Abstract
Starches extracted from root mashes of the Nkabom, Esam Bankye, Bankyehemaa, Doku Duade and Afisiafi cassava varieties, with the aid of (crude) pectolytic enzymes from Saccharomyces cerevisiae pectolytic were analysed to compare effects of (pectolytic) enzyme technology on the physicochemical properties of the extracted starches. This was to help establish the extent to which varietal differences affect application of the technology and to inform the possible domestic or industrial application of the ensuing starches. Enzyme treatment generally did not affect the protein, fiber and ash content of the starches. However, it significantly increased moisture content, starch granule sizes, water binding capacity and swelling power of the starches in most the varieties; pH of the extruded starches were also significantly decreased and the starches’ colour was also significantly made lighter by the technology. Despite the general trends observed, the technology was found to impact physicochemical properties of some varieties more than others. The work therefore showed that the technology is variety-sensitive and could influence starch utility. Key words: Amylolysis, cassava varieties, crude pectolytic enzymes, endogenous amylase, starch physicochemical properties.
Highlights
In many parts of the world, enzyme application in industry has become common
Photomicrographs of starch granules from root mashes of untreated and treated cassava varieties are presented in Plates 1 to 5
Starch granule sizes obtained ranged from 5.33 - 23.34 μm (Table 1)
Summary
In many parts of the world, enzyme application in industry has become common. The food, pharmaceutical, neutraceutical and medical sectors are all profoundly impacted by enzyme use. As of 2013, global market for enzymes was estimated at 4.8 billion dollars and demand is expected to rise to about 7.1 billion dollars in the year 2018; this comes to a compound annual growth of about between the said periods (https://www.bccresearch.com/marketresearch/biotechnol ogy/enzymes-industrial-applications-bio030h.html). In many parts of Africa, enzyme technology is a rather nascent novelty; it is applied, in some cases, in total oblivion in traditional food processing
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