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Hormone level in maturation medium affected cumulus expansion of COC,but cumulusexpansion became less dependent on hormone level with time of culture.Porcine immaturedoocytes,granulosa cells from small antral follicles and cumulus cells of immatured oocytessecreted cumulus-expansion enabling factors.Granulosa cells from 3-6mm follicles did notproduce CEEF,but there was some CEEF in the follicular fluid of this sized follicles.Sun xingshen, Animal Histology and Embryology

激素水平对卵丘扩展有影响,但随培养时间的延长,对激素的要求有逐步减少的趋势;猪卵丘扩展不依赖于卵母细胞,卵母细胞核成熟也与卵丘扩展无关;GV期卵母细胞、小腔卵泡内颗粒细胞和成熟卵的卵丘细胞都有较高的分泌CEEF能力;3-6mm卵泡的壁颗粒细胞不能分泌CEEF,但3-6mm卵泡的卵泡液中有CEEF。

The sac structure projected through the pollen aperture possesses the typical nature of transfer cell, i. e complex lybrinthian wall ingrowth and abundant mitochondria, RER, dicotysomes and ribosomes under the wall. Its outer surface is closely related to the tapetal protoplast. The accumulation of storaged material in pollen start at the area near the apertures. Above restults indicate the pollen apertures may be the"door"from where nutrition flows into pollen in P. hortorum.

绒毡层物质向花粉粒的短途运输明显的表现在花粉的萌发孔区,一方面形成向外突起的囊腔,另一方面在这里具有发达的壁迷宫,而且迷宫下具丰富的线粒体,RER和高尔基体等细胞器,此外花粉内贮藏物的大量积累首先从萌发孔附近开始以及萌发孔处与绒毡层有紧密接触都说明天竺葵花粉萌发孔可能是物质进入花粉的&门户&。

The results showed that:(1) In COPD group the alveolar walls were broken. The average area of alveolars was 2.46 times as big as the control group, and the average diameter was 1.42 times as compared with the control group. As the diameter of bronchioles was less than 100μm and 100~200μm respectively, the average area of smooth muscle in bronchioles increased to 3.06-fold and 2.13-fold respectively. By electron microscopic, the proportion of Clara cells of respiratory bronchioles in COPD group decreased, the Clara cells were denaturalized, the proportion of Clara cells containing low density secretory granules increased. The airway resistance was 1.84 times while the dynamic compliance was only 70.45% comparing with the control group.

结果表明:(1)光镜下,COPD组大鼠与正常对照组比较,肺泡壁破坏、肺泡腔扩大,平均肺泡面积和平均肺泡直径分别为正常对照组的2.46倍和1.42倍,在直径<100μm及直径100~200μm的小支气管,COPD组大鼠支气管平滑肌面积分别为正常对照组的3.06倍和2.13倍;电镜下可见,在呼吸性细支气管,Clara细胞占上皮细胞的比例下降,细胞变性,含低电子密度颗粒的Clara细胞比例增加;呼吸功能测定可见COPD组大鼠呼气相气道阻力是正常对照组的1.84倍、动态呼吸系统总顺应性为正常对照组的70.45%。

Path analysis of nine traits, which were highly correlated with tree volume, showed that the direct contribution of DBH and height on the variations of tree volume took up about 63% of the total variations. On the other hand, those traits, such as tree crown and wall/lumina, affected the volume strongly by indirect way of the genetic correlation with DBH and height.

通过对与材积性状紧密相关的胸径等9个性状的通径分析发现,胸径和树高两个性状对单木材积的直接作用占材积总变异的63%,其余性状的直接控制作用很小;冠幅、壁腔比等性状通过胸径对单木材积具有很大的间接遗传控制作用,这种控制是通过与胸径、树高的遗传相关实现的。

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