查询词典 mutation

Build database of edaphic nutrient space, mutation of hand-in-hand travel space is analysed, already became the premise that advances essence of life to allow agriculture to carry out and basis.

概要： 建立土壤养分空间数据库，并进行空间变异分析，已成为推进精准农业实施的前提和基础。

Objective To investigate the mutation of Cx32 gene, clinical and electrophysiological features of Chinese patients with Charcot-Marie-Tooth disease.

目的 分析X连锁腓骨肌萎缩症患者Cx32基因的突变及其临床表现和电生理特点。

Methods Systematic observations of clinical manifestations,hematopoietic function,chromosomal aberrations,immunologic neurological,endocrinological,reproductive functions,eye examination,asssay of HPRT gene mutation and detection of oncogenes were performed in the past six years.

持续6年对患者进行临床表现、造血功能、染色体畸变、免疫功能、神经系统、内分泌功能、生殖功能及眼晶体等检查和HPRT基因突变及某些癌基因检测。

This kind of sequence indicated the mutation of sedimentary environment of the epicontinental sea basin.

关键 词：矿产普查与勘探；事件成煤作用；暴露沉积；海侵沉积序列

In other words, researchers have to prove that the disruption of this function, either genetically through mutation, or epigenetically through DNA methylation or chromatin modification, causes the initiation or progression of cancer.

换句话说，研究人员必须证明这些功能的中断，或者是通过遗传上的突变，或者是通过表观上的DNA甲基化或染色质修饰，导致癌症的发生以及进一步恶化。

Low energy ion implantation technology was used in mutation breeding of Hericium erinaceus.The growth speed of the Hericium erinaceus hypha is as an index to study the influence of the pulse lasting time of N~+ ion implantation.

利用低能离子束生物技术对猴头菌进行诱变选育，通过分析N+离子注入后猴头菌丝体的生长速度，研究脉冲时间对N+离子注入猴头菌丝体的影响。

Moreover, no significant changes in flagellar mobility, biofilm formation and production of extracellular cellulase and xylanase in vitro were observed in △rbfCxoo compared to PXO99A. Most importantly, the deletion mutation of rbfCxoo resulted in enhanced virulence and gene expression.

此外，△rbfCxoo鞭毛运动性、生物膜形成和胞外纤维素酶和木聚糖酶活性都无明显改变，但对水稻的致病性显著增强，毒性相关基因的表达也有所增加。

However, follicular variant of papillary carcinoma has a much lower frequency of mutation.

但是，滤泡型乳头状癌的突变率却罕见。

60Co-γray was a useful mutagen in induced mutation breeding .After treated with 60Co-γray ,free-living conchocelis of wild Porphyra haitanensis were induced and represented in offsprings. Purple mutant and excellent practical characters strains were selected from a lot of gametophytic blades. Single cell clone and enzymolysis were used to propagate fast in pure strains of induced mutations.

坛紫菜野生丝状体经一定剂量60Co-γ射线辐照后，子代叶状体发生了变异，经大量培养后筛选出紫色突变体（3号Ⅰ）和经济性状优良的个体（7号Ⅰ和7号Ⅱ），通过体细胞酶解和单克隆技术快速获得诱变选育纯系，并对其主要经济性状进行了研究。

2N gametes are the result of meiotic mutation during micro- and mega-sporogenesis that bear the sporophytic rather than the gametophytic chromosome number. This paper reviewed the genetic markers including the morphologic, cytological, isozymes and DNA markers, which have been employed in the generation, inheritance, heterozygosity and marker-assisted breeding of 2n gametes based on the frequency of large pollen grains, cytological analyses, unexpected occurrence of polyploidy progeny and the associations between parents and progenies.

文章综述了植物2n配子发生及其遗传标记研究现状，论述涉及有关形态学标记、细胞学标记、同工酶标记乃至DNA标记等遗传标记在2n配子研究中的应用，指出通过花粉形态观察、大小孢子母细胞减数分裂行为观察、杂种后代倍性鉴定以及亲子分子标记相关分析等，对2n配子发生、2n配子遗传类型与杂合性以及2n配子在育种实践中的有效性等进行研究。

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。