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Effect of Processing on Nutritional, Microbiological and Sensory Properties of Kunun-Zaki (A Sorghum Based Non-Alcoholic Beverage) Widely Consumed in Nigeria
N.A. Amusa,O.A. Ashaye
Pakistan Journal of Nutrition , 2009,
Abstract: The effect of processing on Nutritional, Microbiological and Sensory Properties of Kunun-Zaki widely consumed was investigated at Ibadan Nigeria. The result of the analysis indicated that the highest % crude protein was found in the Kunun zaki samples from the Unseieved kunun flour followed by kunun samples from sieve kunun flour, while the least % crude protein was found in Traditionally processed kunun samples. There were no significant differences between the carbohydrates content of the traditionally processed kunun zaki and that processed using kunun flour. The PH of the traditionally processed Kunun zaki drinks were highest followed by kunun drinks processed from sieved kunun flour, while the least was found in kunun drinks processed from sieved kunun flour. The yeast and lactic acid bacterial count were highest in the traditionally processed kunun drink samples followed by kunun drinks processed from sieved kunun flour, while they were absent in kunun drinks processed from unseieved kunun flour. Coliform counts were found to be highest in the traditional processed kunun drinks, while the least count were obtained in kunun drinks from unseieved kunun flour. The traditionally processed kunun drinks was most preferred in terms of color, followed by kunun drinks from the sieved kunun flour while the least was found with kunun drinks from unseieved kunun flour. With regards to taste and texture, there was no significant difference between the kunun drinks traditionally processed and that from the sieved kunun flour, however, these were significantly different from the kunun drinks from the unseieved kunun flour.
Influence of malting on the nutritional characteristics of kunun-zaki
O Akoma, EA Jiya, DD Akumka, E Mshelia
African Journal of Biotechnology , 2006,
Abstract: Kunun-zaki, a traditional fermented cereal beverage was produced in this study using various combinations of malted cereals (millet, sorghum singularly or in combination with rice) and, were evaluated for its nutritional composition using chemical, organoleptic and growth studies and as well as the analysis of blood samples of the sacrificed animals. The results obtained show that the weaning albino rats fed with laboratory diet and kunun-zaki produced by the addition of ground malted rice to millet for 14 days gained more weight (27.7 g) and was significantly different (p< 0.05) from the other products. A similar trend was observed in the lymphocyte count. The crude protein, crude fat and calcium contents of kunun-zaki produced with the addition of malted rice to millet were higher (0.74%,0.53% and 88 ppm) than the other products. A similar trend was observed in the titratable acidity and pH(0.76% lactic acid, 4.78), respectively, at the end of fermentation period. Furthermore, kunun-zaki produced by the addition of ground-malted rice to millet was generally preferred organoleptically (aroma and taste) and was significantly different (p< 0.05) from the other products. This study has shown that use of malted cereals improved the nutritional quality of the kunun-zaki. Also, the elevated lymphocyte counts obtained in the blood samples of animals fed with kunun-zaki produced using combinations of malted cereals is indicative of its medicinal attributes, a concept widely believed by its numerous consumers
Innovations in the Traditional Kunun Zaki Production Process  [PDF]
Gaffa Terna,J.A. Ayo
Pakistan Journal of Nutrition , 2002,
Abstract: The traditional kunun zaki production process has been improved upon. The usual 24 hours process has been shortened to a maximum of 12 hours. Steeping of the grains in warm water with 5% sodium metabisulphite help in softening them. Liquefaction and saccharification of gelatinized sorghum starch with sweet potato and Cadaba farinosa crude extracts did not increase the amount of reducing sugar after 6 hours of incubation. Similarly, the specific density of the slurry remained the same after 6 hours of incubation with the crude enzyme extracts. Due to shortened saccharification process, the nutrient content of kunun zaki from improved process was a bit higher. The protein content was 5.4 and 4.1% for the improved and traditional processes respectively. The product from improved process was preferred to that in the traditional process.
Effects of pasteurisation on survival patterns of microorganisms and vitamin C retention in kunun-zaki
OJ Egbere, KV Pam, KD Adesheyan, T A'Kadir, SK Oyero
African Journal of Biotechnology , 2009,
Abstract: The effects of pasteurisation on the survival patterns of the microflora as well as vitamin C retention in kunun-zaki fortified with vitamin C was syudied. A laboratory sorghum based kunun–zaki was fortified with 90 mg/l of vitamin C. The content was subjected to pasteurisation at 70oC for different time intervals ranging from 0 - 30 min. Samples of the beverage were then taken at 5 min intervals during pasteurisation and were analysed for microbial load and residual vitamin C content by 2,6-dichloroindophenol titration method. The results showed that there was a gradual decline in vitamin C retention and steep decline in the microbial load reduction during pasteurisation. The result also showed that at the 20th min of pasteurisation, 80% of microbial isolates had been eliminated leaving only Bacillus Subtilis and Saccharomyces cerevisiae as the surviving organisms. The D70 -value of the most heat resistant organism B. subtilis was found to be 6.5 min.
The Nutritional and Sensory Quality Characteristics of Kunun-zaki Produced with the Addition of Hydrolytic Enzymes from Malted Rice (Oryza sativa)
O Akoma, S.A. Onuoha, M.O. Ajiboye, A.O. Akoma, A.M. Alawoki
Journal of Food Technology in Africa , 2002,
Abstract: Kunun-zaki was produced from millet (Pennisetum typhodeum), sorghum (Sorghum bicolor) or maize (Zea mays) with or without the addition of hydrolytic enzymes obtained from ground-malted rice (Oryza sativa FARO 37) and analyzed for its chemical and organoleptic quality attributes. The results obtained show that there were 33, 44, 66% increases in crude protein 52, 117 and 91% increases in sucrose contents in those products (i.e. kunun-zaki produced from millet, sorghum and maize respectively) in which the extracts from ground-malted rice were incorporated. A similar increase was observed in acidity, iron, calcium and phosphorus contents. Furthermore, the sensory attributes of kunun-zaki produced using extracts from ground-malted rice did not differ (p>0.05) from the other products in appearance, taste, texture and sensory overall acceptability but differed (p<0.05) in aroma, which could be attributed to the production of more organic acids in these products by the fermenting microorganisms. The result obtained in this study therefore suggests that it could be economical and nutritious to use malted cereal grains in the production of kunun-zaki. The Journal of Food Technology in Africa Volume 7 No.1, 2002, pp. 24-26
Nutritional Evaluation of Millet-beniseed Composite Based Kunun-zaki  [PDF]
J.A. Ayo,O.G. Onuoha,D.S. Ikuomola,Y.O. Esan
Pakistan Journal of Nutrition , 2010,
Abstract: Kunun-zaki was prepared using millet as the base and supplemented with beniseed at varied level (0-50%). The effect of added beniseed on the physio-chemical (moisture, ash, protein, fat and carbohydrate), sensory (colour, taste, odour/aroma, mouth feel and general acceptability) and microbial qualities were evaluated. The added beniseed decreased the moisture, ash and carbohydrate composition from 86.23-85.03, 0.33-0.22 and 10.21-7.23%, respectively with increasing concentration (0-50%), while fat and protein increased from 1.03-2.03% and 2.21-5.44% respectively with increasing concentration (0-50%). The added beniseed paste had a high positive correlation coefficient (r = 0.75-0.95) with the increase in the protein, fat and energy content. There were significant differences in the assessed sensory qualities (colour, odour, taste, texture) at 20% and above added beniseed paste which corresponds with 3.32%, 1.26% and 64.06 kcal of protein, fats and energy content respectively. At this acceptable level the protein content of the products has been improved by 50% if digested and absorbed.
Microbiological and Nutritional Quality of Hawked Kunun (A Sorghum Based Non-Alcoholic Beverage) Widely Consumed in Nigeria  [PDF]
N.A. Amusa,O.A. Odunbaku
Pakistan Journal of Nutrition , 2009,
Abstract: The microbiological and nutritional quality of freshly processed and hawked kunun drinks in South Western Nigeria was investigated at Ibadan, Nigeria. The microbes found associated with both the hawked and the laboratory prepared kunun samples are Lactobacillus plantarum, Bacillus sutilis, B. cereus, Streptococus feaceaum, S. lactis, Staphylococcus aureus, Micrococcus acidiophilis, Escherishai coli, Pseudomonas aureginosa, Saccharomysces cerevisiae, Candida mycoderma, Aspergillus niger, Penicillium oxalicum and Fusarium oxysporum. However, the freshly processed kunun drinks harbored no coliform bacteria. The crude protein content of the hawked kunun drinks was found higher than that of the laboratory processed kunun samples, while the PH of the Kunun zaki drinks were highest in the laboratory processed samples. However, there were no significant differences between the carbohydrates contents of the laboratory processed kunun drinks sample and that of the hawked kunun drinks.
Physicochemical and Sensory Effects of Cadaba Farinosa Crude Extract on Cereal Starches During Kunun Zaki Production  [PDF]
Gaffa T.,J. A. Ayo
Pakistan Journal of Nutrition , 2003,
Abstract: Physicochemical and sensory effects of Cadaba farinosa crude extract on cereal starches during kunun zaki production were studied. The crude extract was able to hydrolyze gelatinized starch leading to its liquefaction. Generally, gelatinized starch produced more reducing sugars with the crude extract (0.023mg/ml) than native starch (0.008mg/ml) for millet. The same trend was observed in other crude extracts (malted rice, sweet potato and malted sorghum) and starches too. The crude extract of C. farinosa with increasing concentration decreased viscosity of kunun zaki and imparted varying effects on sensory qualities. Increasing concentration of the extract had more effect on flavour and above 0.25% (w/v) the acceptability decreased. Specific density of kunun zaki decreased (1.198-1.095) with increased concentration of Cadaba farinosa. Temperatures above 70 oC affected the hydrolyzing ability of the crude extract. Isolation and purification of the extract`s components is desirable.
Effect of Aframomum danelli and Black Pepper Crude Extracts on Physico-Chemical and Sensory Properties of Kunun-Zaki During Storage
I.I. Adedokun,S.U. Okorie,B.C. Nwokeke,E.N. Onyeneke
Journal of Food Technology , 2013, DOI: 10.3923/jftech.2012.97.102
Abstract: Kunun-zaki spiced with crude extracts from Aframomum danelli and black pepper spices was produced from three cereal grains, respectively and subjected to ambient, refrigeration and freezing conditions for 4 weeks. The samples of Kunun-zaki generally showed a significant variation (p<0.05) in proximate composition during storage the protein content under ambient declined from 1.81% control sample to 0.28% at 2nd week, similarly, fat 0.82- 0.28%, carbohydrate 11.38-5.53% and ash content varied from 1.38-0.82% while the variation was less pronounced in samples under refrigeration and freezing conditions. The pH content declined during storage period and was found significant at p<0.05, under ambient condition the pH decreases steadily from 4.92 at 1st day of storage (control) to 2.01 at 2nd week of storage while under refrigeration and freezing conditions the pH declined from 4.92 control to 3.96 (at 4th week). Similar trend was observed on percentage Total Titrable Acidity (TTA%), there was a steady increase in TTA% of samples from 0.46% (control) to 6.14% sample under ambient condition at 4th week of storage while 0.46-1.03% was found in samples kept under refrigeration and freezing conditions. A significant difference (p<0.05) was observed only on mouth-feel and overall acceptability throughout storage period. Samples stored at freezing condition at 4th week with mean scores of 8.3 (appearance); 8.0 (for each mouth-feel and aroma) and 8.3 (overall acceptability) was the most preferred next to the control sample. The use of local spice extracts in addition to the effects of refrigeration and freezing favor the shelf-stability of physico-chemical and sensory parameters of Kunun-zaki, thereby promote its keeping qualities during storage and distribution.
Microbial Quality of Kunnu-Zaki Beverage Sold in Ile-Ife, Osun State
O.A. Lawal
Journal of Food Technology , 2013, DOI: 10.3923/jftech.2012.4.7
Abstract: Fermented foods are estimated to constitute about a quarter of the foods consumed worldwide. These foods help in improving nutritional value and safety against bacterial pathogens. Pathogens have however been isolated from some fermented beverages and so, the microbial quality of Kunnu-zaki beverage produced and sold in some locations in Ile-Ife was determined. Five samples of kunnu were collected in duplicate from five different locations. Viable count, coliform count, isolation and characterization of isolates in the sample were done. Antibiotics susceptibility of the isolates was done thereafter. The kunnu samples were serially diluted and these were inoculated into nutrient agar, lactose and MacConkey broth for viable and coliform count, respectively. Isolation and characterization were done using various selective and differential media. The second sample has the highest viable count with 1.79x105 cfu mL-1. All the samples collected were positive for coliform count. Nine different enteric bacteria were isolated with 46.2% of the bacteria being coliform bacteria. The organisms isolated include Escherichia coli, Citrobacter freundi, Shigella sonnei, Salmonella sp. and Proteus mirabilis. Antibiotics sensitivity profile revealed that the most susceptible antibiotics to all the isolates was ofloxacin with 92.3% of the isolates sensitive to it while the least susceptible antibiotics was amoxicillin having 15.4% of the isolates sensitive to the antibiotics. Citrobacter freundii isolated from the first kunnu sample was resistant to all the antibiotics used while Providential alcalifaciens isolated from the third kunnu sample was sensitive to all the antibiotics.
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