Effects of gamma-irradiation on the biochemical constituents and shelf-life of chico (Achras zapota L.)

Date of Publication

1986

Document Type

Master's Thesis

Degree Name

Master of Science in Biology

Subject Categories

Biology

College

College of Science

Department/Unit

Biology

Thesis Adviser

George Pahl FSC

Defense Panel Chair

Esperanza Cabrera

Defense Panel Member

Corazon Sinha
Milagros Relon

Abstract/Summary

Half-ripe chicos of approximately equal weights were irradiated with 50, 150 and 300 krad. With the unirradiated group serving as the control, the effects of the different doses on protein, ash, vitamin C and B-carotene contents of the fruits were investigated. Protein and ash contents were found to be unaffected (p. .01) by irradiation even at higher doses. Vitamin C and B-carotene however, were found to decrease significantly (p .01) especially when the higher doses were applied. Vitamin C was found to decrease by 31 percent, 64 percent and 80 percent when fruits were irradiated with 50, 150 and 300 krad, respectively. B-carotene on the other hand, was found to decrease by 6 percent, 40 percent and 55 percent at doses 50, 150 and 300 krad, respectively. Multiple range test - SNK proved that for both Vitamin C and B-carotene, the means observed for the different doses were significantly different (p 0.01) from each other. The irradiated fruits were also found to have longer shelf-life than the unirradiated group. Species of fungi isolated from the decaying chicos were predominantly Rhizopus sp. and Aspergillus sp.

Abstract Format

html

Language

English

Format

Print

Accession Number

TG01477

Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

33 leaves; 28 cm.

Keywords

Sapodilla -- Effect of gamma rays on

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