The concentrations of all components in the phases of aqueous two-phase polyethylene glycol-sodium sulfate system of a fixed composition with different concentrations of NaCl additive were determined. Solvatochromic solvent features of aqueous media in the phases of all the systems were characterized in terms of solvent dipolarity/polarizability, solvent hydrogen bond donor acidity and hydrogen...

The structure of title compound, C(6)H(6)NO(2) (+)·HSO(4) (-), comprises discrete ions which are inter-conected by N-H⋯O and O-H⋯O hydrogen bonds, leading to a neutral one-dimensional network along [001]. These hydrogen bonds appear to complement the Coulombic inter-action and help to stabilize the structure further.

All non-H atoms of the cation of the title salt, C(6)H(5)N(2) (+)·HSO(4) (-), are essentially coplanar [r.m.s. deviation = 0.005 (1) Å] . In the crystal, N-H⋯O and O-H⋯O hydrogen bonds and weak C-H⋯O and C-H⋯N inter-actions link the mol-ecules into a two-dimensional network parallel to the (001) plane. Weak π-π stacking inter-actions between the pyridine rings of neighbouring mol-ecules further...

In the title salt, C(7)H(8)N(3) (+)·HSO(4) (-), the benzimdazole ring system is planar [mean deviation 0.0086 (1) Å]. In the crystal, N-H⋯O and O-H⋯O hydrogen-bond inter-actions give rise to a layer motif.

The molecular weight of the major glycoprotein from the human erythrocyte membrane is 29,000, of which 55% is carbohydrate and 45% is protein. The binding of sodium dodecyl sulfate to this glycoprotein is anomalous when compared to water soluble proteins and leads to migration rates in sodium dodecyl sulfate-polyacrylamide gels that cannot be interpreted in terms of molecular weight. Anomalous ...