Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Title Preservation of Tshidzimba, a cereal-legume composite porridge, through fermentation, canning and drying
Dissertation (M Inst Agrar ( Food Processing))--University of Pretoria, 2006.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Published: |
University of Pretoria
2013
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613458924568576 |
|---|---|
| access_status_str | Open Access |
| author2 | Taylor, J.R.N. (John Reginald Nuttall) |
| author_browse | Taylor, J.R.N. (John Reginald Nuttall) |
| author_facet | Taylor, J.R.N. (John Reginald Nuttall) |
| collection | Thesis |
| dc_rights_str_mv | © 2001 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (M Inst Agrar ( Food Processing))--University of Pretoria, 2006. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/26225 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:36:28.597Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/26225 Title Preservation of Tshidzimba, a cereal-legume composite porridge, through fermentation, canning and drying Taylor, J.R.N. (John Reginald Nuttall) upetd@up.ac.za Minnaar, Amanda Takalani, Thakani Kennedy Food preservation drying Food preservation fermentation Food preservation canning UCTD Dissertation (M Inst Agrar ( Food Processing))--University of Pretoria, 2006. Traditional African foods are often rich in nutrients and play an important role in increasing variety in diets of people in rural areas. Tshidzimba is popular amongst the Vhavenda of South Africa. It is made from maize samp, milled peanuts and salt. However, it has a very short shelf life when stored at ambient temperature. Canning, drying and fermentation of Tshidzimba were investigated to increase shelf-life. Factors investigated were microbiological quality, nutrient content (in terms of fat and protein content), levels of essential amino acids, water activity and sensory acceptability. Unpreserved Tshidzimba had very high total plate counts, yeasts and moulds after 3 days of storage at 25°C. Fermentation reduced the yeasts and moulds by 102 and total plate counts by 103 after 21 days of storage at 25°C from those of unpreserved Tshidzimba. Drying reduced the yeasts and moulds by 104 and total plate counts by 105 after 21 days of storage at 25°C. Anaerobic spore formers were not detected in canned Tshidzimba after 21 days of storage at 25°C. Drying reduced the fat content probably due to fat oxidation at the elevated drying temperature (50°C). However, in general the preservation methods had little effect on the general nutrient content of Tshidzimba. Tshidzimba protein showed low lysine value compared to the estimates of amino acid requirements for infants. For Tshidzimba to be a good source of nutrients for infants, fortification with a higher proportion of legume grains is recommended. Drying seemed to increase lysine (2.61 g/100 g protein) compared to that of unpreserved Tshidzimba (2.28 g/100 g protein), while canning reduced lysine (1.97 g/l00 g protein), probably due to its participation in Maillard reaction at the high canning temperature (116°C/70 min). Fermentation increased methionine content probably due to fermentative microorganisms, which are known to produce some amino acids while fermenting food products. Canning seemed to have reduced the methionine content possibly due to Maillard reaction. Consumer panellists indicated that of the preserved Tshidzimba, dried Tshidzimba had high acceptance compared to canned and fermented Tshidzimba. Some panellists disliked the sour taste of fermented Tshidzimba. Dried Tshidzimba was perceived to have a firmer texture compared to unpreserved Tshidzimba. Further research could help to determine the appropriate temperature/time combination that can least affect the texture of dried Tshidzimba. Food Science unrestricted 2013-09-07T03:58:22Z 2006-07-12 2013-09-07T03:58:22Z 2001-09-01 2006-07-12 2006-07-12 Dissertation Takalani, TK 2001, Preservation of Tshidzimba, a cereal-legume composite porridge, through fermentation, canning and drying, MInstAgrar dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/26225 > H1119/ag http://hdl.handle.net/2263/26225 http://upetd.up.ac.za/thesis/available/etd-07122006-101526/ © 2001 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Food preservation drying Food preservation fermentation Food preservation canning UCTD Title Preservation of Tshidzimba, a cereal-legume composite porridge, through fermentation, canning and drying |
| title | Title Preservation of Tshidzimba, a cereal-legume composite porridge, through fermentation, canning and drying |
| title_full | Title Preservation of Tshidzimba, a cereal-legume composite porridge, through fermentation, canning and drying |
| title_fullStr | Title Preservation of Tshidzimba, a cereal-legume composite porridge, through fermentation, canning and drying |
| title_full_unstemmed | Title Preservation of Tshidzimba, a cereal-legume composite porridge, through fermentation, canning and drying |
| title_short | Title Preservation of Tshidzimba, a cereal-legume composite porridge, through fermentation, canning and drying |
| title_sort | title preservation of tshidzimba a cereal legume composite porridge through fermentation canning and drying |
| topic | Food preservation drying Food preservation fermentation Food preservation canning UCTD |
| url | http://hdl.handle.net/2263/26225 http://upetd.up.ac.za/thesis/available/etd-07122006-101526/ |