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781.
Factor X activator in Echis carinatus venom was determined by incubating the zymogen 'factor X' with venom, interrupting the activation process by ethylenediaminetetraacetic acid and measuring the generated proteinase 'factor Xa' by means of a synthetic chromogenic substrate. A comparison of factor X- and prothrombin-activating potencies in E. carinatus venoms of five different geographic origins revealed no correlation between these two procoagulant activities. 相似文献
782.
Hisham Sabbagh Elias P. Bamidis Alexander Keller Thomas Stocker Uwe Baumert Lea Hoffmann Andrea Wichelhaus 《Orthodontics & craniofacial research》2023,26(3):433-441
Objective
Tooth movement with elastic chains requires defined force magnitudes. This study assessed the force behaviour of different elastic chains at different configurations of gap width.Methods
Self-ligating brackets of teeth 5 & 6 and 2 & 3 were bonded to two movable aluminium plates. The plates were positioned on a joint basis with varying distances of 0.5, 2.0, 4.0, 6.0, and 8.0 mm. Reset forces of open and closed chains from four different manufacturers were investigated in four different configurations. Configurations differed in either having an additional intermediate ring within the gap (#1, #3) and/or having intermediate rings between teeth adjacent to the gap (#1, #2), or by no intermediate rings (#4). Forces were measured with a universal testing machine. The results were statistically analysed using U-test, H-test and (if applicable) post-hoc tests with a significance level of .05.Results
Configurations #1 and #3, and #2 and #4 formed homogenous subgroups (P < .001). Initial forces in configuration #4 were significantly higher than in configuration #3 (P = .029). Initial forces in closed chains were significantly higher than for open chains (P = .029).Conclusions
Intermediate chain rings adjacent to the gap are not required to modulate the force. In contrast, leaving a ring unapplied in the tooth gap can help modulate the force. Open thermoset chains with an additional ring within the gap (#3) seem to produce suitable initial forces for a gap closure of 4 mm. With a residual gap width of <2 mm, open thermoset chains and closed thermoset chains (#4) seem suitable. 相似文献783.
Lukas Stolz Mathias Orban Nicole Karam Edith Lubos Mirjam Wild Ludwig Weckbach Thomas J. Stocker Fabien Praz Daniel Braun Kornelia Löw Sebastian Hausleiter Konstantin Stark Philipp Doldi Noemie Tence Martin Orban Satoshi Higuchi Magda Haum Stephan Windecker Christian Hagl Julia Mayerle Michael Näbauer Daniel Kalbacher Steffen Massberg Jörg Hausleiter 《European journal of heart failure》2023,25(6):872-884