Difference between revisions of "Rice starch"
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| − | [[File:5_Rice_starch_200XS.jpg|thumb|Rice starch]] | + | [[File:5_Rice_starch_200XS.jpg|thumb|Rice starch at 200x transmitted light]] |
== Description == | == Description == | ||
| − | + | [[File:5_Rice_starch_200XS_pol.jpg|thumb|Rice starch at 200x polarized light]] | |
[[Polysaccharide]] granules that compose about 70% of the rice kernel. Rice starch is separated from the gluten and fibrous particles by sieving then wash flotation. Rice starch is composed of 17% [[amylose]]. Rice starch paste forms a weaker, but more stable, film than [[wheat starch|wheat starch paste]]. | [[Polysaccharide]] granules that compose about 70% of the rice kernel. Rice starch is separated from the gluten and fibrous particles by sieving then wash flotation. Rice starch is composed of 17% [[amylose]]. Rice starch paste forms a weaker, but more stable, film than [[wheat starch|wheat starch paste]]. | ||
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rice glue; rice gum; rice powder | rice glue; rice gum; rice powder | ||
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== Risks == | == Risks == | ||
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== Physical and Chemical Properties == | == Physical and Chemical Properties == | ||
| − | Fine, angular granules. Granule size = 3 - 8 micrometers. | + | * Fine, angular granules. |
| − | + | * Granule size = 3 - 8 micrometers. | |
| − | Gelatinization temperature = 68 - 78 C | + | * Gelatinization temperature = 68 - 78 C |
| − | + | * Reacts with a iodine/potassium iodide solution to give a positive purple color | |
| − | Reacts with a iodine/potassium iodide solution to give a positive purple color | ||
== Resources and Citations == | == Resources and Citations == | ||
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* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "cereal processing" [Accessed April 8, 2002]. | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "cereal processing" [Accessed April 8, 2002]. | ||
| − | * Art and Architecture Thesaurus Online, | + | * Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000 |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 15:14, 25 August 2022
Description
Polysaccharide granules that compose about 70% of the rice kernel. Rice starch is separated from the gluten and fibrous particles by sieving then wash flotation. Rice starch is composed of 17% Amylose. Rice starch paste forms a weaker, but more stable, film than wheat starch paste.
Synonyms and Related Terms
rice glue; rice gum; rice powder
Risks
Susceptible to biodeterioration. Dried films become brittle with age.
Physical and Chemical Properties
- Fine, angular granules.
- Granule size = 3 - 8 micrometers.
- Gelatinization temperature = 68 - 78 C
- Reacts with a iodine/potassium iodide solution to give a positive purple color
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 766
- Rosalie Rosso King, Textile Identification, Conservation, and Preservation, Noyes Publications, Park Ridge, NJ, 1985
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
- Encyclopedia Britannica, http://www.britannica.com Comment: "cereal processing" [Accessed April 8, 2002].
- Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000