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1999 - 199912000 - 20071
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Author: Gupta, Meenakshi × Start date: 1981 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Assessment of Nutritional Quality of Packed Food of School Children
    (I.C College Of Home Science Chaudhary Charan Singh Haryana Agricultural University Hisar, 1999) Gupta, Meenakshi; Kaur, Yashpal
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    ThesisItemOpen Access
    Modified atmosphere packaging of guava fruits in polymeric films
    (CCSHAU, 2007) Gupta, Meenakshi; Garg, M. K.
    The study on modified atmosphere packaging of guava fruits was undertaken to evaluate the effect of different types of polymeric film, thickness, perforation level on the shelf life of guava fruits under different storage environments. Guava fruits were packed in Low Density Polyethylene (LDPE) and Polypropylene (PP) of 100 gauge (25 micron) and 150 gauge (37.5 micron) thickness each. LDPE and PP film of 100 and 150 gauge with 0.5% level of perforation were also used. The quality of guava fruits was observed in terms of Physiological Loss in Weight, firmness, Total Soluble Solids, oxygen and carbon dioxide concentration, acidity and ascorbic acid. In all the treatments given, Physiological Loss in Weight increased with storage duration where as fruit firmness and ascorbic acid decreased with increasing storage period. O2 and CO2 , decreased and increased respectively with storage time. Based upon above parameters, among perforated and non perforated LDPE 100 and 150 and PP 100 and 150 films, non perforated LDPE 150 was found to be the best packaging film for extending shelf life of guava fruits upto 18 days at room temperature storage conditions and upto 24 days at low temperature storage conditions with the minimum losses. A perforation level of 0.5 percent was found to provide no significant benefit when compared with the fruits packed in non-perforated film. The thickness of the film had positive correlation with quality parameters. Film packaging was found to result in reduction of losses over control fruits. During the period of study non-perforated packages were found to give lesser deterioration of quality as compared to the perforated ones and control fruits. And among non-perforated packages, LDPE 150 was found to be most effective in reducing the changes in quality parameters.