一酸的

A salt or ester of maleic acid .

雷酸形成的一种盐或酯。

A spray drying process of preparation of diisporopyl malonate with super acid as catalyst was studied.

介绍了一种以喷雾干燥脱水，以超强酸催化酯化合成丙二酸二异丙酯的方法。

A key intermediate of abacavir, named N-(2-amino-4,6-dichloro-5-pyrimidinyl) formamide was synthesized from diethyl malonate and guanidine hydrochloride. This method suits to industry for large scale. The materials are easy to get and very cheap.

2-氨基-4，6-二氯-5-甲酰氨基嘧啶是合成阿巴卡韦的关键中间体，本文拟以丙二酸二乙酯和盐酸胍为起始原料合成这一关键中间体，具有原料来源广，适合大规模生产等优点。

A novel and accurate HPLC method was developed for the determination of optical purity of mandelic acid enantiomers.

建立了一种用高效液相色谱测定扁桃酸光学纯度的新方法。

A salt of manganic acid containing manganese as its anion.

锰酸形成的一种盐，含有锰作为其阴离子。

SO42- bonded to free -OH on pore walls of metatitanic acid during the calcinations acts as the pore structure-directing agent and pore structure support.

不使用有机模板剂，采用超声化学法一步水解制得吸附硫酸根的介孔偏钛酸，500 ℃焙烧得到介孔SO42-/TiO2固体超强酸。

Photodynamic action of methionine-riboflavin mixture with a high level of reactive oxygen species production is a powerful microbicidal system.

甲硫胺酸与核黄素之光动效应可产生高量的活化态氧(reactive oxygen species， ROS)，为一致死能力极强之杀菌剂。

A new design of glass-stoppered microburet was introduced and its installation was described in detail.

介绍了一种环保型酸式自动滴定管的结构、特点及使用方法。

Polyaluminum chloride is a new and efficient inorganic polymer coagulants. The products use aluminum chloride, calcium aluminates made with advanced technology, have a good flocculation effect. its effect is better than the traditional aluminum sulfate and water purification molysite ordinary inorganic coagulants and general polyaluminum chloride.

聚合氯化铝是一种新型高效的无机高分子混凝剂，本产品选用三氯化铝、铝酸钙粉以先进工艺制成，具有良好的絮凝效果，其净水效果优于传统的硫酸铝和铁盐等普通无机盐类混凝剂及一般的碱式氯化铝。

Polyaluminum chloride is a new and efficient inorganic polymer coagulants. The products use aluminum hydroxide, hydrochloric acid, calcium aluminates made with advanced technology, have a good flocculation effect. its effect is better than the traditional aluminum sulfate and water purification molysite ordinary inorganic coagulants and general polyaluminum chloride. Solid products using spray drying technology for liquids and dry products for 10 days.

聚合氯化铝是一种新型高效的无机高分子混凝剂，本产品选用氢氧化铝、合成盐酸、铝酸钙粉以先进工艺制成，具有良好的絮凝效果，其净水效果优于传统的硫酸铝和铁盐等普通无机盐类混凝剂及一般的碱式氯化铝，固体产品采用喷雾干燥技术，对液体进行干燥，产品为淡黄色。

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。