Concentrations of total phenols and antioxidant activity in apple do not differ between conventional and organic orchard Management

Reprint Address: Yuri, JA (reprint author), Talca Univ, Agr Sci Fac, Pomaceas Ctr, Talca, Chile.The apple is one of the most widely consumed fresh fruits in the world. It constitutes a major contribution of phytochemical compounds to the diet, which are associated with a reduced risk to develop degenerative diseases. The main objective of this study was to evaluate the effects of conventional and organic management of apple cultivation, the stage of development and sunburn damage on polyphenol concentrations, antioxidant activity and pigments in three apple cultivars. Two experiments were carried out during the 2009/2010 season to study (1) the effect of the type of management and the development stage of the fruit during the season on the concentration and content of total and specific phenolics, antioxidant activity in the whole fruit, and pigments (chlorophylls, carotenoids and anthocyanins) in the peel of cvs. Gala (Galaxy and Brookfield), Granny Smith and Fuji (Raku Raku and Stripped) and (2) the effect of the type of management and the presence of sunburn at harvest on phenolics concentrations and antioxidant activity in both the whole fruit and peel, as well as pigments in peel, in two cultivars. Phenolics concentrations and antioxidant activity increased in the First weeks of fruit development and then decreased until harvest. The concentration of chlorophyll and carotenoids tended to decrease throughout the season, while anthocyanin concentration increased. In the case of tissue damaged by sunburn, phenolics concentrations and antioxidant activity were higher in damaged fruit, while changes in pigment concentrations varied according to the cultivar. The practices of conventional and organic management did neither influence significantly phenolics and pigments concentrations and antioxidant activity, except at certain stages of fruit development

Kinks in the Presence of Rapidly Varying Perturbations

Dynamics of sine-Gordon kinks in the presence of rapidly varying periodic perturbations of different physical origins is described analytically and numerically. The analytical approach is based on asymptotic expansions, and it allows to derive, in a rigorous way, an effective nonlinear equation for the slowly varying field component in any order of the asymptotic procedure as expansions in the small parameter $\omega^{-1}$, $\omega$ being the frequency of the rapidly varying ac driving force. Three physically important examples of such a dynamics, {\em i.e.}, kinks driven by a direct or parametric ac force, and kinks on rotating and oscillating background, are analysed in detail. It is shown that in the main order of the asymptotic procedure the effective equation for the slowly varying field component is {\em a renormalized sine-Gordon equation} in the case of the direct driving force or rotating (but phase-locked to an external ac force) background, and it is {\em the double sine-Gordon equation} for the parametric driving force. The properties of the kinks described by the renormalized nonlinear equations are analysed, and it is demonstrated analytically and numerically which kinds of physical phenomena may be expected in dealing with the renormalized, rather than the unrenormalized, nonlinear dynamics. In particular, we predict several qualitatively new effects which include, {\em e.g.}, the perturbation-inducedComment: New copy of the paper of the above title to replace the previous one, lost in the midst of the bulletin board. RevTeX 3.

Adjustment of the electric current in pulsar magnetospheres and origin of subpulse modulation

The subpulse modulation of pulsar radio emission goes to prove that the plasma flow in the open field line tube breaks into isolated narrow streams. I propose a model which attributes formation of streams to the process of the electric current adjustment in the magnetosphere. A mismatch between the magnetospheric current distribution and the current injected by the polar cap accelerator gives rise to reverse plasma flows in the magnetosphere. The reverse flow shields the electric field in the polar gap and thus shuts up the plasma production process. I assume that a circulating system of streams is formed such that the upward streams are produced in narrow gaps separated by downward streams. The electric drift is small in this model because the potential drop in narrow gaps is small. The gaps have to drift because by the time a downward stream reaches the star surface and shields the electric field, the corresponding gap has to shift. The transverse size of the streams is determined by the condition that the potential drop in the gaps is sufficient for the pair production. This yields the radius of the stream roughly 10% of the polar cap radius, which makes it possible to fit in the observed morphological features such as the "carousel" with 10-20 subbeams and the system of the core - two nested cone beams.Comment: 8 pages, 1 figur

Fermions on an Interval: Quark and Lepton Masses without a Higgs

We consider fermions on an extra dimensional interval. We find the boundary conditions at the ends of the interval that are consistent with the variational principle, and explain which ones arise in various physical circumstances. We apply these results to higgsless models of electroweak symmetry breaking, where electroweak symmetry is not broken by a scalar vacuum expectation value, but rather by the boundary conditions of the gauge fields. We show that it is possible to find a set of boundary conditions for bulk fermions that would give a realistic fermion mass spectrum without the presence of a Higgs scalar, and present some sample fermion mass spectra for the standard model quarks and leptons as well as their resonances.Comment: LaTeX, 36 pages, 5 figure

Quality of life of HIV+ patients undergoing pharmacotherapeutic follow-up

The influence of pharmacotherapeutic follow-up (PTF) on quality of life was evaluated in 45 HIV+ patients, who were undergoing initial antiretroviral therapy at a specialized care center in northeast Brazil. PTF lasted nine months and quality of life was analyzed at the 1st and 9th meetings using a questionnaire validated for Brazil. The study identified 643 problems related to antiretrovirals and there were 590 pharmaceutical interventions during the PTF. The comparative analysis between the results of the 1st and the 9th meeting was statistically significant for all domains of the questionnaire. For asymptomatic patients, only one domain was statistically significant. For symptomatic patients, six domains were significant. Patients with one year of HIV/AIDS diagnosis had statistically significant differences in five domains. The results suggest that the PTF contributed to improving quality of life, particularly for symptomatic patients and those diagnosed for at least one year - important target groups for Pharmaceutical Treatment.A influência do seguimento farmacoterapêutico (SFT) sobre a qualidade de vida foi avaliada em 45 pacientes HIV+ assistidos em serviço de atendimento especializado do nordeste brasileiro. O SFT teve duração de 9 meses e a qualidade de vida foi analisada no 1º e 9º encontros através de questionário validado no País. Identificaram-se 643 problemas relacionados aos antirretrovirais e realizaram-se 590 intervenções farmacêuticas durante o SFT. A análise comparativa entre os resultados de qualidade de vida do 1º e 9º encontro foi estatisticamente significativa em todos os domínios do questionário. Quando analisados somente os pacientes assintomáticos, apenas um domínio apresentou significância estatística. Entre os sintomáticos, seis domínios foram significativos. Pacientes com até um ano de diagnóstico de HIV/AIDS apresentaram validade estatística em cinco domínios. Os resultados sugerem que o SFT contribuiu para a melhoria da qualidade de vida dos pacientes, sobretudo dos sintomáticos e/ou com até um ano de diagnóstico, representando grupos-alvo para a prática da Atenção Farmacêutica

Meta-analysis of 49 549 individuals imputed with the 1000 Genomes Project reveals an exonic damaging variant in ANGPTL4 determining fasting TG levels

Background So far, more than 170 loci have been associated with circulating lipid levels through genomewide association studies (GWAS). These associations are largely driven by common variants, their function is often not known, and many are likely to be markers for the causal variants. In this study we aimed to identify more new rare and low-frequency functional variants associated with circulating lipid levels. Methods We used the 1000 Genomes Project as a reference panel for the imputations of GWAS data from ~60 000 individuals in the discovery stage and ~90 000 samples in the replication stage. Results Our study resu