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  2. Marquis reagent - Wikipedia

    en.wikipedia.org/wiki/Marquis_reagent

    The above photo shows the positive results of the number 2 Marquis reagent presumptive drug test when used with a sample of opium. It is the primary presumptive test used in Ecstasy reagent testing kits. It can also be used to test for such substances as opiates (e.g. codeine, heroin), and phenethylamines (e.g. 2C-B, mescaline).

  3. Diagnosis of HIV/AIDS - Wikipedia

    en.wikipedia.org/wiki/Diagnosis_of_HIV/AIDS

    Confirming the test result (i.e., by repeating the test, if this option is available) could reduce the ultimate likelihood of a false positive to about 1 result in 250,000 tests given. The sensitivity rating, likewise, indicates that, in 1,000 test results of HIV infected people, 3 will actually be a false negative result.

  4. Presumptive and confirmatory tests - Wikipedia

    en.wikipedia.org/wiki/Presumptive_and...

    Most people who take a drug test take a presumptive test, cheaper and faster than other methods of testing. However, it is less accurate and can render false results. The FDA recommends for confirmatory testing to be conducted and the placing of a warning label on the presumptive drug test: "This assay provides only a preliminary result.

  5. Forensic serology - Wikipedia

    en.wikipedia.org/wiki/Forensic_serology

    A positive result induces a color change to pink. [4] Similar to the Kastle-Meyer test, a hemastix is also a catalytic test simplified to a specialized strip where the blood sample is extracted by a wet swab and placed directly on the hemastix. [7] A positive result induces a colour change from yellow to dark green. [7]

  6. Direct analysis in real time - Wikipedia

    en.wikipedia.org/wiki/Direct_analysis_in_real_time

    In mass spectrometry, direct analysis in real time (DART) is an ion source that produces electronically or vibronically excited-state species from gases such as helium, argon, or nitrogen that ionize atmospheric molecules or dopant molecules. The ions generated from atmospheric or dopant molecules undergo ion-molecule reactions with the sample ...

  7. NFL Week 11 winners, losers: Bengals' season might not be ...

    www.aol.com/nfl-week-11-winners-losers-110921142...

    The Bengals have had a frustrating season in which just about every close game did not go their way. That’s not hyperbole; Cincinnati is now 1-6 in games decided by seven points or fewer.

  8. Simon's reagent - Wikipedia

    en.wikipedia.org/wiki/Simon's_reagent

    Simon's reagent is used as a simple spot-test to presumptively identify alkaloids as well as other compounds. It reacts with secondary amines like MDMA and methamphetamine to give a blue solution. Uses

  9. Rapid diagnostic test - Wikipedia

    en.wikipedia.org/wiki/Rapid_diagnostic_test

    Rapid strep test kit. A rapid diagnostic test (RDT) is a medical diagnostic test that is quick and easy to perform. RDTs are suitable for preliminary or emergency medical screening and for use in medical facilities with limited resources. They also allow point-of-care testing in primary care for things that formerly only a laboratory test could ...