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。
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。
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。
As an antioxidant, lycopene protects cell structures and DNA against the nefarious effects of free radicals-small particles that damage healthy cells and allow tumor cells to develop.
作为抗氧化剂，番茄红素可以保护细胞结构和DNA远离自由基的影响——自由基是一种会破坏健康细胞、使癌细胞扩散的微粒。
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。
"Free radicals — like the kind formed from sun exposure — damage the membrane of skin cells, potentially allowing damage to the DNA of that cell," says Heller.
“自由基(比如由阳光照射而形成的粒子)会损害皮肤细胞膜，更会对细胞DNA构成潜在的威胁。”Heller说。
Iron plays a very important part in the reactions in our cells that produce damaging free radicals, which glom onto cell membranes and DNA, and may translate into aging the cell.
而铁元素在我们的细胞中产生一种具有破坏性的，能渗透进细胞膜和DNA并老化细胞的物质的过程中扮演着重要的角色。
Experts think the toxic chemicals in smoke can damage the DNA in hair follicles and generate cell-damaging free radicals as well.
专家们认为香烟中的有毒化学物质灰损害毛囊中的基因，同时产生破坏细胞的自由基。
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。
Free radicals develop when atoms in the body's cells have unpaired electrons, which can lead to damage to different parts of the cell, including DNA.
自由基发生是当身体细胞中的原子有单电子，能导致包括DNA在内的细胞不同部分的破坏。
First, it increases the production of free radicals, highly reactive molecules that tear about sensitive cell components like DNA, causing premature cell death (apoptosis).
首先，造成自由基生成的增加，激活一些分子造成细胞中敏感物质如dna等的损伤，因而造成了细胞过早的凋亡。
Ellagic acid helps reduce free radical damage and protect the nuclei of cell DNA against damage.
柔花酸能有效对抗游离基，更深层保护细胞中的DNA。
Outside the cell DNA damage, is effective against free radicals and prevent skin aging.
外线对细胞dna的伤害，有效对抗自由基，防止肌肤老化。
Conclusion: Aloe can retard senility by which increases the capability of body anti-oxidation of free radical and relieves the damage degree of liver and spleen cell DNA.
结论：芦荟能提高机体抗自由基氧化损伤的能力，减轻肝、脾细胞DNA损伤程度，从而达到延缓衰老的目的。
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。
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。
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。
Antioxidants protect against free radicals, highly reactive atoms and molecules that can damage DNA and other important molecules in the cell.
抗氧化剂可对抗自由基，自由基是高活性的原子或分子，可损伤细胞中的DNA和其它重要分子。
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。
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。
Results SOD significantly reduced the rapid decrease of the cell viability and DNA chain fragmentation when treated with enriched uranium and markedly enhanced the free spermidine of PC12 cell. Concl…
结果SOD可抑制浓缩铀诱发细胞活性迅速下降及DNA链断裂，同时提高细胞内游离精脒含量。
Results SOD significantly reduced the rapid decrease of the cell viability and DNA chain fragmentation when treated with enriched uranium and markedly enhanced the free spermidine of PC12 cell. Concl…
结果SOD可抑制浓缩铀诱发细胞活性迅速下降及DNA链断裂，同时提高细胞内游离精脒含量。
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