Characteristics of hemp (Cannabis sativa L.) seed oil

Food Research Program, Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, Summerland, British Columbia V0H 1Z0, Canada
Food Chemistry (Impact Factor: 3.39). 01/2002; 76(1):33-43. DOI: 10.1016/S0308-8146(01)00245-X

ABSTRACT Characteristics of oil extracted from hempseeds subjected to microwave treatments were evaluated. Microwave treatment improved oil yield, increased carotenoid and other pigment contents and decreased p-anisidine value without significant changes in other properties. Hempseed oil showed absorbance in the UV-B and UV-C ranges with potential for use as a broad spectrum UV protectant. [beta]-Tocopherol concentrations increased, while the major tocopherol, [gamma]-tocopherol, and fatty acid composition of the oil were unaffected by microwave treatment of hempseed. Hempseed oil showed high kinetic stability during heating and cooling, as characterized by differential scanning calorimetry (DSC). Microwave treatment shifted the melting range of oils to lower temperatures and increased oxidation temperatures, suggesting increased protective effect upon heating.

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Available from: B. Dave Oomah, Apr 10, 2014
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    • "Hemp is certainly a multifunctional plant and the most important products which can be produced from hemp are: oil, proteins, which can be used in food and feed production, and fibers used in the paper and textile industry (Callaway, 2004; Bertoli et al., 2010). Hemp seeds are high value with approximately 25–35% lipids, 20–25% proteins, 20–30% carbohydrate , 10–15% insoluble fibers and numerous of natural source minerals (Oomah et al., 2002; Deferne and Pate, 1996). "
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    ABSTRACT: tIn this work, hemp (Cannabis sativa L.) seed oil was produced by extraction with supercritical CO2underdifferent extraction conditions (temperature, pressure and time). The objective was to evaluate the influ-ence of extraction conditions on concentration of tocopherols, fatty acids and pigments in hemp seed oil.The composition of hemp seed oil obtained with supercritical CO2was compared with the hemp oilextracted by n-hexane using Soxhlet method and with oil obtained by pressing using screw expeller.Using supercritical CO2extraction the extracts higher in concentration of tocopherol were produced.The amount of �- tocopherol in supercritical extracts ranged from 37.09 to 110.61 mg L−1, dependingon the applied process conditions, while �-tocopherol content was significantly higher (2–3 times). Thecontent of pigments in the hemp oil obtained by supercritical CO2had been changed significantly duringthe extraction time from 9.79 to 178.76 mg kg−1for total chlorophyll content and 8.15 to 57.66 mg kg−1for total carotene content. By selecting the relevant process conditions of supercritical extraction it ispossible to obtain hemp seed oil with physical or nutritional properties of interest to the food industry.
    Industrial Crops and Products 12/2015; 76:472-478. DOI:10.1016/j.indcrop.2015.07.016 · 2.84 Impact Factor
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    • "Amaranth oil has antioxidant and hepatoprotective activities [28] [29], can lower cholesterol in animal models owing to its rich content of PUFA and Squalene, being an effective remedy for coronary heart disease and hypertension [30]. Hempseed provides a well‐ balanced and rich source of dietary omega‐6 and ‐3 EFA and appears to be a valuable source of food [31] [32]. Hempseed has unique nutritional properties and has commonly been claimed to be one of the most nutritionally complete foods [33]. "
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    ABSTRACT: The vegetable oils and extracts known for their beneficial effects should be identified and used in various forms for the development of new healthy products. This study was designed to provide further investigation on new nanocarriers made with Hempseed oil or a blend of Amaranth and Hempseed oils, for a concomitant encapsulation and release of the carotenoids enriched plant extract. The size of plant extract loaded – lipid nanocarriers ranging between 109 and 130 nm was found to be less influenced by the different ratios of Hempseed and Amaranth oils. For all of the synthesized nanocarriers, zeta potential values were negative (−33.4 ÷ −38.1 mV). The scanning calorimetry study has shown that lipid nanocarriers have favorable lattice defects for plant extract encapsulation. Entrapment efficiency results revealed an increase of carotenoids entrapment from 57.6% to 83.5% as the Amaranth oil percent has been increased. High ability to scavenge the free oxygenated radicals was distinguished for all free- and loaded – nanocarriers. The level of antioxidant activity increase was proportional with the extent of vegetable oil and was ranging between 93.4 and 98.1%. The nanocarriers made with Amaranth and Hempseed oils have shown a more sustained release over time than those prepared with Hempseed oil only in association with solid lipids.Practical applications: The applicability of lipophilic plant extracts enriched in bioactive compounds encounters serious problems in the food and pharmaceutical sector due to its poor bioavailability. Using the concept of exploiting natural resources in combination with soft nanotechnology, valuable bioactive vegetable mixtures could be formulated into solid colloidal nanoparticles. The bioavailability and the therapeutic benefit of Hempseed and Amaranth oils in association with lipophilic plant extract enriched in carotenoids are increased by incorporation into the same nanostructured formulation. These formulations result in unique precursors of health products, particularly for nutraceutical industry. The lipid nanocarriers based on natural compounds offer potential applications as natural, low cost and innovative delivery systems to improve quality and extend shelf-life of food products. The developed vegetable based lipid nanocarriers offer advantages of a minimum carrier cytotoxicity, good storage stability, synergistic effects, antioxidant and sustained release benefices, easy to scale up production.
    European Journal of Lipid Science and Technology 07/2014; 116(12). DOI:10.1002/ejlt.201300488 · 2.03 Impact Factor
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    • "Terebinth and radish seed had the highest oil content (43.12 ± 0.34%, 42.64 ± 1.36%, respectively), followed by laurel seed (36.82 ± 0.36%), hemp seed (31.48 ± 1.19%) and stinging nettle seed (30.68 ± 1.78%) (P < 0.05). In a previous study concerning the hemp seed, the oil content identified and obtained ranged between 25 and 35% [4]. In the present study, the total oil content was identified as 31.48%. "
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    ABSTRACT: The oils of some unconventional oilseeds (hemp, radish, terebinth, stinging nettle, laurel) were obtained by a cold-press method in which the total oil content, fatty acids, tocopherol isomers, some metal contents (Ca, Mg, Fe, Cu), antioxidant activity and oxidative stability were determined. The total oil content was determined ranging between 30.68 and 43.12%, and the oil samples had large amounts of unsaturated fatty acids, with oleic acid and linoleic acid. Of all the oils, terebinth seed oil had the highest α-tocopherol content (102.21 ± 1.01 mg/kg oil). Laurel oilseed had the highest antiradical activity in both the DPPH and ABTS assays. The peroxide value of the non-oxidized oils ranged between 0.51 and 3.73 mequiv O(2)/kg oil. The TBARS value of the non-oxidized oils ranged between 0.68 ± 0.02 and 6.43 ± 0.48 mmol MA equiv/g oil. At 110 °C, the Rancimat induction period of the oils ranged between 1.32 and 43.44 h. The infrared spectra of the samples were recorded by FTIR spectroscopy. The absorbance values of the spectrum bands were observed and it was determined that some of the chemical groups of oxidized oils caused changes in absorbance. As a result of the present research, the analyzed oils could be evaluated as an alternative to traditionally consumed vegetable oils or as additives to them.
    Journal of Oil & Fat Industries 04/2012; 89(4):551-559. DOI:10.1007/s11746-011-1955-0 · 1.62 Impact Factor
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