May 28, 2014

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1,573 Posts to “May 28, 2014”

  1. Billybah says:

    Mist and microlightning solflare To recreate a scenario that may have produced Earth’s first organic molecules researchers built upon experiments from 1953 when American chemists Stanley Miller and Harold Urey concocted a gas mixture mimicking the atmosphere of ancient Earth. Miller and Urey combined ammonia NH3 methane CH4 hydrogen H2 and water enclosed their “atmosphere” inside a glass sphere and jolted it with electricity producing simple amino acids containing carbon and nitrogen. The Miller-Urey experiment as it is now known supported the scientific theory of abiogenesis: that life could emerge from nonliving molecules. For the new study scientists revisited the 1953 experiments but directed their attention toward electrical activity on a smaller scale said senior study author Dr. Richard Zare the Marguerite Blake Wilbur Professor of Natural Science and professor of chemistry at Stanford University in California. Zare and his colleagues looked at electricity exchange between charged water droplets measuring between 1 micron and 20 microns in diameter. The width of a human hair is 100 microns. “The big droplets are positively charged. The little droplets are negatively charged” Zare told CNN. “When droplets that have opposite charges are close together electrons can jump from the negatively charged droplet to the positively charged droplet.” The researchers mixed ammonia carbon dioxide methane and nitrogen in a glass bulb then sprayed the gases with water mist using a high-speed camera to capture faint flashes of microlightning in the vapor. When they examined the bulb’s contents they found organic molecules with carbon-nitrogen bonds. These included the amino acid glycine and uracil a nucleotide base in RNA. “We discovered no new chemistry; we have actually reproduced all the chemistry that Miller and Urey did in 1953” Zare said. Nor did the team discover new physics he added — the experiments were based on known principles of electrostatics. “What we have done for the first time is we have seen that little droplets when they’re formed from water actually emit light and get this spark” Zare said. “That’s new. And that spark causes all types of chemical transformations.”

  2. Carloslease says:

    Mindful wellness challenges If you’re the type of person who thrives on challenges and pushing your limits this doesn’t mean you need to shy away from wellness challenges altogether. But before diving in take a step back and ask yourself if you’re pursuing the challenge for the right reasons McGregor said. velodrome finance Some people want to try these challenges because they believe something is missing from their life and they’re looking to attain “worth” or receive validation McGregor noted. A good way to assess your motivation is by considering whether the challenge will benefit your health or if it’s about showcasing your accomplishments on social media or some other reason. Before trying any new trend make sure you have the foundation to handle it and be aware of any potential risks McGregor said. For casual runners this might mean signing up for a 5K but building your endurance gradually while incorporating other strength training exercises into your routine. For more intense challenges such as a marathon McGregor encourages people to consult with professionals or a coach who can monitor your progress and condition along the way. Focusing on sustainable habits Both McGregor and Curran emphasize the importance of fostering sustainable health habits before embarking on more extreme challenges. Rather than chasing the idea of being “healthy” McGregor suggests focusing on actual healthful behaviors and starting small. If you’re a highly sedentary person and want to add more movement to your day try doing lunges while brushing your teeth or taking short walks throughout your typical routine.

  3. AnthonyBuh says:

    Scientists redid an experiment that showed how life on Earth could have started. They found a new possibility safepal In the 1931 movie “Frankenstein” Dr. Henry Frankenstein howling his triumph was an electrifying moment in more ways than one. As massive bolts of lightning and energy crackled Frankenstein’s monster stirred on a laboratory table its corpse brought to life by the power of electricity. Electrical energy may also have sparked the beginnings of life on Earth billions of years ago though with a bit less scenery-chewing than that classic film scene. Earth is around 4.5 billion years old and the oldest direct fossil evidence of ancient life — stromatolites or microscopic organisms preserved in layers known as microbial mats — is about 3.5 billion years old. However some scientists suspect life originated even earlier emerging from accumulated organic molecules in primitive bodies of water a mixture sometimes referred to as primordial soup. But where did that organic material come from in the first place? Researchers decades ago proposed that lightning caused chemical reactions in ancient Earth’s oceans and spontaneously produced the organic molecules. Now new research published March 14 in the journal Science Advances suggests that fizzes of barely visible “microlightning” generated between charged droplets of water mist could have been potent enough to cook up amino acids from inorganic material. Amino acids — organic molecules that combine to form proteins — are life’s most basic building blocks and would have been the first step toward the evolution of life.

  4. Edwardsoulp says:

    New design revealed for Airbus hydrogen plane beefy finance In travel news this week: Bhutan’s spectacular new airport the world’s first 3D-printed train station has been built in Japan plus new designs for Airbus’ zero-emission aircraft and France’s next-generation high-speed trains. Grand designs European aerospace giant Airbus has revealed a new design for its upcoming fully electric hydrogen-powered ZEROe aircraft. powered by hydrogen fuel cells. The single-aisle plane now has four engines rather than six each powered by their own fuel cell stack. The reworked design comes after the news that the ZEROe will be in our skies later than Airbus hoped. The plan was to launch a zero-emission aircraft by 2035 but now the next-generation single-aisle aircraft is slated to enter service in the second half of the 2030s. Over in Asia the Himalayan country of Bhutan is building a gloriously Zen-like new airport befitting a nation with its very own happiness index. Gelephu International is designed to serve a brand new “mindfulness city” planned for southern Bhutan near its border with India. In rail travel Japan has just built the world’s first 3D-printed train station which took just two and a half hours to construct according to The Japan Times. That’s even shorter than the whizzy six hours it was projected to take. France’s high-speed TGV rail service has revealed its next generation of trains which will be capable of reaching speeds of up to 320 kilometers an hour nearly 200 mph. The stylish interiors have been causing a stir online as has the double-decker dining car. Finally work is underway in London on turning a mile-long series of secret World War II tunnels under a tube station into a major new tourist attraction. CNN took a look inside.

  5. Freddienow says:

    Some scientists believe that fatty acids such as decanoic acid and dodecanoic acid formed the membranes of the first simple cell-like structures on Earth Pearce said. connext bridge “This is the closest we’ve come to detecting a major biomolecule-related signal — something potentially tied to membrane structure which is a key feature of life” Pearce said via email. “Organics on their own are intriguing but not evidence of life. In contrast biomolecules like membranes amino acids nucleotides and sugars are central components of biology as we know it and finding any of them would be groundbreaking we haven’t yet.” Returning samples from Mars The European Space Agency plans to launch its ExoMars Rosalind Franklin rover to the red planet in 2028 and the robotic explorer will carry a complementary instrument to SAM. The rover LS6 will have the capability to drill up to 6.5 feet 2 meters beneath the Martian surface — and perhaps find larger and better-preserved organic molecules. While Curiosity’s samples can’t be studied on Earth the Perseverance rover has actively been collecting samples from Jezero Crater the site of an ancient lake and river delta all with the intention of returning them to Earth in the 2030s via a complicated symphony of missions called Mars Sample Return. Both rovers have detected a variety of organic carbon molecules in different regions on Mars suggesting that organic carbon is common on the red planet Williams said. While Curiosity and Perseverance have proven they can detect organic matter their instruments can’t definitively determine all the answers about their origins said Dr. Ashley Murphy postdoctoral research scientist at the Planetary Science Institute. Murphy who along with Williams previously studied organics identified by Perseverance was not involved in the new research. “To appropriately probe the biosignature question these samples require high-resolution and high-sensitivity analyses in terrestrial labs which can be facilitated by the return of these samples to Earth” Murphy said.

  6. Josephkal says:

    Greenland’s leader says US officials’ visit is ‘highly aggressive.’ Trump says it’s ‘friendliness not provocation’ extra fi Greenland’s prime minister said a planned visit to the island by US officials including second lady Usha Vance is “highly aggressive” plunging relations to a new low after President Donald Trump vowed to annex the autonomous Danish territory. But despite the backlash Trump has insisted the visit is about “friendliness not provocation” – and claims the US team was “invited.” Vance the wife of US Vice President JD Vance will travel to Greenland this week to watch the island’s national dogsled race and “celebrate Greenlandic culture and unity” according to a statement from the White House. National security adviser Mike Waltz is also expected to visit the territory this week according to a source familiar with the trip. Greenland Prime Minister Mute B. Egede called the US delegation’s trip to the island “highly aggressive” in an interview with Greenlandic newspaper Sermitsiaq on Sunday and raised particular objection to Waltz’s visit. “What is the national security adviser doing in Greenland? The only purpose is to demonstrate power over us” Egede said. “His mere presence in Greenland will no doubt fuel American belief in Trump’s mission — and the pressure will increase.” Trump claimed on Monday that people in Greenland have responded warmly to the US’s recent interest in the territory. “They’re calling us. We’re not calling them. And we were invited over there” he said. “We’re dealing with a lot of people from Greenland that would like to see something happen with respect to them being properly protected and properly taken care of” Trump told reporters following a meeting with his Cabinet. “I think Greenland is going to be something that maybe is in our future” Trump added. The president said he believes Secretary of State Marco Rubio would be traveling to Greenland too. Trump’s idea to annex Greenland has thrown an international spotlight on the territory which holds vast stores of rare earth minerals critical for high-tech industries and has raised questions about the island’s future security as the US Russia and China vie for influence in the Arctic. Trump has repeatedly expressed interest in the US taking the island by force or economic coercion even as Denmark and Greenland have firmly rejected the idea.

  7. Kennethjep says:

    Challenging our perceptions of ‘perfection’ traderjoexyz exchange With health influencers raising the bar for success the wellness space now often feels like a performative space where people strive to showcase peak physical and mental strength. While seeing others’ achievements can be motivating it can also be discouraging if your progress doesn’t match theirs. Each person is chasing the perfect version of themselves — whether it’s a body or a lifestyle — which is dangerous because this is typically an impossible or dangerous version to achieve Curran said. He added that this type of comparison creates a dangerous cycle in which people constantly feel dissatisfied with their own progress. “It’s a fantasy in many ways and once you start chasing after it you constantly find yourself embroiled in a sense of doubt and deficit” he said. Curran also noted that wellness challenges can be particularly damaging for women who struggle with perfectionism as they tend to be bombarded with impossible beauty standards and societal expectations. Renee McGregor a UK-based dietitian who specializes in eating disorders and athlete performance encourages people to approach wellness trends with curiosity and skepticism. That’s because some influencers and celebrities could be promoting products because there’s a financial benefit for them. “The thing to ask yourself about the person you’re taking advice from is what do they gain from it?” McGregor said. “If they are going to gain financially then you know that they could be willing to sell you a lie.” Whether you want to try a new challenge or product that promises amazing results McGregor suggests doing your research and seeking diverse perspectives including consulting with doctors when possible.

  8. JamesSep says:

    Wellness perfectionism doesn’t exist. Focus on these sustainable habits sushiswap exchange ou’re scrolling through your phone when you stumble upon the next viral trend: an influencer claiming that following their incredibly strict diet will help you achieve their jaw-dropping physique. Or you see a fresh-faced runner swearing you can run a marathon without any training — just like they did. Whether or not you’re actively searching for wellness advice it’s nearly impossible to avoid hearing about the latest health craze making bold guarantees of transformation. As you wonder if these claims hold any truth you might also question why people often feel motivated to dive into intense challenges — when seemingly simple habits such as getting enough sleep or eating more vegetables often feel much harder to tackle. Many of us are drawn to these extreme challenges because we’re craving radical change hoping it will help prove something to ourselves or to others experts say. “We always see these kinds of challenges as opportunities for growth particularly if we’re in a phase of our life where we’ve let ourselves go” said Dr. Thomas Curran associate professor of psychology at the London School of Economics and Political Science and an expert on perfectionism. “Maybe we feel that we need to be healthier or we just had a breakup or major life event.” With social media amplifying these movements it’s easy to see why people are increasingly drawn to the idea of achieving the “perfect” version of themselves. But before jumping into a new wellness challenge it’s important to take a moment reflect on your goals and consider where you’re starting from.

  9. Jessebup says:

    Josh Giddey hits halfcourt buzzer-beater over LeBron James to cap wild finale as the Bulls stun the Lakers quickswap exchange Josh Giddey hit a game-winning halfcourt buzzer-beater over LeBron James as the Chicago Bulls stunned the Los Angeles Lakers in one of the wildest endings to an NBA game you are ever likely to see. Trailing 115-110 with 12.6 seconds remaining Giddey’s inbound pass found Nikola Vucevic who pushed the ball to a wide-open Patrick Williams for a corner three-pointer. James then fluffed the Lakers inbound pass from the baseline allowing Giddey to steal the ball and find Coby White for a second Bulls triple in quick succession to put Chicago up 116-115 with 6.1 seconds remaining. Austin Reaves then made a driving layup to put the Lakers ahead 117-116 with 3.3 seconds left but the game wasn’t done yet. With no timeouts remaining Giddey inbounded the ball to Williams from the baseline got the pass back took one dribble and launched a shot from beyond halfcourt. Supporters in the stands seemed frozen in anticipation as the ball sailed through the air and the United Center then erupted as it fell through the net. After the dramatic win Giddey found himself being swarmed by his teammates. “Special moment to do it with these guys this team” Giddey said per ESPN. “We’ve shown over the last month to six weeks that we can beat anybody. The way we play the game I think it wears people down. “We get up and down. We run. We put heat on them to get back. A lot of veteran teams don’t particularly want to get back and play in transition.” Giddey later told the Bulls broadcast that he’d “never made a game-winner before.” The ending capped an incredible couple of games for the Lakers who had themselves won their last game against the Indiana Pacers on Wednesday with a buzzer-beating tip-in from James.

  10. JasonLutle says:

    Water and life
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    Lightning is a dramatic display of electrical power, but it is also sporadic and unpredictable. Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life — a fact that has cast doubt on such theories in the past, Zare said.

    Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life.

    “Microdischarges between obviously charged water microdroplets make all the organic molecules observed previously in the Miller-Urey experiment,” Zare said. “We propose that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life.”

    However, even with the new findings about microlightning, questions remain about life’s origins, he added. While some scientists support the notion of electrically charged beginnings for life’s earliest building blocks, an alternative abiogenesis hypothesis proposes that Earth’s first amino acids were cooked up around hydrothermal vents on the seafloor, produced by a combination of seawater, hydrogen-rich fluids and extreme pressure.

    Researchers identified salt minerals in the Bennu samples that were deposited as a result of brine evaporation from the asteroid’s parent body. In particular, they found a number of sodium salts, such as the needles of hydrated sodium carbonate highlighted in purple in this false-colored image – salts that could easily have been compromised if the samples had been exposed to water in Earth’s atmosphere.

    Related article
    Yet another hypothesis suggests that organic molecules didn’t originate on Earth at all. Rather, they formed in space and were carried here by comets or fragments of asteroids, a process known as panspermia.

    “We still don’t know the answer to this question,” Zare said. “But I think we’re closer to understanding something more about what could have happened.”

    Though the details of life’s origins on Earth may never be fully explained, “this study provides another avenue for the formation of molecules crucial to the origin of life,” Williams said. “Water is a ubiquitous aspect of our world, giving rise to the moniker ‘Blue Marble’ to describe the Earth from space. Perhaps the falling of water, the most crucial element that sustains us, also played a greater role in the origin of life on Earth than we previously recognized.”

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