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. (2007): The impact of plant breeding on the seed oil content and quality in evening primrose crops. pp. 29–36. In: Proceedings of the Joint International Conference on Long-term Experiments, Agricultural Research and Natural Resources; Debrecen

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Bócsa, I., Finta-Korpeľová, Z., Máthé, P. (2005): Preliminary results of selection for seed oil content in hemp ( Cannabis sativa L.). J. Indust. Hemp , 10 , 5

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calcareous chernozem soil. Commun. Soil Sci. Plant Analysis. 40. 825–834. Panford, J. A. & deMan, J. M., 1990. Determination of oil content of seeds by NIR: Influence of fatty acid composition on wavelength selection

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The etheric oil components in garlic are proven to have numerous positive effects on human health, and powdered garlic has long been widely used in both the food industry and private households. In order to prolong the stability of etheric oil components, different combinations of packaging materials are used for the storage of powdered garlic. Since the quality of dehydrated powder depends on the packaging used, the investigation was aimed to determine the effects of packaging material types on etheric oil content in industrially powdered garlic over the storage period. Powdered samples were analysed immediately after production and during long periods of storage (after 30, 90, 120, 180 and 270 days). The investigations were focused on the correlation between packaging materials performances (light, water vapour and air permeability), and the changes of etheric oil and moisture content in powdered garlic. In order to describe the changes in etheric oil content during time, as well as to predict changes in packed powdered garlic, a statistical procedure was applied for all examined packaging materials and curve fitting data were estimated (the least square approach).

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420 Zsombik L.: (2006).: Effect of sowing time on the oil content of different sunflower hybrids. Cereal Research Communications 34,1. 725

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sulphur nutrition on seed yields and oil content in winter rape. Acta Agr. et Silv., S. Agr. , 2 , 265–270. Lošák T. Effects of nitrogen and sulphur nutrition on seed yields and oil

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. 15. Szabó , A. — Pepó , P. : 2007 . Effect of plant density on yield and oil content of different sunflower genotypes . Cereal Res. Commun. 35 . 2 : 1121 – 1124 . 16

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The milk thistle plant grows in many regions in Tunisia; however, there is no literature regarding their oil composition. In this study, oil content, fatty acids and triacylglycerols compositions of milk thistle seeds growing wild in Tunisia were determined. The oil content was 30.5%, thus milk thistle seeds could be exploited as natural new source of oil. Among the fatty acids, linoleic acid had the highest percentage (59.98%) followed by oleic acid (21.26%) and palmitic acid (12.74%). The extracted oil from milk thistle seeds is rich in polyunsaturated fatty acids (60.37%). Various molecular species of TAGs were detected and the major forms were LLL (22.30%), OLL (20.40%), PLL (17.31%), POL (14.30%), and OOL (7.90%). It can be concluded that milk thistle seed oil has a characteristic TAG pattern as compared with these elucidated for olive oil and soybean oil.

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