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The paper presents problems of the sustainable consumption. The study focused on an example product, i.e. vegetable oils. One of the elements ensuring sustainable consumption is connected with the development of proper consumption patterns. It is a complex issue, since it requires multifaceted interdisciplinary studies. The starting point for their development is provided by the characteristics of profi les of vegetable oil consumers in Poland in a view of sustainable consumption principles. This study is based on the results of national survey. Recorded results may be useful also when preparing public awareness campaigns concerning sustainable consumption.
The aim of this work was to evaluate the physical properties of oils from winter rape, pumpkin and grape seeds in order to assess their potential as a source of functional oils. Seeds were analysed for water content, protein and fat. All the seeds met minimum requirements for technological quality. The effect of cold oil extraction on chemical compounds was studied in oils pressed from the above seeds. The properties of the oils were compared based on the lipid profiles, content of carotenoids, chlorophylls and tocopherols. The oxidation stability of the oils was estimated through the determination of the acid number, peroxide number and oxidation induction time.
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Tocopherol content in edible plant oils

75%
Edible vegetable oils were analysed for tocopherols by reversed-phase HPLC. These included refined corn, soybean, sunflower, rapeseed, grapeseed, and peanut oils, and cold-pressed extra-virgin olive, linseed, rapeseed, and sunflower oils. Total measured tocopherol concentrations varied in the range from 121 to 829 mg/kg. The contents of individual α-, (β+γ)-, and δ-tocopherols show a great diversity depending on the kind of oil. Moreover, the effect of photooxidation on the tocopherol content was studied in cold-pressed sunflower and rapeseed oils. These studies revealed only a minor decomposition of tocopherols under visible light.
This publication presents the results of research concerning an improvement of low-temperature properties of HVO paraffinic biocomponents by utilizing zeoformed waste natural oils. The process was performed using a special zeolite catalyst based on the hydrogen form of the ZSM-5 zeolites. This method is generally recognized as a new approach for obtaining low-temperature performance improvements of the HVO biocomponents.
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