So the researchers reckoned that if they mixed casein with the clay and added glyceraldehyde ( which substitutes for the poisonous formaldehyde used in the original plastic ) , they might be able to make something really rather useful .

所以研究者们认为，如果他们把酪蛋白和粘土混合到一起，加入甘油醛（替代在原先塑料中使用的有毒的甲醛），他们可能会制造出真正实用的东西。

Predict the effect on the net reaction catalyzed by glyceraldehyde 3-phosphate dehydrogenase if phosphate were replaced by arsenate .

预言:如果磷酸盐被砷酸盐取代,会对3-磷酸甘油醛脱氢酶催化的总反应产生何种影响。