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  2. Richard Lenski - Wikipedia

    en.wikipedia.org/wiki/Richard_Lenski

    The 12 evolving E. coli populations on June 25, 2008 The E. coli long-term evolution experiment is an ongoing study in experimental evolution led by Richard Lenski that has been tracking genetic changes in 12 initially identical populations of asexual Escherichia coli bacteria since 24 February 1988. [ 13 ]

  3. E. coli long-term evolution experiment - Wikipedia

    en.wikipedia.org/wiki/E._coli_long-term...

    The 12 E. coli LTEE populations on June 25, 2008. [1]The E. coli long-term evolution experiment (LTEE) is an ongoing study in experimental evolution begun by Richard Lenski at the University of California, Irvine, carried on by Lenski and colleagues at Michigan State University, [2] and currently overseen by Jeffrey Barrick at the University of Texas at Austin. [3]

  4. Bacteriological water analysis - Wikipedia

    en.wikipedia.org/wiki/Bacteriological_water_analysis

    The laboratory procedure involves making serial dilutions of the sample (1:10, 1:100, 1:1000, etc.) in sterile water and cultivating these on nutrient agar in a dish that is sealed and incubated. Typical media include plate count agar for a general count or MacConkey agar to count Gram-negative bacteria such as E. coli. Typically one set of ...

  5. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions. Soft water also extends the lifetime of plumbing by reducing or eliminating scale build-up in pipes

  6. Escherichia coli in molecular biology - Wikipedia

    en.wikipedia.org/wiki/Escherichia_coli_in...

    In 1885, Theodor Escherich, a German pediatrician, first discovered this species in the feces of healthy individuals and called it Bacterium coli commune because it is found in the colon and early classifications of Prokaryotes placed these in a handful of genera based on their shape and motility (at that time Ernst Haeckel's classification of Bacteria in the kingdom Monera was in place [3]).

  7. Pulsed-power water treatment - Wikipedia

    en.wikipedia.org/wiki/Pulsed-power_water_treatment

    Pulsed-power water treatment is the process of using pulsed, electro-magnetic fields into cooling water to control scaling, biological growth, and corrosion. The process does not require the use of chemicals and helps eliminate environmental and health issues associated with the use and life-cycle management of chemicals used to treat water. [ 1 ]

  8. Transformation efficiency - Wikipedia

    en.wikipedia.org/wiki/Transformation_efficiency

    The number of viable cells in a preparation for a transformation reaction may range from 2×10 8 to 10 11; most common methods of E. coli preparation yield around 10 10 viable cells per reaction. The standard plasmids used for determination of transformation efficiency in Escherichia coli are pBR322 or other similarly sized or smaller vectors ...

  9. Luria–Delbrück experiment - Wikipedia

    en.wikipedia.org/wiki/Luria–Delbrück_experiment

    In their experiment, Luria and Delbrück inoculated a small number of bacteria (Escherichia coli) into separate culture tubes. After a period of growth, they plated equal volumes of these separate cultures onto agar containing the T1 phage (virus). If resistance to the virus in bacteria were caused by an induced activation in bacteria i.e. if ...

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