Microbiological,rheological and aromaticcharacteristics of fermented Uji (an East African Sour Porridge) |
| |
Authors: | Masha GGK Ipsen R Petersen MA Jakobsen M |
| |
Institution: | (1) Kenya Industrial Research and Development Institute, PO Box 30650, Nairobi, Kenya;(2) Department of Dairy and Food Science, The Royal Veterinary and Agricultural University, Rolighedsvej 30, DK-1958 Frederiksberg, Denmark; fax: (+ |
| |
Abstract: | Three methods for fermentation of uji were compared in laboratory trials: spontaneous, backslopping (using an inoculum from a previous fermentation) and use of a starter culture of lactic acid bacteria. Spontaneous fermentation resulted in the slowest decrease in pH, while the use of starter culture led to the lowest final pH (3.5). Coliforms were eliminated in less than 8 h using backslopping or starter culture, but increased in numbers during spontaneous fermentation. The viscosity of uji was only marginally affected by the method of fermentation. The aroma profile following spontaneous fermentation contained esters with fruity notes and ethanol and higher alcohols, while mainly organic acids was produced by fermentation with the starter culture. Backslopping led to the lowest production of almost all volatiles identified. |
| |
Keywords: | Aroma fermentation starter cultures uji viscosity |
本文献已被 SpringerLink 等数据库收录! |
|