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Kuliyapitiya, Sri Lanka

Wayamba University of Sri Lanka is the thirteenth national university in Sri Lanka. It was established in January 1999. The main purpose of the university is offering English-medium degree, diploma and certificate courses in areas such as Agriculture, Applied Science, Management for students and working professionals. The courses are highly up-to-date and job-oriented.The Wayamba University of Sri Lanka is headquartered at Kuliyapitiya, Sri Lanka. Its four faculties are in Makandura and Kuliyapitiya. The Faculty of Applied science and Faculty of Business Studies and Finance are established at Kuliyapitiya; the Faculty of Agriculture and Plantation Management and Faculty of Livestock, Fisheries, and Nutrition are in Makandura. Wikipedia.

The present study investigated the variations in major antioxidants (total phenolics and vitamin C) and total antioxidant capacity (TAC) of cashew apple between cultivars and during its maturity stages. Ferric Reducing Antioxidant Power (FRAP) assay was used to determine TAC. Total phenolic and vitamin C contents were identified by Folin-Ciocalteu method and titration with 2,6-dichlorophenolindophenol (DCP) dye respectively. Five maturity stages of cashew apple of cultivar 'SLCC M1' were tested for total phenolic and, vitamin C contents and TAC. Our result revealed that ripening increased the vitamin C content whereas the amounts of total phenolics and TAC in cashew apple decreased with ripening. Cashew apples of twelve cultivars were selected to study variation in total phenolic and, vitamin C contents and TAC among selected cultivars. Cashew apple of cultivar 'SLCC N14' had significantly the highest total phenolics content (534.4±17.2 mg GAE/100 g FW) and TAC (680.5±36.7 mg VCE/100 g FW) whereas, significantly the highest vitamin C content (287.8±16.1 mg/100 g FW) was observed in cultivar 'SLCC M2'. Significantly lowest total phenolic content (241.1±18.1 mg GAE/100 g FW), TAC (268.7±11.9 mg VCE/100 g FW) and vitamin C content (157.4±9.1 mg/100 g FW) were recorded in cashew apple of cultivar 'WUCC 21' when compared to other selected cultivars. The results indicate that, among all selected cultivars, cashew apple of cultivar 'SLCC N14' contains significantly higher total phenolics and TAC whereas, cashew apple of cultivar 'SLCC M2' reports significantly higher vitamin C content. Mature cashew apples contain higher amounts of vitamin C than immature stages of cashew apples and could therefore be used as a significant dietary source of antioxidants.

Tennakone K.,Wayamba University of Sri Lanka
International Journal of Theoretical Physics | Year: 2012

Ball lightning or faintly luminous floating spheres with radii of the order of ten centimeters appearing transiently in air notably during stormy weather continue to remain an unresolved phenomenon. It is suggested that these objects are organized structures constituted of an electrically charged spherical thin shell of electro-frozen dipole oriented water molecules carrying an electric charge, balanced by the internal negative pressure and outward electrostatic stress. A model presented, resembling the classical theory of the electron with Poincare stresses explain almost all observed attributes of this phenomenon. The possibility of realizing macroscopic spherical surface charge distributions in the vacuum and their implication on the problem of electron are commented. © 2011 Springer Science+Business Media, LLC.

Shahidi F.,Memorial University of Newfoundland | Chandrasekara A.,Wayamba University of Sri Lanka
Journal of Functional Foods | Year: 2013

Millets rank six in the world cereal grain production. In Africa and Asia, these underutilized grains play a major role in the food security of millions of people. In addition to being a rich source of nutrients, millet grains have an abundance of phytochemicals, particularly phenolic compounds. This review will focus on the bioactivities and health benefits of millet phenolics as revealed by in vitro and in vivo studies. Phenolic compounds in millets are found in the soluble as well as insoluble-bound forms. Both hydroxybenzoic and hydroxycinnamic acids and their derivatives are notably present in different types of millet grains in varying proportion. Meanwhile, flavonoids exist mainly in the free form. A wide variation exists in the phenolic content and antioxidant capacity of millet grains. Further, millet grain phenolics, are bioaccessible, possess bioactivities against several pathophysiological conditions and may serve as potential natural sources of antioxidants in food and biological systems. While this review also shows the existence of a substantial body of evidence for in vitro antioxidant activity of millet grain phenolics, there is a clear gap for in vivo information. However, the use of millets, as nutraceuticals and specialty foods in disease risk reduction and overall health and wellness is warranted. © 2013 Elsevier Ltd.

A theoretical model is presented to show that spherically symmetric and dynamically stable charge separated structures of net zero charge that store energy could be formed by balancing of electrostatic forces and air pressure. The model evaluates the stored energy, the magnitude of separated charge and the pulsation frequency in terms of one parameter, which is a characteristic linear dimension of the system. Implications of the model on ball lightning and earthquake lights are discussed. © 2011 Elsevier B.V.

Ganganath N.,Wayamba University of Sri Lanka | Cheng C.-T.,Hong Kong Polytechnic University
Proceedings - 2013 International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC 2013 | Year: 2013

Wireless sensor networks are usually deployed in scenarios that are too hostile for human personnel to perform maintenance tasks. Wireless sensor nodes usually exchange information in a multi-hop manner. Connectivity is crucial to the performance of a wireless sensor network. In case a network is partitioned due to node failures, it is possible to re-connect the fragments by setting up bridges using mobile platforms. Given the landscape of a terrain, the mobile platforms should be able reach the target position using a desirable path. In this paper, an off-line robot path planner is proposed to find desirable paths between arbitrary points in a given terrain. The proposed path planner is based on ACO algorithms. Unlike ordinary ACO algorithms, the proposed path planner provides its artificial ants with extra flexibility in making routing decisions. Simulation results show that such enhancement can greatly improve the qualities of the paths obtained. Performances of the proposed path planner can be further optimized by fine-tuning its parameters. © 2013 IEEE.

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