9th International Science Congress (ISC-2019).  International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Assessing the Effects of Drying on the Functional Properties and Protein Solubility of some Edible Tropical Leafy Vegetables

Author Affiliations

  • 1Department of Chemistry, The Federal University of Technology, P.M.B. 704, Akure, Ondo State, NIGERIA

Res.J.chem.sci., Volume 3, Issue (2), Pages 20-26, February,18 (2013)

Abstract

Green amaranth (Amaranthus hybridus), Scent leaf (Ocimum gratissimum), Basil leaf (Ocimum basilicum), Bitter leaf (Vernonia amygdalina) and Fluted pumpkin leaf (Telferia occidentalis) were subjected to sun-drying and freeze-drying. The pulverized samples were divided into two portions, first portion analysed for functional properties while protein solubility was determined on the second portion. The water absorption capacity, WAC in sun-dried leaves varied from 141.20.2% in A. hybridus to 162.10.1% in T. occidentalis. Foaming capacity and stability varied from 17.7; 1.0% in O. gratissimum; V. amydgalina to 96.8; 5.0% in A. hybridus and T. occidentalis respectively while the result on least gelation showed little or no variation in all samples. The freeze-dried samples had significantly higher (at P<.05 level) foaming capacity and foaming stability but lower water absorption capacity, swelling power, solubility and bulk density (loose and packed) than the sun-dried samples. All samples analyzed showed varying solubilities at different pH range.

References

  1. Edema A.O., Production of some common vegetables, Hort Res. Inst. Ibadan Nigeria, 5(2), 1-5 (1987)
  2. Mnzava N.A., Comparing nutritional values exotic and indigenous vegetables, In: Proceedings of a workshop on indigenous vegetables, Limbe Cameroon, January 1997, Schippers RR, Budd L (eds), Chatham, UK; NRI/IPGRI/CPRO workshop (1997)
  3. Fasuyi A.O., Nutritional potentials of some tropical vegetable leafmeals: chemical characterization and functional properties, Afr. J. Biotechnol., 5(1), 49-53 (2006)
  4. Okafor J.C., Horticulturally promising indigenous wild plantspecies of the Nigerian forest zone Acts, Horticulture, 123, 165-177 (1983)
  5. Okoli E.C., Nmorka O.O. and Unaegbu S.A., Blanching and Storage of some Nigerian Vegetables, Int. J. Fd. Sc. Tech., 23, 639-641 (1988)
  6. Kumari M. and Jains S., Tannins: An antinutrient with positive effect to manage Diabete, Res. J.Chem. Sci., 31-37 (2012)
  7. Mensah J.K., Eifediyi K., Ohaju-Obodo J.O. and Okoli R.I., Phytochemical, Nutritional and Medical Properties of Some Leaf Vegetables Consumed by Edo People of Nigeria, Afri. J. Biotech., 7(14), 2304-2309 (2008)
  8. Adeboye A.S. and Babajide J.M., Effect of Processing Methods on Anti-nutrients in Selected Leafy Vegetables, Nig. Fd. Journal, 25(1), 77-87 (2007)
  9. Hassan S.W., Abbas A.Y., Maishanu H.M., Matazu I.K., Sani A.A. and Umar I.K., The Effect of Drying Method on the Nutrients and Non-Nutrients Composition of Leaves of Leptadenia hastate, Asian J. Biochem., 2, 188-192 (2007)
  10. Oguntona T., Green Leafy Vegetables: Nutritional Quality of Plant Foods, 120-13 (1988)
  11. Zofia L., Emilia B., Piotr G. and Waldemar K., Retention of Mineral Constituents in Frozen Leafy Vegetables Prepared for Consumption, J. Fd. Comp and Analy., 22(3), 218-223 (2009)
  12. Sajal M.P., PAT for Freeze-Drying: Determination of End Point of Primary Drying, Dept. of Formulation Sciences Medimmune, LLC (2010)
  13. Vander-Walt A.M., Bezuidenhout C.C., Ibrahim M.I.M. and Loots D.T., Minerals, Trace Elements and Antioxidant Phytochemicals in Wild African Dark-green Leafy Vegetables, South African J. Sci., 105, 11-12 (2009)
  14. Ali H.I., Irvan D., Mohd A. and Arezoo F.D., Comparative Study on Characterisation of Malaysian Palm Oil Mill Effluent, Res.J. Chem. Sci., 2(12), 1-5 (2012)
  15. Beuchat L.R., Functional and electrophoretic characterization of succinylated peanut flour protein, J.Agric. Fd. Chem., 25, 258-26 (1977)
  16. Sosulko F.W., The centrifuge method of determining flour absorption in hard red spring wheat, Cereal Chemistry, 39, 344-350 (1962)
  17. Coffman C.W. and Garcia V.V., Functional properties and amino acid content of a protein isolate from mungbean flour, J. Fd. Tech., 12, 473-484 (1977)
  18. Oshodi A.A. and Aletor V.A., Functional properties of haemagglutinine (Lectins) extracted from three edible varieties of lima beans (phaseolus), Intern. J. Fd Sci and Nutri., 44, 133-136 (1993)
  19. Duncan D.B., Multiple range and Multiple of Tests Biometrics, (1955)
  20. Morabanda C.J., Ongoka R.P., Matini L., Epa C., Nkounou L.C and Abena A.A., Chemical composition of Mesocarp of Garcinia Kola Heckel (clusiaceae) fruit, Res.J Recent Sci., 2(1), 53-58 (2013)
  21. Garole D.J and Sawant A.D., Recovery of Nickel and Oil from spent Nickel Hydrogenation Catalyst, Res.J. Chem. Sci., 2(12), 27-30 (2012)
  22. Fagbemi T.N. and Oshodi A.A., Chemical composition and Functional Properties of Full-fat fluted Pumpkin Seed Flour (Telferia occidentalis), Nig. Fd. J., 9, 26-32 (1991)
  23. Olaofe O., Adediran G.O and Umar Y.O., The effect of Nematicides on the Nutritive Value and Functional Properties of Cowpea seeds (Virginia unguiculata L.walp), Food Chem., 46, 337 (1999)
  24. Landry F., Protein Solubility, Purification and Analysis, Biochemistry 601, John Wiley and Sons, New York (1990)
  25. Ng W.K. and Wee K.L., The Nutritive Value of Cassava Leaf Meal in Pelleted Feed for Nile Tilapia, Aquaculture, 83, 45-58 (1989)
  26. Reddy L., Chandra S., Reddy K.V., Ramana J.K and Humane S.K., Distribution of Trace Element in Coconut water from Barite Nineralized Zone, Cuddapah District, Andhra Pradesh lndia, Int.Res. Enviroment Sci., 1(5) 22-26 (2012)