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Title of Journal: Eur Food Res Technol

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Abbravation: European Food Research and Technology

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Springer-Verlag

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1438-2385

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Tocotrienol levels in sieving fraction extracts of

Authors: Christoph Bohnsack Waldemar Ternes Anne Büsing Astrid M Drotleff
Publish Date: 2011/01/18
Volume: 232, Issue: 4, Pages: 563-573
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Abstract

Dried brewer’s spent grain DBSG is rich in tocotrienols T3 and tocopherols T and can be used to produce a valuable oil with the serum cholesterol–lowering functions of lipidsoluble T3 The economic feasibility of extracting oil from DBSG fat 39–106 dry weight dw increases with increasing fat content of the feedstock The objective of this research was to determine whether DBSG can be separated into fractions enriched in fat and T3 by milling and sieving and to characterize the fractions from sieves of different mesh sizes 500 800 850 and 1000 μm Six different charges of DBSG were milled and sieved with different techniques ranging in scale from laboratory to industrial The oil yield of DBSG sieving fractions 500 μm was consistently low 66–1267 dw after Soxhlet extraction with 96 ethanol as were the levels of T 774–1856 mg/kg of extracted oil T3 1819–5388 mg/kg of extracted oil and protein 1438–2573 dw In contrast oil yields of DBSG sieving fractions 500 μm were higher 1298–1809 dw after Soxhlet extraction with 96 ethanol as were the concentrations of T 1886–3180 mg/kg of extracted oil T3 5168–8502 mg/kg of extracted oil and protein 2605–3330 dw Furthermore oil yields were lower 824–1239 dw after Soxhlet extraction with nhexane Milled DBSG sieving fractions 500 μm thus appear to be a suitable feedstock for economical extraction of T3rich oil and may be useful in developing markets for valueadded brewing byproductsThis work is part of the “Food Network” project funded by the Ministry for Science and Culture of Lower Saxony Germany via the Research Association of Agricultural and Nutritional Science of Lower Saxony Forschungsverbund Agrar und Ernährungswissenschaften Niedersachsen FAEN The authors wish to gratefully acknowledge Leiber GmbH Bramsche Germany the Max RubnerInstitute Department of Safety and Quality of Cereals Detmold Germany Greenfox Produktions GmbH Oldendorf/Luhe Germany and Davos Life Science Singapore for their support

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