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NIRS Analysis of Carbohydrates in Soybeans

Near-infrared spectrophotometry (NIRS) methods were used to screen 832 samples of soybeans for oligosaccharides and nonstarch polysaccharides. They suggested that NIRS is a suitable and rapid nondestructive method to determine carbohydrate (stachyose, raffinose, sucrose, maltose, glucose xylose, fructose maltose, nonstarch polysaccharides and uronic acid). Among the raffinose group of oligosaccharides, stachyose was predominant in the soybean samples analyzed. They found significant differences in the most low-molecular-weight carbohydrates in the soybean lines analyzed; the exception was fructose. The authors believe that they have demonstrated that high-resolution NIRS has the potential to identify heat-stable antinutritional (nonstarch polysaccharides and oligosaccharides) in soybeans and these methods can be used to improve the utilization of soybean meal in diets for some monogastic species.

Hollung, Kristin, and co-workers. 2005. Evaluation of nonstarch polysaccharides and oligosaccharides content of different soybean varieties (Glycine max) by near-infrared spectroscopy and proteomics. J. Agric. Food Chem. 53: (9112-9121.