摘要
本研究以大耳白家兔为实验动物,分别用含硒、锌水平不同的饲粮预饲2个月后,每组5只动物各灌喂1次75Se亚硒酸钠、65Zn硫酸锌溶液。测定了75Se、65Zn的吸收、排泄与转移到毛中沉积的过程,实验末检测了各器官组织中的存留量。从测定背部被毛中的放射性变化的结果表明,75Se、65Zn能较快的从体内转移到被毛中,动物处理后第7d和第5d在背部被毛的基段和上段都测得了75Se和65Zn,且放射性强度随时间而增加,开始基段毛放射性高于上段,而实验末,上段毛却高于基段。从不同时间测得的数据说明,转移到被毛中的微量元素存在由基部逐渐向上部扩展并积累于上部的特点,其分布是不均匀的。被毛中75Se、65Zn的含量与动物饲粮中硒、锌的含量有关,但不同的微量元素其含量有所不同。
In this study,the rabbit was used as experimental animal.After 2 months of feeding the diet with different levels of Se or Zn, five animals from each group were given an oral dose of Na\-275SeO\-3 or 65ZnSO\-4 solution,respectively.The process of absorption,exeretion,accumulation and transfer of istopes to the hair were determined,and the tissues retention of 75Se or 65Zn were also examined at the end of the experiments.The results obtained from the measurement of radioactive change of back hair in each group animal after the oral intake of 75Se or 65Zn showed that the 75Se or 65Zn transfer to hair were fast.At the seventh and fifth day after dosing,the 75Se or 65Zn were determined in the down\|end section and upper\|end section of back hair,and the radioactivity increased with time.At the first, the radioactivity in down\|end section was higher than that of the upper\|end section.However,at the end of experiment the upper\|end section was higher than the down\|end section.The data obtained from the different measuring point indicated that the accumulation,distribution of trace element in hair was not even,there was extended process from the down\|end to the upper\|end of hair and accumulation in upper\|end section.The content of 75Se or 65Zn in hair was related to the level of Se or Zn in diet.However,there were difference among the different trace elements.
出处
《核农学报》
CAS
CSCD
1999年第3期168-174,共7页
Journal of Nuclear Agricultural Sciences
基金
国家自然科学基金
关键词
同位素示踪
微量元素
沉积
锌
硒
兔毛
家兔
Se and 65Zn tracer technique
trace element
accumulation in hair