NIH 3T3 cells were transfected by human papillomavirus 18(HPV 18). HPV 18 DNA as donor and calf thymus DNA as vector. Calcium phosphate technique was used.
以HPV-18 DNA为供体、小牛胸脉DNA 为载体，NIH3T3细胞为受体细胞，应用磷酸钙沉淀法将供体DNA 引入细胞内，得到了清晰的NIH 3T3细胞形态学转化灶。
Those chosen, who are aged between 18 and 73, will undergo a day of tests at sea level, to establish their metabolic baselines and have their DNA sampled.
被选定的人(年龄在18到73岁之间)将在海平面高度作一系列的测试，建立他们的代谢状况档案，并进行DNA采样。
Professor Montgomery says in his foreword to the report that the DNA profiles of over three-quarters of young black men between 18 to 35 are recorded on the database.
Montgomery教授在报告前言中说，18岁到35岁年轻黑人男子中有超过四分之三的人在数据库中留有DNA样本。
It found microbes with 18 million different DNA sequences, suggesting there could be millions of species although only a few thousand have been described.
结果寻找到了1,800万个不同的DNA序列，说明了其中可能会有数以百万计的不同种类微生物，而目前被描述的微生物种类仅仅只有数千种。
In this experiment, phylogenetic relationships of 18 species of passerines were studied using Adenylate Kinase Intron 5 (AK5) sequences and DNA techniques.
实验采用核蛋白激酶基因内含子5（AK5）和DNA测序法来分析这18种鸟的分子系统发育关系。
This is because the humans that were seeded from Sirius held DNA from 18 other creations that this is so.
这是因为起源于天狼星的人类持有了从18个其他造物主所带来DNA的缘故。
They were asked to name 10 places in their homes they had touched in the preceding 18 hours, and researchers used DNA tests to hunt for rhinovirus.
他们被要求说出在屋里18个小时之内接触的10个地方，然后研究人员通过DNA测试来捕捉这些病菌。
Methods The mutation of mitochondrial DNA from all 18 family members of a chinese pedigree with maternally inherited aminoglycoside antibiotic-induced deafness was detected by PCR and DNA sequencing.
方法应用PCR和DNA序列分析技术，对一个有明确氨基糖苷类抗生素应用史的母系遗传耳聋家系共18人（包括聋人和听力正常者）的线粒体DNA进行研究。
Methods DNA ploidy analysis was made by laser scanning cytometry in 18 tumor lesions of the vocal cord, and the patients were followed up.
方法对18例声带肿瘤性病变做激光扫描细胞DNA分析并进行随访。
CONCLUSIONS: The extent to which free fetal DNA testing can be applied as a universal screening tool for trisomy 21, 18, and 13 depends mainly on assay accuracy and cost.
结论：胎儿游离dna检测作为21三体、18三体和13三体的通用筛查工具的程度，主要取决于测定方法的准确性和成本。
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。
Results For 18 nasopharyngeal carcinoma patients, positive rates of EB virus DNA in plasma and leucocytes were 61%(11/18);
结果18例鼻咽癌患者外周血血浆和白细胞检测EB病毒DNA的阳性率相同，均为61%（11/18）；
Results For 18 nasopharyngeal carcinoma patients, positive rates of EB virus DNA in plasma and leucocytes were 61%(11/18);
结果18例鼻咽癌患者外周血血浆和白细胞检测EB病毒DNA的阳性率相同，均为61%（11/18）；
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