Functionalized Products
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. BIOTECHNOLOGICAL APPLICATION OF SURFACE MODIFIED CERIUM OXIDE NANOPARTICLES
ABSTRACT Re-engineering of chemical materials at the nanoscale level that employ modification and improvement in their physical and chemical properties has been constantly pursued for application in biomedical and biotechnology industries. Moreover, immobilization of catalysts on these bio/chemically modified nanomaterials improved the performance of enzymes
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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2. PRODUCTION, CHARACTERIZATION AND USAGE OF A NOVEL DISULFONIC ACID-FUNCTIONALIZED IONIC LIQUID AS A HIGHLY EFFICIENT AND DUAL-FUNCTIONAL CATALYST FOR THE SYNTHESIS OF 1,8-DIOXO-9,10-DIARYL-DECAHYDROACRIDINES
We have produced a novel ionic liquid {N,N,N',N'-tetramethylethylene-diaminium-N,N'-disulfonic acid trifluoroacetate ([TMEDSA][TFA]2)}, and identified it by analysis of 1H NMR, 13C NMR, 19F NMR, mass, TG (thermogravimetry) and DSC (differential scanning calorimetry) data. Then, we have applied [TMEDSA][TFA]2 as a dual-functional catalyst for the production o
Quím. Nova. Publicado em: 2018-07
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3. UTILITY OF FUNCTIONALIZED AGAROSE NANOPARTICLES IN HYDROLYZING LACTOSE IN BATCH REACTORS FOR DAIRY INDUSTRIES
The present study investigates the synthesis of agarose nanoparticles (ANPs) and its surface modification by galactose for the immobilization of β-galactosidase. Galactose modified ANPs retained 91% enzyme activity upon immobilization. Optimum pH (4.5) and temperature (50 ºC) remains unchanged after immobilization. However, immobilized enzyme retained grea
Quím. Nova. Publicado em: 2018-04
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4. Degrading Pesticides with Waste Product: Imidazole-Functionalized Rice Husk Catalyst for Organophosphate Detoxification
Rice husk (RH) is one the largest agricultural waste products worldwide, and rice is one of the crops that use the most pesticides. Among these, organophosphates have been of increasing concern due to their high toxicity. Herein, we report the functionalization of RH with imidazole groups (RHIMZ) to obtain sustainable catalysts from waste for organophosphate
J. Braz. Chem. Soc.. Publicado em: 2017-09
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5. Efeito da ativação química nas propriedades de superfície de xisto retortado
A pyrolyzed oil shale by-product known as retorted shale was functionalized with HCl, HNO3, H2SO4, H3PO4, HNO3/H2SO4 (3:1), Fenton's reagent, (NH4)2S2O7, NaOH, and KMnO4 using either ultrasound (Route 1) or reflux (Route 2). The products obtained were evaluated in terms of cation exchange capacity (CEC). Structural characterization was performed using X-ray
Quím. Nova. Publicado em: 2016-05
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6. SYNTHESIS AND BIOLOGICAL EVALUATION OF SPIRO[INDOLINE-3,4’-PYRANO[2,3-C:6,5-C’]DIPYRAZOL]- 2-ONES IN THE PRESENCE OF SBA-Pr-SO3H AS A NANOCATALYST
Sulfonic acid functionalized SBA-15 nanoporous material (SBA-Pr-SO3H) with a large pore size of 6 nm, a high surface area, high selectivity, and excellent chemical and thermal stability was applied as an efficient heterogeneous nanoporous acid catalyst in the reaction of isatin with pyrazolones under mild reaction conditions. A novel class of symmetrical spi
Quím. Nova. Publicado em: 2015-11
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7. Glicólise do poli(3-hidroxibutirato) por via enzimática
Poly(3-hydroxybutyrate), PHB, is a polymer with broad potential applications because of its biodegradability and biocompatibility. However, its high crystallinity is a limiting factor for many applications. To overcome this drawback, one strategy currently employed involves the reduction of the molecular weight of PHB with the concomitant formation of end-fu
Quím. Nova. Publicado em: 2014-06
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8. Bioconversão e degradação da venlafaxina em seu metabólito ativo / Bioconversion and degradation of venlafaxine to its active metabolite
A venlafaxina, (1-[2-dimetilamino)-1-(4-metoxifenil)etil]ciclohexanol), é um fármaco antidepressivo de segunda geração. É um dos mais potentes inibidores da recaptação de serotonina e noradrenalina, e o seu efeito terapêutico é atribuído a esta atividade. A venlafaxina é biotransformada no fígado pelas enzimas CYP2D6, CYP2C19 e CYP2C9 em O-desmet
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/03/2010
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9. Synthesis and characterization of sililca coated nanoparticles functionalized with anime groups / Síntese e caracterização de nanopartículas de maguemita recobertas com sílica funcionalizada com grupos amina
Magnetic nanoparticles coated with several kinds of materials have been the focus of intense research due to their potential applications in biomedicine. This type of material contains a magnetic core that is involved by a shell of different composition. The coating of magnetic nanoparticles with amino-functionalized silica is particularly important because
Publicado em: 2008
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10. Synthesis and characterization of sililca coated nanoparticles functionalized with anime groups / Síntese e caracterização de nanopartículas de maguemita recobertas com sílica funcionalizada com grupos amina
Magnetic nanoparticles coated with several kinds of materials have been the focus of intense research due to their potential applications in biomedicine. This type of material contains a magnetic core that is involved by a shell of different composition. The coating of magnetic nanoparticles with amino-functionalized silica is particularly important because
Publicado em: 2008
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11. Reações de oxidação de derivados de cis-octalinas promovidas por trinitrato de tálio (TTN)
The reaction of ten cis-octalins and cis-octalones with thallium trinitrate (TTN) leads to different products, depending mainly on the substitution pattern of the substrate. Functionalized cis-hydrindanes were obtained from the reaction of 1,2,3,4,4a,5,8,8a-octahydro-4a-methylnaphthalene and of 1,2,3,4,4a,5,8,8a-octahydro-4a,7-dimethylnaphthalene with TTN in
Química Nova. Publicado em: 2008
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12. Graphite Functionalized in Conditions of Friedel-Crafts Reaction mediated by Radiation of Microwave: New Material for Construction of Electrodes of Carbon Paste / Grafite funcionalizada em condições de Friedel-Crafts mediada por radiação de microondas: novo material para construção de eletrodos de pasta de carbono
Modification and/or functionalization of eletrodic materials have been investigated in order to improve the application of chemically modified electrode (CME) regards on their sensitivity, selectivity and reactivity comparing with unmodified substrate. However, the stability and reproducibility of these CME are one of the most important goals to achieve main
Publicado em: 2007