(E)-4-[4-(Dimethyl­amino)benzyl­ideneamino]benzonitrile

The mol­ecule of the title compound, C16H15N3, displays a trans configuration with respect to the C=N double bond. The mol­ecule is not planar, the dihedral angle between the benzene rings being 57.83 (9)°. The crystal packing is stabilized only by van der Waals inter­actions

(E)-3-[(4-Diethyl­amino-2-hydroxy­benzyl­idene)amino]benzonitrile

The mol­ecule of the title compound, C18H19N3O, displays a trans configuration with respect to the C=N double bond. There is a strong intra­molecular O—H⋯N hydrogen-bonding inter­action between the hydr­oxy group and imine N atom. The dihedral angle between the aromatic rings is 30.35 (8)°. The crystal packing is stabilized by O—H⋯N links

1-(4-tert-Butyl­benz­yl)-2-(4-tert-butyl­phen­yl)-1H-benzimidazole

In the mol­ecule of the title compound, C28H32N2, the benzimidazole ring system is almost planar [maximum deviation = 0.0221 (15) Å] and forms dihedral angles of 85.86 (4) and 32.09 (6)° with the benzene rings. In the crystal structure, mol­ecules are linked into chains running parallel to the a axis by inter­molecular C—H⋯N hydrogen bonds. The methyl groups of a tert-butyl group are rotationally disordered over two positions with refined site-occupancy factors of 0.636 (4) and 0.364 (4)

Physiological and Metabolomic Alterations in Macrocystis pyrifera upon Exposure to Chromium(VI)

1593-1599In order to comprehensively characterize the effects of chromium (VI) on physiological and metabonomic performance of Macrocystis pyrifera, the sporophytes were exposed to 2 mg L-1 potassium dichromate for 3 days. M. pyrifera sporophytes showed decreased pigment content and Chla fuloresecnece parameters with the accumulation of Cr(VI). The carbon content was clearly increased, while the content of nitrogen, hydrogen and sulfur were little changed. Moreover, an untargeted metabolomic analysis was carried out in order to investigate the metabolic effects and to obtain a comprehensive profiling of induced metabolites during Cr stress. Absolute quantification of 14 different metabolites was obtained through GC-MS methods. The principal component analysis showed a clear separation between control and Cr treated samples. Some pathways including carbon fixation, sulfur metabolism, taurine and hypotaurine metabolism were affected by Cr (VI) stress. These findings provided valuable information to elucidate the mechanism of M. pyrifera upon Cr (VI) stress