The production of alpha-cyclodextrin by enzymatic degradation of starch.
Ann N Y Acad Sci
; 434: 70-7, 1984.
Article
in En
| MEDLINE
| ID: mdl-6240955
ABSTRACT
The maximum concentration of alpha-cyclodextrin for the enzymatic degradation of starch is limited to about 13.5 g X 1(-1). By addition of decanol, the equilibrium of the reaction system can be shifted towards an alpha-cyclodextrin yield of 50% even at high substrate concentrations. The main variables of the decanol process--pH, temperature, substrate quality, substrate, and enzyme concentration--have been studied. The cyclodextrin-glycosyltransferase from Klebsiella pneumoniae M5 al can preferentially be employed at pH 6 to 8, temperatures of 40 to 50 degrees C and a decanol concentration of 0.1 kg-1 starch. The dextrose equivalent of starch is important with respect to the maximum achievable starch concentration, but not with respect to the reaction. Under process conditions, the rate of alpha-cyclodextrin evolution is limited by the enzymatic reaction and not by mass transfer of decanol into the aqueous phase.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Starch
/
Cyclodextrins
/
Alpha-Cyclodextrins
/
Dextrins
/
Glucosyltransferases
/
Klebsiella pneumoniae
Language:
En
Journal:
Ann N Y Acad Sci
Year:
1984
Document type:
Article