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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 35 (1970), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Selected characteristics of 24 left pork loins representing 4 aging (chilling at 36°F) periods (1, 4, 8 and 12 days) were investigated. The loin was cut into 4 sections: al the 4th to 8th thoracic vertebra, b) the 8th to 12th thoracic vertebra. c) the 12th thoracic to the 1st lumbar vertebra and dl the 1st to 5th lumbar vertebra. 2, 1.5-in. chops were cut from the posterior end of each section and used for measurements on the cooked meat (cooking time and losses, palatability scores, shear value, water-holding capacity, total moisture, free fatty acids and pH). The remaining portion of the sections was used for measurements on the raw meat (total moisture. free fatty acids, pH, lactic acid, TBA, ether extract and free aminesl. Significant increases after 12 days’aging were noted in cooking time in min/lb (P 〈0.05), dripping cooking losses (P 〈 0.05), acid numbers for raw and cooked fat (P 〈 1.01), pH of raw (P 〈 0.05) and cooked (P 〈 0.01) muscle, TBA value of raw muscle (P 〈 0.05). tenderness score (P 〈 0.05) and free amines (P 〈0.01). Decreases (P 〈 0.05) were noted for percentage total moisture of raw muscle and shear values. Aging pork loin for 12 days had only a slight effect on palatability. Few significant changes were noted in the pork loins until after 4 days of aging. However, free amines in raw muscle and free fatty acids of cooked meat increased (P 〈 0.05) between 1 and 4 days of aging. Generally, aging was of little benefit.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 34 (1969), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: SUMMARY: A completely randomized design was followed to evaluate 48 roasts posterior third of the loin) from 12 Duroc and 12 Poland China barrows. Antemortem treatment of pigs produced “normal”, pale-soft-exudative (PSE) and dark-firm-dry (DFD) longissimus dorsi (LD) muscle. Meat was roasted at 350°F to an internal temperature of 167°F and evaluated by organoleptic and selected objective measurements. There was no significant organoleptic preference for one type (“normal”, PSE, DFD) of LD. Also, differences among types of muscle were not significant for roasting time, volume of press fluid or total moisture (press method); whereas roasting losses, total moisture (Brabender) and pH of LD were affected significantly by type of muscle. In general, there were significant (P 〈 0.05) differences between PSE and DFD muscle, and between “normal” and DFD muscle. DFD muscle exhibited the smallest roasting loss and greatest total moisture, whereas PSE muscle had the greatest roasting loss and least total moisture. DFD muscle rated highest in pH and lowest in Warner-Bratzler shear value. LD from Durocs was more tender (P 〈 0.05), had a higher (P 〈 0.05) pH, and contained less (P 〈 0.01) total moisture (Brabender) than LD from Poland Chinas. Cooking losses were greater (P 〈 0.05) for roasts from Durocs than for roasts from Poland Chinas.
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 38 (1973), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 37 (1972), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: SUMMARY— Selected characteristics of beef rib steaks representing three physiological maturity levels and two marbling levels were investigated. Paired steaks at the 1lth thoracic vertebra were used to obtain cooking time and losses, palatability scores, Warner-Bratzter shear values, and selected histological data. In addition, steaks from the left 7th and right 8th thoracic vertebrae positions were used to measure cooking time and losses, Warner-Bratzfer shear values, waterholding capacity, pH, color-difference, and total moisture. Ether extract was obtained for raw longissimus dorsi at the 12th thoracic vertebra. Maturity and marbling affected told moisture (P 〈 0.001), quantity of fat in raw muscle (histological measurement, P 〈 0.01). ether extract (P 〈 0.001). and dripping losses (7th and 8th thoracic vertebrae P 〈 0.001). Other factors were not affected significantly. Maturity and marbling, at levels represented, had little effect on palatability of the steaks, although generally, measurements for fat content were higher and those for moisture lower at the higher marbling level. Most correlation coefficients for overall acceptability and histological measurements were low. Tenderness had more influence on the overall acceptability of the meat than flavor or juiciness. Moderate to high relationships occurred between cooking time and both initial weight of steaks and cooking losses. Generally, waterholding capacity was not related to pH, total moisture, or cooking losses. Correlation coefficients for pH vs. shear value and pH vs. color-difference were low.
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  • 6
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Data from three experiments suggest that designs for studies using pork loin should consider variations within the loin from the 4th rib to the anterior end of the hip bone.' Of the factors measured on anterior, middle, and posterior sections in the loin, only tenderness and flavor of the LD were similar for all three sections in all three experiments. The middle section lost less weight during cooking, produced the most press fluid, and was the least tender in all experiments. The anterior section required significantly longer total cooking time than middle or posterior sections, whereas there was no factor in which the posterior section usually differed from the other two sections.
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 35 (1970), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Pieces of beef semimembranosus muscle, relatively uniform in weight and shape, were deep-fat fried (DF), oven-roasted (OR), oven-braised (OB) and pressure-braised (PB) at 10 psig to an internal temperature of 70°C to investigate he effects of dry and moist heat on selected characteristics of beef. Rate of heat penetration, cooking time, cooking losses, total moisture, press fluid, water-holding capacity and juiciness varied (P 〈 0.01) and apparent degree of doneness varied (P 〈 0.05) among the 4 heat treatments. Warner-Bratzler shear, color-difference, flavor, tenderness and over-all acceptability were not affected significantly by treatment. OR pieces had the slowest rate of heat penetration and the longest cooking time, highest values for total moisture, press fluid, water-holding capacity and juiciness. For those measurements, OB pieces always ranked next to OR pieces, followed by DF and PB pieces. OR pieces appeared less well-done than meat given the other treatments. For every heat treatment, there was an excellent relationship between rate of heat penetration and cooking time. For PB pieces, rate of heat penetration was moderately related to total moisture, press fluid, juiciness and apparent degree of doneness, and highly related to cooking losses. It appeared that tenderness and flavor influenced over-all acceptability scores more than juiciness or apparent degree of doneness. Differences between values for selected characteristics of raw muscle and of muscle subjected to each treatment were not significantly different from each other.
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