查询词典 malic acid

A salt or an ester of malic acid.

硝酸根，硝酸盐一价的根NO3或包含它的化合物，如一种硝酸盐或者酯

The third section was about the primary study of DL-malic acid using sequential injection analysis.

第三部分介绍顺序注射化学发光联用技术测定DL-苹果酸的初步研究。

The experimental processes and methods of the direct fermentation of L-malic Acid by Aspergillus Species will be Summarized.

概述了用曲霉属的一些菌种的L-苹果酸直接发酵的实验过程和方法。

The target compound 1 was successfully prepared via esterification, reduction, bromization and cyanation processes by using L--malic acid (2), which is an inexpensive and easily available starting material. The overall yield was 56.7%.

以廉价、易得的L--苹果酸为起始原料，经酯化、还原、溴代和氰化四步反应得到目标化合物-4-氰基-3-羟基丁酸乙酯，合成总收率为56.7%。

A simple, selective and sensitive method was investigated for simultaneous determination of anions (SO2－4, Cl－, NO－3, F－) and cations (Na＋, NH＋4, K+, Mg2＋, Ca2＋) by single-column ion-exclusion-cation-exchange chromatography with conductometric detection. DL-malic acid-methanol-water was used as an eluent.

采用单柱离子色谱系统和电导检测的方法，首次以DL-苹果酸-甲醇水溶液为淋洗液，简便、有效地同时分离、检测了溶液中SO2-4、Cl-、NO-3、F-、Na+、NH+4、K+、Mg2+、Ca2+9种离子。

The optimal desalinating process based on the following condition: desalination was optimized at effluent pH 4.0, flow volume 4 BV/h. Under these conditions, the volume ratio of resin and effluent in which the concentration of Na+was less than 30mg/L was about 1:6,and the loss rate of malic acid was 18.94%.

最佳上柱条件为：pH4.0的果酸废液，体积流量选择为4 BV/h，Na+浓度低于30mg/L的料液与树脂体积比约为6：1，苹果酸损失率为18.94%。

In a product free of citric acid or citrates, for oral ingestion, the taste of arginine is counteracted by lactic, malic or adipic acid; in a formulation for tube-feeding, citric acid and citrates in a specified ratio controls the product's stability.

在不含柠檬酸或柠檬酸盐的用于口服的产品中，通过乳酸、苹果酸或已二酸来抵消精氨酸的味道；在用于管饲的制剂中，以特定比例的柠檬酸和柠檬酸盐控制产品的稳定性。

The effect of DL-malic acid concentration, methanol concentration, flow-rate of eluent and temperature on the retention time was studied.

研究了DL-苹果酸浓度、甲醇浓度、流速和温度对各离子保留时间的影响。

The magnesium oxide nanocrystallites were prepared by means of a sol-gel method with malic acid and magnesium nitrate as raw materials.

以苹果酸和硝酸镁为原料，采用溶胶-凝胶法制备了氧化镁纳米晶。

Dibutyl malate was synthesized from malic acid and butyl alcohol used solid superacid SO42-/TiO2 as catalyst.

以固体超强酸SO42-/TiO2为催化剂，以苹果酸和正丁醇为原料催化合成苹果酸二丁酯，并探讨了酸醇比、催化剂的用量、反应时间、带水剂等因素对酯化反应的影响。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。