Search Results - "Thomasi, Sérgio S."

Theoretical and X‐Ray Evidence of Electrostatic Phosphonium anti and gauche Effects by Martins, Francisco A., Chagas, Poliane, Thomasi, Sérgio S., Oliveira, Luiz C. A., Diniz, Renata, Freitas, Matheus P.

“…Sulphur, not phosphorus, is the only known third‐row element capable of experiencing an electrostatic gauche effect with fluorine. Some six‐membered rings…”
Get full text

A validated 1H NMR method for quantitative analysis of α-bisabolol in essential oils of Eremanthus erythropappus by Cerceau, Cristiane I., Barbosa, Luiz C.A., Alvarenga, Elson S., Ferreira, Antonio G., Thomasi, Sérgio S.

“…α-Bisabolol is a natural terpene produced by Eremanthus erythropappus and is widely used in cosmetics and pharmaceuticals due to its anti-inflammatory,…”
Get full text

A simple and efficient method for simultaneous quantification of levodopa and carbidopa based on controlled oxidation process by Andrade, Ângela L., Cardoso, Thaís D., Thomasi, Sérgio S., Alvarenga, Meiry E., da Silva, Mirra A. N., Magalhães, Elisângela J., Duarte, Hélio A., de Almeida, Katia J.

“…Levodopa (L-dopa) and carbidopa (C-dopa) are used for the treatment of the Parkinson’s disease. In the present work, an experimental and theoretical…”
Get full text

Use of diffusion-ordered NMR spectroscopy and HPLC-UV-SPE-NMR to identify undeclared synthetic drugs in medicines illegally sold as phytotherapies by Silva, Lorena M. A., Filho, Elenilson G. A., Thomasi, Sérgio S., Silva, Bianca F., Ferreira, Antonio G., Venâncio, Tiago

“…The informal (and/or illegal) e‐commerce of pharmaceutical formulations causes problems that governmental health agencies find hard to control, one of which…”
Get full text

Average shear rate in three pneumatic bioreactors by Thomasi, Sérgio S, Cerri, Marcel O, Badino, Alberto C

“…A method proposed in recent literature was applied to evaluate the average shear rate [graphic removed] in three pneumatic bioreactors of 5-dm³ working volume:…”
Get full text

Conformational analysis of halobenzaldehydes: A theoretical and spectroscopic study by Fernandes, Débora da S.M., Lago, Aline de F.S., Thomasi, Sérgio S., Freitas, Matheus P.

“…•Spectroscopic and computational data inform on conformational effects•The ortho halogen interacts with the formyl group in halobenzaldehydes•The nature of the…”
Get full text

Unusual 2(1H)-pyrazinones isolated from a culture of a Brazilian marine-derived Streptomyces sp by Thomasi, Sergio S, Granato, Ana C, Romano, Luis H, Dhooghe, Liene, do Nascimento, Eduardo S P, Badino, Alberto C, da Silva, Maria F G F, Ferreira, Antonio G, Venâncio, Tiago

“…Four new secondary metabolites, giovaninones A-D (1-4), were isolated from an ethyl acetate extract of a culture of a marine-derived Streptomyces strain…”
Get more information

Voltammetric determination of organic nitrogen compounds in environmental samples using carbon paste electrode modified with activated carbon by Teixeira, Meryene de C., Felix, Fabiana S., Thomasi, Sérgio S., Magriotis, Zuy M., da Silva, Josiane M., Okumura, Leonardo L., Saczk, Adelir A.

“…A quick and simple procedure is described to determine pyridine and quinoline using voltammetric methods and carbon paste electrodes modified with activated…”
Get full text

Secondary Metabolites from an Infusion of Lippia gracilis Schauer Using the LC‑DAD-SPE/NMR Hyphenation Technique by Moraes, Valéria, Thomasi, Sérgio, Sprenger, Ricardo, Prado, Vilma, Cruz, Elizangela, Cass, Quezia, Ferreira, Antônio, Blank, Arie

“…The genus Lippia comprises approximately 200 species of herbs, shrubs and small trees, distributed throughout the South and Central America and tropical…”
Get full text

Preparative Separation and Structural Identification of Impurities of a New α2‑Adrenoceptor Agonist Using Stacking Injection, LC-MSn and LC-SPE-NMR by Cardoso, Josiane, Thomasi, Sérgio, Venâncio, Tiago, Pitta, Ivan, de Lima, Maria do Carmo, Oliveira, Regina

“…Identifying impurities in drug substances has become one of the most important issues in pharmaceutical analysis since it can have a significant impact on the…”
Get full text

A validated 1 H NMR method for quantitative analysis of α-bisabolol in essential oils of Eremanthus erythropappus by Cerceau, Cristiane I, Barbosa, Luiz C A, Alvarenga, Elson S, Ferreira, Antonio G, Thomasi, Sérgio S

“…α-Bisabolol is a natural terpene produced by Eremanthus erythropappus and is widely used in cosmetics and pharmaceuticals due to its anti-inflammatory,…”
Get full text