Links for 26th July 2009

Fresh from the clogged tubes of teh intarwubs…

  1. PhysicsCentral: Buzz Blog

    "Extracting clean, fresh water from salty water requires energy. The reverse processmixing fresh water and salty waterreleases energy. Physicists began exploring the idea of extracting energy from mixing fresh and salty waters, a process known as salination, in the 1970s. They found that the energy released by the worlds freshwater rivers as they flowed into salty oceans was comparable to "each river in the world ending at its mouth in a waterfall 225 meters [739 feet] high," according to a 1974 research paper in the journal Science. But those who have chased the salination dream have collided with technological barriers."

    Tagged with: technologyenergygenerationsalinationsalt-waternew-southseasustainable

  2. Evolution machine speeds up search for better bugs

    "MAGE relies on the tendency of cells to incorporate little bits of laboratory made DNA into their dividing chromosomes. Researchers can customise those bits so they modify specific genes and even parts of genes.

    This lets scientists exert as much or as little control over the mutations as they see fit. […]

    Engineering vitamin-producing bacteria isn't the only use for the new technique, Isaacs says. "It will immediately decrease the time it will take to improve the efficiency and production of virtually any compound that's generated, right now, in E. coli and looking beyond into other types of organisms as well.""

    Tagged with: geneticmutationengineeringevolutionbiologyresearch

  3. WordPress: Detect if a post has at least one image

    Does what it says on the tin.

    Tagged with: wordpresspostimagesdetectionphpcodewebdev

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