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: 3.26). 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.

Download full-text


Available from: B. Dave Oomah, Apr 10, 2014
  • Source
    [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 · 2.03 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Studies were conducted on properties of seeds and oil extracted from fully ripened Phoenix canariensis date seeds. The percentage composition of the P. canariensis seeds found is: ash 1.18%, oil 10.36%, protein content 5.67%, total carbohydrate 72.59% and moisture 10.20%. The major nutrients (mg/100 g of oil) determined were: potassium (255.43), magnesium (62.78), calcium (48.56) and phosphorus (41.33). The physicochemical properties of the oil observed include: the saponification number 191.28; the iodine number 76.66, the p-anisidine value 3.67; the peroxide value 3.62 meq/kg; the unsaponifiable matter content 1.79%, the free fatty acids content 0.59%; the carotenoid content 5.51 mg/100 g; the chlorophyll content 0.10 mg/100 g and the refractive index 1.45. The main fatty acids of oil were oleic (50.10%), linoleic (19.23%), lauric (10.24%). palmitic (9.83%) and stearic (7.51%). The main triacylglycerols found in P. canariensis seed oil were: LaMM + LaLaP (18.9%), LaMP + MMM (15.31%) and LaOO + PLL + MPL (12.86%). The DSC melting curves revealed that: melting point = 3.71 °C and melting enthalpy = 62.08 J/g. The sterol marker, β-sitosterol, accounted for 76.06% of the total sterols content in the seed oil followed by campesterol (8.89%) and Δ5avenesterol (8.79%). α-Tocotrienol was the major tocol (66%) with the rest being γ-tocotrienol and γ-tocopherol.
    Industrial Crops and Products 11/2010; 32(3):360-365. DOI:10.1016/j.indcrop.2010.05.016 · 2.84 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Heavy metal contamination of agricultural soils and subsequent accumulation of these metals in plants is a growing interest. In this work heavy metal and selected micronutrient content (Cd, B, Al, Co, Cu, Mo, Ni, Zn, Fe, Mn, Pb and Cr) in twenty -one different hempseed samples collected from North - western Turkey was monitored. The quantitative measurements were carried out with inductively - coupled plasma (ICP-OES). The content of Pb and Cr was below the detectable levels in all the seed samples. Cadmium content of the hempseeds was found within the range of 5 - 23 μ μ μ μgkg -1 . Of the monitored trace elements, the highest concentration found was of iron (98 -121