Browsing by Author "PEDURUHEWA, P.S."

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    EFFECT OF COOKING ON ASCORBIC ACID CONTENT, TOTAL POLYPHENOL CONTENT AND ANTIOXIDANT ACTIVITY OF SELECTED VEGETABLES
    (Uva Wellassa University of Sri Lanka, 2016) PEDURUHEWA, P.S.
    The present study was carried out to determine the effect of cooking on Ascorbic Acid Content, Total Polyphenol Content and Antioxidant Activity of selected vegetables. Vegetables: Beetroot, Cabbage, Eggplant, Green bean, Onion and Spinach obtained from local market of Sri Lanka were subjected to cook for 3 minutes and 7 minutes at 78+2 °C. Effect of cooking was resulted significant difference with respect to the existing values of tested parameters in the raw vegetable extracts. Ascorbic Acid Content was determined using 2, 6- Dichlorophenol-Indophenol Visual Titration method and Total Polyphenol Content of vegetable extracts were determined using Folin-Ciocalteu method. Antioxidant Activity of vegetable extracts were measured using DPPH radical scavenging assay and expressed as IC50 values. The Ascorbic Acid Content varied widely among the raw vegetables from 42.40 mg m1-I to 7.07 mg ml-J and with the effect of cooking tested values were drastically reduced in all the vegetables. Total Polyphenol Content in raw vegetables showed both positive and negative correlation with cooking. Beetroot, Cabbage and Eggplant are increased Total Polyphenol Content with the cooking by 12.28%, 16.54%, 19.48% respectively. Antioxidant Activity of Eggplant was increased after cooking by 22.08% and all other vegetables were reduced their Antioxidant Activity under the same conditions. Results of Antioxidant Activity under raw treatment revealed that the selected vegetables can be considered as vegetables with extremely high antioxidant potential. Positive correlation with cooking was found between Antioxidant Activity and Total Polyphenol Content in Beetroot, Cabbage and Eggplant. Resulted data under cooking effect on the Antioxidant Activity is important to improve existing natural Antioxidant Activity of selected vegetables. Alterations in cooking of vegetables can utilize the natural Antioxidant Activity while improving the human health against non-communicable dieases. Key words: Ascorbic Acid Content, Total Polyphenol Content, Antioxidant Activity, Cooking, Vegetables
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    IMPLEMENTATION OF BETTER MANAGEMENT PRACTICES ON Penaeus monodon FARMING IN PUTTLAM ZONE, SRI LANKA
    (Uva Wellassa University of Sri Lanka, 2016) PEDURUHEWA, P.S.
    Penaeus monodon farming is the main brackish water, commercial scale aquaculture practice in Sri Lanka, which, targets the export market. However, it has been suffering from disease outbreaks due to the unplanned aquaculture development in the North Western area of the country. To overcome these issues National Aquaculture Development Authority (NAQDA) has introduced better management practices to farmers for the convenience of management and monitoring. Shrimp farming area of North Western Province has been classified into five major zones as Chilaw, Arachchikattuwa, Mundalama, Kalpititya and Puttlam. These major zones were divided into 33 sub zones. This study was carried out to investigate the level of implementation of better management practices in the six sub zones and to assess the relationship between better management practices and yield per hectare in Puttlam Zone. Among 120 farms of the Puttlam Zone, 30 individual farms representing six sub zones were selected randomly. Level of implementation of better management practices, yield pc ,. hectare, and disease occurrence data were collected through a self-administered questionnaire and farm observation. According to the Principal Component Analysis, farms in Puttlam zone can be categorized into four major groups based on the level of implementation of better management practices as 26.66% optimum level implementation, 40% average level implementation, 10% Minimum level implementation and 23.33% dissatisfied level implementation. Further, levels of implementation of better management practices referring to the sub zones are 57.14%, 42.8%, 25%, and 25%, respectively for the sub zones of Sewwanthiwu, Aneikutti, Manalthiwu and Wadathamunei. Descriptive analysis reveals that the levels of implementation of better management practices in Mee oya and Poorwasikuda sub zone are 7.66% and 3.5% respectively. The significant positive relationship was observed between level of implementation of better management practices and yield per hectare (r =0.810, P-value 0.000). Further, significant negative relationship was observed between level of implementation of better management practices and disease occurrence (r = -0.837, P-value = 0.035). Key words: Better Management Practices, Penaeus monodon, Sub zone