Journal article Open Access

Towards the Properties of Different Biomass-Derived Proteins via Various Extraction Methods

Lin Du; Pablo J. Arauzo; Maria Fernanda Meza Zavala; Zebin Cao; Maciej P. Olszewski; Andrea Kruse


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    <subfield code="a">&lt;p&gt;his study selected three representative protein-rich biomass&amp;mdash;brewer&amp;rsquo;s spent grain (BSG), pasture grass (PG), and cyanobacteria (&lt;em&gt;Arthrospira platensis&lt;/em&gt;; AP) for protein extraction with different extraction methods (alkaline treatment, aqueous extraction, and subcritical water extraction). The yield, purity, molecular weight, oil&amp;ndash;water interfacial tension, and thermal stability of the obtained proteins derived from different biomass and extraction methods were comprehensively characterized and compared. In the view of protein yield and purity, alkaline treatment was found optimal for BSG (21.4 and 60.2 wt.%, respectively) and AP (55.5 and 68.8 wt.%, respectively). With the decreased oil&amp;ndash;water interfacial tension, the proteins from all biomass showed the potential to be emulsifier. BSG and AP protein obtained with chemical treatment presented excellent thermal stability. As a novel method, subcritical water extraction is promising in recovering protein from all three biomass with the comparable yield and purity as alkaline treatment. Furthermore, the hydrolyzed protein with lower molecular weight by subcritical water could promote its functions of foaming and emulsifying.&lt;/p&gt;</subfield>
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    <subfield code="u">University of Hohenheim</subfield>
    <subfield code="a">Zebin Cao</subfield>
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    <subfield code="u">University of Hohenheim</subfield>
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    <subfield code="a">lignocellulosic biomass</subfield>
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