The structures were determined on the basis of spectroscopic data (1D,
2D NMR and MS) and by comparison with literature values.”
“Craniocervical arterial dissection is an important cause of childhood arterial ischemic stroke, accounting for 7.5% to 20% of cases. Significant neurologic morbidity and mortality may result and recurrence risk may be higher than in adults. However, the natural history and long-term Outcome of pediatric dissection are poorly Studied. We report 3 cases of extracranial vertebral artery dissection with complications including pseudoaneurysm JNJ-64619178 cost formation, recurrent stroke, and late spontaneous thrombosis of the dissected artery. These cases illustrate the dynamic processes involved in vascular injury and healing of vertebral artery dissection in children over years, with potential implications for long-term management and prevention of recurrence.”
“The effect of periodic rectangular
grooves on vacuum multipactor has been theoretically and experimentally investigated. Dynamic calculation PF-562271 price is applied to research the electron trajectory and impact energy under groove surface. Two-dimensional electromagnetic particle-in-cell simulation is used to analyze and compare multipactor scenario, statistic energy, and secondary emission yield on the flat surface with that on the corrugated AP26113 purchase surface. It has been found by computational and simulative analysis
that grooved surface can explicitly suppress multipactor in the developmental stage of multipactor. S-band high power microwave (HPM) dielectric breakdown experiment under vacuum, with microsecond pulse length was conducted. It was confirmed by experiment that periodic grooves perpendicular to the major electric field can effectively increase transmitted power. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3153947]“
“Orientin and vitexin are the two main bioactive compounds in Trollius chinensis Bunge. In this study, a rapid method was established for the isolation and purification of orientin and vitexin from T.