compared with that of blunt end. The average number of egg shell pores was counted as 19.7/㎠ showing relatively high number of egg shell pores at point end and the total number of egg shell pores in an egg was estimated as 15,241. The relative portion of each parts based on egg weight was estimated as 25.1% for egg york, 58.2% for egg white, 16.7% for egg shell and the ratio of egg yolk to egg white(Y/W) was 0.43. The average diameter and the average height of ostrich egg white were 19.7 ㎝ and 13.2 ㎜, respectively. Calculated the H.U (Haugh Unit) was -69.7 and the pH was 8.3. In ostrich egg yolk, the diameter, the height, the egg yolk index, and it's pH were calculated as 14.4 ㎝, 29.4 ㎜, 0.20, and 6.6, respectively. And the egg yolk color showed a more thin in yellow chroma compared with that of hen egg as due to it's thicker membrane.

韓國農村에 있어서의 蛔蟲感染相

李駿商,金光錄,高大警,成大林,李慈英,林漢鍾 한국농촌보건회 1980 농촌의학·지역보건 Vol.5 No.1

서혜부 탈장의 임상적 고찰

김광록(Kwang Rock Kim),박영행(Young Haeng Park),이용창(Yong Chang Lee) 대한외과학회 1980 Annals of Surgical Treatment and Research Vol.22 No.2

전력 전송거리 향상을 위한 무방향성 무선 전력 전송용 스피어리컬 자속 집중 송신부 설계 및 해석

박광록(Kwang-Rock Park),차화랑(Hwa-Rang Cha),김래영(Rae-Young Kim) 대한전기학회 2019 대한전기학회 학술대회 논문집 Vol.2019 No.10

Simulation based design of Eddy current sensor for inspection of bolts in oil filters

Kwang-Hee Im,Seul-Gi Lee,Hak-Joon Kim,Sung-Jin Song,Seung-Woo Ra,Yong-Deuck Woo,In-Rock Kim 한국생산제조학회 2014 한국생산제조시스템학회 학술발표대회 논문집 Vol.2014 No.9(2)

한국 증권시장의 주가 급등락과 주가 반등

지광훈(Kwang-Hoon Ji),정종락(Jong-Rock Chung) 연세대학교 경영연구소 2007 연세경영연구 Vol.44 No.2

본 연구는 주가 급등락의 충격 이후 나타나는 주가의 이상반응 현상을 한국의 주식시장을 대상으로 실증적으로 검증하였다. 1998년부터 2004년까지의 한국 증권선묻거래소 상장 주식의 일별수익률 자료를 이용하여 주가 급등락 이후의 전제표본, 상승추세 표본, 그리고 하락추세 표본의 주가 반응을 조사했다. 일별 10% 이상의 급등락 충격 이후 3일간의 누적초과수익률의 반응에 기초한 실증 분석의 결과는 다음과 같다. 첫째, 한국 주식시장에는 주가 급등의 충격 직후에는 양(+)의 초과수익을 발생시켜 모멘텀현상을 보이는 것으로 나타났다. 그러나 급등과 달리 급락 충격 직후에는 통계적으로 유의한 초과수익이 발생하지 않아 이상반응을 보이지 않는 것으로 나타났다. 둘째 투자자의 사전적 인식이 주가 급 등락과 함께 고려되는 경우에 상승 추세에서의 주가 급등 경우와 하락 추세의 주가 급등 경우에는양(+)의 초과수익을 발생시키고 있으나 그 이외의 경우는 이상 반응이 나타나지 않았다. 이는 급락의 경우에도 양(+)의 초과수익이 발생하여 반전현상을 보인 미국주식시장을 대상으로 조사한 선행 연구와 다른 결과이다. 셋째, 주가 급등락의 크기와 이후 이상 반응의 정도와의 관계는 예상대로 대제로 정(+)의 상관 관계가 있는 것으로 나타났다. The analysis is mainly focused on the price behaviors of Korean stock market following large one day price shock. These responses are differently related to the direction of the price shock and to pre-shock stock return drifts and firm fundamental characteristics. We analyze the relationship based on the Behavioral Finance hypotheses. Using daily returns for 141 companies from the KOSPI 200 index from March 1998 to December 2004, we use event study methodology to test the relationship between pre-shock variables, stock return drifts and firm fundamental characteristics, and post-shock cumulative abnormal returns. The large one day price shock defined as a change of at least 10%. The empirical results of this study are as the followings. First, the positive price shock shows positive cumulative abnormal returns in the Korean Stock Market, implying that there is the momentum. But there is not an distinct response following the negative price shock. Second, considering the direction of the price shock and pre-shock variables together, there are positive cumulative abnormal returns following the positive price shock from uptrend or downtrend. This empirical result is different from the results in the United States stock market. Third, the magnitude of the price shock is positively related to the post response.

유암의 임상적 고찰 및 원격 성적

서광림,강구정,양동휘,박용기,최창록 성분도병원 1992 성분도병원논문집 Vol.3 No.-

特殊 家禽類(烏骨鷄, 꿩, 청둥오리)의 屠體分析

宋光澤,吳洪祿 충남대학교 농업과학연구소 1994 농업과학연구 Vol.21 No.1

This study was carried out to investigate meat production ability of special poultry(Ogol fowl, pheasant and mallard). The results obtained Were summarized as follows; 1. On the average live weight in male and female of Ogol fowl and mallard were 1,304.0∼1,311.8g. 1,013.0∼1,138.8g, respectively. The live weight of pheasant was lighter than that of Ogol fowl and mallard. The ratio of carcass to live weight in pheasant, Ogol fowl and mallard were 70.9∼72.2%, 66.9∼68.2% and 65.4∼65.9%, respectively. 2. On the edible giblets ratio to live weight. the that of mallard was the highest(6.3%). while the that of Ogol fowl was the lowest(4.7∼4.8%) in each individual poultry. 3. On the cut-up parts ratio to carcass weight. the neck(6.7∼8.3%) and back (16,1∼18.0%) ratio of pheasant were lower than that of Ogol fowl and mallard. but the neck(l1.1∼13.3%), wings(14.6∼16.2%) and back(23.6∼25.2%) ratio of mallard were higher than the others. 4. On the ratio of meat to breast and legs parts, the yield of breast meat was higher than that of legs meat of all poultries. In mallard, the skin ratio on both parts(17.6∼22.9%) was higher than the others, while the bone ratio of pheasant and Ogol fowl(15.6∼20.6) was higher than that of mallard.

대퇴골두 무혈성괴사에서 시행한 핵심감압술 및 압박 골이식술

정광환 ( Kwang Hwan Jung ),장재석 ( Jae Suk Jang ),최영락 ( Young Rock Choi ) 대한고관절학회 2005 Hip and Pelvis Vol.17 No.4

목적: 대퇴골두 무혈성 괴사에서 핵심 감압술 및 압박 골이식술의 결과를 괴사부위의 크기와 위치에 따라 알아보고자 하였다. 대상 및 방법: 1996년 1월부터 2002년 9월까지 대퇴골두 무혈성괴사로 진단받고 핵심 감압술과 압박골이식술을 시행한 후 최소 2년이상 추시 가능했던 64명, 95예의 고관절을 대상으로 하였다. 남녀수는 각각 46명(71예), 18명(24예)였고, 나이는 평균 36.6(16~53)세였으며, 추시기간은 평균 43.3(24~95)개월이었다. 술 전 자기공명영상 소견상 괴사의 크기, 위치에 따른 수술 결과의 차이를 x2 -test와 Fisher`s exact test를 이용하여 비교 분석하였다(p<0.05). 결과: 임상적 진행은 21예(22.1%)에서 발생하였으며, 그 중 괴사의 크기가 50%이상인 경우가 17예(80.9%)였고, 모든 예에서 외측에 위치하였다. 방사선학적 진행은 51예(53.7%)에서 발생하였으며, 그 중 괴사의 크기가 50%이상인 경우가 28예(54.9%), 외측에 위치한 경우가 50예(98.0%)였다. 임상적 실패는 16예(16.8%)에서 발생하였으며, 그 중 괴사의 크기가 50%이상인 경우가 13예(81.3%)였고, 모든 예에서 외측에 위치하였다. 결론: 1. 괴사 부위의 크기는 클수록, 괴사 위치가 외측에 위치할수록 술 후 결과가 좋지 않았다. 2. 방사선학적 진행은 전체의 53.7%에서 발생하였으나, 인공 고관절 전치환술로 전환된 것은 16.8%에서만 발생한 것은 압박 골이식술(impaction bone graft)에 의해 대퇴골두가 강해진 것으로 생각한다. 3. 보다 더 긴 추시관찰이 필요하리라 생각한다. Purpose: To analyse the results of a core decompression and impaction bone graft according to necrosis size and location. Materials and Methods: Between Jan. 1996 and Sep. 2002, 64 patients (95 hips) who were followed up for a minimum of 2 years were studied. Forty-six (71 hips) were male and 18 (24 hips) were female. The mean age was 36.6 (16-53) years and the average follow up was 43.3(24~95) months. The surgical results were analysed using x2-test and Fisher`s exact test according to necrosis size and location. Results: Clinical progression was seen in 21 cases (22.1%), of which 17 cases had a lesion more than 50%. All 21 cases were located laterally. Radiologic progression was seen in 51 cases (53.7%), of which 28 cases had a lesion size involving more than 50%, and 50 cases were located laterally. Clinical failure was seen in 16 cases (16.8%), of which 13 cases had a lesion size involving more than 50%, and all 16 cases were located laterally. Conclusion: 1. The surgical results were worse when the lesion was larger and laterally positioned. 2. Radiologic progression was seen in 53.7% of cases, but conversion to total hip arthroplasty was seen in 16.8%, which was due to increased strength of femoral head. 3. To confirm these study results, longer follow up study is needed.