Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Cláudio Airoldi"'
Autor:
Karina Cenciani, Sueli dos Santos Freitas, Silvana Auxiliadora Missola Critter, Cláudio Airoldi
Publikováno v:
Scientia Agricola, Vol 65, Iss 6, Pp 674-680 (2008)
Bacteria and fungi are the most active decomposers of organic materials in soil. They directly affect plant nutrient availability, and chemical and physical properties of soils. This investigation aimed at quantifying the effect of several organic ma
Externí odkaz:
https://doaj.org/article/ac4f6c9be41f4b90b17c8197f9edd427
Publikováno v:
In Thermochimica Acta 1999 328(1):241-246
Publikováno v:
Eclética Química, Vol 32, Iss 4, Pp 19-26 (2018)
Amostras de esmectitas oriundas do estado do Pará, região amazônica, Brasil, foram usadas em processo de pilarização no presente estudo. As matrizes pilarizadas e natural foram caracterizadas usando DRX e analise textural usando isotermas de ads
Externí odkaz:
https://doaj.org/article/756d9a35173047c9878e020ca106e549
Autor:
Roosevelt D. S. Bezerra, Márcia M. F. Silva, Alan I. S. Morais, Josy A. Osajima, Maria R. M. C. Santos, Claudio Airoldi, Edson C. Silva Filho
Publikováno v:
Materials, Vol 7, Iss 12, Pp 7907-7924 (2014)
Crystalline cellulose chemically modified through a reaction with sodium trimetaphosphate (STMP) in an acidic or basic condition yielded Cel-P4 and Cel-P10. These phosphated solids were characterized by elemental analysis, X-ray diffraction (XRD), in
Externí odkaz:
https://doaj.org/article/c4c9654126964f1bbde182c50b3e5583
Autor:
Edson Cavalcanti Silva Filho, Luiz Sousa Santos Júnior, Marcia Maria Fernandes Silva, Maria Gardênnia Fonseca, Sirlane Aparecida Abreu Santana, Claudio Airoldi
Publikováno v:
Materials Research, Vol 16, Iss 1, Pp 79-84 (2013)
Cellulose was first modified with thionyl chloride, followed by reaction with 2-aminomethylpyridine to yield 6-(2'-aminomethylpyridine)-6-deoxycellulose. The resulting chemically-immobilized surface was characterized by elemental analysis, FTIR, 13C
Externí odkaz:
https://doaj.org/article/2abb83bad19a455e9d123fa5daf2cd25
Autor:
Camila F. N. Silva, Fernando M. de Souza, Jéssica P. Santos, Ana Paula B. Dias, Ana Paula R. Santana, Angélica M. Lazarin, Rosana L. Sernaglia, Elza I. S. Andreotti, Claudio Airoldi
Publikováno v:
Química Nova, Vol 36, Iss 8, Pp 1170-1175 (2013)
In this study, the adsorption isotherm of copper (II) on a calcium phosphate host intercalated with 4-aminobenzoic acid in an ethanol solution was investigated. This gave a maximum adsorption capacity of 1.74 mmol g-1. The material was incorporated i
Externí odkaz:
https://doaj.org/article/c8f20dabaad844b4939dd026b4d0debc
Autor:
THAIS F. PINTO, CÍCERO W.B. BEZERRA, DOMINGOS S.A. SILVA, EDSON C. DA SILVA FILHO, ADRIANA P. VIEIRA, CLAUDIO AIROLDI, JÚLIO C.P. DE MELO, HILDO A.S. SILVA, SIRLANE A.A. SANTANA
Publikováno v:
Anais da Academia Brasileira de Ciências, Iss 0 (2016)
ABSTRACT The adsorption of Violet Remazol 5R (VR 5) on wood sawdust modified with succinic anhydride (SSA) as a function of contact time, pH, and initial dye concentrations was investigated using a batch technique under ambient conditions. The SSA ob
Externí odkaz:
https://doaj.org/article/f4f82647104b40fd8e94d29afbbe6c6a
Autor:
Karina Cenciani, Sueli dos Santos Freitas, Silvana Auxiliadora Missola Critter, Claudio Airoldi
Publikováno v:
Revista Brasileira de Ciência do Solo, Vol 35, Iss 4, Pp 1167-1178 (2011)
Enzymatic activity is an important property for soil quality evaluation. Two sequences of experiments were carried out in order to evaluate the enzymatic activity in a soil (Rhodic Eutrudox) amended with cattle manure, earthworm casts, or sewage slud
Externí odkaz:
https://doaj.org/article/21f6af0912744e2f8a3b8ac2561556fc
Autor:
ROBSON F. de FARIAS, CLAUDIO AIROLDI
Publikováno v:
Journal of the Serbian Chemical Society, Vol 75, Iss 4, Pp 497-504 (2010)
In this paper, the synthesis and characterization of a GO–hmta compound (GO – graphite oxide; hmta – hexamethylenetetramine) are presented. It is shown that the presence of hmta molecules inside the GO matrix, with very strong interactions, sta
Externí odkaz:
https://doaj.org/article/8996ede210874803acd52edb5f0cebdd
Autor:
Denis Lima Guerra, Claudio Airoldi, Vanda Porpino Lemos, Rômulo Simões Angélica, Rúbia Ribeiro Viana
Publikováno v:
Química Nova, Vol 31, Iss 2, Pp 353-359 (2008)
The aim of this investigation is to study how Zr/Ti-PILC adsorbs metals. The physico-chemical proprieties of Zr/Ti-PILC have been optimized with pillarization processes and Cu(II), Ni(II) and Co(II) adsorption from aqueous solution has been carried o
Externí odkaz:
https://doaj.org/article/8d8a673e924d4f0e96782cc97fcc5301