岩虫消化管组织学、组织化学和超微结构的初步研究   总被引：1，自引：0，他引：1  

毛昕  朱丽岩  郑家声 《中国海洋大学学报(自然科学版)》2007,37(6):961-967

运用光学显微镜、透射电镜和组织化学方法初步研究了岩虫（Marphysa sanguinea）消化管的组织结构和消化酶的分布。结果显示：岩虫消化管呈长直管状，可分为口咽腔、食道、肠和后肠。组织化学研究表明食道粘膜层固有层有分泌酸性粘多糖、中性粘多糖和混合粘多糖3种粘液细胞；肠及消化盲囊的上皮细胞游离端及顶部胞质均检测到碱性磷酸酶、酸性磷酸酶和酯酶的活性。透射电镜显示食道粘膜固有层的粘液细胞可分为含低电子密度颗粒、高电子密度颗粒和电子透明颗粒3种。肠和消化盲囊绒毛发达，上皮细胞表面具丰富微绒毛，游离端细胞质中可见酶原颗粒、吞饮小泡、丰富的粗面内质网及溶酶体。肠纤毛沟由纤毛柱状上皮细胞组成，带环状横纹的纤毛小根插入细胞内部，纤毛小根之间散布着丰富的线粒体、溶酶体等结构。  相似文献   

中国对虾眼柄神经分泌结构的超微结构研究   总被引：1，自引：0，他引：1  

郭明申  康现江  陈红波  陈靖路  刘龙  李彦芹  黄增瑞 《台湾海峡》2002,21(3):279-283,T002,T003

利用电镜技术并结合半薄切片对中国对虾眼柄神经分泌细胞和窦腺进行观察，依据神经分泌细胞的直径以及细胞核、细胞器、分泌颗粒的特征将其分成6种类型，依据神经分泌颗粒的直径、形态、密度特征将窦腺中的神经分泌颗粒分成6种类型。  相似文献   

秀丽白虾精子结构及生殖进化特征   总被引：3，自引：0，他引：3  

姜叶琴  杨万喜 《海洋学研究》2002,20(2):45-50

用透射电镜技术研究了秀丽白虾精子的形态结构 ,结果表明 :秀丽白虾精子属无鞭毛、单棘型精子。其外形呈图钉样 ,由主体部和棘突构成。主体部包括帽状体、细胞质带和精核。帽状体由约 2 0根辐射状排列的纤丝组成 ,纤丝具横纹。其凸面延伸成棘突 ,棘突内纤丝是帽状体内纤丝的延续 ,亦具横纹。凹面包裹细胞质和精核。细胞质退化 ,无细胞器。精核为非浓缩型 ,核膜不完整。核质呈丝状 ,在凹面及侧面核基质中分布着许多大小不一的膜性泡  相似文献   

中国对虾(PENAEUS CHINENSIS)血细胞超微结构、分类及计数   总被引：11，自引：1，他引：11  

叶燕玲  陈宽智 《中国海洋大学学报(自然科学版)》1993,(2)

研究中国对虾循环血细胞的超微结构、分类和计数。血细胞分成三类:(1)透明细胞,不含电子致密颗粒;(2)小颗粒细胞,含小的电子致密颗粒;(3)大颗粒细胞,含大的电子致密颗粒。循环血细胞总量平均值为10320个细胞/mm~3。透明细胞、小颗粒细胞和大颗粒细胞等分别占循环血细胞总量的25.32％、61.79％和12.89％。  相似文献   

ON THE ULIRASTRUCTURE AND CLASSIFICATION OF THE HEMOCYTES OF PENAEID SHRIMP, PENAEUS VANNAMEI (CRUSTACEA, DECAPODA)     

刘恒  王雷 《中国海洋湖沼学报》1998,(4)

INTRODUCTIONHemocytesOfcrustaceansplayanimportantroleintheirimmunedefensenetWork(thethall,Cerenius,l992).Thesecellscanremoveforeignpallicleshyphagocytosis(Tyson,Jenldn,l974;Paterson,Stewed,l974)andencaPsulation(HoseandMartin,l989;Perssonetal.,1987)-TheraPidsealingofawoundtopreventhemolYmPhlossanddric~AnsmsfromPenetraingthewoundisanotherimportantprocessiflaqUaiccrustaceansandisthoughttobecormectedwiththeactivitiesofhemocytes(tevin,l985)-AttemPtshadbeenInadefromoverl(X)yearstoclass@…  相似文献   

On the ultrastructure and classification of the hemocytes of penaeid shrimp,Penaeus vannamei (Crustacea, Decapoda)     

Liu Heng  Wang Lei 《中国海洋湖沼学报》1998,16(4):333-338

The ultrastructure of hemocytes ofPenaeus vannamei was examined by transmission electron microscope. Three types of hemocytes were identified: hyaline cell, small-granule cell and large-granule cell. Hyaline cells are the smallest of the hemocytes, lack electron-dense granules, have average size of 11.11 μm (SE±0.50,n=10)×6.96μm (SE±0.55,n=10), comprise 25.8% (SE±2.87,n=4×10) of the hemocytes; small granule cells are the most abundant type of hemocytes, comprise 58.1% (SE±3.40,n=4×10) of the hemocytes, contain small electron—dense granules, have average size of 10.78 μm (SE±0.60,n=10)×8.63 μm (SE±0.44,n=10); and large-granule cells comprise 16.1% (SE±2.55,n=4×10) of the hemocytes, are filled with large electron dense granules, have average size of 12.51 μm (SE±0.63,n=10)×8.99μm (SE±0.71,n=10). This research was supported by the National Climbing Project B, PDB6-6-3. Contribution No. 3448 from the Institute of Oceanology, Chinese Academy of Sciences.  相似文献   

丁青和新喀里多尼亚玻安岩类的辉石及其超微结构     

黄婉康  王岩国  张旗  王明再  T.Sameshima 《矿物学报》1993,(2)

本文对西藏丁青玻安岩类深成岩的辉石和新喀里多尼亚玻安岩的斜顽辉石进行了矿物学工作及高分辨电镜观察。丁青斜方辉石堆晶岩辉石的超微结构包括:单斜辉石的(100)双晶、斜方辉石a/4平移畴结构及斜方辉石—单斜辉石相转变。玻安岩斜顽辉石典型超微结构是(100)双晶。由矿物的碎裂、错动以及斜方辉石—单斜辉石相变中只出现偶数倍单斜辉石等表明:矿物结晶及成岩过程中曾受应力作用、后者可能与岩石所处的构造位置有关。由辉石成分计算的地质温度表明,丁青堆晶斜方辉石岩的辉石是在高温下晶出、岩石固结温度是1013～1111℃,当它们在～1000℃下稳定时,斜方辉石出溶了单斜辉石片晶。将玻安岩斜顽辉石加热至1100℃后淬冷及按120℃/h速度冷却均未得到纯的斜顽辉石,可能斜顽辉石是原顽火辉石在应力环境中高温淬冷所成。  相似文献   

The Ultrastructure and Origin of Upper Sinian Cherts on the Southeast Continental Margin of the Yangtze Platform1     

Yi Haisheng  Zeng Yunfu  Xia Wenjie 《《地质学报》英文版》1994,7(4):389-400

Abstract Through microscopic and SEM observations and X-ray diffraction and energy spectrum analyses, the oldest sponge spicules and radiolarians have been found in bedded cherts and it is proposed that microbial activity of algae and bacteria played an important role in silica precipitation. The microbial activity resulted in the formation of a series of single crystals and crystal aggregates with peculiar shapes. Biogenic single crystals usually occur in spherical, rod, platy, colloidal and granular forms. The most common aggregates are framboidal aggregates composed of dense spherical quartz crystals, which are considered to be of typical bacterial origin. Other aggregates, such as favositic, double-spherical, chain -spherical and coccoid ones, are considered to be probably the result of silicification of algal cells and mainly of primary sedimentary origin. This paper also discusses the ultrastructural features and diagnostic indications of jasper rocks formed in a submarine hydrothermal environment and cherts formed by replacement and diagenetic recrystallisation.  相似文献   

The infrastructure and Origin of Upper Sinian Cherts on the Southeast Continental Margin of the Yangtze Platform     

Yi Haisheng  Zeng Yunfu  Xia WenjieChengdu C allege of Geology  Chengdu  Sichuan Fei Zhenbi 《《地质学报》英文版》1994,68(4)

Through microscopic and SEM observations and X-ray diffraction and energy spectrum analyses, the oldest sponge spicules and radiolarians have been found in bedded cherts and it is proposed that microbial activity of algae and bacteria played an important role in silica precipitation. The microbial activity resulted in the formation of a series of single crystals and crystal aggregates with peculiar shapes. Biogenic single crystals usually occur in spherical, rod, platy, colloidal and granular forms. The most common aggregates are framboidal aggregates composed of dense spherical quartz crystals, which are considered to be of typical bacterial origin. Other aggregates, such as favositic, double-spherical, chain-spherica'l and coccoid ones, are considered to be probably the result of silicification of algal cells and mainly of primary sedimentary origin. This paper also discusses the ultrastructural features and diagnostic indications of jasper rocks formed in a submarine hydrothermal environment and cher  相似文献   

鲤鱼神经垂体的超微结构研究     

贾翠红  车轶  李世美  张志南 《中国海洋大学学报(自然科学版)》1997,(3)

经电子显微镜观察，提出鲤鱼（Ｃｙｐｉｎｕｓｃａｒｐｉｏ）神经垂体（ｎｅｕｒｏｈｙｐｏｐｈｙｓｉｓ）由有髓神经分泌纤维和三种无髓神经分泌纤维（Ａ．Ｂ．Ｃ）以及垂体细胞和毛细血管组成。神经分泌纤维与垂体细胞之间存在着突触联系，神经分泌纤维之间只有细胞间连接（桥粒）。在神经垂体组织中还存在Ⅰ型和Ⅱ型两种结构与功能不同的垂体细胞，另外在血管间道内观察到了很少见的特殊空泡结构  相似文献