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李玧庚,更科孝夫,宇塚雄次,田口淸,金德煥 충남대학교 수의과대학 동물의과학연구소 1997 動物醫科學硏究誌 Vol.5 No.-
The relationship between histological findings of fatty liver and blood composition was investigated using liver biopsy materials and blood obtained under and after operation of 38 Holstein-Friesian cows with abomasal displacement. The results were summarized as follows: The cows with more than 40% fat in the liver were 36.8%(14/38, Ⅲ group), those with 20-40% fat in that were 34.2%(13/38, Ⅱ group) and those with 0-20% fat in that were 28.9%(11/38, Ⅰ group), respectively. The age, body weight and body condition score of Ⅱ and Ⅲ group were higher than those of Ⅰ group. Consequently, high-yielding and fat cows were thought to be connected with the formation of present fatty liver. The levels of serum NEFA of 3 groups at the time of operation tended to be higher than those at 2 weeks after operation, and those levels of Ⅱ and Ⅲ group were significantly higher than those of Ⅰ group. The levels of serum total cholesterol and serum phospholipid of Ⅱ and Ⅲ group at the time of operation tended to be lower than those of Ⅰ group, and the levels of serum phospholipid of 3 groups at the time of operation tended to be lower than those at 2 weeks after operation. Consequently, those results suggested the presence of the lipid synthetic disturbance in liver by present fatty liver. The levels of LDL and VLDL of 3 groups at the time of operation tended to be lower than those at 2 weeks after operation. This results suggested the presence of the synthetic disturbance of lipoprotein in liver by present fatty liver. The levels of serum AST. γ-GTP and total bilirubin of 3 groups were significantly higher than those at 2 weeks after operation, and those levels of Ⅲ group tended to be higher than those of Ⅰ and Ⅱ group. This results suggested the presence of the disturbance of hepatic in present cows with fatty liver such as the fat degeneration of hepatocyte and disturbance of bile excretion in liver. The levels of serum thyroxin(T4) and serum triiodothyronine(T3) of 3 groups at the time of operation tended to be lower than those at 2 weeks after operation, and levels of Ⅲ group tended to be lower than those of Ⅰ and Ⅱ group. This results suggested the presence of hypothyroidism by fat in the cows with present fatty liver. From the results described above, since the fatty livers were found frequently in the case with abomasal displacement, it was suggested that the disturbance of hepatic function by fatty liver markedly influenced for development of the abomasal displacement and the abomasal displacement was thought to develope the fatty liver.
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Shinji ODA,Koichi SUZUMORI,Kazuo UZUKA,Isao ENOMOTO 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.1
This article describes the improvement of a pneumatic nutation motor. Pneumatic nutation motors that are driven by diaphragm are expected to have bigger torque. In this report, refined design of the diaphragm is discussed. First, several different shapes of diaphragms are proposed and analyzed with nonlinear FEM. Second, a “bellows type” diaphragm is fabricated and built in the motor. Holding fixture for the diaphragm is also refined to improve its performance. Finally, torques of the new model and conventional model are compared,resulting in that the new model generates the torque 20 percent higher than that of the conventional model at any air pressure.
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Mori, F.,Sawada, K.,Watanabe, K.,Ducusin, R.J.T.,Kumase, N.,Tanabe, S.,Uzuka, Y.,Takahashi, J.,Sarashina, T. Asian Australasian Association of Animal Productio 2001 Animal Bioscience Vol.14 No.1
In order to investigate the relationship between the incidence of displaced abomasum and feeding, the actual feeding practices and chemical compositions of roughage were examined in 2 kinds of farms at Tokachi district in Hokkaido. Examination of animal health records revealed that the annual milk yield per cow in high incidence (H-DA) farms was significantly higher than that in low incidence (L-DA) farms. The amount of concentrates fed in H-DA farms tended to be higher than that in L-DA farms during lactation. Compared to L-DA farms, the amount of juicy roughage (corn silage and grass silage) and dry roughage (hay, hay cube and roll wrap silage) during lactation in H-DA farms tended to be higher and lower, respectively. Moreover, the amount of roughage and the ratio of roughage to concentrates in H-DA farms tended to be lower than in L-DA farms. The survey indicated that displaced abomasum was associated with insufficient feeding of dietary fiber and overfeeding of concentrates.
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