Biology

What Is Bial’s Test? Bial’s test named after a German physician Manfred Bial, is a chemical test for detection of presence of pentoses. Bial’s test reagent contains concentrated Hydrochloric acid (HCl) as a dehydrating acid, orcinol and traces of ferric chloride as condensation reagent. A pentose if present in a given sample, will be dehydrated … Read more Bial’s Test: Objective, Principle, Procedure, Reagent And Results Interpretation

What Is Seliwanoff’s Test? Seliwanoff’s test is a chemical test which differentiates between Aldose and ketose sugars. If the sugar contains a ketone group, it is a ketose whereas if it contains an aldehyde group, it is an Aldose. This test is much like Bial’s test; it relies on the principle that, when heated, ketoses … Read more Seliwanoff’s Test: Principle, Reagent Preparation, Procedure And Results Interpretation

Microscope Description A microscope is a laboratory instrument used to examine objects that are too small to be seen by the naked eye. In other words, it enlarges images of small objects. Invented by a Dutch spectacle maker in the late 16th century, light microscopes use lenses and light to magnify images.  Generally a microscope … Read more 22 Parts Of a Microscope With Their Function And Labeled Diagram

What Is Nitroprusside Test? Nitroprusside test is a biochemical test used for the detection of the free-SH groups in amino acids or the cysteine amino acid in a protein. This test uses sodium Nitroprusside reagents and ammonia solution. Nitroprusside is a complex anion consisting of an octahedral ferrous center which is surrounded by five tightly … Read more Nitroprusside Test: Principle, Reaction, Procedure And Results Interpretation

What Is Hopkins Cole Test? Hopkins Cole Test also referred to as glyoxylic acid reaction is one of the qualitative test methods to determine differences in types of proteins and amino acids. This test is used to identify the presence of the amino acid tryptophan in proteins; tryptophan is the only amino acid that has … Read more Hopkins Cole Test: Principle, Reaction, Reagents And Result Interpretation

What Is Sakaguchi Test? The Sakaguchi test is a chemical test that includes a colorimetric reaction for the identification and quantification of the amino acid arginine. Arginine is an amino acid that has a guanidine group in its side chain, which is the C atom that binds N2 with a single bond and binds N … Read more Sakaguchi Test: Objective, Principle, Procedure And Result Interpretation

What Is Millon’s Test? Millon’s test is an analytical test used for detection of presence of soluble proteins. Millon’s test is one of the qualitative methods to determine differences in types of proteins and amino acids, namely the type of phenolic amino or amino acids that have phenol groups such as tyrosine and it derivatives. … Read more Millon’s Test: Objective, Principle, Procedure And Result Interpretation

What Is Molisch’s Test? Molisch’s test is a sensitive chemical test, named after Austrian botanist Hans Molisch, used for the test of presence of carbohydrates, based on the dehydration of the carbohydrate by sulfuric acid or hydrochloric acid to produce an aldehyde, which condenses with two molecules of a phenol, resulting in violet ring. A … Read more Molisch’s Test: Objective, Principle, Procedure, Result And Application

What Is Barfoed’s Test? Barfoed’s test is a biochemical test used to detect monosaccharide (reducing) sugars in solution. The technique was devised by a Swedish physician C. T. Barfoed (1815–1899). Barfoed’s reagent, a mixture of ethanoic (acetic) acid and copper(II) acetate, is added to the test solution and boiled. If any reducing sugars are present … Read more Barfoed’s Test: Objective, Principle, Procedure, Results And Application