柠檬酸

The Ni and Zn-doped spiculate α-FeOOH were prepared by the coprecipitation method and citric acid method using FeCl2、Zn(NO3)2、Ni(NO3)2 and NaOH as raw material and spiculate α-FeOOH as intermediate. Then they successively were enwraped by citric acid complex of the Ni and Zn and heat treated to get spiculate nano-Ni0.5Zn0.5Fe2O4. The particles size and slenderness ratio of spiculate nano-Ni0.5Zn0.5Fe2O4 were successfully controlled by the doped mass of Ni and Zn in the coprecipitation process.

以FeCl2、Zn(NO3)2、Ni(NO3)2和NaOH为原料，借助针状α-FeOOH做为中间体，有效的把共沉淀法和柠檬酸法相结合，制得掺有镍和锌的针状纳米α-FeOOH，在其表面包裹镍和锌的柠檬酸络合物后，经热处理制得了针状的纳米Ni0.5Zn0.5Fe2O4 ，并通过控制共沉淀法过程中镍和锌的掺入量，有效的控制了针状纳米Ni0.5Zn0.5Fe2O4 的粒径和长径比。

Calcium has the effects of decreasing the concentration of soluble sugar and titratable acid and enhancing the firmness of fruits,has the effects of which was to some degree determined by the ca...

喷氨基酸钙的效果与此相似。在柠檬酸钙分别和Zn、B、IAA配合使用试验中，柠檬酸钙和IAA配合使用效果最好，使果实中钙含量提高了 10 4 89%。

The nano ZnO powders are prepared by citric acid and triammonium citrate by sol-gel method.

以柠檬酸和柠檬酸三铵为络合剂，利用溶胶－凝胶法制备ZnO微粉。

Triethyl citrate was synthesized from citrate acid and ethanol using FeCl3 as catalyst and ethanol as dehydrating.

以三氯化铁为催化剂，乙醇为带水剂，用柠檬酸和乙醇为原料合成了柠檬酸三乙酯。

Chapter Ⅱ: The decontaminating effects of citric acid and chlorine dioxide on beef cuts were studied by the means of orthogonal experimental method.

第二章，运用正交实验的方法，研究了柠檬酸浓度、二氧化氯浓度和喷淋时间对牛肉减菌效果的影响，以得出柠檬酸浓度、二氧化氯浓度以及喷淋时间的最佳组合。

In this paper, the mechanism of PCA esterifying and crosslinking with cellulose and the hydrolysis behavior of ester linkages in treated cotton fabric were studied.

因此有必要对柠檬酸与棉纤维的反应机理、柠檬酸与棉纤维所生成酯键的水解性能进行深入研究。

From the analysis of FT-IR spectra, XRD patterns and SEM morphologies, the special functions of the chelating agents as follow: citric acid chelates metal ions, EDTA adjusts pH values and ethylene glycol polymerizes complex and replaces hydrogen bonds in SBT sol solution.

利用红外光谱、X衍射及扫描电镜等手段，证明柠檬酸主要起络合金属离子作用；EDTA除辅助交联金属离子外，主要用于调节pH值；而乙二醇用来聚合柠檬酸和EDTA，防止氢键产生，起稳定溶胶作用。

The results show that:(1) lower concentration or lower initial pH of citrate solution results in a better desorption efficiency;(2) sparging inert gas or adding surfactants into the liquid can lower the viscosity of the solution and the cavitating threshold, and raise the desorption efficiency of SO2;(3) by comparing the experimental results and theoretical analyses , it was concluded that the experimental results are in accordance with the theoretical analyses.

结果表明：(1)在柠檬酸钠浓度较低，或者柠檬酸钠溶液初始pH值较低的条件下均能产生较好的解吸效果；(2)少量惰性气体的通入或者表面活性剂的加入能够降低溶液黏度，产生空化效应，从而提高了SO2的解吸率；(3)通过对比实验证明解吸结果与理论分析相吻合，其研究结果为SO2的深度解吸提供了技术思路，也为该项技术的工业放大提供了一定的基础数据。

The purpose of this study was to determine the effect of ferric citrate ,citric acid and sodium L-ascorbate on color of mutton chop with L8(23) orthogonal test plan.

通过L8(23)正交试验，研究了不同浓度条件下的柠檬酸铁、柠檬酸和L-抗坏血酸钠对羊排的发色作用。

The optimum formula was determined as follows:organic bamboo leaf extract 70%,citric acid 0.07% and honey 8%.

以柠檬酸和蜂蜜为辅料对竹叶提取液进行调配，确定竹叶茶饮料最佳配方为：竹叶提取液70%、柠檬酸0.07%、蜂蜜8%。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。