Cysteamine(Mercaptoethylamine, MEA), S-2-Aminoethyl isothionronium Bromide HBr(AET) 및 S-2(2-Aminoethyl) Dihydrogen phosphorothioate(WR-638)들을 합성(合成)하고 이들 각각(各各) 또는 그들의 혼합물(混合物)의 $^{60}Co$ ${gamma}$-선(線) 방사선(放射線)에 대(對)한 장해방호효과(障害防護效果)를 ICR생쥐를 사용(使用)하여 검토(檢討)하였다. 조사전(照射前) 15분(分)에 복강내(腹腔內)에 약제(藥劑)를 투여(投與)하고 그 효과(效果)를 검토(檢討)한바 MEA, AET 및 그들 혼합물(混合物)에 있어서는 약독작용(藥毒作用)이 관찰(觀察)되었으나 WR-638 및 AET와의 혼합물(混合物)에서는 약독작용(藥毒作用)이 경미(輕微)하거나 또는 거의 없었다. 시험(試驗)한 각각(各各)의 화합물(化合物) 및 그 혼합물(混合物)들은 $^{60}Co$ $gamma$-선(線) 방사선(放射線)에 대(對)한 방호효과(防護效果)를 나타냈으며 AET와 WR-638의 혼합물(混合物)에 있어서는 부가(附加)된 방사선(放射線) 방호효과(防護效果)가 관찰(觀察)되었다.
Cysteamine(Mercaptoethyiamine, MEA), S,2-Aminoethylisothiouronium Bromide. HBr (AET), and S-(2-Aminoethyl) Dihydrogen Phosphorothioate (WR-638) were prepared and radioprotective effects of these chemicals and their combinations against $^{60}Co$ ${gamma}-ray$ radiation were studied ,in irradiated ICR mice. Intraperitonially administered chemicals or their combinations resulted drug deaths in cases of MEA, AET, and their combinations, whereas there were a slight or no drug death in cases of WR-638 and the combination of AET with WR-638. All tested chemicals and their combinations yielded radioprotective effects against $^{60}Co$ $gamma-ray$ radiation. An additive radioprotection effect was observed in case of the combination of AET with WR-638.
