유우개량을 위한 유단백질의 유전적 다형에 관한 연구 Ⅰ. αS1 - Casein 및 K - Casein 의 유전적 변이체

한상기(Sang K . Han),이기만(Khy M . Lee),정의용(Eui Y . Chung),장경진(Kyung J . Jang) 한국축산학회 1984 한국축산학회지 Vol.26 No.3

Genetic variants of αs₁-casein (αs₁-Cn) and K-casein (k-Cn) in milk proteins from 138 individual Holstein cattle in Korea were investigated by means of strach-gel-urea electrophoresis and the appearance of phenotypes, gene frequencies and genetic similarities were compared with those of foreign Holstein and of her breeds. The results are summarized as follows: 1. The milk proteins in cattle were controlled by codominant autosomal allelic genes of 9αs₁-Cn^A and αs₁-Cn^B(2 types), and K-Cn^A and K-Cn^B (2 types). 2. The distribution of phenotypes in each milk protein loci was αs₁-Cn BB 124, BC 14; K-Cn AA 76 Ab 49, BB 13. The number of phenotypes coxesponded closely to expectation of Hardy-Weinberg equilibrium (αs₁-Cn:0.7 $gt;P$gt;0.5, k-Cn;0.7$gt;P$gt;0.5). 3. Gene frequencies for genetic variants of the milk protein loci were analyzed. By the predominant allele in αs₁-Cn was αs₁-Cn B with a frequency of 0.949, whereas αs₁-CnC was in low gene frequency (0.051). Among the two alleles for K-Cn, K-Cn A gene showed to occur in high frequency (0.728). However, the Kin B was in low gene frequency (0.272).

Ir 전극 계면에서 위상이동 방법 및 상관계수를 이용한 수소의 흡착동온식 결정

전상규,Jeon, Sang-K. 한국전기화학회 2007 한국전기화학회지 Vol.10 No.2

백금족/수용액 계면에서 Langmuir, Frumkin, Temkin 흡착등온식(${\theta}\;vs.\;E$)을 결정하기 위해 최적중간주파수 일 때 위상이동($0^{\circ}{\leq}-{\varphi}{\leq}90^{\circ}$) 거동($-{\varphi}\;vs.\;E$)과 표면피복율($1{\geq}{\theta}{\geq}0$) 거동(${\theta}\;vs.\;E$) 사이의 선형 관계식 연구에 관한 위상이동 방법 및 상관계수를 제안하고 증명하였다. Ir/0.1 M KOH수용액 계면에서 음극 $H_2$ 발생 반응에 관한 수소의 Langmuir 및 Temkin 흡착등온식(${\theta}\;vs.\;E$), 평형상수(Langmuir 흡착등온식: $K=3.3{\times}10^{-4}mol^{-1}$, Temkin 흡착등온식: $K=3.3{\times}10^{-3}{\exp}(-4.6{\theta})\;mol^{-1}$), 상호작용 파라미터(Temkin 흡착등온식: g=4.6), 표준자유에너지($K=3.3{\times}10^{-4}mol^{-1}$ 일 때 ${\Delta}G_{ads}^0=19.9kJ\;mol^{-1},\;K=3.3{\times}10^{-3}{\exp}(-4.6{\theta})\;mol^{-1}$ 및 $0.2<{\theta}<0.8$일 때 $16.5<{\Delta}G_{\theta}^0<23.3kJ\;mol^{-1}$)를 결정한다. 수소 흡착부위의 비균일 및 측 방향 상호작용 효과는 무시할 수 있다. ${\theta}$의 중간값 즉, $0.2<{\theta}<0.8$일 때 Langmuir 또는 Frumkin 흡착등온식과 상관관계에 있는 Temkin 흡착등온식은 상관계수를 이용하여 쉽게 결정할 수 있다. 위상이동 방법 및 상관계수는 흡착동온식(${\theta}\;vs.\;E$) 및 연관된 전극속도론과 열역학 파라미터(K, g, ${\Delta}G_{ads}^0, {\Delta}G_{\theta}^0$)를 결정하기 위한 정확하고 확실한 기술 및 방법이다. The phase-shift method and correlation constants for studying a linear relationship between the behavior ($-{\varphi}\;vs.\;E$) of the phase shift ($0^{\circ}{\leq}-{\varphi}{\leq}90^{\circ}$) for the optimum intermediate frequency and that (${\theta}\;vs.\;E$) of the fractional surface coverage ($1{\geq}\theta{\geq}0$) have been proposed and verified to determine the Langmuir, Frumkin, and Temkin adsorption isotherms (${\theta}\;vs.\;E$) at noble metal/aqueous electrolyte interfaces. At an Ir/0.1 M KOH aqueous electrolyte interface, the Langmuir and Temkin adsorption isotherms (${\theta}\;vs.\;E$), equilibrium constants ($K=3.3{\times}10^{-4}\;mol^{-1}$ for the Langmuir and $K=3.3{\times}10^{-3}{\exp}(-4.6{\theta})\;mol^{-1}$ for the Temkin adsorption isotherm), interaction parameter (g = 4.6 for the Temkin adsorption isotherm), and standard free energies (${\Delta}G_{ads}^0=19.9kJ\;mol^{-1}\;for\;K=3.3{\times}10^{-4}\;mol^{-1}$ and $16.5<{\Delta}G_{\theta}^0<23.3\;kJ\;mol^{-1}\;for\;K=3.3{\times}10^{-3}{\exp}(-4.6{\theta})\;mol^{-1}\;and\;0.2<\theta<0.8$) of H for the cathodic $H_2$ evolution reaction are determined using the phase-shift method and correlation constants. The inhomogeneous and lateral interaction effects on the adsorption of H are negligible. At the intermediate values of ${\theta},\;i.e,\;0.2<{\theta}<0.8$, the Temkin adsorption isotherm (${\theta}\;vs.\;E$) correlating with the Langmuir or the Frumkin adsorption isotherm (${\theta}\;vs.\;E$), and vice versa, is readily determined using the correlation constants. The phase-shift method and correlation constants are accurate and reliable techniques to determine the adsorption isotherms (${\theta}\;vs.\;E$) and related electrode kinetic and thermodynamic parameters(K, g, ${\Delta}G_{ads}^0, {\Delta}G_{\theta}^0$).

The Phase-Shift Method for the Langmuir Adsorption Isotherms of Electroadsorbed Hydrogens for the Cathodic H₂ Evolution Reactions at the Poly-Pt Electrode Interfaces

천장호,전상규,이재항,Chun, Jang H.,Jeon, Sang K.,Lee, Jae H. The Korean Electrochemical Society 2002 한국전기화학회지 Vol.5 No.3

순환전압전류 및 교류임피던스 기법을 이용하여 다결정 Pt/0.5M $H_2SO_4$ 및 0.5M LiOH수용액 계면에서 저전위 수소흡착(UPD H) 과 전위 수소흡착(OPD H)에 관한 Langmuir 흡착등온식 $({\theta}\;vs.\;E)$ 을 연구조사 하였다. 계면에서 치적중간주파수일 때 위상이동$(0^{\circ}{\leq}{-\phi}{\leq}90^{\circ})$ 거동은 표면피복율$(1{\geq}{\theta}{\geq}0)$ 거동에 정확하게 상응한다. 위상이 동 방법 즉 최적중간주파수일 때 위상이동 변화$({-\phi}\;vs.\;E)$는 계면에서 음극 $H_2$ 발생 반응에 관한 UPD H와 OPDH의 Langmuir흡착등온식을 결정할 수 있는 새로운 전기화학적 방법으로 사용할 수 있다 다결정 Pt/0.5M $H_2SO_4$ 수용액 계면에서 OPD H의 흡착평형상수(K)와 표준자유에너지$({\Delta}G_{ads})$는 각각 $2.1\times10^{-4}$와 21.0kJ/mol 이다. 다결정 Pt/0.5M LiOH 수용액 계면에서 K는 음전위(E)에 따라 2.7 (UPD H)에서 $6.2\times10^{-6}$ (OPD H) 또는 $6.2\times10^{-6}$(OPD H)에서 2.7 (UPD H)로 전이한다. 유사하게 ${\Delta}G_{ads}$는 E에 따라 -2.5kJ/mol (UPD H)에서 29.7kJ/mol (OPD H)또는 29.7kJ/mol (OPD H)에서 -2.5kJ/mol (UPD H)로 전이한다. K와 ${\Delta}G_{ads}$의 전이는 다결정 Pt전극 표면의 상이한 UPD H와 OPD H의 흡착부위에 기인한다. 다결정 Pt전극 계면에서 UPD H와 OPD H는 음극 $H_2$ 발생 반응에 따른 순차적 과정이 아니라, 수소 흡착부위 자체에 따른 독립적 과정이다. UPD H와 OPD H의 기준은 음극 $H_2$발생 반응과 전위가 아니라, 수소 흡착부위와 과정이다. 수용액에서 음극 $H_2$발생 반응에는 다결정 Pt선 전극이 단결정 Pt(100)원반 전극보다 더 효율적이고 유용하다 위상이동 방법은 열역학적 방법과 상충적이 아니라, 보완적이다. The Langmuir adsorption isotherms of the under-potentially deposited hydrogen (UPD H) and the over-potentially deposited hydrogen (OPD H) at the poly-Pt/0.5M $H_2SO_4$ and 0.5 M LiOH aqueous electrolyte interfaces have been studied using cyclic voltammetric and ac impedance techniques. The behavior of the phase shift $(0^{\circ}{\leq}{-\phi}{\leq}90^{\circ})$ for the optimum intermediate frequency corresponds well to that of the fractional surface coverage $(1{\geq}{\theta}{\geq}0)$ at the interfaces. The phase-shift method, i.e., the phase-shift profile $({-\phi}\;vs.\;E)$ for the optimum intermediate frequency, can be used as a new electrochemical method to determine the Langmuir adsorption isotherms $({\theta}\;vs.\;E)$ of the UPD H and the OPD H for the cathodic $H_2$ evolution reactions at the interfaces. At the poly-Pt/0.5M $H_2SO_4$ aqueous electrolyte interface, the equilibrium constant (K) and the standard free energy $({\Delta}G_{ads})$ of the OPD H are $2.1\times10^{-4}$ and 21.0kJ/mol, respectively. At the poly-Pt/0.5M LiOH aqueous electrolyte interface, K transits from 2.7(UPD H) to $6.2\times10^{-6}$ (OPD H) depending on the cathode potential (E) and vice versa. Similarly, ${\Delta}G_{ads}$ transits from -2.5kJ/mol (UPD H) to 29.7kJ/mol (OPD H) depending on I and vice versa. The transition of K and ${\Delta}G_{ads}$ is attributed to the two distinct adsorption sites of the UPD H and the OPD H on the poly-Pt surface. The UPD H and the OPD H on the poly-Pt surface are the independent processes depending on the H adsorption sites themselves rather than the sequential processes for the cathodic $H_2$ evolution reactions. The criterion of the UPD H and the OPD H is the H adsorption sites and processes rather than the $H_2$ evolution reactions and potentials. The poly-Pt wire electrode is more efficient and useful than the Pt(100) disc electrode for the cathodic $H_2$ evolution reactions in the aqueous electrolytes. The phase-shift method is well complementary to the thermodynamic method rather than conflicting.

K-NOW: Preparing for Climate Change

Won Sang Lee,K-NOW Team 한국기상학회 2023 한국기상학회 학술대회 논문집 Vol.2023 No.11

通信網의 局間 容量 決定에 관한 發見的解法

성창섭,손진헌,이강배 한국경영과학회 1993 韓國經營科學會誌 Vol.18 No.1

This paper condisers a problem of determining arc capacities for a communication network with fixed-charged linear arc-cost functions, which is known to be NP-hard. For the problem, an efficient heuristic solution procedure is derived. The procedure is further shown working well for designing arc capacities of a network in a situation where the network needs to be extended by connecting its nodes to some new nodes or where the network needs to be extended by expanding its arc capacities.

사료내 지방산 조성이 등지방 두께 및 돼지 혈액의 지방산 조성에 미치는 영향

성기승,이무하,김윤지,강통삼,신대근,권찬호 한국축산학회 1999 한국축산학회지 Vol.41 No.1

The effects of feeding isofat (8%) diets with different ratios of ω-3, ω-6 and ω-9 unsaturated fatty acids (UFA) were investigated to evaluate the accumulation of UFA in blood and growth rate of pigs. Landrace x Yorkshire x Large white crossbred pigs(36 heads) weighing 70㎏ on the average were randomly assigned to 5 treatments and a control. Each of animals was fed a diet with the different ω-fatty acid ratio for about 46 days, reaching 110㎏ of body weight. Dietary fat content was 8% and ω-3, ω-6 and ω-9 UFA ratios were divided to 5 groups(1:1.5:2, 1:2:3, 1:1:1, 1:2:1, 1:3:1). Average body weight gain and feed efficiency of the pigs were not influenced by the dietary ω-UFA ratio. But back fat thickness was influenced by the ratios in the end of the point(P$lt; 0.05). In the C treatment fed diet that the ratio of ω-3, ω-6 and ω-9 UFA was 1 : 1 :1, back fat thickness was the thickest as 21.00±2.10mm. But in D treatment fed diet containing ω-3, ω-6 and w-9 UFA was 1:2:1, back fat thickness(17.40±1.52mm) was thinner than other treatments. Correlations of saturated fatty acid(SFA), polyunsaturated fatty acid(PUFA), monounsaturated fatty acid(MUFA), ω-3, ω-6 and ω-9 fatty acid were examined between blood and diet. Positive correlation was shown in PUFA, ω-3 and ω-6 fatty acid ratio between blood and diet(P$lt; 0.01) and in PUFA/SFA between blood and diet(P$lt; 0.05). In this study, as the PUFA increased in diet the MUFA decreased in blood and as the ω-3 fatty acid increased in diet the ω-6 fatty acid decreased in blood because ω-3 fatty acid increased in blood.

국제회계기준 도입의 영향과 대응방안

김진희,이성원 大田大學校 社會科學硏究所 2010 社會科學論文集 Vol.28 No.2

국제회계기준(IFRS)이란 회계처리에 대한 국제적 통일성을 높이기 위해 국제회계기준위원회 OASB)가 공표하는 범세계적인 회계기준으로 현재 전 세계 110여 개 국에서 시행 혹은 전면적인 도입을 진행 중이며, 우리나라는 국제회계기준을 전면 수용하여 2011년부터 모든 상장기업을 대상으로 일괄도입할 예정이다. 국제회계기준은 원칙중심의 회계기준으로 경제적 실질에 따른 회계처리와 연결재무제표 중심의 재무제표 작성이 이루어지며 모든 자산과 부채에 대한 공정가치평가를 원칙으로 하고 있으므로 국제회계기준의 도입은 기업 재무구조 및 기업가치의 변화를 가져오게 될 것이다. 따라서 국제회계기준의 성공적 도입을 위해서는 기업의 자체적인 대응전략과 함께 정책당국의 제도적인 정비가 요구된다. 국제회계기준의 도입은 우리나라 회계투명성을 제고시킬 수 있는 좋은 기회로서 기업, 투자자, 감독당국 등 모든 시장참여자들이 국제회계기준에 대한 성공적인 정착을 위한 준비와 노력을 해야 할 것이다. IFRS(International Financial Reporting Standards) was established to consolidated differing international accounting standards which is adopted by the IASB(International Accounting Standards Board). IFRS is used as the accounting standard for the international capital market. Currently, over 110 different nations and 80% of the OECD countries have adopted the IFRS as their accounting standard, so that increasingly IFRS is becoming the global trend. Korea will be wholly adopted in a Big Bang style. In 2011, all listed firms must adopt the international accounting standard. IFRS are considered principles based set of standards in that they establish board rules as well as dictating specific treatments. The ultimate parent/ holding company of a group must produce consolidated financial statements including all of its subsidiaries. All assets and liabilities must be evaluated by fair value. Adopting IFRS is to improve the transparency of Korean capital market, there needs to be comprehensive reform that encompasses the legal system, financial supervision, and the stock market.

조혈모세포이식을 받은 급성 골수 백혈병 환자에서 발생한 cyclosporine에 의한 양측 시신경병증

정진권,김한조,박명진,하승주,최경식,이성진,박성희,이상철,이남수,박희숙,원종호 순천향대학교 의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.2

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Vitamin C 와 Vitamin E 처리가 한우육의 육색 및 지방산화에 미치는 영향

성삼경,김수민,이신호 한국축산학회 1997 한국축산학회지 Vol.39 No.3

The effects of vitamin C concentration and vitamin E on lipid peroxidation and meat color were determined by spraying the vitamins on meat, Binding them together, and storing at 5℃ either in a dark room or a fluorescent lighted room. The meat in the dark room showed low TBARS value. Vitamin C was effective to retard the pigment and lipid oxidation, irrespective of storage conditions. However, there were not significant differences between 1% vitamin C and 3% vitamin C groups. The treatment of vitamin C and vitamin E played a role as the most powerful antioxidants to reduce lipid oxidation. The concentration of vitamin C tended to be decreased gadually with times and 3% vitamin C had the highest degradation rate. The effects of vitamin C concentration on meat color and meat flavour were determined at the difTerent storage conditions. The lightness of meat color treated with I% vitamin C and 3% vitamin C fumed out to be very high at dark room until 5 days. The redness of meat color had very similar tendency to the lightness of meat color at dark room until 5 days. After 5 days of storage, there were not significant differences. The result of the sensory test indicated that the change of meat color tended to be decreased gradually, but there were not significant differences during storage at 5℃. However, vitamin C treatment had a slightly higher score in meat color than that of control after storage for 5 days, irrespective of storage conditions(P$lt;0.05). Meat with 3% vitamin C was the most effective to keep meat color during the storage for 10 days. And also, meat flavour tended to be decreased during storage at 5℃, but there were not distinct differences according to vitamin C concentration.

녹용분말 급여가 성장기별 흰쥐의 성장 및 장기발육에 미치는 효과

성하균,김동균,신형태 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.5

The velvet antler of Korean sika deer has been used to the important resources for human health care with ginseng in Korea and Chinese. For studying on biological function of deer velvet being recorded in many ancient literatures, this experiment was conducted to evaluate the effects of powdered velvet antler on growth, feed intake, feed efficiency and intestinal organ development in growing and adult Sprague-Dawley Rats. Experiments were designed by adding amount of powdered velvet antler such as control (non-supplementation), powdered velvet antler Ⅰ (PVA Ⅰ, recommended dos) and powdered velvet antler Ⅱ (PVA Ⅱ, thrice recommended dose). The recommended dose of powdered velvet in this experiment was calculated with metabolic body weight of rats, which based on the recommended amounts for 70㎏ of human. The growths of growing and adult rats generally appeared advantage in PVA supplementation. The final body weight of control, PVA Ⅰ and Ⅱ were respectively 470±39.00g, 478±3033g and 475±22.72g in growing rats, and 485±38.50g, 521±38.67g and 508±34.44g in adult rats. The average daily feed intake were not significantly influenced but the feed efficiency ratios (feed/gain) were improved by PVA supplementation. The feed/gain ratios of control, PVA Ⅰ and Ⅱ were respectively 5.99, 5.47 and 5.54 in growing rats, and 9.04m 7.73 and 8.18 in adult rats. In case of developments of liver, heart, kidney and stomach, we obtained favorable results in both PAC Ⅰ and Ⅱ, but their results were not significantly different according to amount of PVA supplementation. Because liver and heart are important organs in the circulation of blood, their favorable effects suggest that velvet antler may have factors contributing hematopoiesis. Conclusively, supplementation of that velvet antler may have factors contributing hematopoiesis. Conclusively, supplementation of powdered velvet antler resulted in an improved growth, feed efficiency and development of some intestinal organs in growing and adult rat. Even if further investigation of dose in human health care are should be performed, this experiment appeared the best desirable results in PVA Ⅰ, recommended dose of powdered velvet antler.