Characteristic 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


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.

Download full-text


Available from: B. Dave Oomah, Apr 10, 2014
482 Reads
  • Source
    • "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). "
    [Show abstract] [Hide abstract]
    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
    • "Hemp oil typically contains less than 10 % saturated fatty acids, and no trans-fatty acids, which are particularly detrimental to blood cholesterol balance. Within hemp seed oil, γ-tocopherol is present in significantly higher amount than α-tocopherol (Deferne and Pate 1996; Oomah et al. 2002). Both these tocopherols are important fat-soluble antioxidants. "
    [Show abstract] [Hide abstract]
    ABSTRACT: Ultrasound pre-treatment of intact hemp seeds without any solvent assistance was carried out for 10, 20 and 40 min prior to SCCO2 extraction at 40 °C, 300 bar and 45 kg CO2/kg feed. Sonication time effect on SC-CO2 extraction was investigated by the extraction kinetics. The maximum extraction yield was estimated to be 24.03 (% w/w) after 10 min of ultrasonic pre-treatment. The fatty acid compositions of the oils extracted by SC-CO2 without and with ultrasound pre-treatments was analyzed using gas chromatography. It was shown that the content of linoleic, α-linolenic and oleic acids (the most abundant unsaturated fatty acids) of the hemp seed oils were not affected significantly by the application of ultrasound. UV spectroscopy indices (K232 and K268) and antiradical capacity were used to follow the quality of oils. Significant were the changes in their antiradical capacity due to ultrasound treatment. A comparison with the oil extracted by Soxhlet was also given.
    Journal of Food Science and Technology -Mysore- 03/2015; 52(3):1748-53. DOI:10.1007/s13197-013-1143-3 · 2.20 Impact Factor
  • Source
    • "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]. "
    [Show abstract] [Hide abstract]
    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 · 1.81 Impact Factor
Show more