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 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

FREE PAPAR ( ROOM 1 ) : A - 7 ; Leukocyte Histamine Release during Natural Menstrual Cycle and the Inhibition of Progesterone

( Y . Arai,T . Koshino,Y . Miyamoto,Y . Sano ) 대한천식 및 알레르기학회 ( 구 대한알레르기학회 ) 1991 한일합동심포지움 Vol.11 No.1

CAE를 이용한 CVT제어시스템의 개발

최윤용(Y. Y. Choi),이상현(S. H. Lee),정우진(W. J. Jung),사노 타카시(Takashi. Sano),카츠 푸유쿠(Fuyuku. Katsu),와타나베 토모하루(Tomoharu. Watanabe) 유공압건설기계학회 2010 유공압건설기계학회 학술대회논문집 Vol.2010 No.10

Efficient development process is desired in automobile industries to achieve quantitatively and qualitatively increasing requirements such as fuel economy, functional flexibility, comfort, safety, quality and cost. CAE has been regarded as a key technology to solve these issues. In this paper a method is presented to virtual model development of CVT control system in order to time reduction of Research and Development. The virtual model development enables an accelerated introduction of new CVT simulation technology to the market and will help the CVT to main its forefront position on transmission.

Long-Reach Coherent WDM PON Employing Self-Polarization-Stabilization Technique

Cho, K Y,Tanaka, K,Sano, T,Jung, S P,Chang, J H,Takushima, Y,Agata, A,Horiuchi, Y,Suzuki, M,Chung, Y C IEEE 2011 Journal of Lightwave Technology Vol.29 No.4

<P>We propose a simple self-polarization-stabilization technique for the wavelength-division-multiplexed passive optical network implemented with reflective semiconductor optical amplifiers (RSOAs) and self-homodyne coherent receivers. By placing a 45° Faraday rotator in front of the RSOA in the optical network unit, the state-of-polarization of the upstream signal becomes orthogonal to that of the linearly polarized seed light at the input of the coherent receiver regardless of the birefringence in the transmission link. Thus, we can achieve the polarization stability of the upstream signal at the input of the coherent receiver. We first implement a self-homodyne receiver by using the proposed self-polarization-stabilization technique and measure its sensitivity by using 2.5-Gb/s binary phase-shift keying signals in the laboratory. The result shows an excellent receiver sensitivity of -46.4 dBm. We also confirm the efficacy of the proposed technique in the transmission experiment over 68-km long link partially composed of installed (buried and aerial) fibers. No significant degradation in the receiver sensitivity is observed during the 10-h experiment despite the large polarization fluctuations occurred in these installed fibers.</P>

Tissue-Specific Expression in Opaque Endosperms of Rice

I. Miakami,H. Nagano,H. Y. Hirano,T. Inukai,Y. Kishima,Y. Sano 한국육종학회 1997 한국육종학회 학술발표회 발표요지 Vol.29 No.2

The competition number of a graph and the dimension of its hole space

Kim, S.R.,Lee, J.Y.,Park, B.,Sano, Y. Pergamon Press ; Elsevier Science Ltd 2012 APPLIED MATHEMATICS LETTERS Vol.25 No.3

The competition graph of a digraph D is a (simple undirected) graph which has the same vertex set as D and has an edge between x and y if and only if there exists a vertex v in D such that (x,v) and (y,v) are arcs of D. For any graph G, G together with sufficiently many isolated vertices is the competition graph of some acyclic digraph. The competition number k(G) of G is the smallest number of such isolated vertices. In general, it is hard to compute the competition number k(G) for a graph G and it has been one of the important research problems in the study of competition graphs to characterize a graph by its competition number. Recently, the relationship between the competition number and the number of holes of a graph has been studied. A hole of a graph is a cycle of length at least 4 as an induced subgraph. In this paper, we conjecture that the dimension of the hole space of a graph is not smaller than the competition number of the graph. We verify this conjecture for various kinds of graphs and show that our conjectured inequality is indeed an equality for connected triangle-free graphs.

DOES RESPONSE OF INSULIN SECRETION TO INTRARUMINAL AND INTRAVENOUS INFUSIONS OF PROPIONATE IN SHEEP

Sano, H.,Terashima, Y. Asian Australasian Association of Animal Productio 1989 Animal Bioscience Vol.2 No.3

DRASTIC IMPROVEMENT OF THERMAL EFFICIENCY BY RAPID PISTON-MOVEMENT NEAR TDC

Y. MORIYOSHI,M. SANO,K. MORIKAWA,M. KANEKO 한국자동차공학회 2006 International journal of automotive technology Vol.7 No.3

A new combustion method of high compression ratio SI engine was studied and proposed in order to achieve high thermal efficiency, comparable to that of CI engine. Compression ratio of SI engine is generally restricted by the knocking phenomena. A combustion chamber profile and a cranking mechanism were studied to avoid knocking with high compression ratio. Because reducing the end-gas temperature will suppress knocking, a combustion chamber was considered to have a wide surface at the end-gas region. However, wide surface will lead to large heat loss, which may cancel the gain of higher compression ratio operation. Thereby, a special cranking mechanism was adapted which allowed the piston to move rapidly near TDC. Numerical simulations were performed to optimize the cranking mechanism for achieving high thermal efficiency. An elliptic gear system and a leaf-shape gear system were employed in numerical simulations. Livengood-Wu integral, which is widely used to judge knocking occurrence, was calculated to verify the effect for the new concept. As a result, this concept can be operated at compression ratio of fourteen using a regular gasoline. A new single cylinder engine with compression ratio of twelve and TGV (Tumble Generation Valve) to enhance the turbulence and combustion speed was designed and built for proving its performance. The test results verified the predictions. Thermal efficiency was improve over 10% with compression ratio of twelve compared to an original engine with compression ratio of ten when strong turbulence was generated using TGV, leading to a fast combustion speed and reduced heat loss.

INSULIN RESPONSIVENESS TO GLUCOSE AND TISSUE RESPONSIVENESS TO INSULIN IN SOWS, SHEEP AND PIGS

Sano, H.,Terashima, Y. Asian Australasian Association of Animal Productio 1991 Animal Bioscience Vol.4 No.1

Insulin responsiveness to glucose and tissue responsiveness to insulin, using the hyperglycemic clamp and the hyperinsulinemic euglycemic clamp techniques, were compared among cows, sheep and pigs. The plasma insulin concentrations during the hyperglaycemic clamp period were highest (p < 0.05) in cows, followed by sheep and pigs. The glucose infusion rate in the hyperinsulinemic euglycemic clamp technique was greater (p < 0.01) in pigs than in cows and sheep. These results suggest responsiveness to insulin is higher in pigs than in cows and sheep.