Fig. 1 shows the percentage overall acceptability scores presented by the beer tasters. Statistical analysis of overall acceptability of the beers showed extremely significant differences (P=0.0005) between the beers. HG beers 2 and 3 had the highest score of 82% and
Bonferonni’s multiple comparisons test showed that there was no variation between the two brews (P 0.05). The beers were described as having excellent favour, good foam, no off flavour, although the panellists detected the slight sweet taste, which was due to the residual dissolved solids. Normal beer 1, which had the lowest overall acceptability score of 27%, was described as being unacceptable, having an off flavour. Normal beer 1, however, had lower levels of the organic acids than most of the HG beers suggesting that the sugar added to the HG beers may have masked the off flavours imparted by organic acids in the HG beers. Significant differences were recorded between overall acceptabilities of beers brewed using millet malt and
beers brewed using sorghum malt (P0.05). Differ-ences among the beers may have been due to the
varying levels of hydrolytic enzymes of the different cereal malts. Beers brewed using finger millet malt were generally more acceptable than the ones brewed using sorghum malt. It has been reported that glucanase develops more in millet malt than in sorghum malt [1]. The levels of tannins in the different cereals may also have affected the acceptability of the beers due to
astringency associated with high levels of tannins [3,5].
Fig. 1 shows the percentage overall acceptability scores presented by the beer tasters. Statistical analysis of overall acceptability of the beers showed extremely significant differences (P=0.0005) between the beers. HG beers 2 and 3 had the highest score of 82% andBonferonni’s multiple comparisons test showed that there was no variation between the two brews (P 0.05). The beers were described as having excellent favour, good foam, no off flavour, although the panellists detected the slight sweet taste, which was due to the residual dissolved solids. Normal beer 1, which had the lowest overall acceptability score of 27%, was described as being unacceptable, having an off flavour. Normal beer 1, however, had lower levels of the organic acids than most of the HG beers suggesting that the sugar added to the HG beers may have masked the off flavours imparted by organic acids in the HG beers. Significant differences were recorded between overall acceptabilities of beers brewed using millet malt andbeers brewed using sorghum malt (P0.05). Differ-ences among the beers may have been due to thevarying levels of hydrolytic enzymes of the different cereal malts. Beers brewed using finger millet malt were generally more acceptable than the ones brewed using sorghum malt. It has been reported that glucanase develops more in millet malt than in sorghum malt [1]. The levels of tannins in the different cereals may also have affected the acceptability of the beers due toastringency associated with high levels of tannins [3,5].
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