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Random crystal field effect on hysteresis loops and compensation behavior of mixed spin-(1,3/2) Ising system

Chinese Physics B 2017年第12期26卷 538-547页

作者： k htoutou Y Benhouria A Oubelkacem R Ahl laamara L B Drissi LPHE-Modeling and Simulations Faculty of Sciences Mohammed V University in Rabat Morocco Center Regional des Metiers de l'Education et de la Formation (CRMEF) Fes-Meknes Marocco LP2MS University of Moulay Ismail Faculty of Sciences Meknes Morocco Center of Physics and Mathematics CPM-Morocco

Magnetic hysteresis and compensation behavior of a mixed spin-（1, 3/2） Ising model on a square lattice are investigated in the framework of effective field theory based on a probability distribution technique. The effect of random crystal field, ferromagnetic and ferrimagnetic exchange interaction on hysteresis loops and compensation phenomenon are discussed. A number of characteristic phenomena have been reported such as the observation of triple hysteresis loops at low temperatures and for negative values of random crystal field. Critical and double compensation temperatures have been also found. The obtained results are also compared to some previous works.

关键词： ferrimagnetic mixed Ising system effective field theory hysteresis loops compensation behaviors

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Analysis of Enterobacteriaceae Producing Broad-Spectrum Beta-Lactamases in the Intensive Care Unit Setting

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Open Journal of Medical Microbiology 2013年第1期3卷 56-61页

作者： Vendula Husickova Miroslava htoutou-Sedlakova Ivanka Matouskova Magdalena Chroma Milan kolar Department of Microbiology Faculty of Medicine and DentistryPalacky University OlomoucOlomoucCzech Republic University Hospital Olomouc OlomoucCzech Republic Department of Preventive Medicine Faculty of Medicine and DentistryPalacky University OlomoucOlomoucCzech Republic

Strains of the Enterobacteriaceae family producing ESBL and AmpC broad-spectrum beta-lactamases that may survive in the hospital setting potentially cause infection in hospitalized patients due to contaminated objects or health care workers’ hands. Over a period of two months (November-December 2010), a single epidemiological study of microbial contamination of air, surfaces and health care workers (swabs from both nostrils and the right hand without a glove) was carried out at two intensive care units of the University Hospital Olomouc, Czech Republic. The bacteria were identified using standard microbiological methods. Phenotypic detection of ESBL and AmpC enzymes and basic genetic analysis of ESBL- and AmpC-positive isolates was performed. The same approach was used to identify and analyze bacteria isolated from clinical samples of patients hospitalized at the above departments over the study period. From a total of 140 environmental samples collected over the study period, 21 isolates of the Enterobacteriaceae family were identified, with ESBL and AmpC production being detected in 4 and 7 isolates, respectively. Among patients’ clinical samples, 10 ESBL- and 6 AmpC-positive isolates were detected. No similarity was found between environmental isolates and strains isolated from patients.

关键词： Enterobacteriaceae Broad-Spectrum Beta-Lactamases Intensive Care Setting

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