Two essentially isogenic strains of Escherichia coli K-12 were compared: D31 had chromosomally and D1-R1 episomally mediated resistance to ampicillin. The two strains had the same ability to form colonies on ampicillin plates, but in other tests they were quite different. In serial dilution tests as well as in exponentially growing cultures, D1-R1 was far more resistant to ampicillin than was D...

Measurement of 13C-labeled fatty acid oxidation is hindered by the need for acetate correction, measurement of the rate of CO2 production in a controlled environment, and frequent collection of breath samples. The use of deuterium-labeled fatty acids may overcome these limitations. Herein, d31-palmitate was validated against [1-13C]palmitate during exercise. Thirteen subjects with body mass ind...

The study has obtained composite systems containing porous polyvinylidene fluoride films and electroconducting polymers—polyaniline polypyrrole. Porous supports were prepared by melt extrusion. It was shown scanning electron atomic force microscopy that PVDF have a relief surface, higher surface roughness improves hydrophilicity of supports. layers conducting polymers on the formed oxidative po...

The culture growth and carotenogenic activity of two Greek Dunaliella salina strains (AthU-Al D30 AthU-Al D31) under stress conditions are investigated herein, with emphasis on β-carotene production as well lutein zeaxanthin. In particular, the were cultivated in “standard” (60 ‰ salinity 1.18 M NaNO3), (160 NaNO3) nitrogen deprivation 0 NaNO3). addition to strains, D. CCAP 19/18 strain, which ...