查询词典 sieve

Sieve element A vascular cell in the PHLOEM, whose function is to transport sugars and other nutrients from the site of production to the site of utilization or storage.

筛分子：植物韧皮部的管状细胞，其功能是将糖类和其它营养物质由产生地运送至被利用或储存的地方。

Objective To observe the influence of gene transfection of inducible nitric oxide synthase to the transplanted human laryngeal squamous carcinoma in nude mice, to investigate the expression and the correlayion of iNOS and p53, and to proke into the possible apoptosis mechanism. Methods Transfect the gene of iNOS to Hep-2 human laryngeal cancer cell, sieve out positive clone cell and amplify.

目的 观察诱生型一氧化氮合酶(inducible nitric oxide synthase， iNOS)基因转染对人喉鳞癌细胞裸鼠移植瘤生长的影响，研究在体人喉鳞癌细胞中iNOS与突变型p53基因的表达，探讨二者的相关性及促进肿瘤细胞凋亡的机制。

Compared with the pure AlPO 4-5 molecular sieve, the unit cell volume of Cr-AlPO 4-5 expanded and its skeleton vibration peaks in FT-IR spectra shifted to low wavenumbers.

但是 ，由于苯环上共轭大π键所产生的化学稳定性，使得苯在温和条件下难于发生反应；因此，必须选择高活性的催化剂。

Inaddition,we extract total RNA from cultural U251 cell of humanglioma,make coding gene extron amplification of TfR through ReverseTranscription-Polymerase Chain Reaction,construct expressionplasmid of pCDNA3.1-TfR after digestion of enzyme andconjunction,do transfection to U251 cell by liposome afteridentification,cause excess expression,detect the efficiency of transientexpression of TfR protein by pEGFPN1-TfR, sieve positive cell ofpCDNA3.1-TfR through G418, choose positive cell clone, detect theexpression of TfR in anteroposterior period through Western blot,FCM,cell immunochemistry and mRNA through RT-PCR, identify the effect of transfection.

另外，培养人脑胶质瘤U251细胞，进行细胞总RNA抽提，运用RT-PCR方法进行TfR基因的完整编码区外显子的扩增，经过酶切、连接后构建pCDNA3.1-TfR的表达质粒，鉴定正确后按脂质体转染方法转染人胶质瘤U251细胞，使其过量表达，通过pEGFPN1-TfR检测其瞬时转染的效率；用G418对稳定表达pCDNA3.1-TfR的细胞进行筛选，挑选阳性细胞克隆，运用Western blot、流式细胞检测技术和细胞免疫化学以及mRNA半定量的方法检测TfR在转染前后的表达水平，鉴定转染的效果。

Design and Analyze of Amplitude Photon Sieve Based on Angular Spectrum Method .

基于角谱法的振幅型光子筛的设计和分析。

Moreover, a birthday sieve method is introduced to decrease the complexity of the precomputation.

而且，引入一种新的生日筛法以降低预计算的时间复杂度。

Stemming from the water sieve analysis method, a test method of CPA was proposed.

由水筛法得到启示，提出了一套水泥净浆结粒的检测方法。

Objective: To study the Cefoxitin disk diffusion method sieve Methicillin-resistant Staphylococcus aureus method.

目的：研究头孢西丁纸片法筛选耐甲氧西林金黄色葡萄球菌的方法。

Stemming from the washing sieve, a test method of cement paste agglomeration was proposed.

由水筛法得到启示，提出了一套水泥净浆结粒的检测方法。

The X-type molecule sieve membrane prepared in the method is thin and has good continuity and few defects.

该方法制备的X型分子筛膜薄且连续性好，缺陷少。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐