Bus driver slapped with armed robbery, firearm charges

first_imgA minibus driver was on Wednesday remanded to prison by Magistrate Fabayo Azore when he appeared at the Georgetown Magistrates’ Courts charged with armed robbery and being in the possession of an illegal firearm.Thirty-three-year-old Philbert McPherson of Lot 707 Turkeyen, Greater Georgetown, pleaded not guilty to the charges when they were read to him.The Police stated that on April 20, 2018 at the Criminal Investigation Department (CID), Eve Leary, he had in his possession one .30 pistol without being the holder of a firearm licence.In addition, the Police said that on April 25, 2018, McPherson robbed Jagdeo Ramnauth of his mobile phone, wallet and cash totalling $246,000.The facts of the case were not presented to the Court by Police Prosecutor, Simone Payne who explained that the case file is still incomplete.McPherson will make his next court appearance on May 30.last_img read more

Police host “Health & Safety” awareness walk in Linden

first_imgThis all-female team was rewarded with a trophy for participation and early attendance at the end of Friday’s awareness walkIn observation of Occupational Safety and Health Month 2019, the Guyana Police Force’s E Division (Linden-Kwakwani) held a “Safety and Health” awareness walk on Friday in Linden, Region 10.The event was spearheaded by the Division’s Community Relations Officer, Assistant Superintendent Palesa Peters-Fernandes, and Woman Inspector Colette Evans. The awareness walk, held under the theme “Safety and Health and the future of work, building on the knowledge and achievements accumulated over the years”, saw the participation of some 30 other ranks.The journey started from the Mackenzie Hospital and ended at the Mackenzie Sports Club ground.The walk also saw the attendance of Senior Safety and Health Officer of the Social Cohesion Ministry, Rondel Cole.In a statement from the Police Force, it was noted that the country’s premier law enforcement agency has placed great emphasis on the importance of its human resources, which have been highlighted as a primary focus in its ongoing reform process.The Force has also, through its Safety and Health Officer Deputy Superintendent Dexter Brown, strategically implemented mechanisms to identify and report potential Occupational Safety hazards throughout the Force.last_img read more

Govt uses majority to pass Local Authority Amendment Act

first_img– votes down PPP amendmentsBy Jarryl BryanTabling of the Local Authority Amendment Act by Minister of Communities, Ronald Bulkan, may have in principle received support from the parliamentary Opposition; but that support was not unconditional, as the Government was confronted with the ghost of its actions in the past.Former Attorney General Anil NandlallAmong other things, the bill addresses the terms of office, tie resolution, and plurality principle, among other issues. During Monday’s sitting, Bulkan noted that if passed, the bill would allow for democratic election of regional leaders at all levels.“Honourable members would be aware of the agenda of this administration to allow for democracy; in this regard, to honour Article 12 of the Constitution, which speaks to the democratic organs of the state,” Bulkan explained.He noted that the bill “seeks to amend six pieces of legislation; namely, the Municipal and District Council Act, Chapter 28:01; the Local Government Act, specifically to Section 28; the Local Authorities Election Act, the Local Democratic Organs Act, Local Authority Elections Amendment Act 1990 to Section 7, and the Election Laws Amendment Act 2000 to Section 7:1.”But People’s Progressive Party (PPP) frontbencher Anil Nandlall reminded the Government of its track record of appointments in Local Authority Areas (LAA) when ties resulted from Local Government Elections (LGE).“Bulkan has regaled us on the bill before the house. And the Minister should have accepted credit for himself for bringing a bill to correct the wrong that he himself has committed,” Nandlall noted. “The law is very clear: Where there is a tie at the level of Chairman and Vice Chairman, and there is what the law calls an inability to elect one or the other because of the votes, the law says that the returning officer within 10 days must fix a date for by-elections: go back to the electorate that voted at the last election (and) with the two candidates instead of the list of candidates,” Nandlall explained.“Where is the ambiguity in that? If the Honourable Minister, in violation of that law, imposes himself on the overseer? He challenged.“That is why the judge granted this order, an order of nisi certiorari, quashing the decision of Bulkan in selecting Gershon Clarke as Chairman of Woodlands/Farm NDC on the grounds that the decision was contrary to the Municipal District Councils Act Chapter 28:02. It’s unreasonable. It’s arbitrary. It’s capricious. It’s malicious. It’s vindictive. It’s null and void,” Nandlall expanded.Attorney General Basil Williams has argued that Bulkan followed the procedure as spelled out, and with the resulting ties, acted according to the law. He stressed that the bill only seeks to clear up the issue, and claimed the opposition “cannot lecture us.”Opposition MP Colin Croal backed up Nandlall’s arguments, noting that Bulkan is seeking to correct the wrongs he had already done. Taking on Williams’s contention that the government has provided the “good life” for the LAAs, Croal challenged Government to provide evidence of consultations.His colleague Parliamentarian Allister Charlie also claimed that no consultations were carried out in Aranaputa. While the PPP raised objections due to several clauses in the bill and sought to have their amendments carried, the Government remained resolute against the inclusion of the PPP’s amendments.Bulkan claimed that had the amendments been received earlier, they would have been considered.Speaker of the House, Barton Scotland, revealed that the amendments were received on Monday.The amendments were then read, at which time the numerical advantage of the Government side caused each and every amendment to be voted down. On that basis, the bill was passed as is.It was only in March that the People’s Progressive Party/Civic (PPP/C) Councillors in Mabaruma had announced they had collectively decided to continue their boycott of all meetings chaired by incumbent Mayor Rupert Henry Smith after he was re-appointed Mayor by Communities Minister Ronald Bulkan.In April of 2017, Justice Diana Insanally quashed the appointment of Smith, an APNU appointee, as the Mayor of Mabaruma, Region One, and ordered that fresh elections be held.The ruling was as a result of PPP’s Zulfikar Mustapha challenging the decision by Bulkan to appoint a mayor after there had been a 6-6 tie in the number of seats won at the 2016 Local Government Election. A runoff produced similar results.last_img read more

Juventus chief claims: Falcao wanted to join us, not Man United!

first_img1 Radamel Falcao wanted to join Juventus before he opted for a move to Manchester United this summer, according to the Serie A club’s CEO Giuseppe Marotta.Falcao signed for United on a season-long loan on transfer deadline day in September, joining the Red Devils from French club Monaco.The temporary deal is reportedly costing Louis van Gaal’s men around £20m, including wages and a loan fee paid to Monaco.And, according to Marotta, it is the huge costs involved which prevented Falcao from making the switch to Juventus instead of the Premier League side.“We were following him and there was contact,” Marotta told RAI.“We were very close to [signing] Falcao and the player preferred Italy and our colours, but then United came forward and they have much more spending power than we do so the deal broke down.”Falcao’s Old Trafford career has yet to fully take off.He has scored just one goal this season and missed the draw with Chelsea at the weekend through injury. Radamel Falcao last_img read more

England dream of World Cup glory as Russian fans thank team

first_imgThey will face Croatia, who had to endure a strength-sapping penalty shootout for the second consecutive match, in front of 80,000 people in Moscow’s Luzhniki Stadium on Wednesday.But first Roberto Martinez’s exciting Belgian side will attempt to reach their first ever World Cup final when they play favourites France in Saint Petersburg on Tuesday.England is basking in the team’s run to the last four of the World Cup as fans start to believe that they can lift the trophy for the first time since 1966.“Southgreat” trumpeted the Sun on Sunday. “Cry God for Harry, England and St George!” said the Sunday Telegraph.Croatia defender Domagoj Vida celebrates after scoring a goal in extra-time in the World Cup quarter-final against Russia © AFP / Kirill KUDRYAVTSEVGoals from Leicester defender Harry Maguire and Tottenham’s Dele Alli sealed victory against Sweden in Samara while man-of-the-match Jordan Pickford made three outstanding saves.“England’s players have guaranteed they will return from the World Cup as heroes. Now they can dream of a grander ambition. Can they come home as legends?” asked former England defender Jamie Carragher in a column for the Sunday Telegraph.– No FIFA ban for Vida –Croatia defender Domagoj Vida escaped a FIFA ban on Sunday after posting a clip dedicating his country’s victory over Russia in the quarter-finals to Ukraine.The former Dynamo Kiev player scored an extra-time goal and one of Croatia’s penalties in a 4-3 shootout win over the World Cup hosts in Sochi on Saturday.The ponytailed 29-year-old shouted “Glory to Ukraine!” in a video posted by former Croatia international Ognjen Vukojevic shortly after the match.Russia supporters pictured during the visit of their team to a Moscow fan zone on July 8, 2018 © AFP / Maxim ZMEYEVFIFA said it had studied the video and decided to issue a warning to Vida but would take no further measures.Vida told Russian media after the clip was made public that he had meant no offence. “I love Russian people,” Vida was quoted as saying. “It was just a joke.”“Glory to Ukraine!” was a slogan of the former Soviet republic’s pro-EU revolution that toppled a Russian-backed president in 2014.The revolt was condemned as illegal by Moscow and sparked a crisis in relations between the two neighbouring states.Looking forward to the match against England, Croatia coach Zlatko Dalic told a press conference on Sunday that the game would be more open.Russia’s players react to their defeat on penalties by Croatia in the World Cup quarter-finals © AFP / Adrian DENNIS“Our last three games were different because we played teams with a defensive approach,” he said.“But we are looking forward to a different style of game against England because they like to play attacking football.”– Russian fans pay tribute –Russian fans paid tribute to their team, who exited the tournament after their defeat on penalties following 120 gruelling minutes of football.The Russians were the lowest-ranked of the 32 teams at the World Cup but, just as in the previous round against Spain, they refused to die despite enjoying just 36 percent of possession against a superior Croatian team.Coach Stanislav Cherchesov led his players onto a stage to a heroes’ welcome in a Moscow fan zone.“You were not the 12th player — you were the 12th, 13th, 14th, 15th and 16th players,” Cherchesov told the crowd.“We felt your support from the first second.”Midfielder Denis Cheryshev dedicated his four goals — tied for second-most in the tournament behind England forward Harry Kane’s six — to “the whole country”.President Vladimir Putin has invited Cherchesov and his charges to the Kremlin and Prime Minister Dmitry Medvedev commiserated with the players in the dressing room after the defeat.Away from Russia, the Spanish football federation said Fernando Hierro, who stood in as Spain coach when Julen Lopetegui was sacked on the eve of the World Cup, would not continue in the role.Under the former Real Madrid and Spain defender, who had little previous coaching experience, 2010 winners Spain lost on penalties to Russia in the last 16.0Shares0000(Visited 1 times, 1 visits today) 0Shares0000England fans celebrate after their team beat Sweden in the World Cup quarter-finals © AFP / Maxim ZMEYEVMoscow, Russian Federation, Jul 8 – England were Sunday looking forward to their first World Cup semi-final since 1990 as Russian fans thanked their disappointed players after their fairytale World Cup run was halted by Croatia.Gareth Southgate’s young team swept Sweden aside 2-0 on Saturday, sparking mass celebrations in England, where at least 20 million people watched the match on TV.last_img read more

Leinart should be applauded for staying

first_imgNow, there are no player haters here. I certainly have no right to question Young for leaving school early for the opportunity to support his family for generations to come. But Young’s decision to turn pro should make every sports fan appreciate now-former USC quarterback Matt Leinart that much more. AD Quality Auto 360p 720p 1080p Top articles1/5READ MORECoach Doc Rivers a “fan” from way back of Jazz’s Jordan ClarksonOne year ago, his situation was nearly identical. USC’s junior signal-caller was coming off a Heisman Trophy-winning season, a record-breaking performance in the BCS title game and was nearly certain to be the top pick in the NFL draft. Instead, Leinart elected to stay at USC for his final year of eligibility. Leinart’s decision was as romantic as it was rare – a superstar college athlete passing up certain millions of dollars for one more season of football and life at a university. Reggie Bush will soon announce his intention to leave USC, but who should question that decision? Or perhaps that of teammate LenDale White, whose stock likely rose nearly as much as Young’s at the Rose Bowl? As of Monday night, a total of 30 underclassmen – including UCLA’s Maurice Drew – have entered April’s NFL draft. It’s a list that might double by next weekend’s deadline. These young men are simply doing what every college student eventually hopes to do. They are taking the skills learned in school and applying them to their career when given that chance. Everyone should be so lucky. At the same press conference last year in which Leinart decided to stay, linebacker Lofa Tatupu made the decision to leave and enter the NFL. Some questioned the decision, but now he’s the likely NFL defensive rookie of the year. Tatupu made the right decision and who knows, Leinart might have been offensive rookie of the year. Those circumstances make Leinart’s decision to stay at USC even more extraordinary. The San Francisco 49ers took Utah’s Alex Smith first overall last year and signed him to a $49.5 million contract, including $24 million in guaranteed money. That payday would have been Leinart’s. Now, one can’t be completely naive. Leinart knew that with his injured left throwing elbow, which required off-season surgery, the 49ers might have passed him up. Perhaps he wisely knew that he would improve in his final season at USC, making him more likely to make an immediate impact in the league and therefore score with the real prize – a second contract. For example, Carson Palmer made an immediate NFL impact and earned that elusive second contract worth a possible $115 million, making the contracts of recent top picks Smith, David Carr and even Michael Vick look like chump change. But with Leinart’s decision to stay, there were no guarantees. He was not guaranteed to be a repeat Heisman winner. And he didn’t get it. He was not guaranteed to win a national championship. And he didn’t get it. He was not guaranteed to be picked No. 1 in the draft this year. And he probably won’t get it. Immediately after the Rose Bowl, an ABC reporter asked Leinart about his decision to stay in school, inferring that it was a mistake. Others have said that Leinart was outshined in the game and actually hurt his NFL stock. These people need their heads checked. Sure, Leinart made some mistakes in the Rose Bowl. He threw an interception in the end zone, had two other balls potentially picked off and took a couple costly sacks. But mostly, he was his usual brilliant self. Leinart was 30 for 40 with 365 yards, and threw just two incompletions in the entire second half and for all the praise Young has deservedly received, Leinart’s performance has been unfortunately forgotten. If the game were 30 seconds shorter, USC wins and Leinart is the star. If the game were 30 seconds longer, USC likely wins (or at least temporarily ties) and Leinart is the star. Instead, the game was a perfect 60 minutes, and Leinart is an afterthought. Leinart later expressed, “I have no regrets.” And why should he? Finishing third in the Heisman voting is not failure. Losing a championship game is not failure. Getting picked second or third in the NFL draft is not failure. In defeat, Leinart’s greatness should only be amplified. “Matt’s graduated. He’s going to get paid a ton more money than last year and he got to play for his college one more time,” USC coach Pete Carroll said after last Wednesday’s game. “I know he wouldn’t trade his experiences for anything. “He’s a living example for other people and that makes him a great leader, almost in a small way and icon in the world of college football and we’re very lucky we had time with him.” keven.chavez@sgvn.com (626) 962-8811, Ext. 2239 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!center_img One week ago, Texas quarterback Vince Young was an All-America quarterback with a questionable future in the NFL. One All-World performance in the BCS Championship Game and Young’s NFL stock immediately reached Google-level heights. Young, a potential second-round pick, is now a potential second-overall pick and the college junior on Sunday declared himself eligible for the draft. last_img read more

Woods’ shadow still looms on Lefty

first_img Having completed his round before the weather hit, Tiger wasn’t on the course Monday, but was a presence as long as there was any chance Mickelson (4-under), Elkington and Bjorn (3-under) would let him into a playoff. Watching Mickelson walk the last five fairways Monday, you imagined Tiger to be the devil standing on Phil’s shoulder, whispering negative thoughts. For all the good that San Diego’s Mickelson has done, his record on occasions when he and Orange County’s Woods have come down the same homestretch is a nightmare. From the 2000 Masters to the 2005 Masters, they both finished in the top 10 in one of the four major events seven times. Woods won five of those tournaments, Mickelson none. Tiger’s victories included the 2001 and 2002 Masters (Phil was third each time) and the 2002 U.S. Open (Phil was second). When Phil scored his breakthrough victory in the 2004 Masters, he did it without a challenge from his tormentor (Tiger was 22nd). It made sense, therefore, when Mickelson’s worst stretch of the PGA Championship, the front nine on which he briefly gave back a three-stroke lead Sunday, came as Woods’ name was appearing on the Baltusrol leaderboards for the first time all week. Would Phil hear footsteps Monday? He began by sinking a pressure three-footer to par the 14th hole and keep the lead. He settled for par on 15 after starting with a 3-wood, a choice which one of the CBS men called “indicative of lack of confidence in the driver.” A poor bunker shot on 16 sent him to a bogey and made it a three-way tie at 3-under. The smile remained fixed. Mickelson parred 17. Then came the drama of the par-5 18th hole. Before his second shot, 247 yards from the green, Mickelson reached out for good karma and tapped his 3-wood on the plaque commemorating Nicklaus’ U.S. Open-winning 1-iron in 1967. Then he pulled the shot into the rough beside the green. Mickelson had a tough chip to worry about but he no longer had the threat of Woods to preoccupy him. Elkington had made sure of that minutes earlier by finishing up at 3-under. Mickelson hit the chip with the combination of rough-slicing strength and green-holding finesse that dazzles his fans. He pumped a fist as the ball flopped to within three feet of the cup. By making the birdie putt, Phil ended one hex. He finally won a major in which Tiger also finished playing well (tied for fourth). But Mickelson didn’t actually have to beat back a challenge from Woods. He didn’t have to execute that difficult chip with his nemesis in sight. Until last year’s Masters, the question was whether Mickelson would ever win a major. Until Monday, it was how soon Mickelson would win another. This was just a warm-up for the rivalry everybody wants to see. Now the question is what happens the next time Phil gets the chance to beat Tiger head to head. Now that would be a reason to get out of bed on a Monday morning. Kevin Modesti’s column appears in the Daily News three days a week. He can be reached at heymodesti@aol.com. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! Does Phil Mickelson strike that 18th-hole chip shot as crisply if Tiger Woods is standing beside the green Monday, still a contender to win the tournament, poised to take advantage of a Phil flub? Sometimes great contests produce bigger questions than statements, and that’s the case with Mickelson’s PGA Championship victory, which left all of the top finishers to ponder what might have been. Tying for second place at 3-under par a stroke behind Mickelson and a stroke ahead of Woods and Davis Love III Steve Elkington and Thomas Bjorn could only think about their near misses on final-hole birdie putts. But Woods and Mickelson, the stars of the PGA Tour, had to think about bigger things. Things that have shaped their almost-rivalry for the decade since Tiger came out of Stanford. Things that will continue to whet the golf fan’s appetite for the day a man-to-man showdown changes the pecking order between the two California natives. center_img AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREThe top 10 theme park moments of 2019 For want of any strokes that got away from Woods in his 5-over-par first round before his dramatic rally to make the second-round cut and climb the fourth-round leaderboard Tiger would have finished 3-under and in position to join a tie-breaking playoff if Phil stumbled. Tiger would have had a chance to win an 11th professional major tournament and tie Walter Hagen for second to Jack Nicklaus’ 18. Had Woods gotten to 3-under, the emotions of the unusual Monday morning finish might have been entirely different for Mickelson, making it harder for the leader to control his nerves. Phil would have had a chance to stare down the old suspicions that he and every other contender is vulnerable to Tigerphobia any time they have Woods to beat. Such was the plot awaiting armchair sports psychologists who turned on CBS at 7 a.m. PDT to watch Mickelson and 11 of his pursuers play the holes they hadn’t reached before thunderstorms in Springfield, N.J., emptied the Baltusrol Golf Club course Sunday evening. last_img read more

Cerritos takes down Palomar JC wrestling: Wins by Valdivia, Doran key victory.

first_imgThe present of Cerritos College wrestling met the past on Wednesday night, and Palomar definitely met its match. The Falcons held Alumni Night at Falcon Gym, welcoming back scores of former wrestlers and coaches. They were treated to a dominating performance by Cerritos, which improved to 2-0 in South Coast Conference action with a 39-15 victory. “I thought we were going to win,” said second-year Cerritos coach Steve Glassey, “but I thought it would be a little closer. The guys are starting to come along, starting to turn the corner.” The Falcons won at seven of nine contested weights they forfeited at 157 pounds and posted six pins. AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREWalnut’s Malik Khouzam voted Southern California Boys Athlete of the Week Glassey said the meet swung in Cerritos’ favor with wins by heavyweight Brandon Doran and Jimmy Valdivia at 125. “Once we had those two matches, I knew it was over,” he said. The first match of the night was at 184 pounds, where Palomar’s Ryan Nejal posted an 11-5 victory over Luis Audelo. But Cerritos won at the next four weights to take control. Emanuel Newton, ranked second in the state at 197, pinned Mike Ciacioppo in 4 minutes, 42 seconds and Doran pinned Tyler McKay in 1:21. Doran is ranked fifth in the state while McKay is ranked third. McKay, who placed fourth in the state last year, topped Doran two weeks ago in the semifinals of the Golden West Tournament. Valdivia normally a 133-pounder, where he’s ranked third in the state then came through with his 3-1 victory over David Navarette, ranked fourth in the state. center_img “(Valdivia) looked really good,” said Glassey. “Jimmy’s the one who kind of did it in for (Palomar).” Andrew Holmes (133), Tony Aparicio (149), Jeff Davis (165, ranked third in the state) and Ronnie Hopkins (174) closed out the night with pins. The Falcons originally were going to forfeit at 141 pounds but instead used John McCaleb, a 125-pounder. He was pinned by Palomar’s Dan Castro in 2:36. Cerritos travels to the Southern California Regional Duals meet this weekend at Moorpark College. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!last_img read more

LORETO LETTERKENNY CELEBRATES ANOTHER OUTSTANDING YEAR

first_imgTessa Ah Heng and Niamh Farrell were identified as high achievers in Mathematics in the 2013 Junior Certificate.Lilla Kardos, Derek Hill Memorial Plaque in Art Katie Kilcoyne and Katie Bailey from the European Youth Parliament, who represented Ireland at the European Conference in Tbilisi, Georgia and Delft in the Netherlands Ulster Colleges GAA All Stars -Rose Boyle, Kaneshia Mc Kinney, Naomi Mc Menamin and Marie O’ ReillyJunior Academic Student of the Year achieving 11 A1’s in her Junior Certificate – Danielle HarkinJane Gormley received the Ad Astra scholarship from UCD for her outstanding Leaving Certificate results, Senior Academic Student of the Year achieving 7 A1’s at Higher Level in her Leaving Certificate and Spirit of Loreto Award 2013 and she is pictured receiving Mathematics Student of the Year from Ms. Ann Carroll.  Schools’ Rugby Team who won the Donegal Schools’ Rugby CupLORETO LETTERKENNY CELEBRATES ANOTHER OUTSTANDING YEAR was last modified: June 25th, 2014 by John2Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window) Tags:2014Achievement awardsLoreto Letterkennylast_img read more

Your Supernatural Teeth

first_imgAspects of human teeth appear over-designed for their function.Apparently German scientists are less reticent about appealing to the supernatural in science. We’re saying this partly in jest, of course, because they did not really invoke spirits in the title of a press release from Charité – Universitätsmedizin Berlin, “Dentin nanostructures – a super-natural phenomenon.” They’re only explaining “Why it is superior to any synthetic filling material at making teeth last.” It’s super-human, perhaps.Dentin is one of the most durable biological materials in the human body. Researchers from Charité – Universitätsmedizin Berlin were able to show that the reason for this can be traced to its nanostructures and specifically to the interactions between the organic and inorganic components. Measurements performed at BESSYII, the Helmholtz-Zentrum Berlin’s synchrotron radiation source, showed that it is the mechanical coupling between the collagen protein fibers and mineral nanoparticles which renders dentin capable of withstanding extreme forces. Results from this research have been recently published in the journal Chemistry of Materials.How extreme are the forces dentin can withstand? They found that dentin is much stronger than actually needed for chewing.As part of their experiments, the researchers increased the compressive stress inside the dentin samples. The samples were also dried by heating them to 125ºC. This resulted in the collagen fibers shrinking, leading to huge stress being exerted on the nanoparticles. The ability to withstand forces of up to 300 MPa is equivalent to the yield strength of construction grade steel, and is comparable to 15 times the pressure exerted during mastication of hard food, which usually remains well below 20 MPa. Heat treatment did not lead to the destruction of the protein fibers, suggesting that the mineral nanoparticles also have a protective effect on collagen.Our teeth come into contact 5,000 times a day, the article says. That’s 1.8 million times a year, or almost 200 million times in a lifetime. “In spite of this, and although we often use large forces during mastication, it is surprisingly rare for healthy teeth to break,” they say. If evolution hit on this “super-natural” ability, the scientists didn’t say so. Instead, they appealed to design: “It is widely accepted that the design of teeth makes teeth tough, where an inner core, known as dentin, supports the outer hard enamel cap.”Not only is dentin strong, it is organized in a way to resist stress. The material is a composite of collagen, a protein, and carbonated hydroxyapatite, or cHAP, a mineral (see diagram in the press release).  The structure is “surprisingly more complex” than they expected.Analysis of the data also showed a gradual reduction in the size of the cHAP crystal lattices as one moves deeper into the tooth. “Tissue found near the dental pulp, which is formed during the later stages of tooth development, contains mineral particles that are made up of smaller cell units,” explains Zaslansky. The nanoparticle length shows the same trend, with the mineral platelets situated near bone on the outer parts of the root measuring approximately 36 nm in length, while those found near the pulp are smaller, only 25 nm long.The enamel at the tooth surface is also strong but more brittle. Having the cushioning layer of dentin below protects against breakage; “the organic fibers found in dentin appear to exert exactly the right pressure on the mineral nanoparticles that is required to increase the material’s repetitive, cyclic load-bearing capacity.” Dentin’s resistance to compressive stress is “why damage or cracks in enamel do not extend catastrophically into the dentin bulk,” they say.Of course, bacteria can weaken teeth and form cavities; that’s why we have dentists. Bacteria can weaken the cHAP minerals and dissolve the collagen fibers. The new findings from Berlin can help. You might want to share this article with your dentist, or tell him or her to “keep teeth moist during dental procedures, such as when inserting dental fillings or installing crowns,” they say. “Avoiding dehydration may very well prevent build-up of internal stresses, the long-term effects of which remain to be studied.” Meanwhile, they hope what they learned can “be used as a model system for new materials development, for example when designing novel dental restoration materials.” If built the “super-natural” way, your next fillings could be far superior to the metals or composites currently in use.This is another great example of design science at work, seeking to understand a design and apply it for mankind’s benefit. The material is but one aspect of the design. Think about how teeth are arranged in the jaw, two sets of matching pairs that fit against each other. You have a set of tools from cutters to grinders arranged front to back, kept moist by six salivary glands that keep them moist and in good operation. All these work in concert with the tongue and the palate. And we haven’t even begun to discuss the innate behaviors that guide our chewing. That requires additional design in nerves that instruct the muscles and provide feedback, so that we know not to bite our tongues or to bite off more than we can chew. Working with all this are the senses of taste and smell. The result: what could be more pleasurable than a hearty meal among friends? Your salivary glands start secreting in advance of imagining your favorite food.That’s just human teeth. Dentition is widespread throughout the vertebrates, from fish to mammals. Even squid have a certain kind of teeth called sucker ring teeth not for digestion but for clinging (see pictures and description at Evolution News & Views). Each species has just the kind of teeth it needs for its diet: giant crushing molars for elephants, sharp teeth for piranha fish, huge sabers for dinosaurs. Some species can replace whole sets of teeth in a conveyor-belt fashion. We humans start with baby teeth that get replaced. It’s interesting to consider whether the original design provided for regeneration of teeth. There’s clearly enough design to make us stand in awe; and for the blessing of teeth we should be thankful to our great Designer.(Visited 108 times, 1 visits today)FacebookTwitterPinterestSave分享0last_img read more