Hove K, Hansen H S
Department of Animal Science, Agricultural University of Norway, As.
Acta Vet Scand. 1993;34(3):287-97. doi: 10.1186/BF03548193.
A sustained release bolus with the cesium binder ammoniumiron(III)-hexacyanoferrate (AFCF) has been developed as a countermeasure for small ruminants grazing pastures contaminated by radiocesium (134Cs+137Cs). The boli (40-50 g) are produced by compression of a mixture of AFCF, barite and wax. The release of AFCF from boli labelled with 137Cs-iron-hexacyanoferrate complex was studied in laboratory sheep. The release rate followed first order kinetics during the 108 d of observation and decreased from 40 to 22, 110 to 35 and 280 to 25 mg d-1 in sheep treated with 1, 2 or 3 boli respectively. The efficiency of boli in reducing radiocesium transfer to meat and milk was tested in laboratory studies with goats fed 134Cs tracer. Until 40 d after treatment the transfer of radiocesium to milk was reduced by 35%, 60% and 85% in goats given 1, 2 or 3 boli, respectively. The reduction in radiocesium transfer persisted for 90 d but with a lower efficiency. A similar relationship was found between number of boli and the reduction in radiocesium transfer to meat with an observed maximal reduction of 60%.
已研发出一种含有铯结合剂六氰合铁酸铵铁（III）（AFCF）的缓释丸剂，作为小反刍动物在受放射性铯（134Cs + 137Cs）污染的牧场放牧时的一种应对措施。这些丸剂（40 - 50克）由AFCF、重晶石和蜡的混合物压制而成。在实验室绵羊中研究了用137Cs - 铁 - 六氰合铁酸配合物标记的丸剂中AFCF的释放情况。在108天的观察期内，释放速率遵循一级动力学，在用1、2或3个丸剂处理的绵羊中，释放速率分别从40降至22、110降至35和280降至25毫克/天。在用134Cs示踪剂喂养的山羊进行的实验室研究中，测试了丸剂在减少放射性铯向肉和奶中转移方面的效果。在处理后40天内，给予1、2或3个丸剂的山羊中，放射性铯向奶中的转移分别减少了35%、60%和85%。放射性铯转移的减少持续了90天，但效率较低。在丸剂数量与放射性铯向肉中转移的减少之间也发现了类似的关系，观察到的最大减少率为60%。
