[目的]对比分析烟叶单层厚度和层积厚度测定方法,为卷烟工业合理选用烟叶原料并进行适宜的工艺处理提供依据.[方法]对单层厚度和层积厚度作了定义,按照定义的试验方法,对云南烟叶K326品种的中部叶作了单层厚度和层积厚度的测定,并对2个处理的数据进行了分析.[结果]层积厚度处理的变异系数比单层厚度处理的小,说明用层积厚度的方法来测定烟叶的厚度比/单层厚度测定方法更加稳定和可靠;对单层厚度法和层积厚度法的测定结果作配对样本t检验,结果显示P>0.05,表明2个方法差异不显著,因此用层积厚度来表征烟叶的厚度指标更加稳定.[结论]该研究可为以后烟叶厚度的测定提供新的可靠的方法.%[ Objective ] The aim was to study the effects of total extract of Dactyicapnos scandens Hutch on the naloxone-precipitated withdrawal syndrome in morphine dependent mice. [ Method] Mice were given increasing doses of morphine to produce a physical dependence. Then the withdrawal syndrome precipitated by naloxone was observed 40 min after total extract Dactyicapnos scandens Hutch were given. [ Result] At the dose of 150, 300 and 600 mg/kg, total extract Dactyicapnos scandens Hutch reduced jumping of mice ( P < 0.05 ) , significantly inhibited writhing of mice ( P < 0.01) and inhibited body weight loss of mice ( P < 0.05 ) while the 300 and 600 mg/kg dose had significant inhibition ( P < 0.01). At the dose of 150 and 300 mg/kg, total extracts reduced scratch face action of mice ( P < 0.05). The moderate do9e group had significant outcome (P <0.01). However, the dose of 600 mg/kg could not inhibit scratch face action compare with natural withdrawal team. [Conclusion] Total extract of Dactyicapnos scandens could significantly inhibit withdrawal syndrome in morphine dependent mice.
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