Patch Dynamics
Mostrando 13-24 de 37 artigos, teses e dissertações.
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13. Bird movement patterns in a fragmented landscape and their effects to functional connectivity: an hierarchical approach / Padrões de movimentação de uma espécie de ave em paisagens fragmentadas e seus efeitos para a conectividade funcional: uma abordagem hierárquica
Habitat fragmentation is one of the major human impacts on terrestrial ecosystems. This process highly affects the species movement pattern, implying in considerable alterations on the connectivity between the remaining habitat patches. Consequently, it interferes in the spatial distribution and in the population dynamics of species. In this dissertation, so
Publicado em: 2009
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14. Estudo do Segmento Consenso Adjacente ao Domínio TM2 e parte do Domínio TM2 do Receptor P2X7: Dinâmica Molecular e Atividade de Canal Iônico. / Study of the segment adjacent consensus to domain TM2 and part of domain TM2 of receiver P2X7: molecular dynamics and activity of ionic canal.
The purinergic receptor P2X7 (P2X7R) is a membrane protein which forms channels in the presence of extracellular ATP. Once opened, the channels allow the transport of cations through the cellular membrane, being expressed preferentially in immune cells. Among all purinergic receptors, P2X7R has distinct characteristics from other P2X (P2XR) members. For exam
Publicado em: 2007
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15. Dinâmica populacional de afídeos (Hemiptera: Aphididae) em árvores cítricas no município de Nova Granada - SP / Population dynamics of aphids (Hemiptera: Aphididae) on citrus trees in Nova Granada County, São Paulo State, Brazil
Because aphids are possibly involved in the spread of viruses associated with a new and destructive disease, citrus sudden death (CSD), it is important to know their population dynamics in order to understand disease epidemiology. The goal of this research was to determine the main aphid species that colonize citrus groves [Citrus sinensis (L.) Osbeck] in CS
Publicado em: 2005
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16. A importância das palmeiras arborescentes de grande porte na dinâmica das florestas amazônicas sazonalmente secas.
We investigated and compared the determinants of palm diversity at different spatial scales: along a moisture gradient in a seasonally dry Amazonian forest and using a climatic model comprising the entire Brazilian territory. Climatic hazards seem to strongly determine the distribution of palms, with the relative importance of moisture being highly consisten
Publicado em: 2005
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17. "Artrópodos e suas relações de herbivoria como bioindicadores nos primeiros estágios de uma recomposição de floresta estacional semidecidual em Ribeirão Preto, SP". / Arthropods and its herbivory relationships as bioindicators in the first stages after restoration of a semideciduous estational forest area
In 1998 a recomposition project named "Floresta da USP" was started at the USP campus in Ribeirão Preto, SP, aiming at recovering a 75 ha area with the regional native vegetation, the seasonal semideciduous forest. This study evaluated the main changes that ocurried in this new habitat during the first years after planting, considering the arthropod communi
Publicado em: 2003
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18. Análise da vegetação arbórea e conservação na Reserva Florestal da Cidade Universitária "Armando de Salles Oliveira", São Paulo, SP / Analysis of arboreal vegetation and conservation at the Forest Reserve of the Cidade Universitária "Armando de Salles Oliveira", São Paulo, SP, Brazil
This work analyses the structure and dynamics, at several spatial and temporal scales, of the arboreal community in the Reserve of the Cidade Universitária "Armando de Salles Oliveira" (CUASO) (23º33 S, 46º43 W), São Paulo, SP. Based on these data, management actions are suggested, aiming at the conservation of the arboreal community at the site. The
Publicado em: 2002
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19. Kinetics of cell detachment: peeling of discrete receptor clusters.
Clustering of cell surface adhesion receptors is an essential step in the development of focal contacts, specialized cell-substrate attachment sites where receptors are simultaneously linked to extracellular ligand and cytoskeletal proteins. Previously, we examined the effect of receptor clustering on attachment strength. Here, we employ the numerical method
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20. Biophysics and Structure of the Patch and the Gigaseal
Interpreting channel behavior in patches requires an understanding of patch structure and dynamics, especially in studies of mechanosensitive channels. High resolution optical studies show that patch formation occurs via blebbing that disrupts normal membrane structure and redistributes in situ components including ion channels. There is a 1–2 μm region
The Biophysical Society.
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21. Adhesion induced by mobile binders: Dynamics
We consider a vesicle bilayer loaded with molecules that can bind (upon contact) with a solid surface, following the classical model of Bell, Dembo, and Bongrand. We are interested in situations where the contact area varies with time: we assume that binders can then migrate via diffusion. The resulting dissipation and lag create a retarded force on the cont
The National Academy of Sciences.
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22. A neuronal network model of macaque primary visual cortex (V1): Orientation selectivity and dynamics in the input layer 4Cα
In this paper, we offer an explanation for how selectivity for orientation could be produced by a model with circuitry that is based on the anatomy of V1 cortex. It is a network model of layer 4Cα in macaque primary visual cortex (area V1). The model consists of a large number of integrate-and-fire conductance-based point neurons, both excitatory and i
The National Academy of Sciences.
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23. Fold prediction of helical proteins using torsion angle dynamics and predicted restraints
We describe a procedure for predicting the tertiary folds of α-helical proteins from their primary sequences. The central component of the procedure is a method for predicting interhelical contacts that is based on a helix-packing model. Instead of predicting the individual contacts, our method attempts to identify the entire patch of contacts that involve
The National Academy of Sciences.
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24. Regulation of Sodium Channel Activity by Capping of Actin Filaments
Ion transport in various tissues can be regulated by the cortical actin cytoskeleton. Specifically, involvement of actin dynamics in the regulation of nonvoltage-gated sodium channels has been shown. Herein, inside-out patch clamp experiments were performed to study the effect of the heterodimeric actin capping protein CapZ on sodium channel regulation in le
The American Society for Cell Biology.