[en] To assess modifications induced in starch granules during high temperature drying of corn grain and their effect on the nutritive value of corn-starch, physicochemical and structural characteristics of starch granules from corn grains dried at different temperatures have been determined. Additionally, their in vitro digestibility and fermentation patterns were investigated, using a two steps in vitro model of the pig digestive tract. High drying temperatures induced a partial gelatinization of starch granules and produced a very favorable substrate for porcine pancreatic amylase and led to an altered physical structure which affected the rate and extent of starch granules digestion by gastric and pancreatic enzymes. Starch micrographs showed that granules extracted from corn dried at 130°C were less angular, bigger, and had smoother surface than granules extracted from corn dried at lower temperature. High-temperature drying increased the digestibility of wet-milled starch granules, while the residues of starch from corn dried at lower temperature produced higher volume of gas during their in vitro fermentation, despite their more pronounced crystalline characteristic. The residues from pepsin–pancreatic digestion of overall samples analyzed showed highly degraded and pitted granules or fragmented external shells, starch from corn dried at 130°C being the most degraded. Aforementioned changes of nutritional attributes of starch granules are discussed according to the restructuration occurring within both their amorphous and crystalline phase, as well as to the changes of the granules size and purity.
Disciplines :
Food science
Author, co-author :
Malumba Kamba, Paul ; Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Labo. d'Ingénierie des procédés agro-alim.
Eckoff, R.S., (2004) Encyclopedia of Grain Science, pp. 225-241. , Wrigley, C. Walker, C. E. (Eds.), Elsevier Ltd, Oxford, UK
Malumba, P., Janas, S., Masimango, T., Sindic, M., Influence of drying temperature on the wet-milling performance and the proteins solubility indexes of corn kernels (2009) J. Food Eng., 95, pp. 393-399
Malumba, P., Janas, S., Roiseux, O., Sinnaeve, G., Comparative study of the effect of drying temperatures and heat-moisture treatment on the physicochemical and functional properties of corn starch (2010) Carbohydr. Polym., 79, pp. 633-641
Mistry, A.H., Wu, X., Eckhoff, S.R., Litchfield, J.B., Wet-milling charactristics of high-temperature, high-humidity maize (1993) Cereal Chem., 70, pp. 360-361
Gehring, C.K., Bedford, M.R., Cowieson, A.J., Dozier, W.A., Effects of corn source on the relationship between in vitro assays and ileal nutrient digestibility (2012) Poult. Sci., 91, pp. 1908-1914
Gehring, C.K., Cowieson, A.J., Bedford, M.R., Dozier, W.A., Identifying variation in the nutritional value of corn based on chemical kernel characteristics (2013) World's Poult. Sci. J., 69, pp. 299-312
Cowieson, A.J., Factors that affect the nutritional value of maize for broilers (2005) Anim. Feed Sci. Technol., 119, pp. 293-305
Malumba, P., Vanderghem, C., Deroanne, C., Béra, F., Influence of drying temperature on the solubility, the purity of isolates and the electrophoretic patterns of corn proteins (2008) Food Chem., 111, pp. 564-572
Malumba, P., Janas, S., Deroanne, C., Masimango, T., Béra, F., Structure de l'amidon de maïs et principaux phénomènes impliqués dans sa modification thermique (2011) Biotechnol. Agron. Soc. Environ., 15, pp. 315-326
Janas, S., Boutry, S., Malumba, P., Vander Elst, L., Béra, F., Modelling dehydration and quality degradation of maize during fluidized-bed drying (2010) J. Food Eng., 100, pp. 527-534
Malumba, P., Massaux, C., Deroanne, C., Masimango, N., Bera, F., Influence of drying temperature on functional properties of corn starch (2009) Carbohydr. Polym., 75, pp. 299-306
Massaux, C., Sindic, M., Lenartz, J., Sinnaeve, G., Variations in physicochemical and functional properties of starches extracted from European soft wheat (Triticum aestivum L.): The importance to preserve the varietal identity (2008) Carbohydr. Polym., 71, pp. 32-41
Boisen, S., Fernáandez, J.A., Prediction of the total tract digestibility of energy in feedstuffs and pig diets by in vitro analyses (1997) Anim. Feed Sci. Technol., 68, pp. 277-286
Bindelle, J., Buldgen, A., Lambotte, D., Wavreille, J., Leterme, P., Effect of pig faecal donor and of pig diet composition on in vitro fermentation of sugar beet pulp (2007) Anim. Feed Sci. Technol., 132, pp. 212-226
Menke, K.H., Steingass, H., Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid (1988) Anim. Res. Dev., 28, pp. 7-55
Groot, J.C.J., Cone, J.W., Williams, B.A., Debersaques, F.M.A., Lantinga, E.A., Multiphasic analysis of gas production kinetics for in vitro fermentation of ruminant feeds (1996) Anim. Feed Sci. Technol., 64, pp. 77-89
Bauer, E., Williams, B.A., Voigt, C., Mosenthin, R., Verstegen, M.W.A., Microbial activities of faeces from unweaned and adult pigs, in relation to selected fermentable carbohydrates (2001) Anim. Sci., 73, pp. 313-322
Joupilla, K., Roos, Y.H., The physical state of amorphous corn starch and its impact on crystallization (1997) Carbohydr. Polym., 32, pp. 95-104
Buléon, A., Colonna, P., Leloup, V., Les amidons et leurs dérivés dans les industries des céréales (1990) Industries Alimentaires et Agro-industrielles, 6, pp. 515-531
Altay, F., Gunasekaran, S., Influence of drying temperature, water content, and heating rate on gelatinization of corn starches (2006) J. Agric. Food Chem., 54, pp. 4235-4245
Haros, M., Tolaba, M.P., Suárez, C., Influence of drying on its quality for the wet-milling process (2003) J. Food Eng., 60, pp. 177-184
Tahir, R., Ellis, P.R., Butterworth, P.J., The relation of physical properties of native starch granules to the kinetics of amylolysis catalysed by porcine pancreatic-amylase (2010) Carbohydr. Polym., 81, pp. 57-62
Colonna, P., Leloup, V., Buleon, A., Limiting factors of starch hydrolysis (1992) Eur. J. Clin. Nutr., 46, pp. S17-S32
Holm, J., Hagander, B., Bjorck, I., Eliasson, A.-C., Lundquist, A., The effect of various thermal processes on the lycemic response to whole grain wheat products in humans and rats (1989) J. Nutr., 119, pp. 1631-1638
Slaughter, S.L., Ellis, P.R., Butterworth, P.J., An investigation of the action of porcine pancreatic α-amylase on native and gelatinised starches (2001) Biochim. Biophys. Acta, 1525, pp. 29-36
Jacquet, N., Vanderghem, C., Danthine, S., Quiévy, N., Influence of steam explosion on physicochemical properties and hydrolysis rate of pure cellulose fibers (2012) Biores. Technol., 121, pp. 221-227
Tahir, R., Ellis, P.R., Bogracheva, T.Y., Meares-Taylor, C., Butterworth, P.J., Study of the structure and properties of native and hydrothermally processed wild-type, lam and r variant pea starches that affect amylolysis of these starches (2011) Biomacromolecules, 12, pp. 123-133
Buléon, A., Colonna, P., Planchot, V., Ball, S., Starch granules: Structure and biosynthesis Mini review (1998) Int. J. Biol. Macromol., 23, pp. 85-112
Gallant, D.J., Bouchet, B., Baldwin, P.M., Microscopy of starch: Evidence of a new level of granule organization (1997) Carbohydr. Polym., 32, pp. 177-191
Planchot, V., Colonna, P., Gallant, D.J., Bouchet, B.J., Extensive degradation of native starch granules by alpha-amylase from Aspergillus fumigatus (1995) J. Cereal Sci., 21, pp. 163-171
Yamaguchi, M., Kainuma, K., French, D., Electron microscopic observations of waxy maize starch (1979) J. Ultrastruct. Res., 69, pp. 249-261
Jenkins, P.J., Donald, M., Application of small-angle neutron scattering to study of structure of starch granules (1996) Polymer, 25, pp. 5559-5568
Bindelle, J., Buldgen, A., Wavreille, J., Agneessens, R., The source of fermentable carbohydrates influences the in vitro protein synthesis by colonic bacteria isolated from pigs (2007) Animal, 1, pp. 1126-1133