Starch Characteristics and Their Influences on In Vitro and Pig Prececal Starch Digestion.
Summary of "Starch Characteristics and Their Influences on In Vitro and Pig Prececal Starch Digestion."
The main objective of this research was to study the starch granules characteristics and their influences on in vitro and pig prececal starch digestion of corn, dehulled barley, wheat and potato. Scanning electron microscopy was used to study starch endosperm structure in the parent material as well as in in vitro starch digestion. The results showed corn starch granules were polyhedral with a diameter ranging from 2 to 10 μm, whereas those of dehulled barley and wheat were spherical with a diameter ranging from 5 to 20 μm. Potato had the largest starch granules among starch sources reported herein with oval sphere of 10 to 50 μm in diameter. In vitro starch hydrolysis showed that starch granules of corn degraded faster than the starch of dehulled barley and wheat, with the potato starch being degraded the slowest. In vivo digestibility trial using ileal-cannulated pigs confirmed the starch degradation of grains. The in vitro (X, %) and in vivo (Y, %) digestibility were highly correlated [Y= 6.5304X-538.48 (R2=0.9924)]. Based on the results, in vitro starch hydrolysis might be useful in predicting in vivo prececal starch digestibility. The digestion kinetic characteristics of different starch sources might be employed to evaluate the starch digestive rate at the pig ileum.
Affiliation
Journal Details
This article was published in the following journal.
Name: Journal of agricultural and food chemistry
ISSN: 1520-5118
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/21609031
- DOI: http://dx.doi.org/10.1021/jf200402u
Medical and Biotech [MESH] Definitions
Electrophoresis, Starch Gel
Electrophoresis in which a starch gel (a mixture of amylose and amylopectin) is used as the diffusion medium.
Starch Phosphorylase
An enzyme of the PHOSPHORYLASES family that catalyzes the degradation of starch, a mixture of unbranched AMYLOSE and branched AMYLOPECTIN compounds. This phosphorylase from plants is the counterpart of GLYCOGEN PHOSPHORYLASE in animals that catalyzes the reaction of inorganic phosphate on the terminal alpha-1,4-glycosidic bond at the non-reducing end of glucans resulting in the release of glucose-1-phosphate.
Amylose
An unbranched glucan in starch.
Amylopectin
A highly branched glucan in starch.
Hetastarch
A derivative of STARCH used as a plasma substitute in the treatment of hemorrhage.
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