提纯

Analyses of pH, conductivity, and dissolution of silica were carried out in order to study the purification of Stber silica sols.

通过pH值、电导率和二氧化硅解离量的测定，研究了Stber二氧化硅溶胶的提纯过程。

Analyses of pH, conductivity, and dissolution of silica were carried out in order to study the purification of Stober silica sols.

通过pH值、电导率和二氧化硅解离量的测定，研究了Stfber二氧化硅溶胶的提纯过程。

Government officials say the factory's smelter distilled lead ore into 5,000 tons a year of lead ingots and dumped the waste in unsafe slag piles.

政府官员表示，该工厂的熔炉每年提纯铅矿石5，000吨生产铅锭，废料由不具安全保障的熔渣管排出。

Additionally, polysome immunoadsorption technique was used to partially purify a small amount of specific mRNA which directed in vitro synthesis ...

另外，用多聚核糖体免疫吸附技术提纯了少量B_(23)mRNA，它在体外转译系统中也指导合成了分子量约为37，000道尔顿的蛋白质。

objective to explore plasmid dna extraction and purification methods as well as measure plasmid dna.

目的 探讨提纯质粒dna的方法并进行检测。

Pericarps activated carbon have large domestic manufacturers of activated carbon, production of non-stereotyped porosity developed a series of activated carbon, surface area, wear-resistant high strength, the use of long cycle, rinse the characteristics of the time is short, widely used in pure water, high water Purification, medicine, food, industrial water treatment, air purification, MSG purification and other fields.

活性炭有国内大型果壳活性炭生产厂家，生产的不定型系列活性炭具有孔隙发达，比表面积大，耐磨强度高，使用周期长，冲洗时间短等特点，广泛用于纯净水，高纯水净化，医药，食品，工业水处理，空气净化，味精提纯等各个领域。

Recrystallization and filter under reduced pressure were used .

然后，本文还探讨了L-丙交酯的提纯方法。

The extraction technical of pumpkin seed oil and the separation purification of Unsaturated fatty acid were optimized.

本研究选用中国南瓜、印度南瓜、美洲南瓜和黑籽南瓜共计17个品种，分别对其种子的形态特征和营养成分进行了研究，并对南瓜子油的提取工艺及多不饱和脂肪酸的分离提纯进行了优化。

I plant the production of high-purity quartz sand mining on their own quartz stone from the processing of raw materials, we have a unique purification technology and techniques, will quartz in potassium, sodium feldspar, mica and other metal ions from the exact chemical products Purity, physics, and optical properties of the 34 crystal-standard in the country is a unique product, and formed a large-scale production line the cause of 5,000 tons of annual output.

我厂生产的高纯石英砂是以自己开采的石英石为原料加工而成的，我们采用独特的提纯技术和工艺，将石英中的钾、钠长石，云母及其它金属离子分离确实产品的化学纯度、物理、光学性能达到三四级水晶石的标准，在国内属独一无二的产品，并形成了大规模的事业生产线年产量5000吨。

There are generally two main drawbacks in the currently reported methods of dissolving wool, one of which is the low efficiency of dissolving fibers; only the wool keratin solutions with low concentration, low viscosity, relatively low molecular weight and low conversion rate have been obtained; the other drawback is, as mentioned in many patents, the wool keratin solution needed to be concentrated, purified, and coagulated into wool keratin powder, through back-permeation, dialysis techniques, in order to facilitate the application in the subsequent processes.

目前研究报道的羊毛纤维溶解方法都普遍存在有两个主要缺陷：其一是对纤维的溶解效率低，只能获得低浓度、低粘度、较低分子量、低制成率的羊毛角蛋白质溶液；其二则是因浓度低而在多数专利中需要通过反渗透、透析方法使溶液浓缩、提纯、固化成羊毛角蛋白质粉末，以方便后续加工使用。

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。。。。