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Spatiotemporal Variability of Methane over the Amazon from Satellite Observations

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Advances in Atmospheric Sciences 2016年第7期33卷 852-864页

作者： Igor Oliveira RIBEIRO] Rodrigo Augusto Ferreira de SOUZA rita Valeria ANDREOLI Mary Toshie KAYANO Patrfcia dos Santos COSTA Post-Graduate Program in Climate and Environment CLIAMBINPA/UEAAv.Andre Araujo2936Campus 11Aleixo69060-001ManausAMBrasil Amazonas State University Superior School of TechnologyAv.Darcy Vargas1200Parque 10 de Novembro69065-020ManausAMBrasil National Institute for Space Research Center For Weather Forecasting and Climate ResearchAv.dos Astronautas175812227-010Sao Josd dos CamposSPBrasil

The spatiotemporal variability of the greenhouse gas methane （CH4） in the atmosphere over the Amazon is studied using data from the space-borne measurements of the Atmospheric Infrared Sounder on board NASA＇s AQUA satellite for the period 2003-12. The results show a pronounced variability of this gas over the Amazon Basin lowlands region, where wetland areas occur. CH4 has a well-defined seasonal behavior, with a progressive increase of its concentration during the dry season, followed by a decrease during the wet season. Concerning this variability, the present study indicates the important role of ENSO in modulating the variability of CH4 emissions over the northern Amazon, where this association seems to be mostly linked to changes in flooded areas in response to ENSO-related precipitation changes. In this region, a CH4 decrease （increase） is due to the E1 Nifio-related （La Nifia-related） dryness （wetness）. On the other hand, an increase （decrease） in the biomass burning over the southeastern Amazon during very dry （wet） years explains the increase （decrease） in CH4 emissions in this region. The present analysis identifies the two main areas of the Amazon, its northern and southeastern sectors, with remarkable interannual variations of CH4. This result might be useful for future monitoring of the variations in the concentration of CH4, the second-most important greenhouse gas, in this area.

关键词： climate variability methane satellite data Amazon region

Environmental Exposure Associated with Oxidative Stress Biomarkers in Children and Adolescents Residents in Brazilian Western Amazon

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Journal of Environmental Protection 2018年第4期9卷 347-367页

作者： Beatriz Fatima Alves de Oliveira Leandro vargas Barreto de Carvalho Dennys de Souza Mourao rita de Cassia Oliveira da Costa Mattos Hermano Albuquerque de Castro Paulo Artaxo Washington Leite Junger Sandra Hacon National School of Public Health Oswaldo Cruz FoundationRio de JaneiroBrazil Center for Studies of Worker’s Health and Human Ecology Oswaldo Cruz FoundationRio de JaneiroBrazil Institute of Physics University of Sao PauloSao PauloBrazil Departament of Epidemiology/Social Medicine Institute State University of Rio de JaneiroRio de JaneiroBrazil

Oxidative stress is a biological process that occurs in response to an imbalance between prooxidant and antioxidant substances and has been described in the pathophysiology of more than 200 clinical disorders. In this study, we evaluate the relationship between genetic, demographic, social, environmental, and health factors and redox imbalance biomarkers in a group of children and adolescents environmentally exposed to atmospheric pollutants and mercury in the Brazilian Western Amazon. This is a cross-sectional study of the relationship between demographic, genetic, and socioenvironmental factors and serum concentrations of redox imbalance biomarkers (thiol groups, malondialdehyde, and glutathione S-transferase [GST]) in children and adolescents living in the municipality of Porto Velho, Rond?nia. The investigated factors were hierarchically organized into groups of variables and their relationship with redox imbalance biomarkers was estimated by a multiple linear regression model. Children and adolescents with asthma, with C-reactive protein values, with the polymorphic variant GSTP1, and exposed to indoor air pollution presented lower thiol serum concentrations when compared to those categorized in their respective reference groups. GST activity and malondialdehyde serum concentrations were positively related to weekly fish consumption and exposure to PM2.5. This study showed that enzymatic GST activity and malondialdehyde serum concentrations are positively associated with environmental factors, especially air pollution (β = 8.64 U/L for GST and β = 0.244 μmol/L for MDA in high exposure group;p-value < 0.01);while serum thiol concentrations presented an inversely proportional relationship with markers of general health status, such asthma (median: 0.45 mmol/L vs. 0.48 mmol/L;p-value < 0.05), acute inflammation (β = -0.25 mmol/L;p-value < 0.01), and positively with genetic factor (β = 0.12 mmol/L for Val/Val;p-value < 0.05).

关键词： Redox Imbalance Glutathione S-Transferase Thiol Groups Malondialdehyde Brazilian Amazon

Differential Effect on Two Immobility Responses by Chronic Administration of 1,3-di-o-Tolyl-Guanidine (Sigma Receptor Agonist) in Rats with Neonatal Ventral Hippocampal Lesion

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Pharmacology & Pharmacy 2014年第7期5卷 681-690页

作者： Blanca Estela Jaramillo Fidel De la Cruz Genaro vargas Oscar O. Morales Gonzalo Flores Sergio R. Zamudio Linda Garcés-Ramírez Departamento de Fisiología Escuela Nacional de Ciencias Biológicas Instituto Politécnico Nacional México D. F. México Instituto de Fisiología Benemérita Universidad Autónoma de Puebla Puebla México Programa Educativo de la Ingeniería en Biotecnología Universidad Politécnica de Pachuca Zempoala Hidalgo México

The effect of chronic administration of the sigma agonist: 1,3-di-o-tolyl-guanidine (DTG), in neonatal ventral hippocampal lesioned (nVHL) rats, on the immobility by clamping and dorsal immobility, were investigated. The nVHL increases the duration of immobility by clamping, but does not affect the duration of the dorsal immobility. We found that DTG augments the duration of the dorsal immobility in the unlesioned rats, but does not modify the duration of immobility induced by clamping the neck. DTG also counteracts the increase in the duration of the immobility by clamping produced by nVHL. However, the increase in the duration of the dorsal immobility produced by DTG is counteracted by nVHL. These results are discussed with respect to the differential effect on the two immobility responses tested, suggesting that they are different forms of immobility mediated by different mechanisms although they behaviorally share common characteristics.

关键词： Immobility Response Sigma Receptor DTG Schizophrenia Neonatal Ventral Hippocampal Lesion

Vapor Phase Decarbonylation of Furfural to Furan over Nickel Supported on SBA-15 Silica Catalysts

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Modern Research in Catalysis 2016年第3期5卷 85-94页

作者： Diana vargas-Hernández Juan Miguel Rubio-Caballero Ramon Moreno-Tost Josefa María Mérida-Robles José Santamaría-González Antonio Jiménez-López María Ana Pérez-Cruz Rosario Hernández-Huesca Pedro Maireles-Torres Catedrática CONACYT—Universidad de Sonora Hermosillo México Departamento de Química Inorgánica Cristalografía y Minerología (Unidad Asociada al ICP-CSIC) Facultad de Ciencias Universidad de Málaga Málaga Spain Facultad de Ciencias Químicas Benemérita Universidad Autónoma de Puebla Puebla México

Vapor-phase transformations of furfural over SBA-15 silica supported Ni catalysts under H2 in a continuous-flow reactor at atmospheric pressure and 170°C and 230°C were investigated. Two different samples having Ni loadings of 5 and 20 wt% (denoted here by SBA-5Ni and SBA-20Ni, respectively) were prepared by impregnation and characterized by atomic absorption spectroscopy, N2 sorption analysis, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. Furan and furfuryl alcohol were two primary products resulting, respectively, from decarbonylation and hydrogenation of furfural. Under the conditions of the study, both reactions exhibited structure sensitivity evidenced by changes in product selectivities with variable Ni loadings. Compared with SBA-20Ni, the 5 wt% Ni catalyst showed better catalytic activity, reaching a furfural conversion of 100 mol% and a selectivity to furan of 98 mol%, after 5 h of time-on-stream at 230°C.

关键词： Ni-SBA-15 Furfural Hydrogenation Furan Furfuryl Alcohol

Turbo-taxonomy to assemble a megadiverse lichen genus:seventy new species of Cora(Basidiomycota:Agaricales:Hygrophoraceae),honouring David Leslie Hawksworth’s seventieth birthday

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Fungal Diversity 2017年第3期84卷 139-207页

作者： Robert Lücking Manuela Dal Forno Bibiana Moncada Luis Fernando Coca Leidy Yasmín vargas-Mendoza André Aptroot Laura Juliana Arias Betty Besal Frank Bungartz Diego Mauricio Cabrera-Amaya Marcela E.S.Cáceres José Luis Chaves Sionara Eliasaro Martha Cecilia Gutiérrez Jesús E.Hernández Marin María de los Ángeles Herrera-Campos María E.Holgado-Rojas Harald Jonitz Martin Kukwa Fabiane Lucheta Santiago Madriñán Marcelo Pinto Marcelli Suzana Maria de Azevedo Martins Joel A.Mercado-Díaz Jorge Alberto Molina Eduardo A.Morales Peter R.Nelson Freddy Nugra Francisco Ortega Telma Paredes Ayda Lucía Patiño Rouchi Nadine Peláez-Pulido Rosa Emilia Pérez Pérez Gary B.Perlmutter Eimy Rivas-Plata Javier Robayo Camilo Rodríguez Diego Fernando Simijaca Edier Soto-Medina Adriano Afonso Spielmann Alejandra Suárez-Corredor Jean-Marc Torres Carlos Alberto vargas Alba Yánez-Ayabaca Gothamie Weerakoon Karina Wilk Marcela Celis Pacheco Mauricio Diazgranados Grischa Brokamp Thomas Borsch Patrick M.Gillevet Masoumeh Sikaroodi James D.Lawrey Botanical Garden and Botanical Museum Berlin KöniginLuise-Straße 6-814195 BerlinGermany Science Education The Field Museum1400 South Lake ShoreChicagoIL 60605USA Department of Botany Smithsonian InstitutionNational Museum of Natural History10th St Constitution Ave NWWashingtonDC 20560USA Department of Environmental Science and Policy George Mason UniversityFairfaxVA 22030-4444USA Licenciatura en Biologı´a Universidad Distrital Francisco Jose´de CaldasCra.4 No.26D-54Torre de LaboratoriosHerbarioBogota´D.C.Colombia Herbario Universidad de Caldas(FAUC) Edificio BicentenarioCalle 65No.26-10ManizalesA.A.275CaldasColombia ABL Herbarium G.v.d.Veenstraat 1073762 XK SoestThe Netherlands Biologı´a Universidad del Quindı´oCarrera 15 Calle 12 NorteArmeniaQuindı´oColombia 120 Chavis Avenue LexingtonVA 24450USA Charles Darwin Foundation Puerto AyoraSanta Cruz IslandGala´pagosEcuador Schedestraße 8 53113 BonnGermany Jardı´n Bota´nico de Bogota´Jose´Celestino Mutis Avenida Calle 63 No.68-95Bogota´D.C.Colombia Departamento de Biocieˆncias Universidade Federal de SergipeAvenida Vereador Olı´mpio Grandes/n.ItabaianaCEP:49.500-000 SergipeBrazil Laboratorio de Hongos Instituto Nacional de Biodiversidad(INBio)Apdo.22-3100Santo Domingo de HerediaCosta Rica Departamento de Botaˆnica Universidade Federal do Parana´Campus Polite´cnicoSetor de Cieˆncias Biolo´gicasAv.Cel.Francisco H.dos Santoss/nJardim das Ame´ricas81531-980 CuritibaPRBrazil Ingenierı´a Ambiental Universidad Distrital Francisco Jose´de CaldasCarrera 5 Este No.15-82Av.CircumvalarBogota´D.C.Colombia Instituto Experimental Jardı´n Bota´nico Dr.Tobı´as Lasser Centro de Investigacio´n y DesarrolloUniversidad Central de VenezuelaAve.Salvador AllendeJardı´n Bota´nico de CaracasApartado#2156Caracas 1010-AVenezuela Departamento de Bota´nica Instituto de Biologı´aUniversidad Nacional Auto´noma de Me´xicoApartado Postal 70-36704510 Ciudad De Me´xicoMexico Facultad de Ciencias Escuela Profesional de Biologı´aUniv

Following a large-scale phylogenetic study of the lichenized genus Cora(Basidiomycota:Agaricales:Hygrophoraceae),we formally describe 70 new species,honouring the seventieth birthday of David Leslie Hawksworth,one of the preeminent figures in mycology and lichenology in the past 50 *** on an updated phylogeny using the ITS fungal barcoding locus,we now recognize 189 taxa in a genus that until recently was considered to represent a single species;including this contribution,92 of these are formally recognized,including five taxa based on historical names or collections that have not been *** of Cora can be recognized by a combination of morphological(size,colour,lobe configuration,surface hairs,hymenophore size and shape),anatomical(thallus thickness,cortex structure,photobiont type,hyphal papillae),and ecogeographical features(substrate,habitat,distribution),and a keytable allowing the identification of all accepted taxa is *** new species are:Cora accipiter Moncada,Madrin˜a´n&Lücking ***.,*** Moncada,Soto-Medina&Lücking ***.,*** Moncada,Dal Forno&Lücking ***.,*** Dal Forno,Chaves&Lücking ***.,*** Moncada,***ı´guez&Lücking ***.,*** Lücking,Moncada&*** ***.,*** Moncada,Ya´nez-Ayabaca&Lücking ***.,*** Moncada,Patin˜o&Lücking ***.,*** Lücking,***&Dal Forno ***.,*** Holgado,Rivas Plata&Perlmutter ***.,*** Dal Forno,Eliasaro&Spielmann ***.,*** Nugra,Dal Forno&Lücking ***.,*** Lücking,Martins&Lucheta ***.,*** Moncada,R.-***´rez&Lücking ***.,*** Moncada,***.&Lücking ***.,*** Moncada,CabreraAmaya&Lücking ***.,*** Moncada,R.-***´rez&***.,*** Lücking,***&Dal Forno ***.,*** Moncada,***´rez-Corredor&Lücking ***.,*** Moncada,***&Lücking ***.,***

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