RSS 1.0Artigos - Física - IBILCE
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Synthesis and physicochemical characterization of a novel adsorbent based on yttrium silicate: A potential material for removal of lead and cadmium from aqueous media
Litrenta Medeiros, Vinicius
; ; Rubinho Ratero, Davi ; Silva Paula, Alex ; ; ; ; Nery, José Geraldo (Journal of Environmental Chemical Engineering, 2020) [Artigo]
A new metallosilicate based on yttrium was synthesized and characterized by XRD, FT-IR, 29Si MAS-NMR, and 89Y MAS-NMR. The mixed framework of the material was confirmed by the detection of distinct chemical shift groups ... -
Photoinduced Quantum Tunneling Model Applied to an Organic Molecule
Drigo Filho, E.; Jubilato, K. H.P. ; (Brazilian Journal of Physics, 2020) [Artigo]
The paper proposes a photoinduced quantum tunneling model of electron transfer through four quantum square wells potential to simulate the biological process of photosynthesis in bacteria. The problem is mathematically ... -
Forty years of the description of brown spider venom phospholipases-D
; ; ; ; ; ; ; ; Arni, Raghuvir Krishnaswamy; (Toxins, 2020) [Resenha]
Spiders of the genus Loxosceles, popularly known as Brown spiders, are considered a serious public health issue, especially in regions of hot or temperate climates, such as parts of North and South America. Although the ... -
Exploring Folding Aspects of Monomeric Superoxide Dismutase
Mouro, Paulo R.; Povinelli, Ana P. R. ; Leite, Vitor B. P. ; Chahine, Jorge (Journal of Physical Chemistry B, 2020) [Artigo]
Recent studies have associated the absence of bound metals (Apo protein) and mutations in Cu-Zn Human Superoxide Dismutase (SOD1) with amyotrophic lateral sclerosis (ALS) disease, suggesting mechanisms of SOD1 aggregation. ... -
Grb2 dimer interacts with Coumarin through SH2 domains: A combined experimental and molecular modeling study
Sanches, Karoline; Dias, Raphael Vinicius Rodrigues ; da Silva, Paulo Henrique ; Fossey, Marcelo Andrés ; Caruso, Ícaro Putinhon ; de Souza, Fátima Pereira ; de Oliveira, Leandro Cristante ; de Melo, Fernando Alves (Heliyon, 2019) [Artigo]
Grb2 is an important regulator of normal vs. oncogenic cell signaling transduction. It plays a pivotal role on kinase-mediated signaling transduction by linking Receptor Tyrosine kinases to Ras/MAPK pathway which is known ... -
A comparative pan-genomic analysis of 53 C. pseudotuberculosis strains based on functional domains
; Eberle, Raphael J.; ; Coronado, Mônika A. (Journal of Biomolecular Structure and Dynamics, 2020) [Artigo]
Corynebacterium pseudotuberculosis is a pathogenic bacterium with great veterinary and economic importance. It is classified into two biovars: ovis, nitrate-negative, that causes lymphadenitis in small ruminants and equi, ... -
Excited states for hydrogen ion molecule confined by a prolate spheroidal boxes: variational approach
de Oliveira Batael, Hugo; Drigo Filho, Elso (Theoretical Chemistry Accounts, 2020) [Artigo]
The energy eigenvalues for confined H2+ molecule are computed by using the variational method. The approach proposed here uses a trial molecular function for the ground state composed of a linear combination of atomic ... -
Humic extracts from hydrochar and Amazonian Anthrosol: Molecular features and metal binding properties using EEM-PARAFAC and 2D FTIR correlation analyses
Soares da Silva, Leila; Constantino, Isabela Carreira ; Bento, Lucas Raimundo ; ; Bisinoti, Márcia Cristina ; Boscolo, Maurício ; ; ; ; et al. (Chemosphere, 2020) [Artigo]
Organic matter plays many roles in the soil ecosystem. One property of the substance concerns the metal complexation and interaction with organic contaminants. In this sense, the humic substances (HS), a heterogeneous ... -
Comparing activity, toxicity and model membrane interactions of Jelleine-I and Trp/Arg analogs: analysis of peptide aggregation
Martins, Danubia Batista; ; ; de Souza, Bibiana Monson ; ; Palma, Mario Sérgio ; ; dos Santos Cabrera, Marcia Perez (Amino Acids, 2020) [Artigo]
Increasing resistance in antibiotic and chemotherapeutic treatments has been pushing studies of design and evaluation of bioactive peptides. Designing relies on different approaches from minimalist sequences and endogenous ... -
1H, 29Si and 119Sn double and triple resonance NMR spectroscopy of the small-pore framework sodium stannosilicate Na2SnSi3O9·2H2O
da Silva, Danilo Antonio; ; Contro, Janine ; Medeiros, Vinicius Litrenta ; Nery, José Geraldo ; (Solid State Nuclear Magnetic Resonance, 2020) [Artigo]
The small-pore framework sodium stannosilicate AV-10, chemical composition Na2SnSi3O9·2H2O and known crystallographic structure, was synthesized by hydrothermal crystallization. This stannosilicate is built up of a ... -
Insights into interactions of flavanones with target human respiratory syncytial virus M2-1 protein from STD-NMR, fluorescence spectroscopy, and computational simulations
Piva, Hêmily M. R.; Sá, Jéssica M. ; Miranda, Artemiza S. ; ; Fossey, Marcelo A. ; Souza, Fátima P. ; Caruso, Ícaro P. (International Journal of Molecular Sciences, 2020) [Artigo]
The human Respiratory Syncytial Virus (hRSV) is the most frequent agent of respiratory infections in infants and children with no currently approved vaccine. The M2-1 protein is an important transcriptional antitermination ... -
A single P115Q mutation modulates specificity in the Corynebacterium pseudotuberculosis arginine repressor
Mariutti, Ricardo B.; Hernández-González, Jorge E. ; ; ; ; Carareto, Claudia M.A. ; Arni, Raghuvir K. (Biochimica et Biophysica Acta - General Subjects, 2020) [Artigo]
The arginine repressor (ArgR) regulates the expression of genes involved in arginine biosynthesis. Upon attaining a threshold concentration of arginine in the cytoplasm, the trimeric C-terminal domain of ArgR binds three ... -
Effect of piperlongumine during exposure to cigarette smoke reduces inflammation and lung injury
; Souza, Helena R.; Possebon, Lucas ; Cornélio, Marinônio L. ; ; Girol, Ana Paula ; Oliani, Sonia M. (Pulmonary Pharmacology and Therapeutics, 2020) [Artigo]
Chronic obstructive pulmonary disease (COPD) is related to smoking and anti-inflammatory therapy is indicated. Among the mediators with anti-inflammatory properties, we highlight piperlongumine (PL), an alkaloid/amide of ... -
Synthesis of ETS-10-like vanadosilicates using 2,6-dimethylpiperidinium cation derivatives as organic templates
Contro, Janine; Paula, Alex S. ; Medeiros, Vinicius Litrenta ; ; ; Nery, José G. (Inorganic Chemistry Communications, 2020) [Artigo]
Systematic vanadosilicate syntheses were performed using derivatives of 2,6-dimethylpiperidine as organic structure-directing agents (SDAs). Physicochemical analyses of the vanadosilicate materials obtained were carried ... -
Synthesis and characterization of chromium silicate catalyst and its application in the gas phase glycerol transformation into acetaldehyde
Luizon Filho, Roberto A.; Possato, Luiz G. ; Santisteban, Oscar A.N. ; de Vasconcellos, Adriano ; da Silva, Danilo A. ; Lima, Marcelo F. ; Martins, Leandro ; Nery, José G. (Inorganic Chemistry Communications, 2020) [Artigo]
Chromium silicates with MFI topology were hydrothermally synthesized, characterized, and applied as heterogeneous catalysts on the one-step gas-phase glycerol conversion into acetaldehyde and acrolein. The catalysts were ... -
Fluorescence spectroscopic and dynamics simulation studies on isoorientin binding with human serum albumin
Caruso, Ícaro Putinhon; Vilegas, Wagner ; Cristante de Oliveira, Leandro ; Cornélio, Marinônio Lopes (Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2020) [Artigo]
Isoorientin (ISOO) a glycosylated flavonoid found in acai berry exhibits relevant activities such as antidiabetic and antidepressant. However, its physicochemical action on any molecular target is scarcely known. In this ... -
4-Methylesculetin, a natural coumarin with intestinal anti-inflammatory activity, elicits a glutathione antioxidant response by different mechanisms
Tanimoto, Alexandre; Witaicenis, Aline ; Caruso, Ícaro P. ; Piva, Hémily M.R. ; Araujo, Gabriela C. ; Moraes, Fábio R. ; Fossey, Marcelo C. ; Cornélio, Marinonio L. ; Souza, Fátima P. ; Di Stasi, Luiz C. (Chemico-Biological Interactions, 2020) [Artigo]
4-methylesculetin (4 ME) is a natural antioxidant coumarin with protective effects on the intestinal inflammation, in which oxidative stress plays a key role in its aetiology and pathophysiology. Based on this, we examined ... -
Details of the cooperative binding of piperlongumine with rat serum albumin obtained by spectroscopic and computational analyses
Povinelli, Ana Paula Ribeiro; Zazeri, Gabriel ; de Freitas Lima, Marcelo ; Cornélio, Marinônio Lopes (Scientific Reports, 2019) [Artigo]
Piperlongumine (PPL) has presented a variety of important pharmacological activities. In recent pharmacokinetics studies in rats, this molecule reached 76.39% of bioavailability. Although PPL is present in the bloodstream, ... -
Sorption isotherms and thermodynamic analysis of seed fruits used to obtain vegetable oil
Silva, K. S.; Romero, J. T. ; Mauro, M. A. (Latin American Applied Research, 2015) [Artigo]
Sorption isotherms of papaya, melon and grape seeds were determined and thermodynamic properties compared. The experiments were carried out at different temperature using the gravimetric method. The Henderson and GAB models ... -
PHOSPHOLIPASE D FROM VENOMS OF LOXOSCELES SPIDERS: A STRUCTURAL, BIOCHEMICAL AND BIOLOGICAL COMPARISON
; ; Muriutti, Ricardo Barros; ; ; ; ; ; ; et al. (Toxicon, 2019) [Resumo]