乙腈

We found that the iodohydroxylation of 1-2-allenyl selenides with I〓 and water can smoothly proceed in aqueous MeCN at 0℃.

我们发现在乙腈水溶液中，1，2-联烯基硒醚可以和碘发生羟碘化作用，碘和羟基高度区域和立体选择性加成到1，2-联烯基硒醚的β，γ-位。

Methods: The protein and other impurity in the sample were precipitated by zinc acetate and potassium ferrocyanide after dipping of the sample. N,N-dichlorocyclohexylamine derived from sodium cyclamate by sodium hypochlorite in the filtrate was extracted by hexane. The HPLC separation was carried out with a phenomenex Gemini-C18 column using acetonitrile-water(7+3) or methanol-water (8+2) as mobile phase and detected by UV monitor at 314 nm. External standard method was used for quantification.

样品中甜蜜素浸提后，用乙酸锌和亚铁氰化钾试剂沉淀蛋白质等干扰杂质，过滤，用次氯酸钠将样品溶液中的甜蜜素转化为N，N-二氯环己胺经正己烷萃取后，在phenomenex Gemini-C18柱上，以乙腈－水(7+3)或甲醇－水(8+2)为流动相进行分离，HPLC-UV检测器在314 nm测定，外标法定量。

However, they can minimise the chances of this happening by releasing large amounts of a pheromone called phenylacetonitrile.

然而，他们可以通过释放被称之为苯乙腈的信息素，将这种情况发生的机率降低到最低水平。

Reaction mechanism and network are similar to that of base-catalyzed reactions of nitriles examined in less severe conditions.

近临界水中亚氨基二乙腈的水解反应机理和普通条件下碱催化水解反应机理相似。

Keywords near-critical water;self-catalysis;iminodiacetonitrile;iminodiacetic acid;hydrolysis

近临界水；自催化；亚氨基二乙腈；亚氨基二乙酸；水解

This work presents the study on the oxidation of TyrOH by SO·4- in water/ACN mixed media.

研究了水-乙腈混合溶液中SO·4-自由基氧化酪氨酸的反应。

Methods: into a series of 10 ml colorimetric tube were added different aliquots of the 1,8 -dihydroxyanthraquinone standard solution,2.0 ml of naac-hac buffer solution(ph=3.60),2.0 ml of ethylacetate.

于10.0 ml比色管中加入一定量的1，8-二羟基蒽醌标准溶液，ph值为3.60的naac-hac缓冲溶液2.0 ml，有机溶剂乙腈2.0 ml，最后定容至10.0 ml；同时做空白对照，在最大激发波长为440 nm，最大发射波长为521 nm处测定一系列溶液的荧光强度。

Mobile phase was acetonitrile-1% glacial acetic acid in water.

流动相为乙腈-1%冰醋酸，柱温为35℃，流速为1.0 ml/min，检测波长为254 nm，进样量为20μl。

Result The experimental results showed that ultrasonic extraction time was 30 min, temperature was 40℃, acetonitrile-water was used as the mobile phase and the column temperature was 30℃, the drift tube temperature of ELSD was 80℃ and the air flow rate was 2.00 L/min.

结果］最终确定超声萃取，其中，提取时间30 min，提取温度40℃，以乙腈－水为流动相，柱温30℃，蒸发光散射检测器漂移管温度80℃，载气流速2.00 L/min。

The optimum technical conditions were obtained as follows: the experimental drift tube at a temperature of 90 ℃, mobile phase of acetonitrile∶ water=70∶30, flow rate as 1 mL/min, nitrogen flow rate as 2.0 L/min, and a good separation of glucose and xylose in the hydrolysate.

实验条件优化得出在漂移管温度为90 ℃，流动相为乙腈∶水（70∶30），流速为1 mL/min，氮气流速为2.0 L/min条件下，经Shodex Asahipak NH2P-50(4.6 m×250 mm，5 μm)色谱柱后，可以将水解液中的主要糖成分葡萄糖和木糖进行良好的分离。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。