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김차용,변유성,문평일,정덕화,김종수 慶尙大學校 1987 論文集 Vol.26 No.1
Chinchilla 계통 1~1.5㎏ 되는 토끼 30마리를 5군 으로 나누어 체중㎏당 제 1군은 대조군으로서 Cornoil 0.3ml 씩 제 2군은 aflatoxin B? 0.03mg과 인삼 엑기스 8mg을 제 5군은 aflatoxin B? 0.06mg과 인삼엑기스 8mg을 3주동안 카테타로 경구 투여하여 임상, 혈액학적 및 병리학적 변화를 관찰하였다. 1.사료소비량 감소, 침울, 쇠약, 혼수, 체중증가율감소등과 같은 임상증상은 대조군을 제외한 전 처리군에서 독을 투여후 3일째 부터 전처리기간을 통하여 나타났으나 aflatoxin B? 단독처리군에서 인삼엑기스 혼합처리군보다 더 현저하게 나타났다. 2. 혈청 효소와 AST, ALT는 독물투여후 7일부터 인삼엑기스 혼합투여군 보다 aflatoxin B? 단독 투여군에서 높게 증가하였다. 3.전처리군에서 적혈수용적, 헤모글로빈농도는 영향을 받지 않았고, 혈장단백질은ㅇ 독물투여후 14일이후 aflatoxin B?단독 처리군에서 현저하게 감소하였다. 4. Aflatoxin B?과 인삼엑기스 혼합 투여군 보다 aflatoxin B? 단독투여군에서 간장의 공포변성,담관증생, 핵농축, 붕괴, hepatic fibrosis와 임파절 및 비장에서 현저한 임파양 세포의 소실을 나타내었다. The present study has been carried out to investigate the effectsof ginseng extract on induced chronic aflatoxicosis in rabits. Groups of rabbits were treated orally with aflatoxin B? and mixture of ginseng extract for 21 days with a dosage of 0.03mg, 0.06mg of the toxin and 0.03mg or o.o6mg of the toxin mixture of 8mg of ginseng extract or 0.3ml corn oil s place to per kg body weight. The results obtained were is follows. 1. Sings o toxicosis included reduction of feed consumption emaciation, decrese of body weight and coma revealed in both groups treated with 0.03mg pr 0.06,mg of aflatoxin B?/Kg/B.W than groups 4.5 after days 3. 2. In groups 2, 3(aflatoxin B? 0.03, 0.06mg), Activity of asparate aminotransferase(AST) and alanine aminotransferase (ALT)were increased sigificantly in dats7, 14 and 21. 3. In all groups, Mean values for packed cell volume(PCV)and hemogobin were unremarkasble, but plasma total protein were decreased in groups 2,3than 4,5 groups on days 14 and 21. 4. The rabits treated with aflatoxin B?(2,3 groups)showed markedly degenerative chasnges ranging from swelling and decreaseed granularity to marked vacuolation, hepatic necrosis, fibrosis and bile duct, Proliferation and depletion of lymphocytes in lymphocytes in lymphonde, spleen than groups 4,5.
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정원복,오주성,황필성,김수동,서세정,현종내,김대호 東亞大學校 2002 東亞論叢 Vol.39 No.-
맥주맥의 이면교잡에 의한 F_1세대에 대한 조합능력을 검정한 결과를 요약하면 다음과 같다. 8개 형질에 대한 GCA, SCA, RCA효과를 검정한 바 조합능력은 전 형질에서 GCA, SCA, RCA가 모두 유의하였는데 간장, 수장, 망장, 간직경, 곡핍폭, 1수립수 1000립중은 GCA가 SCA보다 크고, 품종간 GCA효과는 진양보리가 간장에서 부(-)이고, 삼도보리가 수장·망장·간직경·1000립중에서, 사천6호가 망장과 간직경에서, 진광보리가 곡립장에서, 두산29호가 곡립폭·1수립수·1000립중에서 각각 정(+)으로 높았다. SCA효과에서 수장은 두산29호×두산8호 조합이, 망장은 진양보리×두산29호 조합이, 간직경은 사천6호×진광보리 조합이, 곡립장은 진양보리×두산8호 조합이, 곡립폭은 진광보리×두산8호 조합이, 1수립수는 진양보리×삼도보리 조합이, 1000립중은 사천6호×두산8호 조합 및 두산29호×두산8호 조합이 각각 정으로 높았고, 간장은 삼도보리×진광보리 조합이 부로서 높았다. RCA효과에서 수장은 두산8호×남향보리 조합이, 망장은 진양보리×삼도보리 조합이, 간직겨은 사천6호×진양보리 조합이, 곡립장은 사천6호×진광보리 조합이, 곡립폭은 진양보리×삼도보리 조합이, 1수립수는 사천6호×두산29호 조합이, 1000립중은 진양보리×두산29호 조합이 각각 정으로 높았고, 간장은 사천6호×두산29호 조합이 부로서 높았다. Seven barley varieties in F_1 generation of the possible crosses among them were used to estimate the combining ability for eight characters, i.e., culm length, spike length, awn length, culm diameter, grain length, grain width, number of grains per spike and 1000 grains weight. Data for F_1 hybrid and parents were subjected to the analysis method proposed by Griffing. The results obtained were summarized as follows. mean squares of general combining ability(GCA), specific combining ability(SCA) and reciprocal combining ability(RCA) were significant for all characters observed. Mean squares of GCA were higher than those of SCA and RCA in culm length, spike length, awn length, culm diameter, grain width, number of grains per spike and 1000 grains weight. Variety Dusan#29 showed the highest GCA effect for number of grains per spike and positively high effects of GCA were observed from variety Samdo bori in spike length, awn length, culm diameter, 1000 grains weight, and from variety Jinkwang bori I grain length, from Dusan#29 in grain width, umber of grains per spike, 1000 grains weight. Also Jinyang bori showed negatively high GCA effect in culm length. In SCA effects, hybrids in Jinyang bori × Samdo bori were exhibited positively high for number of grains per spike and high SCA effects for 1000 grins weight were found positively in Sacheun#6×Dusan#8 and Dusan#29×Dusan#. In RCA effects, hybrids in Sacheun#6×Dusan#29 were exhibited positively high for number of grains per spike and high RCA effects for 1000 grains weight were found positively in Jinyang bori×Dusan#29.
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Effects of Hyperbaric Oxygen and α-Tocopherol on Skin Antioxidant Enzymes Defence in Rats
Jong-Shu Kim,Chung-Hui Kim,Gon-Sup Kim,Dae-Sik Hah,Sun-Gun Park,Yang-Mi Kim 한국독성학회 2001 Toxicological Research Vol.17 No.1
In order to test the effects of hyperbaric oxygen (HBO) and α-tocopherol on full-thickness skin grafts in rats, we performed full-thickness skin grafts bilaterally on rats. After surgery, we analyzed the tissue-concentrations of superoxide dismutase (SOD), catalase, and glutathione peroxidase(GPx)/reductase(GPr) on days 0, 2, 4, 7, 10, 14, 21 and 28. The four groups had similar patterns of change in SOD, catalase, GPx and GPr values. SOD increased initially, and was significantly increased at day 7, returning to the preoperative activity level on day 14 (control, HBO, and α-tocopherol treated alone) and 28 (HBO plus α-tocopherol). Catalase had a similar pattern of change as the SOD enzyme activity, except for the surgical control on day 2. Glutathione peroxidase/reductase activity in the four groups had a similar pattern of enzyme activity, with a significant increase from preoperative level on day 4, peaking during days 7 to 10, and returning to preoperative level on day 21(surgical control, HBO, and α-tocopherol-treated alone) and 28 (HBO plus α-tocopherol treated group). Hence, the clinical use of HBO and α-tocopherol mixture can be recommended as an adjunctive treatment fro free skin grafts in rats. But, the antioxidant used, its dose, and the timing of its administration, as well as, the exposure time and the pressure of HBO, should be the subject of further research.
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Dense dislocation arrays embedded in grain boundaries for high-performance bulk thermoelectrics
Kim, Sang Il,Lee, Kyu Hyoung,Mun, Hyeon A,Kim, Hyun Sik,Hwang, Sung Woo,Roh, Jong Wook,Yang, Dae Jin,Shin, Weon Ho,Li, Xiang Shu,Lee, Young Hee,Snyder, G. Jeffrey,Kim, Sung Wng American Association for the Advancement of Scienc 2015 Science Vol.348 No.6230
<P><B>Squeezing out efficient thermoelectrics</B></P><P>Thermoelectric materials hold the promise of converting waste heat into electricity. The challenge is to develop high-efficiency materials that are not too expensive. Kim <I>et al.</I> suggest a pathway for developing inexpensive thermoelectrics. They show a dramatic improvement of efficiency in bismuth telluride samples by quickly squeezing out excess liquid during compaction. This method introduces grain boundary dislocations in a way that avoids degrading electrical conductivity, which makes a better thermoelectric material. With the potential for scale-up and application to cheaper materials, this discovery presents an attractive path forward for thermoelectrics.</P><P><I>Science</I>, this issue p. 109</P><P>The widespread use of thermoelectric technology is constrained by a relatively low conversion efficiency of the bulk alloys, which is evaluated in terms of a dimensionless figure of merit (<I>zT</I>). The <I>zT</I> of bulk alloys can be improved by reducing lattice thermal conductivity through grain boundary and point-defect scattering, which target low- and high-frequency phonons. Dense dislocation arrays formed at low-energy grain boundaries by liquid-phase compaction in Bi<SUB>0.5</SUB>Sb<SUB>1.5</SUB>Te<SUB>3</SUB> (bismuth antimony telluride) effectively scatter midfrequency phonons, leading to a substantially lower lattice thermal conductivity. Full-spectrum phonon scattering with minimal charge-carrier scattering dramatically improved the <I>zT</I> to 1.86 ± 0.15 at 320 kelvin (K). Further, a thermoelectric cooler confirmed the performance with a maximum temperature difference of 81 K, which is much higher than current commercial Peltier cooling devices.</P>
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Kim, Jong-shu,Kim, Yong-hwan,Choi, Min-cheol,Kim, Gon-sup,Kim, Chung-hui,Park, Jeong-hee,Hah, Dae-sik,Heo, Jung-ho,Jeong, Myeong-ho,An, Dong-won The Korean Society of Veterinary Science 1999 大韓獸醫學會誌 Vol.39 No.4
A national animal health monitoring system(NAHMS) in Gyeongnam area was started from 1997 to develop statistically valid data for use in estimating disease frequencies in dairy cattle, and the associated costs. The objectives of this study were to : (1) discribe what was done to implement and maintain the system in Gyeongnam ; (2) present selected disease frequencies ; (3) discuss the epidemiological consideration of what was done and implications for the results obtained. Veterinary Medical Officers(VMOs-professors and graduate students from Gyeongsang National University, Faculty of Gyeongnam Livestock Promotion Institute, and Clinic veterinarians) served as data collectors. After training on current disease and management problems of dairy cattle, interview techniques, sampling methods, and data collection instruments, the VMOs participated in selection of the sample herds and data gathering. Forty of 167 dairy herds were selected randomly and the VMOs visited farms once a month for 12 months to collect data about management, disease, inventory, production, preventive treatment, financial and any other relevant data. Strict data quality control devices were used. Specific feed-back was developed for the producers and data collectors. Of the three age groups studied, cows had the greatest number of disease problems. The six disorders found most frequently were (from the highest to the lowest) breeding problems, clinical mastitis, birth problems, gastrointestinal problems. metabolic problems, and lameness. In young stock, respiratory, multiple system, breeding problems, and gastrointestinal problems were pre dominant, whereas in calves, gastrointestinal, respiratory, and integumental problems were major.
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