以开链的羟基醛和羟基酮形式存在的单糖非常活泼。
As open-chain hydroxy aldehydes and hydroxyl ketenes, the monosaccharides are very reactive.
单糖本质上是脂族的多羟基醛和酮，即HOCH2- (CHOH) 2 -CHO和HOCH 2 - (CHOH) n - 1 - C： O - CH 2 OH，分别称为醛糖和酮糖。
The simple sugars monosaccharides0 are basically aliphatic polyhydroxy aldehydes and ketones: HOCH2 - CHOH n-CHO and HOCH2 - CHOOH n-1-C-O-Ch2OH, called "aldoses" and "ketoses," respectively.
这些化合物能溶于水，并含有游离的半缩醛羟基，所以在碱溶液中能还原银离子和铜离子。
These compounds are soluble in water, and contains the hemiacetal hydroxyl free, so in alkaline solution can reduce silver ions and copper ions.
碳水化合物碳水化合物通常的定义是多羟基的醛和酮或者水解产生多羟基的醛和酮的物质。
Carbohydrates carbohydrates are usually defined as polyhydroxy aldehydes and ketones or substances that hydrolyze to yield polyhydroxy aldehydes and ketones.
探讨了合成羟基香茅醛的反应条件。
The reaction conditions of synthesizing hydroxycitronellal have been explored.
从香茅油出发合成了羟基香茅醛。
The hydroxycitronellal has been synthesized from citronella oil.
缩合物的酸催化水合后的水解反应在保护剂存在下进行，羟基香茅醛的产率达87.7%。
After acid catalytic dehydration the condensate subsequent hydrolysis was proceeded in the existence of protective agent, the yield of hydroxycitronellal came up to 87.7%.
以嫁接在云南黑籽南瓜砧木上的伽师甜瓜为试材，探讨香草酸、香草醛和对-羟基苯甲酸为代表的酚酸类物质对嫁接伽师瓜植株和保护酶活性的影响。
The phenolic acids used were vanillic acid, vanillin and P-hydroxy benzoic acids for studying the effects of phenolic acids on the growth and activities of protective enzymes of muskmelon.
羟基处于醛基邻位和对位的苯甲醛与几种苯乙酮衍生物的缩合，多数没有得到预期的产物，或收率极低；苯乙酮环上的羟基对缩合反应影响很大，羟基越多，缩合越困难。
The groups in ring of benzaldehydes, no matter they are electron withdrowing or electron donating except of hydroxy, do not seem to have much effect on the yield.
最常用的羟基保护基可归纳为三类：酯类、醚类和缩醛或缩酮类。
The hydroxyl groups can be changed into esters, ethers, acetals and ketals, etc.
研究桂醛、羟基香茅醛对小鼠离体皮肤透皮吸收率。
Study on Synthetic Technique of Hydroxycitronellal by means of Citronellal Protected by Diethanolamine;
研究桂醛、羟基香茅醛对小鼠离体皮肤透皮吸收率。
Study on Synthetic Technique of Hydroxycitronellal by means of Citronellal Protected by Diethanolamine;
应用推荐