Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Carmen Luísa Barbosa Guedes"'
Autor:
João Rafael de Moraes Cini, Dionísio Borsato, Carmen Luísa Barbosa Guedes, Hágata Cremasco da Silva, Rodolfo Lopes Coppo
Publikováno v:
Química Nova, Vol 36, Iss 1, Pp 79-84 (2013)
The Rancimat and accelerated stove tests were used to determine the oxidative stability of B100 biodiesel mixed with synthetic antioxidants. The predictive equations, with process variable, were obtained by applying a simplex-centroid design. Regardl
Externí odkaz:
https://doaj.org/article/fe88ace3381c4ddb8e76c16c563d160e
Autor:
Jurandir Pereira Pinto, Ilza Lobo, Carmen Luísa Barbosa Guedes, Angelita Aparecida Ribeiro da Silva
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 27, Iss 2, Pp 105-112 (2006)
The increase in the number of gas stations in Brazil made it also possible the increase in the risk of underground waters contamination due to fuel spill. The polycyclic aromatic hydrocarbons (PAHs) are petroleum-derived components and constitute a g
Externí odkaz:
https://doaj.org/article/bcad5a3c5d2b4bec92e2004e680614c5
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 27, Iss 2, Pp 113-120 (2006)
The constituents of gasoline: benzene, toluene, ethylbenzene and xylenes (BTEX) are frequently found in soils due to leaks in fuel storage tanks and they present chronic toxicity. In this work it was developed and validated a methodology of BTEX anal
Externí odkaz:
https://doaj.org/article/1d2324d4169047aa8920ca7db525def4
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 27, Iss 2 (2006)
Os constituintes da gasolina benzeno, tolueno, etilbenzeno e xilenos (BTEX) são freqüentemente encontrados em solos devido a vazamentos de tanques de estocagem de combustíveis e apresentam toxicidade crônica. Neste trabalho foi desenvolvida e val
Externí odkaz:
https://doaj.org/article/c2a97c97d2104e75a43ee7a94f940b8f
Autor:
Angelita Aparecida Ribeiro da Silva, Ilza Lobo, Carmen Luísa Barbosa Guedes, Jurandir Pereira Pinto
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 27, Iss 2 (2006)
O aumento do número de postos de combustíveis no Brasil possibilitou-se também um aumento do risco de contaminação das águas subterrâneas devido aos derramamentos de combustíveis. Os hidrocarbonetos policíclicos aromáticos (HPAs), component
Externí odkaz:
https://doaj.org/article/620e7b88cb054bc9bbbe369d6de9aa98
Autor:
Mayerlin Edith Acuña Montaño, Luciane Effting, Carmen Luisa Barbosa Guedes, Gregorio Guadalupe Carbajal Arizaga, Renata Mello Giona, Patricia Hissae Yassue Cordeiro, César Ricardo Teixeira Tarley, Alesandro Bail
Publikováno v:
Journal of Analytical Science and Technology, Vol 15, Iss 1, Pp 1-18 (2024)
Abstract A static batch arrangement composed of anti-leak vials coupled to gas chromatography is proposed as a complementary system for performance assessment of biogas desulfurization by adsorption. For testing, a modified commercial activated carbo
Externí odkaz:
https://doaj.org/article/44d96689725b406c9715a4ed8ec33786
Autor:
Marilene Turini, Piccinato, Marcello Ferreira, da Costa, André Tsutomu, Ota, Carmen Luísa Barbosa, Guedes, Eduardo, Di Mauro
Publikováno v:
Magnetic resonance in chemistry : MRC. 53(2)
Calculations on electronic structure of the perinaphthenyl radical and phenalenyl derivative radicals responsible for the composition of the ESR spectrum of marine diesel under heating were performed to obtain support for the experimental ESR results
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::13f56a5caad088d1d7e5125eb96b2afc
https://pubmed.ncbi.nlm.nih.gov/25263851
https://pubmed.ncbi.nlm.nih.gov/25263851
Autor:
Gabriel Henrique Dias, Carmen Luisa Barbosa Guedes, Elisangela Tavares da Silva, Karina Gomes Angilelli, Rodolfo Lopes Coppo, Dionisio Borsato
Publikováno v:
Acta Scientiarum: Technology, Vol 36, Iss 3, Pp 505-512 (2014)
O delineamento simplex-centroide foi aplicado para otimizar as condições de obtenção de biodiesel B100 de óleo de girassol, utilizando diferentes catalisadores, com metanol e etanol como variável de processo. A reação de transesterificação,
Externí odkaz:
https://doaj.org/article/ff306388e7c64c3996e3c6427f352a30
Autor:
Ilza Lobo, Caryna Januario Correr, Carmen Luisa Barbosa Guedes, Otavio Jorge Grigoli Abi-Saab
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 31, Iss 2, Pp 87-100 (2010)
The process of washing soil with surfactants, sodium lauryl ether sulphate (LESS) and sodium lauryl sulphate (SDS) was combined with chemical oxidation using hydrogen peroxide, with a view to in situ remediation of clay soil contaminated with hydroca
Externí odkaz:
https://doaj.org/article/39462573332a4002b08c38aa2268d687
Autor:
Kelly Roberta Spacino, Gabriel Henrique Dias, Jurandir Pereira Pinto, Ivanira Moreira, Carmen Luisa Barbosa Guedes, Dionisio Borsato
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 31, Iss 1, Pp 3-13 (2010)
The optimization of the yield of transesterification reaction to obtain the B100 biodiesel has been studied using sodium hydroxide, potassium hydroxide, methoxide and sodium ethoxide as catalysts. We applied a randomized simplex centroid mixture and
Externí odkaz:
https://doaj.org/article/f898d8f0b1504a11bda39399b1683a01