nitrites test

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• test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

• Griess test — The Griess test is a chemical analysis test which detects the presence of organic nitrite compounds. The Griess diazotization reaction on which the Griess reagent relies was first described in 1858 by Peter Griess. MethodNitrite is detected and… …   Wikipedia

• Plant tissue test — The nutrient content of a plant can be assessed by testing a sample of tissue from that plant. These tests are important in agriculture since fertilizer application can be fine tuned if the plants nutrient status is known. Nitrogen most commonly… …   Wikipedia

• Nitrite test — A nitrite test is a chemical test used to determine the presence of nitrite ion in solution. A common nitrite test can be performed by adding 4 M sulfuric acid to the sample until acidic, and then adding 0.1 M iron(II) sulfate to the solution. A… …   Wikipedia

• nitrite test — 1. (for nitrites in saliva) to the saliva add 1 or 2 drops of sulfuric acid, a few drops of potassium iodide solution, and some starch paste; a blue color indicates nitrites. 2. a test for nitrites in any fluid; see specific tests, including… …   Medical dictionary

• Drug test — For other uses, see Drug testing (disambiguation). Drug test Diagnostics To minimize opportunities for tampering, a direct line of sight between the observer and the specimen bottle must be maintained during collection of a urine sample …   Wikipedia

• Griess test —    A chemical test for the detection of nitrites. It is used by the firearms examiner to develop patterns of gunpowder residues (nitrites) around bullet holes …   Forensic science glossary

• Griess test — 1. (for nitrate reducing bacteria in a fluid) a formerly common test in which sulfuric acid and an indicator were added to a dilute solution and color change was assessed. 2. the same name is now applied to nitrite tests for bacteriuria in which… …   Medical dictionary

• Walker test —    The original chemical test for the detection of the spatial distribution of nitrites in gunpowder residue …   Forensic science glossary

• Recherche de la nitrate reductase — Recherche de la nitrate réductase La nitrate réductase est une enzyme (un complexe enzymatique en réalité) qui est capable de catalyser la réaction de réduction des nitrates ( ). Sommaire 1 Principe 2 Mise en évidence 2.1 …   Wikipédia en Français

• Recherche de la nitrate réductase — La nitrate réductase est une enzyme (un complexe enzymatique en réalité) qui est capable de catalyser la réaction de réduction des nitrates ( ). Sommaire 1 Principe 2 Mise en évidence 2.1 Principe …   Wikipédia en Français