查询词典 pathogen

Compared with classical cytotoxic T lymphocytes , NK cells are superior in the following aspects: NK cells are among the first cell types to be activated after intracellular pathogen stimuli, the activity of NK cells peaked between 1 to 3 days, retained during the first 7-10 days, and the T cells response emerged only after 7 days when the NK cell responses begin to decline; though comprising of only 10％-15％ of peripheral lymphocytes, NK cells mobilize most of the cell populations in a strong and high level response to different invasions, and act as key factors at early defense before a specific immune response could mount, while only certain clones were involved in T cell response; NK cells kill virus-infected or malignant transformed cells without pre-sensitization and without restriction by major histocompatibility antigen, which is usually a mechanism of immune escape to T cell recognition by virus-infected or tumor cells, thus NK cell in complementary with T cells play crucial roles in tumor and virus eradication.

NK细胞以其强大的细胞毒活性为特征，与细胞毒性T细胞相比，NK细胞具有如下特点：NK细胞虽然只占外周血淋巴细胞的10-15％，但是对刺激性因素产生应答的过程十分迅速，一次可以调动大多数细胞共同参与，而不是几个克隆的活化，免疫应答的强度高；病毒感染或恶性转化细胞的一个主要特征是细胞表达的MHCⅠ类分子下降或消失，并借助这一机制逃避特异性T细胞应答的识别，NK细胞介导的杀伤活性无需抗原刺激，不受MHCⅠ分子表达的限制，从而与T细胞应答互为补充发挥免疫防御的功能；NK细胞的免疫活性可以被多种细胞因子上调，其中IFNα，IL-2，IL-12，IL-15和IL-18具备更强的作用；NK细胞具有强大的细胞因子分泌功能，对于启动T细胞特异性应答必不可少。

It is the key factor regulating programmed cell death in pathogen,evocator and hormone responses.H_2O_2 has also been proved to play the signal role in defensive response to environmental stresses.H_2O_2 is known of directly regulating the expressions of numerous genes and some of these genes relate to plant defense and hypersensitive response.H_2O_2 also interacts with other signal systems,especially hormone signal system,and forms upstream or downstream components of hormone-mediated signal-transmitting passageways;more importantly,H_2O_2 also work to exert influence on or modify other secondary signals such as calcium signal between which and H_2O_2 many interactions take place;and both of these two signals regulate interactive tolerances of plants.

已知H2O2直接调节无数基因的表达，其中有些基因与植物防御和超敏反应有关。H2O2还与其它信号系统特别是激素信号相互作用，是激素介导的信号传导通路上的上游或下游组分；更重要的是H2O2还影响和修饰其它第二信使如钙信号的作用，在H2O2信号和钙信号之间发生众多的交互作用且这两种信号分子都调节植物对多种胁迫的交互耐性。

The region between the circular brown band generated by cell lipid exosmosis and the band of the wound in the non-transgenic cotton Z35's leaves, is wider than that of the transgenic cotton T-34's leaves, and no micro-HR was found in Z35, the intensity of leaves wilting is much serious, by contrast, micro BR was found around the wound region within the transgenic cotton leaves inoculated with the pathogen, but the micro-HR was not found in the transgenic cotton treated with water and around wound region of non-transgenic cotton Z35 leaves which showed that there was micro-HR defence in transgenic hpa1xoo cotton.

棉花黄萎病菌侵染叶片后，非转基因棉花叶部伤口周围细胞无微过敏性反应，受病原菌侵染的叶片萎蔫程度较重；转hpa1xoo基因棉花叶部伤口周围细胞有微过敏反应，叶部刺伤处仅有较小的坏死斑，且不相连，发病较轻，而清水处理的转基因棉花与非转基因棉花叶片中伤口周围均无微过敏反应，说明病原菌侵染诱导转hpa1xoo基因棉花产生微过敏防御反应，转hpa1xoo基因棉花较非转基因棉花有较强的抗病性。

BSL-3 laboratory acts as the essential location about the safety of experimentalist, public and testing camples in the course of the test of altitudinal unsafe microbial pathogen.

BSL—3实验室是从事高致病微生物试验活动中能够保证试验人员、公众和试验样品安全的必要场所。

The inhibiting effect of 13 fungicides on the pathogen of wheat sharp eyespot was tested in vitro. The results indicated that Diniconazole, Jinggangfmycin.

为了筛选小麦纹枯病的高效防治药剂，对多种化学药剂进行了室内毒力测定、盆栽试验和田间防效试验。

To evaluate if expression of Rs-AFP2 enhances the transgenic wheat resistance to Rhizoctonia cerealis, a major pathogen of wheat sharp eyespot, the transgenic wheat plants from T1 to T4 generations were subjected to R.

结果表明，Rs-AFP2在转基因小麦中能够稳定遗传，以单拷贝整合到小麦基因组中，遗传方式符合孟德尔遗传规律，并能在转录水平上表达。

Perina nuda virus ; infectious flacherie virus ; the viral silkworm disease ; cell line ; pathogen

指导教授王重雄；中文关键字榕树透翅毒蛾病毒；软化症病毒；家蚕病毒病；细胞株；病原体

By use of fluorescence microscopy and fluorescein isothiocyanate-labeled BCG, the ability of T-24 cells to take up the pathogen was also observed.

而且，BCG在体内的具体发挥作用的过程及BCG最后的命运也同样是值得关注的问题。

It has been shown that applying bio-pesticides such as Bt by means of pathogen-containing aerosolcreated by a pulsating fogger is feasible,which provide a new convenient way for implementing bio-control in forest on a large scale.

结果表明，脉冲式烟雾载药技术用于Bt生物农药的施放是可行的，这为今后在大面积森林实施生物防治提供一条简便的新途径。

"Hot Tub" Folliculitis is a condition caused by the pathogen pseudomonas aeruginosa.

"浴缸"毛囊炎是一种条件致病菌引起的绿脓杆菌。

Pradeep Indulkar, a senior official at the Maharashtra state Home Ministry say 101 human were killed and 287 injured.

马哈拉施特拉邦内政部高级官员Pradeep Indulkar称，有101人在冲突中丧生，287人受伤。

Mark Frei, a senior vice president of West, says 80% of West's homeagents have some college education, compared with 30% of those whowork in office-based call centers.

Frei说，该公司80%在家办公的人员都拥有本科学位，而在公司电话中心工作的人中只有30%拥有本科学位。