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EFFECT OF PRE-COOLING METHOD ON THE SHELF LIFE AND QUALITY OF BROCCOLI (Brassica oleracea L.)

KrishiKosh

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Title EFFECT OF PRE-COOLING METHOD ON THE SHELF LIFE AND QUALITY OF BROCCOLI (Brassica oleracea L.)
 
Creator Vandana Kochhar
 
Subject diseases, enzymes, sexual reproduction, organic compounds, biological phenomena, fruits, breeds (animals), byproducts, sampling, potassium
 
Description An investigation was under taken to study the effect of pre-cooling method on the shelf life and quality of broccoli cv Punjab broccoli 1. Broccoli was sown in PAU farm, harvested, cleaned, sorted to have produce of uniform size and colour and divided into two lots viz. with and without stalk. It was pre-cooled using different methods viz. room cooling, forced air cooling, hydro cooling and package icing. The pre-cooled broccoli samples were cold stored at 0 – 1 ⁰C and 90 – 95 % relative humidity and were analysed for quality during storage. The parameters evaluated were physiological loss in weight (PLW %), colour change (ΔE), texture (firmness), shriveling and decay. The PLW, colour change, shrivelling increased with the period of storage whereas firmness decreased. No decay was found during entire period of storage. Refrigeration load of different pre-cooling methods and storage was also calculated. Peak refrigeration load for broccoli pre-cooled in 24 hours was 0.51, 0.63, 0.32 and 0.65 tons in room cooling, forced air cooling, hydrocooling and package icing respectively and the corresponding peak refrigeration load for broccoli pre-cooled in 4 hours were 3.06, 3.70, 1.90 and 3.90 tons of refrigeration. Refrigeration load during storage operation was 0.18 tons. The data was statistically analysed to verify the results. Based on these observations, it was concluded that package icing and hydrocooling were better methods of pre-cooling compared to forced air cooling and room cooling. The shelf-life and quality of broccoli could be maintained upto 18 days in broccoli with stalk and 15 days in broccoli without stalk respectively under cold storage conditions
 
Date 2017-01-03T11:57:40Z
2017-01-03T11:57:40Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/94117
 
Language en
 
Format application/pdf