Luís Alves
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View article: Innovative Approaches to Mitigating Microplastic Pollution in Effluents and Soils
Innovative Approaches to Mitigating Microplastic Pollution in Effluents and Soils Open
Microplastic pollution represents a significant environmental challenge, as microplastics accumulate in effluents and soils, causing serious risks to ecosystems and human health. Efficient removal of these contaminants is essential to miti…
View article: INFECÇÃO MATERNA POR HERPES SIMPLES TIPO 1 COM VENTRICULOMEGALIA E AGENESIA DO CORPO CALOSO FETAL: RELATO DE CASO
INFECÇÃO MATERNA POR HERPES SIMPLES TIPO 1 COM VENTRICULOMEGALIA E AGENESIA DO CORPO CALOSO FETAL: RELATO DE CASO Open
As infecções congênitas constituem um importante desafio para a obstetrícia moderna, em razão de sua associação com alterações neurológicas e repercussões adversas no desenvolvimento fetal. Entre as etiologias do grupo TORCH, o herpes simp…
View article: Comparison between the effects of silver and titanium nanoparticles and their bulk counterparts on Meloidogyne Javanica
Comparison between the effects of silver and titanium nanoparticles and their bulk counterparts on Meloidogyne Javanica Open
View article: Optimizing lignin cationization: Unveiling the impact of reaction conditions through multi-response analysis
Optimizing lignin cationization: Unveiling the impact of reaction conditions through multi-response analysis Open
Lignin, a natural and abundant biopolymer, holds great potential for cosmetic applications. However, its limited solubility and inherently negative charge restrict its use in certain formulations. This is particularly relevant for hair con…
View article: Effect of Chitosan Properties and Dissolution State on Solution Rheology and Film Performance in Triboelectric Nanogenerators
Effect of Chitosan Properties and Dissolution State on Solution Rheology and Film Performance in Triboelectric Nanogenerators Open
Chitosan films with potential application in triboelectric nanogenerators (TENGs) represent a promising approach to replace non-biobased materials in these innovative devices. In the present work, chitosan with varying molecular weights (M…
View article: Grandes modelos de linguagens com APIs
Grandes modelos de linguagens com APIs Open
Este e-book refere-se ao microcurso "Grandes Modelos de Linguagens com Interfaces de Programação de Aplicações (APIs)", que visa suprir a crescente demanda por profissionais capacitados em lidar com os avanços e as aplicações da inteligênc…
View article: Tailored cellulose-based flocculants for microplastics removal: Mechanistic insights, pH influence, and efficiency optimization
Tailored cellulose-based flocculants for microplastics removal: Mechanistic insights, pH influence, and efficiency optimization Open
This study explores the performance of novel cellulose-derived sustainable flocculants in the flocculation of different model microplastics (MPs), including polyethylene (PE), polyethylene terephthalate (PET) and polyvinyl chloride (PVC). …
View article: Unleashing the Potential of Portuguese Agroforestry Biomass: Extraction, Characterization, and Valorization of Biomolecules
Unleashing the Potential of Portuguese Agroforestry Biomass: Extraction, Characterization, and Valorization of Biomolecules Open
In this chapter, we explore the vast potential of Portuguese agroforestry biomass as a sustainable source of valuable biomolecules. Focusing on the extraction, characterization, and valorization of compounds, such as polysaccharides, pheno…
View article: Os processos referenciais à luz da teoria da acessibilidade na edição crítico-genética do conto ‘Os caminhos’ de Moreira Campos
Os processos referenciais à luz da teoria da acessibilidade na edição crítico-genética do conto ‘Os caminhos’ de Moreira Campos Open
Neste trabalho, propomos uma interface teórica entre linguística textual e filologia textual nos termos do que já preconizaram Alves (2016, 2020) e Queiroz (2020). Nosso objetivo é investigar os processos referenciais, à luz da Teoria da A…
View article: Lignin-Furanic Rigid Foams: Enhanced Methylene Blue Removal Capacity, Recyclability, and Flame Retardancy
Lignin-Furanic Rigid Foams: Enhanced Methylene Blue Removal Capacity, Recyclability, and Flame Retardancy Open
Worldwide, populations face issues related to water and energy consumption. Water scarcity has intensified globally, particularly in arid and semiarid regions. Projections indicate that by 2030, global water demand will rise by 50%, leadin…
View article: Customising Sustainable Bio-Based Polyelectrolytes: Introduction of Charged and Hydrophobic Groups in Cellulose
Customising Sustainable Bio-Based Polyelectrolytes: Introduction of Charged and Hydrophobic Groups in Cellulose Open
Cellulose has been widely explored as a sustainable alternative to synthetic polymers in industrial applications, thanks to its advantageous properties. The introduction of chemical modifications on cellulose structure, focusing on cationi…
View article: Insights on Microplastic Contamination from Municipal and Textile Industry Effluents and Their Removal Using a Cellulose-Based Approach
Insights on Microplastic Contamination from Municipal and Textile Industry Effluents and Their Removal Using a Cellulose-Based Approach Open
The rampant use of plastics, with the potential to degrade into insidious microplastics (MPs), poses a significant threat by contaminating aquatic environments. In the present study, we delved into the analysis of effluents from textile in…
View article: Lignin extraction from acacia wood: Crafting deep eutectic solvents with a systematic D-optimal mixture-process experimental design
Lignin extraction from acacia wood: Crafting deep eutectic solvents with a systematic D-optimal mixture-process experimental design Open
Lignin is a complex biopolymer whose efficient extraction from biomass is crucial for various applications. Deep eutectic solvents (DES), particularly natural-origin DES (NADES), have emerged as promising systems for lignin fractionation a…
View article: Enhancing Cellulose and Lignin Fractionation from Acacia Wood: Optimized Parameters Using a Deep Eutectic Solvent System and Solvent Recovery
Enhancing Cellulose and Lignin Fractionation from Acacia Wood: Optimized Parameters Using a Deep Eutectic Solvent System and Solvent Recovery Open
Cellulose and lignin, sourced from biomass, hold potential for innovative bioprocesses and biomaterials. However, traditional fractionation and purification methods often rely on harmful chemicals and high temperatures, making these proces…
View article: Stacking self-gluing cellulose II films: A facile strategy for the formation of novel all-cellulose laminates
Stacking self-gluing cellulose II films: A facile strategy for the formation of novel all-cellulose laminates Open
Cellulose laminates represent a remarkable convergence of natural materials and modern engineering, offering a wide range of versatile applications in sustainable packaging, construction, and advanced materials. In this study, novel all-ce…
View article: Rheology of Suspensions of TEMPO-Oxidised and Cationic Cellulose Nanofibrils—The Effect of Chemical Pre-Treatment
Rheology of Suspensions of TEMPO-Oxidised and Cationic Cellulose Nanofibrils—The Effect of Chemical Pre-Treatment Open
Cellulose nanofibrils (CNFs) are particles with a high aspect ratio. Typically, chemically pre-treated CNFs (containing anionic or cationic charged groups) consist of long fibrils (up to 2 μm) with very low thickness (less than 10 nm). Der…
View article: Synergisms between Surfactants, Polymers, and Alcohols to Improve the Foamability of Mixed Systems
Synergisms between Surfactants, Polymers, and Alcohols to Improve the Foamability of Mixed Systems Open
In order to produce detergents with improved performance and good market acceptability, it is crucial to develop formulations with improved foamability and cleaning performance. The use of a delicate balance of surfactants and additives is…
View article: Rheology of Suspensions of Cellulose Nanofibrils Containing Different Charged Functional Groups
Rheology of Suspensions of Cellulose Nanofibrils Containing Different Charged Functional Groups Open
Cellulose nanofibrils (CNFs) are materials with high aspect ratio. Typically, TEMPO-oxidised, or cationic CNFs consist of long fibrils (up to 2 μm) with very low thickness (less than 10 nm). Derived from their high aspect ratio, CNFs form …
View article: Nanofibrillated cationic cellulose derivatives as flocculants for domestic wastewater treatment
Nanofibrillated cationic cellulose derivatives as flocculants for domestic wastewater treatment Open
View article: Paleoecologia
Paleoecologia Open
View article: Design of cellulose nanofibre-based composites with high barrier properties
Design of cellulose nanofibre-based composites with high barrier properties Open
Gas barrier properties are very relevant in composite materials for applications so diverse such as food packaging, electronics, or old document restoration. In the present work, four different types of cellulose nanofibres (CNFs), two typ…
View article: Eco-Friendly Methods for Extraction and Modification of Cellulose: An Overview
Eco-Friendly Methods for Extraction and Modification of Cellulose: An Overview Open
Cellulose is the most abundant renewable polymer on Earth and can be obtained from several different sources, such as trees, grass, or biomass residues. However, one of the issues is that not all the fractionation processes are eco-friendl…
View article: Anionic bio-flocculants from sugarcane for purification of sucrose: An application of circular bioeconomy
Anionic bio-flocculants from sugarcane for purification of sucrose: An application of circular bioeconomy Open
In sugar production, polyacrylamide-based anionic flocculants are added for juice treatment, the main objective being to remove impurities that affect the quality of the sugar. However, if they remain in the final product, those polymers c…
View article: Perspectives on the Lindman Hypothesis and Cellulose Interactions
Perspectives on the Lindman Hypothesis and Cellulose Interactions Open
In the history of cellulose chemistry, hydrogen bonding has been the predominant explanation when discussing intermolecular interactions between cellulose polymers. This is the general consensus in scholarly textbooks and in many research …
View article: Effect of the dispersion state of minerals on the properties of cellulose nanofiber-based composite films
Effect of the dispersion state of minerals on the properties of cellulose nanofiber-based composite films Open
View article: On Hair Care Physicochemistry: From Structure and Degradation to Novel Biobased Conditioning Agents
On Hair Care Physicochemistry: From Structure and Degradation to Novel Biobased Conditioning Agents Open
Hair is constantly exposed to various adverse external stimuli, such as mechanical or thermal factors, that may cause damage or cause it to lose its shine and smooth appearance. These undesirable effects can be minimized by using hair cond…
View article: Assessment of the Performance of Cationic Cellulose Derivatives as Calcium Carbonate Flocculant for Papermaking
Assessment of the Performance of Cationic Cellulose Derivatives as Calcium Carbonate Flocculant for Papermaking Open
Cationic polyacrylamides (CPAMs) are usually used as filler retention agents in papermaking formulations. However, increasing environmental restrictions and their non-renewable origin have driven research into bio-based alternatives. In th…
View article: Acacia Wood Fractionation Using Deep Eutectic Solvents: Extraction, Recovery, and Characterization of the Different Fractions
Acacia Wood Fractionation Using Deep Eutectic Solvents: Extraction, Recovery, and Characterization of the Different Fractions Open
The selective extraction and recovery of different lignocellulosic molecules of interest from forestry residues is increasing every day not only to satisfy the needs of driving a society toward more sustainable approaches and materials (re…
View article: Extraction and Characterization of Microplastics from Portuguese Industrial Effluents
Extraction and Characterization of Microplastics from Portuguese Industrial Effluents Open
Microplastics (MPs) are contaminants present in the environment. The current study evaluates the contribution of different well-established industrial sectors in Portugal regarding their release of MPs and potential contamination of the aq…
View article: Filmes de Celulose Nanofibrilada com Incorporação de Minerais como Substitutos de Plásticos em Embalagens Alimentares: Potencialidades e Dificuldades
Filmes de Celulose Nanofibrilada com Incorporação de Minerais como Substitutos de Plásticos em Embalagens Alimentares: Potencialidades e Dificuldades Open
Nanofibrillated Cellulose Films with Incorporation of Minerals as Substitutes forPlastics in Food Packaging: Potentialities and Drawbacks.Cellulose nanofibrils (CNF) are nanomaterials with promising properties to be used in food packaging,…