نتایج جستجو برای: rancimat method
تعداد نتایج: 1630161 فیلتر نتایج به سال:
The aim of this study was to determine the chemical composition (fatty acids, tocopherols, and sterols) evaluate oxidative stability Moroccan pomegranate ( Punica granatum L.) seed oil. oil content 22.63 g/100g dry weight. fatty acid showed a dominance conjugated linolenic acids (CLnAs) (86.96 g/100g). most dominant punicic (75.1 g/100g), followed by catalpic (6.7 g/100g) linoleic with amounts ...
The use of natural additives in biodiesel has been investigated, however, there is limited information the literature relation to their influence on corrosion resistance and oxidative stability. This work aims investigate stability carbon steel (AISI 1020) contact with soybean solutions (B100) presence absence such as: rosmarinic acid, curcumin, gingerol, eugenol, thymol quercetin. Corrosion mi...
Two Marula, Sclerocarya birrea seed samples originating from Western Sudan, were analyzed, and the characteristics and constituents of the kernel oils were determined, including physico-chemical properties, specific gravity, oil colour, refractive index, saponification value, unsaponifiable matter, acid value, free fatty acids, and phosphorus content. Total fatty acid compostion was determined ...
This study was carried outto investigate the effect of ultrasound-assisted extraction (UAE) on polyphenols from olive pomace with methanol (80%) as an extracting medium and studythe effects of addingthe extract to refined sunflower oilduring accelerated oxidationconditions. Ahigh amount of polyphenols was extracted from the olive pomace with a solvent-to-solid ratio of 40 at 50% of the maximum ...
The aim of this research was to assess the physico-chemical properties and shelf-life oils press-extracted at two temperatures (60 °C 80 °C) from five Peruvian castor bean ecotypes. A wide variation for all traits observed. Low acidity index, low peroxide index absence p-anisidine were recorded. total tocopherol contents ranged 798 1040 mg/kg. higher antioxidant capacity detected in methanolic ...
abstract part one: the electrode oxidation potentials of a series of eighteen n-hydroxy compounds in aqueous solution were calculated based on a proper thermodynamic cycle. the dft method at the level of b3lyp-6-31g(d,p) was used to calculate the gas-phase free energy differences ,and the polarizable continuum model (pcm) was applied to describe the solvent and its interaction with n-hydroxy ...
Industrial processes that apply high temperatures in the presence of oxygen may compromise the stability of conjugated linoleic acid (CLA) bioactive isomers. Statistical techniques are used in this study to model and predict, on a laboratory scale, the oxidative behaviour of oil with high CLA content, controlling the limiting factors of food processing. This modelling aims to estimate the impac...
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