| discovery of larval gnathostoma nipponicum in frogs and snakes from jeju-do (province), republic of korea. | a survey was performed to find out the intermediate hosts of gnathostoma nipponicum in jeju-do (province), the republic of korea. in august 2009 and 2010, a total of 82 tadpoles, 23 black-spotted pond frogs (rana nigromaculata), 7 tiger keelback snakes (rhabdophis tigrinus tigrinus), 6 red-tongue viper snakes (agkistrodon ussuriensis), and 2 cat snakes (elaphe dione) were collected in jeju-do and examined by the pepsin-hcl digestion method. total 5 gnathostome larvae were detected in 3 (50%) of ... | 2011 | 22355217 |
| lack of the blocking effect of cobrotoxin from naja naja atra venom on neuromuscular transmission in isolated nerve muscle preparations from poisonous and non-poisonous snakes. | neuromuscular transmission in the chinese cobra naja naja atra was not affected by its own toxin (cobrotoxin) at a concentration of as high as 100 microm, while in the frog a concentration of less than 0.1 microm cobrotoxin depressed the amplitude of the end-plate potential to less than 10% of its original value within 30 min or directly blocked the nerve-evoked muscle action potential. the lack of effect of cobrotoxin was also observed in the nerve-muscle preparations from a pit viper (agkistro ... | 1990 | 2175458 |
| four types of potassium currents in motor nerve terminals of snake. | the experiments were performed on transversus abdominis muscle of elaphe dione by subendothelial recording. the results indicate that in snake motor nerve endings there exist four types of k(+) channels, i.e. voltage-dependent fast and slow k(+) channels, ca(2+)-activated k(+) channel and atp-sensitive k(+) channel. (i) the typical wave form of snake terminal current was the double-peaked negativity in standard solution. the first peak was attributed to na(+) influx (i(na)) in nodes of ranvier. ... | 1997 | 18726283 |
| [stages of the development of the embryos of snakes by the time of oviposition]. | embryos of 6 species of snakes--ptyas mucosus (l.), elaphe dione (pall.), psammophis lineolatum (brandt), natrix tesselata (laur), naja oxiana (eichw.), vipera lebetina turanica (cernov) and v. l. obtusa--at the stage of egg laying are described morphologically. different species of snakes are shown to lay the eggs containing embryos of different degrees of maturation. this series of transitions at the embryonic age (up to the time of egg viviparity) is connected with ecological peculiarities of ... | 1976 | 1037475 |