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Chemiluminescence in aqueous system is mainly caused by redox reactions. [4] Chemiluminescence after a reaction of hydrogen peroxide and luminol. Luminol in an alkaline solution with hydrogen peroxide in the presence of iron or copper, [5] or an auxiliary oxidant, [6] produces 3-aminophtalate in an excited state, which exhibits ...
The sensitivity of the reagent may become altered after the recommended time period. [11] Microtox Osmotic Adjustment Solution (MOAS) is a nontoxic solution that is made up of 22% sodium chloride and ultra-pure water. This solution is added to a sample to adjust the osmotic pressure to approximately 2% NaCl. [11]
Pyridinium dichromate (Cornforth reagent) converts primary and secondary alcohols to ketones Raney nickel: an alternative catalyst for the hydrogenation of vegetable oils; in organic synthesis, used for desulfurization Sakaguchi's Reagent: Detects the presence of arginine Samarium(II) iodide (Kagan Reagent) a powerful reducing agent Silver oxide
Electrochemiluminescence or electrogenerated chemiluminescence (ECL) is a kind of luminescence produced during electrochemical reactions in solutions. In electrogenerated chemiluminescence, electrochemically generated intermediates undergo a highly exergonic reaction to produce an electronically excited state that then emits light upon relaxation to a lower-level state.
Guaiacol is also a useful reagent for the quantification of peroxidases, as in the presence of hydrogen peroxide these enzymes will catalyse with it the formation of tetraguaiacol, [14] a coloured compound that can be quantified by its absorbance at 420–470 nm, following the equation: 4 guaiacol (colorless) + 2 H 2 O 2 → tetraguaiacol ...
The artificial solution described by Dennis Hoagland in 1933, [1] known as Hoagland solution (0), has been modified several times, mainly to add ferric chelates to keep iron effectively in solution, [6] and to optimize the composition and concentration of other trace elements, some of which are not generally credited with a function in plant nutrition. [7]
The reagent is incubated with the sample and absorbance of the product form after a series of oxidation reactions is then measured at a wavelength of 560 nm. The reagent itself is an aqueous solution of ferrous ammonium sulfate, sorbitol, sulfuric acid and xylenol orange.
Phosphorus is an essential macromineral for plants, which is studied extensively in edaphology to understand plant uptake from soil systems. Phosphorus is a limiting factor in many ecosystems ; that is, the scarcity of phosphorus limits the rate of organism growth.