Browsing by Author "De Silva, U."

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    Development of Finger millet (Eleusinecoracana) incorporated symbiotic drinking yoghurt
    (Uva Wellassa University of Sri Lanka, 2015) Awanthika, H.K.T.; Abesinghe, A.M.N.L.; De Silva, U.
    Sri Lankan yogurt market is characterized by intense competition prompting leading players to differentiate themselves by focusing on health benefits, branding, and incorporation of different ingredients. Yoghurt is a popular fermented dairy product due to its health benefits as a functional food in addition to its nutritional benefits (Robinson and Tamime, 1999). High calorie yogurt drink that contains any kind of a cereal powder is completely a new product concept to the Sri Lankan market. Therefore, the objective of the current study was to develop a health beneficial probiotic drinking yoghurt by incorporating finger millet as a cereal which can be used as a breakfast food, sport supplement and also as a weaned food for toddlers. Nutritionally, finger millet is used as a whole grain, it is higher in protein and minerals in comparison to all other cereals and millets. Accroding to previous studies, finger millet is also known for several health benefits such as anti-diabetic, antitumerogenic, atherosclerogenic effects, antioxidant and antimicrobial properties which are mainly attributed due to its polyphenol and dietary fiber contents (Dykes and Rooney, 2007; Chethan, 2008). Therefore this study was conducted to develop a cereal based probiotic yoghurt drink which can be promoted as a natural source of high calorie that can be consumed as an alternative for the imported, artificial and expensive sport nutrition’s and weaned foods. Methodology The study was conducted at the research and development and quality assurance laboratories in Ceylon cold stores PLC, Ranala, Kaduwela. In the preliminary trial 1 most compatible sugar percentages for different incorporation levels of finger millet flour from the three experimental forms (roasted flour, germinated flour and raw slurry) were selected. Then preliminary trial 2 was carried out using ranking method to select the best finger millet incorporation levels (4 %, 5 %, 6%, 7% and 8 % (w/w)) for each incorporation form. The best sugar percentages and incorporation levels of finger millet from preliminary trials were used in next steps of experiments. Sensory evaluation 1 was carried out to select the best form/type of finger millet flour to incorporate out of three forms. In second sensory evaluation, the most suitable stage for finger millet incorporation was determined by using two treatments. Each sensory evaluation was conducted with 30 untrained panellists and color, taste, aroma, mouth feel and overall acceptability were considered as sensory properties. Finally proximate analysis, physico- chemical and microbial analysis were conducted for the selected final probiotic drinking yoghurt by comparing with a control sample. Probiotc lactic acid bacteria enumeration was carried out using the selected final product by pour plating on MRS media to find out the effect of finger millet incorporation on the viability of probiotic lactobacilli. Selected final product was compared with a control sample and enumeration was done at 1, 7 and 14 days interval. The sensory data were analyzed using Friedman non-parametric test with 95% significance by using Minitab 16 software. Complete Randomized Design (CRD) was conducted and data obtained from chemical and microbiological tests were analyzed using analysis of variance (ANOVA) using the SAS 9.0 software. Significant means of treatments were separated using the Least Significant Difference test (LSD) (P< 0.05). Results and Discussion According to the results of the series of preliminary trials 5% (w/w) was selected as the best incorporation level from each three finger millet forms and 8 % (w/w) sugar as the compatible sugar percentage. In the first sensory evaluation for selecting best form/type of incorporation out of three experimental forms, germinated /malted flour incorporated yoghurt was selected as the best due to higher preference than other two. There was a significant difference (P<0.05) between treatments regarding and overall acceptability. Second sensory evaluation revealed, 5 % (w/w) germinated (malted) finger millet flour incorporated (Addition before fermentation) drinking yoghurt have the higher preference compared to the other treatment
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    Development of fruit (Musa spp.) puree incorporated synbiotic stirred yoghurt
    (Uva Wellassa University of Sri Lanka, 2015) Nanayakkara, G.H.; Abesinghe, A.M.N.L.; De Silva, U.
    Yoghurt is one of the most nutritious fermented milk products that can be used to enhance the nutrition condition of people. It is obtained by introducing specific strains of Lactic acid bacteria. The Lactic acid micro flora reduce risk of colon cancer (Foissy, 1983 cited in Huma, 2003), reduce the serum cholesterol level (Anderson and Gilliland, 1999 cited in Huma, 2003) and also maintain the intestinal ecosystem (Saarela et al., 2002 cited in Huma, 2003). Prebiotics are non-digestible food ingredients that improve the host health by selectively stimulating the growth of certain beneficial microorganisms. Fructo-oligosaccharide is prebiotic source that can be found in ripe banana around 2 mg/g. By incorporating banana with yoghurt is best way to improve the health benefits and taste of the yoghurt. Stirred type fruit yoghurt is one of the best products that can be used to gain consumer preference. Therefore, this study was conducted to develop a Banana puree incorporated symbiotic stirred yogurt. Methodology The current study was carried out at Ceylon Cold Stores PLC (CCS), Ranala, Kaduwela. Laboratory analysis was done at CCS and laboratories in University of Kelaniya. First, yoghurt base and the banana puree were prepared according to the predetermined recipe after various preliminary trials. For final sensory evaluation, three treatments were used with three replicates.