Dineth SamarawickramaNational Science and Technology Commission
Dineth Samarawickrama
PhD (University of Colombo) Grad.Chem(I.Chem.C), MBA (Commonwealth Executive, OUSL), Dip. Q.Mgt (SLSI) M.I.Chem.C
About
33
Publications
27,169
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62
Citations
Introduction
Dineth Samarawickrama currently works at the Materials Technology Section, Industrial Technology Institute. Dineth does research in Green Chemistry and Materials Chemistry. Their current project is 'post harvest loss reduction'. He engaged in Natural science and social science researches
Additional affiliations
November 2000 - present
Position
- Research Technologist
Description
- Research on Materials based industries, natural fiber, bio-char, technology development for SME's Statistical analysis and social science researches
Education
September 2012 - January 2020
September 2012 - May 2015
June 2002 - December 2008
Publications
Publications (33)
Nitrogen loss of urea is a major constraint in sustainable agriculture and it directly contributes
to greenhouse gas emissions and climate change. In this study, slow release bio char-urea
inclusion composite (BUIC) was developed to reduce the nitrogen loss via leaching and
increase the nitrogen usage efficiency (NUE) in plants. Urea was dissolved...
Underutilized fruits inherited in Sri Lanka, contain a myriad of health advantages, and have
been recognized since prehistoric times. Nevertheless, due to lack of scientific evidence
about the nutritional and functional benefits, those fruits were very rarely consumed by the
general public. The present study was carried out to explore the relations...
Black tea (Camellia sinensis L.) is one of the main export-based agricultural products in Sri
Lanka. Therefore, it is vital to ensure and maintain the chemical and microbiological quality
of black tea in both export and local markets. Recently, the purity of black tea was affected
by the adulteration of added sugars. As a result, the Sri Lanka Tea...
Properties of high temperature grease can be improved by adding graphite, polymer
additives and fillers. This study focuses on the effects of polyethylene glycol (PEG) with
graphite. Initially, the grease was prepared and varying percentages of PEG and later 25%
graphite was added to each sample. The ASTM D 2265 method was adopted in dropping
point...
Nitrogen loss of urea via ammonia volatilization, de-nitrification, leaching and run off is a
tremendous issue in agricultural sector. It leads to many economic and environmental problems.
In this study, slow release, bio char-urea inclusion composite (BUIC) was developed to reduce
nitrogen loss via leaching, to observe the effect of above treatmen...
A preliminary study on food consumption patterns and preferences of school children in Sri Lanka
A preliminary study on food consumption patterns and preferences of school children in Sri Lanka
1. Abstract Graphite is a naturally occurring form of crystalline carbon found in metamorphic and igneous rocks. The layered structure of graphite is being used as a lubricant in many applications. This study focuses on improving the quality considering the effects on dropping point of grease with addition of graphite which is a vital component as...
Evaluation of stakeholder expectations from a call-center operator
Graphite is a naturally occurring form of crystalline carbon found in metamorphic and igneous rocks. The layered structure of graphite makes it an ideal source of lubricants. This research focuses on improving the quality of grease with the addition of graphite which is very important as it can add different properties to conventional grease. Prepa...
Attempts were made to investigate the mechanical properties of compounded natural latex / natural graphite composites. Compounded natural latex was used to prepare the composites. Different composites were prepared by changing the graphite percentage in compounded latex. All the composites were characterized by using X-ray diffraction (XRD), scanni...
Aim: This survey was conducted to evaluate Sri Lankans' awareness and attitudes towards finger millet and preferences towards finger millet-based foods. Methodology: Pre-tested, self-administrated questionnaires were formulated in the three main languages used in Sri Lanka, namely Sinhala, English and Tamil. The questionnaires consisted of differen...
Issues of air and water pollution and necessity of health care are becoming serious problem as the inter country and global industrialization accelerates. Finding solutions and speedy addressing to these problems via sustainable management and expansion of woody and non woody forest crops, extraction, eco and health friendly products development is...
Covid-19 is spreading throughout the world in a very rapid manner and resulted in a global pandemic situation.
This study was carried out to assess the effect of graphite content in natural rubber (NR)-graphite composites on thermal conductivity (evaluated by thermal-gradient 1 ; lower the thermal-gradient higher the thermal conductivity) and simultaneously on mechanical properties (evaluated by tensile properties). Composites with varying ratios of graphit...
Kottamba, Terminalia catappa L. is an underutilized food source in Sri Lanka. The kernel of the fruit is around 8-10% of dry weight and the husk is a waste. Kottamba fruit is floatable in water and its husk has sponge like microstructure. Therefore, this study was focused on utilization of kottamba husk as a viable source of biochar. The potential...
Purpose Sri Lankan mango consumers are experiencing the massive post-harvest loss at the market and consuming end. The adverse selection of bad mangoes is not merely consumer's incompetence. It is due to value chain malpractices. This study aims to explore the consumer's perspective of critical attributes on selecting good mangoes and their knowled...
Maintaining the quality of perishable commodities during storage and transportation remains a challenge to the fruit and vegetable industry in many countries. In order to minimize post-harvest loss, a hexanal incorporated composite material (HICM) was created using hexanal, banana fibre, polymeric materials, and biopolymers. Efficacy of the HICM wa...
Vehicle emissions cause serious damage to the environment. Adsorption of the emissions is the usual technique being used for remediation. The present work focuses on developing a composite using 4A Zeolite and Calcium oxide (CaO) for effective adsorption of vehicle emissions. The characteristics of the composite under different temperature and comp...
Hexanal was vastly studied as Phospholipase D inhibitor and fruit ripening inhibitor. The HICM was developed for slow releasing of hexanal vapour into the fruit pack at the store. The resultant aroma compounds were analysed using Headspace GCMS technique.
Kano model is extensively studied in New product development studies and strategic marketing discipline. This study was use the Kano model to identify the consumer's purchasing decision making of Sri Lankan mangoes. Current postharvest loss of mangoes was reported as 20-40%. the consumers are further experiencing loss at the consumption. this study...
Banana pseudostems are underutilized in Sri Lanka. Development of eco-friendly packaging material for transportation of fruits and vegetables were studied. the resulted fruit wrap was the natural alternative for styrofoam sleeves.
The structure, the morphology and the thermal behavior of fibers extracted from
common banana varieties (‘Ambun’ (Cavendish AAA), ‘Ambul’ (Mysore AAB),
‘Kolikuttu’ (Silk AAB), ‘Seenikesel’ (Pisang Awak ABB),’ Alukesel’ (ABB) found in Sri
Lanka have been investigated using XRD, FTIR, SEM, and DSC. All the samples
exhibited similar X-ray diffraction...
The structure, the morphology and the thermal behavior of fibers extracted from common banana varieties (‘Ambun’ (Cavendish AAA), ‘Ambul’ (Mysore AAB), ‘Kolikuttu’ (Silk AAB), ‘Seenikesel’ (Pisang Awak ABB),’ Alukesel’ (ABB) found in Sri Lanka have been investigated using XRD, FTIR, SEM, and DSC. All the samples exhibited similar X-ray diffraction...
Contamination of water due to various organic substances such as bacteria, pesticides causes serious health issues. A reactor system was fabricated utilizing renewable solar energy for purification of pollutants dissolved in drinking water. A novel glass tube based prototype reactor was constructed by coating nano-titanium dioxide (TiO2) inside the...
Characterization and Properties of Sri Lankan Coir Fibre
Dineth S. Samarawickrama
Abstract
This study mainly concentrated on revealing the scientific data on the properties of Sri Lankan coir
fibre and classifying them into different grades based on scientific parameters instead of visual
observations to establish quality specifications for the coi...
This study mainly concentrated on revealing the scientific data on the properties of Sri Lankan coir fibre and classifying them into different grades based on scientific parameters instead of visual observations to establish quality specifications for the coir fibre industry in Sri Lanka. Critical parameters were studied for suitability of the indu...
Questions
Questions (4)
Science, Technology and Innovation (STI) of the country having a crucial role on economic development and well being of the society (including environment)
1. How it relate to the human capital?
2. What are the barriers on operationalize STI in a country?
3. How can overcome barriers?
Please state your opinion on the viral youtube music trend created by the "Manike Mage Hithe" music video. The original song, Yohani's cover-up and new different versions created by youngsters to elders in the spectrum of amateur to expert veterans!. Is this viral trend sustainable? How long?
The Sri Lankan economy faces a critical situation due to the Covid-19 pandemic and economic crash due to depletion of Foreign reserves. Meanwhile, Young artist Yohani de Silva released a new Cover-up song for "Manike Mage Hithe" with its original artist Satheeshan Rathnayaka. It turns viral through India due to the endorsement of Indian film actor and the Indian Legend Amitabh Bachchan. Quickly new cover-ups and "tik-tok" battle sho videos were presented from Amateur Youngsters to professional artists worldwide.
At the time of 2021.08.25 midnight, Yohani's official video (#Yohani) has 59.27 Million views (posted on 2021.05.22) and Satheeshan's original video (#aryansmusic) has 14.39 Million views. But various YouTubers presented hundreds of Youtube videos in different languages, instrument plays, reaction videos and reviews, and gossip. At least an increment of 1,000,000 views was observed in Yohani's video channel per six hours. For the case of Satheeshan's original video based on Yohani's coverup, the rise of views was 43,000 per the same period of Six hours!
I have three questions from experts in the ResearchGate
1. Can this amazing song create a new economy in Sri Lanka and India?
2. Is this pattern sustainable or bankrupt after a period of time?
3. what are the factors dependent on viral behaviour?
Thanks
Dineth Samarawickrama, Ph D.
Researcher - Industrial Technology Institute, Sri Lanka
Reviews written by myself for that trend is given for your reference.
Review in the Sinhala language: https://newswave.lk/13316/
Review in English: https://m.facebook.com/story.php?story_fbid=10225149773190021&id=1190503483
Following things to be clarified.
1. can I perform Tukey HSD post-hoc test to compare more than 10 groups?
2. If single group has two replicates can I perform Anova test?
3. If single group has three replicates can I remove outliers?
4. If single group has three replicates, normality and Homogeneity of variance (Levene's test) is reliable
5. If one or more groups violates and others are not violating Anova assumptions (Normality - Shapiro Wilk and Homogeneity of variance - Levene's tests became significant) can I perform Anova?
6. If the case 5 above, what is the best method? Kruskal-Wallis?
Thanks
Dineth
