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Effect of Pectinase on the Physico-Chemical Properties of Juice from Pawpaw (Carica papaya) Fruits

Authors: Idoko J. O., Achusi N.


A procedure for the preparation of clarified Pawpaw Juice was developed. About 750ml Pawpaw pulp was measured into 2 measuring cylinders A & B of capacity 1 litre heated to 400C, cooled to 200C. 30mls pectinase was added into cylinder A, while 30mls distilled water was added into cylinder B. Enzyme treated sample (A) was allowed to digest for 5hours after which it was heated to 900C for 15 minutes to inactivate the enzyme. The heated sample was cooled and with the aid of a mucillin cloth the pulp was filtered to obtain the clarified pawpaw juice. The juice was filled into 100ml plastic bottles, pasteurized at 950C for 45 minutes, cooled and stored at room temperature. The sample treated with 30mls distilled water also underwent the same process. Freshly pasteurized sample was analyzed for specific gravity, titratable acidity, pH, sugars and ascorbic acid. The remaining sample was then stored for 2 weeks and the above analyses repeated. There were differences in the results of the freshly pasteurized samples and stored sample in pH and ascorbic acid levels, also sample treated with pectinase yielded higher volumes of juice than that treated with distilled water.

Keywords: Juice, pawpaw, pectinase.

Digital Object Identifier (DOI):

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[1] J. J. Ochse, M.J. Soule, M. Dijkman and C. Wehlburg. The papaya in tropical and subtropical Agriculture, 1980. Macmillan Co. London pp 586-589
[2] V.H. Heywood Cotyledon families in the flowering plant of the world, 1978. Oxford University Press, Oxford London, p 105
[3] J.C. Okafor. The place of wild fruits and vegetables in Nigeria diet. In Agriculture in Nigeria – an introduction, 1975, FAO home, pp 5-6
[4] Simmond, Fruit juices and soft drinks in food industry manual (1984). Kapitan Szabo Publishers Washington D.C., pp 244-251
[5] D. Pearson, Pearson’s Composition and Analysis of Foods, 9th edition, Longman Scientific Publishers 1991
[6] AOAC Official Methods of Analysis of the Association of Analytical Chemists, 14th edition Washington DC, 1980
[7] A.N. Spiranagarajain and A.J. Shrikhande, Comparative aspects of pectin extracted peels of different varieties of mango, 1979, J. Fd Technol, 14 (3) pp 277-287
[8] P.G. Inon, E. Balogh and P.O. Ngoddy Agbolumo, Pectin: Extraction and properties, 1977. Proceedings of the launching and first annual conference of NIFST Vol. 1 pp 61-67