leaf blade small, entire or fimbriate-ciliate, veinless, 1-channeled on back, sometimes plane or convex.

segments 5, free, ovate to suborbicular, veinless, abaxially with a transverse wing near apex, adaxially concave, margin membranous.

裂片5，离生，卵形到近圆形，无脉，背面具横裂翅近先端，凹，边缘膜质。

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suprapubic prostatectomy with ligating inferior vesica artery in the treatment of the high risks of bph patients: report of 35 cases

结扎膀胱下动脉耻骨上前列腺切除术治疗高危前列腺增生症35例

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vesica percutaneous bladder neck suspension for female stress incontinence

Vesica经皮膀胱颈悬吊治疗女性压力性尿失禁

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the separation of the sphere - creates an oval opening - the vesica pisces - opening in the penis - shape of the eye.

球的分离-创造了一椭圆口-两端尖的椭圆形-阴茎的开口-眼睛形状。

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higher alcohol acrylates were synthesized by direct melt esterification of acrylic acid with higher alcohols, catalyzed by p-toluenesulfonic acid in the absence of poisonous methylbenzene.

以丙烯酸和高碳醇为原料、固体酸为催化剂，采用熔融酯化法合成了不同碳链长度的丙烯酸高碳醇酯纯品。

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abstract a saturated hydroxy polyester resin has been prepared with polycarboxylic acid and polyol at the presence of catalyst and chain transfer agent by the direct melt esterification process.

在催化剂、链支化剂存在下多元酸和多元醇直接熔融酯化、常压缩聚合成饱和羟基聚酯。

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it is well known that direct esterification of carboxylic acid/ alcohol and transesterification of ester/ alcohol play important roles in the production of organic esters, especially for some important products and intermediates in the organic, bioorganic, pharmaceutical industries and related fine-chemical synthesis.

众所周知，简单酸与醇的酯化和转酯反应在有机酯的生产中，尤其是在有机、生物有机、药物工业和相关的精细化学品合成中扮演着重要角色。

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to explore a new technology for synthesis of bis ( 2-hydroxyethyl) terephthalate from terephthalic acid and ethylene glycol, feasibility of reactive distillation process for the direct esterification was analyzed with the aid of residue curve map using aspen plus simulation package.

为开发聚对苯二甲酸乙二醇酯聚酯单体新的生产工艺，利用剩余曲线图，对反应精馏直接酯化合成的可行性进行了分析。

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the direct esterification of pta was studied under different process conditions. the kinetic model of esterification was obtained based on zero order and first order reaction models. the kinetic simulation showed that the first order reaction model fitted the practical production well.

研究了不同工艺条件下精对苯二甲酸（PTA）的直接酯化过程，分别按零级和一级动力学模型处理，得出了酯化反应的动力学模型，动力学模拟表明一级动力学模型更为接近实际生产过程。

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gallic acid lauryl alcohol ester was synthesized from gallic acid and lauryl alcohol by direct esterification using solid super acid s_2o_8 2-/ zro_2 as catalyst in the solvent of dioxane.

以固体超强酸S2O82-/ZrO2为催化剂，以没食子酸和月桂醇为原料，二氧六环作溶剂，直接酯化合成没食子酸月桂醇酯。

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hence, taking an industrial process of polyethylene terephthalate ( pet) as the object, a mathematical model of direct esterification process of pet is set up based on both the esterification mechanism and the real process conditions.

为此本文以一个实际的聚酯生产过程为对象，结合聚酯酯化反应机理及实际工艺条件，建立了聚酯直接酯化过程的数学模型，同时给出求解方法。

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using conditional test, the isobutyraldehyde glycol acetal was synthesized from isobutyraldehyde and ethylene glycol by direct esterification using strong acidic cation exchange resin as catalyst.

运用条件实验法，以异丁醛、乙二醇为原料，强酸性阳离子交换树脂为催化剂，合成了异丁醛乙二醇缩醛产品。

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isopropenyl acetate was synthesized from ketene and acetone by direct esterification using strong acidic cation-exchange resin to substitute h2so4 as catalyst.

以乙烯酮和丙酮为原料，用强酸性离子交换树脂代替浓硫酸作为催化剂，直接酯化合成乙酰丙酮的中间体乙酸异丙烯酯。

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n-octyl acetate was synthesized from n-octanol and acetic acid by direct esterification using strongly acidic cation exchange resin as catalyst.

以乙酸和正辛醇为原料，强酸性阳离子交换树脂为催化剂，直接酯化合成了乙酸辛酯。

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using sncl_4 · 5h_2o/ c as catalyst, acetic acid and ethanol as raw materials, ethyl acetate was prepared via direct esterification.

以SnCl4·5H2O/C为催化剂、用乙酸和乙醇为原料，直接酯化合成乙酸乙酯。

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experiment results indicated that hz-type solid acids were ideal catalysts for direct esterification of straight chain carboxylic acids and primary alcohols.

试验表明HZ型固体酸是饱和直链羧酸和伯醇直接酯化的特效催化剂。

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the factors effecting the melt direct esterification and normal solvent direct esterification of acrylic acid and octadecyl alcohol were investigated.

采用两种酯化方法制备了丙烯酸十八酯，研究了影响酯化反应的因素。

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soft-determination of quality-indices in a continuous direct esterification process

连续直接酯化过程质量指标的软测量

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by using the direct esterification polycondensation method synthesized polytrimethylene terephthalate with higher characteristic viscosity and nucleating agent.

采用直接酯化缩聚路线合成了具有较高特性黏度、含成核剂的聚对苯二甲酸丙二醇酯（PTT）材料。

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a study on the kinetics for synthetic reaction of β-hydroxyethyl acrylate from direct esterification

直接酯化合成丙烯酸β&羟乙酯反应动力学研究

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