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Hybrid materials based on aluminum tungstophosphate or tungstosilicate as catalysts in anisole acylation
(Elsevier Science, 2008-04)
New hybrid materials were prepared by the immobilization of aluminum tungstophosphate or tungstosilicate in a polymeric blend formed by polyvinyl alcohol and polyethylene glycol by the freeze-thawing method. The salts ...
Synthesis and characterization of aluminum or copper tungstophosphate and tungstosilicate immobilized in a polymeric blend
(Pergamon-Elsevier Science Ltd, 2008-03)
Aluminum or copper tungstophosphates and tungstosilicates were synthesized and immobilized in a polymeric blend formed by polyvinyl alcohol and polyethylene glycol using the freeze-thawing method. The salts retained the ...
Influence of natural polymer derived from starch as a sensory modifier in sunscreen formulations
(2013-03-07)
Background: Nowadays, there has been increased incidence of skin cancer, which is mainly related to increased sun exposure. Although sunscreen products may prevent the appearing of this disease, consumers may not use them ...
Influence of natural polymer derived from starch as a sensory modifier in sunscreen formulations
(2013-03-07)
Background: Nowadays, there has been increased incidence of skin cancer, which is mainly related to increased sun exposure. Although sunscreen products may prevent the appearing of this disease, consumers may not use them ...
2-Methoxynaphthalene acylation using aluminum or copper salts of tungstophosphoric and tungstosilicic acids as catalysts
(Elsevier Science, 2011-09-03)
Aluminum or copper salts of the tungstophosphoric (TPA) and tungstosilicic (TSA) acids were synthesized. They present interesting characteristics as catalysts because they can have Lewis and/or Brønsted acidity. The salts ...
Impedance studies of poly(methylmethacrylate-co-acrylic acid) doped polyaniline films on aluminum alloy
(Elsevier B.V., 2009-07-01)
Films of polyaniline doped with poly(methylmethacrylate-co-acrylic acid) - PAni-PMMA-co-AA - were prepared on AA3104-H19 alloy, an aluminum alloy used in the Brazilian can industry, by immersion of the pre-treated surfaces ...
Patagonian salt marsh soils and oxidizable pedogenic pyrite: solid phases controlling aluminum and iron contents in acidic soil solutions
(Springer, 2018-12)
The sulfidic materials present in salt marshes could be oxidized forming sulfuric acid, increasing the toxic levels of both Al and Fe available to plants. The objectives of this study were: (a) to evaluate the mechanism ...
Processamento e recuperação sustentável e econômica de metal das escórias geradas na produção de alumínio e suas ligas com a eliminação da geração de salt cake
(Universidade Federal de São Paulo, 2022-07-28)
O alumínio sendo o segundo metal mais utilizado no mundo e diferente de outros materiais, possui uma capacidade infinita de reciclagem sem que haja perda de suas características no processo de reaproveitamento. Durante os ...
INHIBITION OF BOVINE BRAIN ACETYLCHOLINESTERASE BY ALUMINUM
(Associação Brasileira de Divulgação Científica (ABRADIC), 1994-11-01)
We report the in vitro inhibitory effect of very low concentrations of aluminum salts (IC50 = 4.1 X 10(-12)M) on bovine brain acetylcholinesterase (AChE). The enzymatic assays were performed using acetylcholine bromide in ...
INHIBITION OF BOVINE BRAIN ACETYLCHOLINESTERASE BY ALUMINUM
(Associação Brasileira de Divulgação Científica (ABRADIC), 1994-11-01)
We report the in vitro inhibitory effect of very low concentrations of aluminum salts (IC50 = 4.1 X 10(-12)M) on bovine brain acetylcholinesterase (AChE). The enzymatic assays were performed using acetylcholine bromide in ...