外胚叶

Chd protein is able to dorsalize mesoderm and to neuralize ectoderm in Xenopus gastrula explants at 1 nM.

Chd蛋白质可以使中胚叶背部化，也可以背化1海哩的爪蟾肠胚外植体里面的外胚层。

Ectrodactyly, ectodermal dysplasia and clefting syndrome is characterized by split hand-split foot malformation, congenital ectodermal dysplasia and cleft lip with or without cleft palate.

目前，以先天性缺指、并指或手足裂和外胚叶发育不全伴或不伴腭裂的唇裂为主要临床表现的先天性缺指-外胚叶发育不全-唇/腭裂综合征的病因仍然不明，给疾病的防治带来了较大的困难。

ABSTRACT Purpose To investigate in clinicopathological features, histogenesis and biological behavior of primary primitive neuroectodermal tumors of cerebrum and spinal cord.

目的：探讨原发于大脑和脊髓原始神经外胚叶肿瘤的临床病理特征、组织学发生及生物学行为。

Firstly, it is found that there are many obvious differences between Acorus and Araceae. Their differences are based on many aspects which include characteristics of morphology, anatomy and epidermis of leaf, types of tapetum in anther walls , patterns of endothecial thickenings, and ways of development of endosperms, presence or absence of perisperm, components of photochemistry, and sequences of rbcL.

研究表明：1。菖蒲属与天南星科其它属在叶的形态、结构、表面特征，花药绒毡层类型，药室内壁增厚的特点，胚乳的发育方式，外胚乳的有无，植物化学成分，rbcL基因序列等多方面存在着显著的差异。

ABSTRACT:Objective To identify the mutations of ED1 gene in a family with X-linked hypohidrotic ectodermal dysplasia.

目的 利用直接测序法对一中国汉族人X性连锁少汗性外胚叶发育不良家系进行基因诊断。

Objective: To identify EDA gene mutation in a pedigree of Han nationality in Xinjiang with X-linked hypohidrotic ectodermal dysplasia so as to provide a basis for gene and genetics diagnosis of this disorder.

目的：检测一新疆汉族X连锁少汗性外胚叶发育不全家系引起先天缺牙的EDA基因突变，为XLHED综合征的基因和遗传学研究提供理论依据。

Methods Eight coding exons of ED1 gene of two patients with clinically confirmed X-linked hypohidrotic ectodermal dysplasia, their parents, and 100 unrelated population-matched control were amplified by polymerase chain reaction. The products were further analyzed by direct sequencing.

采用聚合酶链反应扩增该家系中两名临床诊断为X性连锁少汗性外胚叶发育不良的患者、患者父母以及100例健康对照者ED1基因的8个外显子，进行DNA直接测序。

ABSTRACT Pachyonychia congenita is an autosomal dominant genodermatosis characterized by ectodermal dysplasias, of which the hypertrop...

先天性厚甲症(Pachyonychia congenita，PC)系外胚叶缺陷病，是一种常染色体显性遗传性疾病。

CCSK is a rare type of renal neoplasm in childhood and its diagnosis relies mainly on histopathology and immunohistochemistry. It is important to be familiar with the morphological variants of CCSK to avoid confusion with other similar lesions, such as Wilm's tumor, congenital mesoblastic nephroma, malignant rhabdoid tumor of kidney, primitive neuroectodermal tumor.

CCSK是一种罕见的儿童期恶性肾肿瘤，诊断主要依靠组织病理学和免疫组化，熟悉其形态学变异有利于与其它类似病变如肾母细胞瘤、先天性中胚叶肾瘤、肾恶性横纹肌样瘤、原始神经外胚叶肿瘤等鉴别。

Results Histologically, AT/RT was characterized by the presence of rhabdoid cells associated with various degrees of primitive neuroectodermal, epithelial or mesenchymal differentiation.

结果 非典型畸胎样／横纹肌样瘤具有特征性的横纹肌样细胞，伴有不同程度的原始神经外胚叶、上皮和间质分化。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。