Associação de silicato de potássio a diferentes fungicidas no controle mancha alvo na cultura da soja.

MAYER, M. C.: grafia correta MEYER, M. C

Thermodynamic parameters of bonds in glassy materials from viscosity-temperature relationships

Doremus's model of viscosity assumes that viscous flow in amorphous materials is mediated by broken bonds (configurons). The resulting equation contains four coefficients, which are directly related to the entropies and enthalpies of formation and motion of the configurons. Thus by fitting this viscosity equation to experimental viscosity data these enthalpy and entropy terms can be obtained. The non-linear nature of the equation obtained means that the fitting process is non-trivial. A genetic algorithm based approach has been developed to fit the equation to experimental viscosity data for a number of glassy materials, including SiO2, GeO2, B2O3, anorthite, diopside, xNa2O–(1-x)SiO2, xPbO–(1-x)SiO2, soda-lime-silica glasses, salol, and α-phenyl-o-cresol. Excellent fits of the equation to the viscosity data were obtained over the entire temperature range. The fitting parameters were used to quantitatively determine the enthalpies and entropies of formation and motion of configurons in the analysed systems and the activation energies for flow at high and low temperatures as well as fragility ratios using the Doremus criterion for fragility. A direct anti-correlation between fragility ratio and configuron percolation threshold, which determines the glass transition temperature in the analysed materials, was found

Topologically disordered systems at the glass transition

The thermodynamic approach to the viscosity and fragility of amorphous oxides was used to determine the topological characteristics of the disordered network-forming systems. Instead of the disordered system of atoms we considered the congruent disordered system of interconnecting bonds. The Gibbs free energy of network-breaking defects (configurons) was found based on available viscosity data. Amorphous silica and germania were used as reference disordered systems for which we found an excellent agreement of calculated and measured glass transition temperatures. We reveal that the Hausdorff dimension of the system of bonds changes from Euclidian three-dimensional below to fractal 2.55 ± 0.05-dimensional geometry above the glass transition temperature

Eficiência de fungicidas no controle de mancha alvo (Corynespora cassiicola) e crestamento foliar de Cercospora (Cercospora kikuchii) em soja.

Este trabalho reporta um dos ensaios cooperativos de controle de mancha alvo da soja, conduzido na safra 2014/15 em Querência, MT, realizado em cultivar M 8210 IPRO, semeada em 16/11/2014, delineamento experimental de blocos casualizados, quatro repetições e parcelas de 18 m2 . Foram realizados três tratamentos fungicidas em estádio R1, aos 21 e 35 dias após a primeira, com exceção do tratamento T8-mancozebe (1125g i.a. ha-1 ), com aplicação extra aos 10 dias após R1. Os tratamentos fungicidas foram compostos de: T2-carbendazim (500 g i.a. ha-1 ), T3-trifloxistrobina+prothioconazol (60+70 g i.a. ha-1 ),T4- piraclostrobina+epoxiconazol+fluxapyroxad (64,8+40+40 g i.a. ha-1 ), T5-piraclostrobina+ fluxapyroxad (116,5+58,4g i.a. ha-1 ), T6-bixafen+prothioconazol+trifloxistrobina (62,5+87,5+ 75g i.a. ha-1 ), T7-azoxistrobina+benzonvindiflupyr (60+30g i.a. ha-1 ), T8-mancozeb (1125g i.a. ha-1 ), T9-mancozebe (1500 g i.a. ha-1 ), T10-azoxistrobina+ciproconazol (60+24g i.a. ha-1 ) e um tratamento controle T1. As médias de severidade da mancha alvo e do crestamento de Cercospora no tratamento T1 foram de 22,3% e 60,0%, respectivamente. O controle mais efetivo da mancha alvo foi verificado com os tratamentos T4, T5 e T6, apresentando controle de 65% a 73%. O tratamento T6 apresentou controle de 100% do crestamento de Cercospora. As maiores produtividades foram verificadas com T3, T4, T5 e T6, variando de 3350 kg ha-1 a 3459 kg ha-1 , valores 32% superior ao T1. As maiores massas de cem grãos foram observadas em T3, T4, e T6, com valores de 15,8g a 16,1g, 17% a 19% superiores ao T1

A remembrance of things (best) forgotten: The 'allegorical past' and the feminist imagination

This is the author's PDF version of an article published in Feminist theology© 2012. The definitive version is available at http://fth.sagepub.com/This article discusses the US TV series Mad Men, which is set in an advertising agency in 1960s New York, in relation to two key elements which seem significant for a consideration of the current state of feminism in church and academy, both of which centre around what it means to remember or (not) to forget

The role of indigenous phlebotomine sandflies and mammals in the spreading of leishmaniasis agents in the Mediterranean region

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