查询词典 purity

The plum tree, therefore, in particular, symbolizes purity of character, the purity that we find in the crisp, cold winter air.

所以，梅树特别象征着清洁的性格，那种清爽的、寒冷的冬天空气所具有的清洁。

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。

We put forward a new viewpoint that the purity of seed selection keeps the balance with the DNA polymorphism demand. The research aim at oak silkworm seed selection was to determine how to keep the balance between improving cultivar purity and keeping the genetic diversity within cultivar.

对品种选育的纯度与DNA多态性需求的平衡进行了讨论，并分析了对柞蚕品种选育的启示，提出了柞蚕品种选育的下一步的研究目标：寻找提高品种纯度与保持品种内的遗传多样性的平衡点。

The enterprise can be formed as annual production of polycrystalline silicon 1.3 billion, High-purity silicon tetrachloride 1 thousand tons,φ6"—φ12" polishing flake 2.3 million flake, Silicon extension flake 500 thousand flake, SOI silicon Flake 400 thousand flake, all sorts of zone melting grinding silicon flake 3 million flake, High-purity metal and its compound products 100-150 T/year.

十一五&末期，该企业将形成年产多晶硅130吨、高纯四氯化硅1000吨、φ6&—φ12抛光片230万片、硅外延片50万片、 SOI 硅片40万片、各类区熔硅磨片300万片、高纯金属及其化合物产品100—150T/年的生产能力，并将与新兴硅业、乐山安森美等企业形成完整的硅产品产业链和高纯金属产业基地。

Study it is tall purity, OK to fight eroded vitreous kiln to use actor * qualitative silica brick so the service life that prolongs vitreous kiln on certain level. 1 experiment develops vitreous kiln to be handpick and high grade raw material with the main avenue of high grade silica brick, the purity; that the alkalescent oxide content that in reducing raw material, takes will come to raise silica brick deserves to compare through adjusting raw material grain, apparent pore is reduced to lead when shaping in order to raise compact sex, achieve fight erode the effect.

所以探究高纯度、抗侵蚀的玻璃窑用优*质硅砖就可以在一定程度上延长玻璃窑的使用寿命。1试验研制玻璃窑用优质硅砖的主要途径为精选优质原料，降低原料中带入的碱性氧化物含量来提高硅砖的纯度；通过调整原料颗粒配比，成型时降低显气孔率以提高致密性，达到抗侵蚀效果。

A method for making Bisphenol A with a purity of more than 99.7% by reacting phenol and acetone using an acid catalyst, separating a BPA-phenol adduct by crystallisation and removing phenol from the adduct, in which involves continuous suspension crystallisation with a total dwell time of more than 4 hours in at least 3 crystallisers, by cooling first to 50-70 C in two parallel crystallisers and then to 40-50 C in a third crystalliser connected in series with the first two.; A method for the production of Bisphenol A with a purity of more than 99.7%, by reacting phenol with acetone in presence of an acid catalyst, separating a BPA-phenol adduct from the product mixture by crystallisation, filtration and washing, and removing the phenol from the adduct, in which stage involves continuous suspension crystallisation in at least three crystallisers connected in such a way that the mixture is first cooled to 50-70 C in two crystallisers in parallel and then cooled to 40-50 C in a third crystalliser in series with the first two, the total residence time of the mixture over all crystallisers being more than 4 hours.

描述用于生产纯度大于99.7％的双酚例如，双酚A(BPA的方法，这种方法包含苯酚和丙酮在有酸性催化剂参与的情况下反应形成一个包含双酚的产物混合物；通过结晶、过滤和洗涤从该产物混合物中以双酚/苯酚复合物的形式除去至少一部分双酚以提供双酚A/苯酚复合物晶体；并且从双酚/苯酚复合物晶体中除去至少一部分的苯酚以提供纯度大于99.7％的双酚；其中结晶过程包括连续的混悬液结晶，并且是在至少三个结晶装置中进行的，装置的排列使得产物混合物首先在结晶过程的第一阶段在第一个结晶装置和并联的第二个结晶装置中被冷却到50至70℃的温度，随后在结晶过程的第二阶段在与第一和第二个结晶装置下游串联的第三个结晶装置中被冷却到40至50℃的温度，并且其中产物混合物在结晶过程中的总驻留时间在4小时以上。

Seed purity can be tested easily as long as one primer of the last two types by RAPD; as to the first two types primers, two primers from both of them must be employed to test seed purity by RAPD.

利用一个互补型或杂合型的随机引物便可对杂种进行RAPD纯度鉴定，而另两种类型则须两个以上的引物才能得到可靠的鉴定结果。

An Nd:YAG Q-switched laser operating at a wavelength of 266 nm, a pulse duration less than 10 ns, and a repetition rate of 10 Hz, was used to ablate a ZnO target of 99.9% purity.

所使用的光源为Nd：YAG Q-switched雷射，其波长为266 nm、脉冲宽度小於10 ns、重覆频率10 Hz；使用的靶材为纯度99.9％的氧化锌。

Results The appearance of negative value was due to insufficient reagent purity, finding out in original absorption curve. The reagent contained chemicals besides response theory.

结果 从原始吸光度值的曲线上找到出现负值的原因是试剂纯度不够，试剂中含量有反应原理以外的化学物质。

The purity identification was made by SDS-PAGE,absorption spectrum and amino acid analysis.

SDS-PAGE电泳结果显示提取纯化的Ⅱ型胶原蛋白与S igm a公司的产品一致。

I go to school at night.

我是上上学。

Clear Tip Nasal Aspirator: A soft time and gentle suction action makes removing excess mucus easy.

鼻吸明确提示：一个柔软的时间和温柔吸力行动使消除过剩的粘液容易。