Teaching the Undergraduate Laboratory During Pandemic Time: Using the Synthesis of a Biodiesel Model to Demonstrate Aspects of Green Chemistry

Autor: Omar A. El Seoud, Nicolas Keppeler, Luzia P. Novaki

Publikováno v: Journal of Chemical Education. 98:3962-3967

We report on a distance learning experimental project for chemistry-major students on the synthesis of ethyl dodecanoate (C11CO2Et), a model for biodiesel, considering green chemistry principles. T...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6bc4bb5449b0817191430d2de83259da
https://doi.org/10.1021/acs.jchemed.1c00779

Application of Chemometrics and Tandem Techniques in the Chemistry of Beverages: Analysis of Methylxanthines in Guaraná Powder Extract

Autor: Omar A. El Seoud, Luzia P. Novaki, Nicolas Keppeler, Ana M. Chinelatto, Soraya S. Santos, Vânia A. B. B. Silva

Publikováno v: Journal of Laboratory Chemical Education. 8:33-39

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::56a7fafcc75c2424ef258981bd55be76
https://doi.org/10.5923/j.jlce.20200802.03

Dissolution of Asphaltene in Binary Mixtures of Organic Solvents and Model Maltenes: Unambiguous Evidence for Asphaltene Preferential Solvation and Relevance to Assessing the Efficiency of Additives for Asphaltene Stabilization

Autor: Luzia P. Novaki, Wilhelm J. Baader, Omar A. El Seoud, Leticia T. Paulucci, Nicolas Keppeler, Marcia Cristina Khalil de Oliveira, Francis A Meireles, Michelle M. N. Kwon

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

Asphaltenes (Asps) are operationally defined as the toluene-soluble but n-pentane- or n-heptane-insoluble fractions, e.g., of crude oils. Therefore, there is intense interest in determining the concentration of n-heptane required to precipitate Asps

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::921e7a648568b9fcbe4fcfad5fcd2e5f
https://doi.org/10.1021/acs.energyfuels.8b02892

Solvatochromic and Solubility Parameters of Solvents: Equivalence of the Scales and Application to Probe the Solubilization of Asphaltenes

Autor: Marcia Cristina Khalil de Oliveira, Raphael A. de Lira, André B. Gonçalves, Gaspar González, Omar A. El Seoud, Vanessa N Linhares, Francis A Meireles, Edgar O. Moraes, Luzia P. Novaki

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

The oil compatibility model is important for assessing the stability of crudes. The compatibility between maltenes and the corresponding asphaltenes, Asphs, can be assessed from the solubility parameters (Hildebrand and Hansen) of both components of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9cc4dedb9237bfdfaa1eed27e28b068
https://doi.org/10.1021/acs.energyfuels.6b00461

An Active Learning-Based Integrated Project between High Schools and the University: Analysis of Bioethanol Fuel and Its Blends with Synthetic Gasoline

Autor: Luzia P. Novaki, Ana M. Chinelatto, Omar A. El Seoud

Publikováno v: Journal of Laboratory Chemical Education. 3:59-66

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::52c80263358c8518b506b216885fdb99
https://doi.org/10.5923/j.jlce.20150304.01