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Conflicting Discourses on Wildfire Risk and the Role of Local Media in the Amazonian and Temperate Forests

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International Journal of Disaster Risk Science 2019年第4期10卷 529-543页

作者： Nathalia Thais Cosmo da silva Urbano FraPaleo jose Ambrosio Ferreira Neto Departamento de Economia Rural Universidade Federal de VicosaCampus UniversitarioEdificio Edson Potsch MagalhaesVicosaMG 36570-900Brazil School of Social Sciences and Humanities University of ExtremaduraCampus of Caceres City10071 CaceresSpain

This article examines how risk is communicated by different actors,particularly local print newspapers and actors at the community level,in two different geographical contexts that are severely affected by wildfires—the Brazilian Amazon and Atlantic *** analyzed how wildfire risk is framed in local print media and local actor discourse to elucidate how wildfire risk is interpreted and aimed to identify the main priorities of these risk governance *** main findings reveal that the presentation of wildfire as a spectacle is a serious obstacle to the promotion of coherent risk governance and social learning,which involves recognizing wildfire risk as a social,political,economic,and environmental *** risk governance should communicate the multifaceted nature of risk and stimulate dialogue and negotiation among all actors to build consensus regarding land use and the creation of risk.

关键词： Discourse analysis Framing Galicia Local media Risk communication Rondonia Wildfire risk

Medicinal plants from the Brazilian Amazonian region and their antileishmanial activity:a review

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Journal of Integrative Medicine 2018年第4期16卷 211-222页

作者： Bruno jose Martins da silva Amanda Anastacia Pinto Hage Edilene Oliveira silva Ana Paula Drummond Rodrigues Laboratory of Parasitology and Laboratory of Structural Biology Institute of Biological SdencesFederal University of PardBelemPard 66075-110Brazil National Institute of Science and Technology in Structural Biology and Bioimaging Rio de JaneiroRio de Janeiro 21941-901Brazil Laboratory of Electron Microscopy Department of Health SurveillanceMinistry of HealthEvandro Chagas InstituteBelemPard 66087-082Brazil

Leishmaniasis, a neglected disease caused by Leishmania protozoans, primarily affects people in tropical and subtropical areas. Chemotherapy based on the use of pentavalent antimonials, amphotericin B, paromomycin, miltefosine and liposomal amphotericin B is currently the only effective treatment. However, adverse effects, long-term treatment and the emergence of parasite resistance have led to the search for alternative treatments. Natural products used in traditional medicine provide an unlimited source of molecules for the identification of new drugs, and the Amazon region has abundant biodiversity that includes several species of plants and animals, providing a rich source of new products and com- pounds. Although the literature describes numerous promising compounds and extracts for combating Leishmania protozoans, the results of such research have not been embraced by the pharmaceutical industry for the development of new drugs. Therefore, this review focused on the antileishmanial activity of extracts, isolated compounds and essential oils commonly used by the local population in the Brazilian Amazonian region to treat several illnesses and described in the literature as promising compounds for combating leishmaniasis.

关键词： Amazonian plants Leishmaniasis treatment Plant compounds Plant extracts Plant oils

In vitro antileishmanial effects of Physalis angulata root extract on Leishmania infantum

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Journal of Integrative Medicine 2018年第6期16卷 404-410页

作者： Bruno jose Martins da silva Sandro Wilson Gomes Pereira Ana Paula Drummond Rodrigues jose Luiz Martins Do Nascimento Edilene Oliveira silva Laboratory of Structural Biology Institute of Biological SciencesFederal University of PardBelemPard 66075-110Brazil National Institute of Science and Technology in Structural Biology and Bioimaging(INCT-INBEB) Rio de Janeiro 21941-901Brazil Laboratory of Electron Microscopy Department of Health SurveillanceMinistry of HealthEvandro Chagas InstituteBelemPard 66087-082Brazil Laboratory of Molecular and Cellular Neurochemistry Institute of Biological SciencesFederal University of PardBelemPard 66075-110Brazil National Institute of Science and Technology in Neuroimmunomodulation(INCT-NIM) Rio de Janeiro 21040-360Brazil

Objective： In the present study, we evaluated the effects of the aqueous extract of Physalis angulata root （AEPa） on Leishmania infanturn proliferation, morphology, and the driving mechanism in leishmanicidal activity and modulatory action on macrophages. Methods： I., infantum promastigotes were treated with 50 and 100 μg/mL AEPa for 72 h and then antipro- mastigote assay was performed by counts in a Newbauer chamber, morphological changes were analyzed by transmission electron microscopy and the mechanism of the leishmanicidal activity was detected. In addition, macrophages were infected with L. infantum and were used to evaluate anti-amastigote activity of AEPa and effects of AEPa on cytokine secretion after 72-hour treatment. Results： Treatment with AEPa reduced the numbers ofL infantum promastigotes （50% inhibitory concen- tration （ICso） = 65.9μg/mL; selectivity index （SI）= 22.1） and amastigotes （ICso = 37.9 μg/mL; SI = 38.5） compared with the untreated control. Amphotericin B reduced 100% of the promastigote numbers after 72 h of treatment （IC50 = 0.2μg/mL）. AEPa induced several morphological changes and increased the production of reactive oxygen species and apoptotic death in promastigotes after treating for 72 h. AEPa （100 μg/mL） promoted tumor necrosis factor-α secretion in macrophages infected with L. infantum after 72 h of treatment, but did not induce an increase in this cytokine in noninfected macrophages. In addition, AEPa showed no cytotoxic effect on J774-A1 cells （50% cytotoxic concentration 〉1000μg/mL）. Conclusion： AEPa presented antileishmanial activity against the promastigotes and amastigotes of I.. infantum without macrophage cytotoxicity; these results show that natural products such as P. angulata have leishmanicidal potential and in the future may be an alternative treatment for leishmaniasis.

关键词： Leishmanicidal activity Leishmania infantum Reactive oxygen species Apoptosis Physalis angulata

Novel therapeutic strategies targeting mitochondria as a gateway in neurodegeneration

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Neural Regeneration Research 2023年第5期18卷 991-995页

作者： Diogo Trigo jose Joao Vitoria Odete A.B.da Cruz e silva Neuroscience and Signalling Laboratory Institute of Biomedicine(iBiMED)Department of Medical SciencesUniversity of AveiroAveiroPortugal

In recent years, multiple disciplines have focused on mitochondrial biology and contributed to understanding its relevance towards adult-onset neurodegenerative disorders. These are complex dynamic organelles that have a variety of functions in ensuring cellular health and homeostasis. The plethora of mitochondrial functionalities confers them an intrinsic susceptibility to internal and external stressors(such as mutation accumulation or environmental toxins), particularly so in long-lived postmitotic cells such as neurons. Thus, it is reasonable to postulate an involvement of mitochondria in aging-associated neurological disorders, notably neurodegenerative pathologies including Alzheimer’s disease and Parkinson’s disease. On the other hand, biological effects resulting from neurodegeneration can in turn affect mitochondrial health and function, promoting a feedback loop further contributing to the progression of neuronal dysfunction and cellular death. This review examines state-of-the-art knowledge, focus on current research exploring mitochondrial health as a contributing factor to neuroregeneration, and the development of therapeutic approaches aimed at restoring mitochondrial homeostasis in a pathological setting.

关键词： Alzheimer’s disease axon energy homeostasis glymphatic system mitochondria mitostasis neurodegeneration neuroregeneration Parkinson’s disease therapeutical strategies

CFD predictions for hazardous area classification

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Chinese Journal of Chemical Engineering 2019年第1期27卷 21-31页

作者： Andrey Oliveira de Souza Aurélio Moreira Luiz Ant?nio Tavernard Pereira Neto Ant?nio Carlos Brandao de Araujo Heleno Bispo da silva Sidinei Kebler da silva jose Jailson Nicacio Alves Federal Institute of Education Science and Technology of Paraiba Petrobras-Petróleo Brasileiro S.A. Federal University of Campina Grande

This study aimed to describe a Computational Fluid Dynamics(CFD) procedure using the ANSYS CFX software 16.1 and Design of Experiments for the determination of volume and extension of explosive atmospheres due to fugitive emissions of flammable *** multidimensional statistical sampling technique Latin Hypercube was used, which defined 100 simulations of random methane gas leak *** CFD model proved to be robust in predicting the extension and volume of the explosive atmosphere for orifice diameters from 0.1 to2.5 mm, pressure from 0.1 MPa to 12 MPa and temperatures from 0 ℃ to 400 ℃.It was found that the calculation domain must be parameterized 8 m in length for each millimeter of the diameter of the source of release to ensure the *** order not to lose precision for very small diameters, the mesh was parameterized with 50 elements along the orifice *** was proved that gravity does not influence the extension and volume of the explosive atmosphere at sonic *** deviation from the ideal gas behavior in the reservoir,achieved by applying the Soave–Redlich–Kwong equation of state, also has not significantly influenced the extension and volume of the explosive *** results showed that the size of the explosive atmosphere varies directly with the diameter of the source emission and reservoir pressure, and inversely with the temperature of the *** diameter of the source is the parameter that has the major effect on the extension of the explosive atmosphere, followed by the pressure and lastly the temperature of the reservoir.

关键词： Computational Fluid Dynamics Computer simulation Safety Fugitive emissions Classified area Flammable gas cloud

On the fractional doubly parabolic Keller-Segel system modelling chemotaxis

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Science China Mathematics 2022年第9期65卷 1827-1874页

作者： Mario Bezerra claudio Cuevas Clessius silva Herme Soto Department of Mathematics Federal University of PernambucoRecife 50540-740Brazil Department of Mathematics Rural Federal University of PernambucoRecife 52171-900Brazil Department of Mathematics and Statistics University of La FronteraTemucoCasilla 54-DChile

This work is concerned with the time-fractional doubly parabolic Keller-Segel system in R^(N)(N≥1),and we derive some refined results on the large time behavior of solutions which are presupposed to enjoy some uniform boundedness ***,the well-posedness and the asymptotic stability of solutions in Marcinkiewicz spaces are *** results are achieved by means of an appropriate estimation of the system nonlinearity in the course of an analysis based on Duhamel-type representation formulae and the Kato-Fujita framework which consists in constructing a fixed-point argument by using a suitable time-dependent space.

关键词： chemotaxis aggregation Keller-Segel model decay properties asymptotic profiles global solutions

Prognosis of forest production using machine learning techniques

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Information Processing in Agriculture 2023年第1期10卷 71-84页

作者： Jeferson Pereira Martins silva Mayra Luiza Marques da silva Adriano Ribeiro de Mendonca Gilson Fernandes da silva Antoˆnio Almeida de Barros Junior Evandro Ferreira da silva Marcelo Otone Aguiar Jeangelis silva Santos Nı´vea Maria Mafra Rodrigues Federal University of Espirito Santo UFESDepartment of Forestry and Wood ScienceAvenue Governor Lindemberg31629550-000 Jeroˆnimo MonteiroESBrasil b Departamento de Cieˆncias Agra´riasUniversidade Federal de Sa o Joa del-Rei Sete Lagoas CampusHighway MG 424-Km 47Sete LagoasMinas Gerais 35701-970Brazil Federal University of Para(UFPA) University Campus of AltamiraStreet Cel.Jose Porfırio2515Sa o Sebastiao68372-040 AltamiraPABrazil

Forest production and growth are obtained from statistical models that allow the generation of information at the tree or forest stand *** the use of regression models is common in forest measurement,there is a constant search for estimation procedures that provide greater ***,machine learning techniques have been used with satisfactory performance in measuring ***,methods such as Adaptive NeuroFuzzy Inference System(ANFIS)and Random Forest are relatively poorly studied for predicting the volume of wood in eucalyptus plantations in ***,it is essential to check whether these techniques can provide gains in terms of ***,this study aimed to evaluate the use of Random Forest and ANFIS techniques in the prognosis of forest *** data used come from continuous forest inventories carried out in stands of eucalyptus *** data were divided into 70%for training and 30%for *** algorithms used to generate rules in ANFIS were Subtractive Clustering and ***,training was done with the hybrid algorithm(descending gradient and least squares)with the number of seasons ranging from 1 to *** RFs were trained,varying the number of trees from 50 to 850 and the number of observations by five leaves to *** neural networks and decision trees were also trained to compare the feasibility of the *** evaluation of the estimates generated by the techniques for training and validation was calculated based on the following statistics:correlation coefficient(r),relative Bias(RB),and the relative root mean square error(RRMSE)in *** general,the techniques studied in this work showed excellent performance for the training and validation data set with RRMSE values*** RF presented inferior statistics about the ANFIS for the prognosis of forest *** Subtractive Clustering(SC)and Fuzzy-C-Means(FCM)algorithms provide accurate baseline

关键词： Artificial Intelligence Ensemble Learning Forest Measurement Forest inventory Artificial Neural Networks Regression

Enterprise Content Management with Information Architecture： Guidelines to Structure the Information Assets

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Computer Technology and Application 2013年第9期4卷 490-493页

作者： claudio jose silva Ribeiro DPTD - Department of Technical Process and Documentation UNIRIO - Federal University of Rio de Janeiro State Rio de Janeiro22290-240 Brazil

CM （contelat management） is a strategic discipline that should support the information assets of a company. Although there are some technological instruments structuring this work, the methods that have been used must have improvement to a better use. In this sense, IA （information architecture）, as a process that helps users to manage and find information, can collaborate with the organization of this assets allowing the best identification and categorization of information, as well as providing improvements in the website navigation in Intranets and Internet. This article introduces part of a research that deals with the use of IA for developing and structuring the project of dataprev about the content management for Brazilian social security system.

关键词： CM IA dataprev Brazilian social security Brazil.

Integrating species and successional classes for wood production in a mixed forest restoration system in a neotropical region

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Journal of Forestry Research 2021年第6期32卷 2313-2321页

作者： Ananias Francisco Dias Junior Ana Lucia Martins Sodero Pincelli Ana Paula Camara da silva Alison Moreira da silva Natalia Dias de Souza Mario Tommasiello Filho jose Otavio Brito Wood and Forestry Science Department Federal University of EspIrito Santo(UFES)Av.Governador Lindemberg316JerOnimo Monteiro CityES 29550-000Brazil São Paulo State School of Technology(FATEC/SP) Av.DiacOno Jair de Oliveira651PiracicabaSP 13414-141Brazil Forest Products Department Federal Rural University of Rio de Janeiro(UFRRJ)BR 465km 07SeropEdicaRJ 29890-000Brazil University of SAo Paulo “Luiz de Queiroz”College of Agriculture(USP/ESALQ)Av.PAdua Dias11PiracicabaSP 13418-900Brazil

As forests in neotropical regions,particularly in developing countries,are devastated,interventions to restore biodiversity and its ecological functions are *** producers have thus been encouraged to grow trees for wood production as an economic *** objective of this study was to quantify the increment of wood density of four forest species from different successional classes of a mixed system of restoration in a neotropical forest in *** discs were sampled at breast height and analyzed radially by X-ray densitometry to obtain apparent density and basic *** trees each of a species from the pioneer,early and late secondary successional stages and of the dominant species in the climax *** radial profiles indicated increasing density from the pith to bark of trunks,except for some variations due to wood defects and *** density was 0.576 g cm^(-3),0.655 g cm^(-3),0.706 g cm^(-3)and 0.775 g cm^(-3),respectively,for Peltophorum dubium,Schinus terebinthifolius,Cariniana estrellensis and Hymenaea *** profiles indicated higher amplitudes in the apparent densities for slow-growing species.X-ray densitometry generated parameters such as minimum,average and maximum densities,and radial density *** parameters are important for understanding the ecological functional role of successional classes of the Atlantic Forest from the Neotropical region.

关键词： X-ray densitometry Timber species of neotropical forest Successional classes of forest species Maintenance of forest restoration