Field data on behaviour of artificial polydisperse radioactive silica particles in the components of the cattle food chain are presented. The model fused radioactive particles reproduced the spherical shape of particles in the local deposition during nuclear tests, including their specific gravity and polydispersity. It is shown that the composition of radioactive particles entering the body of animals differs from those initially deposited on the surface of pasture grass. The intake of particles into the body of animals decreased with increasing particle size. The intake for particles of 400-800 μm was about 10 times lower than that for fine particles sized 0-100 μm. It was found that the excretion rate of radioactive particles from the animal body also depends on particle size. The deposition of radioactive particles on the fundal surface of the wall of the ventral rumen sac and reticulum, as well as the long-term retention of radioactive particles of all sizes in the abomasum was noted. This can result in substantial damage in the GIT system, in particular, in these parts of the cattle digestive tract the focal ulcerative lesions of the mucous membrane can be formed by « hot » radioactive particles.

中文翻译：

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放射性粒子的环境行为：转移至动物。

给出了关于牛食链各成分中人工多分散性放射性二氧化硅颗粒行为的现场数据。模型融合的放射性粒子在核试验过程中在局部沉积中再现了粒子的球形，包括它们的比重和多分散性。结果表明，进入动物体内的放射性粒子的组成与最初沉积在牧场草表面的放射性粒子的组成不同。随着颗粒尺寸的增加，动物体内的颗粒摄入量减少。400-800μm颗粒的摄入量比尺寸为0-100μm的细颗粒的摄入量低约10倍。已经发现，放射性颗粒从动物体内的排泄速率还取决于颗粒大小。注意到放射性颗粒沉积在腹腔瘤胃壁和网状膜壁的底表面上，以及各种大小的放射性颗粒长期滞留在厌氧菌中。这可能会导致GIT系统严重受损，特别是在牛消化道的这些部位，粘膜的局部溃疡性病变可能是由“热”放射性颗粒形成的。