Valorizacija sojine sačme za proizvodnju visokoproteinske stočne hrane i proizvoda sa dodatom vrednošću korišćenjem novog soja Aureobasidium pullulans Original scientific paper
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Sojina sačma je nusproizvod koji nastaje nakon ekstrakcije ulja iz zrna soje. S obzirom na to da je bogata visokokvalitetnim proteinima, sojina sačma se koristi kao dodatak za stočnu hranu. Međutim, bogata je takođe i antinutritivnim faktorima i nesvarljivim komponentama, među kojima je posebna pažnja usmerena na galaktooligosaharide, zbog nedostatka α-galaktozidaze kod monogastričnih životinja. Osnovni cilj ovog istraživanja bio je da se odabere pogodan soj crne gljivice nalik kvascu (Aureobasidium spp.) među deset prirodnih izolata iz grožđa, koji bi tokom fermentacije sojine sačme dao proizvod sa velikim sadržajem proteina i malim sadržajem oligosaharida. Sa tim ciljem odabran je izolat P8 koji je pokazao najveću aktivnost α-galaktozidaze od 0,89 U cm-3. Odabrani soj je identifikovan kao A. pullulans P8. Maksimalni prinos sirovih proteina u fermentisanoj sojinoj sačmi (61 % računato na suvu materiju) i najmanji sadržaj galaktooligosaharida dobijeni su nakon 3 dana inkubacije na 30 °C potopnom fermentacijom pri sadržaju 10 % suve materije sojine sačme. Fermentacijom na čvrstom supstratu dobijeno je ~58 % sirovih proteina nakon 7 dana inkubacije na 30 °C pri sadržaju suve materije od 30 %. U supernatantu dobijenom nakon potopne fermentacije izmerene su aktivnosti ekstracelularnih enzima (celulaze, pektinaze, amilaze, ksilanaze i α-galaktozidaze), što ukazuje na potencijal ovog pomoćnog proizvoda za hidrolizu različitih lignoceluloznih supstrata.
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Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja
Grant numbers 451-03-65/2024-03/200135;451-03-66/2024-03/200287 -
Innovation Fund of the Republic of Serbia
Grant numbers Voucher number 1076
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