The objective of this study was to determine factors associated with vegetable contamination with zoonotic protozoan. Samples of water, soil and vegetables were collected from July/2014 to May/2016, totaling 83 samples, 21 properties of Londrina region, Paraná, Brazil. DNA amplification of Toxoplasma gondii, Cryptosporidium spp. and Giardia intestinalis in the samples was conducted using polymerase chain reaction (PCR). The PCR results were positive for T. gondii in 12.9% (8/62), Cryptosporidium spp. in 11.3% (7/62) and G. intestinalis in 25.8% (16/62) of the samples. DNA sequencing identified C. parvum in five samples and G. intestinalis Assemblage E in three. The statistical associations demonstrated greater probability of positive samples for T. gondii and for at least one of the three protozoa when the source of irrigation water was the river; a greater chance of positive samples for Cryptosporidium spp. when deer were present on the property; and a smaller chance of positive samples for at least one of the three etiologic agents when soil was supplemented with limestone. The results expose some critical contamination points, providing support for training farmers on good management practices during the production process.

O objetivo deste trabalho foi avaliar o efeito da mistura no tanque entre o herbicida nicosulfuron e o inseticida chlorpirifos sobre o milho híbrido P30F80, as plantas daninhas e a lagarta-do-cartucho. O delineamento experimental utilizado foi o de blocos ao acaso, em esquema fatorial 5x2+3, com quatro repetições. O primeiro fator foi constituído pelas doses de nicosulfuron (0, 10, 20, 30 e 40 g ha-1) + atrazine (1.200 g ha-1) + óleo (900 g ha¹) e o segundo pelas doses do inseticida chlorpirifos (0 e 240 g ha-1). Foram avaliados três tratamentos adicionais: duas testemunhas, com e sem capina, ambas sem inseticida, e uma testemunha com capina e com inseticida. Não ocorreu interação significativa entre doses de nicosulfuron e do chlorpirifos no controle da lagarta-do-cartucho. A mistura no tanque do chlorpirifos com nicosulfuron tornou-se não-seletiva ao milho híbrido P30F80, acarretando redução do número de espigas e do rendimento de grãos de milho. O chlorpirifos não interferiu diretamente na eficiência de controle das plantas daninhas pelos herbicidas, em avaliações realizadas aos 14 e 28 dias após aplicação desses produtos. Todavia, a toxidez causada às plantas de milho pela mistura do chlorpirifos ao nicosulfuron contribuiu para redução do controle cultural das espécies daninhas I. grandifolia e B. decumbens pelo milho.

)] em mistura no tanque do pulverizador e em aplicações seqüenciais com o inseticida chlorpirifos (240 g ha -1) sobre as plantas daninhas e o milho, bem como os efeitos dessa mistura quando aplicada em diferentes estádios fenológicos da cultura. O híbrido de milho utilizado foi o P30F80. Em dois ensaios, os tratamentos consistiram da aplicação do chlorpirifos misturado aos herbicidas no tanque de pulverização, ou aplicado um, dois, três, quatro e cinco dias após a aplicação da mistura de herbicidas; em outro ensaio, testaram-se diferentes épocas de aplicação dos herbicidas no milho (duas, quatro e seis folhas expandidas) associados ou não ao chlorpirifos. A mistura no tanque do chlorpirifos com os herbicidas foi não-seletiva ao milho; todavia, esse inseticida não interferiu na eficiência de controle de plantas daninhas promovida pelos herbicidas nas épocas em que foi aplicado. Intervalos superiores a cinco dias entre a aplicação do chlorpirifos e da mistura de herbicidas foram necessários para evitar intoxicação do milho pelo nicosulfuron. A aplicação da mistura de herbicidas com o chlorpirifos, independentemente do estádio fenológico da cultura, reduziu a altura e a massa seca do milho. Palavras-chave: nicosulfuron, chlorpirifos, interação. ABSTRACT -The objective of this work was to evaluate the effects of the herbicides [atrazine

Participatory breeding of tomato under organic managementThe production and consumption of agricultural products derived from organic agriculture have expanded over the years. This agriculture model needs adapted genotypes to expand the production and meet the population expectation. The participatory breeding play a fundamental role in the development of cultivars that meet the needs of this organic model. The present study aimed to evaluate the performance of 12 inbred lines of tomato under two organic systems. The experiments were carried out at the Farm School of the Universidade Estadual de Londrina (UEL) (experiment I) and at a farm in the Guaravera district (experiment II), Londrina, Paraná State, Brazil. The following lines were evaluated: IPA-6 Super, Lignon, Viradoro, SPH92-434, Rimone, Massag-72, RG Angarten, Missouri91, TXL-1004, H1548, Rio Fuego and CTN. The experimental design used was randomized block with three replications. Six agronomic characters (number and average weight of marketable fruits, total production of marketable fruits, fruit wall thickness, length and fruit diameter) and four organoleptic characteristics (pH, soluble solids, acidity and ratio between soluble solids content and acidity) were evaluated. A wide variability among genotypes and environments studied was observed, and the experiment I was superior to II for characteristics related to yield. According to the results obtained, the H1548 inbred line can be recommended for organic production in the northern Paraná State.

The Magnetic Resonant Wireless Power Transfer (RWPT) is one of the best suitable techniques for mid-range applications. Therefore, there are different approaches to enhance RWPT efficiency, many of them based on metamaterial devices. In this work, the GRadient-INdex (GRIN) technique is applied to increase the coupling between transmitter and receiver coils and collimate the magnetic field, reducing its dispersion. This proposed lens topology operates at 28 MHz and is formed by a 5x5 planar and periodic arrangement of Split Ring Resonators (SRR) unit cells. In each one, a lumped capacitor is added to reduce the lens's size and radially create a refractive index gradient. Then, a four-coil RWPT system is designed at the same operating frequency. Finally, the coils and lenses are prototyped, and the RWPT efficiency is measured in three cases: without any lenses, with a conventional (uniform) metasurface, and with the proposed GRIN lens. The experimental results demonstrate that the RWPT efficiency, which is about 8% without any lenses, becomes almost four times higher (33%) after the inclusion of metasurface GRIN lenses. When the same measurement is carried out with a uniform lens, typical topology in literature, the obtained efficiency is 17.59%, nearly half of the obtained with the proposed metasurface.

Resumo-Neste trabalho implementa-se modelos de componentes eletrônicos desenvolvidos pelo método LE-FDTD e estudase a precisão do método frente aos modelos SPICE. A validação dos modelos desenvolvidos em ambiente computacional se dá por meio da comparação dos resultados de campo elétrico e tensão sobre os componentes obtidos pelo método FDTD com os resultados obtidos em simulações SPICE. Busca-se otimizar os componentes modelados por meio da norma euclidiana dos resultados. A partir disso,é proposta uma técnica de otimização com o objetivo de se encontrar o tamanho da célula de Yee que conduz ao menor erro.

RESUMO -O objetivo deste trabalho foi avaliar o efeito da mistura de herbicidas nicosulfuron + atrazine e o inseticida chlorpirifos sobre o cultivar de milho-pipoca UFVM2, as plantas daninhas e a lagarta-do-cartucho. Utilizou-se o delineamento experimental de blocos completos ao acaso, em esquema fatorial (5x2)+3, com quatro repetições. O primeiro fator foi constituído pelas doses de nicosulfuron (0, 10, 20, 30 e 40 g ha -1 ) + atrazine (1.200 g ha -1 ) + óleo mineral (900 g ha -1 ) e o segundo pelas doses do inseticida chlorpirifos (0 e 240 g ha -1 ). Foram avaliados três tratamentos adicionais: duas testemunhas, com e sem capina, ambas sem inseticida, e uma testemunha com capina e com inseticida. Não se observou interação significativa entre doses de nicosulfuron e do chlorpirifos no controle da lagarta-do-cartucho. A mistura no tanque formada pelo chlorpirifos com os herbicidas promoveu intoxicação às plantas de milhopipoca, principalmente nas maiores doses do nicosulfuron (20, 30 e 40 g ha -1 ). O chlorpirifos não interferiu na eficiência de controle de plantas daninhas pelos herbicidas nem no estande final, no número de espigas por planta, no rendimento e na capacidade de expansão dos grãos de milho-pipoca. (0, 10, 20, 30, and 40 g ha -1 (10, 20 and 40 g ha -1 ). Chlorpirif os did not interfere in herbicide efficiency in controlling weed, nor in the final stand, number of ears, and production and expansion capacity of the popcorn grains. Palavras-chave: chlorpirifos, atrazine, nicosulfuron. ABSTRACT -This study aimed to evaluate the effect of the tank-mixture herbicide nicosulfuron combined with the insecticide chlorpirif os on the popcorn cultivar UFVM2, weeds and fall armyworm. The experiment was arranged in a randomized complete block design, in a (5x2)+3 factorial scheme and four replications. The first factor consisted of nicosulf uron doses

This work presents a computationally efficient approach for the numerical analysis of the integro-differential formulation that models electromagnetic radiation by thin microstrip structures, including the contribution of lumped elements. This proposal is based on the thin-wire approximation to reduce a surface current distribution to a filamentary electric current thus, reducing a tridimensional problem to a unidimensional formulation. In addition, the effects of the dielectric are taken into account by considering the effective electric permittivity and the multipole Debye model that does this correction over the analyzed frequency band. Finally, the results obtained with this proposed technique are compared with measurements and simulation in commercial software, and an error lower than 1.5% was verified for all the analyzed cases with a processing time approximately eight times lower when compared with a full-wave simulation.