Results 81 to 90 of about 2,754 (192)

A novel detection method for lipid stability in almond leads to the discovery of marker-trait associations

Fruit Research
Nut kernel rancidity is a significant postharvest concern because it compromises flavor and decreases shelf-life. Roasting of nut kernels changes the chemical structure and leaves the kernel more susceptible to rancidity.
Gina M. Sideli, Selina C. Wang, Brian J. Allen, Filipa S. Grilo, Thomas M. Gradziel   +4 more
doaj   +1 more source

Estabilidad oxidativa y estimación de la vida útil del aceite de sacha inchi (Plukenetia volubilis L.)

Scientia Agropecuaria, 2015
El aceite de sacha inchi es rico en ácidos grasos poli-insaturados que podrían oxidarse, limitando su vida útil. El método Rancimat, es oficial, para evaluaciones aceleradas de estabilidad oxidativa en aceites.
Gilbert Rodríguez, Eudes Villanueva, Patricia Glorio, Mery Baquerizo   +3 more
doaj   +2 more sources

Synthesis of Hydroxytyrosyl Alkyl Ethers from Olive Oil Waste Waters

Molecules, 2009
The preparation of a new type of derivatives of the naturally occurring antioxidant hydroxytyrosol is reported. Hydroxytyrosyl alkyl ethers were obtained in high yield by a three-step procedure starting from hydroxytyrosol isolated from olive oil waste ...
Juan Fernández-Bolaños, Mariana Trujillo, Guillermo Rodríguez, Raquel Mateos, Gema Pereira-Caro, Andrés Madrona, José L. Espartero   +6 more
doaj   +1 more source

Oxidative Stability of Selected Edible Oils

Molecules, 2018
The aim of the study was to examine and compare oxidative stability of refined (peanut, corn, rice bran, grapeseed, and rapeseed) oils. The oils were subject a Schaal Oven Test (temperature 63 ± 1 °C) and a Rancimat test (temperature 120 ° ...
Magdalena Maszewska, Anna Florowska, Elżbieta Dłużewska, Małgorzata Wroniak, Katarzyna Marciniak-Lukasiak, Anna Żbikowska   +5 more
doaj   +1 more source

Relationship structure-antioxidant activity of hindered phenolic compounds

Grasas y Aceites, 2014
The relationship between the structure and the antioxidant activity of 21 hindered phenolic compounds was investigated by Rancimat and DPPH· tests. 3-tert-butyl-5-methylbenzene-1,2-diol is the strongest antioxidant in the Rancimat test but not in the ...
X. C. Weng, Y. Huang
doaj   +1 more source

Variation Quality and Kinetic Parameter of Commercial n-3 PUFA-Rich Oil during Oxidation via Rancimat

, 2017
Different biological sources of n-3 polyunsaturated fatty acids (n-3 PUFA) in mainstream commercial products include algae and fish. Lipid oxidation in n-3 PUFA-rich oil is the most important cause of its deterioration.
Kai-Min Yang, Po-Yuan Chiang
core   +1 more source

¹H NMR and UV-Vis as Analytical Techniques to Evaluate Biodiesel Conversion and Oxidative Stability

Fuels
The present study evaluated the applicability of 1H NMR and UV-Vis spectroscopies as analytical techniques for the characterization and determination of biodiesel conversion and for monitoring the oxidative stability of biodiesel samples with ...
Emanuelle Braga, Luana Damasceno, Chastryane Barros de Sousa Silva, Lucas Silva, Maria Cavalcante, César Barreto, Silvia Silva, Francisco Murilo Tavares de Luna, Luciana Bertini, Tassio Nascimento, Maria Rios   +10 more
doaj   +1 more source

Comparação dos métodos de determinação da estabilidade oxidativa de biodiesel B100, em mistura com antioxidantes sintéticos: aplicação do delineamento simplex-centroide com variável de processo Comparison of methods for determination of oxidative stability of B100 biodiesel mixed with synthetic antioxidants: application of simplex-centroid design with process variable

Química Nova, 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.
João Rafael de Moraes Cini, Dionísio Borsato, Carmen Luísa Barbosa Guedes, Hágata Cremasco da Silva, Rodolfo Lopes Coppo   +4 more
doaj  

Assessing the oxidative stability of cold pressed rapeseed and sunflower oils with oregano extract added using the Rancimat and Schaal Oven tests [PDF]

, 2008
Celem pracy była ocena stabilności oksydatywnej olejów rzepakowego i słonecznikowego tłoczonych na zimno z dodatkiem ekstraktu z oregano, w teście Rancimat i termostatowym.
Wroniak, M, Lubian, M
core  

Estudo da estabilidade termo-oxidativa de biodiesel por Rancimat, PetroOXY e Termogravimetria [PDF]

, 2012
One of the main concerns of using biodiesel is with thermal and oxidative susceptibility when in contact with air during storage and when subjected to high temperatures under engine operating conditions.
Marinho, Raíssa Bolzan
core   +1 more source