Browsing by Author "Adegoke, Gabriel"

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    Functionality of Aframomum Danielli Seed Powder Extract in Glycemic Load of Soymilk-Based Juice
    (American Journal of Food Science and Technology,, 2014-07-04) Dauda, Adegbola; Adegoke, Gabriel
    Spices are important supplements added to food as flavouring agents and/or a preservative and have been in use all over the world for thousands of years. Various additives have been utilised over the years to spice our food products. Synthetic additives, which have been in use, have come with various side effects, hence the need to shift focus to the use of natural ones. Research into the production and utilization of indigenous food additives on a large scale has not been undertaken in Nigeria. Even its utilization in food products to prevent or reduce food related ailments or diseases have not really been done. This present work investigates the health benefits of the spice’s extract on the glycemic load (GL) of the juice to consumers. Standard method was used for extraction of juice from carrot, watermelon and pawpaw. Standard method [8] was equally used for the proximate composition (moisture content, protein, fat, carbohydrate, crude fibre and ash), while soymilk was made from soybeans under laboratory condition. The juices from the vegetable (carrot), fruits (watermelon and pawpaw), and soymilk were blended in equal ratios and thereafter treated with A. danielli extract (1g-3g). Glycemic load (GL) of the samples was determined by multiplying the weighted average of the glycemic indexes (GIs) of the mixed meal by the available carbohydrate and dividing the product by 100. Available carbohydrate was determined by subtracting the fibre content from the total carbohydrate. GL of untreated samples was 10.26, while treated samples recorded low values (6.11-7.20). Standard values were 1-10, low GL; 10.1-20, medium GL; above 20.1 and above, high GL. The outcome of the work could assist in utilising local spices for the full benefit of consumers.
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    Microbiological and Sensory Profile of Soymilk Based Juice Treated with Liquid Extract of A. Danielli</
    (American Journal of Food Science and Technology,, 2014-10) Dauda, Adegbola; Adegoke, Gabriel
    The microbiological and sensory profile soymilk-based juice treated with aqueous extract of Aframomum danielli (1%-3%-w/v) and stored at 27±2°C for twenty four weeks were examined. Synthetic additives/preservatives, which have been in use over the years, are more expensive and mostly imported with hard earned scarce foreign exchange. Adequate research work into the production and utilization of indigenous food additives on a large scale has not been undertaken in developing countries. This work was therefore planned to ascertain the usefulness of extracts of A. danielli, a local spice, in stabilizing the microbiological quality of soymilkbased juice. Standard methods were used for the production of juice samples from pineapple, orange, carrot and milk from soybeans. They were blended together in equal proportion and thereafter treated with A. danielli extract (1.0% to 3.0%) and stored at 27+2°C for twenty four weeks. Infrared spectrophotometer was used to identify functional groups in Aframomum danielli and hence the active components responsible for the stability of the juice. Standard AOAC method was used for microbiological analysis of treated and untreated samples. Consumer evaluation of juice samples was done using analysis of variance (ANOVA). Some of the active components of the spice identified are 4-amino-acetophenone, N,N-dimethyl-2-chloroacetoacetamide, 3-beta-acetoxy-5-etienic acid, 6,10- dimethylundeca-5,9,-diene2-one, Phenyl-3-buten and 4-Phenyl butanone. There were significant differences in the microbial counts of the treated and untreated samples. Treated samples experienced little or no growth over the period of storage. The results validate previous reports that A. danielli extract has great preservative potentials. There were significant differences (P < 0.5) for colour and overall acceptability of the samples. When A. danielli extract was added to soymilk-based fruit juice, the microbiological and sensory qualities were found to be better preserved than that of the untreated samples.
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    Preservation of Some Physico-Chemical Properties of Soymilk-Based Juice with Aframomum Danielli Spice Powder
    (American Journal of Food Science and Technology,, 2014-08) Dauda, Adegbola; Adegoke, Gabriel
    The effect of Aframomum danielli powder on the shelf life of physico-chemical properties of soy-milk based juice was studied. In this paper, attempt was made to investigate the preservative effect of the powder of Aframomum danielli, a local spice, on the physico-chemical properties of blends of soymilk and juices from fruits and vegetable by prolonging its shelf life. This was done by adding 0.5-3.0grams of the spice powder to every 200ml of the blend, while the control samples had no spice. The juice quality was analyzed for sensory attributes and physico-chemical parameters over six month’s period of storage at interval of four weeks. Sensory evaluation of the juices was judged for colour, flavour, taste and general acceptability, on a nine-point hedonic scale, varying from “dislike extremely” (score 1) to “like extremely” (score 9), according to the method of [39]. Ten (10) untrained panel members carried out the sensory evaluation. Infrared spectrophotometer was used to identify functional groups in the powder of the spice, Aframomum danielli, responsible for the stability of the juice. Differences were observed in the colour and aroma of treated samples in comparison with the control, though the samples were generally accepted. The percentage losses recorded for the total soluble solids, ascorbic acids and total sugars of treated samples were far lesser than those of control over the same condition and period of storage. Some of the active components of the spice identified are 4-amino-acetophenone, N,N-dimethyl-2-chloroacetoacetamide, 3-beta-acetoxy-5-etienic acid, 6,10-dimethylundeca-5,9,-diene2-one, Phenyl-3-buten and 4-Phenyl butanone. The samples treated with the Aframomum danielli powder were better preserved than the untreated ones (control).