A scientist showed that mouse leukemia could be transmitted by cell-free filtrates.
一位科学家发现小鼠白血病可以通过细胞游离滤液传播。
The results showed that both the cell-free extract and culture supernate from mouse SRS-82 cell line were leukemogenic.
结果表明SRS-82 株的无细胞提取液和其培养上清液的离心沉淀物皆具有致白血病活性。
Their translation activities were measured in a wheat germ cell-free system.
在麦胚无细胞体外翻译体系中测定了它们的蛋白翻译活力。
These data demonstrate that vanillin effectively scavenges PON in cell-free systems.
这些数据表明，在细胞香草有效清理无源免费制度。
However biochemists have achieved certain steps of the multiplication process in cell-free media.
可是，生物化学家已完成了在无细胞培养基上增殖过程的某些阶段。
This review deals with the diffusion properties of a species in the cell-free and cell-occupied carriers.
本文综述了对于组分在固定化细胞及其载体中的扩散性质的研究现状。
Objective:A mean concentration was shown by quantitative analysis of fetal cell-free DNA in maternal plasma.
提示母体血浆中游离的胎儿DNA 的定量分析在无创性产前诊断中有重要价值。
Methods The cell-free system was prepared by ultracentrifugation of Xenopus eggs and activated by cytochrome C.
方法超速离心制备非洲爪蟾卵无细胞体系，用细胞色素C激活为凋亡体系。
Lactobacillus cell-free enzyme with certain concentration could also improve the pasting properties of corn flour.
乳酸菌胞外酶在一定浓度下也可以改善面粉的糊化性质。
Quantitative analysis of fetal cell-free DNA in maternal plasma is of great value in the non-invasive prenatal diagnosis.
提示母体血浆中游离的胎儿dna的定量分析在无创性产前诊断中有重要价值。
Objective:To establish the new technology for detection of fetal cell-free DNA in maternal plasma at early pregnant stage.
目的：建立一种检测早孕妇女血浆中胎儿游离DNA的新方法。
Science, Medicine, and the Future: Cell-free fetal DNA and RNA in maternal blood: implications for safer antenatal testing.
科学，医学，面向未来：母血中无细胞的胎儿DNA和RNA：对安全的产前测试的影响。
Conclusions: Establish effective and steady technology for separating and extracting cell-free fetal DNA in maternal plasma.
结论：建立了有效和稳定地分离提取母血浆中胎儿游离dna的技术。
The establishment of cell-free systems is considered as one of the important advances in the field of cell biology in recent years.
非细胞体系的建立，被认为是近年来细胞生物学领域中的重要进展之一。
Cell-free protein synthesis has some advantages on protein expression and regulation, compared with traditional cell-based expression system.
无细胞蛋白质合成系统相比传统的细胞表达系统有许多优点，包括表达周期短、反应条件容易控制等。
METHODS: We developed an assay based on the targeted analysis of cell-free DNA for the detection of fetal aneuploidies of chromosomes 21, 18, and 13.
方法：我们开发了基于游离DNA定向分析的方法，用于胎儿21号、18号和 13号染色体非整倍体的检测。
The above findings suggest the presence of a crypt repair factor in cell-free filtratespyepared from the intestinal crypt cell suspension of normal mice.
本实验结果提示，在肠腺无细胞滤液中，存在着某种肠腺修复因子，它能促进受照射小鼠肠腺的修复再生。
It seemed that the nuclear reconstitution in Xenopus cell-free extracts is independent of not only the resources of exogenous DNA, but also the length of DNA.
实验结果表明，非细胞体系中诱导的核重建不仅与外源dna的种类无关，与外源dna的长度也没有关系。
Bianchi said she owns stock in Verinata Health, a company that is developing cell-free fetal DNA tests for Down syndrome, although that company had no role in the new study.
比安基说她在韦尔·纳塔健康中心持有股份，该公司正研发胎儿游离dna检测唐氏综合症。虽然该项公司尚没取得什么新进展。
Objectives: To establish the technology for extracting cell-free fetal DNA in maternal plasma, comparing detection rate of fetal component marker SRY gene and RASSF1A gene.
工作目的：建立母血浆中胎儿游离dna分离提取的技术，利用SRY基因和RASSF1A基因检测胎儿游离dna，并比较它们的检出率。
The improved performance with later gestation is likely attributable to the increased concentration of cell-free fetal DNA within maternal blood as the fetus and placenta develop.
在妊娠期较晚时的测试性能的提高可能与随着胎儿和胎盘的发育母体血液中无细胞胎儿dna浓度的增加有关。
The electrons knocked free at the surface of the cell, however, were not being carried away in this manner.
然而，电池表面的自由电子无法通过这种方式成为电流传出。
Fish oils decompose quickly and in the process unleash free radicals, which are linked to cell damage.
鱼油会很快分解，分解过程中释放出自由基，而自由基与细胞损害有关。
It contains chemicals called polyphenols that reduce the presence of free radicals, which cause cell and DNA damage.
他富含一种叫做多酚的化学物质，其可以减少自由基从而降低细胞和DNA损害。
But our kids are growing up in an age when long distance is free on their cell phones.
但我们的孩子则生长在打长途免费的年代。
By opting for a simpler phone and implementing some simple rules I've reduced my cell phone stress, one day hopefully I'll be cell phone free!
选择一款功能简单的手机，实践一些简单的规则，我的手机焦虑症已经减轻了不少。希望终有一日我能成为一个手机自由人！
Remember when it felt really special to get a free basic cell phone when you signed a two-year service contract?
还记得你如果签一个为期两年的服务合约，就可以得到一部免费的蜂窝电话的那种特别感觉吗？
Remember when it felt really special to get a free basic cell phone when you signed a two-year service contract?
还记得你如果签一个为期两年的服务合约，就可以得到一部免费的蜂窝电话的那种特别感觉吗？
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