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Results 41 - 50 of 636 for DNA
  • Article - 15 Feb 2002
    Every year, 200 million tungsten bullets are produced, each using an ounce of tungsten. That amounts to over 5500 tons or one-eighth of the current annual tungsten consumption across the globe.
  • Article - 21 Aug 2001
    Approximately three times more expensive than SMC. Relative advantages, disadvantages and applications are listed together with a table of typical properties.
  • Article - 29 Jul 2001
    Black was the first person to recognize magnesium (Mg) as an element in 1755. Later, in 1808, Davy isolated this element by evaporating mercury from a magnesium amalgam.
  • Article - 28 Jul 2001
    Tungsten has the highest melting point (3410°C) and the highest tensile strength at temperatures over 1650°C of all the metals. It is used for lamp filaments, x-ray targets, aerospace applications and...
  • Article - 28 Jul 2001
    Although lead occurs as such in nature, it is rare. Lead is chiefly obtained from galena (PbS) through the process of roasting.
  • Article - 23 Jul 2001
    Uranium is a heavy, silver-white metal resembling nickel. It is malleable, ductile, slightly paramagnetic and pyrophoric when finely divided. Its main uses are as a nuclear fuel, radioactive isotope...
  • Article - 20 Jul 2001
    Copper is tough and ductile, but is valuable due its ability to conduct electricity. While it is suited to many applications most centre around its excellent electrical conductivity (e.g. busbars and...
  • Article - 30 Jun 2015
    The first biological molecule observed using atomic force microscopy (AFM) was DNA. For the study DNA structure, dynamics, topology and interaction with proteins, the primary technique for imaging...
  • News - 9 Oct 2008
    In the tiny realm of nanotechnology, scientists have used a wide variety of materials to build atomic scale structures. But just as in the construction business, nanotechnology researchers can often...
  • News - 10 Nov 2009
    In work that someday may lead to the development of novel types of nanoscale electronic devices, an interdisciplinary team of researchers at the California Institute of Technology has combined...