Pyridinium hydrobromide perbromide (PyÂ·HBr 3) catalyzes effectively the aziridination of electron-deficient as well as electron-rich olefins using Chloramine-T (N-chloro-N-sodio-p-toluenesulfonamide) as a nitrogen source to afford the corresponding aziridines in moderate to good yields.
[ syll. vlat-ka, vl-a- tka ] The baby girl name Vlatka is pronounced VL EY TKAH â . Vlatka is of Croatian origin and it is used mainly in the Slavic language. The name means 'queen'.Vlatka is not regularly used as a baby girl name. It is not listed in the top 1000.Baby names that sound like Vlatka include Valdah, Valdis, Valida, Vallda, Valletta (Italian), Vileta, Viletta, Villeta, Villetta, Villettah, Vivalda, Voleta, Voletah, Voletta, Volita, Volitta, Volyta, Volytta, Vyleta, and Vyletta.t is not listed in the top 1000. Baby names that sound like Vlatka include Valdah, Valdis, Valida, Vallda, Valletta (Italian), Vileta, Viletta, Villeta, Villetta, Villettah, Vivalda, Voleta, Voletah, Voletta, Volita, Volitta, Volyta, Volytta, Vyleta, and Vyletta.
Vitamin K antagonists (VKA) are a group of substances that reduce blood clotting by reducing the action of vitamin K. They are used as anticoagulant medications in the prevention of thrombosis, and in pest control, as rodenticides. 1  1 Mechanism of action. 2  2 Coumarins (4-hydroxycoumarins)  3 Other VKAs.