379 results match your criteria: "University of ABC (UFABC)[Affiliation]"

Degradation of Rhodamine B dye using the mesoporous material KIT-6/TiO photocatalyst obtained by in situ anchoring method.

Environ Sci Pollut Res Int

January 2025

Department of Chemistry, Laboratory of Catalysis, Environment and Materials, State University of Rio Grande Do Norte, 59610-210, Mossoró, Rio Grande Do Norte, Brazil.

In this study, a novel synthesis approach was employed to create the KIT-6/TiO photocatalyst with different ratios of Si/Ti. The results of the X-ray diffraction revealed that incorporating TiO with the anatase phase maintained the mesoporous structure of KIT-6 (Korean Institute of Technology 6). The scanning electron microscope and transmission electron microscope images exhibited unobstructed mesopores, validating their anchoring within the internal structure of the support.

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Obesity, recognized as a metabolic disease and a global epidemic, calls for novel pharmacological interventions. Menthol, an organic compound, has shown promise in increasing energy expenditure and has been proposed as a potential anti-obesity drug. While preclinical studies have demonstrated menthol's preventive effect on body mass gain, none have investigated its efficacy in treating obesity.

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Nitric oxide (NO) is a multifunctional signaling molecule in plants, playing key roles in germination, microbial symbiosis, and nodule formation. However, its instability requires innovative approaches, such as using nanoencapsulated NO donors, to prolong its effects. This study evaluated the impact of treating soybean () seeds with the NO donor S-nitrosoglutathione (GSNO), encapsulated in polymeric nanoparticles, on the germination, nodulation, and plant growth.

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The scarcity of water resources and their pollution are vital to modern civilization. Thus, adsorptive membranes are promising candidates to be applied in the filtration systems to improve the water quality. In summary, this study investigated the effect of chitosan (CS) in the morphological, chemical, and physical aspects of PLA-based membranes incorporating chitosan obtained by electrospinning process, their adsorption behavior in multielement aqueous systems containing Cr, Cu, Zn, Mn , Ni, and Cd in pH 4, and the possible removal mechanism on the composite electrospun membrane's surface.

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Unveiling the potential of pullulan in enhancing ketoprofen release from PHBV filaments.

Int J Biol Macromol

January 2025

Chemical Engineering Department, Engineering School of Lorena, University of São Paulo, Lorena, São Paulo, Brazil. Electronic address:

In this study, sustainable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and pullulan (PUL)/PHBV filaments were prepared with ketoprofen for scaffold preparation. The research aimed evaluate the influence of pullulan in the filament properties, such as thermal, morphological, and biological behavior. Hansen parameters demonstrated the difference in the miscibility of the polymers and drug in the blend.

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This study aims to use superparamagnetic iron oxide nanoparticles (SPIONs), specifically magnetite (FeO), to deliver deflazacort (DFZ) and ibuprofen (IBU) to Duchenne muscular dystrophy-affected (DMD) mouse muscles using an external magnetic field. The SPIONs are synthesized by the co-precipitation method, and their surfaces are functionalized with L-cysteine to anchor the drugs, considering that the cysteine on the surface of the SPIONs in the solid state dimerizes to form the cystine molecule, creating the FeO-(Cys)-DFZ and FeO-(Cys)-IBU systems for tests. The FeO nanoparticles (NPs) were characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), dynamic light scattering (DLS), and magnetic measurements.

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Exploring the Electronic and Mechanical Properties of TPDH Nanotube: Insights from Ab Initio and Classical Molecular Dynamics Simulations.

ACS Omega

December 2024

Electronic Structure and Atomistic Dynamics Interdisciplinary Group (GEEDAI), Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Avenida dos Estados 5001, 09210-580 Santo Andre, Sao Paulo, Brazil.

Tetra-Penta-Deca-Hexa graphene (TPDH) is a new two-dimensional (2D) carbon allotrope with attractive electronic and mechanical properties. It is composed of tetragonal, pentagonal, decagonal and hexagonal carbon rings. When TPDH graphene is sliced into quasi-one-dimensional (1D) structures such as nanoribbons, it exhibits a range of behaviors, from semimetallic to semiconducting.

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Background/objectives: Antipsychotic medicines are used to treat several psychological disorders and some symptoms caused by dementia and schizophrenia. Haloperidol (Hal) is a typical antipsychotic usually used to treat psychosis; however, its use causes motor or extrapyramidal symptoms (EPS) such as catalepsy. Hal blocks the function of presynaptic D2 receptors on cholinergic interneurons, leading to the release of acetylcholine (ACh), which is hydrolyzed by the enzyme acetylcholinesterase (AChE).

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Study of the synergistic properties of copaiba oil co-electrospun with poly(L-co-D,L lactic acid) and natural rubber latex for application in bioactive wound dressings.

Int J Biol Macromol

December 2024

Post-Graduation Program in Materials Sciences (PPGCM), Federal University of São Carlos (UFSCar), 18052-780, Brazil; Laboratory of Biomaterials, Faculty of Medical Sciences and Health (FCMS), Pontifical Catholic University of São Paulo (PUC-SP), 18030-070, Brazil; Mechanical Engineering Faculty (FEM), State University of Campinas (UNICAMP), 13083-970, Brazil; Post-Graduation Program of Biomaterials and Regenerative Medicine (PPGBMR), Surgery Department, (PUC-SP), 18030-070, Brazil.

Wound healing is a complex process involving a sequence of factors that can be disrupted, negatively impacting the quality of life for patients and overburdening healthcare systems. Advanced dressings obtained by electrospinning are highlighted by the optimization of this process, allowing air exchange and protection against microorganisms. Aiming to develop bioactive dressings, this study investigated the physicochemical, mechanical, microbiological, and in vitro biological properties of membranes containing 25 %, 50 %, 75 %, and 90 % copaiba oil (CO) co-electrospun with poly(L-co-D,L-lactic acid) (PLDLA) and natural rubber latex (NR).

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Temporal binding refers to the subjective shortening of time between a cause and its effect compared with two unrelated events. The effect has been extensively explored over the past two decades and manifests across a robust range of paradigms, reflecting two distinct expressions of binding: (1) the subjective shortening of elapsed time between cause and effect and (2) the subjective attraction of cause and effect to each other. However, whether and how these binding expressions are related is still largely unknown.

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Aims: The term ovarian carcinoma (OC) refers to a heterogeneous collection of five distinct diseases known as histotypes. While histotype-specific treatment is still a clinical challenge in OC, well-characterized models are required for testing new therapeutic strategies. We employed OncoTherad® (MRB-CFI-1), an interferon (IFN-γ)-stimulating nano-immunotherapy mediated by Toll-like receptors (TLR) 2/4, in association or not with Erythropoietin (EPO) in a chemically-induced ovarian cancer model.

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Article Synopsis
  • Photoelectrochemical (PEC) water splitting is a promising method for producing green hydrogen, with a strong focus on efficient photoanode design.
  • Key factors like morphology optimization and defect engineering are essential for improving the technology.
  • The article discusses semiconductor properties, examines hematite as a model for analyzing how structure and chemical changes impact performance, and highlights future challenges and directions in PEC device development.
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Carbons with Brønsted acidic sites and iron oxide modifications were prepared through hydrothermal carbonization and glycerol pyrolysis in the presence of sulfuric acid, magnetite, and iron(III) nitrate. The solids were tested as catalysts in converting fructose to 5-hydroxymethylfurfural (5-HMF). Characterization techniques revealed a uniform presence of 4.

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Graphene oxide (GO) undergoes multiple transformations when introduced to biological and environmental media. GO surface favors the adsorption of biomolecules through different types of interaction mechanisms, modulating the biological effects of the material. In this study, we investigated the interaction of GO with tannic acid (TA) and its consequences for GO toxicity.

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Animals combine colour change and behavioural choices to enhance concealment and adapt to changes in habitat in time and space. However, non-native and invasive habitat-forming plants and seaweeds can change the landscape, challenging animals to remain camouflaged, especially when the colour of the new habitat differs from the native backgrounds. The chameleon prawn (Hippolyte varians) exhibits remarkable colour variation and effective camouflage against different native seaweeds in shallow tidepools.

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Enhanced Thermodynamic Stability of Delithiated Nano-LiCoO by Lanthanum Doping.

J Phys Chem C Nanomater Interfaces

October 2024

Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States.

The dynamic environment within lithium-ion batteries induces significant changes in local thermodynamic functions, hampering the accurate prediction of the stability of the cathodes during cycling. While delithiation primarily affects the surface properties of the cathode structure, there is a lack of fundamental understanding concerning the evolution of interfacial energies with varying stoichiometry. Here, we used microcalorimetry to quantify the thermodynamic changes between the stoichiometric and partially delithiated nano-LiCoO states for the first time.

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Herein, basel on novel data gathered by citizens scientists and specialists, we contribute to the improvement of scientific knowledge and conservation of the Near Threatened in order to: 1) test for the first time the phylogenetic position and a species delimitation of through a molecular approach; 2) describe a larger sample of its advertisement call to properly encompass the species intraspecific variation; 3) describe for the first time the release call; and 4) provide novel insights on the species conservation status. Our 16S tree confidently grouped with , , and . The average sequence divergence between and its congeners ranged from 2.

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A comprehensive LC-MS study examined the venom components of the solitary scoliid wasp . Online mass fingerprinting showed that crude venom contains 25 small molecules (amino acids, biogenic amines, and nucleosides/nucleotides) and 45 peptides with MW 400-2700. The small molecules were identified by elemental composition analysis, and peptide sequences were determined by ESI-MS/MS and MALDI-TOF/TOF MS analyses.

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This study investigates the presence of potentially toxic elements (PTEs) in lettuce ( L.) grown in urban gardens in a highly industrialized city in Brazil and evaluates the effectiveness of different washing methods in reducing contamination. Ten elements (arsenic (As), barium (Ba), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), vanadium (V), and zinc (Zn)) were analyzed for their concentration, and a health risk assessment was performed.

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Evaluating the Antimicrobial Efficacy of a Designed Synthetic peptide against Pathogenic Bacteria.

J Microbiol Biotechnol

November 2024

Protein Purification Laboratory and its Biological Functions; Faculty of Pharmaceutical Sciences, Food and Nutrition; Faculty of Pharmacy, Food and Nutrition; Federal University of Mato Grosso do Sul (UFMS), Campo Grande, Mato Grosso do Sul, Brazil.

Recent research has focused on discovering peptides that effectively target multidrug-resistant bacteria while leaving healthy cells unharmed. In this work, we describe the antimicrobial properties of RK8, a peptide composed of eight amino acid residues. Its activity was tested against multidrug-resistant Gram-negative and Gram-positive bacteria.

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Bayesian spatio-temporal modeling to assess the effect of land-use changes on the incidence of Cutaneous Leishmaniasis in the Brazilian Amazon.

Sci Total Environ

November 2024

São Paulo State University (UNESP), Institute for Theoretical Physics (IFT), R. Dr. Bento Teobaldo Ferraz, 271, Bloco II, Barra-Funda, São Paulo, SP CEP 01140-070, Brazil.

Article Synopsis
  • Cutaneous Leishmaniasis (CL) is a significant neglected tropical disease primarily found in the Brazilian Amazon, where diverse Leishmania parasites and vectors thrive.
  • The study analyzes how different land-use changes, such as deforestation and agriculture, influence CL incidence from 2001 to 2017, revealing that deforestation, particularly related to livestock farming, significantly raises the risk of the disease.
  • The results highlight the need for targeted public health policies and land-use planning to mitigate CL transmission risks and promote healthier environments.
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Independent Vector Analysis for Feature Extraction in Motor Imagery Classification.

Sensors (Basel)

August 2024

Department of Computer Science and Electrical Engineering, University of Maryland, Baltimore County (UMBC), Baltimore, MD 21250, USA.

Independent vector analysis (IVA) can be viewed as an extension of independent component analysis (ICA) to multiple datasets. It exploits the statistical dependency between different datasets through mutual information. In the context of motor imagery classification based on electroencephalogram (EEG) signals for the brain-computer interface (BCI), several methods have been proposed to extract features efficiently, mainly based on common spatial patterns, filter banks, and deep learning.

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Maternal immune response during pregnancy and neurodevelopmental outcomes: A longitudinal approach.

Brain Behav Immun Health

October 2024

Instituto e Departamento de Psiquiatria, Faculdade de Medicina FMUSP, LIM/23, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.

Article Synopsis
  • The study investigates how maternal immune responses during pregnancy, particularly through immune biomarkers, affect the neurodevelopment of children in their first two years of life.
  • It examines maternal psychosocial stress and childhood trauma, measuring various inflammatory markers at two gestational stages in 160 women.
  • Results indicate that specific immune profiles in late pregnancy can predict children's neurodevelopmental progress, while no direct correlation was found between maternal stress and immune markers, suggesting a complex interaction between stress and immune response in predicting neurodevelopment.
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Comparison review of image classification techniques for early diagnosis of diabetic retinopathy.

Biomed Phys Eng Express

September 2024

Center of Engineering, Modeling and Applied Social Science, Federal University of ABC (UFABC), Santo André, Brazil.

Diabetic retinopathy (DR) is one of the leading causes of vision loss in adults and is one of the detrimental side effects of the mass prevalence of Diabetes Mellitus (DM). It is crucial to have an efficient screening method for early diagnosis of DR to prevent vision loss. This paper compares and analyzes the various Machine Learning (ML) techniques, from traditional ML to advanced Deep Learning models.

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The arrangement of dual-species biofilms of and can be modified by the medium: effect of Voriconazole.

Biofouling

October 2024

Instituto de Pesquisa & Desenvolvimento - IP&D, Universidade do Vale do Paraíba - UNIVAP, São José dos Campos, Brazil.

Both and have been isolated from different types of infections over the years. They have the ability to form communities of microorganisms known as biofilms. It has been demonstrated that the medium employed in studies may affect the biofilm development.

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