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Search Results: 1 - 10 of 53754 matches for " 应雪萍 "
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泥螺肝胰腺细胞的超微结构和功能

海洋科学 , 2007,
Abstract: 利用透射电镜技术研究了泥螺(Bullactaexarata)肝胰腺细胞的超微结构。结果表明,泥螺的肝胰腺主要由4类细胞构成:泡状细胞(B细胞)、吸收细胞(R细胞)、纤维细胞(F细胞)和胚细胞(E细胞)。B细胞大,长柱状,胞质中有许多消化泡;R细胞的脂滴数量多,体积大,具少量的线粒体;F细胞含有极丰富的粗面内质网、线粒体等结构,但脂滴的数量远远少于R细胞。E细胞为多边形,核大而圆,粗面内质网少,线粒体小而狭长。根据这4种细胞的超微结构特点,指出了泥螺肝胰腺的功能,并探讨了肝胰腺细胞的分化序列。
Mitochondrial Changes During Vitellogenesis in Oocytes of Bullacta exarata
泥螺卵黄发生过程中线粒体的变化

,杨万喜
动物学研究 , 2001,
Abstract: The changes of mitochondrial ultrastructure during vitellogenesis in oocytes of Bullacta exarata were investigated by transmission electron microscope method. The results show that mitochondria are the organelles that first involved in the information of yolk granules,their outer and inner morphology differ in different oocyte stages,and the numbers of typical ones decrease during the process of vitellogenesis. At the early stage of vitellogenesis,there are many mitochondria in ooplasm of the oocytes. These are rounded with numerous cristae and electron dense matrix. Then some mitochondrial cristae and inner membrane begin to degenerate. At the mid stage,the cristae and inner membrane disappear,there are a great number of small dense masses in the mitochondrial lumen,these masses grow in size and develop into mature yolk granules,many of these granules resemble mitochondria,and a number of transitional stages share both mitochondria and yolk body features. At the end stage of vitellogenesis,there are lots of yolk bodies increasing in the number and diameter,and there are some mitochondria among yolk bodies that supply energy to cell metabolism. Finally,the changes and functions of the mitochondria in vitellogenesis are discussed.
中华绒螯蟹不同发育时期胚胎及流产胚胎的同工酶变化
贾守菊,,陈艳乐,
动物学杂志 , 2005,
Abstract:
Structural Characteristics of Normal and Abnormal Embryos Attachment of Eriocheir sinensis
中华绒螯蟹正常附着胚胎与流产胚胎的结构特点

YING Xue-ping,

动物学研究 , 2005,
Abstract: The structural features of normal and abnormal embryo attachment systems of the Chinese mitten crab Eriocheir sinensis were investigated by scanning electron microscopy. The results showed that the volume of in cubation fluid inthe brooding chamber increased 15 minutes after egg-laying, immersing the embryos in the incubation fluid and thus the egg envelop became very sticky immediately. The egg stalk was largely formed within 30 minutes and completed within 80 to 140 minutes after egg-laying, so that the egg envelop became strongly adherent to the ovigerous hairs. In normal embryos, the egg stalks were highly twisted and the embryos were attached to the ovigerous hair by the egg stalk or funiculus. Many villiform were found on egg stalks and a lot of mucus was also found on the ovigerous seta. In abnormal egg stalks, villiform were never found, though numerous epibionts were attached to the embryo surface and egg stalk. The mucus of ovigerous hair and the villiform of egg stalks may contribute to egg attachment. Because of the epibionts the structure of egg investment coat egg stalk and funiculus were changed, enhancing the attrition between embryos and making embryo respiration difficult. The death and loss of embryos occur because of the above reasons.
Ultrastructure and function of the hepatopancreas of Bullacta exarata
泥螺肝胰腺细胞的超微结构和功能

YING Xue-ping,

海洋科学 , 2007,
Abstract: The ultrastructure of the hepatopancreas of Bullacta exarata was studied through electronic microscopy.The result shows that the hepatopancreas of B.exarata are composed of four types of cells in the wall of tubules:the embryonic cell(E-cell),resorptive cell(R-cell),fibrillar cell(F-cell),and blister cell(B-cell).B-cell contains numerous digestive vesicle.R-cell.demonstrates a marked increase in lipid droplet size and number over F-cell.The F-cell has more rough sndoplasmic reticulum,mitochondria and free ribosomes.E-cell are polyhedral.The cytoplasm contains relatively sparse rough endoplasmic reticulum,small mitochondria.The ultrastructures of these cells were given and their functions were discussed.The differentiation sequences of hepatopancreas were suggested in this paper.
中华绒螯蟹(Eriocheir sinensis)成熟蟹、抱卵蟹、流产蟹肝胰腺脂肪酸组成的比较研究
,张永普,杨万喜
海洋与湖沼 , 2004,
Abstract: 采用气相色谱仪测定中华绒螯蟹(Eriocheir sinensis)不同生理阶段(成熟、抱卵、流产)肝胰腺内的脂肪酸组成。结果表明,中华绒螯蟹肝胰腺中含有22种脂肪酸,其中饱和脂肪酸(SFA)5种,单烯酸(MUFA)5种,多烯酸(PUFA)12种;MUFA 的含量最高,占52.47%-58.56% 。SFA次之,为23.17%-29.20 %,PUFA的含量较低,为8.92%-21.11% 。SFA、MUFA、PUFA的含量和Cn-3/ Cn-6值在不同生理阶段的中华绒螯蟹肝胰腺中差异极显著,油酸(C18:1)、棕榈酸(C16:0)、棕榈油酸(C16:1)是肝胰腺中的主要脂肪酸,其含量分别为35.21%-40.49%、17.97%-21.97%和11.69%-14-90%,不同生理阶段的中华绒螯蟹肝胰腺中各脂肪酸的百分含量差异显著。比较研究温州本地抱卵蟹和太湖抱卵蟹肝胰腺中的脂肪酸,发现脂肪酸中SFA、MUFA、PUFA的含量和Cn-3/ Cn-6值差异极显著,除C14:1、C18:1、C20:1及C20:5外,其它脂肪酸的百分含量存在极显著的差异。
可口革囊星虫消化道的形态及组织学结构
,童莉里,黄晓雷
动物学杂志 , 2005,
Abstract:
橄榄蚶三个地理群体的形态差异分析
张永普,,王铁杆,
海洋科学 , 2009,
Abstract: 运用多变量形态度量学分析方法,采用9项生物学形态性状指标比较了中国橄榄蚶(Estellarcaolivacea)3个地理群体间的形态差异。聚类分析和主成分分析结果表明,浙江三门群体和浙江灵昆群体形态较为接近,江苏通州群体的趋异程度较大。主成分分析构建了两个主成分,第一主成分贡献率为47.73%,第二主成分贡献率为13.56%,累计贡献率为61.29%。贝体凸扁、壳厚和前后端形状等形态性状决定了橄榄蚶不同地理群体的形态差异,其形态变异主要与栖息地水温和底质有关。
镉暴露对文蛤雄性生殖细胞的影响
刘建博,潘登,江安娜,黄晓亮,
环境科学学报 , 2013,
Abstract: 以文蛤(Meretrixmeretrix)为实验材料,采用体外暴露法进行镉染毒,镉离子浓度设置为0、1.5、3、6和12mg·L-1.染毒5天后解剖取材,测量其精子浓度、运动能力、顶体酶活性和核DNA完整性;目的是从生理、生化和分子生物学角度综合评价镉对文蛤雄性生殖细胞的影响.实验结果表明,文蛤精子浓度、运动能力、顶体酶、DNA完整性均在镉浓度小于成体半致死浓度的情况下,与镉浓度呈现出显著的剂量-效应关系.对镉离子的敏感性分别为:DNA完整性>精子浓度>顶体酶活性>快速运动比例>运动比例.文蛤雄性生殖细胞的生理、生化指标均可作为重金属镉污染海洋贝类毒性效应的指示物.
镉离子对文蛤肝胰腺超微结构的影响
刘建博,夏利平,徐瑞,陈思涵,
动物学杂志 , 2014, DOI: 10.13859/j.cjz.201405012
Abstract: 本文以文蛤(Meretrixmeretrix)为实验对象,将其在不同浓度镉溶液(0、1.5mg/L、3mg/L、6mg/L)中染毒5d,并利用透射电镜技术分析文蛤肝胰腺细胞的超微结构变化。结果表明:镉对文蛤肝胰腺细胞超微结构的影响较大,主要表现在对内膜系统和线粒体的破坏上,其中线粒体嵴减少,肿胀变形,逐渐空泡化;粗面内质网由原先的板层状结构解体,形成许多大小不同的小泡。微绒毛脱落并逐渐减少,部分空泡化,高尔基体膜也有扩张的现象。膜性结构形成的空泡中出现沉积物,核膜出现内陷。镉离子破坏了文蛤肝胰腺细胞膜和主要细胞器的结构,影响了肝胰腺细胞的正常生理机能,随着镉溶液浓度的升高,对肝胰腺细胞结构的破坏性也增强。
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