The great inconvenience of this refrigeration technology is the damage caused to the environment by the refrigerant fluids. In this paper, we discuss the magnetic barocaloric effect, i.e., the heating or cooling of magnetic materials under pressure variation and its application in the construction of refrigerators using solid magnetic compounds as refrigerant materials and pressure as the external agent. The discussion presented in this paper points out that such a pressure induced solid state refrigerator can be very
interesting because it is not harmful to the environment and can exhibit a good performance. (C) 2011 American Institute learn more of Physics. [doi: 10.1063/1.3556740]“
“The characteristic properties of carbon nanotubes (CNTs), particularly their heat conduction, electrical conductivity, high modulus of elasticity, high strength, and resistance to chemicals, have resulted in widespread application of CNTs in nanotechnologies. In this study, CNTs were used to impart specific functionality to textiles by printing techniques. To this aim, modified commercial aqueous dispersions of multiwalled CNTs from Nanocyl (R) were click here used for preparing special compositions as paste for printing by conventional techniques (screen printing)
and as inks for ink-jet printing to bestow the fabric antistatic and antibacterial properties. Taking into account the importance of the dispersion level of CNT in the printing composition from the point of view of antistatic properties, the quality of the CNT dispersion was assessed on the basis of particle size distribution by means of a DLS PSS Nicomp device. Printings were done on two types of woven check details fabrics: 100% cotton and 30/70% cotton/polyester blend. The CNTs used in printing were found to impart antistatic and antibacterial properties to the printed fabrics. These imparted properties were resistant to repeated washing. (c) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 483-490, 2011″
“Background: The morbidity of Salmonella bloodstream infections is unacceptably high in Africa. In 2000, the WHO Global Salmonella-Surveillance (GSS) program was founded to reduce
the health burden of foodborne diseases. The incorporation, in 2002, of the Democratic Republic of Congo (DRC) in this program allowed the improvement of laboratory capacities. In this retrospective study, we describe the first signs of impact the GSS program has had in DRC in the management of bacteremia.
Methods: Between 2002 and 2006, we evaluated, in one pediatric hospital, the microbiologic and clinical features of Salmonella isolated from children suspected of having bacteremia. A random selection of isolates was typed by pulsed field gel electrophoresis (PFGE).
Results: Among the 1528 children included in the study, 26.8% were bacteremic. Salmonella accounted for 59% of all bloodstream infections. Salmonella typhimurium (60.