A scanning electron microscopic examination of radiation-induced structural changes in potato tubers.

dc.contributor.author Mitchell, Villa en_US
dc.contributor.department Chemistry & Physics en_US
dc.date.accessioned 2014-06-20T16:29:49Z
dc.date.available 2014-06-20T16:29:49Z
dc.date.issued 1991 en_US
dc.description Major Professor: A. E. Woods. en_US
dc.description.abstract Both chemical and scanning electron microscopic (SEM) analyses were done on potato tubers ("Superior" variety) before and after a sprout inhibiting dose (10 Krad) of radiation. The chemical analyses were run to detect any changes in the reducing and nonreducing sugar content as well as any changes in the starch concentration. A colorimetric method using 3,5-dinitrosalicylic acid was chosen to estimate the change in sugar and starch content. The results obtained indicate that radiation caused an increase in the reducing and nonreducing sugar (sucrose) content and a decrease in the amount of starch. en_US
dc.description.abstract SEM analyses of the number and size of the starch granules within tuber cells showed that radiation caused a significant decrease in both values. There did not appear to be a significant difference in either value when comparing the samples 3 days and 1 week after irradiation. Observation of isolated starch granules from a blended tuber did not show any obvious change in granule surface or size. Irradiated sprout samples did not show a significant decrease in the number or size of the starch granules. en_US
dc.description.abstract Microscopic examination of the wound periderm did show a decrease in formed cells as a probable result of irradiation. The surface of the irradiated periderm appeared to be smooth and flattened compared to the unirradiated periderm. en_US
dc.description.abstract SEM analysis of the membrane surrounding the starch granules did not prove to be worthwhile. Transmitting electron microscopic examination of this fraction would be a more useful technique since it will show more detail about the internal structure. en_US
dc.description.degree D.A. en_US
dc.identifier.uri http://jewlscholar.mtsu.edu/handle/mtsu/4011
dc.publisher Middle Tennessee State University en_US
dc.subject.lcsh Potatoes Effect of radiation on en_US
dc.subject.lcsh Chemistry, Radiation en_US
dc.subject.lcsh Chemistry, Biochemistry en_US
dc.subject.lcsh Health Sciences, Radiology en_US
dc.thesis.degreegrantor Middle Tennessee State University en_US
dc.thesis.degreelevel Doctoral en_US
dc.title A scanning electron microscopic examination of radiation-induced structural changes in potato tubers. en_US
dc.type Dissertation en_US
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