论文部分内容阅读
机体的辐射反应能通过照前或照后的处理得以改善。能改善辐射反应的各种药剂按下列类型进行讨论。一,辐射防护剂(一)机体局部屏蔽局部屏蔽机体的任何部分在LD_(50)剂量范围能明显地减轻辐射损伤。屏蔽富于骨髓的部位有较高效果。未屏蔽大鼠LD_(50)值是600R;屏蔽腹部和胸部是900R;屏蔽头部是700R。在用X线进行全身照射期间用铅屏蔽经手术使位于体外的脾脏可使小鼠~(30)LD_(50)价值550R上升到1100R。(二)氧效应细胞间的氧张力显现不同。骨髓细胞氧张力很低
The body’s radiation response can be improved by pre and post-irradiation treatments. Various agents that improve radiation response are discussed below. First, the radiation protective agent (a) local body shield local shielding body any part of the LD_ (50) dose range can significantly reduce radiation damage. Shield rich bone marrow sites have a higher effect. The unshielded rat LD 50 value is 600R; the shield abdomen and chest are 900R; and the shielded head is 700R. In the whole body irradiation with X-ray lead shielding surgery in the spleen in vitro can make the mouse ~ (30) LD 50 value 550R increased to 1100R. (B) Oxygen effect The oxygen tension between cells appear different. Bone marrow oxygen tension is very low