1,125 research outputs found
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The Same, and Not the Same Men’s Narratives of Adoptive Fatherhood after Primary Infertility
Operational Comparison of Three Electrofishing Systems
Three different electrofishing systems were compared to determine their relative efficiency with respect to species and numbers of fish collected. These results indicated that modifications or changes in electrofishing gear during a monitoring program should not be made unless it can be demonstrated that collecting efficiency is not altered
Observation of Magnetic Supercooling of the Transition to the Vortex State
We demonstrate that the transition from the high-field state to the vortex
state in a nanomagnetic disk shows the magnetic equivalent of supercooling.
This is evidence that this magnetic transition can be described in terms of a
modified Landau first-order phase transition. To accomplish this we have
measured the bulk magnetization of single magnetic disks using nanomechanical
torsional resonator torque magnetometry. This allows observation of single
vortex creation events without averaging over an array of disks or over
multiple runs.Comment: 11 pages preprint, 4 figures, accepted to New Journal of Physic
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Trends in instrumentation for environmental radiation measurements at Los Alamos Scientific Laboratory
Recent instruments developed to fulfill radiation monitoring needs at Los Alamos Scientific Laboratory are described. Laboratory instruments that measure tritium gas effluents alone, or in the presence of activated air from D-T fusion reactors are discussed. Fully portable systems for gamma, x-ray, and alpha analyses in the field are described. Also included are descriptions of survey instruments that measure low levels of transuranic contaminants and that measure pulsed-neutron dose rates
HDAC3 is a molecular brake of the metabolic switch supporting white adipose tissue browning.
White adipose tissue (WAT) can undergo a phenotypic switch, known as browning, in response to environmental stimuli such as cold. Post-translational modifications of histones have been shown to regulate cellular energy metabolism, but their role in white adipose tissue physiology remains incompletely understood. Here we show that histone deacetylase 3 (HDAC3) regulates WAT metabolism and function. Selective ablation of Hdac3 in fat switches the metabolic signature of WAT by activating a futile cycle of de novo fatty acid synthesis and β-oxidation that potentiates WAT oxidative capacity and ultimately supports browning. Specific ablation of Hdac3 in adipose tissue increases acetylation of enhancers in Pparg and Ucp1 genes, and of putative regulatory regions of the Ppara gene. Our results unveil HDAC3 as a regulator of WAT physiology, which acts as a molecular brake that inhibits fatty acid metabolism and WAT browning.Histone deacetylases, such as HDAC3, have been shown to alter cellular metabolism in various tissues. Here the authors show that HDAC3 regulates WAT metabolism by activating a futile cycle of fatty acid synthesis and oxidation, which supports WAT browning
Conceptual learning : the priority for higher education
The common sense notion of learning as the all-pervasive acquisition of new behaviour and knowledge, made vivid by experience, is an incomplete characterisation, because it assumes that the learning of behaviour and the learning of knowledge are indistinguishable, and that acquisition constitutes learning without reference to transfer. A psychological level of analysis is used to argue that conceptual learning should have priority in higher education
Magnetic Ordering in the Ising Antiferromagnetic Pyrochlore Nd2ScNbO7
The question of structural disorder and its effects on magnetism is relevant
to a number of spin liquid candidate materials. Although commonly thought of as
a route to spin glass behavior, here we describe a system in which the
structural disorder results in long-range antiferromagnetic order due to local
symmetry breaking. NdScNbO is shown to have a dispersionless gapped
excitation observed in other neodymium pyrochlores below T = 0.37 K through
polarized and inelastic neutron scattering. However the dispersing spin waves
are not observed. This excited mode is shown to occur in only 14(2) \% of the
neodymium ions through spectroscopy and is consistent with total scattering
measurements as well as the magnitude of the dynamic moment 0.26(2) .
The remaining magnetic species order completely into the all-in all-out Ising
antiferromagnetic structure. This can be seen as a result of local symmetry
breaking due disordered Sc and Nb ions about the A-site. From
this work, it has been established that B-site disorder restores the
dipole-like behaviour of the Nd ions compared to the NdBO
parent series
Time Marches on, and So Does the History of Public Relations
Editor's Introduction to History of Public Relations special issu
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