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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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Subject: Processing and Food Engineering × Author: Sapna × End date: 2023 × Start date: 2023 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Development of cold plasma system for shelf life enhancement of strawberry (Fragaria× anannasa)
    (CCSHAU, Hisar, 2023-03) Sapna; Attkan, Arun Kumar
    The study was conducted to develop lab scale cold plasma system for the surface treatment of strawberries. To evaluate the developed cold plasma system, experiments were conducted on strawberries by varying applied voltage (10, 20, and 30kV), electrode gap (60, 65, and 70mm), and exposure time (60, 90, and 120 s). The strawberry was exposed to the cold plasma in-package as well as without the package. The effects of cold plasma process parameters on the microbial, physical, and antioxidant properties of the treated strawberry were analyzed using the response surface method (RSM). The treated as well as untreated control samples were stored at 4⁰C and the effect of the storage period on the different microbial, physical, and antioxidant properties was examined. There was a significant effect of cold plasma process parameters on the microbial count of the strawberry. Total bacterial count and mold and yeast count, for treated strawberries, had decreased with an increase in applied voltage from 10 to 30 kV. The total bacterial count and mold and yeast count decreased with the decrease in electrode gap and increase in exposure time. There was no significant effect of cold plasma process parameters on the color change values (ΔE), firmness, TPC, and TFC of the strawberries. There was a significant effect of storage time on all the parameters of the strawberry. The cost economics of the developed lab scale cold plasma system was evaluated based on economic indicators viz. breakeven point (92.33kg), payback period (0.68yr/ 8months), and benefit-cost ratio (1.48) of treated strawberry at selling price of Rs.250/kg. Overall, the developed lab-scale cold plasma system was found quite efficient for surface treatment and shelf life enhancement of strawberries.