http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/5651 Sat, 04 Apr 2026 16:26:59 GMT 2026-04-04T16:26:59Z http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/3489 Title: Alteration of Pitaya Pulp into a Value Added Product to Reduce the Post Harvest Losses Authors: Mufas, A.H.M.; Perera, O.D.A.N. Abstract: Pitaya (Hylocereus undatus) is well known in the Asian region. It is delicious and having higher nutritional value. Study was conducted to develop ice-cream incorporated with pitaya pulp and further studies were undergone to determine the most acceptable formula for value added ice cream and evaluate the shelf life. The samples were prepared into three different portion of pitaya pulp. Mashed pitaya pulp, the proportion of 12%, 15%, 18% (w/w) was added to the pasteurized ice-cream mix separately. Finally ice-cream was stored under freezing condition. This ice-cream was evaluated with 20 semi trained panelists with seven points’ hedonic scales to find out the standard formula. Sensory, chemical and microbial analyses were conducted for 12 weeks to evaluate the shelf life. Chemical, physical components of the ice-cream were determined according to the methods recommended by AOAC (1995). Formula with 12% pulp was selected according to the panelist preference. Fat content of ice cream was 45.37±0.99% (dry basis), protein was 7.73±0.34%.There was a slight increase in titratable acidity in the ice cream with time whilst pH, TSS decreased. There were no significant changes of pH during the storage. Microbial number also was reduced with time. The results revealed the possibility of manufacturing of value added ice cream with pitaya pulp showing satisfactory consumer acceptability Sun, 01 Jan 2012 00:00:00 GMT http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/3489 2012-01-01T00:00:00Z http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/3471 Title: Ownership structure and capital structure interaction: evidence from sri lankan panel data Authors: Gunathilaka, C. Abstract: The study examines the interaction of capital structure and ownership structure using a sample of sixty five (65) firms listed in the Colombo Stock Exchange. Equity block holders are identified and grouped as ‘Parent company’, ‘other Institutional shareholders’ and ‘Managers’. Generalized Method of Moments (GMM) estimator is employed for an unbalanced panel data for years, from 2006 to 2010. The dynamic tests reveal that there is a significant negative influence of profitability, asset structure, and operating risk on the debt ratio of firms. Growth is insignificant and affects negatively to leverage. The size has a significant positive impact on financial leverage. The institutional ownership and managerial ownership is negatively related to the leverage while ownership concentration with a parent company positively affects the leverage. This suggests that concentrated ownership and high debt level together causes high risk for firms. Hence, the firms would prefer a lower debt ratio as means of risk reduction. In contrast, the parent company ownership does not raise risk and therefore firms prefer higher debt level. Further the institutional investors seek low geared firms in reducing the risk of investment. The findings also indicate that the large firms have easy access to the credit market and become more levered. The firms use retained earnings largely, hence the increased revenue results in low debt ratio. The results also indicate an application of pecking order theory for finance and that the institutional investors are seeking for low geared firms. Hence the firms are subject to the control by market forces. Sun, 01 Jan 2012 00:00:00 GMT http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/3471 2012-01-01T00:00:00Z http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/2172 Title: Water surface area and temperature change detection analysis in lagoons (a case study in puttalam lagoon, puttalam) Authors: Hicmathullah, M.L.M.; Nafla, A.W.F.; Nanthakumaran, A. Abstract: Puttalam lagoon significantly contributes for the livelihood through fishing for the economically deprived community in Puttalam District, Sri Lanka. Observable anthropogenic activities and rapid urban development cause deterioration of water quality and reduction of surface area of water body. The objective is to study the spatiotemporal changes on the surface area and on surface temperature of lagoon. This study was done using geographic information system and remote sensing approach for the six Landsat (3 TM, 1 ETM and 2 OLI) imageries and Water Ratio Index was applied to extract and quantify the changes in the surface area and spectral radiance approaches to determine the land surface temperature of the lagoon for the period of 1988, 1995, 2001, 2008, 2015 and 2019. The multi temporal map of surface area and surface temperature maps were produced for the change directions. The results revealed a significant decrease in surface area of the lagoon which was nearly 8.7% of its surface area and an increase of temperature by nearly 5.2oC during the period of study. Strong negative correlation (Pearson's correlation coefficient = 0.91) observed at 95% of significance level (p value = 0.01) between the surface area and temperature of lagoon. It is essential to take conservation measures to sustain this lagoon at Puttalam. Wed, 01 Jan 2020 00:00:00 GMT http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/2172 2020-01-01T00:00:00Z http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/2171 Title: Socio-economic influence on mental health in post-war jaffna society a multivariate statistical review Authors: Elankumaran, C. Abstract: This study focuses on the socio-economic influences on the nature of mental health in post war Jaffna society, prior to Covid-19 pandemic. This is a follow Soc re subjected to investigation. The general measures of Mental Health include "Confidence on Quality of Life" and "Pain or Discomfort in Daily Life". Specific measures formulated were in dimensions, "Psychological Symptoms". "Physiological Symptoms", "Psycho-Physiological Symptoms" and "Ambiguous Symptoms". Socio-Economic factors used were "Occupation", "Income", "Expenditure", and "Food Consumption". Exploratory dataanalysis, Cluster analysis, Canonical Discriminant analysis and Logistic regression analysis were adopted to extract the results in this study. We found that there are adverse effects among the majority (78%) of the couples in post-war scenario. In-depth analysis in terms of Psychological issues, shows that more than half of the couples feel low spirit, about half suffered by poor memory, less than one-fourth feels loneliness, about half of the husbands and more than one-fourth of the wives feels restless, about one-third of the couples feel failure of their expectations, about one-fifth of the couples feel wondering for un-worthwhile life, about two-fifth of the couples suffered by un-happiness, and about two-fifth of the couples are suffered by sleepless conditions. Similar outcomes were also found in the other three dimensions. Hence, our study confirms that the Jaffna society has been suffering in mental health in the post-war scenario. Investigation for the influence of socio-economic factors on the dimension 'Psychological Symptoms' reveals that the occupational level and family income have direct impacts on the psychological wellness of the people. The inherent causes of this effects were found to be the loss of employment or under employment due to the consequences of war and displacements. More than half of the couples have experienced psychological disorders due to economic reasons. We also found little more than one-fourth of the wives have been suffering by physiological, psycho-physiological and ambiguous symptoms due to socio-economic reasons. This nature of effects in such three types of mental health disorders due to economic reasons is found in more than three-tenth among the husbands. It is confirmed among the husbands due to the fact that their changing occupational levels, changing work environment which was hostile to normal life patterns and changing food consumption patterns stimulated such effects. Wed, 01 Jan 2020 00:00:00 GMT http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/2171 2020-01-01T00:00:00Z