Composition of Cooked Pork Chops: Effect of Removing Subcutaneous Fat Before Cooking

Novakofski, J.; Park, S.; Bechtel, Peter J.; McKeith, F. K.

doi:10.1111/j.1365-2621.1989.tb08556.x

Cited by 177 publications

(91 citation statements)

References 12 publications

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“…Ground samples were then dried to a constant weight in a 1108C oven. Lipid content was calculated by weight difference after extraction with 4 : 1 chloroform : methanol solution (Novakofski et al, 1989). Crude protein content (nitrogen 3 6.25) was determined by the combustion method (Association of Official Analytical Chemists (AOAC), 2000; method 990.03) with a Leco model FP2000 (Leco Corporation, St Joseph, MI, USA), using EDTA as an internal standard.…”

Section: Animals Observations and Materialsmentioning

confidence: 99%

The myostatin null mutation and clenbuterol administration elicit additive effects in mice

Dilger

Gabriel

Kutzler

et al. 2010

Animal

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In mice, the myostatin (Mstn) null mutation and treatment with clenbuterol both increase muscle growth and decrease fat mass. Our objective was to determine whether mechanistic overlap exists by administering clenbuterol to Mstn null mice. Male Mstn null and wild-type mice of similar genetic backgrounds received either 0 (control) or 20 p.p.m. clenbuterol in tap water free choice for 14 days. Several traits were measured to estimate muscle and fat growth. The Mstn null mutation resulted in increased body and empty carcass weight, increased muscle weights and decreased fat pad weights. Fat content was reduced and protein content was increased in the empty carcasses of Mstn null mice. Similarly, treatment with clenbuterol resulted in increased body and empty carcass weight, increased muscle weights and reduced fat pad weights. Fat content of empty carcasses and viscera was reduced and protein content of empty carcasses was increased with clenbuterol treatment. A significant interaction of genotype and clenbuterol treatment would indicate an altered responsiveness of Mstn null mice to clenbuterol. However, only the weight of gastrocnemius muscles exhibited a significant (P 5 0.01) interaction of genotype and clenbuterol treatment, indicating that Mstn null mice were less responsive to clenbuterol compared with wild-type mice. Thus, for all other traits, the impact of Mstn null mutation and clenbuterol treatment was completely additive. These data suggest that disruption of Mstn function does not alter the response of mice to b-adrenergic agonists.

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Section: Animals Observations and Materialsmentioning

confidence: 99%

The myostatin null mutation and clenbuterol administration elicit additive effects in mice

Dilger

Gabriel

Kutzler

et al. 2010

Animal

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“…Fat and water contents were determined on the homogenized longissimus chop and wholesale cut samples using the procedures described by Novakofski et al (1989). All samples were oven-dried (110°C for 24 to 48 h).…”

Section: Chemical Analysismentioning

confidence: 99%

Influence of sire line and halothane genotype on growth performance, carcass characteristics, and meat quality in pigs

Miller¹,

Ellis²,

McKeith³

et al. 2000

Can. J. Anim. Sci.

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. 2000. Influence of sire line and halothane genotype on growth performance, carcass characteristics and meat quality in pigs. Can. J. Anim. Sci. 80: 319-327. Progeny of three commercial sire lines mated to the same halothane negative crossbreed dam line were compared for growth, carcass and meat quality characteristics. Sire line A (halothane reactor) produced halothane carrier progeny; line C was halothane negative and produced negative progeny; line B (a cross between lines A and C) was a halothane carrier line that produced both carrier (BNn) and negative (BNN) progeny within the same litter. Line A pigs grew more slowly (P ≤ 0.05) and consumed less feed (P ≤ 0.05) than the progeny of the other lines (885, 1049, 1057 and 1082 g d -1 and 2.37, 2.82, 2.72 and 2.79 kg d -1 for lines a, BNN, BNn and C respectively). However, gain:feed was similar for all lines. Dressing percentage was similar for lines A, BNn and BNN (77.42, 77.62 and 77.00% respectively) but lower for line C (75.31%: P ≤ 0.05). Line differences for linear carcass measurements, lean cut yield and fat-free lean content were relatively small. Line A had higher shear force than the others (4.32, 3.21, 3.57, and 3.30 kg for A, BNN, BNn and C, respectively; P ≤ 0.05) and lines A and BNn had reduced taste panel tenderness and juiciness (P ≤ 0.05) compared with lines BNN and C. This study highlights commercially important differences between sire lines for pork quality traits. the variation in pork quality within this study resulted from the halothane gene and, potentially, other single genes that affect meat quality parameters.

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“…Percent ages of moisture and fat were performed in duplicate as described by Novakofski et al (1989). Briefly, samples were dried in a 110°C oven for at least 24 h and extract ed with an azeotropic mixture of chloroform:methanol to determine moisture and fat percentage.…”

Section: Proximate Analysismentioning

confidence: 99%

The effect of zilpaterol hydrochloride on meat quality of calf-fed Holstein steers

Holmer

Fernández-Dueñas

Scramlin

et al. 2009

Journal of Animal Science

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ABSTRACT:The objective of these studies was to evaluate the effects of zilpaterol hydrochloride (ZH), fed for 0, 20, or 30 d, on meat quality attributes of calffed Holstein steers. Steers were slaughtered at a com mercial facility, and carcasses were selected by HCW to represent the pen mean. Further carcass selection was based on quality grade (Choice and Select) and yield grade. Proximate composition, measures of water holding capacity, and tenderness using Warner-Bratzler shear force after 7, 14, or 21 d postmortem were evalu ated on the shoulder clod (triceps brachii), top butt (gluteus medius), and strip loin (longissimus lumbo rum). Percentage of purge for the 3 subprimals was not different (P > 0.05) among ZH treatments. Steers fed ZH for 20 d or 30 d had decreased (P < 0.05) percent ages of fat in the triceps brachii, compared with 0-d ZH. Percentage of fat was less (P < 0.05) in the gluteus medius and longissimus lumborum when steers were fed ZH for 30 d compared with those steers fed ZH for 0 d. Percentage of fat was greater in Choice triceps brachii (P < 0.05) and longissimus lumborum (P < 0.10) com pared with Select. Thaw loss was not different (P > 0.05) for any muscle due to ZH treatment. Only longis simus had a greater (P < 0.05) cooking loss with ZH treatment. Cooking loss was not different (P > 0.05) for the gluteus medius or longissimus lumborum due to quality grade or aging day. At each aging day, the 20-and 30-d ZH longissimus lumborum had greater (P < 0.05) shear force values than 0 d; however, 20-and 30-d ZH had a greater absolute change in shear force from 7 to 21 d than that of 0 d ZH. Triceps brachii steaks were less tender (P < 0.05) after ZH treatment, but gluteus medius steaks were not different (P > 0.05). There was no difference (P > 0.05) in shear force due to quality grade. Results illustrate the use of ZH in calffed Holstein steers will have minimal effects on purge, thaw, or cooking loss. Percentage of intramuscular fat will decrease, especially when fed for longer durations. Steaks from ZH treated steers were tougher than steaks from control animals at all aging times, but ZH steaks became more tender with postmortem aging.

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Composition of Cooked Pork Chops: Effect of Removing Subcutaneous Fat Before Cooking

Cited by 177 publications

References 12 publications

The myostatin null mutation and clenbuterol administration elicit additive effects in mice

The myostatin null mutation and clenbuterol administration elicit additive effects in mice

Influence of sire line and halothane genotype on growth performance, carcass characteristics, and meat quality in pigs

The effect of zilpaterol hydrochloride on meat quality of calf-fed Holstein steers

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