Dublin Core
Title
Response Surface Methodology for Studying Effects of Pre-Processing Treatments and Processing Time on the Microbial and Sensory Qualities of Cocoyam (Xanthosoma sagittifolium …
Creator
EO Afoakwa, PG Boakye, H Mensah-Brown, L Chiwona-Karltun
Description
Response surface methodology and central composite rotatable design for K= 3 was used to study the combined effects of blanching time, sodium metabisulphite (Na2S2O5) concentration and processing (retorting) time on the total microbial load, and sensory qualities (colour, aroma, texture, overall acceptability) of cocoyam leaves during canning. Regression models and response surface plots were developed from regression analysis to predict the effects of the variables on the studied indices. Significant (P< 0.05) interactions were noted between all the factors with high regression coefficients (61.7%-94.7%). Increasing processing times led to decreases in microbial load and degree of liking for colour of the canned cocoyam leaves. Blanching was effective in reducing browning and increasing the degree of liking for colour of the canned leaves. Treatment of the leaves with sodium metabisulphite solution significantly reduced the microbial load and the degree of likeness of the different sensory attributes of the canned product. The combined action of sodium metabisulphite concentration, blanching time and processing time were effective in reducing the total microbial load as well as the degree of liking for colour of cocoyam leaves during canning of the canned product. These could serve as a means of enhancing the shelf stability as well as the overall acceptability of the product. The most acceptable product was the one blanched for 1 minute, with 0.5% anti-browning agent concentration, and retorted for 20 minutes.
Publisher
Copyright
Date
2014
Source
https://scholar.google.com/citations?view_op=view_citation&hl=en&user=EZuX1N8AAAAJ&cstart=100&pagesize=100&citation_for_view=EZuX1N8AAAAJ:Lpa4s8qvUTIC
Language
English