2,077 research outputs found
ScientistsĘĽ warning on climate change and medicinal plants
The recent publication of a World ScientistsĘĽ Warning to Humanity highlighted the fact that climate change, absent strenuous mitigation or adaptation efforts, will have profound negative effects for humanity and other species, affecting numerous aspects of life. In this paper, we call attention to one of these aspects, the effects of climate change on medicinal plants. These plants provide many benefits for human health, particularly in communities where Western medicine is unavailable. As for other species, their populations may be threatened by changing temperature and precipitation regimes, disruption of commensal relationships, and increases in pests and pathogens, combined with anthropogenic habitat fragmentation that impedes migration. Additionally, medicinal species are often harvested unsustainably, and this combination of pressures may push many populations to extinction. A second issue is that some species may respond to increased environmental stresses not only with declines in biomass production but with changes in chemical content, potentially affecting quality or even safety of medicinal products. We therefore recommend actions including conservation and local cultivation of valued plants, sustainability training for harvesters and certification of commercial material, preservation of traditional knowledge, and programs to monitor raw material quality in addition to, of course, efforts to mitigate climate change
General practice registration networks in the Netherlands: a brief report
In the Netherlands, several general practice registrations exist. Groups
of general practitioners register elements of patient care according to
agreed-upon criteria, and these data are collected in a central database.
By means of a questionnaire the authors interviewed the managers of all
nine computerized registration networks extensively about the
possibilities and limitations of their registration. In addition,
respondents answered some questions with data from the central database of
their network. Various items are collected by nearly all the registration
networks, while other items are collected by only one network. Answering
questions with data from the central database turned out to be difficult.
Organization and manpower are the main obstacles
Increasing microbiological confirmation and changing epidemiology of meningococcal disease on Merseyside, England
ObjectivesTo determine, for the last 5 years in children on Merseyside with clinical meningococcal disease (MCD), the impact on diagnostic yield of newer bacteriologic methods; bacterial antigen detection (AD) and polymerase chain reaction (PCR).MethodsProspective data collection at Royal Liverpool Children's Hospital over two epochs: 1 September 1992 to 30 April 1994 (epoch A, n = 126) and 17 November 1997 to 15 September 1998 (epoch B, n = 85).ResultsEpoch Awas compared with epoch B. Diagnosis was confirmed by detection of meningococci in 78 of 126 (61.9%) versus 64 of 85 (75.3%, P = 0.04), but with a significantly lower rate of positive blood and cerebrospinal fluid culture in the later epoch. The proportion of cases receiving penicillin pretreatment was unchanged at 32%, but the proportion undergoing lumbar puncture decreased significantly. Median ages were higher in epoch B: 1.7 years versus 2.49 years (P = 0.013, Mann-Whitney). There was a significant increase in the proportion of cases due to serogroup C (14/78 (18%) versus 30/64 (46.9%), P = 0.001).ConclusionsCulture detection of meningococci from children with MCD has reduced, as less lumbar punctures are done. However, improved diagnosis by PCR and AD has increased microbiological confirmation overall. Serogroup C disease and the median age of cases continue to rise
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RESVERATROL ATTENUATES EXERCISE-INDUCED ADAPTIVE RESPONSES IN RATS SELECTIVELY BRED FOR LOW RUNNING PERFORMANCE
Low capacity runner (LCR) rats have been developed by divergent artificial selection for treadmill endurance capacity to explore an aerobic biology-disease connection. The beneficial effects of resveratrol supplementation have been demonstrated in endurance running. In this study it was examined whether 12 weeks of treadmill exercise training and/or resveratrol can retrieve the low running performance of the LCR and impact mitochondrial biogenesis and quality control. Resveratrol regressed running performance in trained LCR (p\u3c0.05). Surprisingly, exercise and resveratrol treatments significantly decreased pAMPK/AMPK, SIRT1, SIRT4, forkhead transcription factor 1 (FOXO1) and mitochondrial transcription factor A (TFAM) levels in these animals (p\u3c0.05). Mitochondrial fusion protein, HSP78 and polynucleotide phosphorylase were significantly induced in LCR-trained, LCR-resveratrol treated, LCR-trained and resveratol treated groups compared to LCR-controls. The data indicate that the AMPK-SIRT1-NAMPTFOXO1 axis could be important to the limited aerobic endurance capacity of low running capacity rats. Resveratrol supplementation was not beneficial in terms of aerobic endurance performance, mitochondrial biogenesis, or quality control
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Rallying the Troops: Collective Action and Self-Interest in UN Peacekeeping Contributions
Is the acquisition of personnel for UN peacekeeping missions susceptible to free-riding by UN member states? If so, what drives this behavior and what impact does this have on obtaining required personnel for the mission? Using data from 21 missions in 13 African countries between 1990 and 2010, this article addresses whether UN peacekeeping missions experience a shortfall in personnel due to incentives to free-ride by contributing states. It argues that as the number of states contributing to a mission increases, contributors have a greater incentive to free-ride and make suboptimal personnel contributions, leading to greater overall shortfall in the mission’s personnel. However, this free-riding behavior can be mitigated by the economic incentives of contributor states. The findings support two central tenets of collective action theory: that free-riding by member states contributing to the mission is more prevalent when the number of contributors is larger, and when selective incentives such as economic gains are lower. These findings have implications for the strategic composition and efficacy of peacekeeping forces. More broadly, the results underscore the struggle of international organizations to obtain compliance from member states in achieving their international objectives
Neuropeptide Y polymorphism significantly magnifies diabetes and cardiovascular disease risk in obesity: the Hoorn Study
0.001) in the obese but not in the nonobese subjects. The results indicate that obesity may be a pivotal factor in multiplying the disease risk associated with the Leu7Pro polymorphism in preproNP
Unitarized Chiral Perturbation Theory in a finite volume: scalar meson sector
We develop a scheme for the extraction of the properties of the scalar mesons
f0(600), f0(980), and a0(980) from lattice QCD data. This scheme is based on a
two-channel chiral unitary approach with fully relativistic propagators in a
finite volume. In order to discuss the feasibility of finding the mass and
width of the scalar resonances, we analyze synthetic lattice data with a fixed
error assigned, and show that the framework can be indeed used for an accurate
determination of resonance pole positions in the multi-channel scattering.Comment: 15 pages, 17 figure
Adventures in boron chemistry – the prediction of novel ultra-flexible boron oxide frameworks
We predict a wide range of ultra-flexible low-energy forms of boron oxides in which rigid B–O–B bridges link boron–oxygen heterocycles.</p
The , interaction in finite volume and the resonance
In this work the interaction of the coupled channels and
in an SU(4) extrapolation of the chiral unitary theory, where the
resonance appears as dynamically generated from that
interaction, is extended to produce results in finite volume. Energy levels in
the finite box are evaluated and, assuming that they would correspond to
lattice results, the inverse problem of determining the phase shifts in the
infinite volume from the lattice results is solved. We observe that it is
possible to obtain accurate phase shifts and the position of the
resonance, but it requires the explicit consideration of the
two coupled channels. We also observe that some of the energy levels in the box
are attached to the closed channel, such that their use to induce the phase shifts via L\"uscher's formula leads to incorrect results.Comment: 10 pages, 13 figures, accepted for publication in Eur. Phys. J.
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