20 research outputs found
Enhanced magnetocaloric effect in frustrated magnetic molecules with icosahedral symmetry
We investigate the magnetocaloric properties of certain antiferromagnetic
spin systems that have already been or very likely can be synthesized as
magnetic molecules. It turns out that the special geometric frustration which
is present in antiferromagnets that consist of corner-sharing triangles leads
to an enhanced magnetocaloric effect with high cooling rates in the vicinity of
the saturation field. These findings are compared with the behavior of a simple
unfrustrated spin ring as well as with the properties of the icosahedron. To
our surprise, also for the icosahedron large cooling rates can be achieved but
due to a different kind of geometric frustration.Comment: 5 pages, 8 figures, more information at
http://obelix.physik.uni-osnabrueck.de/~schnack
Predictors for pathologically confirmed aortitis after resection of the ascending aorta: A 12-year Danish nationwide population-based cross-sectional study
Feeding of the probiotic bacterium Enterococcus faecium NCIMB 10415 differentially affects shedding of enteric viruses in pigs
Effects of probiotic bacteria on viral infections have been described
previously. Here, two groups of sows and their piglets were fed with or
without feed supplementation of the probiotic bacterium Enterococcus faecium
NCIMB 10415. Shedding of enteric viruses naturally occurring in these pigs was
analyzed by quantitative real-time RT-PCR. No differences between the groups
were recorded for hepatitis E virus, encephalomyocarditis virus and norovirus.
In contrast, astrovirus was exclusively detected in the non-supplemented
control group. Rotavirus was shedded later and with lower amounts in the
probiotic piglet group (p < 0.05); rotavirus-shedding piglets gained less
weight than non-infected animals (p < 0.05). Serum titres of anti-rotavirus
IgA and IgG antibodies were higher in piglets from the control group, whereas
no difference was detected between sow groups. Phenotype analysis of immune
cell antigens revealed significant differences of the CD4 and CD8β (p < 0.05)
as well as CD8α and CD25 (p < 0.1) T cell populations of the probiotic
supplemented group compared to the non-supplemented control group. In
addition, differences were evident for CD21/MHCII-positive (p < 0.05) and IgM-
positive (p < 0.1) B cell populations. The results indicate that probiotic
bacteria could have effects on virus shedding in naturally infected pigs,
which depend on the virus type. These effects seem to be caused by
immunological changes; however, the distinct mechanism of action remains to be
elucidated
Renin-Angiotensin System Blockers and Adverse Outcomes of Influenza and Pneumonia:A Danish Cohort Study
Readmission and mortality in patients discharged with a diagnosis of medical observation and evaluation (Z03*-codes) from an acute admission unit in Denmark: a prospective cohort study
Feeding of the probiotic bacterium <it>Enterococcus faecium</it> NCIMB 10415 differentially affects shedding of enteric viruses in pigs
Abstract Effects of probiotic bacteria on viral infections have been described previously. Here, two groups of sows and their piglets were fed with or without feed supplementation of the probiotic bacterium Enterococcus faecium NCIMB 10415. Shedding of enteric viruses naturally occurring in these pigs was analyzed by quantitative real-time RT-PCR. No differences between the groups were recorded for hepatitis E virus, encephalomyocarditis virus and norovirus. In contrast, astrovirus was exclusively detected in the non-supplemented control group. Rotavirus was shedded later and with lower amounts in the probiotic piglet group (p p p p p p < 0.1) B cell populations. The results indicate that probiotic bacteria could have effects on virus shedding in naturally infected pigs, which depend on the virus type. These effects seem to be caused by immunological changes; however, the distinct mechanism of action remains to be elucidated.</p