一酸的

In the high alumina cement , dicalcium aluminate silicate is transformed into Q phase.

将高铝水泥中的惰性成分硅铝酸二钙(C2AS)转化为水化活性良好的Q相，组成Q相铝酸一钙七铝酸十二钙(C12A7)高铝水泥系统，对此系统的烧成条件进行研究。

Hydroxamic acid β-glucoside is confirmed as a major natural substrate of maize β-glucosidase.β-glucosidase plays a significant role in defensing some pathogens and pests of maize seedling by releasing hydroximic acids .

并确认了氧肟酸葡萄糖苷即是玉米葡萄糖苷酶的主要底物，以及氧肟酸在玉米葡萄糖苷酶的催化下释放氧肟酸是玉米幼苗时期抵御病虫害的一种重要方式。

In this work, isobutyl isobutyrate was prepared by the condensation of two molecular isobutyraldehyde in the presence of aluminium isobutoxide catalyst system.

依据间歇反应所得一系列数据，确定了异丁醛连续缩合反应工艺流程；考察了以异丁醛为原料，在 5～10℃，停留时间 1 5～ 2h ，在异丁氧基铝催化体系作用下，两分子异丁醛缩合成一分子异丁酸异丁酯；脱除催化剂后，粗产品精制得到纯度≥ 99 5 %的异丁酸异丁酯，异丁醛的转化率≥ 98 5 %，异丁酸异丁酯的选择性≥95 %。

Chinensis and Kuruma prawn M. japonicus increased at 12 and 48 hours post-inoculum, but decreased sharply after 36 and 72 hours post-inoculum respectively. LPS inducible NOS activity also decreased significantly with the time elapsed in WSSV infected shrimps. Results of WSSV detection with the Dig-DNA Probe dot blot hybridization test showed that WSSV of the two penaeid species couldn't be detected until iNOS started decreasing.

在此基础上，我们建立了对虾血细胞中诱导型一氧化氮合成酶的鉴定方法—硝基四氮唑蓝还原法和血细胞形态法以及酶活力的测定方法—L-瓜氨酸分析法和亚硝酸盐分析法并优化了鉴定和测量条件，结果显示：对虾血细胞在4℃下与L-精氨酸和LPS孵育8h以及当L-精氨酸浓度为2.5mmol l〓LPS浓度为100μg ml〓，Ca〓浓度为2.5mmol l〓时，iNOS活力的测定结果最佳。

The enzymatic synthesis of 6-O-lauroylsucrose was performed by transesterification of sucrose with vinyl laurate in a medium constituted by two solvents.

提出了一种酶催化合成蔗糖-6-月桂酸单酯的新方法：在两种有机溶剂混合组成的媒介中，蔗糖与月桂酸乙烯酯在脂肪酶的选择性催化下通过酯交换反应定向合成蔗糖-6-月桂酸单酯。

Prophenoloxidase is a key enzyme for mediating melanotic encapsulation of oocysts,which may be transformed into active phenoloxidase by limiting proteolysis.

而前酚氧化酶(Prophenoloxidase，PPO)是介导卵囊黑化包被反应的一种关键酶，活化后可催化酪氨酸羟基化为二羟基苯基丙氨酸，二羟基苯基丙氨酸和多巴胺可进一步氧化为具有活性的苯醌活性，苯醌即可介导蛋白交联并聚合成黑色素层固定、隔离或杀死入侵的病原体。

As for acetalation, we research the effects of acid kinds, acid quantity, temperature solvents on it and get the conclusions that the optimized acid is sulfuric acid, the optimized temperature is 65 °C, the reaction time is five hours, and the material ratio of sulfuric acid to methylglyoxal to methanol is 0.028:1:6.837.

在醛保护一步中，研究了酸种类、酸用量、温度及其溶剂的影响，得到了本反应的较好条件是：酸为浓硫酸，反应温度为65℃，反应时间为5小时，浓硫酸：丙酮醛：甲醇的配比为0.028：1：6.837，反应收率可达81%。

In the dissertation the low-dimensioned orthovanadate nanomaterials such as Lanthanum orthovanadate (LaVO_4) nanorods, Cerium orthovanadate (CeVO_4) nanorods, Yttrium orthovanadate (YVO_4) nanorods and one-dimensional ammonium vanadate nanomaterials were chosen as the objects of study. Modern testing methods were used to study the preparation, structure and properties of low-dimensioned orthovanadate nanomaterials.

以LaVO_4纳米棒、CeVO_4纳米棒、YVO_4纳米棒等低维稀土钒酸盐纳米材料和一维钒酸铵纳米材料等为研究对象，采用现代测试手段对低维钒酸盐纳米材料的合成、结构和性能进行了深入研究，探讨了组成、结构及性能的相关性，分析了结构形成和性能优化的机理和规律。

The encapsulated TiO〓 particles by polymer were obtained with soapless emulsion polymerization of methyl methacrylate in water in the presence of the pretreated TiO〓 particles.

一种是用偶联剂钛酸丁酯对亲水性TiO〓粒子进行预处理，钛酸丁酯与TiO〓表面羟基反应，交联到TiO〓粒子表面，使TiO〓粒子表面由亲水性转变为憎水性，改善无机粉体与有机单体的亲合性，再进行TiO〓存在下甲基丙烯酸甲酯的无皂乳液聚合，即可得到TiO〓-PMMA复合粒子：另一种方法是用表面活性剂对TiO〓进行预处理，再进行TiO〓粒子存在下甲基丙烯酸甲酯的无皂乳液聚合，TiO〓粒子表面可形成一层均匀的聚合物膜，提出了包覆机理，指出单体在无机粉体表面发生聚合的关键是预先在粒子表面形成聚合场所，即吸附一层表面活性剂。

Objective To establish a HPLC method for the determination of aceclofenac in human plasma.Methods Acidified samples of plasma (500μL) were extracted with 4 mL of ethyl acetate. The organic phase was evaporated to dryness by nitrogen at 40℃ water bath. The residue was redissolved in mobile phase and then was determined.

醋氯芬酸是一种具有镇痛作用的非甾体类抗炎药物[1]，化学名为[邻-(2，6-二氯苯基)氨基]苯乙酰乙酸，l992年首先于西班牙上市，具有明显广泛的抗炎作用和强力的解热镇痛作用，其生物半衰期较双氯芬酸长，胃肠耐受性较双氯芬酸好，抗炎活性优于萘普生和保泰松[2]。

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。