丙酮醛

Secondly,a mixture of acetone and methyl formate was added into the methanol solution of sodium methoxide to prepare sodium formyl acetone by Claisen reaction.

以金属钠为原料，甲醇为溶剂，先制成甲醇钠的饱和甲醇溶液，再滴加丙酮和甲酸甲酯进行Claisen酯缩合制得丁酮烯醇钠，最后在强酸作用下与甲醇进行缩醛化反应合成了4，4-二甲氧基-2-丁酮，过程总收率达到73.1%，纯度98.7%。

Glyceraldehyde 3-phosphoate is converted to 1,3-bisphosphoglycerate(by glyceralbehyde 3-phosphatedehydrogenase) which reacs with ADP to give 3-phosphoglycerate and ATP (catelyzed by phosphoglycerate kinase).

果糖1，6二磷酸裂解为甘油醛3－磷酸和二羟丙酮磷酸；则两个丙糖被丙糖磷酸化异构酶相互转化。

During the reaction, a by- product, shown as formula below, is formed at the same time as the pseudo-ionone, because of an impurity in the citral, thereby resulting in a mixture of pseudo- ionone and formula, referred to herein as a pseudo- ionone mixture or as crude pseudo-ionone.

假性紫罗兰酮的制备柠檬醛和丙酮的下列反应：这种反应通常是进行的温度面向对象之间的1000长在反应，1分产品，如公式所示以下，在形成同时，伪酮，因为有一个杂质在柠檬，从而在一个假性和公式混合物产生的，下称一假性混合物或原油伪紫罗兰。

The company is committed to the wholesale, retail chemical products, including: industrial toluene, xylene, white oil methanol, ethyl, n-butyl, C ketone, butanone, anti-Whitewater, cyclohexanone, etc. methylal more than 40 kinds of products, the average monthly sales volume over 4000 tons.

本公司主要致力于批发，零售化工产品，包括：工业用甲苯，二甲苯，白电油甲醇，乙酯，丁酯，丙酮，丁酮，防白水，环已酮，甲缩醛等40多种产品，平均月销量达4000多吨。

SW480 and SW620 cells were also used to study the gene regulation with high carbohydrate intake, where it was shown that during glycolysis eight genes, HK1 (nuclear gene encoding mitochondrial protein, transcript variant 1), GPI, GAPD (glyceraldehyde-3-phosphate dehydrogenase), PGK1 (phosphoglycerate kinase 1), PGK2 (phosphoglycerate kinase 2), ENO2 (enolase 2), PKM2 (pyruvate kinase, muscle, transcript variant 2) and GLUT1 (facilitated glucose transporter, member 1) are over-expressed. In our study, we also found that during hypoxia of cancer tissues the resulting up-regulation of HIF-2α(hypoxia-inducible factor 2, alpha subunit) would in turn up-regulate the GLU1 gene, further activating glycolysis.

另一方面，在高碳水化合物的调控研究上，吾人也利用SW480和SW620细胞株分析证实醣解水解活化过程中，其六碳醣激酶-1(HK1)、葡萄糖磷酸异构酶、3-磷酸甘油醛脱氢酶、磷酸甘油酸激酶-1(PGK1)、磷酸甘油酸激酶-2(PGK2)、烯醇酶-2(ENO2)、丙酮酸激酶-2(PKM2)以及葡萄糖输送蛋白-1(GLUT1)等共有8个基因是连续上升的过度表现；此外，吾人也发现当癌细胞在缺氧的组织中，其缺氧转录子-2α基因(HIF-2α)表现上升后，会活化GLU1基因上升，进一步活化醣解代谢的进行。

Which doesn't pollute environmen t.This method for synthesis of 4-(1,3-benze-dioxole)-3-buten-2-one uses Claison -Schmidt reaction of piperonal and acetone between wate r phase and organic phase.

这种不污染环境的合成方法是用洋茉莉醛 [1 2 0 - 57- 0 ]与丙酮 [6 7- 6 4 - 1 ]在水相和有机相之间进行克莱森-施密特反应；产物分离后有机层循环再用，水层经过活性炭吸附处理后也循环使用，做到了无试验废水排放。

Experimental wastewater was composed of glucose and potassium sorbate wastewater.

废水的组成包括丁烯醛、山梨酸、山梨酸钾以及生产过程的载液、丙酮、醋酸、乙醇、甲醇等。

The bio-oil was composed of acetic acid, hydroxyacetaldehy, acetol, levoglucosan, furaldehyde, and a small quantity of phenols.

结果表明，热解温度为460~520℃时热解油产率最大，主要有醋酸、羟基乙醛、羟基丙酮、左旋葡聚糖、糠醛，油热值为17.0MJ.kg-1；热解气主要为CO2和CO，还含有少量H2、CH4和C2~C4的烯烃。

METHODS Acetylacetone, 4－Dimethylaminobenzaldehyd and alcohol without aldehyde were used as color reagents. The determination method was colorimetry.

以乙酰丙酮、无醛乙醇和对二甲氨基苯甲醛溶液为显色剂，用比色法测定。

The key step involves reduction-amination of benzamine and -acetonide glycealdehyde 20 synthesized from cheap and available ascorbic acid . The hydrolysis product of 21 condensed with triphosgene to get 6, key intermediates of Linezolid and Eperizolid. After a series of reactions, we got Linezolid and Eperizolid in reasonable yields and purity. The spectrum and 〓 values of compounds 6 and other intermediates were identical with literature reported.

我们以国内非常便宜易得的维生素C为原料合成得到-丙酮保护的甘油醛20，20和取代苯胺经还原胺化反应制备得到二噁烷21，21水解后与三光气缩合成环得到利奈唑酮和埃皮唑酮的关键中间体6.6经一系列的反应合成得到了利奈唑酮和埃皮唑酮。6及一些中间体的〓D值与文献报道的数据相吻合。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。