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Evaluation of Sanitization Treatments for Red Amaranthus (Amaranthus tricolor L.)


Affiliations
1 Department of Processing Technology, College of Agriculture, Vellayani, Thiruvanathapuram (Kerala), India
2 Department of Microbiology, College of Agriculture, Vellayani, Thiruvanathapuram (Kerala), India
3 Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvanathapuram (Kerala), India
     

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Amaranthus is known as 'poor man's spinach' which is most commonly used leafy vegetable rich in nutrients. Increased need of sanitization in postharvest handling of leafy vegetables has been reported due to outbreak of disease causing pathogens and also due to huge postharvest loss. In the present study amaranthus (var. Arun) were sanitized with different sanitizing agents viz., ozonised water, sodium hypochlorite, brine and tap water (control). Effectiveness of these sanitizing agents for surface decontamination of harvested amaranthus was evaluated by analyzing microbial, physiological and visual parameters. The results revealed that amaranthus sanitized with 2 ppm ozonised water had highest microbial reduction (85.68%), lowest physiological loss in weight (25.63%), highest relative water content (63.11%) and highest score for visual parameters and overall acceptability which was followed by the treatment with 30 ppm sodium hypochlorite. Sanitization with 2 ppm ozonised water also extended the shelf-life of amaranthus upto 4 h of storage at room temperature.

Keywords

Sanitization, Amaranthus, Ozonised Water, Sodium Hypochlorite, Shelf-Life.
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  • Ahvenainen, R. (1996). New approaches in improving the shelflife of minimally processed fruit and vegetables. Trends Food Sci.& Technol., 7:179–187.
  • Amoah, P., Drechsel, P., Abaidoo, R.C. and Klutse, A. (2007). Effectiveness of common and improved sanitary washing methods in selected cities of West Africa for the reduction of coliform bacteria and helminth eggs on vegetables. Trop. Medicine & Internat. Health, 12 (2):40–50.
  • Anonymous (1999). Home scale processing and preservation of fruits and vegetables. CFTRI, Mysore, pp.1-13.
  • Bachelli, M. L.B., Amaral, R.D.A. and Benedetti, B.C. (2013). Alternative sanitization methods for minimally processed lettuce in comparison to sodium hypochlorite. Braz. J. Microbiol., 44 (3):673–678.
  • Beltran, D., Selma, M. V., Marin, A. and Gil, M.I. (2005). Ozonated water extends the shelf-life of fresh-cut lettuce. J. Agric. & Food Chem., 53 (14):5654–5663.
  • Brackett, R.E. (1999). Incidence contributing factors and control of bacterial pathogens in produce. Postharvest Biol. Technol., 15:305-311.
  • Chandran, T.T. (2013). Protocol development for fresh cut vegetables. M.Sc. (Hort.) Thesis, Kerala Agriculture University. Thrissur, KERALA (INDIA).
  • Chen, X., Binjun, L., Lingchuan, M. and Shuangxi, F. (2013). Research progress in preservation of postharvest leafy vegetables. Adv. Materials Res., 749:401- 407.
  • Heard, G. (2000). Microbial safety of ready-to-eat salads and minimally processed vegetables and fruits. Food Sci. Technol. Today, 14:15-21.
  • Ibrahim, S.A., Mutamba, O.Z., Yang, H., Salameh, M.M., Gyawali, R. and Seo, C.W. (2012). Use of ozone and chlorine dioxide to improve the microbiological quality of turnip greens. Emir. J. Food Agric., 24 (3):185-190.
  • Karaca, H. and Velioglu, Y.S. (2007). Ozone applications in fruit and vegetable processing. Food Rev. Internat., 23:91–106.
  • Kim, J.G. (2012). Environmental friendly sanitation to improve quality and microbial safety of fresh-cut vegetables. In: Biotechnology - Molecular Studies and Novel Applications for Improved Quality of Human Life, Reda Sammour (Ed.), pp.173-196.
  • King, J.A.D., Magnuson, J.A., Torok, T. and Goodman, N. (1991). Microbial flora and storage quality of partially processed lettuce. J. Food Sci., 56:459–461.
  • Komanapalli, I.R. and Lau, B.H.S. (1996). Ozone-induced damage of Escherichia coli K-12. Appl. Microbiol.& Biotechnol., 46:610–614.
  • Nadas, A., Olmo, M. and Garcia, J.M. (2003).Growth ofBotrytis cinerea and strawberry quality in ozone-enriched atmospheres. J. Food Sci., 68 (5):1798–1802.
  • Nath, A., Mukhim, K., Swer, T., Dutta, D., Verma, N., Deka, B. C. and Gangwar, B. (2014). A review on application of ozone in the food processing and packaging. J. Food Product Develop. & Packag., 1(2):07-21.
  • Oliveira, A.B.A., Ritter, A.C., Tondo, E.C. and Cardoso, M.I. (2012). Comparison of different washing and disinfection protocols used by food services in Southern Brazil for Lettuce (Lactuca sativa). Food & Nutr. Sci., 3:28-33.
  • Olmez, H. and Akbas, M.Y. (2009). Optimization of ozone treatment of fresh-cut green leaf lettuce. J. Food Engg., 90:487-494.
  • Reddy, J.B. (2010). Minimal processing of green leafy vegetables. M.Sc. (Home Sci.) Thesis, University of Agricultural Sciences. Dharwad KARNATAKA (INDIA).
  • Smart, R.E. and Bingham, G.E. (1974). Rapid estimates of relative water content. Plant Physiol., 53: 258-260.
  • Sothornvit, R. and Kiatchanapaibul, P. (2009). Quality and shelf-life of washed freshcut asparagus in modified atmosphere packaging. Food Sci. Technol., 42:1484–1490.
  • Swaminathan, M. (1995). Food Science and Experimental Foods. Ganesh and Company, Madras, India. 293 p.
  • Varghese, S. (2006). Standardization of minimal processing techniques for selected vegetables. M.Sc. (Hort.) Thesis, Kerala Agriculture University. Thrissur (KERALA) INDIA.
  • Zhang, L., Lu, Z., Yu, Z. and Gao, X. (2005). Preservation of fresh-cut celery by treatment of ozonated water. Food Control, 16:279-283.

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  • Evaluation of Sanitization Treatments for Red Amaranthus (Amaranthus tricolor L.)

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Authors

Geogy Mariam George
Department of Processing Technology, College of Agriculture, Vellayani, Thiruvanathapuram (Kerala), India
P. R. Geetha Lekshmi
Department of Processing Technology, College of Agriculture, Vellayani, Thiruvanathapuram (Kerala), India
C. Mini
Department of Processing Technology, College of Agriculture, Vellayani, Thiruvanathapuram (Kerala), India
K. N. Anith
Department of Microbiology, College of Agriculture, Vellayani, Thiruvanathapuram (Kerala), India
R. V. Manju
Department of Plant Physiology, College of Agriculture, Vellayani, Thiruvanathapuram (Kerala), India

Abstract


Amaranthus is known as 'poor man's spinach' which is most commonly used leafy vegetable rich in nutrients. Increased need of sanitization in postharvest handling of leafy vegetables has been reported due to outbreak of disease causing pathogens and also due to huge postharvest loss. In the present study amaranthus (var. Arun) were sanitized with different sanitizing agents viz., ozonised water, sodium hypochlorite, brine and tap water (control). Effectiveness of these sanitizing agents for surface decontamination of harvested amaranthus was evaluated by analyzing microbial, physiological and visual parameters. The results revealed that amaranthus sanitized with 2 ppm ozonised water had highest microbial reduction (85.68%), lowest physiological loss in weight (25.63%), highest relative water content (63.11%) and highest score for visual parameters and overall acceptability which was followed by the treatment with 30 ppm sodium hypochlorite. Sanitization with 2 ppm ozonised water also extended the shelf-life of amaranthus upto 4 h of storage at room temperature.

Keywords


Sanitization, Amaranthus, Ozonised Water, Sodium Hypochlorite, Shelf-Life.

References