Abstract
The objectives of this experiment were to use non-invasive and non-destructive infrared molecular spectroscopy as a novel approach to explore and identify protein and carbohydrate molecular structure spectral features of DDGS (dried distillers grain solubles from wheat,Triticum aestivum) and its combinations with barley (Hordeum vulgare), corn (Zea mays) and oat (Avena sativa). The spectral parameters assessed in this study included amides, protein molecular structures ofα-helix andβ-sheet, lignin, cellulosic compounds (CeC) and nonstructural carbohydrates (NSC). The results of the study show that the combinations of DDGS with cereal grains significantly changed (P< 0.05) protein and carbohydrate structures and protein secondary structure. The use of FT/IR molecular spectroscopy in terms of identification of inherent structural changes was remarkable. The combination of DGGS with different grains alters the constituents and intrinsic molecular structures. This change would improve the nutritional quality and digestive characteristics of the feed. Further studies are recommended to evaluate the effect on digestibility, availability and its structural correlation.
Highlights
IntroductionA new co-products from bioethanol processing is wheat (Triticum aestivum) dried distillers grains with solubles (wheat dried distillers grain solubles (DDGS)) produced in North America [17]
A new co-products from bioethanol processing is wheat (Triticum aestivum) dried distillers grains with solubles produced in North America [17]
Wheat dried distillers grain solubles (DDGS) were obtained from two bioethanol processing plants (Terra Grain Fuels, Regina, and North West BioEnergy, Unity) in Saskatchewan, Canada
Summary
A new co-products from bioethanol processing is wheat (Triticum aestivum) dried distillers grains with solubles (wheat DDGS) produced in North America [17]. The nutritive value of dried distillers grain solubles (DDGS) from wheat after ethanol production, makes them an excellent source of protein and energy for dairy and beef cattle [17,18,19]. Subsequent to the process of bioethanol production, ethanol fermentation utilizes most of the starch from grain kernels concentrates the remaining components, mainly protein, fiber, fat and minerals into DDGS [37]. High content of lignin (ADL, 43 g/kg) reported by Nuez-Ortin and Yu [17] may lead its nutritional value low It contains high protein, fat and fibre and low starch [12], DDGS were reported to be slow in degradability and digestibility in rumen because ready available fermentable fractions were already
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