Ueber Azonium-Verbindungen aus Benzil

Benzil bis­(ketazine)

THE TITLE COMPOUND (SYSTEMATIC NAME 1,1',2,2'-tetra-phenyl-2,2'-azinodiethanone), C(28)H(20)N(2)O(2), was obtained by the reaction of benzil monohydrazone with chromium(III) nitrate. The dibenzyl-idene hydrazine unit is nearly planar (r.m.s. deviation = 0.073 Å) and the two benzoyl units are oriented almost perpendicular to it [dihedral angle = 87.81 (2), 87.81 (2)°]. The mol-ecules are linked ...

Hippokrates Ueber die Krankheiten III

irrelevant. Chemistry and the relations between science, technology, and industry are well surveyed by Crosland and Cardwell respectively. Forbes's essay on mathematical cosmography is not a comprehensive account but the story (albeit interesting) of a few German cartographers. Compared with other recent collections of essays in the history of science, this volume parades no party line: witness...

Ueber Das Verschwinden Der Θ-functionen

Ueber Die Fortpflanzung Ebener Luftwellen Von Endlicher Schwingungsweite

[Aus dem achten Bande der Abhandlungen der Königlichen Gesellschaft der Wissenschaften zu Göttingen. 1860.]

Cv. the Azine and Azonium Compounds of the Proteolytic Enzymes

THE immense importance of the establishment of the chemical nature of the proteolytic enzymes has led to many endeavours to purify them. From the earliest attempts of Schwann [1836] to the present day all these have met with obvious failure. In 1905 it was observed by T. Brailsford Robertson [1907] that if one drop of saturated safranine (Griibler) is added to a solution of trypsin (Griibler) a...