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  2. Paper chromatography - Wikipedia

    en.wikipedia.org/wiki/Paper_chromatography

    The difference between TLC and paper chromatography is that the stationary phase in TLC is a layer of adsorbent (usually silica gel, or aluminium oxide), and the stationary phase in paper chromatography is less absorbent paper. A paper chromatography variant, two-dimensional chromatography, involves using two solvents and rotating the paper 90 ...

  3. Two-dimensional chromatography - Wikipedia

    en.wikipedia.org/wiki/Two-dimensional_chromatography

    Two-dimensional chromatography is a type of chromatographic technique in which the injected sample is separated by passing through two different separation stages. Two different chromatographic columns are connected in sequence, and the effluent from the first system is transferred onto the second column. [ 1 ]

  4. Precision Array for Probing the Epoch of Reionization

    en.wikipedia.org/wiki/Precision_Array_for...

    PAPER in Green Bank has evolved over a few years from exploring basic systematics in a rudimentary four-element array to the more comprehensive system performance testing with the thirty-two element array that is currently deployed there. PAPER activities at the NRAO site near Green Bank, WV began in 2005 with the deployment of a 4-antenna ...

  5. 30 Of The Funniest Black Friday Memes To Check Out ... - AOL

    www.aol.com/90-funny-relatable-black-friday...

    Forecasters at the National Retail Federation predict that holiday retail sales in November and December of this year will grow between 2.5% and 3.5%, setting a record between $979.5 billion and ...

  6. In 'Carpool Karaoke' holiday episode, Chappell Roan's parents ...

    www.aol.com/entertainment/carpool-karaoke...

    The two drive through a classic American landscape with Roan's parents in the backseat. During a rendition of " Pink Pony Club ," a song that features lyrics about her mother heavily, both of Roan ...

  7. Drinking certain types of coffee can bring some health ... - AOL

    www.aol.com/drinking-certain-types-coffee-bring...

    Recent research reveals that caffeine has health benefits for most moderate coffee drinkers. Here are the pros and cons of drinking certain coffees, with expert insights and advice.

  8. Array slicing - Wikipedia

    en.wikipedia.org/wiki/Array_slicing

    A = round (rand (3, 4, 5) * 10) % 3x4x5 three-dimensional or cubic array > A (:,:, 3) % 3x4 two-dimensional array along first and second dimensions ans = 8 3 5 7 8 9 1 4 4 4 2 5 > A (:, 2: 3, 3) % 3x2 two-dimensional array along first and second dimensions ans = 3 5 9 1 4 2 > A (2: end,:, 3) % 2x4 two-dimensional array using the 'end' keyword ...

  9. Play Spades Online for Free - AOL.com

    www.aol.com/games/play/masque-publishing/spades

    Spades is all about bids, blinds and bags. Play Spades for free on Games.com alone or with a friend in this four player trick taking classic.