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Biochimica et biophysica acta, 984(3), 281-288 (1989-09-18)
Permeability coefficients (P) measured at various penetrant concentrations (C) by the perturbation method can be plotted to distinguish simple diffusion, simple pore kinetics and simple carrier kinetics as follows: for simple diffusion, 1/P = constant; for a simple pore, 1/P
Many microorganisms exhibit an adaptive response to mutagenic alkylation damage. In Escherichia coli the response is regulated by the inducible Ada protein. A sensitive immunoassay employing two anti-Ada monoclonal antibodies has been developed here to monitor low levels of induction
Japanese journal of cancer research : Gann, 88(9), 797-806 (1997-11-25)
For carcinogenic risk assessment of combinations of N-nitroso precursors in man, the effects of feeding methylurea (MU) or morpholine (Mor) plus sodium nitrite (NaNO2) were investigated using a multi-organ carcinogenesis model. In experiment 1, to initiate multiple organs, groups of
Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 25(9), 663-668 (1987-09-01)
The formation of N-nitrosomethylurea (NMU) from methylurea (MU) and sodium nitrite in the guinea-pig stomach and the disappearance of NMU from the stomach were studied using a previously described method for NMU determination (Yamamoto et al. Fd Chem. Toxic. 1986
Colloids and surfaces. B, Biointerfaces, 51(1), 10-15 (2006-06-30)
The present study highlights the fact that the effect of additives (urea, monomethylurea, thiourea) on the supramolecular assemblies and proteins is strikingly similar. To investigate the effect, a viscometeric study on sphere-to-rod transition (s-->r) was undertaken in a system (3.5%
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