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Anusorn Cherdthong, PhD 137748 Applied Biochemistry in Nutritional Science Email: anusornc@kku.ac.th E-learning: http://ags.kku.ac.th/eLearning/137748 Metabolism of Nutrients in Stomach and Intestine
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Introduction Metabolism: Catabolism: large small molecule and receiving ATP Anabolism: small large molecule and spend ATP, NADPH
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Metabolism in stomach Carbohydrate: overview Mouth: -amylase Teeth Esophagus Stomach: no amylase Small/large intestine: enzymes Rectal: excretion
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Metabolism in stomach Wanapat et al. (2013)
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Metabolism in stomach Carbohydrate: Rumen metabolism poly mono saccharide: extracellular microbial enzyme: Cellulose—cellobiose Hemicellulose—cellobiose Pectin—methanol and pectic acid Mono saccharide pyruvate Pyruvate---VFA, CH4 C2, C3 and C4
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Metabolism in stomach McDonald et al. (2011) Carbohydrate: Rumen metabolism
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Metabolism in stomach McDonald et al. (2011) VFV synthesis in rumen
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Metabolism in stomach Protein: overview in stomach Gastrin hormone HCl excretion: low pH (2.0) Pepsinogen excretion: proenzyme for peptide degrade
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Metabolism in stomach Protein: Rumen Proteiolytic microorganism Bacteria Protozoa Fungi McDonald et al. (2011)
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Metabolism in stomach Lipid: overview in stomach No digest in non ruminant stomach Ruminant act by rumen microbes by: Hydrolysis Hydrogenation Isomerization
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Metabolism in intestine Carbohydrate: Require enzyme for pancreases: -amylase -glucosidase Maltase -dextrinase
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Metabolism in intestine Protein metabolism in small intestine: Modified from Cunningham (1992)
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Metabolism in intestine Protein metabolism in small intestine: Modified from Cunningham (1992)
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Metabolism in intestine Lipid metabolism in small intestine: Triacyl glycerol Required bile salt as emulsifier Excreate cholecystokinin and secretin Formulation of mixed micelle for transfer and absorption Bile recycle when reaction finished Required pancreatic lipase
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Metabolism in intestine Lipid: Absorption Chylomicron: lipoprotein Via lymph system--- blood---tissue Metabolism in liver, storage Nelson and Cox (2000)
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Metabolism in large intestine: A few metabolism in this part Digest some cellulose by-pass Work by bacteria Re-absorption of nutrients Essential for equine: fiber digestion
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Conclusion 1 2 3 Metabolism of nutrient in stomach Utilization of nutrient in different animal al species Metabolism of nutrient in intestine
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Thank you!
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