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The presence of a large population of apoptotic cells in chorionic villi and decidua might contribute to the morphological changes of these tissues, and also the development of the fetus.

细胞凋亡在胚胎的发育过程中起着重要作用,自然流产绒毛和蜕膜组织中大量的细胞凋亡是其形态学退变的重要原因,并进而阻碍了胚胎的发育。

The life-cycle of C.baileyi in Beijing duck and in the CAM of chicken embryowas studied with both the light-microscope and the Nomarski interference-contrastmicroscopy.The results indicated that the life-cycle within duck was simillar tothat of CAM.It included excystation, merogony,gamogonyand sporogony.The thin-walled oocyst was first observed and described in China.

借助普通光学显微镜和微分干涉显微镜对C.baileyi在北京鸭体内的生活史和在鸡胚绒毛尿囊膜上的生活史进行了较详细的研究,结果表明:C.baileyi在北京鸭体内和在CAM上的生活史相同,主要包括"脱囊—裂殖生殖—配子生殖—孢子生殖"四个阶段。

This paper studied the effect of pollen rations on duodenum configuration and structure of growing-finishing swines, including the effect on the length and figure of intestinal villi, the length of duodenum secretory, amount of plasma cell and aggregated lymphoid nodules in membrana propria.

研究了蜂花粉对生长肥育猪十二指肠形态及组织结构的影响,考察了不同比例的蜂花粉对十二指肠绒毛长度及形态、肠腺长度、固有膜中的浆细胞、集合淋巴小结的影响。

The basolateral M cell surface is invaginated to form an intracellular central pocket into and out of which lymphocytes and macrophages.

M细胞是一种特化的上皮细胞,多分布于Peyer's结圆顶区的周边,FAE的顶端未见M细胞;其结构有别于相邻的肠上皮细胞,表面没有长而整齐的微绒毛,取而代之的是粗而短的微皱褶,胞质内终末网不发达,溶酶体较少,基底膜向顶部穹隆状突起,形成一&口袋&样结构,其中含有多个免疫活性细胞。

In rat esophagus, the positive varicosities and fibres could be observed in the circular muscle layer and the muscularis mucosae layer at 21st day before birth. With the development of rat digestive tract, neurokinin A-immunoreactivity positive nerves could be observed gradually in the epithelium, submucosa, longitudinal muscle layer, myenteric plexus and submucosal plexes, while mature nerve fibres could be seen at one month after birth. 2. In rat stomach, the positive reaction of NKA initially happened in the myenteric plexus at the 14th day of embryo, and then appeared on circular muscles, longitudinal muscles, submucosal, muscularis mucosae, lamina propria and epithelium. 30 days after birth, expression of NKA is same as seen in adaulthood. 3. In rat small intestinal, the NKA-IR could first be found in the myenteric plexus of the duodenum, jejunum and ileum at 14th , 15th and 17th day before birth respectively. Then the NKA-IR occurred in the longitudinal muscle layer, circular muscle layer, intestinal villus, intestinal gland, muscularis mucosae, submucosa, submucosal plexes, mucosa plexus and deep muscular plexus.

结果 1、在食管,于胚胎21天的粘膜肌层和环肌层内观察到神经激肽A免疫阳性膨体纤维,出生后,随幼鼠的生长发育,相继在上皮,粘膜下层,纵肌层、肌间丛、粘膜下丛有NKA-IR表达,30天时已和成年鼠相似;2、在胃,首先于胚胎14天的肌间丛出现NKA-IR的表达,随发育相继在环肌、纵肌,粘膜下层、粘膜肌、固有膜及上皮内出现NKA-IR的表达,30天时具备成年鼠的分布特征;3、在小肠,分别于胚胎14、15、17天的十二指肠、空肠和回肠的肌间丛处出现NKA-IR的表达,随发育相继出现在纵肌、环肌、绒毛、小肠腺周、粘膜肌、粘膜下层、粘膜下丛、粘膜丛、深肌丛。

The injured gill cells had a different ultrastructure, with endoplasmic reticulum dilated and vesiculated, mitochondrial cristaes partially disintegrated, gill fibre cuticles denatured and dropped. The ultrastructural damages to hepatopancreatic cells were characterized by the decrease of microvilli, swelling and breaking up of mitochondria, expansion of endoplasmic reticulum, disruption and vacuolization of nucleus, tumefaction of nuclear membrane and increase of lipid droplets. As for the toxicological changes of myocardial cells, the mitochondria were swelling, having a lot of vacuolus and disintegrating, while the myofibrils were irregular with endoplasmic reticulum dissolved.

鳃细胞的损害表现为鳃丝水肿,细胞器溶解,角质层变薄,线粒体、内质网的肿胀、解体;肝胰脏细胞的主要损害特征为肝管微绒毛减少,线粒体水肿解体,内质网扩张,细胞核空泡化,核膜水肿和脂肪滴增加;心脏细胞的毒理变化为线粒体内嵴肿胀、瓦解,肌原纤维不规则,内质网溶解。

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