Effects of Body Weight on Postmortem Temperature Plateau and Cooling Rate in Domestic Pigs
The effects of body weight on the plateau period and cooling rate of postmortem temperature were studied through the continuous minutely observation of the cadaver temperature of domestic pigs with different weights,which provided important information for improving the method of estimation of postmortem intervals based on initial reaction kinetics.Fifteen domestic pigs were divided into three experimental groups of 10,20 and 30 kg with 5 pigs in each group.The pigs were sacrificed by intracardiac injection of 10％potassium chloride solution.The carcasses were placed at 15 ℃ and rectal temperature was automatically measured every minute for 24 hours.The cadaver temperature of domestic pigs was collected at 2 and 24 h.The effects of body weight on cadaver temperature plateau and cadaver cooling rate constant were statistically analyzed by one-way ANOVA.The results showed that under the ambient temperature conditions,the average postmortem plateau time of 10kg,20 kg and 30 kg pigs was 43,29 and 52 min respectively,with no significant difference between groups(F=3.2,P＞0.05).The average cooling rate of 10,20 and 30 kg group were 0.1052,0.0939 and 0.0818 respectively,showing significant differences between groups(F=28.2,P＜0.05).The experiment confirmed that the cadaver temperature cooling rate decreased continually and gradually along with the increase of body weight in a negative correlation pattern.Meanwhile,the cadaver temperature plateau did not prolong correspondingly with the increase of body weight.
万方数据
维普
