阴性

When Shigella flexneri 2a 2457T is cultured at 30℃, it's phenotypically avirulent; when grown at 37℃, its virulence improves greately. There is clear evidence that the temperature-dependent expression of the virulence genes is controlled by H-NS protein.

痢疾杆菌在30℃时不具有侵袭力，37℃时毒力明显增强，已有的研究表明这种依赖于温度的毒力基因的表达受H-NS蛋白的调控。H-NS是一种重要的类核相关蛋白，在革兰氏阴性菌中普遍存在，能够调控大量基因的表达。

The compressive strength, anti-tensile and rotation strength of the scaffolds were measured by almighty vitodynamics machine. 2、To make biologic safe test of nano-zirconia calcium phosphate scaffolds in vivo and vitro with polyethylene as a negative control and phenylic alcohol of 6.4% as positive control, include cell toxicity test, systemic acute toxic test, hemolysis test, the cytotoxicity and histocompatibility of the scaffolds were evaluated to offer valuable theoretical evidence for clinical safe application.

万能生物力学机测定骨支架的压缩强度、抗拉伸强度和旋转强度。2、以聚乙烯做阴性参照材料、6.4%苯酚溶液做阳性对照材料，对纳米氧化锆/磷酸钙骨支架进行了体内、外生物安全性试验研究，包括细胞毒性试验、全身急性毒性试验、溶血试验，评价其细胞毒性、组织相容性，为确保该材料临床应用的安全性提供有价值的理论依据。

Repelled by light;exhibiting a negative phototactic or phototropic response .

避光的，怕光的被光排斥的；表现为阴性趋光的或趋光反应的

Lift again as phthisical incidence of a disease, n/med tuberculosis of the film inside bronchus also is added gradually much, because n/med tuberculosis of the film inside bronchus is inchoate the symptom is not typical, phlegmy bacterium examination often is negative, bosom X line, CT does not have diagnostic sex sign again, reason hard make a diagnosis and give treatment.

概要： 随着肺结核发病率再次升高，支气管内膜结核也逐渐增多，支气管内膜结核因早期症状不典型，痰菌检查常为阴性，胸部X线、CT又无特征性征象，故难以诊治。

Xanthomonas campestris is a gram-negative bacterium, phytopathogenic to cruciferous plants.

Xanthomonas campestris是一种格兰氐阴性菌，对於十字花科植物会造成感染。

He banana samples from main cultivars Musa AAA Cavendish and Musa ABB Pisang Awak in Hainan Island were detected by ID-ELISA, TAS-ELISA, PCR and IC-PCR methods depending on the established detection system.

AS-ELISA和IC-PCR检测结果显示：92个样品BSV的检测结果均为阴性，说明这些被检测样品中可能不含有游离BSV粒子；PCR方法检测结果显示：27个样品呈阳性。

The work is both masculine (combining a pixilated computer generated image with military uniforms) and feminine (with sewing and details of buttons and embroidery).

此作的性格，既是阳性的(组合了军服材料和电脑产出的点状图像)，同时也是阴性的(充满了缝纫的痕迹和钮扣、刺绣等细节)。

Methods Routine immunization of BALB/ c mice by a tansfected cell line 293T/ B7-H4 as antigens.Then the immunized spleen was fused with SP2/0,a kind of plasmocytoma cells, and screen the positive clones by FCS with the 293T/B7-H4 as a positive control while 293T/ mock as the negative control.

以高表达人B7-H4分子的基因转染细胞株293T/B7-H4为免疫原，常规免疫BALB/c小鼠，采用B淋巴细胞杂交瘤技术进行细胞融合，并以该基因转染细胞293T/B7-H4作为阳性筛选细胞，以转空质粒的对照细胞293T/Mock作为阴性对照细胞。

Despite improvements of therapy, polymicrobial septicemia is increasingly being observed, and gram-negative bacteremia and candidemia represent significant causes of mortality in critically ill hospitalized patients.

尽管目前治疗感染的措施已有很大提高，但多种微生物混合感染的发病率仍在逐渐增多，革兰阴性菌和白色念珠菌感染仍然是住院危重病人的重要致死原因。

For the sake of simplicity, the culture was deemed polymicrobial if at least 3 different bacterial species grew out and if the species were of 2 different types (i.e., gram-negative vs. gram-positive, aerobic vs. anaerobic).

简单起见，培养结果假如有3种不同细菌生长或有两类细菌（如格兰阳性和革兰阴性，需氧菌和厌氧菌），这种结果被人为是复合感染。

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