Co-crystallization of 4,4'-methyl-enediphenyl-amine (MDA) and 5-sulfosalicylic acid (5-H(2)SSA) yields the title salt, C(13)H(16)N(2) (2+)·2C(7)H(5)O(6)S(-)·H(2)O. The asymmetric unit is comprised of one dication, two anions and one water mol-ecule. In the crystal structure, the components of the salt are linked by a combination of inter-molecular O-H⋯O, N-H⋯O and weak C-H⋯O hydrogen bonds into...

HIS STUDY WAS UNDERTAKEN IN AN ATTEMPT to evaluate some of the more promising methods for the determination of cerebrospinal fluid protein with the objective of deciding on the most suitable one for use in this laboratory. There are a number of methods available, with great variations in the ease of performance and the accuracy of results; therefore it seems that some sort of compromise must be...

The structures of the 1:1 anhydrous salts of nicotine (NIC) with 3,5-di-nitro-salicylic acid (DNSA) and 5-sulfosalicylic acid (5-SSA), namely (1R,2S)-1-methyl-2-(pyridin-3-yl)-1H-pyrrolidin-1-ium 2-carb-oxy-4,6-di-nitro-phenolate, C10H15N2 (+)·C7H3N2O7 (-), (I), and (1R,2S)-1-methyl-2-(pyridin-3-yl)-1H-pyrrolidin-1-ium 3-carb-oxy-4-hy-droxy-benzene-sulfonate, C10H15N2 (+)·C7H5O6S(-), (II), are ...

The presence in plasma of protein-like materials with properties of polypeptides or proteoses has been demonstrated repeatedly, but little has been done toward the characterization of these materials. The concentration of such materials in plasma rises markedly in patients with cancer or with certain other diseases, but here again little is known of the source or significance of the increased l...

Plasma protein fractions show characteristic differences in their polarographic behavior after being subjected to alkaline digestion. Serum albumin (fraction V) in particular is unique in that it produces a catalytic double-wave in divalent cobalt buffer which increases markedly during the first 10 20 minutes of digestion and then decreases gradually during the following hour. During this same ...