AN INVESTIGATION OF THE DESTRUCTION OF STARCH AS A FUNCTION OF THE DOSE OF IONIZING GAMMA RADIATION

Journal Article · Thu Aug 11 04:00:00 EDT 1960 · Doklady Akad. Nauk S.S.S.R.

OSTI ID:4103806

Oreshko, V F; Korotchenko, K A

Potato starch with an initial moisture content of 16.6% was subjected to integral gamma doses varying from 10/sup 6/ to 18.2 x 10/sup 6/ r. The pH of an aqueous extract after radiation decreased from 6.65 to 5.80. The content of reducing agents expressed as milligram of glucose per gram of starch increased with increasing dose from 0.35 to 9.85. The average molecular weight of the starch decreased with increasing dose from 462,000 to 16,500. Linear plots of 1/ M (M = average molecular weight of the starch), content of reducing agent (milligram of glucose per gram of starch), and G/D (G, milligram of gaseous products per gram of starch, D, dose) vs. D (dose in roentgens) are presented, and equations are derived that describe the rate of the process of destruction. The average energy required to break a single bond was found to be 28.0 ev. Spectrophotometric curves show an increase in absorption at 220-240 m mu (similar to the formation of an anhydride from a monosaccharide), and a maximum at 260-265 m mu (due to the formation of formaldehyde or dioxyacetone). (TTT)

• Research Organization: Moscow Technological Inst.
• NSA Number: NSA-15-007365
• OSTI ID: 4103806
• Journal Information: Doklady Akad. Nauk S.S.S.R., Journal Name: Doklady Akad. Nauk S.S.S.R. Vol. Vol: 133
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
ACETONE
ALDEHYDES
CARBOHYDRATES
CHEMISTRY
DECOMPOSITION
ENERGY
FORMALDEHYDE
FORMIC ACID
GAMMA RADIATION
GLUCOSE
MOLECULES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOMETRY
POTATOES
RADIATIONS
REDUCTION
SACCHARIDES
SOLUTIONS
SPECTRA
STARCH
SUGARS
WATER
WEIGHT