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The novel synthesis of the 2-hydroxyl α-arylglycines was realized through the Lewis acids promoted Friedel-Crafts reaction of phenols and N-tosyl imino ester in mild reaction conditions.

其中在路易酸TiCl〓促进下，酚类化合物和亚胺酯发生的傅克反应，可较高产率、较高区域选择性的得到2-羟基α-芳香甘氨酸衍生物。

In the fifth part, asymmetric synthesis of β,γ-trans-alkenyl α-amino esters was achieved by chiral phosphoric acid catalyzed transfer hydrogenation of β,γ-alkynyl α-imino esters. Utilizing Hantzsch ester as the hydrogen donor, both the alkyne and imine moieties of β,γ-alkynyl α-imino esters were reduced to yield β,γ-trans-alkenyl α-amino esters with up to 96% ee.

第五部分工作中，使用手性磷酸作为催化剂，Hantzsch酯作为氢源，β，γ-炔烃取代的α-酮酸酯亚胺中的炔键和亚胺官能团均被还原，以中等的收率和优秀的对映选择性（up to 96% ee）得到β，γ-反式烯烃取代的α-氨基酸衍生物。

Meanwhile,The impact of alcohol concentration,fermentation temperature,inoculums dose,initial sugar concentration,rotation speed,initial pH value to acid yield and ester yield in the process of solid-state fermenting craft was studied.

同时研究了酒精度、发酵温度、接种量、起始糖度、摇床转速、初始pH值等因素在固态发酵过程中对产醋酸和产酯量的影响。

We define a novel valence δiv through connecting quantum chemical parameters with molecular connectivity index and apply it to the QSRR of alcohol, ketone, ester compounds.

最后，本论文还把量子化学指数用于分子连接指数的改进，以原子的电荷密度为该原子点价的方法对醇、酯、酮类化合物的QSRR关系进行了研究，所得模型的相关性也比较理想。

The asymmetric reduction of prochiral P-oxo ester, aromatic ketone and aliphatic ketone to its corresponding chiral alcohol by yeast cells were studied respectively in this work when ethyl 4-chloro-3-oxobutyrate, acetophenone and 2-octanone were as the model substrates.

本文以4-氯乙酰乙酸乙酯、苯乙酮和2-辛酮分别为β-羰基酯、芳香酮和脂肪酮的模型底物，研究了利用活性酵母细胞催化这三类前手性酮不对称还原合成相应手性醇的反应特性。

The flash point and the spontaneous ignition temperature of binary flammable liquid mixtures consisting of alcohol species,ketone species,aether species and ester species with different proportion were studied by automatic closed-cup flash point tester and automatic ignition temperature detector.

利用自动低温闭口闪点测定仪、自动引燃温度测定仪对醇、酮、醚、酯等不同情况下组成的二元混合液体的闪点、自燃点变化规律进行了实验研究，采用Taylor多项式，拟合出了常压下二元混合液体闪点、自燃点随组分配比变化的经验计算公式，并通过实验数据对其进行了验证。

Nine substances containing hydrocarbon, alcohol, ketone, ester, water and 18 systems of isothermal VLE date have been calculated and the results show that using the quadratic functional local composition mixing rule the precision of vapor composition and pressure calculation is better than by using temperature mixing rule.

结果表明，二次形局部组成混合规则优于温度函数混合规则，对于丙酮-水、乙醇-水、甲醇-水及苯-丙醇体系计算气相组成与压力精度均有明显提高。

Wind turbines made of Ashland's vinyl ester resin have been used in wind power markets of Inner Mongolia and Xinjiang and are leading the development of global wind power market.

目前，用亚什兰乙烯基酯树脂制成的风机已应用在内蒙古、新疆等风电市场，引领全球风电市场的发展。

By simply stirring L-dopa methyl ester 1 and aldehyde 2 with anhydrous sodium acetate in acetic acid at room temperature for several hours, we obtained the desired 1, 3-syn compound 3 predominantly.

Et-743类似物的合成：由于化合物14 C-1位的保护基没能脱除，所以我们决定调整合成路线，采用了先将化合物13的C-1位的保护基脱除，再将C-21位羰基还原氰基化的策略。

OBJECTIVE: To prepare L-dopa methyl ester hydrochloride eye ointment and establish a method for its quality control.

目的：制备盐酸左旋多巴甲酯眼膏并建立其质量控制方法。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。