Cuso4
Mostrando 1-12 de 134 artigos, teses e dissertações.
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1. Rapid and Inexpensive Colorimetric Detection of Total Serum Protein Using Microzone Plates Wax-Printed on Polyester Films
This report describes a rapid and inexpensive colorimetric method based on biuret assay for total serum protein analysis using wax printed microzone plates and a desktop scanner. The colorimetric assay was performed in 96-microzone plates fabricated on polyester films through a wax printing protocol. The image scanning mode and the concentration of the biure
J. Braz. Chem. Soc.. Publicado em: 2021-02
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2. Biosorption Potential of the Aspergillus sp. and Insights into Secondary Metabolism in the Presence of Copper and Lead
The fungus Aspergillus sp. was isolated from copper mining rejects and cultured in a liquid culture medium (potato dextrose, PD) enriched with CuSO4.5H2O and Pb(NO3)2 in different concentrations. By flame atomic absorption spectrometry (FAAS) it was observed that fungus absorbed 86% of both copper and lead, with initial concentrations of 100, 500 and 1000 mg
J. Braz. Chem. Soc.. Publicado em: 2020-03
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3. Bioaccumulation, Growth and Photosynthetic Response of a New Found in Bulgaria Invasive Species Lemna minuta and L. valdiviana to Heavy Metal Pollution
RESUMO: Metais pesados podem ser encontrados no meio ambiente como ingredientes naturais ou de práticas agrícolas, industriais e químicas. Este estudo foi conduzido com o objetivo de traçar o potencial das plantas aquáticas L. minuta e L. valdiviana para a bioacumulação de Cu, Cd e Pb a partir de água contaminada com baixos níveis desses elementos.
Planta daninha. Publicado em: 04/11/2019
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4. Electrodeposition of Co-rich Cu-Co Alloys from Sodium Tartrate Baths Using Direct (DC) and Single Pulsed Current (SPC)
Cu-Co alloys were electrodeposited on steel substrates from alkaline sodium tartrate electrolyte using direct and single pulsed current (DC and SPC, respectively). The electrodeposition bath was composed by 0.02 mol L−1 of CuSO4.5H2O, 0.10 mol L−1 of CoSO4.7H2O and 0.50 mol L−1 of Na2C4H4O6.4H2O. Using both kind of deposition processes, it was verified
Mat. Res.. Publicado em: 06/05/2019
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5. Coroamento Manual Versus Papelão na Restauração Florestal: Custos e Efeito sobre o Desenvolvimento das Mudas
RESUMO: Gramíneas invasoras são um dos maiores obstáculos a serem superados em plantios de restauração. Assim, desenvolver técnicas eficientes e de baixo custo para superar esse obstáculo é um desafio para a ciência e a prática da restauração ecológica. O objetivo deste trabalho foi avaliar o efeito do coroamento com papelão sobre o crescimento
Planta daninha. Publicado em: 29/10/2018
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6. Use of Cardboard Disks for Crowning Seedlings in Reforestation
ABSTRACT The present study aimed to evaluate the effect of chemopreventive or water-repellent substances on the durability of cardboard disks used to crown forest tree species. The experiment presented a randomized block design with four repetitions and four sampling times (63, 133, 260 and 365 days) and was installed in Seropedica, RJ, in an area with Uroc
Floresta Ambient.. Publicado em: 26/07/2018
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7. Catalytic hydrogen generation from NaBH 4 /H 2 O system: effects of catalyst and promoters
Abstract A hydrogen generation system based on NaBH4 hydrolysis is affected by the nature of the catalyst and catalyst promoter. Various catalyst promoters such as Al2O3 nanoparticles, Al2O3 particles, ZrO2 sand, SiO2, MMT clay, CNT and zeolite are compared with respect to hydrogen generation (HG) and hydrogen generation rate (HGR). The highest HG and HGR ar
Braz. J. Chem. Eng.. Publicado em: 2018-01
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8. Dry Biomass of the Amazonian Macrophyte Paspalun Repens for Evaluation as Adsorbent Material of Heavy Metals Zn and Cu
The present work aims at the preliminary evaluation of the Paspalun repens macrophyte dry biomass adsorbent material of zinc (Zn) and copper (Cu) metals from water. The diversity of Species is due to the extensive aquatic environment where it is inserted. The Paspalun repens species comes from the Buiuçu lake located in the region of Parintins-Amazonas- Bra
Mat. Res.. Publicado em: 06/11/2017
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9. Effect of Cupric Salts (Cu (NO3)2, CuSO4, Cu(CH3COO)2) on Cu2(OH)PO4 Morphology for Photocatalytic Degradation of 2,4-dichlorophenol under Near-infrared light irradiation
Cu2(OH)PO4 microstructures were synthesized by the hydrothermal method using three different types cupric salts (Cu (NO3)2, CuSO4, Cu(CH3COO)2) as raw materials. The X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-visible-NIR absorption spectra were used to characterize the as-obtained products. The different anions (SO42-, CH3COO-, NO3-)
Mat. Res.. Publicado em: 26/01/2017
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10. Optimization of culture medium for production of melanin by Auricularia auricula
Abstract Melanin is a natural high molecular weight pigment with the huge application value and development potential in food industry. In the present study, medium composition for melanin production by fungus Auricularia auricula was investigated. Wheat bran extract, l-tyrosine, and CuSO4 were determined to optimize medium composition by response surface me
Food Sci. Technol. Publicado em: 19/01/2017
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11. Copper and Manganese Cations Alter Secondary Metabolism in the Fungus Penicillium brasilianum
The fungus Penicillium brasilianum LaBioMMi 136 was isolated as an endophyte from Melia azedarach and has shown to be a prominent producer of great diversity of secondary metabolites, although it does not express some biosynthetic routes to other natural compounds found in Penicillium genera. The present study aimed at the diversification of P. brasilianum s
J. Braz. Chem. Soc.. Publicado em: 2016-08
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12. Avaliação do uso de diferentes agentes de contraste em ressonância magnética como fontes falsas em planejamentos de braquiterapia guiados por imagem
Resumo Objetivo: Encontrar um material de contraste que possa ser utilizado como fonte falsa em imagens de ressonância magnética. Materiais e Métodos: Foram feitas imagens de ressonância magnética de cateteres preenchidos com seis meios de contraste conhecidos: água, glicose 50%, soro fisiológico, óleo de oliva, glicerina, solução aquosa de sulfa
Radiol Bras. Publicado em: 2016-06