丁酸

Among pathogens , the most common pathogens associated with VAP were Pseudomonas aeruginosa ( 3013 %), Acinetobacter baumanii (1115 %), Klebsiella pneumoniae ( 1017 %), Escherichia coli ( 716 %) and S taphylococcus aureus ( 618 %). Their multiple drug2resistance to antibiotics was serious. Drug sensitivity tests indicated that the GNB had lower drug2 resistance to such antibiotics as imipenem , amikacin , piperacillin/ tazobactam , ceftazidime , cefepime , cefoperazone/sulbactam , ciprofloxacin and ticarcillin/ clavulanate. Polymicrobial pathogens were more isolated in late2onset VAP than in early2onset VAP.

结果 共检出致病菌383 株，革兰阴性细菌占8411 %，其中非发菌占5114 %，肠杆菌科占3216 %，革兰阳性球菌占1218 %，其中MRSA和MRSE 占615 %，真菌占311 %；前5 位致病菌分别为铜绿假单胞菌(3013 %)、鲍氏不动杆菌(1115 %)、肺炎克雷伯菌(1017 %)、大肠埃希菌(716 %)、金黄色葡萄球菌(618 %)等；药敏结果显示这几类菌株的多重耐药现象严重，较为敏感的抗菌药物有亚胺培南/西司他丁、阿米卡星、哌拉西林/他唑巴坦、头孢他啶、头孢吡肟、头孢哌酮/舒巴坦、环丙沙星及替卡西林/克拉维酸等，革兰阳性细菌均对万古霉素敏感；迟发性VAP 的混合培养比例显著高于早发性VAP。

Nd_2O_3 was used as the catalyst for esterification of n-butyl alcohol with propionic acid.

采用氧化钕为固体催化剂，对丙酸丁酯合成的最佳工艺条件作了研究。

Under the optimal technical conditions the conversion of propionic acid reached 96.7%.

在最佳工艺条件下，丙酸丁酯得率可高达96.7%。

TiO2 hollow nanofibers have been successfully synthesized by an electrospinning technique, using Ti(OC4H9)4, polyvinyl pyrrolidone and absolute ethanol as the starting materials.

采用静电纺丝技术，以钛酸丁酯[Ti(OC4H9)4]、聚乙烯吡咯烷酮和无水乙醇为原料，制备了TiO2空心纳米纤维。

Four symmetrical and asymmetrical pyrylium - squarylium cyanine dyes were synthesized.

合成了四个对称及不对称含叔丁基吡喃鎓方酸的菁染料，通过光谱和元素分析确定其结构，测定了它们的紫外-可见吸收光谱、熔点和溶解性能。

The result of the test showed that the fed quantity of TiO2 was 1.25 mg／mL,the photocatalytic degradation of the pyridine was in conformity with the first order kinetic equation,the feeding of 0.2％H2O2 obviously increased the degradation rate of the pyridine and the nitrogen in the pyridine converted into ammonia nitrogen;the pearlite-loaded TiO2 had the same catalytic effect as that of powered TiO2 and was easy to recover and reutilize.

以钛酸四丁酯水解法制备TiO2，采用溶胶一凝胶法在膨胀珍珠岩上负载TiO2，在UV-TiO2体系中对水中吡啶进行光催化降解，结果表明：TiO2加入量为1.25mg／mL，吡啶的光催化降解符合一级动力学方程，加入0.2％H2O2可明显加快吡啶的降解速度，吡啶中氮转化为氨氮，珍珠岩负载型TiO2与粉末TiO2具有相同的催化效能，且便于回收和重复使用。

The GLE of MA-dibutyl sebacate were calcualted by the data looked from literature on COOOC using UNIFAC method.

查取文献报道的涉及COOOC基团的汽液平衡数据，由UNIFAC方法和回归关联的方法计算出癸二酸二丁酯-顺酐体系的气液平衡关系。

Two kinds of fluids including liquid crystal and the mixture of liquid crystal and dibutyl sebacate were injected into the micro motors with four different structures of electrodes respectively.The renational corves between the rotate speed of the rotor and the voltage were got,and a series of conclusions o...

分别将单体液晶和单体液晶与癸二酸二丁酯的混合液体注入具有4种不同电极结构的微马达，得到了8条转子转速与电压的关系曲线，得出了转速与电压、液体种类、电极结构等关系的一系列结论。

After getting two systems'GLE, absorption experiment was operated in laboratorytype equipment and the operation condition of dibutyl sebacate as absorbent were studied, the relationship of 〓 and the content of maleic anhydride in gaseous mixtures, the temperature of gaseous mixture, the liquid and gases ratio, the temperature of absorbent and the content of maleic anhydride in absorbent were studied respectively.

在获得气液平衡关系后，在自行设计的小型实验设备上分别就癸二酸二丁酯吸收顺酐的操作条件：进塔气中顺酐含量的变化、进塔气体温度的变化、液气比的变化、进塔溶剂温度的变化和吸收剂中顺酐含量的变化等对吸收效率的影响进行了初步探讨，推荐了合适的操作条件。

Three plasticizers were used: namely dioctyl phthalate, di n butyl phthalate and di(-2-ethyl-hexyl)sebacate.

研究中采用的增塑剂为邻苯二甲酸二辛酯、邻苯二甲酸二正丁酯和癸二酸二辛酯。

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。