[Objective] The study was to immunohistochemical localize the endocrine cells from digestive tract of Misgurnus [ Method ] Using six gastrointestinal hormone antisera, the endocrine cells from digestive tract of M. an...[Objective] The study was to immunohistochemical localize the endocrine cells from digestive tract of Misgurnus [ Method ] Using six gastrointestinal hormone antisera, the endocrine cells from digestive tract of M. anguillicaudatus was localized. [ Result ]The 5-hydroxytryptamine immunoreactive（5-HT-IR） cells distribute in oesophagus, foregut and midgut; the distribution density was determined to be forepart of foregut 〉 oesophagus and hindpart of foregut 〉 gut, and the differences in the three density gradients reached significant level. Like PP-IR, SS-IR cells were observed mostly in oesophagus, followed by hindpart of foregut, least in forepart of foregut, but never found in gut and hindgut. The three kinds of immunocompetent cells Gas-IR, Glu-IR and SP-IR were not detected in each part of digestive tract. [ Conctusion] This study may provide basic data for studying the nutritional and digestive physiology, as well as the preparation of meridic diets for M. anguillicaudatus.展开更多
On the basis of new paleontological data,the sequence and distributions of the Middle Devonian-Tournaisian rocks on Hainan Island have been sorted out for the first time.The Devonian rocks include the Middle Devonian ...On the basis of new paleontological data,the sequence and distributions of the Middle Devonian-Tournaisian rocks on Hainan Island have been sorted out for the first time.The Devonian rocks include the Middle Devonian Jinbo Formation and the Upper Devonian Changjiang Formation,which are distributed in northwestern Hainan Island.The Jinbo Formation is represented by631 m of littoral facies deposits,and was intruded by the Yanshanian granite in the base.The presence of chitinozoans Eisenackitina caster,Funsochitina pilosa,and Lagenochitina amottensis indicates the Givetian in age.The Changjiang Formation is made up of 140 m of neritic facies rocks,and contains the Famennian conodonts Palmatolepis gracilis sigmoidalis,Polygnathus germanus,and corals Cystophrentis kalaohoensis.The Devonian-Tournaisian transition beds,the lower part of the Jishi Formation,are composed of 61–129 m sandstone and siltstone,with gastropods Euomphalus spp.and brachiopods,and marked by conglomerate with the underlying Devonian rocks.The middle-upper part of the Tournaisian Jishi Formation consists of 100–251 m clastic and carbonate rocks,containing abundant corals Pseudoularinia irregularis,conodonts Siphonodella isosticha,trilobites Weberiphillipsia linguiformis,and brachiopods.On the basis of the occurrence of Xinanosprifer flabellum and Homotoma sp.,the Nanhao Formation in southern Hainan Island is now regarded as the Lower Silurian,instead of the previously designated Lower Carboniferous.It is confirmed that no Carboniferous rocks occurred in the area south to the Gancheng-Wanning Fault.展开更多
基金Supported by Anhui Key Laboratory of Plant Resources and Biology~~
文摘[Objective] The study was to immunohistochemical localize the endocrine cells from digestive tract of Misgurnus [ Method ] Using six gastrointestinal hormone antisera, the endocrine cells from digestive tract of M. anguillicaudatus was localized. [ Result ]The 5-hydroxytryptamine immunoreactive（5-HT-IR） cells distribute in oesophagus, foregut and midgut; the distribution density was determined to be forepart of foregut 〉 oesophagus and hindpart of foregut 〉 gut, and the differences in the three density gradients reached significant level. Like PP-IR, SS-IR cells were observed mostly in oesophagus, followed by hindpart of foregut, least in forepart of foregut, but never found in gut and hindgut. The three kinds of immunocompetent cells Gas-IR, Glu-IR and SP-IR were not detected in each part of digestive tract. [ Conctusion] This study may provide basic data for studying the nutritional and digestive physiology, as well as the preparation of meridic diets for M. anguillicaudatus.
基金supported by National Natural Science Foundation of China(Grant Nos.40772022,41172025)China Geological Survey Project(Grant Nos.1212011120116,1212011220517)
文摘On the basis of new paleontological data,the sequence and distributions of the Middle Devonian-Tournaisian rocks on Hainan Island have been sorted out for the first time.The Devonian rocks include the Middle Devonian Jinbo Formation and the Upper Devonian Changjiang Formation,which are distributed in northwestern Hainan Island.The Jinbo Formation is represented by631 m of littoral facies deposits,and was intruded by the Yanshanian granite in the base.The presence of chitinozoans Eisenackitina caster,Funsochitina pilosa,and Lagenochitina amottensis indicates the Givetian in age.The Changjiang Formation is made up of 140 m of neritic facies rocks,and contains the Famennian conodonts Palmatolepis gracilis sigmoidalis,Polygnathus germanus,and corals Cystophrentis kalaohoensis.The Devonian-Tournaisian transition beds,the lower part of the Jishi Formation,are composed of 61–129 m sandstone and siltstone,with gastropods Euomphalus spp.and brachiopods,and marked by conglomerate with the underlying Devonian rocks.The middle-upper part of the Tournaisian Jishi Formation consists of 100–251 m clastic and carbonate rocks,containing abundant corals Pseudoularinia irregularis,conodonts Siphonodella isosticha,trilobites Weberiphillipsia linguiformis,and brachiopods.On the basis of the occurrence of Xinanosprifer flabellum and Homotoma sp.,the Nanhao Formation in southern Hainan Island is now regarded as the Lower Silurian,instead of the previously designated Lower Carboniferous.It is confirmed that no Carboniferous rocks occurred in the area south to the Gancheng-Wanning Fault.
