Assessment of the Effect of Drying Methods on Pumpkin (Telferia occidentalis) Leaves
International Journal of Computational and Theoretical Chemistry
Volume 5, Issue 4, July 2017, Pages: 42-45
Received: Jun. 10, 2017; Accepted: Jun. 30, 2017; Published: Aug. 2, 2017
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Muhammad Muktar Namadi, Department of Chemistry, Nigerian Defence Academy, Kaduna, Nigeria
Nwanya Uzoma Sarah, Department of Chemistry, Nigerian Defence Academy, Kaduna, Nigeria
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The effect of solar and sun drying on the nutritional composition of Telferia occidentalis was evaluated. Direct sun drying was carried out under the sun, while cabinet solar and tunnel solar dryer were used for the drying of the vegetable sample. Proximate and mineral analysis were carried out on the vegetable sample after drying for six days. The results of the proximate analysis showed relatively low moisture content across the three methods. The ash content ranged from 8.0% to 8.5%. The protein content ranged from 10.0% to 13.0% while carbohydrate content was from 66.6% to 67.0%. The result of mineral content of tunnel, cabinet solar drying and direct sun drying vegetable samples showed that the amount of Zn in the vegetable samples ranged from (0.02 to 0.07 mg/100 g), Ca ranged from (5.30 to 5.96 mg/100 g), Mg (0.33 to 0.35 mg/100 g) and Fe ranged from (0.38 to 1.27 mg/100 g). This study showed that tunnel solar dried vegetable samples had higher values of carbohydrate, protein and fiber content when compared with cabinet solar dried and direct sun dried vegetable samples. Mineral content of tunnel solar dried vegetable samples were also higher than cabinet solar and direct sun dried vegetable samples. It concludes that tunnel solar drying serves as a better method of drying because it retains more nutrients, relatively more hygienic with shorter drying time. It is thus recommended for adoption by farmers and market women.
Telferia occidentalis, Drying Methods, Proximate, Mineral, Solar
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Muhammad Muktar Namadi, Nwanya Uzoma Sarah, Assessment of the Effect of Drying Methods on Pumpkin (Telferia occidentalis) Leaves, International Journal of Computational and Theoretical Chemistry. Vol. 5, No. 4, 2017, pp. 42-45. doi: 10.11648/j.ijctc.20170504.11
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V. A. Aletor, and O. A. Adeogun. “Nutrients and antinutrient components of some tropical leafy vegetables,” Food Chem, vol. 54, pp. 375-379, 1995.
A. Ibarz, and G. V. Barboda-Canovas. “Unit operations in food engineering,” CRC, New York. pp. 18-21. 2000.
A. D. Hart, C. U. Azubuike, I. S. Barimalaa, S. C. Achinewhu, “Vegetable consumption pattern of households in selected areas of the old Rivers State in Nigeria,” Afri. J. Food and Nut, vol. 5, pp. 1-9, 2005.
J. T. Opabode, and O. C. Adeboye, “Application of biotechnology for the improvement of Nigerian Indigenous leaf vegetables,” Afri. J. Biotech, vol. pp. 138–142, 2005.
M. A. Karim, and M. N. Hawlader, “Mathematical modeling and experimental investigation of tropical fruits drying,” Int. J. Heat Mass Transf., vol. 48, pp. 914-925, 2005.
R. Perumal, “Comparative performance of solar cabinet, vacuum assisted solar and open sun drying methods.” A thesis for Award of MSc Degree at McGill University, Montreal, Canada, 2007.
C. H. Chong and C. L. Law, “Drying of Exotic Fruits, Vegetables and Fruits,” Singapore, vol. pp. 1 - 42, 2010.
I. Doymaz, “Drying of green bean and okra under solar energy.” Chem. Ind. Chem. Eng., vol. 17, pp. 199-205, 2011.
Association of Official Analytical Chemists (AOAC), “Official Method of Analysis”, Washington, DC, 2000.
P. S. Fellows, “Food processing technology: principles and practice,” Wood Head Rebleing Ltd. New York, pp. 65 – 310, 1997.
H. Dupriez, and P. Coener, “African garden and orchards growing vegetables and fruits,” Macmillan Press Limited, London, pp. 35- 46, 1992.
A. Morris, A. Barnett, and O, Burrows, “Effect of processing on nutrient content of foods: A handbook of vegetables and vegetable processing,” Asian J. Biochem., vol. 37, pp. 160–164, 2004.
E. Wachap, Effect of sun and shade on nutrient qualities of six seasonal green leafy vegetables uses in soups and dishes in Taraba State, Nigeria. PhD, thesis in nutrition presented to department of nutrition, University of Nigeria, Nsukka. 2005.
A. Ali, “Proximate and mineral composition of the marchubeh (Asparagus officinalis),” World Dairy and Food Science, vol. 4, pp. 142-149, 2009.
B. O. Isaac, A. A. Jerome, A. Micheal, and A. M. Sunday, “Effect of drying methods on the physicochemical properties of water leaf (Talinum triangulare),” Int. J. Biol. Chem. Sci. vol. 5, pp. 880-889, 2011.
P. O. Ukegbu, and C. J. Okereke, “Effect of solar and sun drying methods on the nutrient composition and microbial load in selected vegetables, African spinach (Amaranthus hybridus), fluted pumpkin (Telferia occidentalis) and okra (Hibiscus esculentus),” Sky J. Food Sci. vol. 2, pp. 35-40, 2013.
G. I. Onwuka, C. C. Nwabara, P. M. Nwokedi, C. A. Echendu, U. Asumugha, and M. U. Igboekwe, “Comparative studies of the efficacy of sun drying, solar dryer and hot air oven in the preservation of tomatoes, okra, pepper and onion,” Nig. Food J., vol. 20, pp. 10–14, 2002.
E. T. Ifon, O. Bassir, and G. O. Latunde-Dada, “The nutritive value of some Nigeria leafy vegetables, Vitamin and mineral content,” Food Chem., vol. 3, pp. 267-350, 2009.
A. C. Uwaegbute, “Vegetables; nutrition and utilization in food crops production, utilization and nutrition,” in: Mbah, BN, Nnanyelugo DO (eds) Dotan Publications Limited, Ibadan, pp. 208-212, 1989.
O. M. Kolawole, A. E. Ayiboye, E. E. Aturu, and I. I. Anibijuwun, “Effect of solar drying on the proximate and microbial composition of Abelmoschus esculentus,” J. Microbial Biotech. Res., vol. 1, pp. 71 – 81, 2011.
C. Rossello, A. Berna and A, Mulet, “Solar drying of fruits in a Mediterranean climate,” Drying Technol., vol. 8, pp. 30 –32, 2000.
J. A. Klaus, “Definition of Heavy Metals and Their Role in Biological Systems,” in: Soil Heavy Metals, Soil Biology, Shermeti, I. & Varma, A. (eds.), Germany: Springer-Verlag Berlin Heidelberg. pp. 11, 2010.
J. N. Okoli, “Basic nutrition and diet therapy,” University of Nigeria press Ltd. UNN Nigeria, p. 74, 2009.
D. J. Oyedele, C. Asonugho, and O. O. Awotoye, “Heavy metals in soil and accumulation by edible vegetables after phosphate fertilizer application,” Elect. J. Agric. food chem., vol. 5, pp. 1446-1453, 2006.
S. W. Hassan, R. A. Umar, H. M. Maishanu, and A. A. Sani, “The Effect of Drying Method on the Nutrients and Non-nutrients Composition of Leaves of Gynandropsis gynandra (Capparaceae),” Asian Journal of Biochemistry, vol. 2, pp. 349-353, 2007.
M. T. Ruel, “Can food based strategies help reduce vitamin a and iron deficiencies,” A review of recent evidence food policy. New York. Am. Food J. vol. 8, pp. 26–28, 2001.
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