乙醛

The optimum conditions of synthesis were determined as follows:molar ratio of 2,4-di-t-amylphenol and anhydrous trimeric acetaldehyde 2∶1.2,amount of water 180 g,amount of emulsifier 0.5 g,and amount of catalyst 11.0 g at reacting temperature 80～83℃ for 5 h.

以2 ，4-二叔戊基苯酚、无水三聚乙醛为反应原料，采用含有表面活性剂、酸性催化剂的水作为反应溶剂，缩合反应合成2，2′-亚乙基双(4，6-二叔戊基苯酚)。

HCHO drops spirally along with the time,and but with transitory rises in summer,acetone and acetaldehyde decreases wavily.

空气中甲醛随使用时间的延长呈现伴夏季升高的螺旋样下降趋势；丙酮和乙醛呈波浪样下降；VOCs的污染水平使用初期最高，但下降较快，1个月后至初始的1/10～1/20。

The SPC-2S fraction with 30% EtOH were constituted epicatechin and epicatechin gallate ester ;The SPC-2S fraction with 50% EtOH contained epicatechin and dimeric procyanidins, another SPC-3S contained epicatechin ,dimeric procyanidins and trimeric procyanidns ;Dimeric procyanidins and trimeric procyanidns constitute SPC-5S fraction;monomer dimer trimer tetramer pentamer of procyanidins were the major fractions in 70% acetone elute solution.

1和 2.01：1，也以添加0.1%SPC酒样中两者的比例最为协调；对小曲酒中酸的影响表现为，添加SPC后有利于降低酒样中乙酸的含量，各酒样中乙酸的量随着SPC添加量高粱外种皮中原花青素及其对小曲白酒挥发性成分影响机制研究的增加而降低；对醛类的影响为，添加SPC可降低酒样中糠醛的含量，其中以添加 0.1%SPC酒样中含量最低，为对照组的39.3%，而4个酒样中乙醛含量则无明显差别；低SPC添加量有降低酒样中杂醇油含量的趋势。

Oxalic acid ; glyoxylic acid ; cathodic electrolyzing ; electrode activizing

草酸；乙醛酸；阴极电解；电极活化；离子膜

Objective To examine whether MAA adducts might participate in the immune response associated with human alcohol-induced liver disease.

目的 探讨丙醛－乙醛加合物是否参与了酒精性肝病患者的免疫反应。

Methods The experiments adopted eternalized human hepatic stellate cell (HSC-T6) builded model by acetaldehyde,for study in vitro.

方法采用乙醛造模后的肝星状细胞株HSC-T6作为体外研究模型，以赤芍水提物给彼格犬一次性灌胃，取给药前的血清、给药后1h、2h、3h、5h血清作为实验药物血清。

The effect were validated by different yeasts、different malts、10L fermentation equipment .

同时采用气相色谱和液相色谱对甲醛、乙醛、5-羟甲基糠醛含量进行分析，并以不同种酵母、不同种麦芽糖化，10L 发酵罐的小试实验对调节剂效果进行验证。

Langone JJ (1982) Protein A of Staphylococcus aureus and related immunoglobulin receptors produced by streptococci and pneumococci.

其中，醛基免疫磁性载体的捕获和分离效果最佳，且用乙醛—右旋糖苷进行包被可以消除交叉反应。

The Michigan study, which began in late 2004, indicates cells from normal and cancerous breast tissue that contain high levels of the enzyme group aldehyde dehydrogenase acted like stem cells.

该研究显示，正常乳腺组织和癌变乳腺组织的细胞中均含有大量的乙醛脱氢酶酶组，它们所起的作用就如同干细胞。

Any of a class of monosaccharide sugars containing an aldehyde group.

醛缩醇，醛缩二醇任何一种由乙醛和乙醇结合而成的化合物

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。