Hairy limbs keep bed bugs at bay

first_img Tweet 21 Views   no discussions Share Share Sharecenter_img HealthLifestyle Hairy limbs keep bed bugs at bay by: – December 15, 2011 Sharing is caring! The bed bug feeds on bloodHairier skin may be the key to avoiding being bitten by bed bugs, claim Sheffield academics.Hungry bugs placed on shaved arms were more likely to try to feed compared with those on unshaved arms, the journal Biology Letters reported.Researchers say the hair slows down the bed bugs and warns the victim.Pest controllers say the UK is currently experiencing a steep rise in the number of bed bug infestations.Prof Michael Siva-Jothy, from Sheffield University’s Department of Animal and Plant Sciences, recruited 29 brave volunteers to test the theory further, watching the bedbugs as they found a place to feed and removing them only as they were about to bite.He found that more layers of both longer visible hairs and finer, “vellus” hairs near the surface appeared to work as a deterrent to the insects, with the finer hairs also acting as an early warning system.Prof Siva-Jothy said: “Our findings show that more body hairs mean better detection of parasites – the hairs have nerves attached to them and provide us with the ability to detect displacement.”He said they also slowed down the insect as it searched for a tasty spot to bite.“The results have implications for understanding why we look the way we do, what selective forces might have driven us to look the way we do, and may even provide insight for better understanding of how to reduce biting insects’ impact on humans.”However, even though men are naturally hairier than women, they do not appear to be bitten less often.Professor Siva-Jothy suggested this pointed to an evolutionary battle between bed bugs and their prey, with the insects adapting to automatically head for relatively hairless bits of the body, such as wrists and ankles.He added that extreme hairiness might also be more of a disadvantage than an advantage.“If you have a heavy coat of long thick hairs it is easier for parasites to hide, even if you can detect them.“Our proposal is that we retain the fine covering because it aids detection and if we lost all hair, even the relatively invisible fine hair, our detection ability goes right down.”Evolutionary pressureThis tallies with other studies which look at how humans came to be relatively less hairy than apes.Other scientists have suggested that swapping thicker fur for clothes was a way of making insect bites and parasitic infestations less likely.Prof Mark Pagel, an evolutionary biologist at the University of Reading, said that biting parasites remain a major cause of disease and death worldwide, making them a potentially enormous evolutionary pressure on early man.He said: “This vellus hair is certainly no use for anything else, so it is a reasonable hypothesis that it developed in response to a strong selective pressure in our past.“Mammals are unique in developing this wonderful fur, and humans are the only mammals to jettison it, so there must have been a very good reason to do so.”BBC Newslast_img read more

Chelsea to decide whether to appeal Diego Costa violent conduct charge

first_img Press Association A Chelsea spokesman said it was unfair to take Zouma’s words at face value. “It’s a bit harsh to take literally the words of a young player speaking in his second language immediately after a game,” the Chelsea spokesman said. “Kurt is deeply upset that his words have been used to attack a team-mate and a friend.” Regarding Gabriel, the FA statement continued: “Arsenal defender Gabriel has been charged with improper conduct for his behaviour following his dismissal, whilst team-mate Santi Caz orla has been warned for his behaviour following his sending-off. “Both clubs have been charged for failing to control their players under FA Rule E20.” Arsenal said they would appeal for both wrongful dismissal in relation to Gabriel and the length of his ban. A statement read: “The club can confirm that it is appealing wrongful dismissal and the three-match ban given to Gabriel.” Chelsea must decide quickly whether to appeal against Diego Costa’s violent conduct charge after the Football Association began disciplinary proceedings following an ill-tempered clash with Arsenal. Costa has been cited for an incident involving Gunners defender Laurent Koscielny in his side’s 2-0 win at Stamford Bridge, with the Blues given until 6pm on Tuesday to respond. The case for the defence became a little murkier on Monday when Chelsea defender Kurt Zouma was forced to explain comments in a television interview that the Spain striker “likes to cheat a lot”. Arsenal have already signalled their intent to appeal against Gabriel’s sending-off in the match, but he has also been handed a separate charge of improper conduct. Both London clubs face charges of failing to control their players, with a reply deadline of 6pm on Thursday. The FA said in a statement: “Diego Costa has been charged for an alleged act of violent conduct which was not seen by the match officials but caught on video. “The Chelsea forward was involved in an incident with Arsenal’s Laurent Koscielny in the 43rd minute of the game. He has until 6pm (on Tuesday) to reply. “Off-the-ball incidents which are not seen at the time by the match officials are referred to a panel of three former elite referees.” Costa’s behaviour was the subject of a post-match television interview with Zouma, during which the French defender made potentially inflammatory comments that both he and the club attempted to clarify on Monday. The 20-year-old told beIN Sports: “Everyone knows Diego and this guy likes to cheat a lot and put the opponents out of his game, and that happened in the game. He’s a real nice guy in the life and we are very proud to have him.” Zouma posted an explanation on Twitter saying: “Sorry for any confusion, English is not my first language & I did not mean to accuse anyone of cheating. Simply to say Diego is a player who puts pressure on his opponents & who I have huge respect for.” last_img read more

No. 1 seed Syracuse falls to No. 4 seed North Carolina, 16-15, in the ACC tournament

first_img Facebook Twitter Google+ Published on April 28, 2017 at 10:48 pm Contact Charlie: [email protected] | @charliedisturco DURHAM, N.C. — Syracuse is used to these late-game situations. Battling back from a deficit as the game winds down has become a normality for the top-ranked team in the country. SU already defeated North Carolina two weeks ago after trailing by five. But the deficit had never been nine — and never has Syracuse battled back from such a steep hole to win.That held true in the first round of the Atlantic Coast Conference tournament, as No. 1 seed Syracuse (11-2, 4-0 ACC) fell just shy of making its largest comeback in program history. No. 4 seed North Carolina (7-7, 1-3) used a dominant 11-1 first-half run, jumping out to a nine-goal lead and eventually defeating the Orange, 16-15. The Orange’s first loss since Feb. 25 against Army also marks the first time Syracuse will not play in the conference championship since joining the ACC.Syracuse struck first with a Jamie Trimboli left-handed shot. That was Ben Williams’ last faceoff win for the next 21 minutes and 16 seconds. North Carolina slowly picked apart the SU defense after each faceoff win. The offense gelled as a unit and used its transition offense to jump out to an early lead. Ten different Tar Heels contributed a goal in what became an 11-1 run.“The transition game sparked the offense,” UNC head coach Joe Breschi said. “We were getting those early offensive looks, scoring, winning faceoffs, settling down in the six on six and took care of the ball.“We weren’t forcing things — we were looking for the right matchups.”After Trimboli’s goal, the Orange could not find the back of the net for roughly a quarter. The few looks the offense had in transition resulted in turnovers or saves and transition in the opposite direction. SU’s only goal in the UNC first-half run came on a fast break by Peter Dearth — Sergio Salcido forced a turnover, picked up the ground ball and found an open Dearth cutting toward the cage.AdvertisementThis is placeholder text“We didn’t get a chance to play of lot of offense in the first half,” Syracuse head coach John Desko said, “and they got the early lead.”With Williams losing faceoff after faceoff, Desko decided to make a change. He went with freshman Danny Varello, an otherwise consistent producer at the X in the bits and pieces he has played throughout the season. But even Varello could not figure out UNC’s Stephen Kelly, who won 13 straight after losing the opening faceoff.Kelly’s success at the X led to quick transition goals. Ten seconds after Syracuse’s only goal in the 11-1 run, long pole Jack Lambert picked up the ground ball off a Kelly faceoff win and fired a shot past Evan Molloy. Less than 10 minutes later, Lambert broke out in transition, wound up and fired top shelf.Each faceoff win quickly resulted in long possessions for North Carolina. The team passed the ball around, using its top threats — attacks Chris Cloutier and Luke Goldstock — as well as its younger players, like Tanner Cook, Justin Anderson and Andy Matthews. The Syracuse defense tried sliding to adjust, but that only created holes. Over a handful of times UNC’s passing resulted in an opening and one-on-one with goalie Molloy.“Drawing slides, drawing men and being able top see the whole field,” Cloutier said. “We’re meshing really well right now.”When the SU defense would stick close to the attacks and cut off the passing lanes, UNC worked the ball up to the midfielders, who attacked the short sticks. Early in the game, Michael Tagliaferri scored his first after beating Joe Gillis on a dodge.“We wanted to do to them what they were doing to us,” Desko said. “Start some fast breaks going from defense to offense … Their poles are very good offensive players and to make the shots they made with their poles, we knew that could happen.”Syracuse has had a similar script in most of its games this season. A late comeback, a chaotic ending and a one-goal game normally ending in its favor. But this time, a dreadful first half reversed the script.“It just got away from us in the second quarter,” Desko said. “There wasn’t anything we were really doing well.” Commentslast_img read more