RSS 1.0Artigos - Física, Química e Biologia - FCT
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Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement
Neto, Roumanos Georges Dib
; Macedo, Wagner Costa ; Fernandes, José Diego ; de Souza, Agda Eunice ; Teixeira, Silvio Rainho ; Rocha, Kleper de Oliveira ; (Revista Materia, 2022) [Artigo]
Manganese oxides were synthesized during 40 min at 140 ºC via Microwave-Assisted Hydrothermal (MAH) method and treated at different temperatures in order to evaluate the phase evolution using structure refinement (Rietveld ... -
Analysis of the effects of curcumin and symbiotic consumption on bones of rats submitted to the use of dexamethasone
; ; ; Constantino, Carlos José Leopoldo; (Life Sciences, 2022) [Artigo]
Aims: Glucocorticoids have adverse side effects that can compromise bone tissue. There is evidence to show that symbiotics and curcumin can prevent bone loss. The aim of this study was to analyze the effects of curcumin ... -
Chemical treatment of sugarcane bagasse and its influence on glyphosate adsorption
Da Penha Bezerra, Williene Faria; Dognani, Guilherme ; De Alencar, Laura Neves ; Parizi, Marcela Prado Silva ; Boina, Rosane Freire ; ; Job, Aldo Eloízo (Revista Materia, 2022) [Artigo]
Due to the production rates of sugarcane, nowadays, the sugarcane bagasse stemming in the sugar and alcohol industry is the agro-industrial waste produced in greater volume throughout in Brazil. In 2019, about 192 million ... -
Immunoassay platform with surface-enhanced resonance Raman scattering for detecting trace levels of SARS-CoV-2 spike protein
Bistaffa, Maria J.; Camacho, Sabrina A. ; Pazin, Wallance M. ; Constantino, Carlos J.L. ; ; Aoki, Pedro H.B. (Talanta, 2022) [Artigo]
The early diagnosis of Coronavirus disease (COVID-19) requires either an accurate detection of genetic material or a sensitive detection of viral proteins. In this work, we designed an immunoassay platform for detecting ... -
Investigation of Ferroelectricity and Piezoelectricity in Polar and Non-polar Polymers
Giacometti, José A.; ; (Brazilian Journal of Physics, 2022) [Artigo]
An overview is presented of experimental investigations during two decades at the Polymer Group Prof. Bernhard Gross in Sao Carlos, Brazil, on the properties of piezoelectric polymers. The paper is focused on innovations ... -
Printed in-plane electrolyte-gated transistor based on zinc oxide
Morais, Rogério; Vieira, Douglas Henrique ; Klem, Maykel Dos Santos ; ; ; ; Alves, Neri (Semiconductor Science and Technology, 2022) [Artigo]
Printed electronics is a reputable research area that aims at simple alternatives of manufacturing low-cost, eco-friendly, and biodegradable electronic devices. Among these devices, electrolyte-gated transistors (EGTs) ... -
Synergetic effect of silver nanoparticles and thiram on lipid bilayers
Martin, Cibely S.; Oliveira, Marcelo J.S. ; Maximino, Mateus D. ; Pazin, Wallance M. ; Constantino, Carlos J.L. (Journal of Molecular Liquids, 2022) [Artigo]
The excessive concentration of nanomaterials and pesticides in industrial products, food, and in the environment can be a risk to human health. Exposure to these materials can occur through inhalation, dermal contact, or ... -
In vivo assessment of antioxidant, antigenotoxic, and antimutagenic effects of bark ethanolic extract from Spondias purpurea L
; ; Cavalcante, Dalita Gomes Silva Moraes; Gomes, Andressa Silva ; ; ; Job, Aldo Eloizo ; (Journal of Toxicology and Environmental Health - Part A: Current Issues, 2022) [Artigo]
Medicinal plants have always been used for therapeutic purposes; however, some plants may contain toxic and mutagenic substances. The aim of this study was to assess the cytotoxic, genotoxic, mutagenic, antioxidant, ... -
Lipid exchanges between dioctadecyldimethylammonium bromide monolayer and vesicles in the subphase
; ; Constantino, Carlos J. L.; Aoki, Pedro H. B. (Journal of Surfactants and Detergents, 2022) [Artigo]
Studies on the interaction of lipid monolayer with bilayer structures, such as vesicles, are relatively scarce in the literature. In order to ascertain whether these structures interact for cationic dioctadecyldimethylammonium ... -
Low-cost supercapacitor based on colloidal graphite
Dos Santos Klem, Maykel; Nogueira, Gabriel Leonardo ; Alves, Neri (Materials Research, 2021) [Artigo]
Here we report the production and characterization of a low-cost supercapacitor with electrodes based on colloidal graphite. We characterized the as-prepared device in terms of cyclic voltammetry (CV), Galvanostatic ... -
Monometallic and heterobimetallic ruthenium (II) and palladium (II) complexes based on a pyridine-hydrazone ligand as bifunctional catalysts for ROMP of norbornene and ethylene polymerization
Gois, Patrik Dione de Santana; ; Masson, Gustavo Henrique Cicero ; ; ; Goi, Beatriz Eleutério ; ; Carvalho-Jr, Valdemiro Pereira de (Applied Organometallic Chemistry, 2022) [Artigo]
The monometallic complex [Pd(L)(PPh3)] (mono-Pd) was synthesized using a potentially tridentate hydrazone (H2L) and used as precursor to prepare a heterobimetallic ruthenium (II)-palladium (II) complex [Cl2(p-cymene)Ru(μ-L)Pd ... -
Increasing the sensitivity of surface-enhanced Raman scattering detection for s-triazine pesticides by taking advantage of interactions with soil humic substances
Rubira, Rafael J. G.; Camacho, Sabrina A. ; Constantino, Carlos J. L. ; (Journal of Raman Spectroscopy, 2022) [Artigo]
Surface-enhanced Raman scattering (SERS) is a technique which has been well explored for detecting contaminating substances, such as pesticides. Of particular interest has been the use of SERS for quantifying trace levels ... -
Nanofibrous membranes for low-concentration CrVIadsorption: Kinetic, thermodynamic and the influence on ZFL cells viability
Dognani, Guilherme; Cabrera, Flávio Camargo ; Cavalcante, Dalita Gomes Silva Morais ; Boina, Rosane Freire ; Job, Aldo Eloízo ; Da Silva Agostini, Deuber Lincon (Materials Research, 2021) [Artigo]
There is a great demand to develop different techniques for the continuous removal, immobilization, and remediation of metallic ions from contaminated water. Human contamination by metallic ions could even occur by ingestion ... -
Nanocomposite materials based on electrochemically synthesized graphene polymers: Molecular architecture strategies for sensor applications
Olean-Oliveira, André; ; Cardoso, Celso Xavier ; Teixeira, Marcos F. S. (Chemosensors, 2021) [Resenha]
The use of graphene and its derivatives in the development of electrochemical sensors has been growing in recent decades. Part of this success is due to the excellent characteristics of such materials, such as good electrical ... -
Sensing atrazine herbicide degradation products through their interactions with humic substances by surface-enhanced raman scattering
; Rubira, Rafael J. G.; ; ; Constantino, Carlos J. L. ; (Chemosensors, 2021) [Artigo]
In this work, we have developed a simple method to carry out the quantitative analysis of deethylhydroxyatrazine (DEHA), the most abundant metabolite of atrazine herbicide (ATZ), based on the surface-enhanced Raman scattering ... -
Ferroelectric behavior of P(VDF-TrFE) copolymer samples
Alves, Neri; ; ; (Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP, 1992) [Trabalho apresentado em evento]
Surface potential measurements are presented for corona charged P(VDF-TrFE) samples in a constant current corona triode. The surface potential curves display three distinct regions, characteristic of ferroelectric polymers. ... -
Water quality monitoring by nanostructured films in a sensing unit system
Cajuela, Kássia Barbosa; Dauer, Paaron Guenka ; Rosa, Miriã Camargo ; ; Giacometti, José Alberto (Desalination and Water Treatment, 2012) [Artigo]
Presented here is a study about the capability of a sensing unit to detect changes in river water quality. In order to determine its accuracy, water quality was monitored at 11 points along the Veado River in Presidente ... -
Efeitos da remobilização por meio de exercício físico sobre a densidade óssea de ratos adultos e idosos
Ozaki, Guilherme Akio Tamura; Koike, Tatiana Emy ; Castoldi, Robson Chacon ; Garçon, André Augusto Baldacin ; Kodama, Fábio Yoshikazu ; Watanabe, Adriana Yukie ; Job, Aldo Eloizo ; Louzada, Mário Jefferson Quirino ; Camargo, Regina Celi Trindade ; Filho, José Carlos Silva Camargo (Motricidade, 2014) [Artigo]
This study aimed to analyze the effects of remobilization by means of physical exercise on bone tissue in rats and elderly adults. A total of 80 male Wistar rats were split into two groups, aged five months to 15 months ... -
Nanoscience and nanotechnology in latin America
; ; ; Constantino, Carlos J.L.; ; ; (Nanotechnology and Microelectronics: Global Diffusion, Economics and Policy, 2010) [Capítulo de livro]
Latin America (LA) can count some strong research centers with a tradition of research excellence in certain disciplines such as medicine and biology, nuclear technology, metallurgy and materials, among others. Latin ... -
Controlled Architectures in LbL Films for Sensing and Biosensing
; Aoki, Pedro H.B.; ; Constantino, Carlos J.L. (Multilayer Thin Films: Sequential Assembly of Nanocomposite Materials: Second Edition, 2012) [Capítulo de livro]