在催化剂存在下,用双氧水氧化乙二醛溶液快速合成了乙醛酸.Glyoxylic acid was rapidly synthesized by catalytic oxidation of glyoxal with H 2 O 2.利用报废的液体推进剂硝酸-27S和乙醛制备乙二醛.Glyoxal is prepared with waste liquid propellant HNO 3 - 27 S and ethanal.乙二醛 、 乙...
边门两旁,是两株瘦小的苹果树那多节的桠枝.Two stunted apple trees raised their gnarled andbranchesside of the wicket gate.左边脊柱多节的赘生物是由退变性骨关节炎引起的.The knobby excrescences at the left side of this vertebral column are due to degenerative osteoa...
Conclusion The absorbable coral hydroxyapatite is a good bone tissue engineering scaffold.结论可吸收性珊瑚羟基磷灰石具有促进骨髓基质细胞表达成骨细胞表型、合成细胞外基质的功能,是良好的细胞载体.Results: The research of ureureteric stent developed in the absorbable and bio...
I used my thumbnail to tighten the screw on my lamp.我用拇指指甲把台灯上的螺钉拧紧了。Next, close your eyes then screw them up tight.接着,合上双眼,然后再用力闭紧。Screw down the lid fairly tightly.把盖子拧紧。...