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RISS 인기검색어
- 검색키워드
- 저자 : Muramoto T. (검색결과 6 건)
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Muramoto, T.,Higashiyama, M.,Kondo, T. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.9
The beef color stability during display of two muscles, m. longissimus thoracis and m. semitendinosus, of Japanese Shorthorn steers (n=14) was compared with that of Japanese Black steers (n=14). The beef color of each carcass was evaluated according to the Japanese Grading Standards at 24 h post mortem. Steak samples from muscles were over-wrapped with PVC film and displayed under fluorescent lights at $4^{\circ}C$ for 9 days. Metmyoglobin percentages of steak samples were determined at days 0, 3, 6 and 9. The overall grade of beef color of the carcasses of Japanese Shorthorn steers was significantly (p<0.05) lower than that of Japanese Black steers. The metmyoglobin percentages during the display of two muscles of Japanese Shorthorn steers were significantly (p<0.05) lower than those of Japanese Black steers. These results suggested that though beef color evaluation of the carcasses of Japanese Shorthorn steers was lower than that of Japanese Black steers, the beef color stability during the display of the muscle of Japanese Shorthorn steers was higher than that of Japanese Black steers.
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Muramoto, T.,Shibata, M.,Nakanishi, N. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.7
Relationships between muscle $\alpha$-tocopherol oncentrations and metmyoglobin percentages during display of six muscles, m. serratus ventralis (SV), m. psoas major (PM), m. gluteus medius (GM), m. semimembranosus (SM), m. semitendinosus (ST) and m. longissimus lumborum (LL), of Japanese Black steers slaughtered at 28 months of age were studied. Steers were supplemented with 0, 2,000 and 4,000 mg $\alpha$-tocopheryl acetate/head/day for 28 days prior to slaughter in the VE 0, the VE 2,000 and the VE 4,000 groups, respectively. $\alpha$-Tocopherol concentrations in PM, GM, SM, ST and LL of the VE 2,000 and the VE 4,000 groups were significantly (p<0.05) higher than those of the VE 0 group. There were no significant (p>0.05) differences in $\alpha$-tocopherol concentrations in all muscles between the VE 2,000 group and the VE 4,000 group. The muscle $\alpha$-tocopherol concentrations ($\ell$/g meat) which can retard metmyoglobin formation in muscles were estimated to be 5.3 for SV, 4.5 for PM, 4.2 for GM, 4.0 for SM, 3.6 for ST and 3.5 for LL. The equation to predict color-shelf-life of each muscle from the $\alpha$-tocopherol concentration in each muscle could be obtained.
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Effect of Pasture Finishing on Beef Quality of Japanese Shorthorn Steers
Muramoto, T.,Higashiyama, M.,Kondo, T. Asian Australasian Association of Animal Productio 2005 Animal Bioscience Vol.18 No.3
Effect of pasture finishing on $\alpha$-tocopherol and $\beta$-carotene concentrations, drip loss, cooking loss, Warner-Bratzler shear force, fatty acid composition, meat color and metmyoglobin percentage of m. longissimus thoracis of Japanese Shorthorn steers was studied. Japanese Shorthorn steers (n=8), fattened indoors with a concentrate-based diet until they were 19 months of age were divided into two groups of four steers. Steers of the concentrate-fed group were fattened indoors with a concentrate-based diet until they were slaughtered. Steers of the pasture-fed group were fattened on pasture until they were slaughtered. The $\alpha$-tocopherol and $\beta$-carotene concentrations in the muscle of the pasture-fed group were higher (p<0.05) than those of the concentrate-fed group. The drip loss of the muscle of the pasture-fed group was lower (p<0.05) than that of the concentrate-fed group. Compared with the concentrate-fed group, the concentration of peroxidisable lipids (fatty acids with three or more unsaturated bonds) in the muscle of the pasture-fed group was high (p<0.05). The metmyoglobin percentage during display of the muscle of the pasture-fed group was higher (p<0.05) than that of the concentrate-fed group. These results suggested that pasture finishing decreased drip loss of the beef but lowered meat color stability.
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Muramoto, T.,Shibata, M.,Nakanishi, N. Asian Australasian Association of Animal Productio 2003 Animal Bioscience Vol.16 No.9
Effect of slaughter age (24, 28 and 38 months of age) on beef color stability during display of m. serratus ventralis, m. psoas major, m. semitendinosus and m. longissimus thoracis from Japanese Black steers was studied. Steak samples from muscles were over-wrapped with PVC film and displayed under fluorescent lights at $4^{\circ}C$ for 12 days. Percentages of metmyoglobin of steak samples were determined at days 0, 3, 6, 9 and 12. The percentage of metmyoglobin of m. psoas major at day 3 of display in the 24 months group was lower (p<0.05) than that in the 38 months group. The percentage of metmyoglobin of m. semitendinosus at day 6 of display in the 38 months group was higher (p<0.05) than that in the other groups. The percentage of metmyoglobin of m. longissimus thoracis at day 3 of display in the 24 months group was lower (p<0.01) than that in the other groups. The percentage of metmyoglobin of m. longissimus thoracis at day 6 (p<0.01), 9 (p<0.01) and 12 (p<0.05) of display in the 38 months group were higher than those in the other groups. Crude fat concentration in m. longissimus thoracis increased (p<0.05) after 28 months of age. $\alpha$-Tocopherol concentration in m. serratus ventralis in the 38 months group was higher (p<0.001) than that in the other groups. In m. psoas major the $\alpha$-tocopherol concentration in the 38 months group was higher (p<0.05) than that in the 24 months group. The $\alpha$-tocopherol concentration in m. longissimus thoracis increased (p<0.001) with age. These results suggested that in spite of increase in both the crude fat and the $\alpha$-tocopherol concentrations in m. longissimus thoracis, the beef color stability during display became short with age.
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Shape classification of snow particle into snowflake and graupel using image processing
M. Kubo,K. Seto,K. Muramoto,Y. Fujiyoshi,T. Shinoda,T. Ohigashi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Classification of snowflakes is important in the investigation of the growth process of snow particles and radar meteorology, etc. This paper proposes an automatic image processing method for classification of falling snow particles. A side view of natural falling snow particles was photographed by IEEE1394 camera (1280 × 960 pixel) with a shutter speed of 1/10000 s. To obtain shape parameters, both a binary and a gray-level image of each particle were recorded continuously. Each particle was classified into a graupel or a snowflake by statistical classification procedure using image features. The proposed method has been successfully tested in snowfall, obtaining the percentages of snowflakes and graupels at 1 min interval.
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Visualization of water vapor distribution in the lower atmosphere using two lidars
M. Kubo,K. Nakamura,K. Muramoto,T. Ohigashi,T. Shinoda,Y.Fujiyoshi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Water vapor distribution in the lower atmosphere was observed using two optical lidars (ceilometer) set up at the distance of 3.1 km. Range height indicator (RHI) display was constructed from two time series data measured by each lidar. The instruments were also included small vertical radar and snowfall gauge. All the data were displayed on the same coordinate system to compare the profiles with time synchronization. To examine horizontal distribution of water vapor (cloud) widely, conventional weather radar was also used. Combination of all these instruments and methods will be potent system for understanding lower atmospheric structure.
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