Common aquatic animals show resistance to radiation

first_imgScientists at Harvard University have found that a common class of freshwater invertebrate animals called bdelloid rotifers are extraordinarily resistant to ionizing radiation, surviving and continuing to reproduce after doses of gamma radiation much greater than that tolerated by any other animal species studied to date.Because free radicals such as those generated by radiation have been implicated in inflammation, cancer, and aging in higher organisms, the findings — published this week in the Proceedings of the National Academy of Sciences by Harvard’s Matthew Meselson and graduate student Eugene Gladyshev — could stimulate new lines of research into these medically important problems.“Bdelloid rotifers are far more resistant to ionizing radiation than any of the hundreds of other animal species for which radiation resistance has been examined,” says Meselson, Thomas Dudley Cabot Professor of the Natural Sciences in Harvard’s Faculty of Arts and Sciences. “They are able to recover and resume normal reproduction after receiving a dose of radiation that shatters their genomes, causing hundreds of DNA double-strand breaks which they are nevertheless able to repair.”Meselson and Gladyshev found that the bdelloid rotifers Adineta vaga and Philodina roseola remained reproductively viable after doses of radiation roughly five times greater than other classes of rotifers and other animals could endure.Such radiation resistance appears not to be the result of any special protection of DNA itself against breakage, the researchers say, but instead reflects bdelloid rotifers’ extraordinary ability to protect their DNA-repairing machinery from radiation damage.Roughly a half-millimeter in size and commonly observed under microscopes in high school biology classes, bdelloid rotifers are highly unusual in several regards: They appear to be exclusively asexual, have relatively few transposable genes, and can survive and reproduce after complete desiccation at any stage of their life cycle. Meselson and Gladyshev hypothesize that it’s this last property that explains bdelloids’ apparently unique resistance to radiation.Bdelloid rotifers have been widely studied since at least 1702, when the renowned Dutch scientist and microscopy pioneer Anton van Leeuwenhoek added water to dust retrieved from a rain gutter on his house and observed the organisms in the resulting fluid. He subsequently described the creatures in a letter to Britain’s Royal Society, which still counts an envelope of van Leeuwenhoek’s rain-gutter dust among its holdings.Meselson and Gladyshev’s work is supported by the National Science Foundation’s Eukaryotic Genetics [email protected]last_img read more

BigLift handles jack-up move

first_imgThe jack-up platform, which had an overall breadth of 75 m and legs measuring 133 m tall, was loaded onto the vessel’s 125 m x 42 m flush deck.With a short lead-time – only three weeks between signing the contract and starting the loading operations – all design and engineering, procurement and construction was completed by the in-house project team.For load spreading purposes, 60 cu m of timber used for cribbing was positioned on the deck of BigLift Barentsz.As the platform waited in the water at the port of Flushing, BigLift Barentsz was partly submerged slowly. Once the vessel had been lined up with the frames of the jack-up platform, the vessel was positioned underneath the structure for it be lowered and secured on the deck.Both the loading and discharge operations were completed in one day.www.bigliftshipping.comlast_img read more

Wellington Police Labor Day weekend report: Friday, Aug. 30 – Monday, Sept. 2, 2019

first_imgWellington Police Labor Day weekend report for Friday, Aug 30 to Monday, Sept. 2, 2019: Friday, August 30, 2019•Adrian C Rosewicz, 31, Wellington was issued a notice to appear for failure to report an injury accident. It occurred on July 28, 2019.) •10:40 a.m. Joseph C. Rachal Jr., 44, Aberdeen, S.D. was issued a notice to appear for passing in a no Passing Zone.•11:12 a.m. Officers responded to an animal complaint in the 700 block W. 4th, Wellington.•11:52 a.m. Officers responded to children in need of care in the 1200 block S. Jefferson, Wellington.•12:02 p.m. Sarah I. Treft, 27, Wellington was issued a notice to appear for noisy dog.•8:24 p.m. Officers investigated theft in the 1400 block E. 16th, Wellington.•8:43 p.m. Kimberly K. Pritchard, 51, Wellington was issued a notice to appear for an improper turn and expired drivers’ license. •10 p.m. Brodrick G. Henton, 24, Wellington was issued a notice to appear for defective tag light. •10:04 p.m. Matthew K. Malone, 42, Augusta, was issued a notice to appear for turn signal violation. •10:05 p.m. Blas O. Ibarra, 28, Arkansas City, Ks was issued a notice to appear for defective headlamp.•10:20 p.m. Rami N. Mir, 35, Houston, Texas was issued a notice to appear for speeding 45 mph in a 35 mph zone. •10:25 p.m. Richard N. McCulley, 46, Enid, Okla. was issued a notice to appear for speeding 59 mph in a 45 mph zone.•10:25 p.m. Stanton E. Palmer, 48, Wellington was issued a notice to appear for defective tag light. •10:40 p.m. Phillip P. Dominquez, 25, Denton, Texas was issued a notice to appear for speeding 58 mph in a 45 mph zone. •10:51 p.m. Adam J. Edgerton, 35, Wellington was issued a notice to appear for a defective tail lamp.•11:05 p.m. Patrick S. Grable, 41, Wellington was issued a notice to appear for a defective tail lamp.•11:09 p.m. Keaton H. Jackson, 21, Englewood, Colo. was issued a notice to appear for speeding 55 mph in a 40 mph zone and possession of marijuana.•11:47 p.m. Stacy J. Bright, 49, Wellington was issued a notice to appear for failure to signal.Saturday, August 31, 2019•12:47 a.m. Melissa B. Davis, 46, Longview, Texas was issued a notice to appear for a defective headlamp. •10:13 a.m. Alberto Gonzalez, 38, Shawnee, Okla. was issued a notice to appear for speeding 54 mph in a 30 mph zone.•1:58 p.m. Michael A. Steele, 35, Wellington was arrested for a parole violation.•2:08 p.m. Officers investigated domestic battery in the 1300 block E. Michigan Ct., Wellington. •7:54 p.m. Krista L. Wells, 40, Wellington was arrested, charged and bonded with criminal damage to property in the 200 block N. Elm, Wellington.•11:26 p.m. Officers investigated minors in consumption of alcohol of known suspects in the 400 block Terrace Dr., Wellington.•11:42 a.m. Officers investigated a theft in the 1200 block S. G, Wellington.•12:29 p.m. Officers responded to a juvenile problem in the 1000 block E. 16th, Wellington. •1 p.m. Officers took a found property report in the 400 block N. Terrace Dr., Wellington.•6:16 p.m. Officers responded to a mental subject in the 900 block E. Lincoln, Wellington. •7:49 p.m. Officers took a suspicious activity report in the 1900 block N. A, Wellington.Sunday, September 1, 2019•11:42 a.m. Officers investigated a theft in the 1200 block S. G, Wellington.•12:29 p.m. Officers responded to a juvenile problem in the 1000 block E. 16th, Wellington.•1 p.m. Officers took a found property report in the 400 block N. Terrace Dr., Wellington.•6:16 p.m. Officers responded to a mental subject in the 900 block E. Lincoln, Wellington. •7:49 p.m. Officers took a suspicious activity report in the 1900 block N. A, Wellington.Monday, September 2, 2019•Saturday, August 31, 11:20 p.m. Officers investigated unlawfully hosting minors consuming alcohol. •12:21 p.m. Officers took a suspicious activity report in the 1000 block Mission Rd., Wellington. •2 p.m. Austin M. Harriger, Wellington was issued a notice to appear for speeding 40 mph in a 30 mph zone.•2:15 p.m. Walter P. Handloser, III, 37, San Luis Obispo, Calif. was issued a notice to appear for speeding 43 mph in a 30 mph zone. •8:47 p.m. Officers responded to a suicide threat in the 700 block N. Olive, Wellington.last_img read more