丁醛

2Mol/L. It was also found that the effect of crotonaldehyde on the copolymerization is inhibition.

丁烯醛对共聚合反应有一定抑制作用。

The methods of determination of crotonaldehyde in various samples of the PVA producing line by gas chromatography and flame ionization detector are discussed in this paper.

探讨了采用气相色谱法，氢火焰离子化检测器测定聚乙烯醇生产过程各种有机物料中的丁烯醛含量的方法以及操作条件、内标校正因子的求法。

It has registered capital of 5 million USD, total investment of 200 million Yuan RMB and main products of 100,000 tons of acetic acid, 90, 000 tons of acetic aldehyde, 40, 000 tons of crotonaldehyde and 5000 tons of butyl acetate.

中海先锋化工有限公司成立于2006年3月，注册资本500万美元，总投资2亿人民币，主要产品有年产10万吨醋酸、9万吨乙醛、4万吨巴豆醛和5000吨醋酸丁酯。

The main products are lndustrial Crotonaldehyde,Mixture of Organosilicon Monomer,Industial Sodium Polyacrylate and acrylate bond.

目前，主要产品有松江牌丁烯醛、有机硅混合单体、甲基氯硅烷等系列产品、工业聚丙烯酸钠、丙烯酸酯类粘合剂等系列产品。

Condensation of cinnamaldehyde with methyl crotonate in the presence of alcohol-flee potassium methoxide gives,after hydrolysis,p-phenyl-benzoic acid in low yield.Its structure has been ascertained by direct comparison with an au- thentic sample.

桂皮醛与α-丁烯酸甲酯在催化剂去醇的甲氧基钾影响下进行反应，得到低产率的对-苯基-苯甲酸，共结构经用已知方法所得同样的酸直接加以比较而确定。

The basic functionalized ionic liquid, 1 -butyl-3-methylimidazolium hydroxide OH, was prepared and used to catalyze the Knoevenagel condensation of aromatic aldehydes with malononitrile or ethyl cyanoacetate.

合成了碱性功能化离子液体氢氧化1-丁基－3-甲基咪唑，研究了将其作为催化剂催化芳香醛和丙二氰、氰基乙酸乙酯的Knoevenagel缩合反应。

The basic functionalized ionic liquid, 1-butyl-3-methylimidazolium hydroxide, was prepared and used to catalyze the Knoevenagel condensation of aromatic aldehydes with malononitrile or ethyl cyanoacetate.

合成了碱性功能化离子液体氢氧化1-丁基-3-甲基咪唑，研究了将其作为催化剂催化芳香醛和丙二氰、氰基乙酸乙酯的Knoevenagel缩合反应。

Surface organometallic chemistry ; tetrabutyl tin ; HY molecular sieve ; grafting reaction ; catalysis ; furfural ; furfuryl alcohol

表面金属有机化学；四丁基锡； HY分子筛；接枝；催化；糠醛；糠醇

Objective To compare influence of several biotic elicitors （yeast extract, oligogalacturonides, and fungal elicitor） and abiotic elicitors （Ag^＋, Co^2＋, and a-amino isobutyric acid） on tanshinone production in the hairy root culture of Salvia miltiorrhiza.

目的比较几种生物诱导子酵母提取物、寡半乳糖醛酸、真菌诱导子3和非生物诱导子（Ag^＋、Co^2＋和α-氨基异丁酸）对丹参毛状根培养生产丹参酮的影响。

The ketalization of cyclohexanone and 1,4-butanediol catalyzed by the Hβ zeolite was studied.Effects of reaction time,mole ratio of reactants and amount of catalyst on the yield of ketal were studied.Results showed that the Hβ zeolite was an efficient catalyst for the synthesis of ketal.

研究了Hβ分子筛催化1，4-丁二醇与环己酮的缩合生成新型七元环缩酮的反应，考察了反应时间、酮与醇的配比、催化剂用量、催化剂重复使用等因素对醛与醇缩合反应的影响。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。