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The effects of temperature on metabolic rate and protein synthesis following a meal in the isopod Glyptonotus antarcticus, Eights (1852)

first_imgSeawater temperatures in Antarctica are low, and typically rather stable seasonally. Associated with this, many marine invertebrates have low resting metabolic rates with a limited aerobic scope, and are often stenothermal. We have therefore investigated the response of metabolic rate and protein synthesis to feeding in the large Antarctic isopod, Glyptonotus antarcticus, at two different temperatures. The resting oxygen consumption of starved Glyptonotus was low, and comparable with a previous measure for this species and other Antarctic marine invertebrates. Resting metabolic rate exhibited a Q10 of 2.18 between 0°C and +4°C. After feeding at 0°C, oxygen consumption increased by a factor of 2.5 and ammonia excretion eightfold, before returning to prefeeding levels, in a classic if somewhat prolonged SDA (specific dynamic action) response. At 4°C, the postprandial factorial increase in both oxygen uptake and ammonia excretion was reduced. Whole-body protein synthesis rates for prefeeding animals showed a similar Q10 to oxygen consumption. Rates of synthesis increased significantly after feeding, and there was an associated drop in the O:N ratio, indicating that protein formed the primary metabolic substrate during the SDA response. The contribution of the costs of protein synthesis to the overall SDA was estimated to be 68%, although this estimate is based on a previous estimate of the costs of protein synthesis in Glyptonotus which is higher than typical values for temperate-water crustaceans. The fraction of ingested energy utilised in the SDA was, however, low (2-3%). Further work is needed to determine whether these unusual features in Glyptonotus are typical of polar marine invertebrates in general.last_img read more

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Video: Baking Industry Awards

first_imgThe Baking Industry Awards may have been and gone for 2015 – but you can relive the glamour of the fabulous evening thanks to our exclusive video.Baker and William Reed Business Media, was Alex Gooch from Alex Gooch Artisan Baker in Powys, who came away with the coveted Baker of the Year title, sponsored by Brook Food Processing Equipment.Other winners included Sainsbury’s, which scooped the award for In-store Bakery Retailer of the Year, sponsored by Zeelandia, for the second year running.The prestigious event took place at London’s Park Lane Hilton and featured 11 award categories. To find out who won what, or to register your interest for next year, see www.bakeryawards.co.uk.last_img

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Sanders needs Michigan win, but Biden looking strong with key voting blocs

first_imgSanders goes into Michigan badly in need of a win after former Vice President Biden seized control of the race on Super Tuesday this week, winning a bevy of Southern states as well as Massachusetts, Minnesota and Texas and causing rivals Michael Bloomberg and Elizabeth Warren to drop out.Michigan is the most competitive of the six states that hold nominating contests on Tuesday. It offers the largest number of the minimum 1,991 delegates a candidate needs to secure the nomination outright: 125. And it’s a critical moment for Sanders to try to recapture momentum before the contest shifts to Florida and Illinois the following week.In addition to Michigan, Washington state, Mississippi, Miissouri and Idaho will be holding primary elections on Tuesday. North Dakota will hold caucuses.A Sanders loss in Michigan could give Biden an insurmountable lead as the state-by-state nominating process moves into friendly territory for the man best remembered as No. 2 in President Barack Obama’s historic administration. For Bernie Sanders to remain competitive with Joe Biden in the battle for the Democratic presidential nomination, he’ll have to repeat what he did four years ago: Win the Michigan primary.This time around, that probably will be harder.Ahead of Tuesday’s vote, Biden is showing strength with the same kinds of voters that Sanders, a U.S senator from Vermont, relied upon in his surprise defeat of front-runner Hillary Clinton in the state in 2016. The state also greatly matters for Nov. 3 general election. It flipped Republican in 2016, voting for now-President Donald Trump over Clinton by just over 10,000 votes.”Michigan is your got-to-win state,” said Adam Hollier, an African-American state senator from Detroit who is backing Biden.Biden parlayed his popularity with black voters into huge gains on Super Tuesday, winning 70% of African-American voters in Alabama and Virginia and 60% in North Carolina and Texas, according to exit polls from Edison Research.They will be crucial in Michigan, where they comprise almost 14% of the population. Some areas of Detroit are 80% African-American.”When you look at what he did all across the South, those same demographics are going to be at play in Detroit,” Hollier said.Sanders canceled plans to campaign in Mississippi this weekend, focusing instead on Michigan.Union labelsSanders may have better luck with union voters in manufacturing-heavy Michigan. He won the state’s white working-class voters in 2016, and they remain a reliable part of his base.Richard Cassel, 28, lost his job as an auto engineer in Detroit last month. That same week, he walked into a Sanders campaign office and volunteered to work the phones.”For me, Biden is just more of the same. The middle class is working professionals, and everyone else is slowly drowning,” Cassel said.But Biden has long-standing ties to labor unions and routinely talks about how the middle-class and union members built the nation.The powerful United Auto Workers Union has yet to endorse any candidate, but its spokesman, Brian Rothenberg, said it supports the idea of universal healthcare. Sanders has made a government-run healthcare system, Medicare for All, the heart of his campaign.”The high cost of healthcare is one of the impacts when you’re bargaining, so universal healthcare would actually give you a better ability to bargain at the table,” Rothenberg said.Not all of Sanders’ positions play well with the state’s unions, though. In particular, he has called for the closure of a 66-year-old crude oil pipeline that runs below portions of the Great Lakes, as part of his sweeping plan to swiftly end the US fossil fuel economy to fight climate change.”It’s going to cost (Sanders) a lot of support in our union,” said Terry Gilligan, business manager of Detroit Pipefitters Local 636.And two Michigan chapters of the United Food and Commercial Workers Union endorsed Biden on Friday.Sanders is running ads in Michigan criticizing Biden over his past support for global trade deals such as the North American Free Trade Agreement (NAFTA). Biden, in turn, argues that he was a key player in the 2009 auto industry bailout that rescued jobs in the state.RURAL RUNIn 2016, Sanders performed surprisingly well in the wealthy suburbs outside Detroit and blew Clinton away in rural counties. But there is evidence he won’t do that again this time.On Super Tuesday, Biden consistently beat Sanders in suburbs outside of cities including Charlotte, North Carolina, and Houston.And in rural regions of Minnesota, a Midwestern state like Michigan with a largely white population, Biden smashed Sanders, 43% to 19%, according to exit polls.This weekend, Biden’s campaign will deploy former presidential candidate Amy Klobuchar, a senator from Minnesota, to stump in Grand Rapids – an area that Sanders won in 2016.Dawn Bryant, 40, a General Motors Co factory worker who was laid off earlier this year, said she was torn between Sanders and Biden.”I’m divided. I’m not sure. I’m going to keep watching and weighing my options on both of the candidates,” she said. “It’s a tough, tough call.”Topics :last_img read more

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DHTA strongly condemns recent violent attacks on visitors

first_imgLocalNews DHTA strongly condemns recent violent attacks on visitors by: – February 16, 2012 9 Views   no discussions Sharing is caring! Share Sharecenter_img Share Present and past DHTA Presidents, current president Ms Yvonne Armour standing to the far right on the front row.The Dominica Hotel and Tourism Association has expressed deep concern and has categorically condemned recent violent attacks on visitors to the island.In a press release the DHTA notes that not only are these attacks an “affront to the common decency of all Dominicans”, it can potentially negatively affect the tourism sector.“The actions of a few threaten not only the Tourism Sector and our economy, but the very fabric of our society. We call on all Dominicans to join the DHTA in expressing indignation and to play their part in addressing the issue at hand.”The organization also held a meeting last evening and invited former presidents of the Association to provide “a historical perspective and to chart a way forward to address crime”According to the press release, the members “expressed a sense of outrage and called for an urgent action plan”.The members have decided on an action plan and the first step which the Association will take is “to encourage Bi-Partisan support for a resolution to be tabled in Parliament on the 16th February 2012, expressing outrage on the part of Parliament and calling for urgent action by all political parties”.The release also noted that “the DHTA is unified and committed to working with all stakeholders in tackling crime” and therefore calls on “all Dominicans to be vigilant in the struggle to preserve the peaceful and friendly image of our Nature Island”.Dominica Vibes News Tweetlast_img read more

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