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Wpływ żywienia dietą bezbiałkową na skład chemiczny ciała szczurów w różnym wieku

100%

Beza R.

Zeszyty Problemowe Postępów Nauk Rolniczych

1989

tom 360

The experiments were carried out on 473 male Wistar rats in 13 groups, their age ranging from 23 to 264 days, and the individual initial body mass in fasting state from 37 to 430 gramms. Each group was divided into 6 subgroups of which the rats were killed at the start of the experiment (control) and after 3, 6, 9, 12 and 16 days of feeding on the protein-free diet (PFD ). The bodies were autoclaved, homogenized and analyzed for total nitrogen (N), moisture (W), ash (A) and diethyl ether extract (F). The results were analyzed statistically using the model of linear regression for logarithmic values. Each of the chemical components uas related to the protein-free periods (t = 0 - 16 days) and to the shrunk body mass (SB ). The results showed that the SB as well as the N and W contents decreased significantly (P ˂ 0.01) with t according to Y = AXᵇ , regardless of the age of rats (Tabl. 1). After 6 days SB decreased to about 90% and after 16 days to about 83%, N content to about 94 and 85%, and W content to about 89 and 80% of the initial values, respectively. The changes in F and A contents did not correlate significantly with t but tended to increase with prolonged t of PFD, especially in young animals up to 80 days old. The concentration of F in the body increased to 110, 111 and to 125% after 9, 12 and 16 days on PFD. While A increased in young animals up to 105, 105 and 104% of the initial values. Relationship between chemical components and SB of rats at different age after different periods of PFD-feeding could also be described with power functions (Tabl. 2). The results indicated that PFD influenced significantly the relationships investigated, independently of SB increasing with age but decreasing with duration of protein-free feeding. During PFD-feeding there was a decrease of N and W contents in the body and a deposition of F and A. The most reduced U content in the body may suggest dehydration of the organism.

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1 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Beza R.

1 1989

Wyniki wyszukiwania

Wpływ żywienia dietą bezbiałkową na skład chemiczny ciała szczurów w różnym wieku