Composição em ácidos graxos de óleos vegetais e gorduras animais

Fonseca, Hugo Calixto; Gutierrez, Luiz Eduardo

doi:10.1590/s0071-12761974000100038

Cited by 13 publications

(6 citation statements)

References 5 publications

(1 reference statement)

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“…The high emulsification index obtained by the soy oil suggests a higher affinity of the biosurfactant produced in the present work by the functional groups found in this oil that is basically formed by fatty acids of 16 and 18 carbons, as reported by Fonseca and Gutierrez (1974). Gasoline and diesel are made up of mixtures of hydrocarbons ranging from 4 to 12 carbons for gasoline and 8 to 16 carbons for diesel, as described by the National Agency for Petroleum, Natural Gas and Biofuels (2016).…”

Section: Emulsification Indexsupporting

confidence: 68%

Biosurfactant production by Bacillus subtilis UFPEDA 86 using papaya (Carica papaya L.) waste as substrate: Viability studies and pH influence of the culture medium

Soares¹,

Andrade²,

Ferreira³

et al. 2018

Afr. J. Biotechnol.

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Biosurfactants are surface-active compounds derived from microorganisms and offer several advantages over chemical surfactants, such as low toxicity, good biodegradability and ecological acceptability. Even though interest in biosurfactants is increasing, these bioproducts do not compete economically with synthetic surfactants due to the overall costs of the bioprocess. The use of inexpensive raw materials is an important approach to reduce these costs since the substrate price account for 10 to 30% of the final product expenses. In this study, papaya (Carica papaya L.) waste was used as a substrate to produce biosurfactant by Bacillus subtilis UFPEDA 86 strain. In addition, culture medium pH was corrected from 5.25 to 6.8 in order to analyze the influence of this variable on the biosurfactant production. The submerged fermentation was carried out on a shaker incubator at 37°C, 200 rpm for 96 h. Biomass and substrate concentration, surface tension, emulsification index and critical micelle concentration were analyzed. The strain was well adapted to both substrates studied, without and with pH correction. Using the broth without pH correction (pH=5.25), a maximum cell concentration of 1.07 g L -1 at 36 h a 25.5% surface tension reduction, emulsification index of around 61% and critical micelle concentration of about 35 mg L -1 was obtained. Using the broth with pH correction to 6.8, better results; maximum cell concentration of 1.14 g L -1 at 24 h, a 32.5% surface tension reduction, emulsification index of around 66% and critical micelle concentration at about 35 mg L -1 was obtained. The papaya waste proved to be an effective substrate in the biosurfactant production by B. subtilis UFPEDA 86 and the pH variable proved to be of great importance in the yield of this process.

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Section: Emulsification Indexsupporting

confidence: 68%

Biosurfactant production by Bacillus subtilis UFPEDA 86 using papaya (Carica papaya L.) waste as substrate: Viability studies and pH influence of the culture medium

Soares¹,

Andrade²,

Ferreira³

et al. 2018

Afr. J. Biotechnol.

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“…Also in this region occurs wagging vibration, common in compounds containing more than four bound methylene groups linked to the formation of polyunsaturated compounds (such as ω-3 and ω-6). About 8% of the fatty acid content of SO is of α-linolenic acid, a ω-3 compound (Fonseca & Gutierrez, 1974).…”

Section: Lipid Regionsmentioning

confidence: 99%

“…S1, where the absorbance level is substantially higher in pure SO than in pure BO. This band is characteristic of stretches of -C=C-H bonds present in double bonds of unsaturated fatty acids, such as linoleic acid (C18:2) and α-linolenic acid (Kadamne et al, 2009;Koca et al, 2010), which are highly present in vegetable oils, such as soybean (Fonseca & Gutierrez, 1974), but in low concentrations in butter as shown in Table 2. Similar behavior was observed in adulteration of butter with margarine (Koca et al, 2010).…”

Section: Lipid Regionsmentioning

confidence: 99%

“…As the fat content decreased, the moisture and protein content increased. According to Foda, Bahgaat, Kassem, and Aly (2013), differences in moisture content may be related to differences in protein content, the type of vegetable Table 2 Fatty acid composition of soybean oil (SO) and butter oil (BO) (Fonseca & Gutierrez, 1974). oil used in cheese making, and its ability to hold water.…”

Section: Protein and Water Regionsmentioning

confidence: 99%

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FTIR-ATR spectroscopy as a tool for the rapid detection of adulterations in butter cheeses

Leite

Pereira

Andrade

et al. 2019

LWT

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“…Assim chegamos aos valores apresentados na Tabela 1. GUTIERREZ, 1974;ANDRADE et al, 1994;ZAMBIAZI et al, 2007;MARTIM e SCHUARÇA, 2015Milho 292,30 0,62 FONSECA e GUTIERREZ, 1974JORGE et al, 2005;ZAMBIAZI et al, 2007;BARAJAS, 2016Sebo bovino 286,72 2,07 LOPES, 2002FARIA, 2008;MORAES, 2008;MAGALHÃES, 2010;VARÃO, 2017 Equação 1: Cálculo para obtenção do Índice de Saponificação.…”

Section: íNdice De Saponificaçãounclassified

Metodologia Titulométrica Para Determinação Do Teor De Biodiesel Em Soluções Com Diesel De Petróleo

Cancela¹,

Cescon²

2020

REPECT

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O Biodiesel é um dos principais combustíveis alternativos, produzido a partir de óleos vegetais e animais. A lei 13.033 de 2014 dispõe sobre a adição obrigatória do biodiesel no óleo diesel comercial, fixando um valor mínimo de 12 % em 2020. A maior causa de não conformidade no óleo diesel é o teor de biodiesel, sendo necessária uma fiscalização intensiva a fim de evitar tal problema. Para isso, existem convênios entre instituições de pesquisa e a ANP (órgão regulamentador), aumentando o número de fiscalizações e coibindo as fraudes. Para a determinação do teor de biodiesel a ANP utiliza a técnica de análise em infravermelho médio (FTIR) que exige muitas amostras e uma calibração complexa, difícil de ser executada por todas as instituições de pesquisas. A metodologia titulométrica apresentada neste trabalho é de fácil execução, pois faz uso apenas de métodos clássicos, não necessita de amostras de referência assim como grandes quantidades de amostras. Foi sintetizado biodiesel a partir de óleo de soja, milho e sebo bovino, misturando-os com óleo diesel puro em concentrações conhecidas, analisando o índice de saponificação de cada um deles em comparação com o teor de biodiesel. Tal metodologia apresentou bons resultados na determinação do teor de biodiesel. Foi realizada uma comparação entre ambas as metodologias, onde além de ser de execução mais simples, a metodologia titulométrica mostrou ser factível a criação de um modelo teórico de comparação entre o índice de saponificação da amostra e seu teor de biodiesel, o que pode contribuir para que mais laboratórios estejam aptos a executar o procedimento de análise e assim aumentando a eficiência da fiscalização.

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Composição em ácidos graxos de óleos vegetais e gorduras animais

Cited by 13 publications

References 5 publications

Biosurfactant production by Bacillus subtilis UFPEDA 86 using papaya (Carica papaya L.) waste as substrate: Viability studies and pH influence of the culture medium

Biosurfactant production by Bacillus subtilis UFPEDA 86 using papaya (Carica papaya L.) waste as substrate: Viability studies and pH influence of the culture medium

FTIR-ATR spectroscopy as a tool for the rapid detection of adulterations in butter cheeses

Metodologia Titulométrica Para Determinação Do Teor De Biodiesel Em Soluções Com Diesel De Petróleo

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