Chemistry
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Item A Comparative Preliminary Study on the Prevalence of Overweight-Obese with Socio-Economic Status (SES) Among the Adult Females(1st International Conference on Unani, Ayurveda, Siddha and Traditional Medicine, On Natural Solutions for Health Challenges, 2013) Manuha, M.I.; Iqbal, N.Z.; Nageeb, B.M.; Paranagama, P.A.This study was to determine how the SES influenced on overweight and obesity in adult women. The analysis was done by ISBM SPSS. BMIwas categorized according to WHO criteria such as normal weight: 18.5-24.9 kg/m2; overweight: 25.0- 29.9 kg/m2; or obese > 30.0 kg/m2. Obese further categorized to obese-I (30-34.9 kg/m2), obese-II (35-39.9 kg/m2) and morbid obese ( > 40 kg/m2). 206 participants were participated. In this study 32.5% were overweight and 67.5% were obese. Out of this 67% of obese 43.2% were belong to obese I, 17.5% were belong to obese II and 6.8% were in the morbidly obese. 43.3%, 40.3% of overweight were found in the age group 31-40 and 41-60 respectively. Similarly 35.7%, 47.4% of obese were found in the similar age groups. 53.7% was overweight and 68.3% was obese found in the participants who completed or below level of primary education. Further in the participants who completed the secondary education or above, the percentage of overweight (31.4%) was found lesser amount than obesity (46.3%). Family income concerned both 33.3% overweight and 37.4% obese were found in less income family (LKR < 25000). 29.8% overweight and 31.7% obese were found in the families who received the income between LKR 25000 - 50000. Inthis study 71.8%, 22.3 %, 5.8% were house wives, employees and students respectively. Overweight/obese found more in the age groups between 31-60. Overweight/obese found higher percentage in poor educated group. This study indicates that with the increasing of the age the overweight condition is transforming into obese condition. Therefore a study on wide range of the population is needed to come to a conclusion.Item A study of the essential oils of pepper ( Piper nigrum) by combined GC/MS analysis(Proceedings of Sri Lanka Association of Advancement of Science, 1990) Paranagama, P.A.; Jayathilake, G.S.; Jayawardene, A.L.; Mubarak, A.M.; Senanayeke, U.M.; Wimalasena, S.Item A study of synergistic effects of some Sri Lankan essential oils against cowpea bruchids(Callosobruchusmaculatus,Proceedings of eleventh Asian symposium on Medicinal plants, Spices and Other Natural Products, Kunming, China, 2003) Paranagama, P.A.; Adhikari, A.A.C.K.; Abeywickrama, K.P.; Bandara, K.A.N.P.Item A study of the essential oils of nutmeg and mace (Myristica fragrance) by combined GC/MS analysis(Proceedings of Sri Lanka Association of Advancement of Science, 1989) Paranagama, P.A.; Jayathilake, G.S.; Jayawardene, A.L.; Mubarak, A.M.; Senanayeke, U.M.; Wimalasena, S.Item A study of the essential oils of turmeric (Curcuma longa) by combined GC/MS analysis(Proceedings of Sri Lanka Association of Advancement of Science, 1990) Paranagama, P.A.; Jayathilake, G.S.; Jayawardene, A.L.; Mubarak, A.M.; Senanayeke, U.M.; Wimalasena, S.Item A study of the essentials oils of clove bud, stem and leaf (Carryophyllus aromaticus) by combined GC/MS analysis(Proceedings of Sri Lanka Association of Advancement of Science, 1990) Paranagama, P.A.; Jayathilake, G.S.; Jayawardene, A.L.; Mubarak, A.M.; Senanayeke, U.M.; Wimalasena, S.Item A study on the correlation between Body Mass Index of overweight/obese, Total PhysicalActivity and Cardiovascular risk factors with special reference to dyslipidaemia in adult women(Sri Lanka Journal of Indegenous Medicine (SLJIM), 2013) Manuha, M.I.; Iqbal, N.Z.; Nageeb, B.M.; Paranagama, P.A.MI1,NZ 2, BM1, P Paranagama3Item Accessing plant-associated microbial diversity for discovery of small molecule bioactive agents(Accessing plant-associated microbial diversity for discovery of small molecule bioactive agents, 40th IPUAC Congress, 2005) Wijeratne, E.M.K.; Turbyville, T.J.; Bashyal, B.P.; Zhan, J.; Jian, H.; Paranagama, P.A.; Seliga, C.J.; Liu, M.X.; Burns, A.M.; Whitesell, L.; Gunatilaka, A.A.L.Gunatilaka, A.A.L.Item Accumulation of heavy metals in a food fish, Mystus gulio inhabiting Bolgoda Lake, Sri Lanka(University of Kelaniya, 2007) Senarathne, P.; Pathiratne, K.A.S.Item Activity of chitosan films containing rhizome oil of Alpinia malaccensis against Escherichia coli and Staphylococcus aureus(Sri Lanka Association for the Advancement of Science, 2014) Samaratunge, I.N.; Wickramarachchi, P.A.S.R.Item Adaptation of hydroponics technology in Matara district –Case study in Beralapanathara(Sri Lanka Association for the Advancement of Science, 2008) Weerasinghe, K.D.N.; Abeysekara, I.K.; Chandima, H.H.; Wickramasinghe, I.; Liyanage, J.A.Department of Agric Engineering, Faculty of Agriculture, University of Ruhuna commenced an industrialization program of the Hydroponics technology developed by the Department for farmer groups in Beralapanathara along with SEEDS (Sarvodaya Economic Enterprise Development Services) and ITDG (Intermediate Technology Development Group of Sri Lanka) in 2001. Initially 10 farmers were grouped in to a company and technology was transformed to the members in the company by employing a Graduate for a period of one year, and providing necessary inputs, technology, and know how by the project. Present study was conducted from April to May in 2008 to assess the success of the program after seven years of its existence. The main objective of the study was to assess the economy of the Bell pepper and hydroponically grown Cucumber in Beralapanathara green houses. Survey results revealed that, at present total number of green houses in Beralapanathara were increased up to 16 by grouping 15 farmers. About 76.92 % of farmers have tunnel floor area over 1000 sq.ft; 23.08 % of farmers have floor area less than 1000 sq.ft. Majority of the green houses are dent shape and used the technology innovations for the construction. Bell pepper and Cucumber are the dominating vegetable crops that grown hydroponically in Beralapanathara green houses. 38.46 % of farmers grow only Bell pepper due to its high demand and high market price. Olympus, King Arther, Adino, Golden Bell and Twingo are the commonly grown Bell pepper varieties. Among them, King Arther is better adapted for the area and gives a higher yield compare to other varieties. Cucumber, variety Efdal and variety Sakura have better adoption to this area. Results revealed that, hydroponically grown Cucumber and Bell pepper in a 1000 sq.ft tunnel provides more profit compare to tea. Limiting factor for further expansion of Cucumber appears to be the transport problem, even though profit gain from Cucumber is twice that of the Bell pepper.Item Adsorptive transport of chromate by suspended solids in Kelani river(Sri Lanka Association for the Advancement of Science, 2006) Duminda, S.L.A.; Liyanage, J.A.; Weerasooriya, R.Item Aflatoxigenic Aspergillus flavus and aflatoxin formation in selected spices during storage(2009) Rajasinghe, M.; Abeywickrama, K.P.; Jayasekera, R.Proliferation of aflatoxigenic fungi and accumulation of aflatoxins take place during storage of spices at various environmental conditions. The objective of this research was to identify the aflatoxigenic fungal species and their aflatoxin forming potential in selected spices during storage in the laboratory and refrigerator. Dilution series of spice samples namely chilli (Capsicum annum) powder, curry powder, turmeric (Curcurma longa) powder and pepper (Piper nigrum) powder (purchased from two producers) were prepared separately and the frequency of occurrence of aflatoxigenic and other fungi were assessed after plating each on Potato Dextrose Agar and incubating at ambient temperature. Aflatoxin formation of A. flavus was confirmed by growing a pure culture on a SMKY medium and identifying toxins on thin layer chromatographic plates. The presence of aflatoxins in spice samples stored at 30 ± 20C and 40C was also confirmed. Long storage of spices leads to aflatoxin production irrespective of storage temperature hence, it is advisable to consume spices such as chilli powerder, tumeric etc. within a relatively short period to avoid build up of aflatoxins.Item Alkaline lipase from rice bran; Purification. Characterization of and evaluation its potential to use as a bio-detergent(Culture, Globalization and the Developing World, 2nd ICSS, 2013) Weerasooriya, M.K.B.; Singharam, I.Removal of fatty nature stain is a major problem in laundry cleaning. Currently fat containing dirts are removed by saponification at high temperature under high alkaline conditions. The method costs energy as well as lower the texture and quality of textile fabrics. Therefore, there is a need of low temperature active alkaline lipases to save the energy and to maintain the quality of fabrics. Novozyme Company in Denmark, and Genecor International, in India currently produce microbial lipases to use in the detergent industry. Though these commercial lipases stable in alkaline pH, 2-3 wash cycles are needed to obtain a significant removal of lipid stain .Cost production of these enzymes are also high. Hence, their industrial use has been limited. Objective of the paper is to study Purification. Characterization of rice bran lipase and evaluation it?s potential to use as a bio-detergent. Lipase was extracted from rice bran partially purified by DEAE Cellulose chromatography. Its pH stability under alkaline conditions, a temperature kinetics and lipolytic activity towards different lipids were studied. Washing performance tests also carried out to test its potential to remove fatty nature stains. Enzyme showed optimum reactivity at 30-40�C optimum stability around pH 8-10. High lipolytic activity toward all the tested lipids eg. Olive, soybean, sun flower, coconut oil, margarine and butter. Washing performance tests also showed stain caused by coconut oil (1.00ml) can be completely removed by treating the fabric with lipase 1mg/ml at 30�C for 15min. Findings showed that rice bran lipase can be used as a potential candidate in bio-detergent industry.Item Alterations in Protein Kinase C activity after experimental brain injury(Brain Research, 1996) Jayawardena, B.M.; Mark, R.; Dhillon, H.S.; Mattson, M.P.; Prasad, M.R.Item Amylase production by A, niger under solid state fermentation using passion fruit peel as the carbon source(Sri Lanka Association for the Advancement of Science, 2016) Lakmini, S.K.; Weerasooriya, M.K.B.Item An integrated strategy to control post-harvest decay of Embul banana by combining essential oils with modified atmosphere packaging(International Journal of Food science & Technology, 2007) Jayawardena, B.M.; Abeywickrama, K.P.Mature Embul (Musa, AAB) bananas were treated with emulsions of either cinnamon bark or leaf (Cinnamomum zeylanicum) or clove (Syzygium aromaticum) oils to control post-harvest diseases, packed under modified atmosphere (MA) using low-density polyethylene (0.075 mm, LDPE) bags, and stored in a cold room (14 � 1 �C, 90% RH) or at ambient temperature (28 � 2 �C). The effects of the essential oils on post-harvest diseases; physico-chemical properties and organoleptic properties were determined and compared with controls and bananas treated with benomyl. Treatments with cinnamon bark and leaf oils controlled crown rot, whereas clove oil treatment did not affect crown rot development. Treatment with emulsions of cinnamon oils combined with MA packaging can be recommended as a safe, cost-effective method for extending the storage life of Embul bananas up to 21 days in a cold room and 14 days at 28 � 2 �C without affecting the organoleptic and physico-chemical properties.Item Analysis of elemental profiles in selected industrial effluents reaching Kelani River using inductively coupled plasma spectrometry(Sri Lanka Association for the Advancement of Science, 2013) Pathiratne, K.A.S.; Pathiratne, A.; Hemachandra, C.K.; de Silva, N.Item Analysis of undergraduate chemistry scores and the study of correlation between G.C.E. Advanced level Z-scores, with undergraduate chemistry scores in the University of Kelaniya(Sri Lanka Association for the Advancement of Science, 2010) Walgama, C.T.; de Silva, R.C.L.Item Analysis of Volatile Oil inthe Leaves of Murraya koenigii(Trop. Med. Plants, 2002) Paranagama, P.A.; Wimalasena, S.; Jayatilake, G.S.; Jayawardena, A.L.; Senanayake, U.M.; Mubarak, A.M.