ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Concentrations of phosphocreatine (PC), adenosine triphosphate (ATP) and lactic acid were determined in longissimus muscle from 7 “stress-resistant” Chester White pigs and 8 “stress-susceptible” Poland China pigs at several intervals during the loss of extensibility postmortem. Calcium-binding ability of the sarcoplasmic reticulum and postmortem tension development of longissimus muscle also ware determined. Loss of extensibility was completed sooner in longissimus muscle from stress-susceptible pigs than from stress-resistant pigs. For the most part, longissimus muscle samples from stress-susceptible pigs had lower (P 〈.05) levels of PC and ATP and higher (P 〈 .05) levels of lactic acid at identical stages of change in extensibility than did samples from stress-resistant pigs. At identical stages of change in extensibility in “fast” and “slow-glycolyzing” muscles, there were no significant differences in the ability of the sarcoplasmic reticulum preparations to bind calcium or in the muscle's ability to develop isometric tension.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1970.tb04813.x
Permalink