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高解像度デジタルカメラを利用した新しい牛枝肉横断面撮影装置の開発 OAK
口田, 圭吾; 高橋, 健一郎; 長谷川, 未央; 堀, 武司; 本間, 稔規; 波, 通隆; 小高, 仁重; Kuchida, Keigo; Takahashi, Kenichiro; Hasegawa, Mio; Hori, Takeshi; Honma, Toshinori; Nami, Michitaka; Kotaka, Hitoshige.
高解像度デジタルカメラを利用した新たな牛枝肉横断面撮影装置を開発すること,ならびに開発された新型撮影装置と従来型の撮影装置の双方を用い,黒毛和種の枝肉横断面を撮影し,両装置から得られた脂肪交雑の評価値の比較を実施することを目的とした。330mmの装置の高さから,広範囲の画像を撮像するために, 35mm版のCCD素子を有するデジタルカメラを選定した。また,正像が確保できるレンズとして,画角114度の超広角レンズを採用した。さらに,遮光された僅体内部には,高輝度LEDが密に並んで実装されているl次元CCDカメラ用のライン 方式照明を2燈取り付けた。新型撮影装置ならびに従来型撮影装置から得られる画像を比較するために,黒毛和種去勢牛20頭の枝肉横断面を,双方の撮影装置で撮影し,画像解析により,脂肪交雑の特徴量を算出し,両者の比較を実施した。超広角レンズを使用したことにより,撮像範囲は384mmX318mmと,従来型に比較し,約2倍の面積を1回で撮影することが可能となった。ロース芯面積ならびに脂肪面積比について,両撮影装置の聞での相違は,大きいものでそれぞれ2c㎡,3%程度であった。また,新型撮影装置で明確に確認できる脂肪交雑粒子の最小面積 は0.004㎡程度であった。
Palavras-chave: 画像解析; デジタルカメラ; 脂肪交雑; 牛枝肉; Image analysis; Digital camera; Marbling; Beef carcass.
Ano: 2005 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1595
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Delayed carcass chilling improves tenderness of the beef gluteus medius muscle PAB
Pflanzer,Sérgio Bertelli; Gomes,Carolina Lugnani; Felício,Pedro Eduardo de.
Abstract: The objective of this work was to evaluate the effects of a slower chilling rate on the physical traits of 14-day aged top sirloin (gluteus medius) from F1 Angus x Nellore young bulls. Slight and lean beef carcasses (n = 30) were split in half and selected for control (2°C for 24 hours) and treatment (10°C for 10 hours followed by 2°C for 14 hours). Carcass temperature and pH decline were monitored in the longissimus dorsi (LD). Sarcomere length, color, and instrumental tenderness (Warner-Bratzler shear force and Volodkevich bite jaws) were measured on the gluteus medius (GM). pH 6.0 was reached when the LD temperature was very low, 3°C for the control and 6°C for the treatment. Differences in color and cooking losses were not significant. A...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef carcass; Chilling rates; Sarcomere length; Top sirloin; Volodkevich.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104300
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Digital-image analysis to predict weight and yields of boneless subprimal beef cuts Scientia Agricola
Teira,Gustavo Adolfo; Tinois,Eduardo; Lotufo,Roberto de Alencar; Felício,Pedro Eduardo de.
For several decades, beef carcass evaluation for grading or research purposes has relied upon subjective visual scores, and manually taken measurements, but in recent times there has been a growing interest in new technologies capable of improving accuracy of estimates. Equations to predict weight and yield of beef pistol subprimal cuts were developed in this work using digital image analysis (VIA) of the 12th rib steak. Equations to predict total pistol subprimal cuts weight (CUTS) had coefficients of determination (CD) of 0.84, or 0.87 to 0.88, when the independent variables were the VIA parameters and the half carcass weight (HC) or the total pistol weight (TP), respectively. The predicted values for the total seven subprimal cuts, as a percentage of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef industry; Beef carcass; Image analysis; Rib eye area; Fat thickness.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200028
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