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  2. Clearblue - Wikipedia

    en.wikipedia.org/wiki/Clearblue

    The test was a three-step process using a dipstick and small tray. [4] In 1988, Clearblue launched the first one-step pregnancy test with the invention of lateral flow technology. [3] [5] This one-step test gave a result in 3 minutes, subsequently reduced to a 1-minute result when Clearblue introduced the world’s first one-minute home ...

  3. Benedict's reagent - Wikipedia

    en.wikipedia.org/wiki/Benedict's_reagent

    A positive result of Benedict's test is indicated by a color change from clear blue to brick-red with a precipitate. Generally, Benedict's test detects the presence of aldehyde groups, alpha-hydroxy-ketones , and hemiacetals , including those that occur in certain ketoses .

  4. List of reagent testing color charts - Wikipedia

    en.wikipedia.org/wiki/List_of_reagent_testing...

    It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2] For this reason it is essential to use multiple different tests to show all adulterants.

  5. Unipath - Wikipedia

    en.wikipedia.org/wiki/Unipath

    In 1985 they released and started to manufacture the first in their line of home pregnancy test kits marketed under the Clearblue brand. [1] The name is related to the fact that the test produced a blue marker line as a positive (pregnant) result and that it is 'clear' and simple to use.

  6. What should you do if you’re still testing positive for COVID ...

    www.aol.com/news/still-testing-positive-covid-19...

    While most people will clear the virus and get a negative antigen test result within 10 days, some people may keep testing positive for longer than that, experts tell TODAY.com.

  7. Swiss Precision Diagnostics - Wikipedia

    en.wikipedia.org/wiki/Swiss_Precision_Diagnostics

    Swiss Precision Diagnostics GmbH is a Swiss medical diagnostic company, that produces Clearblue-branded pregnancy testing equipment. History The ...

  8. False positives and false negatives - Wikipedia

    en.wikipedia.org/wiki/False_positives_and_false...

    The false positive rate (FPR) is the proportion of all negatives that still yield positive test outcomes, i.e., the conditional probability of a positive test result given an event that was not present. The false positive rate is equal to the significance level. The specificity of the test is equal to 1 minus the false positive rate.

  9. What Really Causes a False Positive COVID-19 Test? Experts ...

    www.aol.com/lifestyle/false-positive-covid-19...

    False positive COVID-19 tests—when your result is positive, but you aren’t actually infected with the SARS-CoV-2 virus—are a real, if unlikely, possibility, especially if you don’t perform ...