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壁龛
    Pressurization of Jet Flow in a Niche of Railroad Tunnel and Optimization Analyses of Its Ventilation System
    铁路隧道壁龛式射流增压及其通风系统的优化分析
    The progress in studies on the functions of stem cell niche
    干细胞壁龛功能的研究进展
    2、tomb with small niche,wall niche or side chamber: The number of this kind of tomb is five, some of them have two small niches or two side chambers,even,one of the tombs has six wall niches.
    不带小龛、壁龛、耳室的墓:这些砖墓平面呈方形、圆角方形或长方形,是砖室墓的常见形式。 (二)土洞墓:土洞墓主要集中在大同与侯马两地,都为单室墓,墓室的平面形状不象砖室墓那么规整,有的呈长方形,有的为梯形,有的为不规则形。
    In addition, the correlation coefficient of scale value variation of component WE to tilting values of the component NS is 0.96. Occasionally greater variation of scale values of component NS has related to change of temperature distribution in the niche, when opening the door of niche to adjust the pendulums.
    东西向格值变化与南北方向倾斜量间相关系数为0.96; 南北方向格值偶而变化较大,与开壁龛门调摆,壁龛内温度场的分布情况改变有关。
    The niche were 8-36 mm in length, 1-3mm in width, and frequently found at gastric antrum and posterior wall of gastric body.
    壁龛长0.8~3.6cm,宽0.1—0.3cm.
    Based on the boundary condition of jet flow in a niche and the interaction of jet with air current,a pressurization relation equation have been established.
    本文根据壁龛射流的边界条件,进行射流与通风气流之间运动和力的作用关系分析,建立了壁龛射流的增压关系式。
    This relation contains the basic factor of jet ventilation and the geometry element of niche.
    该式包括了射流通风的基本要素,壁龛的主要作用条件和影响系数。
    When embryonic renal stem cells developed, the microenvironments, which constituted by many factors including the osmotic pressure and oxygenic pressure, imply that the adult renal stem cells may reside in the renal medulla,and the renal papilla may be the niche for adult kidney stem cells.
    胚胎肾干细胞发育时,渗透压、氧压等多种因素组成的微环境提示髓质部可 能是成体干细胞存在区域,肾乳头部为千细胞的壁龛
    Accompanying with further extension in the investigation of stem cells,the effects of niche that serves as their microenvironment in tissue on the functions of stem cells attract more and more attention.
    随着干细胞研究的不断深入,人们愈来愈重视干细胞在机体组织中的居住环境——壁龛(niche)对干细胞的影响。
    Endothelial cells secrete a great variety of hematopoiesis regulatory factor,making the progenitor cells localized in the "niche",thus endothelial cells can regulate the proliferation and differentiation of the progenitor cells.
    内皮细胞通过分泌多种造血调控因子,将定向造血干细胞定居于“壁龛”中,从而调控其增殖和分化。
 

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