Résumé
This study was carried out to determine the effects of mild iron deficiency anemia (IDA) on physical work capacity (PWC) of 7-year-old children in Beijing. Ninety-three mild IDA children and thirty-seven well-to-do children served as volunteer subjects. Finger blood samples were obtained for Hb, FEP, FEP/Hb, SF determination; PWC data were assessed by measuring PWC 170, R.PWC170, Workload Heart Rates (W.HR), estimated Vo2max before, in the middle, and after treatment, respectively. After the mild IDA children were cured with iron supplement (300mg ferrous sulfate per day) for 60 days, their values of Hb, FEP, FEP/Hb, SF changed significantly from original 10.5g/dl, 41.8ng/dl, 4.6?g/g, 13.2ng/ml to 12.5g/dl, 24.1?g/dl, 2.0?g/g, 75.7ng/ml respectively (P
Résumé
The distributioa of Se in Hb and the effects of Se intake and its chemical forms oil the distribution were studied. The results showed that Se in human Hb was all located in globin and divided equally in a and ? chains. However, a part of Se could fall from Hb during the process of isolation when more Se as SeMet was taken and "excess" Se appeared in Hb. It was implicated that there were at least two kinds of linkage between Se and Hb --tight and loose.Regarding the components of amino acid in ? and ? chains, we assumed that a tight linkage between Se and Hb was in the form of SeMet, which was incorporated into Hb by dietary Se during the synthesis of Hb; the loose linkage was formed by a part of "excess" Se and CyS, especially No.93 CyS in ? chain, being unstable sclcnotrisulf ide or selenopersulfide, which broke easily by reduction during isolation. They might be utilized first by human body when Se was required.