http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/2919 Mon, 20 Apr 2026 03:25:54 GMT 2026-04-20T03:25:54Z http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/3000 CHEMICAL INVESTIGATION OF BROWN SEAWEED - Padina pavonica Wijerathne, K.A.C.S. In recent years research on the chemistry o f seaweeds (or more generally marine algae)has experienced a tremendous increase due to the need for compounds possessing bioactivities o f possible pharmaceutical applications or other potential economic properties. Marine algae (Seaweeds) are known to produce an incredible diversity of secondary metabolites some o f which show potent anticancer, antibiotics, antiviral antimicrobial, anti-inflammatory, anthelmintic, antinmgal, antitumor and insecticidal activities. Considerable amount o f work have been done on seaweeds around the world. However, the biomedical potential o f the rich Sri Lankan seaweeds remains largely unexplored. Due to this reason Natural product program o f the Institute o f Fundamental studies initiated a project on chemistry and biological activity studies o f Sri Lankan seaweeds. Padina pavonica, brown algae was collected from the coastline o f Arugambay at Ampara District in the Eastem Province in Sri Lanka. Plant material was cleaned, washed with fresh water, air dried, powdered and extracted with MeOH using a sonicator. Dried MeOH extract was successively fractionated with Hexane, Chloroform and Ethyl acetate. After that the dried Hexane fraction was subjected to column chromatography with normal Silica and C-18, followed by Preparative Thin Layer Chromatography (PTLC) to gave three pure compovmds but the amount o f these compounds were small and needed high sensitive instruments to analyze them. As I was not in a position obtain the H NMR o f isolated compounds, for familiarization o f spectroscopic techniques, spectral data o f a compound isolated fiom green seaweed, Ulva lactuca was analyzed ('H and 13C NMR, HMQC and HMBC Spectrums) and its’ structure was proposed as 9-octadecenoic acid (Oleic Acid). Wed, 01 Aug 2007 00:00:00 GMT http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/3000 2007-08-01T00:00:00Z http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/2999 DESIGN A FACTOR FOR RAPIDIN-HOUSE METHOD OF DETERMINING THE TOTAL FATTY MATTER (TFM) OF SOAPPRODUCTS Wanniarachchi, L.S. Soap, soap powder and detergente produces by unilever Sri Lanka possess greater market share in Sri Lanka soap market. Through out the soap and soap powder making process the total fatty matter (TFM) contení is required to monitor closely to maintain the specified TFM in the final product. To achieve the correct TFM in the final product it is necessary to keep TFM in all intermediate steps within specified ranges. The analysis o f TFM is therefore very important to produce high quality producis. There are several methods for determining TFM in soap and soap powders for rapid determinations various in-house methods are used. First TFM percentage and glycerol percentage were determined for soap product samples which soap from Rotating Disk Contactor, Centrifiiged, SWING (Soap With Included Glycerin) soap and blow powder. TFM value of each samples were found from ether, wax cake and light methods and glycerol percentage was measured from relavent experiment. Because glycerol is stoicheometrically related to TFM, glycerol content is a prominent factor that can be used to find a relationship. These resulte were entered to the M1NITAB statistical software and got a relationship between TFM% and Glycerol%. According to the statistical results for soap samples there were strong positive linear relationship between TFM% and glycerol% in SWING soap, Blow powder, and RDC samples. But results o f CF samples obtained from wax cake method are not obeying this phenomenon due to their correlation is 0.310. Thus statistical data for ether method, it is most reliable method for determining TFM. To find the TFM value rapidly for SWING soap samples can be used regression equation, Total Fatty Matter (TFM) % = 47.1 + 1.94 Glycerol %. There was a strong positive linear relationship between TFM and glycerol percentage for blow powder samples, due to their correlations are 0.804 and 0.787 for ether and wax cake method respectively. Wax cake method gives TFM% tapidly than other methods. So it can be used to find the TFM% for soap producis. But bees wax is most suitable as a wax than paraffin wax. Wax cake method able to be applied to find the TFM% for soap producis. Wed, 01 Aug 2007 00:00:00 GMT http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/2999 2007-08-01T00:00:00Z http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/2998 Technical Review of Dipped Products Limited (DPL) Products - A Comparative Analysis Sudarshana, B.M.S. Sat, 01 Sep 2007 00:00:00 GMT http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/2998 2007-09-01T00:00:00Z http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/2997 WEB-BASED RECRUITMENT MANAGEMENT SYSTEM FOR HAYLEYS GROUP SIRIWARDANE, KAPILAW Infocraft (pvt) LTD is proven leader in software industry. It is one of the companies in the Hayleys Group and they had a semi computerized system for recruitments. When group companies want to recruit employees, they published advertisements in leading news papers. Applicants could apply for the jobs just through the emails or by registered post. Since Hayleys group has over hundreds of companies, they recruit thousands of employees in each year. So it is very difficult to recruiting and forwarding applications through their companies to select most suitable applicants for particular vacancy in particular company. Therefore the aim of this web based information system to facilitate the talented individuais, who are willing to start their careers with the Hayleys Groups Limited. Because of this web based system, applicants can apply for the jobs, through the internet and management facilitated to excavate the perfect selection for the relevant employment fields. Because, through the system the applicants will direct to the relevant companies recruitment systems in Hayleys Group. Requirement gathering was done from the staff members, potential users and going through documents and also studied about uploading capacity of database structure, infrastructure and networking feasibility. Based on these details, System Requirement Specification Document was prepared. UML and other technical diagrams were drawn using MS Office Visio 2003 for the documentation purposes. The architecture of the system is based on popular three-tier architecture with latest technologies such as ASP.NET 2.0 and ADO.NET. Then, the prototype was built using HTML, MS Visual C# 2005, US web sever and. SQL server. Initially prototype model was developed to address the requirements. It was evaluated with system users. With feedback from the review team, prototype was reviewed. After that the mid reviews were conducted periodically and suggestion made by the review team was incorporated according. In the quality assurance part, each component was tested individually and finally the overall system was tested and released the engineering product. The outcome of this software met all requirements of the management in company and they were satisfied with the functionality, usability, security and reliability of the system. Target of the new system is “Recruit most suitable candidate for a particular vacancy”. Sun, 01 Jul 2007 00:00:00 GMT http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/2997 2007-07-01T00:00:00Z