Due to the numerous problems raised by the increase in the emission of pollutant gases in the atmosphere, it has become essential a more effective monitoring of air quality. With that, several studies published in recent years have shown a series of mechanisms and techniques with ability to monitor air quality in a variety of ways. Approaching it, this work proposes a platform formed by a wireless sensor network, with the ability to monitor the levels of pollution at several points simultaneously. In addition, was implement the data mining tool, where by means of algorithms classification based on artificial intelligence concepts, it is possible that a more advanced analysis of air quality is performed. The platform was used for the monitoring of two public places, which have large traffic of vehicles and people daily, for a period of 12 consecutive weeks. On weekdays, peaks of 703 ppm of CO2 concentration were measured between 06:00 and 07:00 pm by the sensors located near the highways or avenues with higher traffic of cars. Conversely, indices around 500 ppm were the lowest obtained near 6:00 am where the car traffic is very low. This is the best time for hiking. © 2018 American Institute of Chemical Engineers Environ Prog, 37: 1901–1907, 2018

Phosphorus (P) supply to crops is a major constraint on the quantity and quality of food production in tropical soils, which are often characterized by highly weathered soils having low phosphorus use efficiency. Increasing P fertilizer use efficiency is a good tool for increasing food production to feed an increasing world population. Enhanced efficiency P fertilizer is used to achieve this goal. The lack of information about soil P diffusive flux and corn and common bean yield response with increased efficiency P fertilizers justify studies to evaluate the performance of this type of fertilizer. The aims of this study were to evaluate P diffusive flux and corn and common bean crop response to P sources and rates. A laboratory trial was carried out to evaluate soil P diffusive flux in response to P sources (MAP and Policote coated MAP). Field trials were carried out to evaluate corn and common bean yields in response to P sources (MAP and Policote coated MAP) and rates. Policote, an additive based on water-soluble polymers, is an anionic copolymer with iron an aluminum affinity. Increasing contact time between P-fertilizers and soil reduced phosphorus diffusive flux. Policote coated P-fertilizer resulted in higher phosphorus diffusion than conventional phosphorus fertilizer. Phosphorus fertilization increased corn and common bean yields. Policote coated phosphorus fertilizer resulted in higher agronomic P efficiency use, corn, and common bean yields than conventional phosphorus fertilizer. Policote coated P fertilizer can be used as an enhanced efficiency fertilizer and is a more efficient way to deliver required phosphorous to plants. Reducing farm investment, increasing agricultural profits, preserve phosphatic rocks reserves, and avoid the overuse of phosphate fertilizer could be realized through the rational use of enhanced efficiency fertilizers and fertilizer rate use reduction.

Resumo Visto como um dos principais problemas econômicos e sanitários nas propriedades brasileiras, a mastite bovina mostra-se como uma doença de grande prevalência dentre os animais de produção. Um dos principais gargalos referente a tal enfermidade é a resistência antimicrobiana, em especial, quando a etiologia está associada a bactéria Staphylococcus aureus. Nessa perspectiva, o presente trabalho tem por objetivo discorrer sobre o perfil de resistência de S. aureus e alguns fatores envolvidos. Para tal, os dados foram apresentados na forma de uma revisão narrativa da literatura, tendo como embasamento estudos indexados as plataformas: Portal de Periódicos CAPES-MEC e SciELO. Foi verificado na pesquisa bibliográfica um acentuado perfil de resistência antimicrobiana do S. aureus, sendo os antibióticos menos eficazes a Penicilina e Ampicilina e o de melhor eficácia no tratamento a Cefalotina. Outros dados compilados foram: o de que animais mais velhos possuem maior chance de apresentarem resistência aos tratamentos antimicrobianos e de que em algumas situações o custo-benefício do tratamento de mastite subclínica por S. aureus não traz retornos econômicos, mas somente na melhoria da qualidade do leite. Nesse contexto, ressalta-se a importância de novas pesquisas para traçar a evolução da resistência antimicrobiana do S. aureus, bem como fomentar atividades extencionistas para educação no campo sobre os corretos procedimentos terapêuticos da mastite bovina.

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