The oxidative stability of mixtures of edible oils containing polyunsaturated fatty acids (PUFA) and microcrystalline cellulose (MCC) was investigated. The mixtures studied consisted of oils of ...either camelina (CAM), cod liver (CLO), or salmon (SO) mixed with either colloidal or powdered MCC. A 50:50 (w/w) ratio of oil:MCC resulted in an applicable mixture containing high levels of PUFA edible oil and dietary fiber. The oxidative stability of the formulated mixtures and the pure oils was investigated over a period of 28 days. The peroxide value (PV) was assessed as a parameter for primary oxidation products and dynamic headspace gas chromatography mass spectrometry (GC/MS) was used to analyze secondary volatile organic compounds (VOC). CAM and the respective mixtures were oxidatively stable at both 4 and 22 °C during the storage period. The marine oils and the respective mixtures were stable at 4 °C. At 22 °C, an increase in hydroperoxides was found, but no increase in VOC was detected during the time-frame investigated. At 42 °C, prominent increases in PV and VOC were found for all oils and mixtures. Hexanal, a common marker for the degradation of n-6 fatty acids, propanal and 2,4-heptadienal (E,E), common indicators for the degradation of n-3 fatty acids, were among the volatiles detected in the headspace of oils and mixtures. This study showed that a mixture containing a 50:50 ratio of oil:MCC can be obtained by a low-tech procedure that does not induce oxidation when stored at low temperatures during a period of 1 month.
Camelina oil was found to have a much lower Oil Stability Index and higher p-anisidine rates in the oven storage test than either rapeseed or sunflower oils. Stabilization of camelina oil was ...evaluated with 21 food grade synthetic and natural antioxidants and antioxidant formulations, using both the Oil Stability Index (OSI) and the oven storage test. The Oil Stability Index of camelina oil was able to be increased above that of rapeseed oil with TBHQ and its formulation with citric acid, and above that of sunflower oil with EGC, EGCG, carnosic acid, propyl gallate, rosemary extract with ascorbyl palmitate or with gallic acid. para-Hydroxyphenols were found to be more effective than ortho-hydroxyphenols and monohydroxyphenols had no significant effect on the OSI. Good correlation (R 2 = 0.96) was found between the stabilizing effect of ortho-hydroxyphenols and the molarity of the phenyl hydroxyl groups per weight of antioxidant. The oven storage test carried out with six of the evaluated antioxidants indicated that p-anisidine rates of camelina oil stabilized with commercial formulations of TBHQ with citric acid or rosemary extract with ascorbyl palmitate were about the same as that of sunflower oil, an almost 90% rate reduction when compared to camelina oil. Accordingly, camelina oils stabilized with TBHQ/citric acid and rosemary extract/ascorbyl palmitate formulations were more stable than rapeseed and sunflower oils, respectively in terms of OSI induction times and p-anisidine rates.
Oil-seed crop: Camelina sativa Zubr, Josef
Industrial crops and products,
05/1997, Letnik:
6, Številka:
2
Journal Article
Recenzirano
False flax and gold of pleasure are the popular names for
Camelina sativa (L.) Crantz. Seeds and capsules of
Camelina sativa ssp.
C. linicola (Schimp. and Spenn.), have been found in archaeological ...excavations from the Bronze Age in Scandinavia and Western Europe.
C. sativa was grown as an agricultural crop in European countries and Russia before the Second World War and up to the fifties. The recent search for new sources of essential fatty acids, particularly OMEGA-3 fatty acids, led to a renewed interest in this crop.
C. sativa seed consists of about 43% oil in dry matter. The content of unsaturated fatty acids in the oil is about 90%. About 50% of the total fatty acids are polyunsaturated-linoleic acid (18:2
n− 6) and α-linolenic acid (18:3
n− 3). The content of erucic acid (22:1
n − 9) in the oil is about 3.0%. The content of tocopherols is about 700 mg/kg. The cultivation of the crop is characterized by a low input. Nitrogen demand is moderate to low and chemical plant protection is not needed. Under experimental conditions, the yield of seed amounted to 2.6 and 3.3 t DM/ha, obtained from summer and winter varieties, respectively. The environmental benefits of the crop and a multipurpose applicability of the oil make
C. sativa a promising oil-seed crop.
Oxidative stability of omega-3 rich camelina oil in food products and during frying was evaluated and compared with sunflower oil. Camelina oil-based salad dressings were of similar oxidative ...stability to those prepared with sunflower oil, as indicated by predominantly insignificant (P > 0.05) differences in peroxide values (PV), ρ-anisidine values (AV), total oxidation values (TOTOX), conjugated diene levels (CD) and conjugated triene levels (CT). However, thiobarbituric acid reactive substances (TBARS) were significantly higher (P < 0.05) for camelina oil and salad dressings throughout storage. Camelina and sunflower oils, alone and in salad dressings or mayonnaises, were acceptable to a sensory analysis panel with slightly lower scores for camelina oil. PV, AV and TOTOX values were similar for camelina and sunflower oil during deep frying but while PVs remained low (<10 meq kg⁻¹), AV and TOTOX values increased quickly. TBARS values were significantly higher in deep-frying camelina oil and 'fishy' odours were observed.
The effects of dietary supplementation with camelina oil on porcine plasma fatty acid composition and on serum cholesterol/triglyceride concentrations were investigated and compared with the effects ...of fish oil. The diets consisted of a control diet and diets supplemented with 5% camelina oil, 10% camelina oil and 5% fish oil. The camelina and fish‐oil diets increased plasma ω3 fatty acids and reduced plasma ω6 fatty acids. Plasma eicosapentaenoic acid (C20:5ω3, EPA) was increased more by the fish oils diet than the camelina‐oil diets. Serum triglyceride levels were reduced by the camelina‐oil diets.
Crambe oil and camelina oil were transesterified with oleyl alcohol, the alcohols derived from crambe and camelina oils, n‐octanol or isopropanol using Novozym 435 (immobilized lipase B from Candida ...antarctica), Lipozyme IM (immobilized lipase from Rhizomucor miehei), and papaya (Carica papaya) latex lipase as biocatalysts. The highest conversions to alkyl esters were obtained with Novozym 435 (up to 95%) in most cases, whereas Lipozyme IM and papaya latex lipase gave lower (40 to 50%) conversions. The conversions with long‐chain alcohols (oleyl alcohol, crambe alcohols, and camelina alcohols) were higher (40 to 95%) than with medium‐chain n‐octanol (30 to 85%). Isopropyl esters of crambe oil and camelina oil were obtained with rather low conversions using Novozym 435 (<40%) and Lipozyme IM (about 10%) as biocatalysts, whereas with papaya latex lipase no isopropyl esters were formed. The conversions of crambe oil and camelina oil to oleyl and n‐octyl esters using Novozym 435 as biocatalyst were hardly affected by the ratio of the substrates, but with Lipozyme IM the conversions to alkyl esters distinctly increased with an excess of alcohol substrate
The alcoholysis of crambe and camelina oils was carried out with oleyl alcohol, alcohols derived from crambe and camelina oils, and n‐octanol using potassium hydroxide as catalyst to prepare alkyl ...esters. Conversions to alkyl esters were about 0% with oleyl alcohol, 20–45% with crambe and camelina alcohols, and 60% with n‐octanol. The conversion to esters for crambe and camelina oil with oleyl alcohol and n‐octanol increased with increasing molar excess of alcohol. Composition of the alkyl esters formed was as expected from the composition of the reaction partners.
Epoxidation of Camelina sativa oil and peel adhesion properties Kim, Namhoon; Yonghui LiauthorDepartment of Grain Science and Industry, Biomaterials and Technology Lab, Kansas State University, Manhattan, KS, USA; Xiuzhi Susan Sunauthor
2015
Journal Article
Technoeconomic analysis of small-scale farmer-owned Camelina oil extraction as feedstock for biodiesel production: A case study in the Canadian prairies Mupondwa, Edmund; Xue LiauthorBioproducts and Bioprocesses, Science and Technology Branch, Agriculture and Agri-Food Canada (AAFC), Government of Canada, Saskatoon Research and Development Centre, 107 Science Place, Saskatoon, SK, S7N 0X2, Canada; Kevin FalkauthorOilseed and Mustard Breeding, Sustainable Production Systems, Science and Technology Branch, AAFC, Government of Canada, Saskatoon Research and Development Centre, 107 Science Place, Saskatoon, SK, S7N 0X2, Canada ...
2015
Journal Article
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