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      • KCI우수등재

        고온환경에 있어서 면양의 제1위내 VFA 조성비율이 혈액성상(血液性狀) 및 혈액 산염기평형에 미치는 영향 : VFA - TG 인공영양사육법의 응용 Base Balance in Sheep Practical Application on the Intragastric Continuous Infusion of VFA - TG and Casein Solutions

        홍경선,정태영,좌야굉명,지하농낭,중도방야,안보계일 한국축산학회 1997 한국축산학회지 Vol.39 No.4

        This study was conducted to investigate the combined effects of VFA composition of rumen fluid and heat exposure on the blood constituents and acid-base balance in sheep. Each infusion group was subjected to either thermoneutral(20±2℃) or heat(30±2℃) environment for 4 days. Four adult Suffolk sheep fitted with a permanent ruminal cannula and a simple T-shaped duodenal cannula were used and infusion nutrients were examined by use of the continuous alimentation technique. A peristaltic pump was used to infuse the solutions of volatile fatty acid triglycerides(VFA-TG) consisting of 70 triacetin : 20 tripropionin : 10 tributyrin (low propionin division: LP) and 50 triacetin : 40 tripropionin : 10 tributyrin (high propionin division: HP) on the basis of energy and minerals into the rumen, and casein solution into the duodenum. The results obtained are summarized as follows: 1. Plasma glucose and insulin concentrations almost remained unchanged by the temperature treatment and the levels of VFA-TG solutions(LP and HP). Plasma lactate concentration increased(P$lt;0.05) during the heat exposure at the HP division, but was not affected by the levels of VFA-TG solutions. Plasma TG concentration increased(P$lt;0.01) during the heat exposure at the LP division probably due to the days of VFA-TG infusion rather than the heat stress. Plasma urine-N concentration tended to be higher under the heat exposure and increased in the HP than LP division. 2. During the heat exposure at the LP division, blood HCO₃-concentration almost did not exhibit clear changes, but blood Pco₂ tended to be decreased and blood pH tended to be increased (condition of respiratory alkalosis), and blood base excess concentration tended to be higher. 3. Blood Hb concentration tended to be lower in the LP division but remained unchanged by the temperature treatment in the HP division and was not affected by the levels of VFA-TG solutions. 4. Blood Na^+ concentration tended to be lower under the heat environment than the thermoneutral environment. Blood K^+ concentration remained unchanged by temperature and the levels of VFA-TG solutions. Blood Ca^(2+) concentration

      • KCI우수등재

        저온환경에 있어서 VFA - TG 인공영양사육 면양의 제1위내 VFA 조성비율이 일반임상소견 및 제1위액성상에 미치는 영향

        홍경선,정태영,좌야굉명,중도방야,지하농랑,안보가일 한국축산학회 1997 한국축산학회지 Vol.39 No.5

        This study was conducted to investigate the combined effects of VFA composition of rumen fluid and cold exposure on the general clinical view and ruminal fermentation characteristics in sheep. Each infusion group was subjected to either thermoneutral (20±2 ℃) or cold environment (2±2℃) for 4 days. The total infusate of nutrients was examined in sheep via the technique of continuous alimentation. Four adult Suffolk sheep fitted with a permanent ruminal cannula and a simple T-shaped duodenal cannula were used. A peristaltic pump was used to infuse the solutions of volatile fatty acid triglycerides (VFA-TG, triacetin: tripropionin: tributyrin) consisting of 70:20:10 (low propionin division: LP) and 50:40:10 (high propionin division: HP) on the basis of energy and minerals into the rumen, and casein solution into the duodenum. The results obtained are summarized as follows: 1. During the cold exposure (latter half of the infusion period), respiration rate decreased (P$lt;0.10), but heart rate tended to increase in the thermoneutral environment. And respiration rate had no significant difference between the levels of VFA-TG solutions (LP and HP division), but heart rate was higher in the HP division than in the LP division (P$lt;0.10). 2. In the HP division, rectal temperature was lower (P$lt;0.001) in the cold exposure than in the thermoneutral environment, but remained unchanged by the temperature treatment in the LP division. During the thermoneutral environment, rectal temperature was higher in the HP division than in the LP division (P$lt;0.01), but remained unchanged by the levels of VFA-TG solutions in the cold exposure. 3. Urine pH values maintained the value of the thermoneutral environment during the latter half of the infusion period, and was lower (P$lt;0.05) in the HP division than in the LP division. 4. Ruminal total volatile fatty acid (VFA) concentration tended to increase in the cold exposure compared to that in the thermoneutral environment, and did not affect with the levels of VFA-TG solutions. 5. In the LP division, molar percent of acetate was higher (P$lt;0.10), but molar percent of propionate was lower (P$lt;0.05) in the cold exposure than in the thermoneutral environment. As a result, the ratio of acetate to propionate (A:P ratio) increased more (P$lt;0.10) in the cold exposure than in the thermoneutral environment. In the HP division, molar percents of acetate, propionate and butyrate were not affected by the temperature treatments. The results showed that the A:P ratio was not affected by the environmental temperature treatments. However the ratio was increased in the LP division than in the HP division (P$lt;0.001). 6. Ruminal pH values was not affected by the temperature treatments, but was higher (P$lt;0.001) in the LP division than in the HP division. And ruminal pH values tended to be higher in the HP division than in the LP division. 7. Infusion of VFA-TG into the rumen caused a marked increase (P$lt;0.01) in ruminal TG concentration during the cold exposure (latter half of the infusion period), but it was not affected by the levels of VFA-TG solutions.

      • 고온환경에 있어서 면양의 제일위내 VFA 조성비율이 일반임상소견 및 Insulin 분필반응에 미치는 영향 - VFA-TG 인공영양사육법의 응용 -

        홍경선,정태영,좌야굉명,지하농랑,중와방야,안보계일 한국축산시설환경학회 1997 축산시설환경학회지 Vol.3 No.1

        This study was conducted to investigate the combined effects of VFA composition of rumen fluid and heat exposure (30${\pm}$2$^{\circ}C$) on the general clinical view and insulin secretory response to glucose in sheep. The total infusion of nutrients was examined in sheep via the technique of continuous alimentation. Four adult Suffolk sheep fitted with a permanent ruminal cannula and a simple T-shaped duodenal cannula were used. A peristaltic pump was used to infuse the solutions of volatile fatty acid triglycerides (VFA-TG) consisting of 70 triacetin : 20 tripropionin : 10 tributyrin (low propionin division: LP) and 50 triacetin : 40 tripropionin : 10 tributyrin (high propionin division: HP) on the basis of energy and minerals into the rumen, and casein solution into the duodenum. The effects of heat exposure and type of the levels of VFA-TG solutions on the insulin secretory response to glucose in sheep were investigated by using hyperglycemic clamp (HGC) technique. The results obtained are summarized as follows: 1. During the heat exposure (latter half of the infusion period), respiration rate, heart rate and rectal temperature increased (P<0.01, P<0.01, P<0.05), but the levels of VFA-TG solutions (LP and HP division) did not affect the general clinical view except for the heart rate. 2. In the HGC technique, glucose infusion rate (GIR) and mean plasma insulin increments (MPII) tended to be ower in the heat exposure than in the thermoneutral environment, but no significant difference was found among the treatments. GIR and MPII remained unchanged between the levels of VFA-TG solutions. 3. In the HGC technique, ratio of MPII to GIR (MPII/GIR) which represents pancreatic ${\beta}$-cell response to glucose stimulation remained unchanged among the treatments.

      • 고온환경에 있어서 양의 반추위내 VFA 조성비율이 반추위액성장 및 외인성 INSULIN 에 대한 조직의 반응에 미치는 영향 : VFA - TG 인공영양사육법의 응용 Practical Application on the Intragastric Continuous Infusion of VFA - TG and Cas

        정태영,홍경선,좌야굉명,지하용랑,중명방지,안보가 한국영양사료학회 1997 韓國營養飼料學會誌 Vol.21 No.3

        본 연구는 常溫환경(20±2℃)에 비하여 高溫 환경(30±2℃)에서 면양의 반추위내용액의 각종 성상 및 혈액 중 glucose 代謝動熊가 각 VFA의 공급 비율의 차이에 의하여 어떠한 영향을 받는지를 명확히 규명하기 위하여 실시하였다. 또한 VFA-triglyceride 혼합액 (VFA-TG)과 casein 용액을 이용한 새로운 인공영양사육법을 도입한 본 연구에서는, 체중과 연령이 비슷한 면양(Suffolk종) 4두를 선발하여 반추위 fistular와 십이지장 cannula(T자형)를 裝着시킨 후에 공시축으로 이용하였다. 한편, 10% VFA-TG 용액은 조사료 多給 조건 및 농후사료 多給조건의 반추위내 VFA 조성비율과 비슷한 비율(triacetin:tripropionin:tributyrin=70:20:10 및 50:40:10)로 혼합조제하여 반추위 fistular을 통하여 연속 주입하였으며, 10% casein 용액은 십이지장 cannula를 통하여 연속 주입하였다. 연구결과를 요약하면 다음과 같다. 1. 반추위내 총 VFA 농도는 常溫환경에 비하여 高溫환경에서 증가하는 경향을 보였으나, VFA-TG 혼합액의 조성비율에 의한 차이는 인정되지 않았다. 2. 반추위내 各 VFA의 mole 비율은 常溫환경에 비하여 高溫환경에서 초산의 비율이 증가하고(p$lt;0.01), 프로피온산 및 낙산의 비율은 저하 하였다 (P$lt;0.01, p $lt;0.05). 그 결과, A/P 비율은 常溫 환경에 비하여 高溫환경에서 유의적으로 증가하였으며 (p$lt;0.01), VFA-TG 혼합액의 조성비율에 의한 차이가 인정되어 HP(高propionin)구 보다 LF(低propionin)구에서 유의적으로 높게 나타났다(p$lt;0.01). 3. 반추위내 TG농도는 두 시험구 (LP구, HP구) 모두에서 VFA-TG 용액의 주입개시와 동시에 상승하여 인공영양기 후반부(高溫환경)에는 높은 값을 유지하였으며, 같은 기간중의 반추위내 pH 값은 두 시험구 모두 인공영양기 전반부(常溫환경)에 비하여 약간 감소하였다. 4. EGC 시험 결과, 外因性 insulin에 대한 末梢組織의 반응(생체 전체의 glucose 代謝에 대한 insulin 작용)은 영양조건보다는 환경온도조건에 의하여 다소 영향을 받는 것으로 나타났다. 즉, 常溫환경에 비하여 高溫환경에 다소 증가하는 경향으로 나타났다. This study was conducted to investigate the combined effects of VFA composition of rumen fluid and heat exposure (30±2℃) on the rumen fermentation characteristics and dynamic aspect of blood glucose metabolism in sheep. The total infusion of nutrients was examined in sheep via the technique of continuous alimentation. Four adult Suffolk sheep fitted with a permanent ruminal cannula and a simple T-shaped duodenal cannula were used. A peristaltic pump was used to infuse solutions of volatile fatty acid triglycerides (VFA-TG, triacetin: tripropionin: tributyrin) consisting of 70:20:10 (low propionin division: LP) and 50:40:10 (high propionin division: HP) on the basis of energy and minerals into the rumen, and casein solution into the duodenum. The results obtained are summarized as follows: 1. Ruminal total volatile fatty acid (VFA) concentration tended to be higher in the heat exposure than in the thermoneutral environment, but had no significant difference between the levels of VFA-TG solutions (LP and HP division). 2. Molar percent of acetate was higher (P$lt;0.01), and molar percent of propionate and butyrate were lower (P$lt;0.01, P$lt;0.05) in the heat exposure than in the thermoneutral environment. The results indicated that the ratio of acetate to propionate (A: P ratio) increased (P$lt;0.01) in the heat exposure than in the thermoneutral environment, and in the LP division than in the HP division (P$lt;0.01). 3. Infusion of VFA-TG into the rumen caused a marked increase in ruminal TG concentration and a slight decline in ruminal pH values during the heat exposure (latter half of the infusion period). 4. In the hyperinsulinemic euglycemic clamp (EGC) technique, the responsiveness of peripheral tissues to insulin were slightly higher in the heat exposure than in the thermoneutral environment, but had no significant difference between the levels of VFA-TG solutions.

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