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List of contemporary Iranian scientists, scholars, and engineers - Wikipedia, the free encyclopedia
List of Persian scientists and scholars - Wikipedia, the free encyclopedia
According to the Institute for Scientific Information (ISI), Iran increased its academic publishing output nearly tenfold from 1996 to 2004, and has been ranked first globally in terms of output growth rate (followed by China with a 3 fold increase). In comparison, the only G8 countries in top 20 ranking with fastest performance improvement are, Italy which stands at tenth and Canada at 13th globally. Iran, China, India and Brazil are the only developing countries among 31 nations with 97.5% of the world's total scientific productivity. The remaining 162 developing countries contribute less than 2.5% of the world's scientific output. Despite the massive improvement from 0.0003% of the global scientific output in 1970 to 0.29% in 2003, still Iran's total share in the world's total output remained small. According to Thomson Reuters, Iran has demonstrated a remarkable growth in science and technology over the past one decade, increasing its science and technology output fivefold from 2000 to 2008. Most of this growth has been in engineering and chemistry producing 1.4% of the world's total output in the period 2004-2008. By year 2008, Iranian science and technology output accounted for 1.02% of the world's total output (That is ~340,000% growth in 37 years of 1970-2008). 25% of scientific articles published in 2008 by Iran were international coauthorships. The top five countries coauthoring with Iranian scientists are US, UK, Canada, Germany and France.
A 2010 report by Canadian research firm Science-Metrix has put Iran in the top rank globally in terms of growth in scientific productivity with a 14.4 growth index followed by South Korea with a 9.8 growth index. Iran's growth rate in science and technology is 11 times more than the average growth of the world's output in 2009 and in terms of total output per year, Iran has already surpassed the total scientific output of countries like Sweden, Switzerland, Israel, Belgium, Denmark, Finland, Austria or that of Norway. The report further notes that Iran's scientific capability build-up has been the fastest in the past two decades and that this build-up is in part due to the Iraqi invasion of Iran, the subsequent bloody Iran Iraq war and Iran's high casualties due to the international sanctions in effect on Iran as compared to the international support Iraq enjoyed. The then technologically superior Iraq and its use of chemical weapons on Iranians, made Iran to embark on a very ambitious science developing program by mobilizing scientists in order to offset its international isolation, and this is most evident in the country's nuclear sciences advancement, which has in the past two decades grown by 8,400% as compared to the 34% for the rest of the world. This report further predicts that though Iran's scientific advancement as a response to its international isolation may remain a cause of concern for the world, all the while it may lead to a higher quality of life for the Iranian population but simultaneously and paradoxically will also isolate Iran even more because of the world's concern over Iran's technological advancements. Other findings of the report point out that the fastest growing sectors in Iran are Physics, Public health sciences, Engineering, Chemistry and Mathematics. Overall the growth has mostly occurred after 1980 and specially has been becoming faster since 1991 with a significant acceleration in 2002 and an explosive surge since 2005. It has been argued that scientific and technological advancement besides the nuclear program is the main reason for United States worry about Iran, which may become a superpower in the future. Some in Iranian scientific community see sanctions as a western conspiracy to stop Iran's rising rank in modern science and allege that some (western) countries want to monopolize modern technologies.
Iranian among top world scientists
The latest ranking of Web of Knowledge, which is based on articles written by scientists, shows Professor Hossein Najmabadi is among the top 1 percent of world scientists.
Najmabadi is a medical scientist at the University of Social Welfare and Rehabilitation Sciences (USWR) and founder of Genetics Research Center (GRC), Mehr News Agency reported.
He is known for his significant contribution to the genetics of mental retardation.
The Iranian scientist studied biology at the University of North Texas and received a PhD in molecular biology from the same university in 1989. He then joined UCLA as a postdoc and was appointed a faculty member of Charles Drew University of Medicine & Science-UCLA in 1995.
Najmabadi has published more than 100 peer-reviewed papers in international journals in the field of medical genetics and cancer genetics.
His recent studies were focused on preventing genetic disabilities and disorders through the establishment of a nationwide strategy for the early prenatal diagnosis of genetic disorders. In five areas of preventable genetic disorders, Najmabadi leads projects that not only apply preventive solutions within the population, but also involve nationally and internationally collaborative research to improve the quality of life nationwide.
An interdisciplinary study led by Dr Ali Tavassoli, a Reader in chemical biology at the University of Southampton, has shown for the first time that 'click chemistry' can be used to assemble DNA that is functional in human cells, which paves the way for a purely chemical method for gene synthesis.
Writing in Angewandte Chemie International Edition Dr Tavassoli's team and his collaborators, Dr Jeremy Blaydes and Professor Tom Brown, show that human cells can still read through strands of DNA correctly despite being stitched together using a linker not found in nature.
The artificially linked DNA was created by joining oligonucleotides using click chemistry -- chemistry tailored to mimic nature which generates substances quickly and reliably by joining small units together.
This click technique is highly efficient and boasts a number of advantages over the usual approaches to assembling DNA strands in the lab using a combination of DNA synthesis, PCR amplification and enzymatic ligation.
"As chemists we always sought to synthesise long strands of DNA but have been limited by our assumption that the phosphodiester bond is necessary for DNA to function in cells," says Dr Tavassoli. The DNA backbone is made up of pentose sugars and phosphate groups that stitch the nucleotides together using phosphodiester bonds. This backbone acts as the scaffold for the four bases that make up the genetic code.
The click DNA approach relies on a rapid and efficient stitching together of modified DNA strands using the copper-catalysed alkyne-azide cycloaddition reaction. Click-linking DNA leaves behind a triazole group in the backbone and it was feared that cellular machinery would be unable to read these unnaturally joined DNA strands. The new study demonstrated error-free transcription in human cells, the first example of a non-natural DNA linker working correctly in eukaryotic cells.
"This is important because it shows that we don't have to stick to the phosphodiester backbone of the DNA at the site of DNA ligation," Dr Tavassoli explains. "This suggests that we can replace the enzymatic methods for DNA assembly and DNA ligation with highly efficient chemical reactions."
"This is a mind blowing advance that demonstrates chemistry's power to manipulate nature's nature," comments Nobel laureate Barry Sharpless at the Scripps Research Institute, US, who first described the click chemistry process. "I only dreamed I'd get to see click chemistry do this in my lifetime. It is a marvellous achievement."
Iranian helps cultivate synthetic stem cells
Scientists at the University of California and British Surrey University along with an Iranian researcher Azin Fahimi have developed a new method to cultivate stem cells that does not originate from human and animal cells.
Earlier, stem cells have been cultivated using animal proteins or by growing them from other human cells, ISNA reported.
Both methods come with associated problems. But, according to a study published in the journal Applied Materials & Interfaces, researchers have now identified a new method for cultivating stem cells.
Stem cells are able to divide or regenerate indefinitely. This allows the stem cells to generate into a range of cell types for the organ that they originate from, or they may even be able to regenerate the whole organ.
Because of this, scientists are interested in using stem cells in a range of medical treatments, to replenish damaged tissue in the brain or skin, or as a treatment for blood diseases.
In adults, these stem cells have been found in tissues such as the brain, bone marrow, blood, blood vessels, skeletal muscles, skin and liver. Adult stem cells only become ‘activated’ and start dividing and generating new cells when their host tissue becomes damaged by disease or injury.
A more potent kind of stem cell is found in human embryos, which has the unique ability to grow into any kind of cell in the human body. But using these cells in scientific research is controversial—and illegal in some countries—as harvesting them requires the destruction of a fertilized human egg (a ‘blastocyst’) that has not had the chance to develop into a baby.
Stem cells can be grown in laboratories using animal proteins, but these cannot be used in the treatment of humans. An alternative method of growing stem cells on other human cells is risky, as the cells could be contaminated and may transmit disease to the patient.
Now, Prof. Peter Donovan from the University of California and a team of scientists at the University of Surrey in the UK have developed a new method for cultivating stem cells, which involves using carbon ‘nanotubes’ as a ‘scaffold’ from which human stem cells can be grown. The new synthetic cell structure allows stem cells effective in humans to be grown safely in the laboratory.
Dr. Alan Dalton, senior lecturer from the Department of Physics at the University of Surrey, said, “While carbon nanotubes have been used in the field of biomedicine for some time, their use in human stem cell research has not previously been explored successfully.”
This scaffolding imitates the supporting cells in the human body that stem cells would have been grown on. The creation of this synthetic cell structure now allows stem cells effective in humans to be grown safely in the laboratory.
The researchers think that this new development will open doors to “revolutionary steps” in replacing tissue after injury or disease.
Dr. Dalton said, “Synthetic stem cell scaffolding has the potential to change the lives of thousands of people suffering from diseases such as Parkinson’s, diabetes and heart disease, as well as vision and hearing loss. It could lead to cheaper transplant treatments and could potentially one day allow us to produce whole human organs without the need for donors.”
Recently, Medical News Today reported on a study finding that stem cells could be harvested from tissue discarded in routine hip replacement operations.
Iran to Build Human Spare Parts
Researchers at Shahid Beheshti University of Medical Sciences are making attempts to build human spare parts for transplantation.
Hossein Niknejad, the head of New Technologies Faculty at Shahid Beheshti University of Medical Sciences and Health Services, said the faculty is currently focused on building spare parts through tissue engineering in an attempt to build human spare parts such as kidneys, heart, blood vessels, liver and skin, Tehran-based English newspaper, Iran Daily, reported.
“Currently, 26,000 patients in Iran annually join the waiting list for a kidney transplant. Each year, the number has a 12-percent increase which makes the number of kidney donations very insufficient for meeting the country's need for organ transplant,” he said.
Niknejad also said one of the difficulties in kidney transplant was its rejection from the host body after a few years. He added that building spare parts through tissue engineering was a way to resolve this problem.
“Iran is currently researching and conducting experiments in this area. The Faculty of New Technologies is working on a project to build an organ from the recipient’s cells,” he said.
“Currently, the scaffolds for the spare parts are undergoing the production phase and we have made good progress in turning stem cells into kidney cells.”
Scientists in Iran clone endangered mouflon – born to domestic sheep
Article #1: The baby mouflon, which has been named Maral, is the result of a four-year project at the Royan Institute.
A domestic sheep has given birth to a baby mouflon in a rare successful example of interspecies cloning, according to scientists in Iran.
The wild Isfahan mouflon – or ovis orientalis isphahanica – was cloned by researchers at Iran’s Royan Institute, which is dedicated to reproductive biomedicine and stem cell research, using the domestic sheep as a surrogate mother.
Poaching has driven the Isfahan mouflon close to extinction in Iran. The cloned mouflon, which looks similar to a deer, has been named Maral, a Persian name for a reindeer and for new babies, which means svelte.
Established in 1991, Royan has been a pioneer of IVF in the Islamic republic, where infertile couples have easy access to such treatments at reasonable costs compared to western equivalents. It has also drawn many tourist patients from across the Middle East. Iran has progressive fertility treatment and reproductive health programmes, with Shia clerics in the country largely supportive of such scientific practices.
Mohammad Hossein Nasr-Esfahani, the head of the biomedical research centre at Royan, said the motivation for the project was conservation. Royan became the first place in the Middle East to start working on animal cloning seven years ago and the birth of Maral marks the first successful attempt at interspecies cloning involving an endangered species in the country.
“We have been working on the project for around four years,” he told the Guardian. “Conservation of wildlife is an important concept in developing countries, and so far a few successful projects involving birth of wild animals by interspecies cloning have been achieved worldwide.”
To clone animals scientists take cells from one individual and insert them into an unfertilised donor egg which then develops into an embryo. In this case, the embryo was carried by a surrogate sheep, after a biopsy had been obtained from a mouflon. Domestic sheep oocytes were taken from abattoir ovaries, and the best embryos were transferred to the surrogate sheep.
Nasr-Esfahani said: “The cloning technique is very efficient in our view, and so far we have cloned a herd of goats. The last sheep that we cloned lived for over five years. This mouflon is healthy and 14 days have passed since its birth. We hope to donate the sheep to the city zoo where they can provide a suitable habitat for it.”
Article #2: Cloning is controversial among animal welfare activists, who say cloned animals are more susceptible to abnormalities and die soon after birth. In 2009, cloning was used in an attempt to save an endangered goat species, the Pyrenean ibex, from extinction in Europe, but the newborn died shortly after birth due to breathing complications.
The most famous animal to be cloned was Dolly the sheep, born in 1996. Last year, the birth of Britain’s first cloned dog was dismissed as a “ridiculous waste of money”, while the quest to clone a mammoth has also been the subject of much controversy.
“From an animal welfare point of view, cloning is a very wasteful process,” said Penny Hawkins, head of the research animals department at RSPCA. “Large numbers of embryos would have been created and implanted into female sheep in order to get the cells to make those cloned embryos, animals may well have undergone painful procedures to obtain the tissue.”
Hawkins said the ethical issues relate to “the inherently wasteful nature of the process”. She said: “It’s all very well cloning endangered species but if you haven’t got the natural habitat to put them into you can argue, what’s the point doing it at all? What’s the point manipulating animals and causing suffering and causing risks to the mother animals when maybe there’s the case that the population of endangered animals still can’t be saved because their habitat has been destroyed?”
Scientists may argue practice makes perfect. But Hawkins is not convinced. “It’s highly likely that the process will become more successful because procedures tend to be improved and refined and success rates tend to increase,” she said. “But the whole point is: is it right to use these sort of procedures to manipulate animals in this way with risk to their health and welfare?”
“There’s no point cloning endangered species if they have nowhere to live; you should look at the bigger picture, preserve the habitat as well and not just do something because you can. Just because something can be done it doesn’t mean it should be done.”