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Search Results: 1 - 10 of 184517 matches for " Fábio Alexandre Leal dos Santos "
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Indoor Air Mycological Survey and Occupational Exposure in Libraries in Mato Grosso-Central Region—Brazil  [PDF]
Diniz Pereira Leite Júnior, Ronaldo Sousa Pereira, Washington Santos de Almeida, Sara de Almeida Alves Sim?es, Ana Caroline Akeme Yamamoto, Janaina Vasconcellos Ribeiro de Souza, Evelin Rodrigues Martins, Fábio Alexandre Leal dos Santos, Rosane Christine Hahn
Advances in Microbiology (AiM) , 2018, DOI: 10.4236/aim.2018.84022
Abstract: Background: Indoor air quality in environments where there is great circulation of people, posing risks to the health of its occupants, including allergic problems, infections and contaminations, can be aided by climatic factors, chemicals and biological agents housed in these environments, influencing the location and providing favorable conditions for the degradation of bibliographic collections. The present study investigated the presence of fungi in indoor environments in seven public and private libraries in the central region of Brazil, Mato Grosso, and verified the impact on occupational health. Results: A total of 26,194 fungal specimens were isolated from 342 dust samples collected using three techniques: Andersen’s sampler (12.3%), exposure plate dish (25.1%) and sterile swab (62.6%). A total of 184 fungal species were identified: 156 (84.8%) mycelial fungi and 28 (15.2%) yeast fungi, belonging 54 fungal genera, 43 (79.6%) mycelial fungi and 11 (20.4%) yeast fungi. The genus Aspergillus (40.6%) was one of the main fungi present in indoor air. Aspergillus niger (12.3%) was identified as the most prevalent species in literary environments, followed by Cryptococcus spp. (7.1%) and Cladosporium cladosporioides (7.0%). In relation to seasonal distribution, there was a greater fungal isolation in the dry season (54%); followed by the rainy season (46%). Conclusion: These results suggest the substrates researched in the evaluated environments presented in the form of documents, books and papers associated with dust and air humidity become suitable for microbiological proliferation. These findings highlight the importance of minimizing the risk of exposure to fungal agents, identified in pathogenic and toxigenic microenvironments in library collections.
Aquatic Phoretic Mites (Acari: Hydrachnidia) Associated with Ectoparasitism of Mosquitoes (Diptera: Culicidae) in the Midwest Region of Brazil  [PDF]
Fábio Alexandre Leal dos Santos, Sirlei Frank Thies, Aldimara Vaillant Gon?alves, Klaucia Rodrigues Vasconcelos, Monaly da Silva Ribeiro, Junio de Souza Damasceno, Elisangela Santana de Oliveira Dantas, Diniz Pereira Leite Júnior
Advances in Entomology (AE) , 2016, DOI: 10.4236/ae.2016.43015
Abstract: Water mites (Hydrachnidia) are common external parasites of the medically important mosquitoes (Culicidae). Between April 2014 and April 2015, 64 mites from three genus, Arrenurus 71.9%, Limnochares 3.1%, and Hydrachna 25.0%, were collected from female mosquitoes in two rural locations near Cuiabá, Mato Grosso, Brazil. Dipterous species parasitized by water mites belonging to seven species: Anopheles (Nys.) darling, An. evansae, Aedes (Och.) scapularis, Ae. serratus, Mansonia (Man.) wilsoni, Psorophora (Jan.) ferox, Ps. varipes. The most common specimens to accommodate the water mites were Anopheles (Nys.) darlingi and Psorophora (Jan.) varipes. The prevalence of parasitism of mosquitoes by water mites found in this study was less than 5. However, few studies have addressed the ecological role of mites and their biotopes, as well as host-parasite interactions in Brazil.
Democracia, arenas decisórias e política econ?mica no governo Lula
Loureiro, Maria Rita;Santos, Fábio Pereira dos;Gomide, Alexandre de ávila;
Revista Brasileira de Ciências Sociais , 2011, DOI: 10.1590/S0102-69092011000200004
Abstract: this paper analyzes the characteristics of the fiscal policy in lula's government, emphasizing its content and decision-making style in a comparative perspective, both with prior governments and between his two terms in office. the analysis is contextualized in the framework of the challenges introduced by the international integration model adopted in brazil during the 1990s and by the expansion of social demands brought by the new democratic order. in spite of limits imposed by financial markets that ask for credibility, fiscal restrictions and high levels of primary surplus, the paper points out that there is room to orienting the fiscal policy towards other goals: economic growth and internal demand stimulus by means of income transfer programs. that was made possible, to a great extent, by the expansion of governmental decision-making arenas and by the adoption of a style of decision-making based more on negotiations.
Angélica de Cássia O. Carneiro,Benedito Rocha Vital,Alexandre dos Santos Pimenta,Fábio Akira Mori2
CERNE , 2001,
Fator capacidade de fósforo em solos de pernambuco mineralogicamente diferentes e influência do pH na capacidade máxima de adsor??o
Broggi, Fábio;Oliveira, Alexandre Campelo de;Freire, Fernando José;Freire, Maria Betania Galv?o dos Santos;Nascimento, Clístenes Williams Araújo do;
Ciência e Agrotecnologia , 2011, DOI: 10.1590/S1413-70542011000100009
Abstract: phosphate maximum capacity (fcp) is defined by the ratio of equilibrium between the amount of factor p (q) and factor intensity (i) and represents a measure of the soil ability to maintain a certain level of p in solution. the characteristics and content of the constituents of clay minerals are responsible for a greater or lesser fcp, interfering in soil-plant relations. moreover, the soil ph has affected adsorption, and in other cases, it has shown small and inconsistent change in the maximum adsorption capacity of p (cmap). thus, this study aimed to determine the different fcp soil mineralogy in pernambuco; to correlate physical and chemical characteristics of soils with pbc and to evaluate the effect of ph on the cmap. subsurface soil samples from four different soils were characterized chemically and physically determined, and the pbc was determined. these samples were corrected with caco3 and mgco3 in a 4:1 ratio and incubated for 30 days, except the vertisol. the cmap was determined before and after correction of the soil. the experiment consisted of a 4 x 2 factorial (four soils with and without correction), distributed in randomized blocks with three replicates. soil characteristics that best reflected the pbc were the remaining p (p-rem) and mpac. regardless of the constituents of clay mineralogy, soil with high aluminum levels had increased cmap after correction. the energy of adsorption (ea) in the limed soils was on average significantly lower, regardless of the soil.
Características estruturais e agron?micas da Brachiaria brizantha cv. Xaraés submetida a doses de nitrogênio
Cabral, Welton Batista;Souza, Alexandre Lima de;Alexandrino, Emerson;Toral, Fábio Luiz Buranelo;Santos, Josimar Nogueira dos;Carvalho, Marcus Vinícius Pavoni de;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000400004
Abstract: the objective of this experiment was to evaluate the structural characteristics and agronomic traits of brachiaria brizantha cv. xaraés under different nitrogen levels (0, 125, 250, 375 and 500 kg.ha-1 of n) grown in campus rondonópolis, mato grosso, in the period 10/12/2006 to 08/23/2007. the treatments were arranged in a randomized design with four repetitions. the results were submitted to statistical analysis by grouping the data into two periods: rain and throughout the year. the n influenced the number of leaves appeared at the time rainy, and the number of green leaves. the number of leaves was influenced by n rates during the rain and throughout the year. there was an increase of 27% in the average length of the leaf blade to the dose of 343.9 kg ha-1 n for the rainy season. the density of tillers was influenced by n rates for both evaluation periods. since the height of the plants was influenced by n rates for the two seasons evaluated. the increased availability of dry per hectare was 87.5% for the highest n in the water (333.3 kg ha-1 n) compared with the control treatment. nitrogen fertilization positively influences all characteristics related to growth and production mass, especially during the rainy season, when the fertilization must be divided into four or five doses, with no need for fertilization in the dry season.
Avalia??o da disponibilidade, adsor??o e níveis críticos de fósforo em diferentes solos
Broggi, Fábio;Freire, Fernando José;Freire, Maria Betania Galv?o dos Santos;Nascimento, Clístenes Williams Araújo do;Oliveira, Alexandre Campelo de;
Revista Ceres , 2010, DOI: 10.1590/S0034-737X2010000200017
Abstract: the evaluation of p availability in soils with different mineralogy using a same methodology can produce inappropriate estimates. the aim of this work was to evaluate p availability using different chemical extractors in soil with high ca concentration, in comparison with hemathitic soil, and to study the relations between the critical levels and the p adsorption as a function of the soil incubation time. an experiment using subsurface samples of a orthic ebanic vertisol (veo) (mollisol), clay textured with predominance of 2:1 clay mineral rich in ca and a distroferric red nitosol (nvdf) (nitosol), high clay content, predominantly hematitic, colleted at the semi-arid and humid regions of pernambuco state, brazil, respectively. the p doses were defined as a function of the levels 0, 0.2, 0.4, 0.8 and 1.0 of the maximum capacity of p adsorption (mcpa) of each soil and incubated for 90, 60, 30, 15 and 0.5 days. the experiment was carried out in a greenhouse in a factorial scheme (2 soils, 5 p doses and 5 different periods of incubation), in a randomized blocks design, with three replicates each. the available p was determined by the extractors mehlich-1, mehlich-3 and bray-1 and corn was used as indicative plant. the capacity of prediction of available p by mehlich-1 was not suitable for the soil with predominance of 2:1 clay mineral rich in ca. for this special case, the highest operationallity of bray-1 accredits this extractor as the most recommended. the critical levels in the soil decreased with the increase in incubation time, independently of the soil.
Adaptation to Long-Term Rainfall Variability for Robusta Coffee Cultivation in Brazilian Southeast  [PDF]
Lima Deleon Martins, Fernando Coelho Eugenio, Wagner Nunes Rodrigues, Sebasti?o Vinicius Batista Brinati, Tafarel Victor Colodetti, Bruno Fardim Christo, Dionicio Belisario Luis Olivas, Fábio Luiz Partelli, José Francisco Teixeira do Amaral, Marcelo Antonio Tomaz, José Domingos Cochicho Ramalho, Alexandre Rosa dos Santos
American Journal of Climate Change (AJCC) , 2018, DOI: 10.4236/ajcc.2018.74030
Abstract: Coffee is one of the world most traded agricultural commodities. Currently, a lot of attention has been on Robusta coffee (Coffea canephora Pierre ex A. Froehner) because it seems to evidence a greater tolerance to extreme climatic events than Arabica coffee (C. arabica L.). Despite this, only a few works have been developed aimed at discriminating the climatic vulnerability in regions which prioritize robust coffee production. The aim of this work was to analyze historical climatic variables in space and time for the characterization of climatic vulnerability of micro-regions, in search of mitigation and adaptation, which might support the improvement of production systems of C. canephora coffee trees. The case study was carried out for one of the largest production regions of Robusta coffee of the world, in Brazil, geographically located between the 39°38' and 41°50' West longitude meridians and the 17°52' and 21°19' South latitude parallels. The vulnerability was characterized by the spatial and temporal variation of rainfall and rainfall seasonal pattern (based on 30 years of historical data), elements of climatic water balance, elevation and area planted with Robusta coffee. The choice of mitigation and adaptation were based on widely validated criteria. Overall, the results show that the vulnerability of Robusta coffee is related to low index of rainfall, the rainfall seasonability and the water deficiency. In the studied region, there is approximately 42% of some type of water vulnerability during the year, with a severe to medium scale; this vulnerability is very pronounced in regions farther away from the coast of the Atlantic Ocean, since for a year approximately 92% of them are water deficient. In addition, the data show that this distance from the ocean implies a reduction of 75% in the phases of water surplus not only. The strategies of greater potential for adaptation and mitigation are related to the planting of improved genotypes, utilization of polycultures systems, increasing plant density, the implementation of irrigation systems and the management of spontaneous plants.
Desempenho de bovinos jovens das ra?as Aberdeen Angus e Hereford, confinados e alimentados com dois níveis de energia
Brondani, Ivan Luiz;Sampaio, Alexandre Amstalden Moraes;Restle, Jo?o;Rosa, Joilmaro Rodrigo Pereira;Santos, Cássio Vieira Marques dos;Fernandes, Maurício dos Santos;Garagorry, Fábio Cervo;Heck, Ivan;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000900017
Abstract: the feedlot performance of aberdeen angus (aa) and hereford (he) steers submitted to two energy levels, in a 2 x 2 factorial scheme, being the lower level of 3.07 (12% of concentrate in the diet) and the higher of 3.18 mcal of digestible energy/kg of dm (32% of concentrate in the diet), was evaluated. eight steers of each breed were used, with nine months of age and average initial weight of 220.31 kg. the animals were confined until the estimated carcass weight reached 190 kg of average minimum weight. aa animals showed higher dm intake per 100 kg of live weight (2.27 vs 2.10%) and per unit of metabolic weight (91.4 vs 86.4 g). animals fed with the higher energy level showed higher dm intakes per day (6.31vs 5.71kg), per 100kg of live weight (2.26 vs 2.11%), per unit of metabolic weight (92.28 vs 85.44g), of digestible energy (de) (20.58 vs 18.13 mcal/day) and crude protein (cp) (0.845 vs 0.759 kg/day), beyond a higher daily weight gain (1.409 vs 1.250 kg). the animals that received the lower level showed higher intakes of neutral detergent fiber (ndf), kg/day (2.23 vs 2.07 kg) and of acid detergent fiber (adf), kg/day (1.13 vs 1.01 kg). the dm/day, neutral detergent fiber and acid detergent fiber intakes showed a linear behavior for feedlot period, when the animals received the lower energy level, and a quadratic pattern when the animals received the higher energy level. for dm intake expressed as percentage of live weight and per unit of metabolic weight, a cubic behavior was observed, for feedlot period for the animals fed with the lower energy level, however, for the animals fed diet with the higher level of energy the behavior was quadratic. the digestible energy intake had a linear behavior in the lower energy level and a cubic behavior in the higher energy level, according to periods.
Temporal distribution of Aedes aegypti Linnaeus (Diptera, Culicidae), in a Hospital in Cuiabá, State of Mato Grosso, Brazil
Carvalho-Leandro, Danilo de;Ribeiro, Ana Lúcia Maria;Rodrigues, Jorge Senatore Vargas;Albuquerque, Cleide Maria Riberiro de;Acel, Anagela Maria;Leal-Santos, Fábio Alexandre;Leite Jr, Diniz Pereira;Miyazaki, Rosina Djunko;
Revista Brasileira de Entomologia , 2010, DOI: 10.1590/S0085-56262010000400025
Abstract: this study aimed at registering and monitoring the presence of aedes aegypti in the university hospital júlio muller, cuiabá-mt, as well as investigating the influence of temperature and rainfall on its temporal distribution and egg densities in ovitraps. the study was performed from april/2007 to march/2008, utilizing ovitraps with 10% of hay infusion and a wood paddle as an oviposition substrate. for surveillance, one ovitrap was placed in each of the 12 points distributed throughout the hospital. ovitraps were collected monthly at the end of a 5-day installation period. after egg counting, wood paddles were immersed in water to allow larval eclosion for species identification through optical microscopy. egg density index (edi), positive ovitraps index (poi), and mean number of eggs (mne) were used for data analysis. the presence of a. aegypti in the hospital was registered throughout the study period, except in july. the mne was proportionally higher in the internal area (n= 8.47 eggs/paddle) when compared to the external area (n= 5.46 eggs/paddle), and was higher in september/october 2007 and january/february 2008. a significant increase in edi, poi and mne was registered in periods where the average temperature was higher, and the increase in poi was also concomitant with an increase in rainfall. the continuous presence of a. aegypti in the hospital throughout the study period, points out the need of including this mosquito in the arthropod control list in this environment. this is particularly important, considering that a. aegypti is an important vector of several arboviroses.
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