Sumatra earthquake mysteries examined

center_img Citation: Sumatra earthquake mysteries examined (2012, May 11) retrieved 18 August 2019 from https://phys.org/news/2012-05-sumatra-earthquake-mysteries.html More information: A Rogue Earthquake Off Sumatra, Science DOI: 10.1126/science.1223983AbstractA magnitude 8.6 strike-slip earthquake within an oceanic plate raises fundamental questions about earthquake physics. © 2012 Phys.Org Journal information: Sciencelast_img

Honeybee secretion may find use as local anesthetic

first_img Explore further (Phys.org)—Bees can bite. Biologists from universities in Greece and France have discovered that, besides a tail sting, the honeybee is capable of packing a paralyzing bite. The bee uses its bite weapon on targets too small to be stung, such as wax moth larva and varroa mites. The intruders can infiltrate beehives and eat wax and pollen. The bee delivers a bite that can paralyze them for up to nine minutes, enough time for them to be ejected from the hive. The honeybee uses its mandibles to bite its enemy and then secretes 2-heptanone into the wound. In their paper, the authors explain that this defense weapon is produced in the mandibular glands, released by the mandible pore of a reservoir and through the groove flows at the sharp edge of mandibles. Journal information: PLoS ONE Honeybees entomb to protect from pesticides Citation: Honeybee secretion may find use as local anesthetic (2012, October 29) retrieved 18 August 2019 from https://phys.org/news/2012-10-honeybee-secretion-local-anesthetic.html “We believe, based on our morphological studies and the anatomical evidence provided by others, that the release of 2-H is not passive, but actively controlled by the contraction of mandibular muscles.”The “2-H” they refer to, 2-heptanone, is already known to biologists as a natural compound found in some foods, including beer and white bread, and is secreted by some insects. Biologists assumed, though, that the 2-H function is an alarm pheromone, chemically tagging areas for bees to revisit or calling on other bees to attack intruders.Alexandros Papachristoforou, at the Aristotle University of Thessaloniki, Greece, and others in the research team, discovered otherwise. He said he believed beekeepers will be surprised by the discovery, as it is “likely to cause a radical rethink of some long-held beliefs.” As important, he said that the discovery will probably send honeybee research off in new directions. A key suggestion from their study is that the 2-H from the honeybee may find use as a local anesthetic in both human and veterinary medicine. Certainly the findings are of interest to UK-based Vita (Europe), a honeybee supplier of honeybee health products, with offices in Italy, France and Russia. The research was funded by Vita, which invests a proportion of its turnover into research and development, and one of the authors works for the company.Vita earlier this month issued a story on its site noting that the discovery means that the anesthetic has great potential for use in human medicine as it could lead to the production of a natural, low toxicity, local anesthetic for humans and animals.Vita said that independent tests have verified the potential of 2-heptanone as a local anesthetic, and Vita has already patented the use of the compound for use as a local anesthetic. Other organizations that contributed to the research include the Aristotle University of Thessaloniki in Greece, the French Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud, Cyprus University of Technology, and the University of Athens.Actually, the discovery was by accident. According to Dr Papachristoforou, the principal focus of the research was not honeybees but rather wax moths and how they can be controlled. Wax moths are a serious honeybee pest. Their larvae consume wax and pollen, often destroying honeycomb. When exposed to 2-heptanone, the moths seemed to die. The researchers realized, though, that they did not die but were just anesthetized. The period ranged from one to nine minutes. That is when the scientists began to set up experiments to understand what was happening.While animal venoms are used to create a range of medicines, the researchers acknowledge that “the question here is whether 2-H can pass the preclinical and clinical tests required in order to be considered in clinical practice.” The research was published earlier this month in the peer-reviewed open access journal, PLOS ONE. © 2012 Phys.org More information: www.vita-europe.com/secrets-of … eybee-bite-revealed/www.plosone.org/article/info%3 … journal.pone.0047432 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.last_img read more

Fire alarm wallpaper detects resists and warns of house fires

first_img The researchers, led by Professor Ying-Jie Zhu at the Shanghai Institute of Ceramics, Chinese Academy of Sciences, have published a paper on the fire alarm wallpaper in a recent issue of ACS Nano.Most of today’s commercial wallpaper is made of highly flammable materials, such as plant cellulose fibers or synthetic polymers. Consequently, whenever a fire occurs, the wallpaper often causes the fire to spread. “Compared with flammable commercial wallpaper, the fire-resistant wallpaper is superior owing to its excellent nonflammability, high-temperature resistance, and automatic fire alarm function,” Zhu told Phys.org. “The fire-resistant wallpaper has a white color, mechanical robustness, and high flexibility, it can be processed into various shapes, dyed with different colors, and printed with a commercial printer. Therefore, the fire alarm fire-resistant wallpaper has promising applications in high-safety interior decoration to save human lives and reduce the loss of property in a fire disaster.”The new wallpaper is based on hydroxyapatite, which is the primary inorganic component of bone and teeth. Although hydroxyapatite is typically brittle and inflexible, in previous work the researchers found that forming ultralong nanowires made of hydroxyapatite gives the material a high flexibility suitable for making wallpaper.In order to make the nonflammable wallpaper a “smart material” capable of automatically sounding an alarm in response to a fire, the researchers incorporated an ink-based thermosensitive sensor onto the wallpaper. Journal information: ACS Nano The sensor is composed primarily of graphene oxide, which is electrically insulating at room temperature. However, when exposed to heat, the oxygen-containing groups are removed, making the material highly conductive. The sensor is connected to an alarm, so when a fire occurs and the sensor begins to conduct electricity, it causes the alarm to go off.Initially, one problem with the graphene oxide sensor was that it burned out very quickly, so that the alarm only lasted for about three seconds. To improve this, the researchers modified the graphene oxide with polydopamine—a material based on the hormone and neurotransmitter dopamine, found in living organisms. The polydopamine-modified graphene oxide has a much lower thermal responsive temperature than graphene oxide by itself, meaning that it not only responds to fire more quickly (in about two seconds), but also has a prolonged alarm time of more than five minutes.In the future, the researchers plan to scale up production of the wallpaper, as well as investigate other applications of the new fire-resistant material.”The mass production of ultralong hydroxyapatite nanowires as the raw material for the smart fire alarm fire-resistant wallpaper is critical,” Zhu said. “To date, we have realized the scaled-up production of ultralong hydroxyapatite nanowires in an autoclave with a volume of 100 liters in our laboratory. We are striving to explore the low-cost and environmentally friendly large-scale production technology for ultralong hydroxyapatite nanowires. In addition, many companies are interested in the new kind of the fire-resistant paper, and we will collaborate with some companies to realize industrial-scale production in the future. “We have also been exploring various applications of the new kind of fire-resistant paper based on ultralong hydroxyapatite nanowires in many other fields, such as preserving important paper documents, energy, air purification, water treatment, environment protection, anti-counterfeiting, flexible electronics, and biomedical uses.” PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen 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 Researchers have designed a “fire alarm wallpaper” made of environmentally friendly, nonflammable materials—including some of the materials found in bone, teeth, and hormones—that can detect a fire, prevent the fire from spreading, and give off an alarm when a fire occurs. When exposed to heat, the wallpaper is transformed from an electrically insulating state into an electrically conductive one, causing it to automatically trigger an alarm that generates loud sounds and warning lights. Controlling fire ants with natural compounds Fire-resistant wallpaper withstands flames, while a thermosensitive sensor triggers an alarm of sound and light. Credit: Chen et al. ©2018 American Chemical Society Play Credit: Chen et al. ©2018 American Chemical Society The thermosensitive sensor is fabricated on the surface of the wallpaper by a simple drop-casting process using an ink containing graphene oxide. The tiny sensor is placed on the backside of the fire- resistant wallpaper so that it is out of sight and protected by the fireproof wallpaper. Explore further Citation: Fire alarm wallpaper detects, resists, and warns of house fires (2018, March 29) retrieved 18 August 2019 from https://phys.org/news/2018-03-alarm-wallpaper-resists-house.html More information: Fei-Fei Chen et al. “Fire Alarm Wallpaper Based on Fire-Resistant Hydroxyapatite Nanowire Inorganic Paper and Graphene Oxide Thermosensitive Sensor.” ACS Nano. DOI: 10.1021/acsnano.8b00047last_img read more

Late bogeys push Lahiri down

first_imgAnirban Lahiri started out on his long journey on the PGA Tour at the Shell Houston Open in a rather humbling manner, ending the day one at two-over 74. Starting with a birdie on the 10th, his first hole of the day, the World No. 33 Lahiri parred the next seven holes to stay under-par before encountering his first disappointment in the form of a double bogey on the 17th.Thereafter two other birdies back-to-back on fifth and sixth and three bogeys, two of them in last three holes saw him finish at two-over 74 for the first day. It put the winner of Malaysian and Hero Indian Open winner way behind at 117th place three shots behind the projected cut. The leader was Scott Piercy, who blazed the course with a nine-under 63 and opened a two-shot lead over German Alex Cejka and long-hitting JB Holmes. Piercy at one stage five birdies in a row. Phil Mickelson, Luke Guthrie, Charles Howell III and Houston’s Shawn Stefani each shot a 66 and trail Piercy by three strokes. Lahiri is due to play his first Masters next week and is looking forward to a series of starts over the next few months in the US.last_img read more

Govt to rope in FRDC to develop fireworks manufacture in state

first_imgKolkata: Taking a major step to develop manufacturing of fireworks as a major industry in Bengal, the Mamata Banerjee government will rope in the Fireworks Research and Development Centre (FRDC) at Sivakasi in Tamil Nadu, to prepare a Detailed Project Report (DPR) to set up a cluster of fireworks factories at Baruipur in South 24-Parganas.According to a senior official of the Micro, Small and Medium Enterprise and Textiles department, the decision has been taken to write to the FRDC to prepare the DPR as it is an expert organisation in ensuring quality and safety standards for the entire industry. Also Read – Heavy rain hits traffic, flightsThe DPR will be prepared to set up the cluster with common facility centre at Baruipur in South 24-Parganas. Later, the same model as per the DPR will be replicated to set up such clusters in other parts of the state.It may be mentioned that Sivakasi in Tamil Nadu is known as the country’s firecrackers manufacturing hub. In Bengal, too, there are many villages, mainly in South 24-Parganas, where manufacturing firecrackers is the source of livelihood for many. Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedNow, the state government has taken the major step in helping the families involved in manufacturing of firecrackers by creating infrastruc-ture that will ensure a “better, safe and hazard-free” environment. “It is the main reason behind roping in an expert organisation like FRDC to prepare the DPR,” the official said.It may be mentioned that a 50-acre land at Baruipur in South 24-Parganas has already been identified and all other processes are also in progress to set up the cluster. Since it is a matter of setting up a cluster of fireworks manufacturing factories, the official said that it will be set up adhering to all norms. Setting up of the same will ensure technological upgradation, which will ensure improvement in the quality of work. Moreover, workers can work without even apprehending any health hazards. There will also be a centre for testing of raw materials for quality control and at the same time, there will also be standardisation of work.Citing an example, the official said that there has to be two separate entry and exit points of each of the units that will be developed at the cluster and as per the norms, those have to be at proper positions. Moreover, the warehouses where the “highly inflammable” materials will be stored, will also have to be planned properly. “So, the planning before initiating the work has to be foolproof,” the official added. The officials of the department will be contacting the FRDC authorities soon.last_img read more

Tender of the wonder

first_imgWhat would have been the fate of Shahjahan’s Taj Mahal had the emperor lived in the present times? Taj Mahal Ka Tender,  a play that was staged at Sri Ram Centre yesterday narrated how, if the Taj  Mahal were to be built today, the bureaucratic machinery would never let it build. The play written by Ajay Shukla and directed by SP Singh Senger is a hilarious burlesque. It also looks at how corruption at every level of governance would make it difficult, even impossible, to execute something of this kind.  Also Read – ‘Playing Jojo was emotionally exhausting’The persistent Shahjahan, in no mood to accept excuses for delays, and sends the somnolent Government construction department into tizzy. The engineers and overseers get down to business to fulfill emperors wish, as if they really could. An outbreak of activities ensues but in a typical sarkari manner. Tenders are issued. Contractors are hired. But, does the project see light of the day? Or, does the mogul emperor, fast forwarded in time, become a victim of the system himself? Whatever may happen to the wonder tomb, but it was a lofty laughter castles as the curtains came down of  Taj Mahal ka Tender.last_img read more

Lalus trusted IAS officers placed in sons depts

first_imgRashtriya Janata Dal  (RJD) president Lalu Prasad Yadav’s two of the most trusted senior IAS officers have been moved into departments held by the party patron’s sons in the Bihar cabinet.1982-batch IAS officer Sudhir Kumar, who was with Lalu Prasad during his tenure as Railway minister, has been made Principal Secretary Road Construction Department under charge of Deputy Chief Minister Tejaswi Yadav, a government notification issued last night said. Also Read – Punjab on alert after release of excess water from Bhakra damA 1987-batch IAS officer RK Mahajan has been moved from Education department and made Principal Secretary of Health held by Lalu Prasad’s another son Tej Pratap Yadav.Mahajan had served as Executive Director, Public Grievances, Minister of Railways when Lalu Prasad was in Rail Bhawan during UPA I.The Nitish Kumar government effected the changes in senior levels of the bureaucracy last night to further tone up administration.The new post of Sudhir Kumar, who is waiting for the posting, has been upgraded to the rank of Chief Secretary from the day of his joining, the notification said. He replaces Arun Kumar Singh in RCD, who has been moved to Water Resources department. Also Read – Union Min doubts ‘vote count’ in Bareilly, seeks probeMeanwhile, Vijay Prakash, Commissioner of Agriculture Production has been given additional charge of Vigilance department. DS Gangwar, Principal Secretary to CM has been transferred to Education department. He would continue to hold responsibility as Principal Secretary to the CM as well Resident Commissioner of Bihar at Delhi.Brajesh Mehrotra (89 batch IAS) has been transfered from Health department to Cabinet Coordination department.last_img read more