A5043467554- Nanoparticles: synthesis and applications
- Polymer Nanocomposites and Properties
- Mercury impact and mitigation studies
- SARS-CoV-2 detection and testing
- Phytochemicals and Antioxidant Activities
- Nuts composition and effects
- Skin Protection and Aging
- Nanocomposite Films for Food Packaging
- Biosensors and Analytical Detection
- Advanced biosensing and bioanalysis techniques
- Hydrogels: synthesis, properties, applications
- Curcumin's Biomedical Applications
- Polymer composites and self-healing
- Microplastics and Plastic Pollution
- Biocrusts and Microbial Ecology
- Nutrition, Genetics, and Disease
- Biological Stains and Phytochemicals
- Protein Hydrolysis and Bioactive Peptides
- Essential Oils and Antimicrobial Activity
- Bee Products Chemical Analysis
- Barrier Structure and Function Studies
- Coconut Research and Applications
- Agricultural and Food Sciences
- Biochemical effects in animals
- Plant-Derived Bioactive Compounds
Universidade Federal do Rio de Janeiro
2022-2025
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
2022
Universidade do Estado do Rio de Janeiro
2017-2020
Mosteiro da Batalha
2020
Background: Paullinia cupana Kunth, popularly known as guarana, a native Amazonian shrub cultivated by the Sateré-Mawé ethnic group, has been used in traditional medicine for various purposes, including stimulant and therapeutic actions, due to its chemical composition, which is rich bioactive compounds. This study explored reductive potential of guarana with nanobiotechnology aimed synthesize silver nanoparticles (AgNPs) using aqueous extract leaves collected during dry rainy seasons,...
In this work, a novel crosslinked poly(styrene-co-divinylbenzene) (PS-DVB) microspheres containing polystyrene (PS) brushes were produced by combining surface-initiated atom transfer radical polymerization (SI-ATRP) and functionalization with trimercaptotriazine (TMT) groups. Two different surface initiators used: bromoacetyl chloromethyl groups, followed TMT groups via nucleophilic substitution. The resins characterized Fourier-transform infrared spectroscopy (FTIR), thermogravimetric...
A new transmission route of SARS-CoV-2 through food was recently considered by the World Health Organization (WHO), and, given pandemic scenario, search for fast, sensitive, and low-cost methods is necessary. Biosensors have become a viable alternative large-scale testing because they overcome limitations standard techniques. Herein, we investigated ability gold spherical nanoparticles (AuNPs) functionalized with oligonucleotides to detect demonstrated their potential be used as plasmonic...
A stable moisturizing cosmetic emulsion was developed from babassu nut oil and high concentrations of sunscreens. Babassu chosen because within the laboratory time-scale, this vegetable showed physicochemical properties (relative density, acidity index, refracted index) a good ratio between lauric myristic fatty acids. The presence these saturated acids can confer specific activities to emulsion, such as antiviral, bactericidal, anti-inflammatory activity. prepared even after centrifugation...
In this work, novel nanocomposite films based on babassu coconut mesocarp and zinc oxide nanoparticles (ZnO NPs), synthesized by a green route, were produced for application as food packaging films. The prepared using the casting method containing different contents of ZnO NPs (0 wt%, 0.1 0.5 1.0 wt%). characterized Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), instrumental color analysis,...
Oil-in-water photoprotective nanoemulsions (NEs) were developed using Babassu (BBS) lipophilic extract, nonionic surfactants, and low concentrations of organic sunscreens by ultrasonic processing. BBS extract was chosen due to its suitable physicochemical properties (acidity index, peroxide refraction relative density) predominance saturated fatty acids, identified gas chromatography-mass spectrometry (GC-MS), which promote biological activities high oxidative stability. NEs characterized...
Abstract Ketoconazole (KTZ) was incorporated in waterborne poly(urethane-urea)s dispersions (WPUU), aiming at the production of films for drug sustained release. Dispersions based on poly(ethylene glycol- block -propylene glycol) (PEG- b -PPG) (four monomers with different contents PEG hydrophilic segments), poly(propylene glycol), isophorone diisocyanate, dime-thylolpropionic acid and hydrazine were produced characterized by apparent viscosity average particle size (APS). Cast films-drug...
The objective of this study was to use oily extracts the species Orbignya phalerata Martius (Babassu) from three ecological regions in Maranhão state, Brazil: Forest (BBF), Coast (BBC) and Lowlands (BBL) develop cosmetic formulations.Formulations with 10 wt% Babassu were characterised regarding their stability for 30 days (separation phases after centrifugation, pH, density, viscosity droplets size distribution) evaluation efficacy vivo by cutaneous biometry.Results indicated that...