Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Rommel B. Viana"'
Publikováno v:
Orbital: The Electronic Journal of Chemistry, Vol 8, Iss 2, Pp 96-101 (2016)
The objective of this study was to qualitatively analyze the polymerization of a nanoparticle resin; the method used combined a fluorescence spectroscopy technique with the use of Rhodamine dye. For comparative purposes, differential scanning calorim
Externí odkaz:
https://doaj.org/article/667d1ca1d38544859fd277efa7362f14
Autor:
Suelen T. G. Buck, Fernanda Bettanin, Ednilson Orestes, Paula Homem-de-Mello, Hidetake Imasato, Rommel B. Viana, Janice R. Perussi, Albérico B. F. da Silva
Publikováno v:
Journal of Chemistry, Vol 2017 (2017)
The aim of this study is to assess the insights of molecular properties of the xanthene dyes [fluorescein (FL), Rose Bengal (RB), erythrosin B (EB), and eosin Y (EY)] to correlate systematically their photodynamic efficiency as well as their phototox
Externí odkaz:
https://doaj.org/article/c9122d99617346898cf5e6471c4219fd
Autor:
Ana Hilda Romero Costa, Rommel B. Viana, Nicolai Mirlean, Paulo R. M. Baisch, Rivelino M. Cavalcante
Publikováno v:
Orbital: The Electronic Journal of Chemistry, Vol 5, Iss 4, Pp 225-232 (2014)
Neste estudo foi aplicado a método de cromatografia de permeação em gel para determinar a distribuição dos metais Cu, Pb e Zn em frações orgânicas coletadas de sedimentos no estuário da Lagoa dos Patos. As concentrações de Zn variaram de 5
Externí odkaz:
https://doaj.org/article/59c4c58f8ae94bd7963aba42f2e8b7ce
Autor:
Káthia M. Honório, Marcieni A. Andrade, Ednilsom Orestes, Ana C. Baetas, Rommel B. Viana, João Batista Jr., Rosivaldo S. Borges, Albérico B. F. da Silva
Publikováno v:
Molecules, Vol 18, Iss 10, Pp 12663-12674 (2013)
An antioxidant mechanism of tetrahydrocannabinol (THC) and cannabidiol (CBD) were compared with a simplified model of α-tocopherol, butylhydroxytoluene and hydroxytoluene in order to understand the antioxidant nature of THC and CBD molecules using D
Externí odkaz:
https://doaj.org/article/3f3ed40451cb40dfb6b8c4ded29c8a57
Publikováno v:
Journal of Spectroscopy, Vol 2016 (2016)
This study aimed to analyze the kinetic parameters of two monomers using attenuated total reflectance Fourier transform infrared (ATR-FTIR): 2,2-bis-[4-(2-hydroxy-3-methacryloxypropyl-1-oxy)-phenyl] propane (Bis-GMA) and triethylene glycol dimethacry
Externí odkaz:
https://doaj.org/article/036f204110e54d84a6c4768b91ca63f6
Autor:
Rivelino M. Cavalcante, Danielle M. de Lima, Leandro M. Correia, Ronaldo F. Nascimento, Edilberto R. Silveira, George S. S. Freire, Rommel B. Viana
Publikováno v:
Química Nova, Vol 31, Iss 6, Pp 1371-1377 (2008)
Extraction and clean-up are essential points in polycyclic aromatic hydrocarbon (PAHs) analysis in a solid matrix. This work compares extraction techniques and clean-up procedures for PAH analysis. PAH levels, their toxicological significance and sou
Externí odkaz:
https://doaj.org/article/9053a998a7e9476cb8bbdb4e3364e6a7
Autor:
Rivelino M. Cavalcante, Nilton S. M. Filho, Rommel B. Viana, Isadora R. N. Oliveira, Ronaldo F. Nascimento, Edilberto R. Silveira, George S. S. Freire
Publikováno v:
Química Nova, Vol 30, Iss 3, Pp 560-564 (2007)
Polycyclic aromatic hydrocarbons (PAHs) are a great environmental concern mainly because of their toxic, mutagenic and carcinogenic potential. This paper reports utilization of the solid-phase extraction (SPE) technique to determine PAHs in environme
Externí odkaz:
https://doaj.org/article/7fce1d301b694eb88f797aeee981a7cb
Autor:
Adilson Kleber Ferreira, João Honorato, Sarah Fernandes Teixeira, Denise de Oliveira Silva, Rommel B. Viana, Antonio Carlos Stábile, Rodrigo Luis Silva Ribeiro Santos, Julie Pauline Gaitan Tabares, Marcio Henrique Zaim, Jefferson Luiz Cassiano, Alzir A. Batista, Sandra Martinez
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The design of new Ru(II) organometallics is a subject of interest to the field of anticancer metallodrugs. This work reports the interaction of the Ru(II)-η6-p-cymene framework with naproxen-pyridineamide (Npxpya, L1), a structurally modified form o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acaca1085b3cf804f22b421e6a3d4c9b
https://doi.org/10.1016/j.ica.2019.01.030
https://doi.org/10.1016/j.ica.2019.01.030
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab99a086e3f777ee6c6a3ede7a248bc5
https://doi.org/10.1016/j.comptc.2022.113769
https://doi.org/10.1016/j.comptc.2022.113769
Autor:
Rommel B. Viana, R. H. De Almeida Santos, Denise Gilmour, Alan R. Kennedy, Rodolfo Moreno-Fuquen
Publikováno v:
Acta Crystallographica Section E, Vol 65, Iss 12, Pp o3044-o3045 (2009)
In the title salt, C3H5N2+·C7H6NO2−, the carboxylate group of the 4-aminobenzoate anion forms a dihedral angle of 13.23 (17)° with respect to the benzene ring. There are N—H...O hydrogen-bonding interactions between the anion and cation, and we
Externí odkaz:
https://doaj.org/article/43162ffd3c4d46be912180f393957de2