丁酸

N-doped TiO2 photocatalysts were fabricated by mixing tetrabutyl titanate with urea in ethanol and water by solgel method, and immobilized to granular activated carbon by coating.

以尿素为N源、以钛酸四丁酯和乙醇为原料，采用溶胶－凝胶法制备N掺杂TiO2，并用浸渍法将TiO2负载于粒状活性炭上，通过烧结制成N-TiO2/AC光催化剂。

The experiment results indicate that higher phase splitting speed and extraction factor can be achieved when low-carbon alcohols such as n-butanol are used as organic solvents; by using five different N-carbobenzyloxy-L-amino acids as chiral ligands that are formated with Cu(superscript 2+) or Ni(superscript 2+), it is found that as a ligand, Z-Phe has a low extraction factor, while Z-Hyp, Z-Pro, Z-Glu, Z-Val have higher extraction factors, and among these, Z-Val has the highest distribution coefficient; pH value of extractant, when near to the PI of phenylalanine, helps to improve extraction resolution effect; temperature has no obvious effect on the resolution result.

结果表明：以低碳醇类正丁醇作有机稀释剂，所用5种N-苄氧羰基氨基酸（分别为Z-Phe、Z-Hyp、Z-Pro、Z-Glu、Z-Val）与Cu(上标 2+)或Ni(上标 2+)形成手性配位体后，以Z-Val作手性配体，萃取相pH值接近苯丙氨酸等电点时，萃取拆分效果最佳。

Many other reactions catalyzed by phosphines have also been studied.

进而用2，3-联烯酸叔丁酯来研究[3+2]环加成反应合成螺环化合物，区域选择性有很大提高，产率也很好。

The surface of nano-ATO powders is modified by using titanate coupling agent and stearic acid as modifier. The modification results are characterized and analyzed by FTIR, XRD, TG, TEM, and the test for sedimentation coefficient and activation index.

以硬脂酸、钛酸四丁酯对掺锑氧化锡纳米粉体进行表面改性，用FTIR、XRD、TG、TEM等分析手段结合沉降系数、活化指数的测试对改性效果进行了表征和分析。

Ethambutol is a first-line drug used for antituberculosis therapy. It is often used in combination with isoniazid, rifampin, pyrazinamide, and streptomycin. The action of EMB in antituberculosis mechanism is the destruction of cell wall of tubercle bacilli via binding the target molecule -- arabinosyl transferases. These enzymes are involved in the polymerization of the cell wall arabinan. Inhibition of arabinan synthesis by EMB results in the accumulation of mycolic acids, leading to cell death.The EMB-resistance of MTB is involved with the mutation of emb operon or the over expression of emb operon.

乙胺丁醇是和异烟肼、利福平、链霉素、吡嗪酰胺联合治疗结核病的一线抗结核药物，EMB对结核分枝杆菌的作用机制与分枝杆菌胞壁结构破坏有关，主要作用于靶分子阿拉伯糖基转移酶，抑制了阿拉伯糖基聚合入阿拉伯半乳聚糖，从而影响细胞壁分枝菌酸-阿拉伯半乳聚糖-肽聚糖复合物的形成，导致菌细胞的死亡。

Aliquots were subjected to impedance aggregometryin response to collagen, adenosine diphosphate, ristocetin,and arachidonic acid performed at 22°C, 34°C, 37°C,and 40°C.

一部分用作在22°C 、34°C 、37°C 和40°C 下测定对胶原、二磷酸腺苷、瑞斯西丁素和花生四烯酸反应中的阻抗集合度测试。

Plackett-Burman design was used to evaluate the effects of eleven factors for succinic acid production by Escherichia coli NZN111.

采用Plackett-Burman设计法(Plackett-Burman， PB)对影响Escherichia coli NZN111厌氧发酵生产丁二酸的11个因子进行了筛选。

The first order kinetic models based on subsection were setup to characterize the catalytic wet oxidation of succinic acid.

建立了丁二酸催化湿式氧化的一级分段动力学模型。

Methods 107 cases of reflux esophagitis were divided into 3 groups. Scheme A(n=33),domperidone (10 mg po,tid);Scheme B(n=38), Ranitidine bismuth citrate (350 mg,po,bid ) and Scheme C(n=36), omeprazole(40 mg,po,qd) for 4 weeks. Data was evaluated using the pharmacoeconomic costeffectiveness.

将107例返流性食管炎患者随机分为A、B、C三组，A组（n=33）予多潘立酮10 mg，口服，3次/d；B组（n=38）予枸橼酸铋雷尼替丁350 mg，口服，2次/d；C组（n=36）予奥美拉唑40 mg，口服，1次/d，疗程4周。

Synthesis of polyester polyol of sebacic acid series;2. Study on catalyst used to synthesis of polyester polyol ;3. A series of polyester-based thermoplastic polyurethanes elastomer were prepared from polyester polyol ,diphenylmethane-4,4'-diisocyanate and 1,4-butanedio by one-step process.

以聚酯多元醇、4，4'-二苯基甲烷二异氰酸酯和1，4-丁二醇为原料制备了一系列聚酯型热塑性聚氨酯弹性体，对硬段含量、软段种类和软段的分子量等分子结构参数对其力学性能和阻尼性能的影响进行了研究，探索影响规律性，采用原子力显微镜对其软/硬段微相分离结构进行了研究。

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。