碳酸

Taking ZnSO47H2O and NH4HCO3 as raw materials and mixing them with a certain amount of MgSO47H2O, the powder of nano-crystalline alkali zinc carbonate was prepared.

以ZnSO47H2O和NH4HCO3为原料，掺入一定质量的MgSO47H2O，制备纳米微晶碱式碳酸锌粉体。

Hydrochloric acid ; Metal recovery ; Basic zinc carbonate ; Magnetic field

盐酸；金属回收；碱式碳酸锌；磁场

The good corrosion resistance of hot dip galvanized steel products in nature environments is due to the formation of a protective basic zinc carbonate film on the surface of the zinc coatings.

热浸镀锌表面会生成具良好保护性的碳酸锌膜，保护锌材在一般环境中不致腐蚀太快。

With the increase of catalyst dosage, the desulfurization rate decreased using zinc oxide or manganese carbonate as oxidation catalyst, but first increased and then decreased using boric acid as the catalyst.

使用氧化锌或碳酸锰催化剂时，随着催化剂用量的增加，汽油脱硫率总体呈现降低的变化趋势。

Dynamic kinetic analyses were performed for the thermal decomposition of basic zinc carbonate by means of TG and SDTA measurements in CO2. The thermal behavior and the kinetics of the decomposition were studied.

运用TG／SDTA同步分析仪，研究了碱式碳酸锌在流动二氧化碳气氛中的热分解过程及热分解动力学。

Basic zinc carbonate; grain size; depth purification; nanocrystalline

碱式碳酸锌；晶粒度；深度净化；纳米微晶

In esterification of 2,6-NDA obtained from Henkel reaction of 1,8-naphthalenedicarboanhydride catalyzed non-cadmium catalyst zinc carbonate, the effect of process parameters like esterification catalyst and its amount used, reaction temperature and time, and methanol/anhydride molar ration, etc, was investigated.

在碳酸锌催化和二氧化碳气氛中1，8-萘二甲酸酐于300～340℃反应3～4小时，可以较高收率地获得2，6-萘二甲酸粗品，收率达到62％，该产物可以直接用于合成双酯的酯化反应中。

Shi Jing-Ru:嗜eating acidic food or carbonated drinks Aihe people to be careful teeth may have been etching, resulting in the loss of enamel, may be seriously exposed to nerve pulp, a dental root canal treatment, and even pulled out teeth.

嗜吃酸性食物或爱喝碳酸饮料的人，要小心牙齿可能遭到酸蚀，造成珐琅质流失，严重时可能牙髓神经露出来，得接受牙医根管治疗，甚至拔掉牙齿。

Sugared drinks and fatty burgers were promoted by well-rewarded athletes whose own diets were carefully balanced for fitness and health.

拿到高额报酬的运动员们做着碳酸饮料和油腻汉堡的广告，尽管他们自己为了保持健康是绝对不会去碰这类食物的。

3 By dose alkali in a two-pass RO system ; the formula can be used as a reference for design and debugging of the system to calculate the added alkali in two-pass RO .

本文根据水中碳酸平衡原理分析了反渗透系统产水pH值的变化，得出pH值下降量等于系统对HCO3-透过率的负对数的结果，并导出了在两级反渗透系统中加碱调节pH值至8。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。