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한찬규(C . K . Han),이남형(N . H . Lee) 한국축산학회 1991 한국축산학회지 Vol.33 No.8
The purpose of this study was to examine the fatty acid composition in eggs from the major domestic strains of breeding hen. Eggs from 16 different strain birds were obtained during July, 1990 from the Poultry Random Sample Test Station at Ansung, Kunggi province. Yolk fatty acid compositions were obtained from three consecutively laid eggs who birds were about 63 weeks of age. The yolks of egg from each strain were pooled and to determine the fatty acid pattern of the yolk lipids, 5 g of the egg yolk was ground thoroughly with 100 ㎖ chloroform: methanol (2:1, v/v). A small portion of each extracted lipid sample was converted to methyl esters by transesterification with 14% BF₃- MeOH. The palmitic (16:0), stearic (18:0), oleic (18:1) and linoleic acids (18:2) were the major ind-iviual fatty acids in the egg yolk and formed 29.0, 10.1, 40.2, and 10.2%, respectively. The above fatty acids constituted about 90% of the total. The long-chain (C20 to C22) polyunsaturated fatty acids accounted for up to 4.3% of the total. The major long-chain fatty acid was arachidonic acid (20:4), 1.9%. The concentration of omega3 fatty acids in yolk lipid was a mean value of 3.0% of the total. The ratio of polyunsaturated fatty acid to saturated fatty acid was 1 to 2.5. The only difference found in the two types of strain egg was the percentage of linoleic acids which was 11.0% for the white shell eggs and 9.1% for the brown shell eggs. Significant differences in the major individual fatty acid contents also was found among strains for the white and brown shell eggs, respectively (p$lt;.05).
한찬규(C . K . Han),이남형(N . H . Lee),정영채(Y . C . Chung) 한국축산학회 1989 한국축산학회지 Vol.31 No.2
This experiment was conducted to obtain the basic data and to investigate the effect of prepartum feeding conditions on reproduction and plasma components, with 63 pregnant cows in three areas; rural farms(Yangpyong and Gongju) and a large-scale farm(Seosan). The main results obtained in this experiment were summarized as follows: 1. Daily feed intake on a DM basis during the last trimester of gestation in rural and national farms was 85 %, 105 % and 130 % of NRC recommendation in Yangpyong, Gongju, and Seosan, respectively. 2. First postpartum estrus occurred on 67.9±5.6 days in Yangpyong, 65.0±5.8 days in Gongju. and 43.1± 2.8 days in Seosan, respectively(P$lt;0.01). 3. Al per conception and days open was 1.95 and 98.4 days in Yangpyong, 1.40 and 87.1 days in Gongju, and 1.19 and 68.2 days in Seosan, respective ly (P$lt;0.01). 4. Conception rate at first Al in 3 areas was 42.9% in Yangpyong, 63.2% in Gongju. and 89.5% in Seosan, respectively (P$lt;0.01). 5. Level of plasma progesterone on Day 14 of the estrous cycle before and after conception was significantly higher (p$lt;0.05) in cows of Seosan than in those of Yangpyong and Gongju, indicating that DCP intake affected the progesterone level. 6. β-carotene concentration had a highly significant negative correlation with days from calving to first estrus and days open(r=-0.36, -0.34; P$lt;0.01). There was a tendency that α - tocopherol and Ca concentrations had significant relationships with days from calving to first estrus.
한찬규(C . K . Han),박진홍(J . H . Park),이남형(N . H . Lee),박영일(Y . I . Park) 한국축산학회 1987 한국축산학회지 Vol.29 No.12
A field survey was conducted on the Native Cattle of Korea, to determine the pattern of reproductive performance in general farm and to study the effect of season, province and registration. The least squares were estimated from 6.513 cows raised at general farms in 8 pure-breeding district of Korean native cattle from June, 1984 through November, 1985. The overall means of the respective traits were: age at first estrus, 436.9 days; age at first calving, 809.4 days; age at first estrus postpartum, 72.0 days; calving interval, 383.5 days; the number of AI per conception, 1.51. Normal calving was 94.1%, and abortion and stillbirth comprised 1.7%. The rate of twin calves was 0.5%. Calf mortality during suckling period was 4.5 out of 1000, and cow culling rate was 3.6 out of 1,000.
새우젓을 첨가한 우 , 돈육 젓갈발효에 대한 단백질 분해효소의 영향
김윤지(Y . J . Kim),성기승(K . S . Sung),한찬규(C . K . Han),정재홍(J . H . Jeong),강통삼(T . S . Kang) 한국축산학회 1996 한국축산학회지 Vol.38 No.3
This study was carried on to develop a new fermented meat product which is similar to fermented fish sauce. Sliced(2㎝×8㎝×2㎜) beef or pork treated with proteolytic enzymes [0.05% Novo E89L(NE89L) or 0.5%o Pacific Protease NP(PPNP)] and nonenzyme treated beef or pork were incubated at 55℃ for 4h. Edible salt (NaCl, 25%(w/w)) and 10%(w/w) ground fermented shrimp were added to both enzyme treated sliced meats and untreated meats and then mixed well. Untreated sliced meat with only 25% salt added was used as control. Thiobarbituric acid(TBA), volatile basic nitrogen(VBN) values, and soluble protein content from filtrate of each ground treatment were observed to evaluate the degree of fermentation during 100 days storage at 10 or 20℃. Nonenzyme treated beef or pork was not fermented even after 100 days storage, and there was no significant difference in lipid deterioration between enzyme treated and nonenzyme treated beef or pork. Enzyme treated beef or pork showed higher VBN value than that of nonenzyme treated. However VBN values of enzyme treated meat was much lower(about 15%) than that of fermented anchovy sauce from other published data The soluble protein content of enzyme treated meat was increased by a maximum 2 times of that of nonenzyme treated. The effects of proteolytic enzymes between PPNP and NE89L used were not significantly different. The effect of storage temperature was observed in change of VBN value although not in the change of soluble protein content. The addition of fermented shrimp showed no significant effect on the fermentation of beef or pork.