한우 포유모우의 산유량및 유조성분에 관한 연구 1 . 포유모우의 산유량 추정방법 확립에 관한 연구

강수원(S . W . Kang),정연후(Y . H . Chung),정창화(C . H . Chung),나승환(S . H . Na),손용석(Y . S . Son),백동훈(D . H . Baik) 한국축산학회 1989 한국축산학회지 Vol.31 No.3

This experiment was conducted to establish the estimating of dam`s milk producing capacity which forms the basis of Korean Native Cattle improvement for 3 years from 1982 to 1984. Four methods, including weight difference of the calf before and after nursing, hand milking and machine milking were compared with a new milking while the calf nurses, which the good points from the existing methods were extracted and then were developed. Fifty nine heads of nursing cow were tested to investigate dam`s milk yield. dam`s milk composition by the new milking method for 3 years from 1985 to 1987. The results of this experiment are summarized as follows: 1. This new method was made to use a portable vacuum·operated bucket milker in two quarters of each cow`s left or right udder while the calf suckles two quarters of his or her dam`s right or left udder. On this method. cows and calves were seperated at 8:00 am and at 5:00 pm the calves allowed to nurse. Cows and calves remained seperated over night. At 8:00 am and 5:00 pm the following day, the calves allowed to nurse one udder half while the rest was milked by machine. 2. On the comparison with methods estimating dam`s milk yield, the method by calf-weight difference before and after nursing wasn`t exact and good method in estimating dam`s milk yield and composition because not only this method was indirectly estimated by calf`s weight gain but also milk sample could not be taken. And also, the method by hand milking and machine milking could be surveyed only 60 days and 4 to 10 days, respectively, because dam`s milk yield was rapidly decreased with passing the milking day. However, by the new method, milking could be completely done without failure for 180 days and samples for analyzing the milk composition could be taken more easily and exactly than any other method. 3. Daily average and total milk yield of fifty nine heads investigated by this new method for 180 days was 3.48 and 625.8kg, respectively. 4. In the milk composition, total solids, far, protein, lactose and ash content was 14.21, 4.64, 4.07, 4.21 and 0.89 percent, respectively.

선택적 촉매 산화 반응에 의한 황화 수소의 제거 Ⅱ . TiO2 / SiO2 촉매 상에서 황화 수소의 선택적 산화 반응

천승우,박대원,우희철,홍성수,정종식 ( S . W . Chun,D . W . Park,H . C . Woo,S . S . Hong,J . S . Chung ) 한국공업화학회 1996 공업화학 Vol.7 No.4

본 연구는 H₂S를 TiO₂/SiO₂촉매상에서 산소와의 직접 산화 반응을 통해 원소 황의 형태로 제거하는 반응에 관한 것이다. 순수한 TiS₂Ti(SO₄)_2를 사용한 반응 실험과 순수한 TiO₂에 대한 주기적 온도 조작 실험 결과로부터 TiO₂는 황 회수 공정에서 사용되는 촉매의 비활성화의 주원인으로 알려진 sulfation이나 salfidation에 대해 매우 안정한 것으로 나타났다. TiO₂/SiO₂촉매에서 TiO₂의 담지량이 증가함에 따라 H₂S 전화율이 증가하였고, 원소 황의 선택도는 아주 소폭으로 감소하였다. 반응 실험결과 O₂/H₂S의 비가 증가할수록 원소 황의 선택도는 크게 감소하였다. 10 wt.% TiO₂/SiO₂ 촉매는 화학 양론비의 조성(H₂S=5 vol.% O₂=2.5 vol.%)의 반응물에 10 vol.%의 수증기를 첨가한 경우 활성과 선택도가 감소하였으나 여전히 80% 이상의 원소 황 수율을 유지하고 있었다. Selective catalytic oxidation of H₂S to elemental sulfur using TiO₂/SiO₂ catalysts was investigated in this study. The reaction test with pure TiS₂and Ti(SO₄)₂and cyclic temperature operation revealed that TiO₂had a good resistance to sulfation and sulfidation, which are known as the main cause of catalytic deactivation in sulfur recovery process. With the increase of TiO₂loading amount in Tio₂/SiO₂catalysts, the conversion of H₂S increased and the selectivity of elemental sulfur was very slightly decreased. As the ratio of O₂/H₂S increased, the selectivity to elemental sulfur was drastically decreased. In the presence of 10 vol.% water vapor to a stoichiometric mixture of H₂S and O₂(H₂S =5 vol.% O=2.5 vol.%), both activity and selectivity of 10 wt.% TiO₂/SiO₂catalyst are decreased, but it still showed more than 80% of sulfur yield.

1987년 한국에서 발생한 렙토스피라병의 혈청역학적 조사

이증훈,박영수,이우곤,김석용,정선식,우준희,박성광,박경희,송영욱,김선영,기정일,최두혁,강성귀,김주완,최강원,김우열,최명식,최인학,장우현,윤성열 대한감염학회 1988 감염 Vol.20 No.3

Human leptospirosis was an unfamiliar disease in Korea until 1984 that outbreak of leptospirosis occurred among farmers and soldiers after field works for harvesting rice. During that time, Lee and Jo confirmed the first Korean cases of leptospirosis by serological test, isolation of causative agent and autopy findings. Afterward several outbreaks occurred also during autumn especially after flood in every years and some characterisitcs of leptospirosis in Korea such as clinical manifestations, serotypes and seroepidemiological features has been revealed by many investigators. Because of the major mode of transmission between rodents and human is by direct contact with leptospiral urine of rodents or contaminated soil by the urine, leptospirosis in Korea has been primarily a disease of person in occupations heavily exposed to contaminated soil or infected urine such as farmer, army and etc. Therefore it seems that leptospirosis is one of the main communicable diseases to be controlled urgently in Korea, for an agricultural people account for almost half of total Korean people. For clarifying the seroepidemiological patterns of human leptospirosis in Korea by sex, month region and main reacting serovars of L. interrogans among acute febrile disease occurred in 1987, 1,773 patient's sers with acute febrile episodes were tested by microagglutination test using 19 representative strains of leptospiral serogroup as antigen. All of those sera were collected from 10 collaborative clinics located in Kyunggi, Kangwon, Chungbuk, Chungnam, Chonbuk, Chonnam province and Seoul. The results wee summerized as follows. 1) Among 1,773 sera of patients with acute febrile episodes, 219 (12.4%) were seropositive to L. interrogans, 487(27.5%) to R. tsutsugamushi, 241(13.6%) to R.typhi and 160(90.0%) to Hantaan virus. 2) Among seropositives to L.interrogans, the male outnumbered the female, 65% and 35%. 3) For age distribution, 26.9% of seropositives to L.interrogans were fifties, 19.6% were forties, 9.1% were sixties, 5.9% were thirties and 4.1% were twenties. 4) Eighty three percent of seropositives had occurred between September and October in 1987 with a peak in September. 5) Main leptospiral serovars reactive to patient's sera were Icterohaemorrhagiae(54.3%), Canicola(31.0%), CH-48(13.2%), Tarassovi(0.9%)and Cynopteri(0.5%). 6) For regional distribution, 65.8% of seropositives to L.interrogans were residents from Chonbuk, 12.3% were Chonnam, 7.3% were Chungnam, 5.5% were Kyunggi and 1.4% were Kangwon.

위암에서 CD40의 발현 및 CD40이 위암세포의 아포토시스에 미치는 영향

김상우 ( S. W. Kim ),윤승규 ( S. K. Yoon ),이학성 ( H. S. Lee ),정우철 ( W. C. Chung ),조영석 ( Y. S. Cho ),이인석 ( I. S. Lee ),최명규 ( M. G. Choi ),정인식 ( I. S. Chung ),박두호 ( D. H. Park ) 대한소화기학회 2002 대한소화기학회 춘계학술대회 Vol.2002 No.-

<목적> CD40은 종양 괴사 인자 수용체족의 하나로서 B 세포의 생존, 증식 및 분화에 중요한 역할을 하는 것으로 알려져 있으며 여러 악성종양에서도 CD40의 발현이 확인되었다. 그러나 아직까지 위암 조직이나 위암 세포주에서 CD40이 발현되는지, CD40이 위암세포의 아포토시스에 어떠한 영향을 미치는지에 대한 연구는 없다. 본 연구의 목적은 위암 조직 및 위암 세포주에서 CD40이 발현되는지를 조사하고, CD40이 위암세포의 아포토시스에 미치는 영향

Meiotic Inhibition with Roscovitine and Recombinant Human FSH in Porcine Oocytes and Its Effects on Maturation and Embryo Development

Kim, S.W.,D.H. Kim,J.S. Seo,G.S. Im,B.C. Yang,H.S. Park,I.S. Hwang,J.K. Park,H.T. Chung,B.S. Yang 한국동물생명공학회(구 한국동물번식학회) 2005 Reproductive & Developmental Biology(Supplement) Vol.29 No.2s

난용종계의 난질의 유전력 및 유전상관에 관한 연구

상병찬,한성욱,오봉국,정선부 ( B . C . Sang,S . W . Han,B . K . Ohh,S . B . Chung ) 한국축산학회 1983 한국축산학회지 Vol.25 No.5

This study was conducted to improve the interior egg quality with a total of 6,093 eggs, laid at 351 Single Comb White Leghorns and 326 Rhode Island Reds, produced at National Livestock Breeding Station from March 1, 1979 through July 30, 1980. The results obtained are summarized as follows; 1. The average albumen height of the eggs at first eggs, 300 and 500 days of age was 8.32, 7.51 and 6.74㎜ in the S.C.W. Leghorn and 8.04, 6.94 and 6.05㎜ in the R.L.Red, and the Haugh units at first egg, 300 and S00 days of age was 90.92, 79.74 and 76.25 in the S.C.W. Leghorn, and 88.54, 80.02 and 74.56 in the R.I. Red, also the egg shell thickness at first egg, 300 and 500 days of age was 0.383, (1.364 and 0.334㎜ in the S.C.W. Leghorn and 0.354, 0.332 and 0.327 in the R.I. Red. 2. The heritability estimates in the S.C.W. Leghorn and R.I. Red were 0.398∼0.847 and 0.306∼0.634 for albumen height, 0.162∼0.594 and 0.125∼0.485 for Haugh units, 0.185-0.339 and 0.176∼0.402 for egg shell thickness, respectively. 3. The genetic correlation coefficients between the interior egg qualities were as follows. In the S.C.W. Leghorn and R.I. Red, the coefficients between albumen height and Haugh units, 0.432∼0.845 arid 0.397∼0.974; between albumen height and egg shell thickness, 0.046∼0.226 and 0.068∼0.197; between Haugh units and egg shell thickness, 0.089∼0.364 and 0.165∼0.327 ; respectively.

우리나라보호지역시스템에 대한관리효과성평가

허학영(Hag Young Heo),M. Hockings,신원우(W. W. Shin),정혁진(H. J. Chung),N. Dudley,P. Shadie,R. Vaisanen,G. Vincent,김현(H. Kim),박소영(S. Y. Park),양성우(S. W. Yang) 국립공원연구원 2010 국립공원연구지 Vol.1 No.3

생물다양성협약(CBD) 제7차 당사국총회에서 채택된 보호지역실행프로그램(PoWPA)은 당사국들에게 그들의 보호지역에 대한 관리효과성 평가 수행을 권고하고 있다. 이 연구의 목적은 생물다양성협약의 권고사항 이행과 더불어 한국 보호지역시스템에 대한 진단 및 관리 개선을 위한 권고사항을 도출하고자 하였다. 평가 대상지는 환경부에서 관할하고 있는 국립공원, 생태경관보전지역, 습지보호지역, 야생동식물특별보호지역 총 39개소(6,898 km2)를 대상으로 하였다. 평가는 2가지 차원에서 수행되었는데 39개 보호지역(한국 보호지역의 면적 대비 40%정도)에 대한 개별 평가와 한국보호지역시스템에 대한 평가가 이뤄졌으며, 시스템 평가는 국제전문가들과 함께 현장조사, 관리자 및 이해관계자인터뷰, 문헌검토 등을 통해 수행되었다. 평가 결과 개별 보호지역이 국제적으로 잘 관리되고 있었으며, 거버넌스와 행정부분이 다른 나라에 비해 상대적으로 강점으로 나타났고, 생물다양성보호와 자연자연관리에 대한 조화와 협력 부분이 상대적으로 미흡한 것으로 나타났다. 또한 비전과 계획 부분이 특히 강하며, 전반적인 국민의 높은 지지가 매우 인상적이지만, 다른 여러 나라들과 마찬가지로 지역사회협력 부분이 약한 것으로 나타났다. 보호지역의 관리를 개선하기 위한 10가지 주요 권고사항은 보전을 위한 지역적 접근 강화, 보호지역시스템계획 강화, 기관간 통합적 관리 개선, 지역사회와 협력 개선, 이해관계자와 협력 강화, 지방정부와의 협력 개선, 인력관리 재고, 재원 다양화, 연구과제 다양화, 자연자원과 문화자원의 관리 조화 개선 등이다. The Convention on Biological Diversity (CBD)’s Programme of Work on Protected Areas (PoWPA), which was adopted in CoP-7 in 2004, calls on countries to undertake assessments of the effectiveness of management of their protected areas (PA). The objectives of this study are to implement a recommendation of PoWPA, to review the current management status of PA system, and to find out some recommendations for the better management of protected areas in Korea. Assessment Sites are 39 protected areas (6,898 km2) managed under Ministry of Environment which are National parks, Ecosystem & landscape conservation areas, Wetland protected areas, and Wildlife special protected areas. The assessment was conducted at two levels: a site assessment of 39 protected areas, representing about 40% by area of the Korean PA system and a system-level assessment conducted by an international review team incorporating field visits, interviews with staff and stakeholders and review of relevant documentation. The assessment results generally show that individual protected areas are well managed on any international comparison. Governance and administration appears to be relatively stronger in Korea than in other countries, however harmonization and coordination of biodiversity protection and natural resource management remains relatively weaker. Korea also appears to be particularly strong in vision and planning. Korea’s trend toward increasingly high levels of overall public approval is globally impressive; however, as is the case in the rest of the world, community engagement at local levels remains weak and problematic. Ten key recommendations for improving management were to develop a more regional approach to conservation, strengthen PA system planning, better integrate management across agencies within Korea, improve local community relations, enhance interaction with stakeholders, improve integration with regional government, review staff management practices, diversify the funding base, broaden the focus of internal research work and better harmonize natural and cultural resource management.

A Study on the pH Characterization for Microbial Fermentation in Tomato Juice

S.M. Choi,D. Supeno,Okka A.,S.W. Chung,H.S.Kim,J.S. Kim,J.M. Park,S.H. Kwon,S.K. Kwon,W.S. Choi 한국산업융합학회 2014 한국산업융합학회 논문집 Vol.17 No.3

This study was conducted to know the behavior of pH behavior in the tomato juices to find out an effective medium for microbial cultivation. Bacterial culture media is a material consist a mixture of nutrients used to grow microorganisms on or in it. In addition, microbial culture media can also be used for isolation, propagation, testing the nature physiological, and calculation of the number of microorganisms. Fresh tomato juice is used for basic ingredient, therein added salt, sugar and EM (Effective Microbial). The fermented solution placed in a room with a temperature of 40℃. Data retrieval before the pH value reached a constant value is done every 12 hours, after constant rate data collection was done every 24 hours. The pH value has been steady after 372 hours of fermentation process (15.5 days). From the results obtained that the amount of additional ingredient which added into tomato juice does not affect final pH value of solution. Thereby the most effective treatment for microbial cultivation media is treatment number four.

선택적 촉매 산화 반응에 의한 황화수소의 제거 1 . 촉매의 개발

천승우,박대원,우희철,홍성수,정종식 ( S . W . Chun,D . W . Park,H . C . Woo,S . S . Hong,J . S . Chung ) 한국공업화학회 1995 공업화학 Vol.6 No.5

본 연구는 H₂S를 산소와의 직접 산화 반응을 통해 원소 황의 형태로 제거하는 반응에서 고농도의 H₂S를 처리할 수 있는 촉매의 개발에 관한 것이다. 최적의 촉매를 개발하기 위해 각 담체와 금속 산화물에 대한 반응성 실험을 실시하였다. 실험 결과 담체로는 Al₂O₃, TiO₂, ZrO₂ 등이 금속 산화물로서는 Fe₂O₃, V₂O_5, SnO₂, Cr₂O₃ 등이 좋은 활성을 보였다. 반응물 중의 산소의 분압 영향과 반응물에 포함되어질 수 있는 물의 영향에 대해서 관찰한 결과 산소의 분압이 높을수록 전화율은 증가하나 황 선택도는 급격히 감소하는 경향을 보였고, 10vol.%의 물을 반응물에 첨가한 경우 전화율과 황 선택도가 동시에 감소하는 경향을 보였다. In this study, development of catalysts far the direct oxidation of hydrogen sulfide to elemental sulfur, specially for the treatment of high concentrantion of H₂S, was investigated. To find out optimum catalysts, a screenig test for various supports and metal oxides was carried out. Among the supports tested, Al₂O₃, TiO₂ and ZrO₂ showed good catalytic activity. Fe₂O₃, V₂O_5, SnO₂ and Cr₂O₃ have been considered to be active metal oxides. The study on the effects of oxygen partial pressure revealed that the conversion of H₂S increased with increasing the ratio of O₂/H₂S, but the selectivity to sulfur was drasctically decreased. Bath of the conversion of H₂S and the selectivity to sulfur were decreased when 10 vol.% of water was added to the mixture of H₂S and oxygen.

편광 필터가 적용 된 적외선 이미지 딥러닝 기반 공구 마모 측정

최성운(S. U. Choi),김동욱(D. K. Kim),장웅기(W. K. Jang),서영호(Y. H. Seo),김병희(B. H. Kim) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.5월