A number ofprocedures have been proposed for the isolation of glycine from protein hydrolysates. The ester method originally described by Fischer (1901) is laborious and involves great losses, owing largely to incomplete precipitation of glycine ester hydrochloride and the volatility of the free ester. The precipitation of glycine as its barium carbamate (Kingston & Schryver, 1924) is time-cons...

In the title complex, [Mn(C₆H₂N₃O₇)₂(C₃₀H₂₆N₄O)], the Mn(II) atom is coordinated by the tridentate bis-benzimidazole ligand and two atoms of the picrate anions, in a distorted square-pyramidal geometry (τ = 0.038). One nitro O atom of one picrate ion is disordered over two sites with occupancies of 0.54 (5) and 0.46 (5).

Greenwald and Lewman (1) described a method in which the protein and carbonic acid of blood are removed by picric acid, so that the alkali of the proteinates and bicarbonate is replaced by an equivalent of alkali picrate, which is measured. The picric acid precipitates the protein and frees the COZ, which is boiled off from the filtrate. The alkali picrate is measured as total picric acid minus...

The present investigation deals with the development of a convenient method for the isolation of alanine and proline from protein hydrolysates. In this work the authors aim to eliminate some of the objections inherent in the older methods (l-6). No expensive reagents are required for the separation of these amino acids, and high yields of the pure final products are secured. In a recent publica...

The title compound {systematic name: 3-chloro-5-[3-(dimethyl-amino)prop-yl]-10,11-dihydro-5H-dibenz[b,f]azepinium picrate}, C(19)H(24)ClN(2) (+)·C(6)H(2)N(3)O(7) (-), crystallizes with two independent cation-anion pairs in the asymmetric unit. The chlorimipraminium cation contains two benzene rings (one with a chloro substituent) fused to a V-shaped seven-membered azepine ring whose mean planes...

In the title compound, C(9)H(14)N(+)·C(6)H(2)N(3)O(7) (-), the three nitro groups of the picrate anion are twisted out of the plane of the attached benzene ring; the dihedral angles are 32.8 (2), 10.5 (4) and 12.3 (4)°. The pyridinium cations and picrate anions are linked via bifurcated N-H⋯(O,O) hydrogen bonds. The ionic pairs are linked into a ribbon-like structure along [101] by C-H⋯O hydrog...