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Correction of Acidity of a Brazilian Cerrado Oxisol with Limestone and Wood Ash on the Initial Growth of Cowpea

Agricultural Sciences 2019年第7期10卷 841-851页

作者： Edna Maria Bonfim-Silva Alisson Silva Costa Jefferson Vieira José andré pereira freire ferraz Ana Paula Alves Barreto Damasceno Tonny José Araújo da Silva Department of Agricultural and Environmental Engineering Institute of Agricultural Sciences and Technology Federal University of Mato Grosso Rondonópolis Brazil

Among Brazilian soils orders, there are some of it classified as acid soils, which need correction to guarantee crop productivity. Currently, limestone is the most used soil corrective and wood ash has been a sustainable alternative to this process. Thus, the objective was to evaluate the effect of two correctives of soil acidity on an Oxisol collected in the Brazilian Cerrado area using limestone and wood ash and the effect of soil correction on initial growth of cowpea. Two greenhouse experiments were carried out: 1) with limestone, using base saturation levels (V%) of 0, 20, 40, 60 and 80;and 2) wood ash, with doses of 0, 8, 16, 24 and 32 g⋅dm−3, both in five randomized blocks. At 40 days after sowing, it was verified that pH values were within the range considered ideal for soil (pH of 5 to 7), according to the increase of base saturation levels and wood ash doses, but limestone provided faster results. Initial growth of cowpea was positively influenced by soil correction with use of both correctives. Wood ash and limestone increased soil pH to adequate values and resulted in better initial crop development.

关键词： Vigna unguiculata Solid Waste Disposal Alternative Soil Corrective Soil pH

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CeO_(2)-Nb_(2)O_(5)photocatalysts for degradation of organic pollutants in water

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Rare Metals 2020年第3期39卷 230-240页

作者： Nathália pereira ferraz andre Esteves Nogueira Francielle Candian Firmino Marcos Vanessa Aguiar Machado Rene Rojas Rocca Elisabete Moreira Assaf Yvan Jesus Olortiga Asencios Institute of Marine Science Federal University of Sao PauloSantosSP11030-100Brazil Brazilian Center for Research in Energy and Materials(CNPEM) CampinasSP13083-970Brazil Sao Carlos Institute of Chemistry University of Sao PauloSao CarlosSP13566-590Brazil

The photocatalytic properties of CeO2-Nb2O5 photocatalysts in heterogeneous photocatalysis(under ultraviolet and visible radiation)and in Fenton-like process were *** blue dye(MB)and phenol(Ph)were used as models of pollutant molecules for these reactions,and the photocatalysts were characterized by X-ray diffraction(XRD),diffuse reflectance spectroscopy(DRS),scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDX)and thermally stimulated luminescence(TL).The results indicated that the addition of CeO2(0.3 wt%,1.0 wt%and 2.0 wt%)to Nb2O5 sensitized the resultant materials,increasing light absorption in the visible ***,there is a suitable formulation of CeO2-Nb2O5 photocatalysts to improve each photocatalytic *** heterogeneous photocatalysis,the addition of small CeO2 quantities to Nb2O5 was enough to improve the photocatalytic activity of CeO2-Nb2O5 photocatalysts(The best composition reported was CeO20.3 wt%.).The effectiveness of the catalyst was explained by the decrease in the number of trapping and luminescence centers in the conduction band of the material after the addition of CeO2 to Nb2O5,but a large amount of CeO2 decreased the number of trapping,luminescent and active centers to a large ***,in a Fenton-like process,the addition of CeO2 to Nb2O5 was favorable in all the proportions studied.(The best composition was 2.0 wt%CeO2.)In this case,the effectiveness was explained by the influence of the adsorption process(adsorption-triggered process),and the interactions between H2 O2 and Ce3+of the CeO2 in each photocatalyst thus formed surface peroxide species O22-,which induced the removal of the organic molecules under visible light.

关键词： Advanced oxidation process Photocatalysts Nb_(2)O_(5) CeO_(2) Phenol Methylene blue

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Expression Variability of Carbohydrates at the Cell Wall Surface of Aspergillus Species and in Vitro Susceptibility to Amphotericin B, Voriconazole and Itraconazole

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Journal of Life Sciences 2014年第4期8卷 358-363页

作者： andré ferraz Goiana Leal Eduardo Isidoro Cameiro Beltrao Almir Goncalves Wanderley Rejane pereira Neves Department of Mycology Federal University of Pernambuco Recife PE Brazil Department of Biochemistry Federal University of Pernambuco Recife PE Brazil Keizo Asami Immunopathology Laboratory (LIKA) Federal University of Pernambuco Recife PE Brazil Department of Physiology and Pharmacology Federal University of Pernambuco Recife PE Brazil

This study evaluated the expression of N-acetyl-D-glucosamine, L-fucose, D-galactose and glucose/mannose on the cell wall surface of Aspergillus species using lectins and the in vitro antifungal activity of AMB （amphotericin B）, VOR （voriconazole） and ITC （itraconazole）. Con A （Concanavalin A）, WGA （wheat germ agglutinin）, UEA-I （Ulex europeus agglutinin I） and PNA （peanut agglutinin）, all conjugated with horseradish peroxidase, were used. For the susceptibility tests, sterilized fiat-bottomed 96-well microtitre plates were used and the procedures were followed of the Clinical and Laboratory Standard Institute. The inoculum was added to the wells with the tested drugs and the plates were incubated at 25 ℃ for 48 h before reading the results to determine the MIC （minimal inhibitory concentration） of AMB, VOR and ITC. All Aspergillus strains showed low MIC for AMB （0.031-1 μg/mL） and ITC （0.031-0.25μg/mL）. However, the isolates were less susceptible to VOR, for which the MIC ranged from 4 to 16 μg/mL. The results of this study indicate that the expression of N-acetyl-D-glucosamine and glucose/mannose on the cell wall surface of the Aspergillus species evaluated showed greater stability of expression in the fungal growth both in vitro and in parasitism.

关键词： Cell wall carbohydrates lectins Aspergillus antifungal activity.

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