Results 51 to 60 of about 2,754 (192)

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

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   +1 more source

Influence of antioxidants on oxidative stability of the oil Chia (Salvia hispanica L.) by rancimat

Scientia Agropecuaria, 2017
Oxidative rancidity, known as autoxidation, is the main cause of deterioration of oils and fats, which can be controlled by the use of antioxidants increasing oxidative stability and shelf life. Chia oil is rich in polyunsaturated fatty acids (PUFAs), particularly omega-3 (ω-3) and omega-6 (ω-6) beneficial to human health, but PUFAs also favor the ...
Villanueva, Eudes, Rodríguez, Gilbert, Aguirre, Elza, Castro, Víctor   +3 more
openaire   +3 more sources

Phytochemistry and Bioactivities of Thymol and Carvacrol: Molecular Pathways, Metabolism, and Therapeutic Insights

Food Science &Nutrition, Volume 14, Issue 4, April 2026.
Thymus serpyllum (wild thyme) contains bioactive compounds such as carvacrol, thymol, β‐caryophyllene, γ‐terpinene, and α‐thujene, along with essential vitamins and minerals. These constituents exhibit antioxidant, antimicrobial, anti‐inflammatory, and antidiabetic activities.
Ahmad Mujtaba Noman, Muhammad Tauseef Sultan, Farhang Hameed Awlqadr, Hassan Raza, Shehnshah Zafar, Aimen Mazhar, Duaa Tariq, Muhammed Noori Saeed, Khaled Arab   +8 more
wiley   +1 more source

Structure-Activity Relationship of Flavonoids Active Against Lard Oil Oxidation Based on Quantum Chemical Analysis

Molecules, 2008
In this study, the antioxidant activities of 15 flavonoids against lard oil oxidation were determined by using the Rancimat test. Quercetin, dihydromyricetin, luteolin and kaempferol showed the strongest antioxidant activity, with protection factor ...
Zheng-Xiang Ning, Gui-Zhao Liang, Ben-Guo Liu, Ji-Guo Yang   +3 more
doaj   +1 more source

Inhibition of Hydroperoxy‐, Keto‐ and Hydroxy‐FAME by Alpha‐ and Delta‐Tocopherol at Rancimat Conditions [PDF]

Journal of the American Oil Chemists' Society, 2015
AbstractThe effects of α‐ and δ‐tocopherol on inhibition of hydroperoxides, keto and hydroxy compounds under Rancimat conditions, i.e. 100 °C and air bubbling, were studied in samples of fatty acid methyl esters (FAME) obtained from high linoleic (HL) and high oleic (HO) sunflower oils. Primary hydroperoxides from methyl linoleate and methyl oleate and
Susana Marmesat, Arturo Morales, M. Victoria Ruiz‐Méndez, Gloria Márquez‐Ruiz, Joaquín Velasco   +4 more
openaire   +1 more source

Enhancing the Multifunctional Qualities of Palm Oil With Plant‐Derived Essential Oils: An Integrated HPLC and RSM Approach

Food Science &Nutrition, Volume 14, Issue 4, April 2026.
The results established that the treatments obviously retard the thermal degradation and hydrolytic decomposition of the palm oil, which can be attributed to the antioxidant effects (high phytochemical content) of the essential oils used as the treatment material. Markedly, the bio‐fortified palm oil samples recorded greater nutritional, physiochemical,
Manal A. Almalki, H. Uguru, O. Nyorere, O. Eboibi, O. Akpomedaye, Nashi K. Alqahtani, Sarah Alharthi, Rokayya Sami, Norah E. Aljohani, Afnan M. Alnajeebi, Mahmoud Helal   +10 more
wiley   +1 more source

Natural‐based antioxidants in cosmeceuticals: Extraction, bioavailability and skin ageing applications

International Journal of Cosmetic Science, Volume 48, Issue 2, Page 394-427, April 2026.
Natural antioxidants from plants, fruits, seeds and fungi combat ageing by neutralizing free radicals, boosting collagen and protecting against UV damage. Enhanced by green extraction and smart delivery systems, they offer powerful anti‐inflammatory and antimicrobial benefits.
Hossein Omidian, Arnavaz Akhzarmehr, Charise Dallazem Bertol   +2 more
wiley   +1 more source

Oxidative stability and estimate of the shelf life of sacha inchi (Plukenetia volubilis L.) oil

Scientia Agropecuaria, 2015
Sacha inchi oil is rich in polyunsaturated fatty acids that may rust, limiting their shel flife. The Rancimat method is official, for evaluations of oxidative stability accelerated in oils.
Gilbert Rodríguez, Eudes Villanueva, Patricia Glorio   +2 more
doaj   +1 more source

Opuntia Ficus-Indica Peel By-Product as a Natural Antioxidant Food Additive and Natural Anticoccidial Drug

Foods, 2023
The present study was carried out to valorize the Opuntia ficus-indica (OFI) by-products by extracting and identifying their biochemical compounds and evaluating their antioxidant potential by in vitro activities (DPPH radical and FRAP), as well as their
Meriem Amrane-Abider, Mirela Imre, Viorel Herman, Nedjima Debbou-Iouknane, Fairouz Saci, Hafid Boudries, Khodir Madani, Hafida Merzouk, Abdelhanine Ayad   +8 more
doaj   +1 more source

Fluorescent light and sunlight radiations may improve rice bran oil colour and influence its oxidative stability and chemical composition

Food Biomacromolecules, Volume 3, Issue 1, Page 71-80, March 2026.
Abstract The influence of pretreatment of rice bran oil using fluorescent and sunlight radiations on its colour and their influence on its chemical composition and oxidative stability were assessed. Rice bran oil was stored under sunlight, fluorescent light and ambient conditions for 60 days. Oil samples were collected every 15 days for analysis.
Sab Sharon Mbape, Fabrice Tonfack Djikeng, Mallampalli Sri Lakshmi Karuna, Rachapudi Badari Narayana Prasad   +3 more
wiley   +1 more source