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In this study, the CPE processes of four different kinds of polyaromatic hydrocarbons, acenaphthene, anthracene, phenanthrene and pyrene, with two kinds of silicone surfactants, DC-193 and DC-190, were studied separately, and four different assisting methods for the phase separation of the CPE process including heating at a higher temperature, adding salts, centrifugation and stirring were introduced, respectively.

今利用两种聚醚型有机硅表面活性剂DC-193和DC-190，对蒽、菲、芘和苊四种多环芳烃进行浊点萃取研究，分别使用加热、加盐、离心和搅拌等辅助方法改变相分离过程的速度。通过测定表面活性剂富集相的体积百分率Vs/随时间的变化和最终的萃取率，研究上述四种不同辅助方法对相分离行为和萃取性能的影响。

The proteins and enzymes in saliva sample were removed by centrifugation and filtration of the mixture of acetonitrile and saliva sample.

将等体积的乙腈和唾液混合，然后通过离心和过滤的方法除去唾液样本中的蛋白质和酶。

Objective To prepare vinorelbine bitartrate liposome and compare the difference of the entrapment efficiency by using Sephadex minicolumn centrifugation method and cation exchange resin centrifugation method, respectively.

目的 制备重酒石酸长春瑞滨脂质体，比较葡聚糖凝胶微柱离心法和阳离子交换树脂离心法测定重酒石酸长春瑞滨脂质体包封率的差异。

The duration of centrifugation, the rotate speed of centrifugation in sucrose and the concentration of sucrose were tested.

分别对在蔗糖液中的离心时间、离心转速和蔗糖的浓度进行了单因素试验，并对效果较好的离心时间和离心转速进行了二因素组合设计试验。

An SCP powder called Provesteen, now on the market, is produced from a yeast that grows at densities similar to those achieved by centrifugation with ordinary strains. This means not only that centrifugation can be omitted, but also that there is no excess water to be recycled; the yeast goes right from the fermenter to a pasteurizer and a drier.

一种叫Provesteen的SCP粉末现在已进入市场，它能在一种从普通酵母离心分离后才能达到的密度条件下生长，这就意味着，它不仅可省略掉离心步骤，而且也不需要回收过量的水；这些酵母直接从发酵罐到巴氏消毒器和干燥器。

Roots as material, a tight tonoplast preparation with high purity was isolated by differential centrifugation and sucrose density gradients centrifugation.

根为材料，采用差速离心和蔗糖密度梯度离心法分离纯化液泡膜。

MSC can be obtained by percoll fluid and density gradient centrifugation, this cells kept proliferation and differentiation ability in vitro; MSC can differentiate into chondroblast by lightly centrifugation and chemical definition medium, after one generation, the differential cells kept the phentype of chondroblast, they are a kind of ideal seed-cells for cartilage tissue engineering.

经percoll液密度梯度离心法能获得纯度较高的人骨髓间充质干细胞，这种细胞在体外培养体系中保持旺盛的增殖能力；经轻度离心和化学限定培养基法可诱导骨髓间充质干细胞向成软骨方向分化，增殖旺盛，可传一代培养，是软骨组织工程理想的种子细胞。

The Schizosaccharomyces pombe plasma membrane H(superscript +)-ATPases are obtained by differential centrifugation, acid treatment and isopycnic centrifugation in a discontinuous sucrose gradient to study the effects of Ca(superscript 2+), CaM and CaM inhibitors on activity of purified plasma membrane H(superscript +)-ATPase.

经差速离心，酸处理，蔗糖密度梯度离心制备粟酒裂殖酵母质膜H-ATP酶，以研究Ca(上标 2+)、CaM以及CaM拮抗剂对纯化的质膜H-ATP酶活性的影响。

The rats were orally treated with referential ferulaic acid, Rhizoma Chuanxiong extraction and Naodesheng capsule repectively. Blood samples were collected by cutting rats tails. Plasma was separated by centrifugation at 10 000 r·min-1 for 10 min, and two-times methanol in volume was added to deposit proteins. After centrifugation, the upper liquid was transferred to filter. The concentration of ferulaic acid in serum was determined by RP-HPLC.

大鼠分别灌胃给予阿魏酸对照品、川芎药材提取物、复方脑得生片，断尾采血，离心，取血浆适量，加甲醇沉淀蛋白，取上清液过滤，用HPLC分析，以C18为固定相，流动相为甲醇-0.5%醋酸水溶液（30∶70），在320 nm检测阿魏酸血药浓度，3p97软件处理数据。

Through differential centrifugation and sucrose density gradient centrifugation,tono plast vesicles were isolated from suspension-cultured Populus euphratica cells broken by mortar and pestIe,blender or ultrasonic homogenizer.The sensitivities of H+-ATPase to NO-3,VO3-4 andNaN3,as well proton pnmping activities of membrane-bound pyrophosphatases demonstrated that tonoplast vesicles mainly distributed on the interface of 0％～25％of sucrose.

为进一步研究液泡膜及H+-ATP酶在胡杨抵御盐胁迫中所起的作用，比较了研磨、捣碎和超声破碎三种细胞破碎方法，从悬浮培养的胡杨细胞中制备液泡膜微囊的效果；并用差速离心和不连续蔗糖密度梯度离心纯化了胡杨液泡膜微囊。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。