Conodont samples were collected from three localities in the Onoo Tolgoi area, Mongolia, and many conodonts have been found. Conodonts from the Onoo Tolgoi Formation （M288-M294） lack index fossils; its age could be ...Conodont samples were collected from three localities in the Onoo Tolgoi area, Mongolia, and many conodonts have been found. Conodonts from the Onoo Tolgoi Formation （M288-M294） lack index fossils; its age could be Late Silurian. Samples from the Hutul us hudag Formation （M295-M299） contain Ozarkodina pandora alpha Morph. （ P element）, clearly indicating that this formation is Early Devonian late Lochkovian in age. Samples collected from so-called Silurian Onoo Tolgoi Formation at other localities （M300-M303） yield many Ordovician conodonts, including Icriodella baotaensis, Icriodella cf. baotaensis, Eoplacognathus fianyeen- sis, Eoplacognathus protoramosus ; Baltoniodus alobatus ; and ？ Ambalodus triangularis ; the age is Late Ordovician, more precisely, early-middle Late Ordovician.展开更多
The mechanism of peroxynitrite (ONOO -)induced [Ca 2+ ] i increase in single MN9D cell (Dopaminergic neuroblastoma cell line) was studied by using Fura2 microfluorometric technique. The results show that ONOO - caused...The mechanism of peroxynitrite (ONOO -)induced [Ca 2+ ] i increase in single MN9D cell (Dopaminergic neuroblastoma cell line) was studied by using Fura2 microfluorometric technique. The results show that ONOO - caused a rapid increase of [Ca 2+ ] i when ONOO - was puffed to the cell. Removing Ca 2+ from the bath or using calcium channel antagonist (CdCl 2, Nifedipine) greatly inhibited the [Ca 2+ ] i increase induced by ONOO -, suggesting that the opening of LCa 2+ channel makes a great contribution to the [Ca 2+ ]\-i increase. The effect of sulfhydryl reductive agent (DTT) on ONOO -induced [Ca 2+ ]\-i increase suggests that ONOO -activating LCa 2+ channel is partly related to its oxidative speciality.展开更多
文摘Conodont samples were collected from three localities in the Onoo Tolgoi area, Mongolia, and many conodonts have been found. Conodonts from the Onoo Tolgoi Formation （M288-M294） lack index fossils; its age could be Late Silurian. Samples from the Hutul us hudag Formation （M295-M299） contain Ozarkodina pandora alpha Morph. （ P element）, clearly indicating that this formation is Early Devonian late Lochkovian in age. Samples collected from so-called Silurian Onoo Tolgoi Formation at other localities （M300-M303） yield many Ordovician conodonts, including Icriodella baotaensis, Icriodella cf. baotaensis, Eoplacognathus fianyeen- sis, Eoplacognathus protoramosus ; Baltoniodus alobatus ; and ？ Ambalodus triangularis ; the age is Late Ordovician, more precisely, early-middle Late Ordovician.
文摘The mechanism of peroxynitrite (ONOO -)induced [Ca 2+ ] i increase in single MN9D cell (Dopaminergic neuroblastoma cell line) was studied by using Fura2 microfluorometric technique. The results show that ONOO - caused a rapid increase of [Ca 2+ ] i when ONOO - was puffed to the cell. Removing Ca 2+ from the bath or using calcium channel antagonist (CdCl 2, Nifedipine) greatly inhibited the [Ca 2+ ] i increase induced by ONOO -, suggesting that the opening of LCa 2+ channel makes a great contribution to the [Ca 2+ ]\-i increase. The effect of sulfhydryl reductive agent (DTT) on ONOO -induced [Ca 2+ ]\-i increase suggests that ONOO -activating LCa 2+ channel is partly related to its oxidative speciality.
