Innovative magnesium sheet production process licensed This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Explore further More information: www.magpowersystems.com/ A small amount of magnesium ribbon burns in a flame with a satisfying white heat. Magnesium + Oxygen + Water + Salt + Additive = Direct Current Credit: MagPower Systems, Inc The MAFC (magnesium-air fuel cell) has the electrolyte versatility of using a common saline (salt) solution or ocean water. The performance capabilities of the MAFC can be enhanced through the addition of MagPower’s hydrogen inhibitors.According to MagPower Systems, by using hydrogen inhibitors the MAFC has increased power efficiency, lower cell resistance, and the reduction or elimination of pressure and/or volume increase due to hydrogen gassing resulting in smaller metal-air fuel cells, and batteries.Magnesium is highly reactive and stores a lot of energy. Researchers are now devising ways to extract energy from magnesium in a more controlled method. (PhysOrg.com) — There is enough magnesium to meet the world’s energy needs for the next 300,000 years, says Dr. Takashi Yabe of the Tokyo Institute of Technology. Citation: Magnesium: Alternative Power Source (2010, April 23) retrieved 18 August 2019 from https://phys.org/news/2010-04-magnesium-alternative-power-source.html Magnesium is abundant in the world; however the production of magnesium is neither cheap or clean. There are various ways of extracting magnesium, ranging from an electrolytic process to high temperature method called the Pidgeon process.Dr. Yabe has devised a high temperature solution by concentrating solar collectors and a solar-pump laser to reach a temperature of 3,700 degrees centigrade. This high heat method is used to burn magnesium oxide extracted from seawater. The solar-pumped laser is necessary to help obtain this high temperature because concentrated solar energy alone would not be enough to generate 3,700 degrees C. Engineers at MagPower have developed a metal-air cell that uses water and ambient air to react with a magnesium anode, to generate electricity. A magnesium based version of the lithium-ion rechargeable cell has been created by Dr. Doron Aurbach at Bar-Ilan University in Israel. © 2010 PhysOrg.com
© 2010 PhysOrg.com Citation: Predator-prey role reversal as bug eats turtle (2011, May 27) retrieved 18 August 2019 from https://phys.org/news/2011-05-predator-prey-role-reversal-bug-turtle.html Image credit: Shin-ya OHBA In a recent journal published in Entomological Science, Dr. Shin-ya Ohba shares the unusual behavior and role reversal of a giant water bug becoming the predator and eating a juvenile turtle in a ditch in central Japan. While this Kirkaldyia deyrolli, or giant water bug, from the Lethocerinae family has been seen preying on small vertebrates such as frogs and fish, Ohba has captured images of the bug eating small turtles and snakes. The K. Deyrolli is a native bug from Japan and is listed by the Japanese Environment Agency as an endangered species. They live primarily in the rice fields throughout Japan and feed on small frogs and fish. These bugs can grow up to 15cm long and inflict a venomous bite. They have been known to occasionally bite humans, causing a burning pain that lasts for several hours.Ohba was conducting a night sampling in the central Japan region of western Hyogo when he recorded images of the giant water bug feeding on a small Reeve’s pond turtle. The insect used its front legs to hold on to the turtle while it inserted its rostrum into the prey in order to feed. While the bugs are known for only attacking moving prey, Ohba assumes that the bug caught and killed the turtle before he stumbled upon it. More information: Field observation of predation on a turtle by a giant water bug, Entomological Science, DOI: 10.1111/j.1479-8298.2011.00450.xAbstractThe giant water bug, subfamily Lethocerinae, which has the largest body size among Belostomatidae, is known to be a vertebrate specialist that preys upon fish, amphibians and snakes. However, there have been no reports concerning predation on a turtle by Lethocerinae. Here, I report that a male giant water bug Kirkaldyia (Lethocerus) deyrolli (Heteroptera: Belostomatidae) (58.09 mm in total length) was catching hold of a turtle Chinemys reevesii (34.14 mm in carapace length) in a ditch adjoining a paddy rice field. This is a first report of K. deyrolli eating a turtle.via BBC Explore further Month of ActiveX Bugs (MoAxB) This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
Da Vinci’s mural was believed to have been painted on a wall in what is known as the Hall of Five Hundred, in Florence, Italy, a local government headquarters. The work was subsequently covered or destroyed when a later regime came into office and commissioned artist Giorgio Vasari to create a fresco to replace Da Vinci’s work. But Maurizio Seracini, a professor from the University of California, doesn’t think Vasari ruined Da Vinci’s mural. Instead, after extensive research, he’s come to believe a wall was built directly in front of the wall that had the Battle of Anghiari on it, with some space between it to keep it from harm. Unfortunately however, there has been no way to prove it.In a fortuitous turn of events, Seracini happened to meet photographer David Yoder, who just happened to shoot for major publications such as the New York Times, and more importantly, National Geographic Magazine (who is now helping fund the project). After working together on ideas for ways to find out once and for all if Da Vinci’s mural was indeed where Seracini thought it was, Yoder met up with the third party to their consortium; Dr. Robert Smither, a physicist with Argonne National Laboratory, who has been working on a kind of gamma ray camera to be used for creating images of tumors in cancer patients. He thought the same technology might be used to create an actual image of the mural behind the wall, if it was indeed there.The camera, if it can be built, must be portable so it can be transported to the site, and once there would work by sending neutrons through the first wall which would then hit the metals contained in the oil based paint that Da Vinci is believed to have used, on the wall behind. Those metals would then emit gamma rays which could be captured using copper crystals to form an image. Thus, the “camera” would not actually have a glass lens at all. In testing done at an Italian research center, it appears the technology would work as predicted, but, there’s still one more problem, the lack of funds, hence the posting on Kickstarter. So far the team has collected $21,514 of the $265,000 needed with just 33 days to go. © 2011 PhysOrg.com (PhysOrg.com) — A trio of players now invested in not only finding out if Leonardo Da Vinci’s famous lost mural “Battle of Anghiari” is where they think it is, but also in trying to take a picture of it, has posted a project on KickStarter asking for contributions to help in the effort. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Study: Mona Lisa neither man nor da Vinci Citation: Team seeks to finally solve mystery of Da Vinci mural hidden behind wall using gamma ray camera (2011, September 7) retrieved 18 August 2019 from https://phys.org/news/2011-09-team-mystery-da-vinci-mural.html Explore further
Citation: RAPIRO wants to spread joy of robots with Raspberry Pi (2013, June 25) retrieved 18 August 2019 from https://phys.org/news/2013-06-rapiro-joy-robots-raspberry-pi.html More information: www.rapiro.com/ This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. “If we are successful in our Kickstarter, we will publish 3-D data (.stl) on our website, allowing you to customize the RAPIRO with a 3D printer,” according to the campaign page.Kits available on Kickstarter do not come with a Raspberry Pi and camera module. © 2013 Phys.org RAPIRO: Mounting of a Raspberry Pi camera module As for progress, the campaign has taken in more donations than its original £20,000 goal. The initial offer of a full kit at £199 was already snapped up. The offer was for a full kit with estimated delivery date of December; prices after that start at £229, up to £5,000 for a custom-designed RAPIRO, where the shape would be 3-D printed especially for the pledger. At the time of this writing, the campaign has taken in £31,002 with 178 backers. (Phys.org) —The Raspberry Pi is a computing milestone as a very low-priced computing device running Linux; now a Japanese inventor wants to rev up another kind of breakthrough, with an affordable robot kit that can work with the Raspberry Pi and its camera module. Say hello to RAPIRO, as its makers say, “the robot you always wanted as a kid,” and, as its makers ask, pledge some money for it too, because it is a Kickstarter campaign. Charlotte robot tells the world where it’s not going Explore further The makers want to raise funds to get it off and running in full production mode. RAPIRO is billed as an affordable and easy to assemble humanoid robot kit. This comes with 12 servo motors and an Arduino-compatible servo control board. RAPIRO was designed to mount with the Raspberry Pi and camera module in the head. Taking its selling points one by one, the question is, how affordable? The makers claim the kit is 1/10th the price of current Linux-powered humanoid robot kits.Next, the RAPIRO robot is billed as cute. How cute? Its 12 servo motors are for the neck, waist, feet, and arms. RAPIRO can grip a pen, and can turn its head and waist. Then there are RAPIRO’s LED eyes, lit brightly by RGB LEDs. Next, the claim is that it is easy to put together. How easy? Assembling RAPIRO just takes a screwdriver. No soldering is involved.The developer behind RAPIRO is Shota Ishiwatari of Kiluck Corp. in collaboration with three other small companies in Japan. Ishiwatari designed RAPIRO with 3-D CAD, built circuits, and wrote the code. Now he and colleagues are in promotion mode. They want to start a robot revolution, in the spirit of Raspberry Pi, where the robots can not only be enjoyed as cute but also eventually customizable and programmable.
© 2013 Phys.org. All rights reserved. Explore further This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. The fluorescent future of solar cells (Phys.org) —In the world of organic solar cells, polymer-based devices may currently be at the top, but other organic materials such as “small molecules” also prove to be promising. Although small-molecule organic solar cells currently have lower efficiencies than polymer solar cells, they are generally easier to fabricate and their efficiencies are improving. More information: Aung Ko Ko Kyaw, et al. “Improved Light Harvesting and Improved Efficiency by Insertion of an Optical Spacer (ZnO) in Solution-Processed Small-Molecule Solar Cells.” Nano Letters. DOI: 10.1021/nl401758g In a new study, researchers have shown that they can increase the efficiency of one type of small-molecule organic solar cell from 6.02% to 8.94% simply by tuning the thickness of the active layer and inserting an optical spacer between the active layer and an electrode. The efficiency improvement demonstrates that small-molecule solar cells have the potential to compete with their polymer counterparts, which have efficiencies approaching 10%.The researchers, led by Alan J. Heeger at the University of California at Santa Barbara, have published their paper on the efficiency improvement in small-molecule solar cells in a recent issue of Nano Letters.As the scientists explain in their paper, small-molecule organic solar cells have several advantages over organic polymer solar cells: relatively simple synthesis, high charge carrier mobility, similarly sized particles (monodispersity), and better reproducibility, among others. However, small-molecule solar cells have so far achieved top efficiencies of about 8%, lagging somewhat behind the best polymer devices.By demonstrating how a few simple changes can increase the efficiency of one type of small-molecule organic solar cell by nearly 50%, the scientists here have shown that these devices still have the potential for vast improvements. Tuning the thickness of the active layer and inserting a zinc oxide optical spacer between the active layer and metal electrode enable the active layer to harvest more light, increasing optical absorption. The insertion of the optical spacer places the active layer in a more favorable position within the optical electric field within the cell. As the scientists explained, the optical spacer contributes to increased light absorption in three ways: increasing the charge collection efficiency, serving as a blocking layer for holes, and reducing the recombination rate. Journal information: Nano Letters Citation: Small-molecule solar cells get 50% increase in efficiency with optical spacer (2013, August 14) retrieved 18 August 2019 from https://phys.org/news/2013-08-small-molecule-solar-cells-efficiency-optical.html (Left) A ZnO optical spacer viewed under an atomic force microscope. (Center) The device structure of the small-molecule solar cell. (Right) Solar cell performance with and without an optical spacer. Credit: Aung Ko Ko Kyaw, et al. ©2013 American Chemical Society
Citation: Study suggests a big increase in Arctic precipitation over the coming century, much of it rain (2017, March 16) retrieved 18 August 2019 from https://phys.org/news/2017-03-big-arctic-precipitation-century.html Journal information: Nature Climate Change © 2017 Phys.org Mosaic of images of the Arctic by MODIS. Credit: NASA Humans to blame for bulk of Arctic sea ice loss: study Explore further (Phys.org)—A pair of researchers with the University of Groningen in the Netherlands has found via climate modeling that it appears likely that the Arctic is likely to see substantially more precipitation over the next century, much of it in the form of rain. In their paper published in the journal Nature Climate Change, Richard Bintanja and Olivier Andry describe their results when running 37 climate models programed to describe Arctic conditions over the years 2091 to 2100. More information: R. Bintanja et al. Towards a rain-dominated Arctic, Nature Climate Change (2017). DOI: 10.1038/nclimate3240AbstractClimate models project a strong increase in Arctic precipitation over the coming century, which has been attributed primarily to enhanced surface evaporation associated with sea-ice retreat. Since the Arctic is still quite cold, especially in winter, it is often (implicitly) assumed that the additional precipitation will fall mostly as snow. However, little is known about future changes in the distributions of rainfall and snowfall in the Arctic. Here we use 37 state-of-the-art climate models in standardized twenty-first-century (2006–2100) simulations to show a decrease in average annual Arctic snowfall (70°–90° N), despite the strong precipitation increase. Rain is projected to become the dominant form of precipitation in the Arctic region (2091–2100), as atmospheric warming causes a greater fraction of snowfall to melt before it reaches the surface, in particular over the North Atlantic and the Barents Sea. The reduction in Arctic snowfall is most pronounced during summer and autumn when temperatures are close to the melting point, but also winter rainfall is found to intensify considerably. Projected (seasonal) trends in rainfall and snowfall will heavily impact Arctic hydrology (for example, river discharge, permafrost melt), climatology (for example, snow, sea-ice albedo and melt)8, 9 and ecology (for example, water and food availability). Over the past several years, climate scientists have been running various models in different ways trying to understand why Arctic sea ice continues to melt faster than models predict. In this new effort, the researchers took a closer look at the impact caused by changes in the amount of precipitation. They combined data from a variety of sources and used it to run 37 climate models, finding that the Arctic is likely to see an increase in precipitation by as much as 4 percent, which is double that for the rest of the planet. They note that retreating ice leaves more open water, which leads to more evaporation and more snow and rainfall. The models suggested the rainy season in the Arctic will likely last longer in the future and reach farther north. They also theorize that sometime in the next century, it will be possible to navigate a ship to the North Pole because all of the sea ice will be gone.In another study, an international team of researchers ran models of their own and concluded that almost half of the ice that has melted in the Arctic over the past century and a half may be attributed to natural changes such as variations in wind and water currents. They have also published their results in Nature Climate Change. They suggest that the reason so many climate models have failed to accurately predict how much ice would melt in the Arctic and when is because they fail to account for natural climate variations. They believe the Arctic is currently experiencing a natural warm spell, which, when combined with human-caused global warming, is causing ice to melt at very fast rate. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
As archaeologists continue to piece together human history, they look for new ways to interpret evidence that may already be in hand—such as ancient human bones or fossils. By studying the way the skeleton has changed from the time when our ancestors were in Africa until today, researchers have created a kind of map of the migration of humans around the world. In this new effort, the researchers focused on the bony labyrinth, the three bones of the inner ear—the cochlea, vestibule and semicircular canals. Together, they appear as a sort of labyrinth for which they were named. The researchers started with the knowledge that as time passes, bone structure tends to change—and the bony labyrinth has proven to be particularly hardy, remaining mostly intact in skeletons when arms, legs and other bones have been broken, crushed or lost completely. They further noted that earliest humans that migrated from Africa would have had the longest amount of time to evolve as they moved to other places. And those that migrated the farthest would likely be among those who migrated the earliest. This, they believed, suggests it should be possible to use evolutionary changes in the bony labyrinth as a means for charting human migration.To test their theory, the researchers collected and analyzed 221 skulls, which included 22 unique populations from various time periods. They looked at the differences in the bony labyrinths, and once they had been identified, the researchers compared the differences they found with data from other studies attempting to create migration maps.The team reports that their original idea aligned with their research data—those humans with the greatest amount of change in their inner ear bones were among the group that left Africa the earliest and traveled the farthest, demonstrating that the bony labyrinth could, indeed, be used as a new tool to help in adding pieces to the puzzle of human history. An international team of researchers has found that it is possible to use the human bony labyrinth of the ear as an indicator of dispersal from Africa. In their paper published in Proceedings of the National Academy of Sciences, the group describes their study of hundreds of ancient ear bones from around the world and the differences they found among them. Citation: Human bony labyrinth used as an indicator of dispersal from Africa (2018, April 3) retrieved 18 August 2019 from https://phys.org/news/2018-04-human-bony-labyrinth-indicator-dispersal.html Journal information: Proceedings of the National Academy of Sciences Scientists discover oldest known modern human fossil outside of Africa More information: Marcia S. Ponce de León et al. Human bony labyrinth is an indicator of population history and dispersal from Africa, Proceedings of the National Academy of Sciences (2018). DOI: 10.1073/pnas.1717873115AbstractThe dispersal of modern humans from Africa is now well documented with genetic data that track population history, as well as gene flow between populations. Phenetic skeletal data, such as cranial and pelvic morphologies, also exhibit a dispersal-from-Africa signal, which, however, tends to be blurred by the effects of local adaptation and in vivo phenotypic plasticity, and that is often deteriorated by postmortem damage to skeletal remains. These complexities raise the question of which skeletal structures most effectively track neutral population history. The cavity system of the inner ear (the so-called bony labyrinth) is a good candidate structure for such analyses. It is already fully formed by birth, which minimizes postnatal phenotypic plasticity, and it is generally well preserved in archaeological samples. Here we use morphometric data of the bony labyrinth to show that it is a surprisingly good marker of the global dispersal of modern humans from Africa. Labyrinthine morphology tracks genetic distances and geography in accordance with an isolation-by-distance model with dispersal from Africa. Our data further indicate that the neutral-like pattern of variation is compatible with stabilizing selection on labyrinth morphology. Given the increasingly important role of the petrous bone for ancient DNA recovery from archaeological specimens, we encourage researchers to acquire 3D morphological data of the inner ear structures before any invasive sampling. Such data will constitute an important archive of phenotypic variation in present and past populations, and will permit individual-based genotype–phenotype comparisons. © 2018 Phys.org Explore further The inner ear of modern humans shows subtle shape differences between populations, tracking human dispersal from Africa (colors symbolize dispersal distance from sub-Saharan Africa). Credit: PNAS This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
© 2018 Phys.org Citation: Smart window controls light and heat, kills microorganisms (2018, July 13) retrieved 18 August 2019 from https://phys.org/news/2018-07-smart-window-microorganisms.html The researchers, led by Yan-Yan Song at Northeastern University in Shenyang, China, and Xing-Hua Xia at Nanjing University in Nanjing, China, have published a paper on the new sterile smart window in a recent issue of ACS Nano.As the researchers explain, integrating multiple functions into a single smart window presents a challenge, since each function typically requires a different material composition. For example, one of the most widely used materials for smart windows that control visible light transmission is WO3 (tungsten trioxide). As an electrochromic material, WO3 can reversibly change its optical transmittance in response to electrochemical charging and discharging. On the other hand, smart windows that convert near-infrared solar radiation into heat typically involve metal nanoparticles. Also, a wide range of materials have antimicrobial properties, most notably copper. So far, however, combining all of these properties into one material has remained a challenge.In the new study, the researchers designed an electrochromic-photothermal film composed of 3D WO3 in a honeycomb-like structure embedded with gold nanoparticles and nanorods. While the WO3 controls the amount of visible light that passes through the window, the gold nanostructures convert incoming sunlight into thermal energy for heating the building interior. “This is a new strategy that achieves excellent photothermal conversion via solar gain optimization on electrochromic films and, importantly, the photothermal efficiency is adjustable during optical transmission,” Xia told Phys.org.The researchers demonstrated that the window can change from fully transparent to pitch black within minutes. Further, they showed that a near-infrared laser increases the temperature of the window by 24 °C in about five minutes. To investigate the antimicrobial properties of the window, the researchers treated it with E. coli and irradiated it with a near-infrared laser. They found that the bactericidal effect was strongest when the window was in its dark state, in which it could eliminate virtually all of the bacteria. In contrast, the effect was much weaker for windows in the transparent state, as well as those made of only WO3 or only gold nanostructures, rather than both materials combined. The results suggest that most of the bactericidal effects are due to the photothermal properties of the window.”The sterile smart window would be particularly useful in aircraft, in high-latitude zones, and also in hospitals,” Xia said. “It should be multifunctional, for example, controlling visible light transmission dynamically, tuning heat conversion of near-infrared solar radiation, and reducing attacks by microorganisms.” Journal information: ACS Nano Material could help windows both power your home and control its temperature A new smart window offers more than just a nice view—it also controls the transmittance of sunlight, heats the interiors of buildings by converting solar radiation into heat, and virtually eliminates E. coli bacteria living on the glass. In the future, such sterile smart windows may be used in airplanes, hospitals, public transportation, and other areas. Photographs showing one of the three properties of the sterile smart window: control of visible light transmission. Credit: Xu et al. ©2018 American Chemical Society Explore further More information: Jingwen Xu et al. “Electrochromic-Tuned Plasmonics for Photothermal Sterile Window.” ACS Nano. DOI: 10.1021/acsnano.8b02292 This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
The current exhibition of the works of artist Pankaj Kumar Singh is a cumulative display of the artist’s current muse. The event is a follow-up of his earlier shows at prestigious galleries over the last two years.The works on display express a collective representation of perceptions gleaned from geometric forms, particularly the circle, with an inner eye-like centre point. Though reminiscent of a suggestive geometry, the works are fused into a pleasing palette of colours, which are blended loosely across the space and then concentrated with a hint of graphic outlines, thereby exuding a calming effect on the sensibilities. Also Read – ‘Playing Jojo was emotionally exhausting’There is a narrative playfulness behind the forms, allowing the mind of the viewers to go into expansionist thinking mode, where the ideas for the narrative are the input of each individual viewer. The works therefore establish a platform for sharing a conversation between the viewers and the artist, through the works on display.An alumni of the Benaras Hindu University, Pankaj Kumar Singh has been an awarded the prestigious AIFACS Cash Award for upcoming artists. He has been a National Scholarship winner of the Government of India and has also been an active participant at alumni shows such as the Annual Art exhibition of the Faculty of Fine Arts at BHU. Also Read – Leslie doing new comedy special with NetflixHis works have been displayed by the Kerala Lalith Kala Academy and the State Lalit Kala Academy, Lucknow. An insightful and strategic messaging angle through art was created when he visualised a telling poster for 21st century women’s issues, and for eye donations, among others, initiated by BHU. Exhibitions of his works have been held at prominent art galleries in Delhi and Kolkata. The artist currently lives and works in Delhi. WHERE: Dhoomimal Art Centre, A8 – Connaught Place, Level I & II, Inner CircleWHEN: On till 15 October, 11 – 7 pm
Kolkata: The West Bengal BJP today organised a sit-in demonstration here in protest against the continuing violence over filing of nomination for the panchayat polls.The party also demanded adequate deployment of central paramilitary forces for free and fair panchayat polls.Senior BJP leader Mukul Roy and BJP national secretary Rahul Sinha along with other party leaders organised the sit in demonstration in front of Mahatma Gandhi’s statue at Mayo Road area in the city. Also Read – Heavy rain hits traffic, flights”The Trinamool Congress has turned the panchayat elections into a farce in the state. The TMC is not allowing others to file nominations,” Roy said.The entire state is bleeding and both the State Election Commission (SEC) and the police administration are mute spectators. The police is acting like cadres of the TMC, Roy said.During the demonstration, BJP activists were carrying placards against the state government condemning the violence.Roy urged the workers of the opposition CPI(M) and the Congress to leave their party and join the BJP if they are serious about fighting against the alleged misrule of the TMC. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killed”Both the Congress and the CPI(M) are spent forces in Bengal. They don’t have the strength to fight against the TMC’s misrule. The workers of BJP and CPI(M) should join the BJP if they are serious about fighting TMC,” Roy said.While addressing the agitation programme, Rahul Sinha said the BJP won’t leave a single inch to the TMC without putting up a fight.The protest comes in the backdrop of widespread violence across the state over filing of nominations. There have been several incidents of clashes between the BJP and the TMC supporters in various parts of the state. A state BJP delegation will today meet the SEC to complain about the ongoing violence in the state, party sources said.TMC secretary general Partha Chatterjee dubbed the allegations as baseless.”The BJP is trying to disturb the peace and stability of the state by flaring up communal violence and bringing in outsiders to create trouble during the panchayat polls,” Chatterjee said.Panchayat polls will be held in the state in the first week of May.