Bulgarian Journal of Agricultural Science
Array ( [session_started] => 1721052844 [LANGUAGE] => EN [LEPTON_SESSION] => 1 )


Forgot Details? Sign-up

Adaptation mechanisms of the pancreas enzyme system of calves after the introduction of ultrafine chromium particles into the ration
Svyatoslav V. Lebedev, Olga V. Kvan, Irina A. Gavrish, Elena V. Sheida and Ilmira Z. Gubaidullina
Abstract: An important tool in regulating chromium metabolism in the body is its ability to penetrate through the intestinal wall. It accelerates with a decrease in its size, and the presence of digestive agents (vitamins, phytates, aminoacids). Chromium has an excessively low digestibility and absorption of organic (25%) and inorganic (3%) forms, while the absorption of Cr+3 occurs mainly through the kidney Cr – 80 – 95%, with small losses in the hair, through the sebaceous gland and bile (45% Cr), indicating a rapid absorption and recreation of Cr. Regardless of increase in chromium in the diet (40-240 μg/day), the level of absorption remains constant 0.4 – 2%.
Thus, the factorial dependence of chromium absorption consists of the source, size and ingredient composition of diet and a decrease in the size of Cr particles will increase the rate of absorption of chromium in the body.
The highest activity of protease and lipase was established in the first hours of selection, followed by its decrease by 3 hours. Adding chromium to the diets of bulls stimulated protease activity during all record periods, the difference with control was from 25 to 43% (p ≤ 0.05). Characteristic is the enhancement of protease activity on the 2nd day of the experiment, followed by a decrease in its activity by 3 day. Similarly, lipase activity was formed; the difference with the control was 36% (p ≤ 0.05). On the contrary, amylase activity decreased at hourly sampling points and increased in daily sampling.
Keywords: amylase, pancreas; chromium; mineral nutrition; nanoparticles
Date published: 2021-02-25
Download full text