한국재래산양육의 지질 및 지방산 조성에 관한 연구

하정기,안병홍,이영애,강동학,김종규 ( J . K . Ha,B . H . Ahn,Y . Y . Lee,D . H . Kang,J . K . Kim ) 한국축산학회 1986 한국축산학회지 Vol.28 No.10

This experiment was carried out to investigate the fatty acid composition of lipid in Korean native goat`s meat. M. triceps brachial, M. biceps femoris and M. obliquus internus abdominis were isolated from the three Korean native goats weighting 28Kg and total lipids were extracted from the above muscles, respectively. Triglycerides(TG), glycolipid(GL) and phospholipid(PL) of the above muscles were determined by column chromatography and lipid fractions drived from the TG, GL and PL were separated using thin layer chromatography (TLC). Fatty acid composition of total lipid and triglycerides isolated from the above muscles was determined by gas liquid chromatography(GLC). The results obtained were as follows: Korean native goat`s meats were low in triglycerides and high in phospholipids and glycolipids. In the fatty acid composition, goat`s meats were high in C_(18:1) and low in C_(18:0), Also goat`s meats contained more unsaturated fatty acid than saturated fatty acid. Triglyceride(TG) and sterylester(SE) were more than other in the neuteral lipids. Esterified glycoside(ESG) and monogalactosyl diglyceride(MGDG) were higher than other in the glycolipids. Diphosphatidyl glycerol(DPG) and phosphatidyl ethanolamine(PE), were higher than other in the phospholipids. In the fatty acid composition of triglycerides, M. triceps brachial, M biceps femoris and M. obliquus internus abdominis were altogether higher in C_(16:0) C_(18:0) and C_(18:1) than other in the 1-position of triglycerides and higher in C_(14:0), C_(18:2) and C_(18:3) than other in the 2-position of triglycerides.

계란(鷄卵)의 난각파손(卵殼破損) 방지(防止)를 위한 난좌(卵座) 개발(開發)에 관한 연구(硏究)

하정기,이상진,박용운,황보종,정선부,Ha, J.K.,Lee, S.J.,Park, Y.Y.,Hwang-Bo, J.,Chung, S.B. 한국가금학회 1994 韓國家禽學會誌 Vol.21 No.1

난좌(卵座)의 구면(球面)과 난각(卵殼)의 구면(球面)이 계란(鷄卵)의 파각도(破殼度)에 미치는 영향(影響)을 구명(究明)코져 실험(實驗)을 실시(實施)하였던바 다음과 같은 결과(結果)를 얻었기에 보고(報告)하는 바이다. 1. 9개 국가(國家)(미국, 프랑스, 이태리, 태국, 일본, 네델란드, 러시아, 한국, 스위스)에서 수집(蒐集)한 22종의 난좌형태(卵座形態)를 조사(調査)한 결과(結果), 우리 나라의 난좌(卵座)를 제외(除外)한 8개 국가(國家)의 난좌(卵座)는 그 세부(細部) 형태(形態)가 모두 상이(相異)하였다. 2. 4개의 모형난좌(模型卵座)에서 파각도(破殼度)를 측정(測定)한 결과(結果) B형, D형이 가장 파격도(破格度)가 높은 결과(結果)였다. 앞으로 난좌(卵座)를 제조(製造)할시 계란(鷄卵)의 구면(球面)과 난좌(卵座)의 구면(球面)이 서로 알맞아 파각도(破殼度)를 높일 수 있는 본(本) 시험(試驗)의 B형과 D형으로 제조(製造)하는 것이 가장 바람직할 것으로 사료되었다. 난좌가 견고하다고 해서 파각도가 높아지는 것은 아니었다. 본(本) 실험(實驗)에 공시(供試)한 전체(全體) 계란(鷄卵)의 난각(卵殼) 두께 성적의 통계 처리 결과 유의성이 없었다(P>0.05). 3. 난좌(卵座)에 포장(包裝)되어 계란(鷄卵)이 수송(輸送)될 때, 그 계란(鷄卵)의 구면(球面)에 따라 난좌(卵座)의 형(型)이 얼마나 넓은 면적(面積)으로 감쌀 수 있느냐가 파각도(破殼度)를 좌우(左右)하는 중요(重要)한 관건(關鍵)임을 알 수 있었다. 따라서 난좌(卵座) 제조시(製造時) 상단부(上段部) 난중(卵重)이 하단부(下段部) 난좌(卵座) 내부(內部)의 계란(鷄卵)에 미치는 하중(荷重)을 고려해서 난좌(卵座)의 내부구면(內部球面)과 계란(鷄卵)의 외내부구면(外內部球面)이 알맞을 수 있도록 만들어야 할 것으로 사료(思料)되었다. 4. 현재(現在) 우리나라에서 실시(實施)하고 있는 것처럼 1개의 난좌형(卵座型)으로 대란(大卵), 중란(中卵) 및 소란(小卵)을 공통(共通)으로 사용(使用)하는 것보다는 난중(卵重)에 따른 적정(適正) 난좌(卵座)가 개발(開發)되어 사용(使用) 될 수 있는 방안(方案)도 강구(講究)되어야 할 것으로 사료(思料)되었다. This study was carried out to investigate the effects of shperical surface of eggs tray and eggshell on breaking strength of eggs for the development of a new egg tray design to prevent eggshell breakage. The results obtained were as follows: 1. According to the results obtained from investigation on the types of 22 egg trays collected from 9 countries(USA, Italy, France, Thailand, Japan, Netherland, Russia, Korea and Swiss), all egg trays except those from Korea were different in their types. 2. According to the determination of breaking strength for 4 pilot egg trays, type B and D were high in breaking strength. Trays B and D which would fit with the spherical surface of egg so that they could increase breaking strength were most recommendable. Breaking strength was not increased even though egg tray was strong. Thickness of eggshell of experimental eggs used in this experiment have no significance (P>0.05). 3. When eggs are packed and transported in egg tray, the breaking strength will depend on how much spherical surface of egg are covered by the spherical surface of the egg tray. Therefore, the inner spherical surface of egg tray must fit to the outer spherical surface of eggs when the egg tray is manufactured. 4. At present, there is only one type of egg tray being used in Korea despite the various egg sizes. In order to minimize the eggshell breakage, however, proper sizes or types of egg trays should be developed for each different categories of the egg size.

가온온도 및 진탕시간이 전란, 난황 및 난백의 점도 변화에 미치는 효과

하정기,나재천,강보석,이진건,이상진,김지혁,Ha J. K.,Na J. C.,Kang B. S.,Lee J. G.,Lee S. J.,Kim J. H 한국가금학회 2004 韓國家禽學會誌 Vol.31 No.3

전란(whole egg), 난황 및 난백이 가온 온도와 진탕 시간에 따라 점도가 어떻게 변화하는가를 구명하기 위하여 본 실험을 실시하였다. 가열처리는 진탕 수조를 사용하여 35$^{\circ}C$, 45$^{\circ}C$, 및 5$0^{\circ}C$에서 점도는 진탕후 0, 3, 6, 9, 12시간에 측정하였다. 전란은 처리온도(over-all mean)간에 있어서 35$^{\circ}C$와 45$^{\circ}C$구간에서는 유의차가 없었으나, 5$0^{\circ}C$구는 35$^{\circ}C$와 45$^{\circ}C$구 에 비하여 유의하게 점도가 낮았으며(P < 0.05), 난황의 경우처리 온도간에서 유의성이 없었으나, 진탕 시간간에서는 유의성이 인정되었다(P < 0.05). 그리고 난백은 처리 온도와 진탕 시간간에서는 유의성(P < 0.05)이 없었다. 위의 실험결과 계란을 가공 이용코자 할 경우 전란은 5$0^{\circ}C$에서는 3시간 이상, 난황은 35$^{\circ}C$와 45$^{\circ}C$에서는 3시간 이상, 그리고 5$0^{\circ}C$에서는 3~9시간, 난백의 경우는 5$0^{\circ}C$에서 0, 9 및 12시간 각각 진탕 처리한 후 사용할 수 있으리라 판단된다. The experiment was performed to investigate the effect of heating temperature and shaking time on viscosity change of whole egg, yolk, and albumen. Shaking water bath was used at 35, 45, and 50$^{\circ}C$ and the viscosity was measured at 0, 3, 6, 9, and 12 hours. There were no significant differences in viscosity of whole egg between 35$^{\circ}C$ and 45$^{\circ}C$( over-all mean). However, the 50$^{\circ}C$ group showed significantly lower viscosity compared to 35 or 45$^{\circ}C$ groups(P < 0.05). Non-significant differences were noticed in yolk viscosity among temperature treatments, but there were significant differences among shaking times(P < 0.05). Heating temperature and shaking time did not show significant effect on the viscosity of albumen, but the lowest viscosity was shown at 0, 9, and 12 hours at 50$^{\circ}C$. The results suggest that whole egg, yolk, and albumen should be treated for more than 3 hours at 50$^{\circ}C$, more than 3 hours at 35$^{\circ}C$ and 45$^{\circ}C$ and 3~9 hours at 50$^{\circ}C$, and 0, 9, 12 hours at 50$^{\circ}C$, respectively and then can be used in the processing.

병아리사료에 밀기울대체로서 말 ( 柳藻 Potamogeton oxyphyllus Mig . ) 의 효과

하정기,송우준,고영두 ( J . K . Ha,W . J . Song,Y . D . Ko ) 한국축산학회 1975 한국축산학회지 Vol.17 No.2

To evaluate the nutritive values of Duckweed(Potamogeton Oxyphyllus Mig.) replacing wheat bran at the level of 4, 6, 8, 10% in the rations of chicks, 150 female chicks of Babcock strain were allotted into four groups. The results obtained from the feeding trial of 8-week period were summarized as follows: 1. No significant differences among the treatments in the growth rates, feed intakes, and feed efficiencies of chicks were found. 2. Economic feasibility data by fixing the cost of Duckweed meal at 17 won/㎏ showed an increasing order of the feed cost required for 8 weeks per chick in the order of 8%, 6%, 10%, 4.0% and control group. 3. No toxic effects were found throughout the experimentation. The colour of faces excreated were appeared to be dark green, when the birds were received Duckweed. It might be, therefore, concluded that the wheat bran in the ration of chicks could be replaced by Duckweed safely and economically up to about 10% of the total ration.

한국재래유산양 (韓國在來幼山羊) 의 출생후 발육에 따른 제2위의 형태적 변화에 관한 연구

하정기(J . K . Ha),곽기훈(G . H . Kwak) 한국축산학회 1992 한국축산학회지 Vol.34 No.2

This experiment was conducted to investigate the morphological development of reticulum of Korean native young goats, which were purchased at a Chinju animal market and farms. The number of Korean native young goats slaughtered and examined was 4, 4, 4, 4, 3. 3, 3, 3, 3 and 3 at 2. 6. 15. 21. 30, 40, 60, 90. 120 and 150 days of age, respectively. Three items (body weight, chest girth and body length) in the external body form and 9 items (R.L., right and left reticulum length; U.L.. upper and lower reticulum length: reticulum weight; reticulum area; U.P.C.R., upper and lower length of one polygon located at central part of reticulum; R.P.C.R., right and left length of one polygon located at central part of reticulum; T.P.C.R.. thickness of polygon wall located at centeral part of reticulum; T.P.M.R., thickness of polygon wall located at middle part of reticulum; and T.P.E.R., thickness of polygon wall located at edge part of reticulum) in the reticulum morphology were investigated for the each group. The results were summarized as follows ; In general, all values of the items investigated tended to be elevated by age, however, these values were as much as about 53-78% of those from matured Korean native goats. Number of correlation coefficients obtained among 12 items were 66. and correlation coefficients among 61 items were significant(P$lt;0.05). Correlation coefficients and regression equation between reticulum weight vs. reticulum area (r₁), and reticulum weight vs. U.P.C.R. (r₂) were r₁=0.9252** and Y=11.963+2.393X, and r₂=0.8997** and Y=2.803+0.168X, respectively. Correlation coefficients and regression equation between reticulum area vs. U.P.C.R. (r₁), and reticulum area vs. R.P.C.R. (r₂) were r₁=0.9287** and Y=2.1221-0.067X, and r₂=0.9007** and Y=3.382+0.094X, respectively.

특별강연 및 학술연구 발표요지 : 제2분야: 잡초생리생태 및 기타 ; 잡초성 벼의 내염성관련 proteomics

하정기 ( J. K. Ha ),손영걸 ( Y. G. Shon ),이증주 ( J. J. Lee ) 한국잡초학회 2006 한국잡초학회 별책(학술대회 초록집) Vol.26 No.2

한국 재래산양의 제1위와 제3위 형태의 상호관계에 관한 연구

하정기 ( J . K . Ha ) 한국축산학회 1983 한국축산학회지 Vol.25 No.5

This experiment was carried out to investigate the relationship between rumen which is performing fermentative digestion and omassum which is performing mechanical digestion their morphological characteristics of the Korean native goat. The results obtained are as follows: 1. The items investigated in rumen part were 27 of right and left length of rumen, upper and lower length of rumen, ingesta and stomach weight, stomach weight, rumen weight, and area, thickness (max.), weight, papilae width, papilae length of dorsal sac, caudal dorsal blind sac, and cranial dorsal blind sac parts, caudal ventral blind sac part, ventral sac part, and minimum thickness of dorsal blind sac, cranial dorsal blind sac, and cranial dorsal blind sac parts, causal ventral blind sac part, and ventral sac part. 2. The items investigated in omasum part were 14 of upper and lower length from Facies parletalis to Facies visceralis part (L.F.V.O), right and left length from superior dorsal extremitas (dorsal) to inferior ventral extremitas (ventral) part (L.S.LO), weight of omasum (W.O), area of omasum (A.O), number of the laminae (N.L.O), thickness of the omasum wall of dorsal part (T.O.D.O), thickness of the omasum wall of posterior side (T.O.P.O), thickness of the omasum wall of ventral part (T.O.V.O), width of the largest laminae (W.L.O), area of the largest laminae (A.L.O) weight of the largest laminae (W.L.A.O), width of the second large (middle) laminae (W.L.L.O), area of the second large (middle) laminae (A.S.L.O), and weight of the second large (middle) laminae (W.S.L.O). 3. Correlation coefficients were measured between traits of omasum and rumen: Papillae width and papillae length of rumen were not related to those of omasum. Thus, the dependence of omasum on feed quality; i.e. physical properties of feed, was suggested but the development of papillae was coasidered to be not significantly affected by the feed quality. 4. Among the traits of omasum observed, six traits, that is, W.O,A.O,T.O.P.O, A.L.O, W.L.A.O, and W.S. L.O were found to be closely related to those of rumen. 5. Correlation coefficients and regression equation between live weight and omasum weight was found to be Y = 4.903 + 0.288 X (r = 0.8349**) 6. Correlation coefficients and regression equation between chest girth and omasum weight was found to be Y = 44.855 + 0.311 X (r = 0.6722**) 7. Correlation coefficients and regression equation between omasum area, vs. dorsal sac, caudal dorsal blind sac, and cranial dorsal blind sac area (r₁), omasum area vs. caudal ventral blind sac area (r₂), and omasum area vs. ventral sac area (r₃) were r₁ = 0.7195** and Y^ = 132.722 + 7.206 X, r₂ = 0.9473** and Y^ = 28.714 + 2.850 X, and r₃ = 0.6447** and Y^ = 34.016 + 4.672 X, respectively. 8. Correlation coefficients and regression equation between omasum weight vs. dorsal sac, caudal dorsal blind sac, and cranial dorsal blind sac weight (r₁), omasum weight vs. caudal ventral blind sac weight (2) and omasum weight vs. ventral sac weight (r₃) were r₁ = 0.8620** and Y^ = 6.116 + 4.029 X, r₂ = 0.8444** and Y^ = 1.837 + 0.851 X, and r₃ = 0.8235 ** and Y^ = -4.975 + 2.361 X, respectively.

한국 재래산양의 제2위와 제3위형태의 상호관계에 관한 연구

하정기 ( J . K . Ha ) 한국축산학회 1985 한국축산학회지 Vol.27 No.1

This study was carried out to investigate the relationship between the morphological characteristics of reticulum which has buffering (intermediary digestion of rumen and omasum) and omasum which is performing mechanical digestion in Korean native goats. The results obtained are as follows: 1. The trials investigated in the parts of reticulum and omasum were 23 and 14. Number of correlation coefficients obtained between total 37 trials were 308, and it was a tendency that correlation coefficients were significant in 79 items. The unique digestive function of buffering digestion in reticulum and mechanical digestion in omasum was found. however, a close relationship was found in the weight and tissue thickness between reticulum and ornasum. 2. Correlation coefficients and regression equation between reticulum weight VS. omasum weight(r₁), reticulum weight VS. W.L.O.O. (weight of the largest laminae omasi in the omasum):r₂, and reticulum weight VS. A.S.L.O. (area of the second large laminae omasi in the omasum) : r₃ were r₁ = 0.9180^(**) and Y^ = 0.353 + 0.829X, r₂ = 0.8815^(**) and Y^ = 0.739 + 0.031X, and R₃ = 0.8414^(**) and Y^ = 0.173 + 0.020X, respectively. 3. Correlation coefficients and regression equation between omasum weight VS. A.P.E.R. (area of one polygon located at edge part of reticulum): r₁, and reticulum weight VS. A.L.O. (area of the largest laminae omasi in the omasum: r₂) were r₁ = 0.8008^(**) and Y^ = -0.872 + 0.030X, and r₂ = 0.7829^(**) and Y^ = 10.925 + 0.219X, respectively.

한국 재래유산양의 제1위와 제2위 형태의 상호관계에 관한 연구

하정기(J . K . Ha),황보종(J . Hwang - Bo) 한국축산학회 1993 한국축산학회지 Vol.35 No.2

This experiment was carried out to investigate the relationship of the morphological characteristics between rumen and reticulum of the Korean native young goats. Number of items investigated in rumen and reticulum in the experiment were 13 and 9, respectively. The results obtained are summarized as follows; 1. Number of correlation coefficient obtained among 13 items of rumen and 9 items of reticulum were 117, and correlation coefficients of 115 were significant (p$lt;0.05). Significance level of correlation coefficients were higher among measurement items on rumen and reticulum of young goats than mature of Korean native goats. The objectives of present study draw inference especially relationship more grows from birth to 150 days of age then mature Korean native goats on morphological characteristics of rumen and reticulum. 2. Correlation coefficients and regression equation between right and left rumen length(R.L.R.L) vs. reticulum area(r₁), and R.L.R.L. vs. upper and lower length of one polygon located at central part of reticulum(U.P.C.R:r₂) were r₁=0.9497(P$lt;0.0l) and Y=-15.737+4.754X, and r₂=0.9340(P$lt;0.01) and Y=0.794+0.339X, respectively. 3. Correlation coefficients and regression equation between upper and lower rumen length(U.L.R.L) vs. upper and lower reticulum length(U.L: r₁), and U.L.R.L. vs. reticulum area(r₂) were r₁=0.9366(P$lt;0.01) and Y= 0.730+0.256X, and r₂=0.9484(P$lt; 0.01) and Y=-11.936+4.730X, respectively. 4. Correlation coefficients and regression equation between rumen weight vs. reticulum weight were r=0.9851(P$lt;0.01) and Y=1.362+0.164X.

특별강연 및 학술연구 발표요지 : 제1분야: 잡초방제 ; Flucetosulfuron과 Metamifop 제초제가 처리된 벼에서의 단백질 발현량 변화 양상

김진석 ( J. S. Kim ),이증주 ( J. J. Lee ),하정기 ( J. K. Ha ),민석기 ( S. K. Min ),서보람 ( B. R. Seo ) 한국잡초학회 2006 한국잡초학회 별책(학술대회 초록집) Vol.26 No.2