Polyacrylamide
Mostrando 1-12 de 7058 artigos, teses e dissertações.
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1. Ultrafine quartz flocculation: Part I. System characterization and variables selection
Abstract A characterization study was performed to verify the more relevant physicochemical properties for quartz flocculation with polyacrylamide, as well as to define which variables should be further investigated regarding this flocculation system. Polyacrylamide was evaluated through molecular weight, radius of gyration, and infrared spectrometry. A natu
REM - International Engineering Journal. Publicado em: 2022
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2. Polyacrylamides in reverse cationic iron ore flotation: bench scale study
Abstract A bench scale study was carried out to investigate the influence of polyacrylamides as co-depressant in a blend with starch depressant on the reverse cationic iron ore flotation. The results indicated that the use of polyacrylamides as dual function polymer should be an alternative to improve the flotation process. These polymers act as a depressant
REM, Int. Eng. J.. Publicado em: 2021-09
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3. New Strategy for Streptavidin Detection Using AuNRs/PAAm Hydrogel Composites
Localized surface plasmon resonance (LSPR) is a collective oscillation of free electrons induced by the incident light in nanometric surfaces of conductive materials. Gold nanorods (AuNRs) have been studied for plasmonic devices due to their anisotropic properties. Herein, we report the construction of a specific biosensor using polyacrylamide (PAAm) as the
J. Braz. Chem. Soc.. Publicado em: 2020-09
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4. Free-living diazotrophs drive castor bean nitrogen input in tropical semiarid soils
RESUMO: Existem poucos estudos sobre a diversidade microbiana em solos de mamona no ambiente semiárido tropical. Os produtos de mamona têm sido amplamente utilizados em todo o mundo e justificam a importância comercial da ricinocultura no semiárido nordestino brasileiro. Como não há qualquer tipo de fertilização, ou manutenção de resíduos da cult
Cienc. Rural. Publicado em: 02/12/2019
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5. Transferrina como marcador de maturação pulmonar em cordeiros nascidos a termo ou prematuros
RESUMO O objetivo do estudo foi procurar proteínas de fase aguda que possam indicar sinais de maturação no neonato prematuro, por meio da quantificação sérica delas. Identificou-se a imunoglobulina A, a ceruloplasmina, a haptoglobina, a glicoproteína ácida, a transferrina, a albumina e as imunoglobulinas G de cadeias leve e pesada, pela comparação
Arq. Bras. Med. Vet. Zootec.. Publicado em: 10/10/2019
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6. Fotodegradação de hidrogel de poliacrilamida na presença de substâncias químicas para o uso na agricultura
RESUMO Utilizado na agricultura como condicionante do solo, a poliacrilamida, constituinte básico do hidrogel, tem a característica de absorver, por processo físico, água e a estocar para as plantas conforme sua necessidade hídrica. Entretanto, a poliacrilamida sofre degradação de sua cadeia, devido à ação da radiação ultravioleta e de sais prese
Matéria (Rio J.). Publicado em: 16/09/2019
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7. Evaluation of the embryotoxicity in zebrafish (Danio rerio) of the flocculant and coagulant compounds used for water remediation
Resumo Objetivo: O carreamento decorrente das atividades de mineração atinge corpos d'água, causando contaminação da água e acidificação por metais tóxicos. Como conseqüência, a depleção de oxigênio ocorre, com o desaparecimento de certos organismos bênticos, perdas na biomassa do fitoplâncton e do zooplâncton, e mortalidade de peixes. Rem
Acta Limnol. Bras.. Publicado em: 25/04/2019
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8. Antithrombotic Activity of Milk Protein Hydrolysates by Lactic Acid Bacteria Isolated from Commercial Fermented Milks
ABSTRACT In the last decade, thrombosis has been one of the pathologies with high incidence creating great concern in Health Institutes all around the world. Considering this, the aim of this research was to determine the antithrombotic activity of peptides released during lactic fermentation. Reconstituted skim milk powder was fermented by Lactobacillus cas
Braz. arch. biol. technol.. Publicado em: 29/11/2018
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9. Rhizosphere Bacterial Composition of the Sugar Beet Using SDS-PAGE Methodology
ABSTRACT The rhizosphere zone has been defined as the volume of soil directly influenced by the presence of living plant roots or soil compartment influenced by the root. During the growing season of 2014, the rhizobacteria of 23 sugar beet plants sampled from 12 sites in the west and north west of Iran were inventoried. Using a cultivation-dependent approac
Braz. arch. biol. technol.. Publicado em: 14/06/2018
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10. Characterization of biochemical and functional properties of water-soluble tempe flour
Abstract Characteristics of water-soluble flours from soy (SF), soy tempe (STF), and germinated-soy tempe (GTF) were compared with those of commercial soy protein isolate (SPI). Defatted flour of soy, soy tempe, and germinated soy tempe were extracted in alkaline water (pH 9) and freeze dried to produce water-soluble flours. Protein contents of SF, STF, and
Food Sci. Technol. Publicado em: 11/06/2018
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11. Ultrasound-assisted synthesis of polyacrylamide-grafted sodium alginate and its application in dye removal
Abstract A polymeric adsorbent based on sodium alginate (SAG) grafted with polyacrylamide (PAM) (SAG- g-PAM) was synthesized using an ultrasound-assisted method. The addition polymerization was carried out with ammonium persulfate as the initiator, at different acrylamide (AM) concentrations. The SAG-g-PAM copolymers were evaluated by FTIR and 13C NMR spect
Polímeros. Publicado em: 21/05/2018
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12. HIDROGÉIS NANOCOMPÓSITOS DE POLISSACARÍDEO COM ZEÓLITA: AVALIAÇÃO DO PROCESSO DE ADSORÇÃO DO PESTICIDA PARAQUAT
In this work, nanocomposites formed from the natural polymer carboxymethylcellulose in combination with the polyacrylamide polymer and zeolite were obtained and characterized in relation to pesticide sorption capability. Hydrogels are three-dimensional network with large capacity of water or biological fluid adsorption. They have biocompatibility, biodegrada
Quím. Nova. Publicado em: 2018-04