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브로일러 병아리에 있어서 밀기울 , 칼슘 및 소금의 상호작용에 관한 연구
이진희,한인규,백인기 ( J . H . Lee,In K . Han,I . K . Paik ) 한국축산학회 1985 한국축산학회지 Vol.27 No.10
In order to study the interrelationships of dietary such factors as wheat bran, calcium and salt a total number of 480 broiler chicks of Hisex-Hibro strain was fed 3 × 2 × 2 factorially arranged experimental diets for 28 days. In the present experiment were used 3 levels of dietary wheat bran (0, 5, 10%), 2 levels of dietary calcium (0.9, 1.5%) and two supplemental salt levels (0.3, 1.0%). Body weight gain, daily feed intake, feed efficiency and gall bladder weight were measured. And bone calcium content, bone ash content, serum calcium content and serum sodium content were also measured. The results observed in the present study are summarized as following: 1. Body weight gain was gradually and insignificantly decreased as dietary level of wheat bran was increased, and dietary levels of calcium and salt failed to show any significant effects on the body weight gain. But high Ca × high salt gained slightly more body weight than low Ca × low salt. 2. Feed intake was significantly decreased (p$lt;0.01) as the level of wheat bran was increased. Interaction of wheat bran with dietary levels of salt or calcium were found significant (p$lt;0.01); increased level of wheat bran resulted in decreased feed intake when salt level was lowered or when calcium level was increased. 3. Feed efficiency was not affected by any combination of dietary level of the experimental materials, although high Ca × high salt groups showed slihtly improved values. 4. Weight of gall bladder was increased as dietary level of wheat bran was increased or as dietary level of calcium. was decreased (p$lt;0.05), and high salt × high Ca showed heavier gall bladder weight than low salt × low Ca. 5. Bone calcium content was not significantly affected by treatments, except decrease (p$lt;0.05) with high level of wheat bran. Bone ash retention was increased with high dietary salt level and it was more pronounced with high calcium level. 6. Serum calcium content was increased as the dietary levels of wheat bran and calcium were increased (p$lt;0.01). Serum calcium with low calcium × high salt was decreased, but with high calcium × high salt decreased. Serum sodium level was increased with increased dietary levels of calcium or salt (P$lt;0.01), and it was affected by dietary wheat bran level (p$lt;0.01) and seems to be due to interaction between dietary levels of wheat bran and salt.
고체산화물형 연료전지를 위한 10KW급 독립전력변환장치의 개발
이진희(J.H. Lee),조진상(J.S. Jo),장민수(M.S. Jang),최세완(S.W. Choi),한수빈(S.B. Han) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
본 논문은 5KW급의 SOFC와 저전압 배터리를 복합전원으로하는 lOKW급 독립형 연료전지발전시스템의 전력 변환장치의 개발에 관한 것이다 이를 위한 전력변환장치는 연료전지로부터의 저전압을 상승시키기 위한 고주 파 DC-DC 컨버터 및 이를 안정된 교류전원으로 변환하기 위한 DC-AC인버터 그리고 저전압 배터리를 충 ' 방전하기 위한 양방향 DC-DC 컨버터로 구성된다. 미국 에너지부 및 IEEE 가 주최한 "2003 International Future Energy Challenge Competition" 에서 제시한 90%이상의 효율과 $40/KW 이하의 양산가등의 사양을 목표로 개발 된 본 전력변환장치에 대한 토폴로지, 주요 부품의 설계 및 제어방식에 관하여 기술하고 실험결과를 제시한다.<br/>
이진희 ( J H Lee ) 한국축산학회 1969 한국축산학회지 Vol.11 No.4
This study was conducted to find out the actual conditions of breeding difficulties occurrence of cows which cause big trouble on rational dairy farming in Korea and also to obtain basic data for removal plans of these diseases. Research survey was carried out for two years from January, 1966 to December, 1967 with 1,041 dairy cows. The results obtained in this study is summarized as follows: 1. Distribution of cows by age group. There were 2-6 years old cows in abundance by 87% of all cows, and the 3 years of age cow group occupied the largest part by 28.5% of total number. This showed that farmers had an advantage of cows age in feeding cows. 2. Distribution of cows by calving order group. Calving orders of the cows showed that 33.2% of them was from first calving and 3.0, 3.7% from above-5, 6 th calving orders. 3. Conception condition of cows. Conception condition of cows by mating times showed that 47.9% of the cows was conceived at the first mating and 84.1% at the third mating. Repart breeders amounted to 15.9% of the cows. 4. Occurrence of breeding difficulties. The percentage of infertile cows was 31.3%. The diseases taken before conception (ovarian disorder, uterine and vagina diseases) amounted to 15.1% and the diseases taken after conception (abortion, stillbirth, difficult delivery and stagnation of afterbirth etc.) amounted to 16.2%. 5. Relationship between diseases and ages of infertility cows. Ovarian disorder was found in abundance by 26.6% on old age cows (above 7 years old), and the complication (ovarian and uterine disease) by 27.2% on 6 years old cow. Consequently, these diseases had a tendency to be found in old age cows, although, they were found at all ages. 6. Relationship between breeding difficulties and nutrition. Nutritional condition of infertile cows was poor. The percentage of under-nourished cows of infertile cows was 47.4%. Undernourished cows appeared in the case of ovarian disorder by 34.5%, by 61.1% in the complication and by 61.4% in the uterine disease. Supernutrition was found by 10.5% in ovarian disordered cow. 7. Relationship between breeding difficulties and feeding. Feeding condition o these cows showed that cows fed with poor nutrient (T.D.N.) and medium level of protein (D.C.P.) occupied the largest part of them by 42.8%, poor nutrient and low level of protein by 22.6%, poor nutrient and high level of protein by 11.9% and rational condition, medium level of T.D.N. and D.C.P., by only 2.4%. 8. Relationship between breeding difficulties and milk yields. Cows producing above 5,000㎏ of milk per year were found by 52.4% in the group with breeding difficulties and 33.3% in normal group. Four high milk producers producing more than 7,000㎏ per year were found in the disease group. However, there was no such high milking cow in normal group. So it seemed that the more milk a cow produced the more occurrence of breeding difficulties were found.
250㎾급 용융탄산염 연료전지 발전시스템용 전력변환기 개발
이진희(J. H. Lee),정홍주(H. J. Jung),백승택(S. T. Baek),강호현(H. H. Kang),정준모(J. M. Chung),서인영(I. Y. Suh) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
본 논문은 신 발전방식 중 하나인 용융탄산염형 연료전지(Molten Carbonate Fuel Cell. 이하 MCFC) 발전시스템에서 생성된 전력을 계통에 안정적으로 변환, 주입하기 위한 계통연계형 전력변환기를 설계, 제작하고 성능 시험을 수행한 결과이다. 250㎾급 MCFC 시스템의 정격 사양 및 스택의 운전 형태를 기반으로 250㎾급 전력변환기 구조 및 단위기기를 설계하였고, 전력변환기는 크게 DC/DC 컨버터부와 DC/AC 인버터부로 구성된다. 본 논문은 MCFC 발전 시스템에 적용되는 전력변환기(Power Conditioning System, 이하 PCS)를 제작하고 성능을 확인하는데 목적이 있다.
양쪽성 이온 계면활성제의 유도체합성 및 계면성에 관한 연구(제1보)
이진희(Lee J H),하정욱(Ha J W),박홍조(Park H J),노윤찬(No Y C),남기대(Nam K D) 한국유화학회 1994 한국응용과학기술학회지 Vol.11 No.1
In order to review industrial application of amphoteric surfactants, new types of hydroxy sulfobetaine, 3-(N, N-dimethyl N-dimethyl-N-alkylammonio)-2-hydroxy-1-propane sulfonate and 3-(N, N-dimethyl N-acylammonio)-2-hydroxy-1-propane sulfonate were prepared by the reaction of quaternized sodium 1-chloro-2-hydroxy-3-propane sulfonate with N, N-dimethyl-N-alkylamine and N, N-dimethyl N-acylamido propylamine that have a straight chain radical of 12, 18 carbon atoms respectively in the presence of alkali catalyst. All the reaction products could be separated by means of column and thin layer chromatography, and the yields of all products ranged in 85-90%, the structure of them could be confirmed from IR and ¹H-NMR spectra.