Entomofauna associada a reflorestamentos experimentais no município de Pau d'Arco, Pará.

Este estudo objetivou verificar a ocorrência de insetos em reflorestamentos experimentais com paricá, Schizolobium parahyba var. amazonicum (Fabaceae); acácia, Racosperma mangium (Fabaceae) e teca, Tectona grandis (Lamiaceae), na região de Pau d?Arco, PA, associando os efeitos sazonais e ontogenéticos nos plantios. O estudo foi conduzido entre os meses de maio de 2006 a junho de 2007 e constou de levantamentos mensais de insetos associados a plantios com idades de três a 16 meses. Houve associação positiva entre a ocorrência de insetos e suas respectivas injúrias com a sazonalidade e o desenvolvimento das plantas. Ao menos um pico populacional de insetos desfolhadores, sugadores e/ou polinizadores foi observado nas três espécies florestais. A análise de agrupamento confirmou a associação entre ocorrência de insetos, período chuvoso e idade da planta, destacando-se (a) lepidópteros em T. grandis, (b) coleópteros desfolhadores em S. parahyba; (c) acridídeos e lepidópteros em R. mangium; (d) cicadelídeos em S. parahyba e T. grandis; e (e) apídeos em R. mangium

Participation of bone marrow-derived cells in hippocampal vascularization after status epilepticus

Purpose: Diseases such as temporal lobe epilepsy, brain trauma and stroke can induce endothelial cell proliferation and angiogenesis in specific brain areas. During status epilepticus (SE), bone marrow-derived cells are able to infiltrate and proliferate, dramatically increasing at the site of injury. However, it is still unclear whether these cells directly participate in vascular changes induced by SE.Method: To investigate the possible role of bone marrow-derived cells in angiogenesis after seizures, we induced SE by pilocarpine injection in previously prepared chimeric mice. Mice were euthanized at 8 h, 7 d or 15 d after SE onset.Results: Our results indicated that SE modified hippocampal vascularization and induced angiogenesis. Further, bone marrow-derived GFP(+) cells penetrated through the parenchyma and participated in the formation of new vessels after SE. We detected bone marrow-derived cells closely associated with vessels in the hippocampus, increasing the density of blood vessels that had decreased immediately after pilocarpine-induced SE.Conclusion: We conclude that epileptic seizures directly affect vascularization in the hippocampus mediated by bone marrow-derived cells in a time-dependent manner. (C) 2014 British Epilepsy Association. Published by Elsevier B.V. All rights reserved.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Federal de São Paulo, Dept Physiol, BR-04023062 São Paulo, BrazilUniversidade Federal de São Paulo, Dept Physiol, BR-04023062 São Paulo, BrazilWeb of Scienc

Plásticos biodegradáveis à base de amido reforçados com fibras de coco.

bitstream/item/33764/1/CT10001.pd

Generalized Heisenberg Algebras and Fibonacci Series

We have constructed a Heisenberg-type algebra generated by the Hamiltonian, the step operators and an auxiliar operator. This algebra describes quantum systems having eigenvalues of the Hamiltonian depending on the eigenvalues of the two previous levels. This happens, for example, for systems having the energy spectrum given by Fibonacci sequence. Moreover, the algebraic structure depends on two functions f(x) and g(x). When these two functions are linear we classify, analysing the stability of the fixed points of the functions, the possible representations for this algebra.Comment: 24 pages, 2 figures, subfigure.st

Aspectos biomecânicos da locomoção de pessoas com doença de Parkinson: revisão narrativa

ResumoA presente revisão narrativa tem por objetivo analisar os aspectos biomecânicos da locomoção e os efeitos de intervenções nos padrões da marcha de pessoas com doença de Parkinson (DP). Fez‐se uma pesquisa bibliográfica no banco de dados dos sistemas SciELO e PubMed, com as seguintes palavras: human locomotion, biomechanics, pathologic gait e Parkinson's disease, em periódicos nacionais e internacionais. Concluímos que as principais alterações biomecânicas são nos parâmetros espaçotemporais, como menor comprimento de passada e estabilidade dinâmica, além da baixa ativação muscular nos músculos propulsores, bem como menor velocidade autosselecionada da marcha. Fazem‐se necessários protocolos de treinamento de caminhada que considerem esses parâmetros para auxiliar a reabilitação da marcha de pessoas com DP.AbstractThe purpose of this review was to analyze the biomechanical aspects of walking in individuals with Parkinson's disease (PD), as well as to examine the effects of intervention on gait pattern of PD. We carried out a bibliographic search on electronic databases SciELO and PubMed, using the following words: human locomotion, biomechanics, pathologic gait e Parkinson's disease, in national and international scientific journals. The main alterations on walking biomechanics are related to spatiotemporal parameters, lower stride length and dynamical stability, as well as reduced electromyographic activation on propulsion muscles and lower self‐selected speed. These outcomes seem to be important targets in walking training protocols for rehabilitation of gait in PD

Early colonization pattern of maize (Zea mays L. Poales, Poaceae) roots by Herbaspirillum seropedicae (Burkholderiales, Oxalobacteraceae)

The bacterium Herbaspirillum seropedicae is an endophytic diazotroph found in several plants, including economically important poaceous species. However, the mechanisms involved in the interaction between H. seropedicae and these plants are not completely characterized. We investigated the attachment of Herbaspirillum to maize roots and the invasion of the roots by this bacterium using H. seropedicae strain SMR1 transformed with the suicide plasmid pUTKandsRed, which carries a mini-Tn5 transposon containing the gene for the Discosoma red fluorescent protein (Dsred) constitutively expressed together with the kanamycin resistance gene. Integration of the mini-Tn5 into the bacterial chromosome yielded the mutant H. seropedicae strain RAM4 which was capable of expressing Dsred and could be observed on and inside fresh maize root samples. Confocal microscopy of maize roots inoculated with H. seropedicae three days after germination showed that H. seropedicae cell were attached to the root surface 30 min after inoculation, were visible in the internal tissues after twenty-four hours and in the endodermis, the central cylinder and xylem after three days

A catalogue of UK household datasets to monitor transitions to sustainable diets

There is growing international consensus that current patterns of food consumption are not sustainable and global change is needed. Understanding the mechanisms for a transition towards more sustainable diets requires systematic temporal monitoring at the individual or household level. Whilst many countries collect panel data on food expenditure and dietary intake, these datasets are often not designed to monitor progress towards dietary sustainability, therefore using them to understand how or why diets are becoming more or less sustainable can prove challenging. What is also lacking is a curated dataset catalogue or a library where all relevant data could be easily accessible to enable such evaluation. Our aim was to identify, classify and describe existing food expenditure and diet datasets available in the UK and to assess the extent to which they can be used to monitor transitions to sustainable diets. We found that despite the large number of datasets tracking UK individual or household food purchases and consumption over time, these datasets are not suited to understand how and why individuals are transitioning to sustainable diets. With the exception of proprietary datasets, most datasets only collect data annually, making it challenging to understand fine-scale behavioural change over shorter timeframes. There is an opportunity to design and implement an open-access UK sustainable diets data collection effort at the individual and household level. These efforts can be complemented with recent innovations in data science methods and digital technologies – such as dietary intake trackers – that, along with supporting individuals in their dietary behaviour change, may enable the collection of high-quality datasets