A5048030312- Natural Fiber Reinforced Composites
- Biofuel production and bioconversion
- Biodiesel Production and Applications
- Nanocomposite Films for Food Packaging
- Advanced Cellulose Research Studies
- Lignin and Wood Chemistry
- Agricultural and Food Sciences
- Nanoparticles: synthesis and applications
- Enzyme-mediated dye degradation
- Thermochemical Biomass Conversion Processes
- Electrospun Nanofibers in Biomedical Applications
- Fermentation and Sensory Analysis
- Wood Treatment and Properties
- Anaerobic Digestion and Biogas Production
- Polyoxometalates: Synthesis and Applications
- Material Properties and Processing
- Chemical Synthesis and Reactions
- Polymer composites and self-healing
- Algal biology and biofuel production
- Biocrusts and Microbial Ecology
- Biochemical and biochemical processes
- Coffee research and impacts
- Tea Polyphenols and Effects
- Marine Biology and Environmental Chemistry
- Cassava research and cyanide
Universidade Federal do Paraná
2010-2022
Universidad de Guadalajara
2019-2020
Institute of Rural Management Anand
2015
Pontifícia Universidade Católica do Paraná
2014
Instituto Politécnico Nacional
2012
Sponge-gourds, the fruit of Luffa cylindrica, are widely used throughout world. Despite that, there is lack scientific data concerning thermal, mechanical, and chemical properties these fibers. Sponge-gourds biocomposites a novel use fibers, but better understanding their surface characteristics necessary to maximize potential use. In this work, different treatments were conducted on fibers with aqueous solutions NaOH 2%, or methacrylamide (1–3%) at distinct treatment times. L. cylindrica...
Increasing environmental concerns in recent years focused greater attention on the development of biodegradable materials. This paper presents preparation cassava starch based composites incorporating fibers from Brazilian green coconuts. These were prepared with different amounts coir by thermal molding using glycerol as plasticizer for starch. The matrix and given treatment. Both untreated treated matrices their characterized tensile properties, while water uptake, swelling immersion...
The aim of this study was to evaluate the yeast diversity and physicochemical characteristics spontaneous coffee bean fermentation conducted in coffee-producing region Cerrado Mineiro, Brazil. During 48 h fermentation, population increased from 6.60 7.89 log CFU·g−1, with concomitant pulp sugar consumption organic acids production (mainly lactic (3.35 g·L−1) acetic (1.27 acids). According ITS-rRNA gene sequencing, mainly represented by Saccharomyces sp., followed Torulaspora delbrueckii,...
Increasing environmental concern along with the drive to find substitutes for synthetic fibers and value added applications low cost renewable plant have led development of composites based on biomaterials. One drawbacks encountered in such exercise is lack adhesion between incorporated polymeric matrices. Such drawback can be reduced by appropriate treatment fibers. This paper describes chemical treatments used sponge gourd (Luffa cylindrica) Brazil prepare their polyester resin. Production...
Abstract This work studies the possibility of reusing flexible postconsumed polyurethane foams modified by grafting with polystyrene as a sorbent material for mitigation oil spills. Different were evaluated via crude sorption and retention experiments, density, morphological analyses. The best performance chemically under different conditions (initiator concentration, styrene volume, reaction time) in system initiated oxi‐reduction Ce(IV) from an amoniacal ceric nitrate solution. A...
Abstract This study reports the first phytochemical and biological characterization in treatment of adrenocortical carcinoma cells (H295R) extracts from Nidularium procerum , an endemic bromeliad Atlantic Forest vulnerable to extinction. Extracts dry leaves obtained vitro -grown plants were recovered by different extraction methods, viz ., hexanoic, ethanolic, hot cold aqueous. Chromatography–based metabolite profiling chemical reaction methods revealed presence flavonoids, steroids, lipids,...
In this study, a strategy was adopted to enhance the use of ramie fibers as raw material for isolation cellulose nanofibers (CNFs). Ramie pulp produced by alkaline organosolv followed bleaching. CNFs were mechanical defibrillation, and films fabricated via casting. Effects number passes in grinding on physical properties CNF comprehensively studied. Potential proved fabricating homogeneous with average thickness 8.72 nm, which led dense non-porous networks, crystallinity index 76-78%....
Lignin is an abundant biopolymer, as well cellulose and hemicellulose. Thus, this work aimed at isolating characterizing the lignin from Eucalyptus spp. Sawdust—a lignocellulosic waste generated in large amounts sawmills—to evaluate its antioxidant capacity. A biorefinery perspective was utilized: biomass fractionated using a sequential acid-alkaline treatment to recover hemicellulosic carbohydrates, preserving cellulose-rich solid fraction lignin. The physicochemical characterization of...
Increasing search for new materials with high premium on eco-friendliness, trend is emerging in development such as composites, which are well established a wide variety of applications. With growing interest and importance renewable bioresources has led to more stress the use locally available materials. This paper presents preliminary results preparation characterization composites based Brazilian coconut fibers starches cassava corn. The raw were characterized their morphology, chemical...
The demand for new energy sources is growing and awakening interest in the use of forest residues. Charcoal was prepared at carbonization temperatures 500 ºC, 600 °C 700 order to evaluate potential Pinus sp needles energy. anatomical chemical characteristics charcoal produced were also evaluated. found have ash content 2.32% gross calorific value 20.30 MJ/kg. increased by 45%, reaching 29.64 MJ/kg, after carried out ºC. This higher than that made from eucalyptus (19.25 MJ/kg) even coconut...
No presente estudo, objetivou-se comparar a resistência da linha de cola painéis Pinus taeda colados lateralmente com diferentes adesivos industriais. Foram analisados três tipos (poli(vinil) acetato (PVAc), emulsão polimérica isocianato (EPI) e poliuretano (PU)) em duas orientações (radial tangencial) avaliados após os condicionamentos ensaio (a seco úmido). preparados 360 corpos prova para determinação ao cisalhamento dos e, estes foram testados máquina universal EMIC. A foi inferior nas...