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 Can castor bean,rubber and tea seeds solve Sri Lanka’s diesel deficit?

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by Chandre Dharmawardana
chandre.dharma@yahoo.ca

According to the “Dilbert Principle“, we rarely recognise our own idiocies, yet we can clearly identify the idiocies of others. Everyone from the Aragalaya man to the “Aemathi Thumaa” has faulted others for the current crisis. And yet, although ordinary citizens can act to resolve the crisis, a culture of confrontation, nurtured by revolutionary ideologies, coupled with unrealistic demands for various “rights” or the resuscitation of ancient myths, has become second nature to Sri Lankans. The government has ground to a halt, and action via citizen groups is essential to deal with the crisis in food and fuel.

In my article in The Island commenting on Mr. Dhammika Perera’s plan to race forex (The Island 13-June-2022), I briefly stated that “Castor is a fast-growing ‘weed’ that is not attacked by pests or livestock. It can be grown among coconut trees or on infertile lands. Its seeds yield a clear oil, directly usable in most diesel engines”. I received many queries on how diesel fuel may be replaced by cheap local oils.

Diesel fuel and electricity are the main energy sources, more important than petrol, that drive the modern world. Wealthy countries produce diesel and maintain reserve stocks as a part of their national security. However, small countries are abjectly dependent on powerful countries that wage war for fossil fuels and control them.

Rudolf Diesel was a 19th century scientist-inventor, influenced by Sadi Carnot’s work in France, that led to the second law of thermodynamics. Diesel was strongly social conscious and moved to help small entrepreneurs, trampled down by wealthy conglomerates who alone controlled the giant steam engines of industry, trains and ships of the late 19th century. In 1892-1895 Diesel patented a compression-ignition engine that ran entirely on vegetable oil, ideally suited for small-farm applications using farm-produced oil. Dashing Diesel’s socialist objectives, his engine became a tool of the Western industrial and military enterprise. By the 1920s, the inexpensive distillate from petroleum crude became the main fuel for Diesel engines, replacing vegetable oil. It is this distillate that is today called “diesel fuel”.

Today, people express surprise that diesel engines may use vegetable oils, since modern engines have been adapted for the distillate from petroleum crude. We describe below how vegetable oils can be used to overcome the fuel crisis, with little or no modification of the engines.

Although coconut oil, peanut oil, etc., can be used, they are very expensive, compared to non-edible waste cooking oil, waste animal fats, castor oil, rubber or tea seed oil, or oils from Madhuka (Sinhalese mee thel) and Neem. Biodiesel is a chemically modified form of vegetable oil, compatible with diesel engines. Our interest is in directly using vegetable oils WITHOUT converting them to standard biodiesel by chemical processing. However, in the following we discus both bio-diesel and use of untransformed vegetable oils.

The 2020 world market prices of natural gas, gasoline, diesel and bio-diesel were US$ 2.18, 2.18, 2.4, and 3.33 per gallon respectively. The current prices change rapidly, but the international price of bio-diesel is irrelevant when the fuel is made locally, without forex. Untransformed vegetable oils, produced in the farm, is an unbeatable option when used for running farm machinery and generating electricity.

Lankan scientists and engineers have argued, even before independence, that unlike many countries, Sri Lanka has unique attributes to achieve self-sufficiency in food and energy, due to its rainfall, reservoirs and biodiversity. In the 1970s some of us had undertaken a study of what was then called “alternative technologies”, and the concepts evolved were presented in a BBC movie. That, too, was a time of food and forex shortages under the Sirimavo government. Today, Sri Lanka is in more dire straits. Hence a return to basic “alternative technologies” achievable within the naturally available resources of the country, is needed, irrespective of the availability of more loans and moans from the IMF.

Direct use of vegetable oils as diesel fuel.

Oil from castor seed (up to 3 tonnes/ha of which nearly 50% is oil) is a good fit to meet Sri Lanka’s urgent needs. It grows easily and rapidly on infertile soil, with few pests or enemies. Similarly, rubber seed (up to 2 tonnes/ha) and tea seed (3-4 tonnes/ha) are mostly left discarded. The main difficulty in using castor or other vegetable oils in modern diesel engine is their high viscosity. Castor oil is some 75 times more viscous than diesel fuel at 400C. Tea-seed oil and rubber-seed oil are better, being only 9-12 times more viscous. We found in our experiments that castor oil, at suitably high temperatures, achieved a viscosity matching diesel.

However, the use of elevated temperatures (above the boiling point of water) raises serious safety and insurance issues, and the method is more suited for stationary diesel engines. Stationary engines can generate electricity and charge batteries that power electric cars and farm equipment. The viscosity of the oils from rubber and tea seed, depending on quality, may be lowered to the viscosity of diesel fuel at easily accessible temperatures. Thus, the hot coolant water (radiator fluid) of the diesel engine could be re-circulated to heat the rubber-seed oil for direct use in a diesel engine. However, more research is needed to implement the hot-fluid system for which only preliminary studies are available.

A simple approach for the direct use of vegetable oils in diesel engines is to dilute the vegetable oil with compatible solvents, like ethyl acetate, that can be produced locally using alcohol and acetic acid, both being products of fermentation of biomass. Considerable work has been done in Brazil and Spain in developing such approaches, using dissolved-vegetable oils.

Indirect use of vegetable oils by converting to biodiesel by trans-esterification.

The commercialized method for using vegetable oils is to convert them to bio-diesel using “esterification”. Here the vegetable oil is treated with a substance, like sodium hydroxide and methyl alcohol (wood alcohol) or ethyl alcohol (spirits of wine), when a layer of glycerol settles to the bottom, and a lighter liquid separates to the top. The top layer is the desired “bio-diesel”. This “trans-esterification” process is highly optimized in industrial production to get optimal yields and reduced costs. However, do-it-yourself conversions of waste cooking oil to bio-diesel is a win-win situation in providing the otherwise unavailable diesel fuel to forex-poor consumers.

A “recipe” for converting castor oil or waste cooking oil (e.g., from cooking oils, like sunflower oil) can be developed using known chemical data for the fatty acids in these oils. We illustrate the method for one litre of waste cooking, giving the rough amounts of ingredients needed, noting that trial and error adjustments are needed for different waste oils.

1. One litre of moisture-free waste cooking oil, filtered to remove frying residues.

2. 3.5-4.0 g sodium hydroxide (not more than 0.1 moles). This is a corrosive substance that should be kept dry.

3. 200 ml (about 4.5 moles) of dry methyl alcohol (wood alcohol) or ethyl alcohol (~ 4.5 moles).

4. Blend (at low speed) the methyl alcohol and the sodium hydroxide until completely dissolution, to be used immediately as it absorbs moisture from the air.

5. Add the filtered cooking oil and blend at low speed for about 1/2 hour. Reaction is facilitated if the blending vessel is kept warm.

6. Let stand until the liquid separates into two layers.

7. The top layer is the bio-diesel, and the bottom layer (glycerol) is drained out.

This is a simple procedure that a cooperative of restaurants or households in a neighbourhood can use to convert their waste cooking oil into diesel fuel. This oil can also be used to fuel an oil-burning cooker or stove instead of using LNG, soot-generating charcoal or wood for cooking.

The biodiesel can be used directly (or mixed with petroleum diesel) as fuel in a standard diesel engine. If the untreated vegetable oil were used (either by using the heated oil, in an engine equipped to heat the input oil held in an auxiliary fuel tank, or by blending with a solvent like ethyl acetate), then (a) the expense for sodium hydroxide and methyl alcohol can be avoided, (b) even the glycerol gets used as a fuel and so the full energy content of the vegetable oil is used in the diesel engine. Otherwise almost half the energy content is lost as waste glycerol. Furthermore, since glycerol is an oxygen-rich chemical, it promotes a cleaner burn in the engine; the exhaust gases contain less soot and less noxious oxides.

Undoubtedly, many owners of high-end diesel cars will hesitate to use artisanal bio-fuels in their cars unless rigorous quality controls are imposed. Private companies, estates, and small entrepreneurs should lead in producing and using bio-diesel or vegetable oils, in diesel engines, without waiting for government action.



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Wishes, Resolutions and Climate Change

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Exchanging greetings and resolving to do something positive in the coming year certainly create an uplifting atmosphere. Unfortunately, their effects wear off within the first couple of weeks, and most of the resolutions are forgotten for good. However, this time around, we must be different, because the nation is coming out of the most devastating natural disaster ever faced, the results of which will impact everyone for many years to come. Let us wish that we as a nation will have the courage and wisdom to resolve to do the right things that will make a difference in our lives now and prepare for the future. The truth is that future is going to be challenging for tropical islands like ours.

We must not have any doubts about global warming phenomenon and its impact on local weather patterns. Over its 4.5-billion-year history, the earth has experienced drastic climate changes, but it has settled into a somewhat moderate condition characterised by periods of glaciation and retreat over the last million years. Note that anatomically modern Homo sapiens have been around only for two to three hundred thousand years, and it is reasoned that this stable climate may have helped their civilisation. There have been five glaciation periods over the last five hundred thousand years, and these roughly hundred-thousand-year cycles are explained by the astronomical phenomenon known as the Milankovitch Cycle (the lows marked with stars in Figure 1). At present, the earth is in an inter glacial period and the next glaciation period will be in about eighty thousand years.

(See Figure 1. Glaciation Cycles)

During these cycles, the global mean temperature has changed by about 7-8 degrees Centigrade. In contrast to this natural variation, earth has been experiencing a rapid temperature increase over the past hundred years. There is ample scientific evidence from multiple sources that this is caused by the increase in carbon dioxide gas in the atmosphere, which has seen a 50% increase over the historical levels in just hundred years (Figure 2). Carbon dioxide is one of the greenhouse gases which traps heat from the sun and slows the natural cooling process of the earth. This increase of carbon dioxide is due to human activities: fossil fuel burning, industrial processes, deforestation, and agricultural practices. Ironically, those who suffer from the consequences did not contribute to these changes; those who did contribute are trying their best to convince the world that the temperature changes we see are natural, and nothing should be done. We must have no illusions that global warming is a human-caused phenomenon, and it has serious repercussions.

(See Figure 2. Global Temperature and Carbon Dioxide Levels)

Why should we care about global warming? Well, there are many reasons, but let us focus on earth’s water cycle. Middle schoolers know that water evaporates from the oceans, rises into the atmosphere where it cools, condenses, and falls back onto earth as rain or snow. When the oceans warm, the evaporation increases, and the warmer atmosphere can hold more water vapour. Water laden atmosphere results in severe and erratic weather. Ironically, water vapour is also a greenhouse gas, and this has a snowballing effect. The increased ocean temperature also disrupts ocean currents that influence the weather on land. The combined result is extreme and severe weather: violent storms and droughts depending on the geographic location. What is happening on the West coast of the USA is an example. The net result will be major departures from what is considered normal weather over millennia.

International organisations have been talking for 30 years about limiting global temperature increase to 1.5oC above pre-industrial levels by curtailing greenhouse gas emissions. But not much has been done and the temperature has risen by 1.2oC already. The challenge is that even if we can stop greenhouse gas emissions completely, right now, we have the problem of removing already existing 2,500 billion tons of carbon from the atmosphere, for which there are no practical solutions yet. Scientists worry about the consequences of runaway temperature increase and its effect on human life, which are many. It is not a doomsday prediction of life disappearing from earth, but a warning that life will be quite different from what humans are used to. All small tropical nations like ours are burdened with mitigating the consequences; in other words, get ready for more Ditwahs, do not wait for the twelve-day forecast.

Some opined that not enough warning was given regarding Ditwah; the truth is that the tools available for long-term prediction of the path or severity of a weather event (cyclone, typhoon, hurricane, tornado) are not perfect. There are multitude of rapidly changing factors contributing to the behavior of weather events. Meteorologists feed most up to date data to different computer models and try to identify the prediction with the highest probability. The multiple predictions for the same weather event are represented by what is known as spaghetti plots. Figure 3 shows the forecasted paths of a 2019 Atlantic hurricane five days ahead on the right and the actual path it followed on the left. While the long-term prediction of the path of a cyclone remains less accurate, its strength can vary within hours. There are several Indian ocean cyclones tracking sites online accessible to the public.

Figure 3. Forecasting vs Reality

There is no argument that short-term forecasts of this nature are valuable in saving lives and movable assets, but having long term plans in place to mitigate the effects of natural disasters is much more important than that. If a sizable section of the population must start over their lives from ground zero after every storm, how can a country economically develop?

The degree of our unpreparedness came to light during Ditwah disaster. It is not for lack of awareness; judging by the deluge of newspaper articles, blogs, vlogs, and speeches made, there is no shortage of knowledge and technical expertise to meet the challenge. The government has assured the necessary resources, and there is good reason to trust that the funds will be spent properly and not to line the pockets as happened during previous disasters. However, history tells us that despite the right conditions and good intentions, we could miss the opportunity again. Reasons for such skepticisms emerged during the few meetings the President held with the bureaucrats while visiting effected areas. Also, the COPE committee meetings plainly display the inherent inefficiencies and irregularities of our system and the absence of work ethics among all levels of the bureaucracy.

What it tells us is that we as a nation have an attitude problem. There are ample scholarly analyses by local as well as international researchers on this aspect of Sri Lankan psyche, and they label it as either island or colonial mentality. The first refers to the notion of isolated communities perceiving themselves as exceptional or superior to the rest of the world, and that the world is hell-bent on destroying or acquiring what they have. This attitude is exacerbated by the colonial mentality that promoted the divide and conquer rules and applied it to every societal characteristic imaginable; and plundered natural resources. As a result, now we are divided along ethnic, linguistic, religious, political, class, caste, geography, wealth, and many more real and imagined lines. Sadly, politicians, some religious leaders, and other opportunists keep inflaming these sentiments for their benefit when most of the population is willing to move on.

The first wish, therefore, is to get the strength, courage, and wisdom to think rationally, and discard outdated and outmoded belief systems that hinder our progress as a nation. May we get the courage to stop venerating elite who got there by exploiting the masses and the country’s wealth. More importantly, may we get the wisdom to educate the next generation to be free thinkers, give them the power and freedom to reject fabrications, myths, and beliefs that are not based on objective facts.

This necessitates altering our attitude towards many aspects of life. There is no doubt that free thinking does not come easily, it involves the proverbial ‘exterminating the consecrated bull.’ We are rightfully proud about our resplendent past. It is true that hydraulic engineering, art, and architecture flourished during the Anuradhapura period.

However, for one reason or another, we have lost those skills. Nowadays, all irrigation projects are done with foreign aid and assistance. The numerous replicas of the Avukana statue made with the help of modern technology, for example, cannot hold a candle to the real one. The fabled flying machine of Ravana is a figment of marvelous imagination of a skilled poet. Reality is that today we are a nation struggling with both natural and human-caused disasters, and dependent on the generosity of other nations, especially our gracious neighbor. Past glory is of little help in solving today’s problems.

Next comes national unity. Our society is so fragmented that no matter how beneficial a policy or an idea for the nation could be, some factions will oppose it, not based on facts, but by giving into propaganda created for selfish purposes. The island mentality is so pervasive, we fail to trust and respect fellow citizens, not to mention the government. The result is absence of long-term planning and stability. May we get the insight to separate policy from politics; to put nation first instead of our own little clan, or personal gains.

With increasing population and decreasing livable and arable land area, a national land management system becomes crucial. We must have an intelligent zoning system to prevent uncontrolled development. Should we allow building along waterways, on wetlands, and road easements? Should we not put the burden of risk on the risk takers using an insurance system instead of perpetual public aid programs? We have lost over 95% of the forest cover we had before European occupation. Forests function as water reservoirs that release rainwater gradually while reducing soil erosion and stabilizing land, unlike monocultures covering the hill country, the catchments of many rivers. Should we continue to allow uncontrolled encroachment of forests for tourism, religious, or industrial purposes, not to mention personal enjoyment of the elite? Is our use of land for agricultural purposes in keeping with changing global markets and local labor demands? Is haphazard subsistence farming viable? What would be the impact of sea level rising on waterways in low lying areas?

These are only a few aspects that future generations will have to grapple with in mitigating the consequences of worsening climate conditions. We cannot ignore the fact that weather patterns will be erratic and severe, and that will be the new normal. Survival under such conditions involves rational thinking, objective fact based planning, and systematic execution with long term nation interests in mind. That cannot be achieved with hanging onto outdated and outmoded beliefs, rituals, and traditions. Weather changes are not caused by divine interventions or planetary alignments as claimed by astrologers. Let us resolve to lay the foundation for bringing up the next generation that is capable of rational thinking and be different from their predecessors, in a better way.

by Geewananda Gunawardana

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From Diyabariya to Duberria: Lanka’s Forgotten Footprint in Global Science

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Snakes and their name origins in Sinhala

For centuries, Sri Lanka’s biological knowledge travelled the world — anonymously. Embedded deep within the pages of European natural history books, Sinhala words were copied, distorted and repurposed, eventually fossilising into Latinised scientific names of snakes, bats and crops found thousands of kilometres away.

Africa’s reptiles, Europe’s taxonomic catalogues and global field guides still carry those echoes, largely unnoticed and uncredited.

Now, a Sri Lankan herpetologist is tracing those forgotten linguistic footprints back to their source.

Through painstaking archival research into 17th- and 18th-century zoological texts, herpetologist and taxonomic researcher Sanjaya Bandara has uncovered compelling evidence that several globally recognised scientific names — long assumed to be derived from Greek or Latin — are in fact rooted in Sinhala vernacular terms used by villagers, farmers and hunters in pre-colonial Sri Lanka.

“Scientific names are not just labels. They are stories,” Bandara told The Island. “And in many cases, those stories begin right here in Sri Lanka.”

Sanjaya Bandara

At the heart of Bandara’s work is etymology — the study of word origins — a field that plays a crucial role in zoology and taxonomy.

While classical languages dominate scientific nomenclature, his findings reveal that Sinhala words were quietly embedded in the foundations of modern biological classification as early as the 1700s.

One of the most striking examples is Ahaetulla, the genus name for Asian vine snakes. “The word Ahaetulla is not Greek or Latin at all,” Bandara explained. “It comes directly from the Sinhala vernacular used by locals for the Green Vine Snake.” Remarkably, the term was adopted by Carl Linnaeus himself, the father of modern taxonomy.

Another example lies in the vespertilionid bat genus Kerivoula, described by British zoologist John Edward Gray. Bandara notes that the name is a combination of the Sinhala words kiri (milky) and voula (bat). Even the scientific name of finger millet, Eleusine coracana, carries linguistic traces of the Sinhala word kurakkan, a cereal cultivated in Sri Lanka for centuries.

Yet Bandara’s most intriguing discoveries extend far beyond the island — all the way to Africa and the Mediterranean.

In a research paper recently published in the journal Bionomina, Bandara presented evidence that two well-known snake genera, Duberria and Malpolon, both described in 1826 by Austrian zoologist Leopold Fitzinger, likely originated from Sinhala words.

The name Duberria first appeared in Robert Knox’s 1681 account of Ceylon, where Knox refers to harmless water snakes called “Duberria” by locals. According to Bandara, this was a mispronunciation of Diyabariya, the Sinhala term for water snakes.

“Mispronunciations are common in Knox’s writings,” Bandara said. “English authors of the time struggled with Sinhala phonetics, and distorted versions of local names entered European literature.”

Over time, these distortions became formalised. Today, Duberria refers to African slug-eating snakes — a genus geographically distant, yet linguistically tethered to Sri Lanka.

Bandara’s study also proposes the long-overdue designation of a type species for the genus, reviving a 222-year-old scientific name in the process.

Equally compelling is the case of Malpolon, the genus of Montpellier snakes found across North Africa, the Middle East and southern Europe. Bandara traced the word back to a 1693 work by English zoologist John Ray, which catalogued snakes from Dutch India — including Sri Lanka.

“The term Malpolon appears alongside Sinhala vernacular names,” Bandara noted. “It is highly likely derived from Mal Polonga, meaning ‘flowery viper’.” Even today, some Sri Lankan communities use Mal Polonga to describe patterned snakes such as the Russell’s Wolf Snake.

Bandara’s research further reveals Sinhala roots in the African Red-lipped Herald Snake (Crotaphopeltis hotamboeia), whose species name likely stems from Hothambaya, a regional Sinhala term for mongooses and palm civets.

“These findings collectively show that Sri Lanka was not just a source of specimens, but a source of knowledge,” Bandara said. “Early European naturalists relied heavily on local names, local guides and local ecological understanding.”

Perhaps the most frequently asked question Bandara encounters concerns the mighty Anaconda. While not a scientific name, the word itself is widely believed to be a corruption of the Sinhala Henakandaya, another snake name recorded in Ray’s listings of Sri Lankan reptiles.

“What is remarkable,” Bandara reflected, “is that these words travelled across continents, entered global usage, and remained there — often stripped of their original meanings.”

For Bandara, restoring those meanings is about more than taxonomy. It is about reclaiming Sri Lanka’s rightful place in the history of science.

“With this study, three more Sinhala words formally join scientific nomenclature,” he said.

“Who would have imagined that a Sinhala word would be used to name a snake in Africa?”

Long before biodiversity hotspots became buzzwords and conservation turned global, Sri Lanka’s language was already speaking through science — quietly, persistently, and across continents.

By Ifham Nizam

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Children first – even after a disaster

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However, the children and their needs may be forgotten after a disaster.

Do not forget that children will also experience fear and distress although they may not have the capacity to express their emotions verbally. It is essential to create child-friendly spaces that allow them to cope through play, draw, and engage in supportive activities that help them process their experiences in a healthy manner.

The Institute for Research & Development in Health & Social Care (IRD), Sri Lanka launched the campaign, titled “Children first,” after the 2004 Tsunami, based on the fundamental principle of not to medicalise the distress but help to normalise it.

The Island picture page

The IRD distributed drawing material and play material to children in makeshift shelters. Some children grabbed drawing material, but some took away play material. Those who choose drawing material, drew in different camps, remarkably similar pictures; “how the tidal wave came”.

The Island” supported the campaign generously, realising the potential impact of it.

The campaign became a popular and effective public health intervention.

“A public health intervention (PHI) is any action, policy, or programme designed to improve health outcomes at the population level. These interventions focus on preventing disease, promoting health, and protecting communities from health threats. Unlike individual healthcare interventions (treating individuals), which target personal health issues, public health interventions address collective health challenges and aim to create healthier environments for all.”

The campaign attracted highest attention of state and politicians.

The IRD continued this intervention throughout the protracted war, and during COVID-19.

The IRD quick to relaunch the “children first” campaign which once again have received proper attention by the public.

While promoting a public health approach to handling the situation, we would also like to note that there will be a significant smaller percentage of children and adolescents will develop mental health disorders or a psychiatric diagnosis.

We would like to share the scientific evidence for that, revealed through; the islandwide school survey carried out by the IRD in 2007.

During the survey, it was found that the prevalence of emotional disorder was 2.7%, conduct disorder 5.8%, hyperactivity disorder was 0.6%, and 8.5% were identified as having other psychiatric disorders. Absenteeism was present in 26.8%. Overall, previous exposure to was significantly associated with absenteeism whereas exposure to conflict was not, although some specific conflict-related exposures were significant risk factors. Mental disorder was strongly associated with absenteeism but did not account for its association with tsunami or conflict exposure.

The authors concluded that exposure to traumatic events may have a detrimental effect on subsequent school attendance. This may give rise to perpetuating socioeconomic inequality and needs further research to inform policy and intervention.

Even though, this small but significant percentage of children with psychiatric disorders will need specialist interventions, psychological treatment more than medication. Some of these children may complain of abdominal pain and headaches or other physical symptoms for which doctors will not be able to find a diagnosable medical cause. They are called “medically unexplained symptoms” or “somatization” or “bodily distress disorder”.

Sri Lanka has only a handful of specialists in child and adolescent psychiatric disorders but have adult psychiatrists who have enough experience in supervising care for such needy children. Compared to tsunami, the numbers have gone higher from around 20 to over 100 psychiatrists.

Most importantly, children absent from schools will need more close attention by the education authorities.

In conclusion, going by the principles of research dissemination sciences, it is extremely important that the public, including teachers and others providing social care, should be aware that the impact of Cyclone Ditwah, which was followed by major floods and landslides, which is a complex emergency impact, will range from normal human emotional behavioural responses to psychiatric illnesses. We should be careful not to medicalise this normal distress.

It’s crucial to recall an important statement made by the World Health Organisation following the Tsunam

Prof. Sumapthipala MBBS, DFM, MD Family Medicine, FSLCFP (SL), FRCPsych, CCST (UK), PhD (Lon)]

Director, Institute for Research and Development in Health and Social Care, Sri Lanka

Emeritus Professor of Psychiatry, School of Medicine, Faculty of Medicine & Health Sciences, Keele University, UK

Emeritus Professor of Global Mental Health, Kings College London

Secretary General, International society for Twin Studies 

Visiting Professor in Psychiatry and Biomedical Research at the Faculty of Medicine, Kotelawala Defence University, Sri Lanka

Associate Editor, British Journal Psychiatry

Co-editor Ceylon Medical Journal.

Prof. Athula Sumathipala

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