丁酸

In this thermodynamic study, the minimum requirements in molar fraction of the solvents (x3) on the azeotropic feed plate are: 0.20 for N,N-dimethylformamide, 0.36 for 2-ethoxyethanol, 0.40 for 1-pentanol and 0.66 for butyl propionate,.

在这个热力学研究中，共沸混合物喂料盘上各溶剂摩尔分数最小值(x3)分别是：N，N-二甲基甲酰胺：0.20；2-乙氧基乙醇：0.36；1-戊醇：0.40；丙酸丁酯：0.66。

Ordinarily the reaction rate of amino acids is faster than that of glycols, but the carbon chain of ethylene glycol is very short, the reaction rate of L-aspartic acid was longer than that of ethylene glycol.

另外，丁二醇比乙二醇碳链长，位阻大，反应慢；通常氨基酸的反应速度要比醇快，但由于乙二醇的碳链很短，导致其比天冬氨酸的反应速度还快。

Results of the FTIR spectra indicate that the mercaptosuccinic acid chains are assembled on the gold cores via the Au-S bond.

傅里叶变换红外光谱仪结果表明，巯基丁二酸与金形成了Au—S键，并得到了Auxy形式的MPC。

One can go to the hospital take a lumbosacral plain film to exclude recessive congenital spina bifida 2, drug therapy:(1) acid imipramine (2) enuresis Ding (3) Sang Nitramine scattered nest of eggs of mantis ( 4) Acupuncture: Sanyinjiao,阴陵Stephen, Zusanli, gas sea, Shenshu such.

可去医院拍一张腰骶椎平片排除先天性隐性脊柱裂2、药物治疗：(1)酸丙咪嗪(2)遗尿丁(3)桑螵硝散(4)针刺：三阴交、阴陵泉、足三里、气海、肾俞等。

With headquarter in Shanghai, Kaikai Yuansheng Medicine is manufacturing and exporting the API裈rimebutine maleate and its intermediates with chemical name of Phenyl-2-Dimethyl Amino-2-Butanol as well as 150 kinds of medicinal products.

开开援生制药总部设于上海，主要生产和出口马来酸曲美布汀医药原料、中间体2-苯基-2-二甲氨基-丁醇及中西药品共150多个品种。

The series of catalysts for dehydrogention of n-butane to 1-butene, including oxidative dehydrogenation with Vanadium-based 、molybdates、metal pyrphosphates catalysts and catalytic dehydrogenation with Pt-based catalysts and ZSM-5 zeolite, are reviewed, the membrane reactor with catalysts is also discussed .

综述了对正丁烷脱氢制备正丁烯的催化剂体系，包括有氧脱氢中钒基催化剂、钼酸盐系列和焦磷酸盐系列催化剂；催化脱氢中贵金属Pt系催化剂、以ZSM-5分子筛为载体的催化剂以及膜反应器。

It was found that the unblocking temperature of the cationic blocked isocyanatc is 117℃, and the practical starting curing temperature of the paint film is about 140℃. The paint film can be cured completely at 180℃ for 30 min.

结果表明：丁醇封闭的阳离子型封闭异氰酸酯解封温度为117℃，电泳漆膜的实际起始固化温度为140℃左右，在180℃、30min可固化完全。

With peroxide value as experimental index, the oxidative stability of cold pressed oil of Xanthoceras sorbifolia Bunge seed was studied by Schaal experiment using TBHQ, PG and V as antioxidants, V and critic acid as synergists.

采用Schaal烘箱加速法，以叔丁基对苯二酚、没食子酸丙酯、生育酚V(下标 E为抗氧化剂，抗坏血酸V(下标 C和柠檬酸为增效剂，过氧化值为试验指标，研究了光线、温度等对冷榨文冠果籽油抗氧化性能的影响。

The effect of structural variation of the solutes on their separation and retention was noted.

此外，还建立了手性农药喹禾灵和重要药物前体DL-苯丁氨酸乙酯对映体纯度的测定方法。

The TiO2/zeolite doped with each of rare earth ions La3+,Nd3+,Yb3+ was prepared from tetrabutyl titanate and rare earth oxide by solgel process.

以钛酸丁酯和稀土氧化物为原料，采用溶胶凝胶法制备了镧、钕和镱稀土离子掺杂TiO2/沸石光催化剂。

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。