Monotone iterative procedure and systems of a finite number of nonlinear fractional differential equations

The aim of the paper is to present a nontrivial and natural extension of the comparison result and the monotone iterative procedure based on upper and lower solutions, which were recently established in (Wang et al. in Appl. Math. Lett. 25:1019-1024, 2012), to the case of any finite number of nonlinear fractional differential equations.The author is very grateful to the reviewers for the remarks, which improved the final version of the manuscript. This article was financially supported by University of Łódź as a part of donation for the research activities aimed at the development of young scientists, grant no. 545/1117

Molecular Characterization of Glycopeptide-Resistant Enterococci from Hospitals of the Picardy Region (France)

We studied 138 glycopeptide-resistant enterococci (GRE) strains, consisting of 131 glycopeptide-resistant Enterococcus faecium (GREfm) and 7 glycopeptide-resistant Enterococcus faecalis (GREfs). The GREfm strains were resistant to penicillin, ampicillin, vancomycin, and teicoplanin, while the GREfs strains were only resistant to vancomycin and teicoplanin. The van A gene was the only glycopeptide determinant present in all GRE isolates investigated. Genes coding for Hyl and Hyl+ Esp were detected in 39 (29.8%) and 92 (70.2%) of the 131 GREfm isolates, respectively. Three of the 7 GREfs were positive for gelE+asa 1 genes, 3 for gel E gene, and 1 for asa 1 gene. The genetic relationship between the 138 GRE was analyzed by pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST). GREfm isolates were clustered in a single genogroup (pulsotype A), and GREfs were clustered in six genogroups (pulsotypes B-G). Among the isolates investigated by MLST, only 18 PCR products were sequenced (12 E. faecium and 6 E. faecalis), and 9 sequence types (STs) were identified

Investigation of New 2D Half Metallic Ferromagnetic Materials

In this work, we studied doping of pure hafnium disulfide (HfS2) by nonmagnetic atoms C and N. This doping was carried out by the substitution of a host atom S by doping atom C or N. The purpose of this work is to search new half-metallic material for the field of spintronics. This theoretical study is based on density functional theory (DFT) and GGA-PBE approximation. Our calculation revealed that the HfS2 binary material doping with carbon and nitrogen induces strong magnetism and predicts new doped materials HfS2-C and HfS2-N. Their magnetic moments are respectively 2[Formula: see text] and 1[Formula: see text]. The host atoms Hf and the doping atoms induce a strong magnetic moment, while the host atoms S introduce a weak magnetic moment. This magnetism results fundamentally from the coupling between the Hf-5d states and the X-2p states (X = C and N). These two new materials will be promising for the spintronic domain. </jats:p