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  2. Nitrite test - Wikipedia

    en.wikipedia.org/wiki/Nitrite_test

    A nitrite test is a standard component of a urinary test strip. A positive test for nitrites in the urine is called nitrituria. This test is commonly used in diagnosing urinary tract infections (UTIs). A positive nitrite test indicates that the cause of the UTI is a Gram-negative organism, most commonly Escherichia coli. The reason for nitrites ...

  3. Comparison of CRT, LCD, plasma, and OLED displays - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_CRT,_LCD...

    Screen-door effects are more noticeable than LCD when up close, or on larger sizes. [53] New models are no longer produced. Colored sub-pixels may age at different rates, leading to a color shift, although some models will scan pixels to even out wear and prevent this shift. [54] Sensitive to UV light from direct sunlight.

  4. EIA 1956 resolution chart - Wikipedia

    en.wikipedia.org/wiki/EIA_1956_resolution_chart

    Recreation of Telefunken Test Card T05 A Philips "Starenkasten" 1952 TV set, displaying the Telefunken T05 test card. In continental Europe, [42] another variation known as Telefunken Test Card T05 [43] was used. It had five diagonal bars on the top left of the centre white circle and different resolution wedges reminiscent of the RMA 1946 ...

  5. Test card - Wikipedia

    en.wikipedia.org/wiki/Test_card

    Test cards typically contain a set of patterns to enable television cameras and receivers to be adjusted to show the picture correctly (see SMPTE color bars).Most modern test cards include a set of calibrated color bars which will produce a characteristic pattern of "dot landings" on a vectorscope, allowing chroma and tint to be precisely adjusted between generations of videotape or network feeds.

  6. How do I take a screenshot? - AOL Help

    help.aol.com/articles/how-do-i-take-a-screenshot

    Most operating systems have a built in feature that allows you to take a picture of what is on your screen. If you're asked to provide a screenshot when contacting AOL about an issue, you can use these steps for the most common operating systems. If you're using a different device, contact the manufacturer of the device for specific steps.

  7. Universal Electronic Test Chart - Wikipedia

    en.wikipedia.org/wiki/Universal_Electronic_Test...

    Recreation of the UEIT-2 test card ТИТ-0249, monochrome predecessor of the UEIT test card. UEIT - Universal Electronic Test Chart (russian: УЭИТ - Универсальная электронная испытательная таблица) is a Soviet/Russian test card, designed to test TVs operating in the analogue SECAM colour standard ...

  8. Philips circle pattern - Wikipedia

    en.wikipedia.org/wiki/Philips_circle_pattern

    From 1 March 1975, the Dutch public broadcasting system also started to use the Philips circle pattern on its TV channels, replacing the monochrome RMA 1946 Resolution Chart, the electronic monochrome chequerboard test card generated by a Philips GM 2671/50 video signal generator, [141] the Philips PM5552 early colour test card, and after the ...

  9. Test Card F - Wikipedia

    en.wikipedia.org/wiki/Test_Card_F

    Off-air screen capture of BBC Test Card F, as seen on BBC1 between 17 February 1991 and 4 October 1997. Test Card F is a test card that was created by the BBC and used on television in the United Kingdom and in countries elsewhere in the world for more than four decades.