Thermal and quality evaluation of vegetable oils used in ruminant feed

Medeiros, Ertha Janine Lacerda de; Queiroga, Rita de Cássia Ramos do Egypto; Souza, A. G.; Cordeiro, Angela Maria Tribuzy de M.; Medeiros, Ariosvaldo Nunes de; Souza, Darklê Luiza de; Madruga, Marta Suely

doi:10.1007/s10973-012-2653-3

Cited by 19 publications

(13 citation statements)

References 24 publications

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“…The most abundant fatty acid found was linoleic acid (53.56%), followed by oleic acid (17.78%). Similar results were observed by Medeiros et al [ 26 ] and Santos et al [ 31 ] in faveleira oil. Linoleic acid is the most abundant fatty acid of well-established vegetable oils found in the market such as soy, sunflower and corn oils [ 30 ].…”

Section: Resultssupporting

confidence: 91%

“…Table 1 shows results from physicochemical properties of faveleira oil analysis. The acidity and peroxide values were inferior than faveleira (4.33% in oleic acid and 6.99 mEq/1000g, respectively) [ 26 ] and hemp seed oils (0.89% in oleic acid and 1.94 mEq/1000g, respectively) [ 27 ] previously reported. These parameters are indicators of hydrolytic and oxidative rancidity and lower values indicate better quality oil.…”

Section: Resultsmentioning

confidence: 99%

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Bioactive properties of faveleira (Cnidoscolus quercifolius) seeds, oil and press cake obtained during oilseed processing

et al. 2017

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To the best of our knowledge, this is the first report in the literature concerning the bioactive properties of faveleira products. This work focuses on the physicochemical evaluation of faveleira oil, as well as it investigates the bioactive properties of faveleira seeds, faveleira oil and the press cake obtained during the oilseed processing. The seeds were cold pressed and the following tests were performed: physicochemical characteristics (acidity, peroxide values, moisture and volatile matter, density and viscosity) and fatty acid profile of faveleira oil; total phenolic and flavonoid content of faveleira seed and press cake; antibacterial activity of seed, oil and press cake; and antioxidant activity (DPPH radical scavenging activity, reducing power assay, total antioxidant capacity, superoxide radical scavenging assay and oxygen radical absorbance capacity) of seed, oil and press cake. Our work demonstrated that the faveleira seed oil has low acidity (0.78 ± 0.03% oleic acid) and peroxide value (1.13 ± 0.12 mEq/1000g), associated with the relevant concentration of linoleic acid (53.56%). It was observed that important phenolics (398.89 ± 6.34 mg EAG/100 g), especially flavonoids (29.81 ± 0.71 mg RE/g) remain in the press cake, which indicates that the by-product of the faveleira oilseed production constitutes a rich residual source of bioactive compounds. No bacterial growth inhibition was detected, but all samples including faveleira seeds, press cake, oil and its fractions have potent antioxidant activities, mainly the press cake, with oxygen radical absorbance capacity of 28.39 ± 4.36 μM TE/g. Our results also show that faveleira oil has potential to be used as edible oil and the press cake should be used to contain the most antioxidants from seed.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Bioactive properties of faveleira (Cnidoscolus quercifolius) seeds, oil and press cake obtained during oilseed processing

et al. 2017

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“…In addition, the stability and humectant properties make it useful for the industrial production of soaps, cosmetics, resins, and cleaning materials [13,14]. It has been suggested that the predominant fatty acid of this oil (lauric acid) also has antimicrobial activity and stimulates the immune system [15].…”

Section: Resultsmentioning

confidence: 99%

Thermal behavior and chromatographic characterization of oil extracted from the nut of the Butia (Butia capitata)

Kobelnik

Fontanari

Marques

et al. 2016

J Therm Anal Calorim

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The Butia capitata (Arecaceae family) is a palm that can reach approximately from 3 feet up to 5 feet tall and is commonly found in southern Brazil. This palm produces bunches of fruit with a diameter of about 2 cm which has an acid taste and is enjoyed by many people and also wild animals such as rodents and birds. The aim of this study was to extract the oil present in butia nuts and evaluate its composition and thermal behavior. The oil was characterized by chromatography and its thermal behavior by thermogravimetry (TG) in nitrogen and oxygen atmospheres under different heating rates. The chromatographic profile of this oil reveals a predominance of saturated fatty acids. The analysis performed by thermogravimetry indicates that under oxygen atmosphere, this oil showed mass gain before the onset temperature of thermal decomposition. In nitrogen, only one mass loss was observed. The kinetic behavior showed the relationship between the uses of two sample masses, indicating the same kinetic behavior under oxygen analysis.

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“…The dTG curve for CO [Figure (b)] showed two stages of weight loss related to the decomposition of fatty acid esters, which was predominated by ricinoleic acid. The first stage is characterized by an intense peak between 200°C and 428°C, with a maximum at 380°C and weight loss of approximately 74%, which can be attributed to the volatilization/decomposition of ricinoleic acid . The second stage is characterized by a low intensity peak between 428°C and 530°C, with a maximum at 455°C and a weight loss of approximately 22%.…”

Section: Resultsmentioning

confidence: 99%

Processing and thermal properties of composites based on recycled PET, sisal fibers, and renewable plasticizers

Santos

Castro

Rúvolo-Filho

et al. 2014

J of Applied Polymer Sci

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This investigation focuses on the preparation of bio‐based composites from recycled poly (ethylene terephthalate) (PET) and sisal fibers (3 cm, 15 wt %), via thermopressing process. Plasticizers derived from renewable raw materials are used, namely, glycerol, tributyl citrate (TBC) and castor oil (CO), to decrease the melting point of the recycled PET (Tm ∼ 265°C), which is sufficiently high to initiate the thermal decomposition of the lignocellulosic fiber. All used materials are characterized by thermogravimetric analysis and differential scanning calorimetry, and the composites are also characterized via dynamic mechanical thermal analysis. The storage modulus (30°C) and the tan δ peak values of CT [PET/sisal/TBC] indicate that TBC also acts as a compatibilizing agent at the interface fiber/PET, as well as a plasticizer. To compare different processing methods, rheometry/thermopressing and compression molding are used to prepare the recycled PET/sisal/glycerol/CO composites. These two different methods of processing show no significant influence on the thermal properties of these composites. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40386.

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Thermal and quality evaluation of vegetable oils used in ruminant feed

Cited by 19 publications

References 24 publications

Bioactive properties of faveleira (Cnidoscolus quercifolius) seeds, oil and press cake obtained during oilseed processing

Bioactive properties of faveleira (Cnidoscolus quercifolius) seeds, oil and press cake obtained during oilseed processing

Thermal behavior and chromatographic characterization of oil extracted from the nut of the Butia (Butia capitata)

Processing and thermal properties of composites based on recycled PET, sisal fibers, and renewable plasticizers

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