醋酸

We will spend this class period beginning first with an introduction to the principles of TEM, an overview of the King laboratory's microscope (a JEOL 1200EXII), and conclude by having you operate the microscope and view isolated phycobilisomes negatively stained with uranyl acetate.

我们将从介绍透射电镜的原理开始这节课的学习，然后概述 King 实验室的显微镜(a JEOL 1200EXII)，最后通过让大家操作显微镜和观看用醋酸铀负染的离体藻胆体来总结本课。

Detected by sweet and sour, sometimes vinegary smell and taste along with a sharp feeling in the mouth.

检测糖醋，有时醋酸嗅觉和味觉随着尖锐的感觉，在嘴里。

If there is an excessive amount of acetic acidity, the wine will have a vinegary smell and be a flawed, acetic wine.

葡萄酒中含有的醋酸量不能超出一定的范围，最起码不能让葡萄酒闻着像醋。

Ethyl Acetate: A sweet, vinegary smell that often accompanies acetic acid.

乙酸乙酯：一种美好的酸味，经常伴随着醋酸一起出现。

Acetic: Tasting term indicating an undesirable vinegary smell.

醋酸的：一个用来表述不愉快酸味的品尝术语。

Body. The character imparted to a wine which is rich in dry extract, vinous and complete.

醋酸的酒体：提取物丰富、酒性饱满、完满的葡萄酒所具有的特征。

This article studied dispersion polymerization of the vinyl acetate in alcohol/water medium, choose potassium persulphate-sodium bisulfite as oxidized-reduction initiator.

研究了醋酸乙烯酯在醇／水介质中以过硫酸钾－亚硫酸氢钠为氧化－还原引发剂的分散聚合。

METHODS By the means of viscometry , the effects of reaction time , chitosan and acetic acid concentration on the hydrolytic velocity of chitosan by ultrasonic wave were investigated .

采用粘度测定法，探讨了超声波辐射时间与壳聚糖粘度的关系以及壳聚糖的浓度，醋酸的浓度对降解速度的影响。

The results show that a little amount of heteropolymolybdovanadophosphate can remarkably speed the degradation, the best conditions of the oxidative degradation of chitosan with hydrogen peroxide catalized by heteropolymolybdovanadophosphate in homogeneous condition are as follows: the ratio of catalyst and chitosan is 1 to 10, concentration of hydrogen peroxide is 0.15%, the temperature is 80℃, reaction time is 2h. 0.2g chitosan was degraded under the best condition and the molecular weight by viscometry was degraded from 1460000 to 7812. then water-soluble chitosan was obtained by this method; The heterogeneous method is a high efficient way, the best condition of this method are as follows: the ratio of catalyst and chitosan is 2 to 100, the volume of 30% hydrogen peroxide is about 3mL, the temperature is 90℃, reaction time is 5min～30min.

研究结果表明，适量磷钼钒的存在可显著加速壳聚糖的降解，磷钼钒催化过氧化氢均相氧化降解壳聚糖的适宜反应条件是：催化剂与壳聚糖的质量比为1∶10、过氧化氢百分浓度为0.15％、反应温度为80℃、反应时间为2h，在此条件下对0.2g溶解在100 mL 0.5％稀醋酸中的壳聚糖进行降解，可使壳聚糖的粘均分子量由原来的146万下降到七千多(7812)，成为水溶性低分子量壳聚糖，从而达到应用的要求；在异相条件下以磷钼钒为催化剂催化过氧化氢氧化降解壳聚糖是一种高效快速的方法，此法降解壳聚糖的最佳反应条件是：催化剂与壳聚糖的质量比为2∶100；30％过氧化氢的用量为3mL左右；反应温度为90℃、反应时间为5min～30min。

" Acetylcholine: Ester of choline and acetic acid, a neurotransmitter active at many nerve synapses and at the motor end plate of vertebrate voluntary muscle s."

乙醯胆碱：胆碱和醋酸的酯，是许多神经突触和脊椎动物肌肉运动神经终板的神经介质(在重症肌无力里，这种活动停止)。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。