The title compound, a selenonium bromide, C17H33OSeSi+·Br−, was obtained from the reaction of enantiomerically pure 4,7,7-trimethyl-2-methylselanylbicyclo[2.2.1]heptan-3-ol read more and (3-bromopropenyl)trimethylsilane in acetone.Due to the chiral bicyclic substituent, the crystal structure is not centrosymmetric and has no symmetry pla
The operation disturbance induced by the solar array drive system (SADS) and the residual vibration of solar array following the attitude adjustment of the spacecraft obviously affect the dynamics environment, quick here stabilization, and attitude stability of the high-precision spacecraft.However, these two kinds of vibration disturbance are char
Small wind turbines (SWTs) have become increasingly common within the last decade, but their impact on wildlife, especially bats, is largely unknown.We conducted an operational experiment by sequentially placing a mobile SWT kt196 torque converter with five different operational modes at six sites of high bat activity, including roosts, commuting s
The norms of humanitarian intervention have gained notoriety after historical events of mass atrocities against civilians.In this context, the principle of Responsibility read more to Protect (R2P) emerged in 2001.Its tipping point was given through Resolution No.1973 in 2011 - issued by the UN Security Council - which resulted in the intervention
One of the most important and challenging click here tasks of an educational system is delivering "citizenship education".Even though this mission is of great concern to most countries, in Iran it has neither received enough attention, nor has a problem based approach taken place to educate the citizens to confront problems at the time of crisis.Th