Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Luiz Henrique Keng Queiroz Júnior"'
RESSONÂNCIA MAGNÉTICA NUCLEAR DE SUBSTÂNCIAS ORGANOFLUORADAS: UM DESAFIO NO ENSINO DE ESPECTROSCOPIA
Autor:
Frederico Silva Castelo Branco, Bárbara V. Silva, Gabriel Freitas do Rio, Mábio João Santana, Luiz Henrique Keng Queiroz Júnior, Angelo C. Pinto, Núbia Boechat, Luciano Morais Lião
Publikováno v:
Química Nova, Vol 38, Iss 9, Pp 1237-1246 (2015)
Nuclear magnetic resonance is a technique that is widely used for elucidating and characterizing organic substances. Organofluorine substances have applications in many areas from drugs to liquid crystals, but their NMR spectra are often challenging
Externí odkaz:
https://doaj.org/article/16bf8215784146e0a836a754772da4bd
Autor:
Luiz Henrique Keng Queiroz Júnior, Jefferson Richard Dias-Silva, Flávio O. Sanches-Neto, Valter H. Carvalho-Silva
Publikováno v:
Environmental Science & Technology. 55:12437-12448
We developed a web application structured in a machine learning and molecular fingerprint algorithm for the automatic calculation of the reaction rate constant of the oxidative processes of organic pollutants by •OH and SO4•- radicals in the aque
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8267631da855785753273027b56cc3b
https://doi.org/10.1021/acs.est.1c04326
https://doi.org/10.1021/acs.est.1c04326
Autor:
Luiz Henrique Keng Queiroz Júnior, Caridad N. Perez, Felipe T. Martins, Stefânio Barreto, Mábio J. Santana, Manoel Odorico de Moraes, Cameron Capeletti da Silva, Rosa Silva Lima
Publikováno v:
Arabian Journal of Chemistry, Vol 12, Iss 8, Pp 3890-3901 (2019)
Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC
Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC
Compounds with either ionone or chalcone skeletons present many biological properties including anticancer activity. Here we have prepared eight terpenoid-like chalcones in order to assess whether hybrid compounds with both structural frameworks coul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32a357f07b8f082b32af10a89662ab1a
http://www.sciencedirect.com/science/article/pii/S1878535216000381
http://www.sciencedirect.com/science/article/pii/S1878535216000381
Autor:
Felipe T. Martins, Luiz Henrique Keng Queiroz Júnior, Flávia Carneiro Gonçalves, Pedro Henrique Ferri, Luciano M. Lião, Vitor Mendes de Oliveira
Publikováno v:
Journal of Food Composition and Analysis. 105:104229
The complex mixture found in mozzarella cheese favors microorganism proliferation that causes spoilage. Appropriate refrigeration during storage is one step in the supply chain that is critical to guarantee food quality. However, the impact of the ab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::138a5290c17020f052e4be3e2205482a
https://doi.org/10.1016/j.jfca.2021.104229
https://doi.org/10.1016/j.jfca.2021.104229
Autor:
Leonardo Gomes Souza, Luciano M. Lião, Ricardo Neves Marreto, Mábio J. Santana, Luís Antônio Dantas Silva, Raquel Ciffarello Guilger, Luiz Henrique Keng Queiroz Júnior, Stephania F. Taveira, Emanuelle Jesus Silva
Publikováno v:
Current Drug Delivery. 15:979-986
BACKGROUND Topotecan (TPT) is a water-soluble derivate of camptothecin, which undergoes ring-opening hydrolysis in neutral solutions, leading to stability loss and poor cellular uptake. Lipid nanoencapsulation can improve TPT stability, and polymer-l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5609f56f303c10ae2a029d518b6e4889
https://doi.org/10.2174/1567201815666171215110026
https://doi.org/10.2174/1567201815666171215110026
Autor:
Wagner Wollinger, Luiz Henrique Keng Queiroz Júnior, Bruno C. Garrido, Jane L. N. Fernandes, Francisco Radler de Aquino Neto
Publikováno v:
Microchemical Journal. 140:167-175
NMR is a primary method of measurement that provides quantitative traceable results without the need for a standard of the same measurand. Despite the advantages of the 1H nucleus, such as high sensitivity, short relaxation times and widespread distr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b647602e98c3b225c367724c37a362f
https://doi.org/10.1016/j.microc.2018.04.021
https://doi.org/10.1016/j.microc.2018.04.021
Autor:
Isabela Barroso Taver, Guilherme de Oliveira Machado, Angelo Pedro Jacomino, Luiz Henrique Keng Queiroz Júnior, Banny Silva Barbosa Correia, Luiz Alberto Colnago, Renan Ziemann Wilhelms, Karla Rodrigues Borba, Poliana Cristina Spricigo
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Molecules
Volume 26
Issue 12
Molecules, Vol 26, Iss 3613, p 3613 (2021)
Universidade de São Paulo (USP)
instacron:USP
Molecules
Volume 26
Issue 12
Molecules, Vol 26, Iss 3613, p 3613 (2021)
The cambuci is a native Brazilian fruit from the Atlantic Forest biome. A soft and astringent pulp, a green color, and a sweet aroma are its main characteristics. Classical food quality attributes (fresh fruit mass, fruit height, diameters, total sol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a16b25d2001117ad7c15e7265322f44e
https://doi.org/10.3390/molecules26123613
https://doi.org/10.3390/molecules26123613
Autor:
Luiz Henrique Keng Queiroz Júnior, Ricardo Costa de Santana, Cameron Capeletti da Silva, José Antônio do Nascimento Neto, Lauro J. Q. Maia, Ana Karoline Silva Mendanha Valdo, Felipe T. Martins, Freddy Fernandes Guimarães
Publikováno v:
Journal of the American Chemical Society. 141(8)
We report a novel bright deep-blue-emitting crystal form based on a simple cadmium coordination polymer with an impressive external photoluminescence quantum yield of 75.4(9)%.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a6ea26f37d127d74672c3a7377aa519
https://pubmed.ncbi.nlm.nih.gov/30702877
https://pubmed.ncbi.nlm.nih.gov/30702877
Autor:
Luiz Henrique Keng Queiroz Júnior, Luiz Alberto Colnago, Ernesto Danieli, Pollyana Ferreira da Silva, Marcelo Carmo, Bruna Ferreira Gomes, Carlos Lobo, Bernhard Blümich
Publikováno v:
Microchemical journal 146, 658-663 (2019). doi:10.1016/j.microc.2019.01.010
The use of nuclear magnetic resonance (NMR) spectroscopy to study electrochemical reactions in situ (EC-NMR), in solution, was demonstrated more than four decades ago. Although, the immense potential of EC-NMR has been demonstrated in several applica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0ee2ce80a960744b7fa72b560598e28
https://hdl.handle.net/2128/33018
https://hdl.handle.net/2128/33018
Autor:
Luiz Henrique Keng Queiroz Júnior, Géssica A. Vasconcelos, Boniek G. Vaz, Tarcisio da Silva Vieira, Ângelo de Fátima, Felipe Terra Martins, Cleiton Moreira da Silva
Publikováno v:
CrystEngComm. 18:6987-6991
Here we report the tail-to-tail dimerization of tetra(carboxymethoxy)calix[4]arene in both solution and solid state phases using ESI-orbitrap UHRMS, 1H-NMR and single-crystal X-ray diffraction techniques. Three sodium ions are encapsulated into the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9bba2f993e0cd4d6aff2fc6e62d7686
https://doi.org/10.1039/c6ce01387b
https://doi.org/10.1039/c6ce01387b