A5074734061- Conducting polymers and applications
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Nanocomposite Films for Food Packaging
- Nanoparticles: synthesis and applications
- Ginkgo biloba and Cashew Applications
- Advanced Sensor and Energy Harvesting Materials
- Organic Electronics and Photovoltaics
- Electrochemical Analysis and Applications
- Advanced biosensing and bioanalysis techniques
- biodegradable polymer synthesis and properties
- Bone Tissue Engineering Materials
- Molecular Junctions and Nanostructures
- Agricultural and Food Sciences
- Microplastics and Plastic Pollution
- Polysaccharides Composition and Applications
- Clay minerals and soil interactions
- Insect Resistance and Genetics
- Antimicrobial Peptides and Activities
- Protein Hydrolysis and Bioactive Peptides
- Polydiacetylene-based materials and applications
- Therapeutic Uses of Natural Elements
- Electrospun Nanofibers in Biomedical Applications
- Collagen: Extraction and Characterization
- Silk-based biomaterials and applications
Universidade Federal do Piauí
2014-2024
Universidade Federal de Campina Grande
2023
Universidade do Estado do Rio de Janeiro
2023
Materia (United States)
2016
National Center for Genetic Engineering and Biotechnology
2015
Universidade Estadual Paulista (Unesp)
2007
Universidade Federal de São Carlos
2002-2003
Universidade de São Paulo
2002
The present study describes the development of a green synthesis silver nanoparticles reduced and stabilized by exuded gum from Anacardium occidentale L. evaluates in vitro their antibacterial cytotoxic activities. Characterization cashew gum-based (AgNPs) was carried out based on UV-Vis spectroscopy, transmission electron microscopy dynamic light scattering analysis which revealed that synthesized were spherical shape, measuring about 4 nm size with uniform dispersal. AgNPs presented...
Type I collagen is an abundant natural polymer with several applications in medicine as matrix to regenerate tissues. Silver nanoparticles important nanotechnology material many utilities some areas such medicine, biology and chemistry. The present study focused on the synthesis of silver (AgNPs) stabilized type (AgNPcol) build a nanomaterial biological utility. Three formulations AgNPcol were physicochemical characterized, antibacterial activity vitro cell viability assays analyzed. was...
Natural gums have been traditionally applied in cosmetics and the food industry, mainly as emulsification agents. Due to their biodegradability excellent mechanical properties, new technological applications proposed involving use with conventional polymers forming blends composites. In this study, we take advantage of polyelectrolyte character exhibited by natural gum Chichá (Sterculia striata), extracted Northeastern region Brazil, produce electroactive nanocomposites. The nanocomposites...
Amburana cearensis tree is used in various applications, from artisanal to pharmaceutical use. However, the gum extracted its exudate has not yet been investigated. This study aimed physicochemical and structural characterization of Gum (AcG) by elemental, rheological, thermal analyses, X-ray diffraction (XRD), high-Performance Liquid Chromatography (HPLC), Gel Permeation (GPC), Infrared Spectroscopy (FTIR), UV-Vis spectroscopy nuclear magnetic resonance (NMR). Additionally, a hemolytic...
ELECTROACTIVE NANOCOMPOSITES MADE OF POLY(O-METHOXYANILINE) AND NATURAL POLYSACCHARIDES.In this work we take advantage of the polyelectrolyte character some Brazilian native gums to fabricate electrically conductive, nanostructured films.The Sterculia urens, (caraia), striata (chicha) or Anadenanthera macrocarpa Benth were assembled in conjunction with poly(o-methoxyaniline) (POMA) form layered films using layer-bylayer (LbL) technique.All LbL displayed a well-defined electroactivity, as...
The search for natural, biocompatible and degradable materials amenable to be used in biomedical/analytical applications has attracted attention, either from the environmental or medical point of view. Examples are polysaccharides extracted natural gums, which have found food pharmaceutical industries as stabilizers thickening agent. In a previous paper, however, it was shown that Brazilian gum, chicha (Sterculia striata), is suitable application building block nanostructured film...
We take advantage of polyelectrolyte feature exhibited by natural cashew gum (Anacardium occidentale L.) (CG), found in northeast Brazil, to employ it the formation electroactive nanocomposites prepared layer-by-layer (LbL) technique. used polyaniline unmodified (PANI) or modified with phosphonic acid (PA), PANI-PA as cationic polyelectrolyte. On other hand, CG polyvinyl sulfonic (PVS) acids were anionic polyelectrolytes. The films PANI intercalated PVS alternately resulting four different...
The antimicrobial peptide dermaseptin 01 (DS 01), from the skin secretion of Phyllomedusa hypochondrialis frogs, was immobilized in nanostructured layered films conjunction with nickel tetrasulfonated phthalocyanines (NiTsPc), widely used electronic devices, using layer-by-layer technique. were as a biosensor to detect presence dopamine (DA), neurotransmitter associated diseases such Alzheimer's and Parkinson's, detection limits order 10 −6 mol L −1 . use DS LbL film generated selectivity DA...
Poly(p-phenylene) (PPP), polypyrrole (PPY), and poly(p-phenylene-pyrrole) (PPP-PPY) films were electrochemically synthesized in acetronitrile by cyclic voltammetry. For comparison purposes, the characterized voltammetry a monomer-free solution, their optical responses also obtained UV-VIS range of energy after varying applied potentials. The absorbance spectra PPP-PPY film exhibited bands typically seen homopolymers, PPP PPY films, but better defined, intense, related to reversible color...