查询词典 mutation

To study these mechanisms, non-manifesting DYT1 mutation carriers (nmDYT1) and presymptomatic HD gene carriers, as well as age-matched controls were scanned with FDG PET in the resting state, and 15O-labeled water PET while performing a motor sequence learning task and motor execution task.

为 了研究这种机制，我们利用氟去氧葡萄糖 PET 扫描技术和 15O 标记水 PET 技术，对非显性 DYT1 突变携带者( nmDYT1)、未发生临床症状的 HD 基因携带者以及同龄对照在静息期和执行运动顺序学习任务以及运动原执行任务期间进行检测。

Lai favour says, pharmacy company Ceng Hua is gigantic endowment ongoing hair domain, had a large number of research that concern with the cell to develop new drug, also explored the mechanism that includes the field such as bacterium, virus, gene at the same time, these live about the cell, death, mutation, progenitive research also can use Yu Qingjie the sources of energy to develop.

莱恩说，制药公司曾花巨资在研发领域，为了开发新药进行了与细胞有关的大量研究，同时也探索了包括细菌、病毒、基因等方面的机制，这些关于细胞生存、死亡、变异、繁殖的研究也可以用于清洁能源开发。

Ion implantation ; Protopectinase ; Mutation ; Screening ; Breeding ; Fermentation process

离子注入；原果胶酶；诱变；筛选；育种；发酵

At the same time, the information of flax biotechnology of anther culture, haploid breeding, utilization of somatic mutation, protoplasmic culture, gene transformation were introduced in detail.

从亚麻花药培养、单倍体育种、体细胞无性系突变体的利用、原生质体培养、转基因技术的研究等方面详细地介绍了我国亚麻生物技术的发展状况。

Twenty-eight prototrophic revertants of the tryptophan auxotrophs were obtained through spotaneous back mutation from colonies grown on synthetic medium plates or nodules of plants. Most of the revertants have resumed the nodulation abilities and enhanced nitrogen fixation activities as evidenced by darker green color, higher dry weight and more nitrogen contents in shoot than those of the wild type strain 8-1-4A did in pot experiments. However, noodulation abilities decreased to some extent and no significant differences were found in the mass of nodules compared with the parent strain.

通过自发回复突变，从培养平板和根瘤中分离到28个色氨酸原养回复突变型菌株，对其中25株进行植物盆栽试验证明其中24株菌的结瘤功能得到了恢复，而且固氮酶活性普遍比出发菌有所提高，其中41％达到极显著水平，18％达到显著水平，植株地上部分干重及含氮量也有不同程度的提高，唯有根瘤数比出发菌有所降低，其中23％降低达极显著水平，11％降低达显著水平。

Background and Objective Pseudohypertrophic muscular dystrophy is a kind of lethal X-chain recessive inherited disease. The etiological factor is mainly due to gene mutation of Xp21 which induce the structural and functional abnormality of a kind of cell skeleton protein: dystrophin.

背景和目的假肥大型肌营养不良症(pseudohypertrophic muscular dystrophy，PMD)是一种常见的致死性X-连锁隐性遗传病，病因主要是由于X染色体短臂2区1带(Xp21)的基因突变而导致一种细胞骨架蛋白——抗肌萎缩蛋白的结构和功能异常所致。

Methods: HPV 16/18 infection was detected by nested-polymerase chain reaction, the p53 mutation was detected by direct sequencing, and the p53 and the HPV 16/18 E6 proteins were studied using immunohistochemistry on 129 pterygial specimens and 20 normal conjunctivas.

本研究利用巢叠式聚合脢锁反应分析自129例罹患翳状赘肉之翳状赘肉组织及20例正常无翳状赘肉的结膜组织检体中，是否有人类乳突病毒16及18型的感染，并利用直接定序的方式检测p53基因是否发生突变，此外亦以免疫组织化学染色法侦测p53蛋白与人类乳突病毒E6蛋白。

Studies of molecular genetics have demonstrated that retinoblastoma susceptibility gene is closely related to the development of retinoblastoma and the theory of Rb gene mutation or inactivation has been putatively proven to be the molecular mechanism of RB formation.

本研究以我国培养建立的一株RB细胞系〓及裸鼠为实验材料和对象，在对〓细胞抑癌基因（Rb基因、p53基因）表达状况进行检测和鉴定的基础上，通过建立裸鼠玻璃体腔RB常位异种移植模型，构建Rb基因的逆转录病毒表达载体，以脂质体介导的Rb基因转移方式，进行RB体内基因治疗的实验研究，观察Rb基因在体内对RB的治疗作用及影响因素，并探讨其作用机制。

Abstract］ Objective: To provide a suitable fungal material for protoplast-mediated genetic transformation and mutation induction of Pythium guiyangense Su.

目的：建立贵阳腐霉原生质体的制备和再生系统，为该菌的基因工程和细胞工程改良提供适宜的真菌状态。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。