Physicochemical assessment and bioactive properties of condensed distillers solubles,a by-product from the sorghum bio-fuel industry |
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| Institution: | 1. Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Queensland, Australia;2. Centre for Food Innovation, The University of Tasmania, Tasmania, Australia;1. School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China;2. Department of Physics and Chemistry, Heihe University, Heihe 164300, China;1. Department of Chemical Engineering, Hanyang University, Haengdang-dong, Seongdong-gu, Seoul, 04763, South Korea;2. Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, South Korea;1. Laboratoire Charles Coulomb (L2C), Univ. Montpellier, CNRS, Montpellier, France;2. UMR IATE 1206, Univ.Montpellier, CIRAD, INRA, SupAgro, Montpellier, France;1. Key Laboratory of Marine Environment and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;2. School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China;1. Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki, Kanagawa 210-8681, Japan;2. Department of Microbial Resources, Department of Microbial Biotechnology, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 981-8555, Japan;3. Laboratory of Applied Microbiology, Department of Microbial Biotechnology, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 981-8555, Japan;4. Microbial Genomics Laboratory, New Industry Creation Hatchery Center, Tohoku University, Sendai, Miyagi 980-8579, Japan |
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| Abstract: | Large volumes of condensed distillers solubles (CDS) are generated as by-products, from the sorghum bioethanol industry. The objective was to assess the physico-chemical and bioactive properties of CDS. The unfractionated CDS showed the highest content of phenolic compounds (16 mg GAE/g), antioxidant (522 μM Trolox/g) and antimicrobial activity (MIC 1%(w/v) against Campylobacter spp.) compared to its extracts. The water and methanol extracts also showed high levels of phenolic compounds and antioxidant activity (11.6 and 9.2 mg GAE/g and 349 and 409 μM Trolox/g respectively), followed by ethanol and acetone extractions (7.5 and 6.6 mg GAE/g; 337 and 346 μM Trolox/g respectively). A positive correlation was revealed between total phenol and antioxidant activity. The main phenolic compounds found in the extracts were protocatechuic acid, 4-hydroxybenzoic acid, taxifolin, ferulic acid, cinnamic acid and p-coumaric acid. This study indicates the potential of using CDS as a functional ingredient for other food and feed applications. |
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| Keywords: | Condensed distillers solubles Cereal by-products Phytochemicals Bioactive properties |
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