Evaluation of different quality parameters of goat milk yoghurt developed using selected lactic acid bacteria

ABSTRACT

The present study was undertaken to develop yoghurt from goat milk and to assess its sensory, chemical, microbiological and storage quality. Three different cultures were tried and incubation temperatures viz. 30, 37 and 420C were selected. Yoghurt was prepared using 3% mixed culture containing Streptococcus thermophillus and Lactobacillus bulgaricus NCDC 144 in the ratio of 1:1. The product was prepared in five replicates and analysed for sensory attributes such as flavor, body and texture, colour and appearance and overall acceptability on 9-point hedonic scale by a panel of five judges. Based on overall acceptability of the product, the best incubation temperature (420C) was selected. The product prepared with optimized incubation temperature was further subjected for chemical, microbiological and storage quality. It was observed that goat milk yoghurt contains less percentage of total solids and higher titrable acidity than cow milk yoghurt. The sensory and microbiological quality of the product was evaluated on 0, 3, 6 and 9 days at refrigeration temperature (4±10C) to assess the storage stability of the product. The sensory attributes change significantly (p£0.05) after 9th day of storage in control and developed product both. The product had total plate count of 106 cfu and decreased significantly (p£0.05) after 9th day of storage (104 cfu/g). The coliform and yeast and mould count were not detected, both in control and developed product throughout storage period. It may be concluded that good quality goat milk yoghurt can be prepared by using mixed culture at 3% concentration with incubation temperature of 420C for 8 hours.

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REFERENCES

Abou-Dawood, A.E., Abd-Rabo, F.H., Ahmed, N.S. and Hassan, F.A.M. (1993). Manufacture of yoghurt from goats’ milk. Egyptian Journal of Dairy Science, 21(1): 21-33.
Abrahamsen R.K. (1978). The content of lactic acid and acetaldehyde in yogurt at different temperatures. XX. International Dairy Congress E., 829-830.
Aggarwal, M.L. (1974). Manufacturing yogurt from goat milk. Cultured Dairy Products Journal, 9(3): 10-12.
AOAC, (1990). Official Method of Analysis. 15th Edition, Association of Official Analytical Chemist, Arlington, Virginia
APHA, (1982). “Microscopic method of analysis” in Standard methods of bacteriological analysis of milk. American Public Health Association, 8: 1315.
Arora, R., Bhijak, N., and Joshi R. (2013). Comparative aspects of goat and cow milk. International Journal of Engineering Science Invention, 2(1): 7-10.
Baltadjeva, M., Tchoroleva, M. and Panayotov, P. (1989). Production of yoghurt from goat milk. Quaderni dell’Istituto Lattiero Caseario di Thiene, 18: 66-68.
Bano, P., Abdullah, M., Nadeem, M., Babar, M.E. and Khan, G.A. (2011). Preparation of functional yoghurt from sheep and goat milk blends. Pakistan Journal of Agricultural Science, 48(3): 211-215.
Bozanic, R. and Tratnik, L. (1997). Dairy Science Abstracts, 59: 188.
Bozanic, R., Tratnik, L. and Parat, M. (2001). Acceptability of yoghurt and probiotic yoghurt from goat’s milk. Mljekarstvo, 51(4): 317-326.
Broadway, A.A. and Biju, L.S. (1998). Allahabad Farmer Journal, 52(1):1-7.
Cho-Ah-Ying, F., Duitschaver, C.L. and Buteau, C. (1990). Production of yoghurt by different thermophilic starter culture. Cultured Dairy Products Journal, 25(3): 11.
Cooke, T. (2010). Benefits of goat milk vs. cow milk. Journal of Dairy Research, 45: 55-59.
Dardashti, A. D., Afshin, A., Saeed, B., Grce, M., Pigac, J. and Marsa, V. (2001). Study of coliform, yeast and mold contamination of yogurt in Ghaemshahr in lran. Periodicum Biologorum, 103: 183-186.
De Vuysta, L., Zamfira, M., Mozzia, F., Adrianya, T., Marshalld, V., Degeesta, B. and Vaningelgema, F. (2003). Exopolysaccharide- producing Streptococcus thermophilus strains as functional starter cultures in the production of fermented milks. International Dairy Journal, 13: 707–717.
Duboc, P., and Mollet, B. (2001). Applications of exopolysaccharides in the dairy industry. International Dairy Journal, 11: 759–768.
Ehirim, F.N. and Onyeneke, E.N. (2013). Physico – chemical and organoleptic properties of yoghurt manufactured with cow milk and goat milk. Academic Research International, 4(4): 245-252.
Eissa, E.A., MohamedAhmed, I.A., Yagoub, A.E.A. and Babiker, E.E. (2010). Physicochemical, microbiological and sensory characteristics of yoghurt produced from goat milk. Livestock Research for Rural Development, 22(8): 137-138.
FAOSTAT (2014). Available at: http://www.fao.org/faostat/en/#data/QA Date: 3rd February 2017
Farooq K. and Haque. Z.U. (1992). Effect of sugar esters on the textural properties of non-fat low calorie yogurt. Journal of Dairy Science, 75: 2676-2680.
Haenlein, G.F.W. (2004). Goat milk in human nutrition. Small Ruminant Research, 51: 155–163.
Hanif, M.S., Zahoor1, T., Iqbal, Z., Haq, I. and Arif, A.M. (2012). Effect of storage on rheological and sensory characteristics of cow and buffalo milk yogurt. Pakistan Journal of Food Sciences, 22(2): 61-70.
Isanga J. and Zhang G.N., (2008). Screening of stabilizers for peanut milk based set yoghurt by assessment of whey separation, gel firmness and sensory quality of yoghurt. American Journal of Food Technology, 3:127-33.
Loewenstein, M., Speck, S.J., Ferguson, R. and Cooper, G. (1978) Utilization of all the milk solids in manufacturing consumer products from goat milk. Journal of Dairy Science, 61(1): 222.
Mahdian, E. and Tehrani, M.M. (2007). Evaluation the effect of milk total solids on the relationship between growth and activity of starter cultures and quality of concentrated yoghurt. American-Eurasian Journal of Agriculture and Environmental Sciences, 2(5): 587- 592.
Manjunath, N. and Abraham, M.J. (1986). Yoghurt from goat milk. Asian Journal of Dairy Research, 5(2): 103-107.
Manjunath, N., Bilancia, M.T., and Chavan, K. D. (1982). Dairy Science Abstract.:556
Mathur M.P., Roy D.D. and Dinkar P., (1999). Text Book of Dairy Chemistry. Directorate of Information and Publications of Agriculture, New Delhi, India; 1999.
Mohammeed H.A., Abu-Jdayil, B. Al- Shawabkeh. A. (2004): Effect of solid concentration on the rheological properties of Labneh (concentrated yoghurt) produced from sheep milk. Journal of Food Engineering, 61: 347-352.
Mottar J., Waes, G., Moermans, R., Navdts, M. (1979): Sensoric changes in UHT milk during uncooled storage. Milchwissenscheft, 34: 257-262.
Nahar, A., Al-Amin, M., Alam, S.M.K., Wadud, A. and Islam M.N. (2007). A comparative study on the quality of yoghurt prepared from cow, goat and buffalo milk. International Journal of Dairy Science, 2(3): 260-267.
Nelson, J.A. and Trout, G.M. (1964). Judging Dairy Products. 4th Edn. Olsen Publi. Co., Milwaukee.
Palanidorai, R., Akila, N. and Sivakumar, T. (2009). Goat milk dahi. Tamilnadu Journal of Veterinary and Animal Sciences, 5(3): 114-115.
Pette, J.W. and Lolkema, H. (1950). Yogurt. II: Growth stimulating factors for S. thermophilus. Netherlands Milk Dairy Journal, 4(3):209.
Ranganadham, M. and Gupta, S.K. (1987). Sensory evaluation of dahi and yoghurt. Indian Dairyman, 39(10): 493-497.
Sakore, D.B., Dhole, P.T., Chavan, K.D. and Pawar, B.K. (2007). Role and viability of probiotic cultures in cow milk dahi. Journal of Dairying, Foods & Homescience, 26(2): 63-68.
Salwa A.A., Galal E.A., Elewa. N.A. (2003): Carrot yoghurt: sensory, chemical, microbiological properties and consumer acceptance. Pakistan Journal of Nutrition, 3: 322-330.
Sanna, M.G., Mangia, N.P., Garau, G., Murgia, M.A., Massa, T., Franco, A. and Deiana, P. (2005). Selection of folate-producing lactic acid bacteria for improving fermented goat milk. Italian Journal of Food Science, 17(2): 143-154.
Seelee, W., Tungjaroenchai, W. and Natvaratat, M. (2009). Development of low fat set-type probiotic yoghurt from goat milk. Asian Journal of Food and Agro-Industries, 2(4), 771-779.
Sheikh, N. M., Joarder, G. K., Haroon, S. N., and Khatoon, M. (1970). Bacteriology of dadhi [dahi]: I. Qualitative and quantitative studies of microflora of dadhi. Scientific Researches, East Regional Laboratories Pakistan Council for Scientific and Industrial Research, 7(1), 1-8.
Shekhar, S., Joe, J., Rahul Kumar, Jyothis, J., Ketan Kumar, Priya, R.M., Jayaraj Rao K. and Pagote C.N. (2012). Effect of heat treatment of milk on the sensory and rheological quality of dahi prepared from cow milk. Research and Reviews: Journal of Food and Dairy Technology, 1(1): 9-15.
Tamime, A.Y. and Robinson, R.K. (1999). Yogurt Science And Technology.2nd ed. Cambridge: Woodhead Publish Ltd.
Udayvir, Yadav, G. and Khan, B. L. (2003). Microbiological quality of dahi sold in Kanpur city. Farm Science Journal, 12(1): 52-54.
Vargas, M., Chafer, M., Albors, A., Chiralt, A. and Gonzalez-Martinez, C. (2008). Physicochemical and sensory characteristics of yoghurt produced from mixtures of cows’ and goats’ milk. International Dairy Journal, 18: 1146–1152.

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Evaluation of different quality parameters of goat milk yoghurt developed using selected lactic acid bacteria

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