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Melzer's reagent can be used to test whether spores are amyloid, nonamyloid, or dextrinoid . Spores that stain bluish-gray to bluish-black are amyloid. Spores that stain brown to reddish-brown are dextrinoid. This test is normally performed on white spored mushrooms. If the spores are not light colored, a change will not be readily apparent.
Further chemical tests are needed to prove that the substance is blood. Confirmatory tests are the tests required to confirm the analysis. Confirmatory tests cost more than simpler presumptive tests so presumptive tests are often done to see if confirmatory tests are necessary. Similarly, in medicine, a presumptive diagnosis identifies the ...
The University of Pennsylvania Smell Identification Test (UPSIT) is a test that is commercially available for smell identification to test the function of an individual's olfactory system . Known for its accuracy among smell identification tests it is considered to be one of the most reliable (r=.94) and trusted. [1]
The Sargan–Hansen test or Sargan's test is a statistical test used for testing over-identifying restrictions in a statistical model. It was proposed by John Denis Sargan in 1958, [1] and several variants were derived by him in 1975. [2] Lars Peter Hansen re-worked through the derivations and showed that it can be extended to general non ...
The Zeisel determination or Zeisel test is a chemical test for the presence of esters or ethers in a chemical substance. It is named after the Czech chemist Simon Zeisel (1854–1933). In a qualitative test a sample is first reacted with a mixture of acetic acid and hydrogen iodide in a test tube.
The detection of genetically modified organisms in food or feed is possible by biochemical means. It can either be qualitative, showing which genetically modified organism (GMO) is present, or quantitative, measuring in which amount a certain GMO is present. Being able to detect a GMO is an important part of GMO labeling, as without detection ...
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The mainstay of malaria diagnosis has been the microscopic examination of blood, utilizing blood films. [1] Although blood is the sample most frequently used to make a diagnosis, both saliva and urine have been investigated as alternative, less invasive specimens. [2] More recently, modern techniques utilizing antigen tests or polymerase chain ...