View post tag: USS Columbus USS Columbus returns home Training & Education The crew of Los Angeles-class fast-attack submarine USS Columbus (SSN 762) was welcomed home by friends and family awaiting their return at the historic submarine piers on Joint Base Pearl Harbor-Hickam, Sept. 1.Columbus successfully completed a six-month Western Pacific deployment while conducting operations in support of national security.“I cannot express in mere words, how proud I am of my crew,” said Cmdr. Albert A Alarcon, a native of Lancaster, California, and Columbus commanding officer. “Their commitment to each other and to our success across every forward-deployed submarine mission area was beyond exemplary.”While on deployment, 40 submariners earned the right to wear the submarine warfare insignia, also known as “dolphins.”About 70 percent of the crew rotated out of the Columbus following her last deployment, but that didn’t stop the crew from coming together to complete the mission said Machinist Mate (Weapons) Master Chief (SS) Leonard Anderson, a native of Oakland, California and Columbus chief of the boat.“The real reward for came as the crew bonded and conducted a wide spectrum of submarine operations in challenging environments,” said Anderson. “For many of the crew, this was their first deployment, so this completed deployment is a testament to the crew’s hard work and perseverance.”During the six-month deployment, Columbus performed three national tasking periods, two theater operation periods, and a multinational exercise. Columbus also enjoyed four port visits, including Singapore and Guam.“The amount of buy-in the crew exhibited was outstanding,” said Anderson. “Every man did his part to accomplish qualifications and ultimately meet all tasking.”While on deployment Columbus traveled over 34,000 nautical miles crossing the equator twice making 135 Columbus crew members new shellbacks.After all the Columbus accomplished on deployment, the crew was happy to be home and reflected on what made the deployment successful.Columbus is one of the most advanced undersea vessels in the world, and its missions include deployment of special forces, minelaying, precision land attack, or anti-submarine or surface warfare while remaining undetected. Share this article Back to overview,Home naval-today USS Columbus returns home View post tag: US Navy September 4, 2017
while staticky-sounding “growls” are used for courtship, Published in Behavioral Ecology, 2013 11:40 am Related News Actress Yami Gautam, The Mizoram Journalists Association and the the Mizoram Bar Association in their responses to the Study Group on Prohibition suggested that the dry law should be lifted and liquor should not be prohibited but properly regulated as in other states.34,s Christmas gift from Russell.K. infected one of the smallest and most abundant photosynthetic microbes on the planet—Synechococcus—with cyanophages from either the English Channel or the Red Sea They fed the bacteria baking soda or sodium bicarbonate which served as a source of CO2 By using radioactive carbon in the baking soda the researchers were able to track precisely how much carbon dioxide the bacteria were sequestering—or “fixing”—over time Several hours after the scientists introduced the viruses carbon fixation stalled they report this month in Current Biology Bacteria infected with the Red Sea and English Channel phages fixed 48 and 23 times less carbon respectively than uninfected hosts Carbon fixation fell no matter how much light was hitting the bacteria Critically the team found that the reduction in carbon fixation didn’t stem from changes early in the photosynthesis process when cyanobacteria use sunlight to generate energy Infected cells converted sunlight into energy just as well as uninfected cells Instead it appeared that the viruses interfered during the later stages when the bacteria normally use the energy from the sun to fix inorganic carbon by transforming it into sugars By redirecting that energy toward their own reproduction the viruses block the bacteria’s ability to fix carbon “Viruses are just selfish machines” says Dave Scanlan a marine microbiologist at the University of Warwick and one of the study’s senior authors “The energy that’s being made is being siphoned off by the virus to make more of itself” The team estimates that the cyanophages are preventing the fixation of between 20 million and 539 billion metric tons of carbon each year At its upper end that would be equivalent to about 10% of the carbon fixed every year by the entire ocean or 5% of the carbon fixed globally The true number depends on how many bacteria are infected at any one time—something scientists don’t yet have a good handle on Previous studies indicate that anywhere from 1% to 60% of cyanobacteria in the ocean could be infected at once There are other questions as well For example how might different viruses affect other species of cyanobacteria in the open ocean “This is a lab study of a very specific virus and a very specific host cell” Martiny says “How that translates to an ocean environment I think is a big unknown” The findings says study author Andrew Millard also at the University of Warwick will help scientists better understand the full impact of cyanophages on the environment While in this particular case less carbon fixation would seem to tip the scales toward more CO2 and more warming it’s just one aspect of what viruses are doing in the ocean “Whether or not it’s good or bad it’s part of the system” he says “And we have to understand the system if we ever want to understand global warming” suggesting that the viruses—known as cyanophages—might be changing how the bacteria process carbon. especially the sodium and also some potassium.
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