Röhre 2D21 ID4224, Thyratron

2d 21 In this work, we introduce helical chirality into 2D COFs using confurationally stable enantiopure and racemic [5]helicenes as linkers in. 21 Draw is an on learning munity where students of all skill levels can learn how to be a better artist. Our contributing artists and instructors are the best in the world.

2d 71, 21Cineplex Official Site.