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Item Variation of antioxidant activity and the extraction kinetics of polyphenols of fannins grade green tea (Camelia sinensis) with geographical elevation(Institute of Chemistry Ceylon, 2018-05) Perera,K M K G; Soysa,PCamellia sinensis is one of the most commonly consumed drinks in the world. It has many beneficial health effects associated with our day to day life. Tea polyphenols are responsible for antioxidant activity and health benefits. T he phytochemicals composition of tea may vary with the geographical area.Item Phenolic compounds and antioxidant activity of Ampelocissus indica (L.) planch; a wild grape species native to Asia(Institute of Chemistry Ceylon, 2018-05) Fernando,W L; T Hewa Pathirana,H P D; Yalegama,L L W C; Jayaweera,C DGrape is a natural source of phenolic compounds, that contributes to the sensory characteristics and many beneficial bioactivities, mainly antioxidant activity of wines and other processed food products.Item Adsorptive removal of cadmium in aqueous solutions using coconut dregs residue as the adsorbent(Institute of Chemistry Ceylon, 2018-05) Perera,C Madawala, ARapid industrialization has contributed to the release of toxic heavy metals into natural water bodies giving rise to water pollution which has become a serious concern all over the world due to the non-biodegradable nature of heavy metals. Removal of heavy metals by utilizing the technique of adsorption using biological waste is an effective alternative.Item Antioxidant activity and extraction kinetics of polyphenols in BOPF grade black tea (Camellia sinensis) from different geographical elevations in Sri Lanka(Institute of Chemistry Ceylon, 2018-05) Soysa,P; Wijesinghe, K MTea processed from young leaves and buds of Camellia sinensis is one of the most widely consumed beverages in the world due to its beneficial health effects. Tea grown in Sri Lanka are categorized as high grown (HGT), mid grown (MGT) and low grown tea (LGT) based on the geographical elevation of tea cultivation regionsItem Digestive enzyme inhibitory activities and anti-glycation properties of Myristica fragrans (nutmeg) seed extracts(Institute of Chemistry Ceylon, 2018-05) Herath,H M D C; Fernando,W I T; Perera, H K I; Jayasinghe,LDiabetes mellitus is a metabolic disorder characterized by hyperglycaemia. Management of type 2 diabetes mellitus is by controlling hyperglycaemia and its complications. T he objective of this study was to investigate the α- glucosidase inhibitory activity,Item Glycaemic index of vitagen: a commercial proforma formulated meal replacement(Institute of Chemistry Ceylon, 2018-05) Weerarathne,M P P P; Ekanayake,SBased on the glycaemic index (GI) food can be categorized according to their blood glucose response. At present, GI values are assigned to more than 750 food items available in the international market. However, though there are GI data of some basic Sri Lankan foods and traditional foods,Item Wood based cologne from neem(Institute of Chemistry Ceylon, 2018-05) Ukwattage,P; Udawatte,C SPerfume is a mixture of fragrant essential oil or aromatic compounds with fixative and solvent. They are used to give the human body, animals, food, objects and living species a pleasant odour. Wood extracts are very important in perfumery because they provide mostly fragrance which gives a smell for a long period of time. In this study,Item Determination of anti-diabetic activity of selected medicinal plants in Sri Lanka(Institute of Chemistry Ceylon, 2018-05) Wickramarachchi,; Visvanathan,R; Nizar,A; Liyanage,RDiabetes mellitus is one of the main chronic diseases currently affecting mankind. In type two diabetes mellitus, the post-prandial blood glucose level increases uncontrollably causing metabolic imbalances in the body. α-Amylase and α-glucosidase are the two important enzymes, responsible for digestion of starch inside the body. Therefore, inhibition of these two enzymes can stop the increase of blood glucose level after a carbohydrate diet.Item Identification of chemical constituents of Panicum maximum plant that shows attraction to paddy bug(Institute of Chemistry Ceylon, 2018-05) Munindradasa1, W C S; Paranagama,P.APaddy bug (Leptocorisa oratorius) is the major pest damaging the rice plant in Sri Lanka. These bugs attack the plant by sucking the sap of grains. This causes partially filled grains making severe lose in products.Item Determination of the content of cadmium, lead, zinc and arsenic in chicken and beef liver available in the local market(Institute of Chemistry Ceylon, 2018-05) M T Fernando,; Somapala,E GIntake of heavy metal contaminated meat items has been a major risk to human health. The concentrations of cadmium (Cd), Lead (Pb), Arsenic (As) and Zinc (Zn) in two different liver types chicken and beef collected from local market were analyzed using Flame Atomic Absorption Spectroscopy (Hitachi ZA 3000 Polarized Zeeman).Item Synthesis, characterization of copper based metal organic frameworks and their application in heterogeneous catalysis(Institute of Chemistry Ceylon, 2018-05) Kulasekara,D; Rajendran,S; Jayasundara,C; Infas,H. M .MMetal organic frameworks (MOFs) are crystalline porous materials that consist of metal ions/clusters (which act as connectors), coordinated to organic ligands (linkers) to form 2-D or 3-D framework like structures. Basically the choice of metal and the linker dictates the structure of the MOF and hence the properties.Item Synthesis, characterization and biological studies of a novel naphthalenederivatized tridentate ligand and its fac-[Re(CO)3 L] complex as potential therapeutic agents for lung cancer(Institute of Chemistry Ceylon, 2018-05) Darshani,T; Priyadarshani,V V; Samarakoon,S; Perera,I C; Perera,TRe(I) compounds, among other organometallic compounds, have recently gained attention as potential anticancer agents. In this study, a novel tridentate ligand (N(SO2 )(1-nap)dien) derived from diethylenetriamine (dien) attached to a sulfonamide group, was synthesized in good yield (63% yield) and its net neutral Re(I) complex ([Re(CO)3 (N(SO2 )(1-nap)dien)]) synthesized by treating fac-[Re(CO)3 (H2 O)3 ]+ with the synthesized ligand. The compounds were characterized by X-ray diffraction studies, 1H NMR, FT-IR, UV-Vis and f luorescence spectroscopies.Item Physiochemical properties of rice based herbal biscuit incorporated with the decoction of Syzygium cumini bark(Institute of Chemistry Ceylon, 2018-05) Wijeratne,A C; Ranaweera,K K D S; Ekanayake,S; Perera, P R D; Senanayaka,SDiabetes mellitus is a widespread debilitating disease in the modern-day world which leads to many health complications affecting the quality of life. Intake of less refined food, herbal decoctions etc. play a vital role in managing diabetesItem Development of natural rubber based materials having enhanced mechanical properties(Institute of Chemistry Ceylon, 2018-05) H C Wijesinghe,H C; Mudiyanselage,T KAdvances in polymer science have led to the development of several novel mechanical strengthen high performance polymers from natural rubber (NR). The properties of natural rubber itself restrict it to be used for many applications. Modifications of NR acquire a vast range of desired properties to use in so called areas. Those shortcomings were overcome by chemical and physical alteration of natural rubber. The mechanical strength of a polymer mainly depends on its physical parameters and cross-links density.Item Reef fish waste for production of good auality fish oil(Institute of Chemistry Ceylon, 2018-05) Dulochana,G .L. A; Pathirana,H .M .K. KFish oil is a good source for ω-3 fatty acids such as docosahexaenoic acid (DHA) and eicosapentaneoic acid (EPA). Fish oil is commercially produced using tissues or waste of cod, salmon etc. Autoxidation of unsaturated fatty acids forms hydroperoxids, aldehydes etc. giving unpleasant order and flavor to fish oil.Item Synthesis of homo and heteroleptic Ag(I) complexes based on N and P donor ligands(Institute of Chemistry Ceylon, 2018-05) Perera,.DSilver has been known to possess antimicrobial properties for more than two thousand years and is considered as an antimicrobial agent. Pharmaceutical application of silver was first recognized with the use of silver nitrate in early 1800s for the treatment of ulcers.Item Development of a pH sensitive indicator from Terminalia catappa leaves(Institute of Chemistry Ceylon, 2018-05) Perera, H; Udawatte,C SA pH indicator is a chemical compound used to visually determine the acidity or basicity of a solution. Extracts of both red and green leaves from Terminalia catappa were investigated to develop a natural pH sensitive indicatorItem Study the quality of metformin hydrochloride sustained release tablets available in Sri Lanka(Institute of Chemistry Ceylon, 2018-05) Ajeethan,V; Fernando,S; Karunaratne,D.NType 2 diabetes mellitus (T2DM) is a non-insulin dependent diabetes mellitus, where high blood glucose level is due to comparatively less amount of insulin secretion or insulin resistance or decreased insulin action on target tissues.Item Molecular identification and screening of anti-obesity activity and antidiabetes property of selected endolichenic fungi in mangrove ecosystem of Puttalam lagoon(Institute of Chemistry Ceylon, 2018-05) Maduranga,H .A. K; Attanayake,R .N; Weerakoon,G; Paranagama,P.ANatural products based drug development has become an attractive area of research since there are limited options available to treat certain non-infectious diseases such as diabetes and obesity. Among these natural products, it has been reported that secondary metabolites of fungi, especially of endolichenic fungi (ELF) have the ability to produce promising bioactive compounds.Item Heavy metal content and fungal resistance of paints available in the local market(Institute of Chemistry Ceylon, 2018-05) Wickramaratne,K. M. K; Perera,G. W. C .S; Udawatte,C .SHeavy metals and their compounds can have adverse effects on human health. Humans are exposed to these metals by inhalation, ingestion or dermally. Heavy metals have been used in many different applications, including paint industry, building materials, pigments for glazing ceramics, and pipes for transporting water.