624 research outputs found

    Publication Trends Studies Involving Disabled Persons with Dental Care Needs: A 20-Year Bibliometric Analysis

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    Objective: To evaluate scientific production on disabled persons with dental care needs over a 20-year period. Material and Methods: The search was conducted in the PubMed database using the MeSH terms “Disabled Persons” AND “Dentistry”. Three researchers selected articles based on readings of the title, abstract and full text. The articles were categorized according to periodical, country, study design, subject and classification of comorbidities and associated disorders. Three hundred ninety-seven articles published in 140 periodicals were included. Results: The periodicals Special Care in Dentistry (54), Dental Clinics of North America (14) and British Dental Journal (14) accounted for 21% of the publications. The studies were conducted in 50 countries, with the United States accounting for 33%. More than half (52%) of the studies had a cross-sectional design. The main subject addressed was oral diagnosis and most of the comorbidities were generalized disabilities. Conclusion: Although a large number of the periodicals have contributed to knowledge building on disabled persons with dental care needs, the number of articles is small compared to other fields of dentistry. Moreover, important gaps in knowledge persist and projects with better methodological designs are needed to offer a more substantial contribution to clinical practice

    Structural laterality is associated with cognitive and mood outcomes: An assessment of 105 healthy aged volunteers

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    The human brain presents multiple asymmetries that dynamically change throughout life. These phenomena have been associated with cognitive impairments and psychiatric disorders although possible associations with specific patterns of cognitive aging are yet to be determined. We have therefore mapped and quantified morphological asymmetries in a heterogeneous and aged population (65.2 +/- 8.0 years old, 52 male and 53 female) to explore potential associations between the asymmetries in specific brain regions and cognitive performance. The sample was characterized in a battery of neuropsychological tests and in terms of brain structural asymmetries using a ROI-based approach. A substantial number of brain areas presented some degree of asymmetry. Such biases survived a stringent statistical correction and were largely confirmed in a voxel-based analysis. In specific brain areas, like the thalamus and insula, asymmetry was correlated with cognition and mood descriptors as the Stroop words/colors test or depressive mood scale, respectively. Curiously in the latter, the association was independent of its left/right direction. Altogether, results reveal that asymmetry is widespread in the aged brain and that area-specific biases (degree and direction) associate with the functional profile of the individual.European Commission (FP7): “SwitchBox” [contract HEALTH-F2-2010-259772] and Portuguese North Regional Operational Program (ON.2 – O Novo Norte) under the National Strategic Reference Framework (QREN), through the European Regional Development Fund (FEDER) – PM and NCS; Fundação para a CiĂȘncia e a Tecnologia (FCT) [grant numbers SFRH/BD/52291/2013 to ME via Inter-University Doctoral Programme in Ageing and Chronic Disease (PhDOC), SFRH/BPD/80118/2011 to HA and SFRH/BD/90078/2012 to TCC]; and FCT/MEC and ON.2 – ONOVONORTE – North Portugal Regional Operational Programme 2007/2013, of the National Strategic Reference Framework (NSRF) 2007/2013, through FEDER [project FCTANR/NEU-OSD/0258/2012 to RM]info:eu-repo/semantics/publishedVersio

    Modelling the distribution of a commercial NE-Atlantic sea cucumber, Holothuria mammata : demographic and abundance spatio-temporal patterns

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    Funding: This study was financed by the Operational Programme Mar2020, MAR-02.01.01-FEAMP-0052, “Newcumber – Avanços para o cultivo sustentĂĄvel de pepinos do mar”. It received further financial support from Fundação para a CiĂȘncia e Tecnologia (projects UIDB/04292/2020, UIDB/00006/2020, CoastNet – PINFRA/22128/2016, AB with the Scientific Stimulus Programme – CEECIND/00095/2017 and FA with the individual research grant 2020.09563.BD). This publication was financed by Portuguese national funds through FCT – Fundação IP under project reference UIDB/04292/2020, and by the European Union’s Horizon 2020 Research and Innovation Program under grant agreement N810139: Project Portugal Twinning for Innovation and Excellence in Marine Science and Earth Observation – PORTWIMS.There is an increasing demand for sea cucumbers, for human consumption, mainly from Asian markets and, as a consequence, NE-Atlantic species are now new targets for exploitation and exportation. Holothuria mammata is one of the most valuable species in Europe. However, the lack of historical economic interest in this species in most European countries has also led to a lack of studies concerning biological and ecological aspects on wild populations and this is a major issue for stock management. This study aims to determine the temporal and spatial patterns of distribution of H. mammata, considering its abundance and demographic structure in a NE-Atlantic area, SW Portugal, as a function of environmental conditions. For that, a population from a marine protected area was followed for 1 year at 1.5-month intervals. Throughout the coastal area, six sites were selected and at each sampling campaign three random transects per site and substrate (rock and sand) in which all H. mammata individuals were counted and measured. For each site and survey several environmental parameters of interest, from the water column, the sediment and substrate cover, were also measured. Generalized Linear Models were used to model the spatial and temporal distribution of the species according to environmental conditions, to determine the species’ habitat preferences. The distribution models indicate that abiotic and biotic parameters of the water column are not the main drivers shaping the distribution of H. mammata. The species has a patchy distribution, and its habitat preferences depend on environmental stability, the presence of shelter and habitat complexity, which is more important for smaller, more vulnerable, individuals, while bigger size classes tend to venture more into less stable environments in an opportunistic fashion. The knowledge of these population traits is determinant to develop stock management measures, which are now urgent to prevent the depletion of commercial sea cucumber populations in the NE-Atlantic. Sustainable fisheries policies should be developed and start by considering to delimit fishing areas and periods, considering the species spatial and temporal distribution patterns.Publisher PDFPeer reviewe

    Asymmetrical subcortical plasticity entails cognitive progression in older individuals

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    Structural brain asymmetries have been associated with cognition. However, it is not known to what extent neuropsychological parameters and structural laterality covary with aging. Seventy-five subjects drawn from a larger normal aging cohort were evaluated in terms of MRI and neuropsychological parameters at two moments (M1 and M2), 18 months apart. In this time frame, asymmetry as measured by structural laterality index (ΔLI) was stable regarding both direction and magnitude in all areas. However, a significantly higher dispersion for this variation was observed in subcortical over cortical areas. Subjects with extreme increase in rightward lateralization of the caudate revealed increased M1 to M2 Stroop interference scores, but also a worsening of general cognition (MMSE). In contrast, subjects showing extreme increase in leftward lateralization of the thalamus presented higher increase in Stroop interference scores. In conclusion, while a decline in cognitive function was observed in the entire sample, regional brain asymmetries were relatively stable. Neuropsychological trajectories were associated with laterality changes in subcortical regions.This work was supported by the project NORTE‐01‐0145‐FEDER‐000013 through the Northern Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (FEDER), and funded by the European Commission (FP7) “SwitchBox ‐ Maintaining health in old age through homeostasis” (Contract HEALTH‐F2‐2010‐259772), and co‐financed by the Portuguese North Regional Operational Program (ON.2 – O Novo Norte), under the National Strategic Reference Framework (QREN), through FEDER, and by the Fundação Calouste Gulbenkian (Portugal) (Contract grant number: P‐139977; project “TEMPO ‐ Better mental health during ageing based on temporal prediction of individual brain ageing trajectories”) and by “PANINI ‐ Physical Activity and Nutrition INfluences In ageing” (European Commission (Horizon 2020), Contract GA 675003). Individual authors were supported under: "SwitchBox" to PM and NCS; Fundação para a CiĂȘncia e a Tecnologia (FCT) grants SFRH/BD/52291/2013 to ME and PD/BD/106050/2015 to CPN via Inter‐University Doctoral Programme in Ageing and Chronic Disease (PhDOC), PDE/BDE/113601/2015 to PSM and PDE/BDE/113604/2015 to RM via PhD Program in Health Sciences (Applied) (Phd‐iHES), SFRH/BD/90078/2012 to TCC, SFRH/BD/101398/2014 to LA and SFRH/BPD/80118/2011 do HLAinfo:eu-repo/semantics/publishedVersio

    Population structure in Quercus suber L. revealed by nuclear microsatellite markers

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    Quercus suber L. is a sclerophyllous tree species native to the western Mediterranean, a region that is considered highly vulnerable to increased temperatures and severe dry conditions due to environmental changes. Understanding the population structure and demographics of Q. suber is essential in order to anticipate whether populations at greater risk and the species as a whole have the genetic background and reproductive dynamics to enable rapid adaptation. The genetic diversity of Q. suber has been subject to different studies using both chloroplast and nuclear data, but population structure patterns remain unclear. Here, we perform genetic analyses on Q. suber using 13 nuclear microsatellite markers, and analysed 17 distinct locations across the entire range of the species. Structure analyses revealed that Q. suber may contain three major genetic clusters that likely result from isolation in refugia combined with posterior admixture and putative introgression from other Quercus species. Our results show a more complex structure scenario than previously inferred for Q. suber using nuclear markers and suggest that different southern populations contain high levels of genetic variation that may contribute to the resilience of Q. suber in a context of environmental change and adaptive pressureinfo:eu-repo/semantics/publishedVersio

    Haplotype diversity patterns in Quercus suber (Fagaceae) inferred from cpDNA sequence data

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    Chloroplast genome diversity in cork oak (Quercus suber) is characterised by the occurrence of haplotypes that are akin to those found in other Mediterranean oak species, particularly in Q. ilex and Q. rotundifolia, suggesting the possible presence of an introgressed chloroplast lineage. To further investigate this pattern, we reconstructed chloroplast haplotypes by sequencing four chloroplast markers (cpDNA), sampled across 181 individuals and 10 taxa. Our analyses resulted in the identification of two diversified chloroplast haplogroups in Q. suber, corresponding to a geographically widespread lineage and an Afro-Iberian lineage. Time-calibrated phylogenetic analyses of cpDNA point to a Miocene origin of the two haplogroups in Q. suber, suggesting that the Afro-Iberian lineage was present in cork oak before the onset of glaciation periods. The persistence of the two haplogroups in the western part of the species distribution range may be a consequence of either ancient introgression events or chloroplast lineage sorting, combined with different fixation in refugia through glaciation periods. Our results provide a comprehensive insight on the origins of chloroplast diversity in these ecologically and economically important Mediterranean oaks.info:eu-repo/semantics/publishedVersio

    Status da diversidade de peixes durante a instalação de reservatĂłrios hidrelĂ©tricos no mĂ©dio Rio Verde (Mato Grosso do Sul – Brasil) / Status of fish diversity during the installation of hydroelectric reservoirs in the middle Verde River (Mato Grosso do Sul – Brazil)

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    O rio Verde Ă© importante rota migratĂłria e sĂ­tio reprodutivo de espĂ©cies de peixes da bacia do Alto rio ParanĂĄ. Apresentamos a ictiofauna remanescente na regiĂŁo do mĂ©dio rio Verde apĂłs a instalação da UHE SĂŁo Domingos, durante a instalação e inĂ­cio de operaçÔes das PCHs Verde 4 e Verde 4A (2017 a 2019). A biocenose registrada apresentou diversidade abaixo do esperado, com aderĂȘncia altamente significativa aos modelos de sĂ©rie geomĂ©trica de distribuição de abundĂąncia das espĂ©cies. Mesmo com os impactos da instalação dos barramentos no mĂ©dio Verde, hĂĄ uma significativa ictiofauna local a se conservar e manejar, ainda com presença espĂ©cies reofĂ­licas. Consideramos a influĂȘncia de impactos originados fora e dentro da ĂĄrea dos empreendimentos, incluindo assoreamento, limitaçÔes de migração ou dispersĂŁo e presença de espĂ©cies introduzidas a partir de montante e jusante na bacia. Apresentamos argumentação preliminar para o manejo integrado da comunidade Ă­ctica da bacia

    Haplotype diversity patterns in Quercus suber (Fagaceae) inferred from cpDNA sequence data

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    Chloroplast genome diversity in cork oak (Quercus suber) is characterised by the occurrence of haplotypes that are akin to those found in other Mediterranean oak species, particularly in Q. ilex and Q. rotundifolia, suggesting the possible presence of an introgressed chloroplast lineage. To further investigate this pattern, we reconstructed chloroplast haplotypes by sequencing four chloroplast markers (cpDNA), sampled across 181 individuals and 10 taxa. Our analyses resulted in the identification of two diversified chloroplast haplogroups in Q. suber, corresponding to a geographically widespread lineage and an Afro-Iberian lineage. Time-calibrated phylogenetic analyses of cpDNA point to a Miocene origin of the two haplogroups in Q. suber, suggesting that the Afro-Iberian lineage was present in cork oak before the onset of glaciation periods. The persistence of the two haplogroups in the western part of the species distribution range may be a consequence of either ancient introgression events or chloroplast lineage sorting, combined with different fixation in refugia through glaciation periods. Our results provide a comprehensive insight on the origins of chloroplast diversity in these ecologically and economically important Mediterranean oaks.info:eu-repo/semantics/publishedVersio

    Identification of lignocellulose-degrading enzymes using metagenomic approaches

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    Composting units which handle lignocellulosic residues are suitable sources of novel and promising lignocellulose-degrading enzymes such as cellulases, xylanases and amylases. These enzymes have practical application in many industries where lignocellulose is converted into several added-value bioproducts. However, the effective conversion of lignocellulose by a sustainable process is currently incomplete. Therefore, there is a need to find novel and robust catalysts to overcome this fact. Function- and sequence-based metagenomic approaches were used to identify novel lignocellulose-degrading enzymes with interesting industrial applications.info:eu-repo/semantics/publishedVersio
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