International Journal of Processing and Post harvest Technology

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Effect of Pre-Treatments and Drying Methods on Nutrient Composition and Sensory Quality of Milk Yam (Ipomoea digitata L.) Tuber Powder


Affiliations
1 Department of Plantation Crops and Spices, College of Agriculture (K. A.U.), Vellayani (Kerala), India
     

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Milk yam (Ipomoea digitata L.) (Family-Covolvulaceae) or Ksheervidari is a potential medicinal cum nutraceutical agent. It is a perennial climber having tuberous ischolar_mains which are medicinal. Dried and powdered tubers are used in several nutraceutical preparations. The present study focussed on different pre-treatments and drying techniques that can be adopted for improving the flour whiteness and quality of milk yam tuber powder. Peeled as well as non-peeled tubers were shredded and washed (three times, two times, single time and no washing), de-watered by keeping in bamboo basket. These tuber shreds were dried under sun and in a hot-air oven (60°C, 70°C and 80°C). The samples were evaluated for micronutrients, non-nutrient but beneficial components as well as sensory quality attributes.Milk yam tuber powder prepared by three times washed peeled tuber shreds dewatered by keeping in bamboo basket and dried in hot-air oven at 60°C recorded optimum micronutrients, non-nutrient but beneficial components and sensory (overall visual quality – OVQ) quality attributes. Micronutrients composition include, calcium-3.40 mg/100g, iron-2.47 mg/100g, sodium-2.53 mg/100g, high vitamin A (613.33μg/100g) and vitamin C (7.43 mg/100g). Non-nutritional but beneficial components viz., crude fibre-7.13 g/100g and total ash-3.56 g/100g. Mean rank value for the overall visual quality (OVQ) is 288.55.

Keywords

Beneficial Components, Ksheervidari, Micronutrients, Nutraceutical, Overall Visual Quality.
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  • Adeleke, R. O. and Odedeji, J. O. (2010). Functional properties of wheat and sweet potato flour blends. Pakistan J. Nutr., 9 (6) : 535.

  • Alam, M. K., Rana, Z. H. and Islam, S. N. (2016).Comparison of the proximate composition, total carotenoids and total polyphenol content of nine orange fleshed sweet potato varieties grown in Bangladesh. Foods, 5(3) : 64. Retrieved from http://www.mdpi.com/2304-8158/5/3/64/htm.

  • AOAC [Association of the Official Agricultural Chemists]. (2000). Official method of analysis (17th Ed.). Association of the Official Agricultural Chemists, Washington, D.C.

  • Chua, K. J. and Chou, S. K. (2003). Low-cost drying methods for developing countries. Trends Food Sci. Technol., 14 : 519-528.

  • Fabbri, A. D. T. and Crosby,G. A. (2016).A review of the impact of preparation and cooking on the nutritional quality of vegetables and legumes. Internat. J. Gastronomy &Food Sci., 3 : 2-11.

  • Fekadu, H., Beyene, F. and Desse, G. (2013).Effect of traditional processing methods on nutritional composition and anti-nutritional factors of Anchote (Coccinia abyssinica Lam. (Cogn.) tubers grown in western Ethiopia. J. Food Proc. & Technol., 4 : 249.

  • Gomez-Lopez Vincente. M. (2012).Decontamination of fresh and minimally processed produce. Wiley-Blackwell: Oxford, U. K.

  • Grabowski, J.A., Truong, V. D. and Daubert, C.R. (2008). Nutritional and rheological characterisation of spray dried sweet potato powder. LWT – Food Science & Technology. e – J., 41 : 206 – 216. Retrieved fromhttps://pubag. nal.usda.gov/pubag/downloadPDF.xhtml?id=17240&content=PDF.

  • ICARDA [International Center for Agricultural Research in the Dry Areas]. (2013). Methods of soil, plant and water analysis: A Manual for the West Asia and North Africa Region [on-line]. Retrieved fromhttps://www.google.co.in/search?q=Methods of Soil, Plant and Water Analysis_A manual for the West Asia and North_Africa region.pdf.

  • Ihekoronye, A. I. and Ngoddy, P. O. (1985). Integrated food science and technology for the tropics. Macmilian Publishers, NEW YORK, U.S.A.

  • Ikanone, C. E. O. and Oyekan, P. O. (2014). Effect of boiling and frying on the total carbohydrate, vitamin C and mineral contents of Irish (Solanum tuberosum) and sweet potato (Ipomoea batatas) tubers. Nigerian Food J.,32(2):33-39.

  • Jonnalagadda, P. R., Bhatt, R. V., Sudershan, R.V. and Naidu, A. N. (2001). Suitability of chemical parameters in setting qualitystandard for fried snacks. Food Quality & Preference, 12 : 223-228.

  • Khan, M.S., Nema, N., Kharya, M. D. and Khanam, S. (2009). Chromatographic estimation of maturity based phytochemical profiling of Ipomoea mauritiana. Internat. J. Phytomedicine, 1 : 22-30.

  • Knuckles, B. E., Bickoff, E. M. and Kohler, G. O. (1972). Proxan process: Methods of increasing protein recovery from Alfalfa. J. Agric. & Food Chem., 20 : 1055 - 1057.

  • Lawless (1995). Sensory evaluation of food. Springer link Publishers, USA.

  • Lyimo, M. E., Gimbi, D. M. and Kihinga, T. (2010). Effect of processing methods on nutrient content of sweet potato varieties grown in lake zone of Tanzania. Tanzania J. Agric. Sci.,10 (1) : 55-61.

  • Mahan Kathleen, L. and Escott-Stump Sylvia (2004).Krause’s Food, nutrition and diet therapy. The Curtis Center, U. S. A.

  • Manay, N. Shakuntala and Shadaksharaswamy, M. (2008). Food facts and principles (Indian Reprint, 2016). New Age International (P) Ltd. Publishers,NEW DELHI, INDIA.

  • McCleary, B. V. (1999). Enzyme purity and activity in fibre determinations. Cereal Food World, 44 : 590-596.

  • NIN (Nutrition Institute of India) (1971). Nutritive value of Indian Foods (Indian Reprint, 2009). National Institute of Nutrition, Indian Council of Medical Research, Hyderabad, India.

  • Pinheiro-Santana, H. M., Stringheta, P. C., Brandao, S.C. C., Paez, H. H. and de Queiroz, V. M. V. (1998).Evaluation of total carotenoids, β – and β – carotene in carrots (Daucus carota L.) during home processing. Food Sci. & Technol., (Campinas), 18 (1) : 1-15.

  • Ruttarattanamongkol, K., Chittrakorn, S., Veerawatanakorn, M. and Dangpium, N. (2016). Effects of drying methods on physico-chemical characteristics, anthocyanin, beta-carotene and antioxidant activity retentions of purple and orange fleshed sweet potato flours. J. Food Sci. & Technol., 53(4) : 1811-1822.

  • Sadasivam, S. and Manickam, A. (1992).Biochemical method for agricultural sciences.Wiley Eastern Limited and Tamil Nadu Agricultural University, Coimbatore (T.N.) INDIA.

  • Salawu, S. O., Udi, E., Akindahunsi, A.A., Boligon, A.A. and Athayde, M. L. (2015). Antioxidant potential, phenolic profile, nutrient composition of flesh and peels from Nigerian white and purple skinned sweet potato (Ipomoea batatas L.). Asian J. Plant Sci. & Res., 5(5) : 14-23.

  • Santos, P. H. S. and Silva, M. A. (2008). Retention of vitamin C in drying processes of fruits and vegetables – A review. Drying Technol., 26 (12) : 1421-1437.

  • Seidu, J. M., Bobobee, E. Y. H., Kwenin, W. J. K., Tevor, W. J., Mahama, A. A. and Agbeven, J. (2012).Drying of sweet potato (Ipomoea batatas) (chipped and grated) for quality flour using locally constructed solar dryers. ARPN J. Agric. & Biological Sci., 7 (6) : 466-473.

  • Sonia, N.S. and Jessykutty, P. C. (2017). Antioxidant potential of health mix powder prepared using milk yam (Ipomoea digitata L.) [abstract]. In: Research in Present Scenerio (RESCON 2017) – Multidisciplinary National Conference; 27, January, 2017, Nesamony Memorial Christian College, Marthandam, Kanyakumari, p.65. Abstract No. BO 04.

  • Sonia, N.S., Vidya, K.M. and Jessykutty, P.C. (2017). Ksheervidari (Ipomoea digitata L.) an underutilised medicinal plant – an update. Internat. J. Medicine & Pharmaceutical Sci., 7 (1) : 47-60.

  • Stone Herbert and Sidel, L. Joel (1993). Sensory evaluation practices (2nd Ed.). Food and Science Technology Series, Academic Press, California.

  • USDA [United States Department of Agriculture]. (2017). USDA Food composition databases [on line]. Retrieved from https://ndb.nal.usda.gov/ndb/nutrients/index.

  • Venkatasubramanian, P., Kumar, S. K. and Venugopal, S. N. (2009). Use of ‘Kshiravidari’ as a substitute for ‘Vidari’ as per Ayurvedic descriptions. Indian J.Tradit. Knowledge, 8 : 310-318.

  • Von Elbe, J. H. and Schwartz, Steven J. (1996). Colorants. In: Fennema, O. R. (Ed.), Food Chemistry. Marcel Dekker, NEW YORK, U.S.A.

  • Yuan, G., Sun, B., Yuan, J. and Wang, Q. (2010). Effect of 1-methylcylcopropene on shelf-life, visual quality, antioxidant enzymes and health promoting compounds in Broccoli florets. Food Chem., 118 : 774 – 781.


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  • Effect of Pre-Treatments and Drying Methods on Nutrient Composition and Sensory Quality of Milk Yam (Ipomoea digitata L.) Tuber Powder

Abstract Views: 382  |  PDF Views: 0

Authors

N. S. Sonia
Department of Plantation Crops and Spices, College of Agriculture (K. A.U.), Vellayani (Kerala), India
P. C. Jessykutty
Department of Plantation Crops and Spices, College of Agriculture (K. A.U.), Vellayani (Kerala), India
G. S. Sreekala
Department of Plantation Crops and Spices, College of Agriculture (K. A.U.), Vellayani (Kerala), India

Abstract


Milk yam (Ipomoea digitata L.) (Family-Covolvulaceae) or Ksheervidari is a potential medicinal cum nutraceutical agent. It is a perennial climber having tuberous ischolar_mains which are medicinal. Dried and powdered tubers are used in several nutraceutical preparations. The present study focussed on different pre-treatments and drying techniques that can be adopted for improving the flour whiteness and quality of milk yam tuber powder. Peeled as well as non-peeled tubers were shredded and washed (three times, two times, single time and no washing), de-watered by keeping in bamboo basket. These tuber shreds were dried under sun and in a hot-air oven (60°C, 70°C and 80°C). The samples were evaluated for micronutrients, non-nutrient but beneficial components as well as sensory quality attributes.Milk yam tuber powder prepared by three times washed peeled tuber shreds dewatered by keeping in bamboo basket and dried in hot-air oven at 60°C recorded optimum micronutrients, non-nutrient but beneficial components and sensory (overall visual quality – OVQ) quality attributes. Micronutrients composition include, calcium-3.40 mg/100g, iron-2.47 mg/100g, sodium-2.53 mg/100g, high vitamin A (613.33μg/100g) and vitamin C (7.43 mg/100g). Non-nutritional but beneficial components viz., crude fibre-7.13 g/100g and total ash-3.56 g/100g. Mean rank value for the overall visual quality (OVQ) is 288.55.

Keywords


Beneficial Components, Ksheervidari, Micronutrients, Nutraceutical, Overall Visual Quality.

References