检索结果-南通市图书馆

Open Journal of Epidemiology 2018年第4期8卷 259-275页

作者： julio cesar barreto da silva Hugo Abi Karam Carlos José Saldanha Machado Programa de Pós-graduaç o em Meio Ambiente (PPGMA) Universidade do Estado do Rio de Janeiro (UERJ) Rio de Janeiro Brasil Departamento de Meteorologia do Instituto de Geociências (IGEO) Centro de Ciências Matemáticas e da Natureza (CCMN) Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brasil Instituto de Comunicaç o e Informaç o Científica e Tecnológica em Saúde Laboratório de Informaç o Científica e Tecnológica em Saúde Funda&#231 o Oswaldo Cruz (FIOCRUZ) Ministério da Saúde Rio de Janeiro Brasil

Recent analysis indicates that the numbers of dengue cases may be as high as 400 million/year in the world. According to the Ministry of Brazilian Health, in 2015, there were 1,621,797 probable cases of dengue in the country including all classifications except discarded, the highest number recorded in the historical series since 1990. Many studies have found associations between climatic conditions and dengue transmission, especially using generalized models. In this study, Generalized Additive Models (GAM) was used associated to visreg package to understand the effect of climatic variables on capitals of Northeast Brazilian, from 2001 to 2012. From 12 climatic variables, it was verified that the relative humidity was the one that obtained the highest correlation to dengue. Afterwards, GAM associated with visreg was applied to understand the effects between them. Relative humidity explains the dengue incidence at an adjusted rate of 78.0% (in São Luis-MA) and 82.3% (in Teresina-PI) delayed in, respectively, -1 and -2 months.

关键词： Aedes aegypti Dengue GAM Visreg Package

Dynamic Modelling of Dengue Epidemics in Function of Available Enthalpy and Rainfall

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Epidemiology 2016年第1期6卷 50-79页

作者： Hugo Abi Karam julio cesar barreto da silva Augusto José Pereira Filho José Luis Flores Rojas Instituto de Geociências IGEO-CCMN-UFRJ Universidade Federal do Rio de Janeiro Rio de Janeiro Brasil Departmento de Estatística CCET-UFRN Universidade Federal do Rio Grande do Norte Natal Brasil Instituto de Astronomia Geofísica e Ciências Atmosféricas IAG-USP Universidade de Sao Paulo SP Brasil

In this work, we present results of an investigation of environmental precursors of infectious epidemic of dengue fever in the Metropolitan Area of Rio de Janeiro, RJ, Brazil, obtained by a numerical model with representation of infection and reinfection of the population. The period considered extend between 2000 and 2011, in which it was possible to pair meteorological data and the reporting of dengue patients worsening. These data should also be considered in the numerical model, by assimilation, to obtain simulations of Dengue epidemics. The model contains compartments for the human population, for the vector Aedes aegypti and four virus serotypes. The results provide consistent evidence that worsening infection and disease outbreaks are due to the occurrence of environmental precursors, as the dynamics of the accumulation of water in the breeding and energy availability in the form of metabolic activation enthalpy during pre-epidemic periods.

关键词： Modelling Dengue Epidemics Environmental Enthalpy Environmental Precursors of Dengue Epidemics

Three-Dimensional Stress Concentration Factor in Finite Width Plates with a Circular Hole

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Mechanics 2013年第3期3卷 153-159页

作者： Murilo Augusto Vaz julio cesar Ramalho Cyrino Gilson Gomes da silva Coordenacao dos Programas de Pós-Graduacao de Engenharia Post-Graduate School of Engineering Federal University of Rio de Janeiro Rio de Janeiro Brazil

The three-dimensional stress concentration factor (SCF) at the edge of elliptical and circular holes in infinite plates under remote tension has been extensively investigated considering the variations of plate thickness, hole dimensions and material properties, such as the Poisson’s coefficient. This study employs three dimensional finite element modeling to numerically investigate the effect of plate width on the behavior of the SCF across the thickness of linear elastic isotropic plates with a through-the-thickness circular hole under remote tension. The problem is governed by two geometric non-dimensional parameters, i.e., the plate half-width to hole radius (W/r) and the plate thickness to hole radius (B/r) ratios. It is shown that for thin plates the value of the SCF is nearly constant throughout the thickness for any plate width. As the plate thickness increases, the point of maximum SCF shifts from the plate middle plane and approaches the free surface. When the ratio of plate half-width to hole radius (W/r) is greater than four, the maximum SCF was observed to approximate the theoretical value determined for infinite plates. When the plate width is reduced, the maximum SCF values significantly increase. A polynomial curve fitting was employed on the numerical results to generate empirical formulas for the maximum and surface SCFs as a function of W/r and B/r. These equations can be applied, with reasonable accuracy, to practical problems of structural strength and fatigue, for instance.

关键词： Stress Concentration Factor Plates with Circular Hole Finite Element Analysis

Conformal Antennas Array for Wireless Communications at 2.5 GHz

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

通讯和计算机（中英文版） 2016年第5期13卷 266-269页

作者： Humberto cesar Chaves Femandes Almir Souza E silva Neto Tarcisio da silva barreto Federal University of Rio Grande do Norte Federal Institute of Education Science and Technology of Paraiba Campus Universitario Lagoa Nova CEP 59078-970 Natal/RN- Brazil

The Importance of Digital TV for Countries in Development： A Case Study of Brazil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

通讯和计算机（中英文版） 2012年第7期9卷 847-851页

作者： julio cesar Ferreira da silva Hildegard Paulino Barbosa Ed Porto Bezerra Tatiana Aires Tavares Laboratory of Digital Video Applications Department of Informatics Federal University of Parayba Brazil Departament of Systems and Computer Federal University of Campina Grande Brazil

Dengue Climate Variability in Rio de Janeiro City with Cross-Wavelet Transform

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2022年第3期13卷 261-276页

作者： Suellen Araujo Franco dos Santos Hugo Abi Karam Augusto José Pereira Filho Jú lio cesar barreto da silva Jose Luis Flores Rojas julio Migue Angeles Suazo Isela Leonor Vá squez Panduro cesar Arturo Sanchez Peñ a Departamento de Meteorologia Instituto de Geoci&ecirc ncias Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brasil Departamento de Ciê ncias Atmosfé ricas Instituto de Astronomia Geofísica e Ci&ecirc ncias Atmosfé ricas Universidade de S&atilde o Paulo (IAG-USP) S&atilde o Paulo Brasil Programa de Pós-Graduaç ã o em Ciê ncias Ambientais Universidade Estadual do Rio de Janeiro (UERJ) Rio de Janeiro Brasil Instituto Geofísico do Peru (IGP) Lima Per&uacute Facultad de Ingeniería Forestal y Ambiental. Universidad Nacional Autó noma de Tayacaja daniel Herná ndez Morillo (UNAT) Pampas Per&uacute Universidad Tecnoló gicadel Perú Faculdad de Engenier&iacute a Industrial Lima Per&uacute Centro de Previsã o do Tempo e Estudos Climá ticos Cachoeira Paulista Brasil Programa de Pó s-Graduaç ã o em Computaç ã o Aplicada Instituto Nacional de Pesquisas Espaciais (INPE) S&atilde o José dos Campos S&atilde o Paulo SP Brasil

Dengue is one of the most prominent tropical epidemic diseases present in the Rio de Janeiro city and Southeast part of Brazil, due to the widespread conditions of occurrence of the dengue vector, the mosquito Aedesaegypti, such as high-temperature days interlaced with afternoon or nocturnal rainstorms in summer. This work has the objective of investigating the relationships between variabilities of the El Ni?o-South Oscillation (ENSO) and greater epidemics of dengue in Rio de Janeiro city. To accomplish this goal, the analysis and signal decomposition by cross-wavelet transform (WT) was applied to obtain the cross variability associated with variations of power and phase of both signals by characteristic periods and along with the time series. data considered in the analysis are (the decimal logarithm of normalized value) of the monthly available notifications of dengue worsening, provided by the public health system of Brazil, and the Southern Oscillation Index (SOI) Ni?o 3.4 data, provided by the National Oceanic and Atmospheric Administration (NOAA), in the period 2000-2017. A maximum cross-wavelet power close to 0.45 was obtained for the representative period of 1 year and also to periods between 3 and 4 years, associated with the positive phase of the SOI index (i.e. , La Ni?a) or with a transition to the positive phase. The evolution of the combined variability of SOI and dengue can be expressed by progressive differences in phase along the time, eventually resulting in yielding phases (i.e., La Niña-Dengue epidemic).

关键词： Dengue Fever Cross-Wavelet Transform Analysis El Niño-Southern Oscillation Index

Cultivation of Perennial Herbaceous Legumes in Weed Management in Coffee Plantation on the Cerrado

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Agricultural Science and Technology(B) 2013年第6期3卷 420-428页

作者： julio cesar Freitas Santos Aquiles Junior da Cunha Francisco Affonso Ferreira Ricardo Henrique silva Santos Ney Sussumu Sakiyama Paulo cesar de Lima Brazilian Agricultural Research Corporation-Embrapa Brasilia Distrito Federal 70770-901 Brazil Agronomy Academical Center of the Cerrado-Patroclnio Patroclnio Minas Gerais 38740-000 Brazil Department of Crop Science Universidade Federal de Vigosa Vicosa Minas Gerais 36571-000 Brazil Minas Gerais Agricultural Research Corporation-Epamig Vigosa Minas Gerais 36571-000 Brazil

The aim of this study was to evaluate the cultivation of perennial herbaceous legumes on weed control and yield of the coffee crop in the Cerrado. The experimental design was a randomized complete block with four replications. The 10 treatments tested in factorial 4 × 2 ＋ 2, were four legumes： forage peanut （Arachis pintoi）, hybrid Java （Macrotyloma axillare）, perennial soybean （Neonotonia wightii） and wild ground nut （Calopogonium mucunoides）; two forms in the interrows of coffee plants with two and three rows of legumes spaced by 0.50 m and 0.25 m, respectively; and two additional treatments consisted of hand weeding with hoe and chemical control with glyphosate. The hybrid Java and wild ground nut in the first year and the hybrid Java and perennial soybean in the second year, all followed by forage peanut, promoted lower density and biomass of the weeds. The wild ground nut in the first year and forage peanut in the second year showed higher soil cover. The hybrid Java had its highest biomass production in two years, and wild ground nut being higher in the first year. The cultivation of perennial herbaceous legumes promoted weed control without interfering in the productivity of the coffee crop.

关键词： Legumes intercropping soil cover weed control coffee crop weed management.

Evaluation of antibacterial and toxicological activities of essential oil of Ocimum gratissimum *** its major constituent eugenol

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Bioscience 2022年第6期50卷 2152-2159页

作者： julio cesar silva Raimundo Luiz silva Pereira Thiago Sampaio de Freitas Janaína Esmeraldo Rocha Nair silva Macedo Carla de Fatima Alves Nonato Marina Leite Linhares daniely Sampaio Arruda Tavares Francisco Assis Bezerra da Cunha Henrique Douglas Melo Coutinho Sidney Gonçalo de Lima Francisco Nascimento Pereira-Junior Francisco Paulo Araújo Maia Ivo Cavalcante Pita Neto Fabiola Fernandes Galvão Rodrigues George Joaquim Garcia Santos Department of Biological Chemistry Regional University of CaririR.Cel.Antonio Luis 116163105000CratoCEBrazil University Center Doutor Leão Sampaio Av.Leão Sampaio 40063040000Juazeiro do NorteCEBrazil Research and Development Center for Medicines Federal University of CearaR.Coronel Nunes de Melo 100060430275FortalezaCEBrazil Chemistry Department Federal University of PiauiCampus Universitário Ministro Petrônio Portella64049550TeresinaPIBrazil Center for Agricultural and Biodiversity Sciences - CCAB Federal University of CaririCratoCearáBrazil CECAPE - College of Dentistry Juazeiro do NorteCE63024-015Brazil

The present study aimed to comparatively analyze the antibacterial activity,combined with antibiotics,and toxicological activity of the essential oil of *** *** its major compound,*** phytochemical analysis of the essential oil was performed by gas chromatography coupled with mass *** minimum inhibitory concentration and combined antibiotic activity were performed by *** melanogaster was the model organism chosen to evaluate the toxicological response of *** chromatographic assay showed eugenol as the major compound of the essential oil of *** *** microbiological assays showed that in terms of antibacterial activity,both products showed similar activity,quite significant in Gram-negatives,such as those of strains of Pseudomonas *** results were verified in the modulatory activity,allowing the verification that the bioactivity performed by the essential oil of *** *** mainly influenced by its major *** the EC50 of the compounds varied subtly,the essential oil was less toxic compared to *** information obtained in the present study demonstrates that the essential oil of *** *** a promising antibacterial agent and better tolerated than its majority compound alone,in the model organism ***.

关键词： Antibacterial agents Drosophila melanogaster Eugenol Ocimum gratisismumum L.essential oils

Potential of Two <i>Metarhizium anisopliae</i>(Clavicipitaceae) Isolates for Biological Control of <i>Diatraea saccharalis</i>(Lepidoptera: Crambidae) Eggs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Entomology 2022年第1期10卷 63-76页

作者： Camila Vieira da silva Bruno Vinicius daquila Larissa Carla Lauer Schneider Ronaldo Roberto Tait Caleffe julio cesar Polonio daniele Araujo Canazart Satiko Nanya Helio Conte Laboratory of Biological Control Morphology and Cytogenetics of Insects Department of Biotechnology Genetics and Cell Biology State University of Maringá (UEM) Maringá Paraná Brazil Laboratory of Microbial Biotechnology Department of Biotechnology Genetics and Cell Biology State University of Maringá (UEM) Maringá Paraná Brazil

Chemical pesticides tend to accumulate in soil, resulting in human and environmental health risks. Hence, alternative methodologies involving chemical pesticides are beneficial for the control of agricultural pests. Metarhizium anisopliae is an entomopathogenic fungus that acts on different developmental stages of pest insects such as Diatraea saccharalis, a holometabolic lepidopteran with high potential for infestation in sugarcane crops. The present study evaluated the biocontrol effect of M. anisopliae isolates MT and E9 on D. saccharalis eggs at different ages by investigating the external and internal morphological alterations in treated eggs. Conidial suspensions of M. anisopliae isolated from MT and E9 at concentrations of 107 conidia/mL were applied to eggs of D. saccharalisdana;"> aged 0, 24, 48, 72, 96 and 120 h. The eggs were observed every 24 h during development (0 h to 144 h). Samples were collected for observational, histological, and ultrastructural analyses. We found that the MT isolate caused 100% inviability of eggs aged 0 - 72 h, 144 h after the bioassays, while the effect of the E9 isolate varied between 49.40% and 93.75%. M

关键词： Entomopathogen Fungi Management Sugarcane Sustainability

Fast Determination of Benzodiazepines in Human Urine via Liquid-Liquid Extraction with Low Temperature Partitioning and LC-HRMS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Analytical Chemistry 2012年第2期3卷 118-124页

作者： Elisangela Jaqueline Magalhaes Clesia Cristina Nascentes Rodinei Augusti Maria Eliana Lopes Ribeiro de Queiroz julio cesar Cardoso da silva Robson Jose de Cassia Franco Afonso Departamento de Quimica Universidade Federal de Minas GeraisBelo HorizonteBrazil Departamento de Quimica Universidade Federal de VicosaVicosaBrazil Departamento de Quimica Universidade Federal de Ouro PretoOuro PretoBrazil

A simple and high-throughput method to simultaneously determine selected benzodiazepines (i.e., diazepam, lorazepam, clonazepam, and bromazepam) in urine was developed and validated. The entire methodology consisted of the application of an innovative extraction/cleanup procedure, namely liquid-liquid extraction with low-temperature partitioning (LLE-LTP), and analysis by liquid chromatography combined with high-resolution mass spectrometry (LC-HRMS). The LLE-LTP procedure was optimized via factorial design and by evaluating crucial variables, specifically the freezing mode (either slow or fast), the urine/acetonitrile volume ratio, and the sample ionic strength. The benzodiazepines were quantified using matrix-matched calibration curves where the following parameters were assessed by validation protocol: in general, linearity range of 17 - 200 μg?L–1 (r > 0.9957);limits of detection lower than 5 μg?L–1;relative standard deviations (RSD) lower than 12.5%;and accuracy ranging from 72.3 to 117%. To test this procedure’s performance, the method was applied to determine the content of diazepam in actual urine samples. The validation results obtained for the method demonstrated that the present methodology could be potentially applied in proficient laboratories as a routine approach for determining benzodiazepines compounds content in urine.

关键词： Benzodiazepines Urine LC-HRMS Extraction Procedure Low-Temperature Partitioning