A5046313080- Polysaccharides Composition and Applications
- Agricultural and Food Sciences
- Botanical Research and Applications
- Animal Nutrition and Physiology
- biodegradable polymer synthesis and properties
- Carbon and Quantum Dots Applications
- Hydrogels: synthesis, properties, applications
- Helminth infection and control
- Advanced Drug Delivery Systems
- Adsorption and biosorption for pollutant removal
- Microencapsulation and Drying Processes
- Surfactants and Colloidal Systems
- Coccidia and coccidiosis research
- Polymer Nanocomposites and Properties
- Chemistry Education and Research
- Ginkgo biloba and Cashew Applications
- Proteins in Food Systems
- Chemistry and Chemical Engineering
- Phytochemistry Medicinal Plant Applications
- Nanocluster Synthesis and Applications
- Nanocomposite Films for Food Packaging
- Geography and Environmental Studies
- Quantum Dots Synthesis And Properties
- Advanced biosensing and bioanalysis techniques
- Essential Oils and Antimicrobial Activity
Universidade Estadual do Ceará
2016-2025
Natura (Brazil)
2024-2025
Universidade Federal do Rio Grande do Sul
2004-2023
Fundação Instituto de Pesca do Estado do Rio de Janeiro
2022
Universidade Federal do Ceará
2010-2017
Universidade de Fortaleza
2016
Universidade Estadual de Roraima
2016
Águas de Portugal (Portugal)
2016
Nanogels based on chitosan and cashew gum were prepared loaded with Lippia sidoides oil. Several parameters such as concentration relative oil content in the matrix had their influence nanogel properties investigated. characterized regarding morphologies, particle size distributions, zeta potential, Fourier transform infrared spectroscopy essential contents. The release profile was investigated by UV/vis its efficacy determined through bioassays. Results showed that samples designed using...
Abstract Blends of polypropylene (PP) and thermoplastic elastomers (TPE), namely SBS (styrene‐butadiene‐styrene) SEBS (styrene‐ethylene/1‐butene‐styrene) block copolymers, were prepared to evaluate the effectiveness TPE type as an impact modifier for PP influence concentration elastomer on polymer properties. Polypropylene homopolymer (PP‐H) ethylene–propylene random copolymer (PP‐R) evaluated matrix. Results showed that TPEs had a nucleating effect caused crystallization temperature...
Cashew gum (GC) is a polysaccharide whose structural modification has the potential to extend its applications on varied fields such as formation of self-organized nanoparticulated systems. In this work, 23 factorial design was carried out, aiming at evaluation influence reactional parameters an acetylation reaction final properties cashew gum. The effects temperature, time and amount acetylating agent yield degree GC were investigated. Data obtained revealed that aforementioned influenced...
Chitosan (CH) and angico gum (AG) nanoparticles were loaded with essential oil, Lippia sidoides (Ls), being characterized according to their composition, size distribution, Ls:polymer ratio, thermal stability in vitro vivo controlled release. Nanoparticles prepared using Ls:AG ratios of 1:2 1:20 had loading values 3.3 7.7%, encapsulation efficiencies the range 16.0 77.8%. Particle sizes 10-60 nm distributions independent Ls content, for different ratios. Infrared spectroscopy revealed...
Chitosan (CT) is a polysaccharide with the ability to adsorb metals on its surface. In this work, CT-based nanoparticles (NPs) are produced by complex formation gum arabic (GA) increase their adsorbent potential for removal of heavy in aqueous medium. Adsorption efficiency evaluated as function NP composition and concentration. NPs sized from 250 375 nm at zeta up -25 mV, suggesting stability metals. particular, CTGA56 CTGA80 adsorbed substantially higher amount copper ions than pure CT....
This study presents the pequi (Caryocar coriaceum) as a new biomass source for carbon dots synthesis. The almond, usually discarded, was used precursor in one-step hydrothermal green synthesis of dots. Pequi-based (PQ-CDs) exhibited an estimated height around 8 nm, with hydroxyl, carbonyl, and amino functional groups confirmed by FTIR, bright blue emission, quantum yield 17.9%. PQ-CDs were employed fluorescent sensors Fe3+ ions, based on quenching fluorescence interaction ions. sensor...
ABSTRACT Seriguela gum is a barely explored polysaccharide, whose carboxymethylation reaction can expand its applications for water treatment by the increase of negative charges in chain. This work aimed to produce carboxymethyl derivatives, under different condition, apply as flocculation aid treatment. The derivatives were characterized titration, Fourier transform infrared spectroscopy, nuclear magnetic resonance, and gel permeation chromatography techniques. condition parameters, sodium...
Esferas de alginato (ALG) reticuladas com cálcio e revestidas goma do cajueiro (GC) foram preparadas dopadas óleo essencial Croton zehntneri Pax et Hoffm (Cz), visando a seu emprego como larvicida para combate ao vetor da dengue. As esferas caracterizadas estruturalmente por espectroscopia infravermelho, análise térmica, microscopia eletrônica varredura em relação aos seus parâmetros transporte líquido, dopagem, embebição (Q) cinética liberação in vitro vivo. Os resultados revelaram que as...
Abstract Nanoparticles (NPs) have been used as carriers and protective coatings of labile substances with applications in pharmacy, medicine, agriculture. This work focused on the development an entrapment process for protection a natural larvicide extracted from Moringa oleifera (MO) seeds cashew gum (CG) NPs wall material. CG–MO were characterized regard to their size, morphology, kinetic release, thermal properties, Stegomya aegypti larvae mortality. The result showed that presented...
The present study aimed to evaluate the effect of nanoemulsions using combined synthetic anthelmintics, thiabendazole (TBZ), levamisole (LEV), and ivermectin (IVM), with carvacryl acetate (CA) against Haemonchus contortus, also tested presence absence alginate (ALG). anthelmintic CA/TBZ nanoemulsion was evaluated in egg hatch test (EHT). effects CA/IVM CA/LEV were larval development (LDT). emulsions CA/TBZ/ALG showed a multimodal profile, most particles on nanometric scale. encapsulation...
Alginate-chitosan (ALG-CHI) microspheres obtained by polyelectrolyte complexation are pH-sensitive, biocompatible and adhesive, excellent candidates for the delivery of drugs, proteins peptides in human body.A wide variety methods production these polymeric complexes has been provided.The water-in-oil emulsion is a complex method, but generally enhances control particle size distribution microspheres, extremely necessary obtaining repeatable controlled release behavior.In this work, novel...
Anacardic Acid (AA) and Cardol (CD) are the main constituents of cashew nut shell liquid, which presented several biological activities. In this study, a 23 factorial experimental design was employed in order to evaluate influence reaction conditions nanoencapsulation AA CD using Chitosan (CH), Alginate (ALG) Arabic Gum matrices. The nanoparticles (NPs) with higher stability encapsulation efficiency were those ALG as an outer coating lower content surfactant. NPs nanometric size 90%...
Eucalyptus citriodora oil has a well-known antimicrobial activity, however, its volatility limits therapeutic applicability. Oil-in-water chitosan-based nanoemulsions have been prepared using high-energy method in variable conditions order to produce stable formulation with an effective action. Physical-chemical characterizations and activity were performed. Results showed that the stability over 60 days encapsulation efficiency higher than 90% ones surfactant content. An optimal was...
Abstract Background Achondroplasia is the most common bone dysplasia associated with disproportionate short stature, and other comorbidities, such as foramen magnum stenosis, thoracolumbar kyphosis, lumbar hyperlordosis, genu varum spinal compression. Additionally, patients affected this condition have higher frequency of sleep disorders, ear infections, hearing loss slowed development milestones. Considering these clinical features, we aimed to summarize regional experts’ recommendations...
Abstract BACKGROUND: Hydrogels of alginate (ALG) with partially carboxymethylated chitosan (CMCHI) have been produced for drug delivery, based on the interactions between negative groups and an ionic crosslinker. In present work, CMCHI was used to evaluate influence amino that are positively charged at pH = 4 6 ALG–CMCHI core–shell hydrogel preparation. An ANOVA statistics tool effect composition, chemical nature morphology swelling properties hydrogels in simulated gastric fluid (SGF)...
Abstract This work aimed to evaluate the in vitro anthelmintic effect of carvone nanoemulsions on Haemonchus contortus . Three R-carvone were prepared: uncoated homogenized a sonicator (UNAlg-son) and an ultrahomogenizer (UNAlg-ultra) sodium alginate-coated (CNAlg-ultra). The physicochemical characterizations carried out. activity was evaluated using egg hatch test (EHT), larval development (LDT) adult worm motility (AWMT). Changes cuticle induced H. by scanning electron microscopy (SEM)....