Fixed points for non-surjective expansion mappings

The contractive conditions of Popa (Demonstr. Math. 1990, 23, 213-218) were further improved for four non-surjective expansion mappings, and some common fixed point theorems under semi-compatible pairs of mappings are proved. Our main findings bring improvements to a number of results in the non-metric setting. Some implications for mathematical physics are raised with respect to physical invariant

Sterol and Fatty Acid Composition of Candida lusitaniae Clinical Isolates

The sterol and fatty acid compositions of four amphotericin B-resistant and of two amphotericin B-susceptible Candida lusitaniae clinical isolates were determined. A flow cytofluorometric susceptibility test (FCST) with a membrane potential-sensitive cationic dye was used as a complement to the conventional method for selecting the isolates. Compared to susceptible isolates, resistant ones showed a greatly reduced ergosterol content and changes in sterol composition, consistent with a defect in Δ8→7 isomerase. Within each group, no correlation between the sterol or fatty acid pattern or composition and both the degree of in vitro susceptibility and FCST MIC was found

Chemical modification and stability of the cell wall phosphopeptidomannans of flocculent and weakly flocculent Kluyveromyces bulgaricus cells

International audienc

Synthesis of new oligosaccharidyl-thio-β-cyclodextrins (CDS): A novel family of potent drug-targetting vectors

International audienc