【摘 要】
：
The cortical development and macronuclear evolution of the marine hypotrichous ciliate Anteholosticha manca,collected from the coastal waters near Qingdao,China
【机 构】
：
Laboratory of Protozoology,Department of Zoology,Zoology Department
论文部分内容阅读
The cortical development and macronuclear evolution of the marine hypotrichous ciliate Anteholosticha manca,collected from the coastal waters near Qingdao,China,were investigated using the protargol impregnation method.The morphogenesis of A.manca is generally typical for the genus,and can be characterized as the following features:(1) in the proter,a new oral primordium is formed on the bottom (beneath the pellicle) of the buccal cavity,disorganization of the parental undulating membranes do not contribute to the formation of this primordium; (2) FVT-cirral anlagen in both dividers develop independently,and very likely on-ly a few midventral cirri join in the formation of these primordia; (3) both marginal row and dorsal kinety anlagen develop intraki-netally within the parental structure; (4) at the middle stage,macronuclear segments fuse together to form a single mass as ob-served in most of its related forms.
其他文献
An iron-containing SBA-15(Fe-SBA-15) has been synthesized via one-pot hydrothermal method under weak acidic conditions. A series of characterizations show nanoc
Combining the computer simulation, theoretical analysis and experiments, this paper studies the process of tube-bending production of a power station boiler. Th
Breast cancer is one of the leading causes of death in women today. Some of the patients are hereditary, with a large proportion characterized by mutation in BR
Aquatic ecosystems require ecological water allocation to prevent from being damaged by natural disasters and undue exploitation. This paper discusses and estim
Nurse plants are those that facilitate the growth and development of other plant species (target species) beneath their canopy because they offer benign microha
A minitype precise spindle system which can machine precisely and stably in the process of diamond lapping and polishing is designed. In such minitype spindle s
据1999,2002-2005年渤海活性磷酸盐、石油类、无机氮的水质监测资料,采用箱式模型,估算渤海及各分区现状下及不同经济增长率下的环境容量预测值.估算结果显示.分污染物来看,
Verrnicular cast iron is used in certain fields because of its special physical properties. However, it is difficult to control the quality from the front of th
Recently,runoff in many river basins in China has been decreasing.Therefore,the role that climate change and human activities are playing in this decrease is cu
Adsorption of 134Cs from aqueous solution by zinc ferrocyanide, and the effect of experimental conditions on the adsorption were investigated. Preliminary resul