Evaluation of growth and reproduction of CL Long Evans rats / 第三军医大学学报

Objective To study the growth and development as well as reproductive capacity of CL Long Evans rats. Methods Eighty CL Long Evans rats(80 days old)were bred in a barrier system. A monogamous mating system is used to reproduce 5 litters. Their main indexes of growth and reproduction were determined. The body weight gain of 60 second litter rats were analyzed from day 20 to 100. Results The number and weight of the fetus, the weaning time weight per cote and per litter in the second litter were the highest, and the fifth litter was the lowest. The growth and development curve was the same as that announced by Taconic. Conclusion Long Evans rats have been confirmed suitable for continual reproduction for 4 litters and the second litter is the best one for mating.

Effects and significance of essential fatty acids on contents of eicosapentaenoic acid and docosahexaenoic acid in rat brain tissues / 第三军医大学学报

Objective To investigate the effects of essential fatty acids(EFA)on the contents of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in the brain tissues of rats. Methods A total of 30 neonatal rats, 1 month old, were randomly divided into normal, EFA deficiency and fish oil supplement groups and given different feeding stuff for 3 months respectively. The contents of EPA and DHA in brain tissues were determined by high performance liquid chromatography (HPLC). Results As compared with normal group, the contents of EPA and DHA in EFA deficient group were significantly decreased(P