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