Paper And Cellulose
Mostrando 1-12 de 171 artigos, teses e dissertações.
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1. USE OF PAPER SPRAY-MASS SPECTROMETRY TO DETERMINE THE CHEMICAL PROFILE OF RIPE BANANA PEEL FLOUR AND EVALUATION OF ITS PHYSICOCHEMICAL AND ANTIOXIDANT PROPERTIES
In this work, the peels of ripe banana (Musa sp.), variety “Prata”, were used to prepare a flour, which was evaluated for its physicochemical characteristics and antioxidant activity. The characterization of its chemical profile was performed by a fast and simple method: paper spray-mass spectrometry. This flour had high carbohydrate content and total di
Quím. Nova. Publicado em: 2020-05
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2. MODELAGEM DA EXPANSÃO DO REFLORESTAMENTO COM EUCALIPTO E EFEITOS NA ESTRUTURA DA PAISAGEM
Resumo Neste artigo trabalhamos uma metodologia combinada de sensoriamento remoto, modelagem ambiental e ecologia da paisagem para análise dos impactos da expansão do reflorestamento com eucalipto na estrutura da paisagem. O uso combinado dessas técnicas possibilitou a simulação de cenários futuros, utilizando-os não apenas como uma ferramenta de aná
Mercator (Fortaleza). Publicado em: 09/12/2019
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3. INVENTÁRIO DO SAPATEIRO DAMIÃO SIMÕES: UM ESTUDO FÍSICO-QUÍMICO DO DOCUMENTO MAIS ANTIGO DO ESTADO DE SÃO PAULO
The oldest manuscript from the Arquivo Público do Estado de São Paulo dating back to the XVI century, which was laminated some decades ago, was analyzed by Raman and FTIR spectroscopies. A book from the XVIII century and Japanese papers were also investigated for comparison purpose. Raman microscopy is a well-known technique, which offers a non-destructive
Quím. Nova. Publicado em: 05/12/2019
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4. Chlorine and Fluorine Determination in Eye-Pencil: Development of an Eco-Friendly Sample Preparation Method for Ion Chromatography Analysis
In this paper, a feasible method was proposed for the chlorine and fluorine determination in eye-pencil samples using ion chromatography (IC). The microwave-induced combustion (MIC) was used to digest up to 200 mg of a sample, with 50 mg of microcrystalline cellulose as a combustion aid and only water for analytes absorption. Cl and F recoveries were 105 ±
J. Braz. Chem. Soc.. Publicado em: 21/10/2019
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5. Atributos químicos de um solo degradado após aplicação de composto orgânico e crescimento de Mabea fistulifera Mart.
Resumo Com a produção de papel e celulose, as indústrias deste setor têm gerado diariamente grandes quantidades de resíduos sólidos e efluentes, constituindo-se em grande preocupação ambiental e econômica. Tendo como objetivo pesquisar possibilidades do uso destes subprodutos de forma sustentável, neste estudo foi testada a eficácia de um composto
Ciênc. Florest.. Publicado em: 30/09/2019
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6. A Study of Chemical Composition and Enzymatic Hydrolysis of Solid Organic Waste from Agrosilvopastoral Systems
Agrosilvopastoral waste, regarding agriculture and agro-industry sectors, is pointed as a promising sustainable raw material for biofuels production, specially concerning exploitation of lignocellulosic organic residues for fermentable sugars and cellulosic ethanol output, being therefore necessary to investigate the potential of these substrates concerning
J. Braz. Chem. Soc.. Publicado em: 16/09/2019
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7. Cloning and expression of an endoglucanase gene from the thermotolerant fungus Aspergillus fumigatus DBiNU-1 in Kluyveromyces lactis
Abstract An intronless endoglucanase from thermotolerant Aspergillus fumigatus DBINU-1 was cloned, characterized and expressed in the yeast Kluyveromyces lactis. The full-length open reading frame of the endoglucanase gene from A. fumigatus DBiNU-1, designated Cel7, was 1383 nucleotides in length and encoded a protein of 460 amino acid residues. The predicte
Braz. J. Microbiol.. Publicado em: 2018-09
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8. Cellulose nanomaterials: size and surface influence on the thermal and rheological behavior
Abstract Cellulose nanocrystals (CNC) and nanofibrils (CNF) were obtained by acid hydrolyzis and mechanical treatment, respectively, of cellulosic fibers from paper. Additionally, surface modification was performed for CNC by neutralization (NaOH) and oxidation (TEMPO). The thermal stability, surface properties and rheological behavior of these nanomaterial
Polímeros. Publicado em: 21/05/2018
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9. BIOCONVERSION OF CELLULOSE INTO HYDROGEN, BIOGAS AND ORGANIC ACIDS USING MICROBIAL CONSORTIUM FROM A PULP AND PAPER MILL WASTEWATER TREATMENT PLANT
This study evaluated the potential of a microbial consortium collected from a pulp and paper mill wastewater treatment plant (WWTP) for converting cellulose to hydrogen, biogas and organic acids. Fermentation tests were conducted in batch reactors fed with different concentrations of cellulose as substrate: (C1) 2.0 g L -1; (C2) 5.0 g L -1 and (C3) 10.0 g L
Quím. Nova. Publicado em: 2018-02
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10. Paper-Based Microfluidics Immunoassay for Detection of Canine Distemper Virus
ABSTRACT Paper-based devices present low-cost and are versatile, making them very attractive for clinical analysis. To manufacture those devices wax patterns are printed on paper surface and upon heating the wax permeates through the entire thickness of the paper, creating hydrophobic barriers that delimit test areas. Antibodies produced in rabbits against c
Braz. arch. biol. technol.. Publicado em: 08/01/2018
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11. THE FUNGAL ABILITY FOR BIOBLEACHING/BIOPULPING/BIOREMEDIATION OF LIGNIN-LIKE COMPOUNDS OF AGRO-INDUSTRIAL RAW MATERIAL
Lignin is present in plant cell secondary wall, associated to carbohydrates preventing their efficient hydrolysis, and cellulose pulp manufacture basically consists in breaking down the middle lamella of plant cells, individualizing fibers such as cellulose from the other biopolymers. Different levels of lignocellulose are found in plant residues and they ca
Quím. Nova. Publicado em: 2017-09
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12. Cellulose Nanostructures Obtained from Waste Paper Industry: A Comparison of Acid and Mechanical Isolation Methods
The paper industry primary waste is usually deposited in landfills or incinerated. This material has a high content of lignocellulosic components, which could be converted to cellulose nanostructures (CNS). This study aimed to compare compositional (Fourier transform infrared spectroscopy), thermal (thermogravimetric analysis), morphological (scanning electr
Mat. Res.. Publicado em: 29/06/2017