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Simple phenol (Carbolic acid) is almost colourless in aqueous solution but Naphthols forms pinkish or purple solutions.
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How can you calculate Gallic acid equivalents for total phenolic constituents?
The total phenolic content can be calculated as gallic acid equivalent (GAE) by the following equation: T=CxV/M. T is the total phenolic content in mg·g-1 of the extracts as GAE, C is the concentration of gallic acid established from the calibration curve in mg·ml-1, V is the volume of the extract solution in ml and M is the weight of the extract in g.
What color is Lugol's solution prior to changing color?
Lugol's solution is a solution of iodine (1-5%) and potassium iodide in water. So the solution should have the pale color of iodine and the color should be pale (light) brown.
What is the color of iron (III) chloride solution?
The color of iron (III) chloride solution is brown.
Properties of phenolic resin why we prefer phenolic over epoxy resin?
Phenolic resin is less costly and easier to work with than epoxy. Many epoxy resin systems have a very short pot life.
What color is the bromthymol blue solution before and after you exhaled into it?
The color of the bromthymol blue solution or blue btb is yellow after you exhaled into it..:)
Why protein change color with million's reagent?
Millon's solution detects phenolic compounds, which includes proteins and some non-proteins. Phenolic compounds are classified as having a hydroxyl group, or an OH, bonded directly to a hydrocarbon.
What is phenolic yellowing?
Phenol type antioxidant be oxidated to hydroquinones type structure. The color appear as yellow or dark-brown
What is a phenolic polymer?
Phenolic polymer = made of phenylpropanoid subunits (called monolignols) which are derived from phenylalanine
What is biphenol a?
A biphenol is any compound which has two phenolic hydroxy groups, such a phenolic derivative of biphenyl.
How can you calculate Gallic acid equivalents for total phenolic constituents?
The total phenolic content can be calculated as gallic acid equivalent (GAE) by the following equation: T=CxV/M. T is the total phenolic content in mg·g-1 of the extracts as GAE, C is the concentration of gallic acid established from the calibration curve in mg·ml-1, V is the volume of the extract solution in ml and M is the weight of the extract in g.
What color is Lugol's solution prior to changing color?
Lugol's solution is a solution of iodine (1-5%) and potassium iodide in water. So the solution should have the pale color of iodine and the color should be pale (light) brown.
What kind of phenolic resins resol or novolac are suitable for making phenolic foam?
i make the phenolic foam out of both of them in the same formula it works out fairly well but i am engineering it to get top performance out of the polymers.
What is an arylsulfotransferase?
An arylsulfotransferase is a sulfotransferase enzyme which transfers a sulfate group from phenolic sulfate esters to a phenolic acceptor substrate.
What is an arylsulphotransferase?
An arylsulphotransferase is a a sulphotransferase enzyme which transfers a sulphate group from phenolic sulphate esters to a phenolic acceptor substrate.
What is the color of iron (III) chloride solution?
The color of iron (III) chloride solution is brown.
Properties of phenolic resin why we prefer phenolic over epoxy resin?
Phenolic resin is less costly and easier to work with than epoxy. Many epoxy resin systems have a very short pot life.
What color is a neutral solution?
Any color is possible.
