4.4. Arsenic metabolism
The daily As intake was significantly higher in group T2 and T3 as compared to control group, obviously because 60 ppm As was added in the diet of the animals of these groups. The faecal and urinary As output were found to be positively correlated with the As intake as these were significantly higher in both the As exposed groups than the control kids with no significant difference between groups T2 and T3. It indicated that supplementation of 250 IU vitamin E per kg diet had no effect on the metabolism of As, its excretion as well as retention in the body. Further absorption of As was significantly higher in the As exposed kids as compared to control group. Lowered absorption of As in the control group may be due to the fact that As present in the feed is in the bound and organic form, which is well known to have relatively low bio-availability compared to water soluble inorganic As compounds, which have 90–100 per cent absorption (Mishra et al., 2004; Rees et al., 2009).Ghosh et al. (2013) also observed that major portion of As present in the paddy straw was eliminated directly through thefaeces in the cows.It was further observed that most of the supplemental As was not only absorbed, but was retained in the body of theanimals, as only a very small portion of it was excreted out. Though urine is the major route of excretion of natural arsenic
4.4. Arsenic metabolismThe daily As intake was significantly higher in group T2 and T3 as compared to control group, obviously because 60 ppm As was added in the diet of the animals of these groups. The faecal and urinary As output were found to be positively correlated with the As intake as these were significantly higher in both the As exposed groups than the control kids with no significant difference between groups T2 and T3. It indicated that supplementation of 250 IU vitamin E per kg diet had no effect on the metabolism of As, its excretion as well as retention in the body. Further absorption of As was significantly higher in the As exposed kids as compared to control group. Lowered absorption of As in the control group may be due to the fact that As present in the feed is in the bound and organic form, which is well known to have relatively low bio-availability compared to water soluble inorganic As compounds, which have 90–100 per cent absorption (Mishra et al., 2004; Rees et al., 2009).Ghosh et al. (2013) also observed that major portion of As present in the paddy straw was eliminated directly through thefaeces in the cows.It was further observed that most of the supplemental As was not only absorbed, but was retained in the body of theanimals, as only a very small portion of it was excreted out. Though urine is the major route of excretion of natural arsenic
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