生物学实验的各种颜色反应总结档（A variety of color reaction summary files for biological experiments）.docVIP

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2017-09-02 发布于河南
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生物学实验的各种颜色反应总结档（A variety of color reaction summary files for biological experiments）.doc

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生物学实验的各种颜色反应总结档（A variety of color reaction summary files for biological experiments）

生物学实验的各种颜色反应总结档（A variety of color reaction summary files for biological experiments） Biology experiments all kinds of color response summary file.Txt, two people quarrel, say sorry first, and not admit defeat, and not forgive. He only cares more about the relationship than the other. 1 Fehling reagent detection of soluble reducing sugar Principle: sugar + Fehling reagent, brick red precipitate reduction Note: the Fehling reagent and the second liquid to a liquid mixture evenly before use, and is now equipped with water bath heating conditions, need. Application: Test and determine whether a sugar is a reducing sugar; determine the amount of sugar in different biological tissues; diagnose the disease in medicine, such as diabetes mellitus and nephritis. 2 Sultan III and Sultan IV detected fat Principle: Sultan III + fat + orange; Sultan IV + fat red Note: identification of fat requires microscopic observation. Application: test whether nutrients in foods contain fat. Detection of protein 3 biuret reagent Principle: protein + biuret reagent, purple Note: when using the biuret reagent, before adding A solution and B solution, reaction conditions for room temperature (without heating). Application: identifying proteins in certain digestive juices; used in identification of inferior milk powder. 4 iodine solution test starch Principle: starch + iodine liquid, blue Note: the iodine here is elemental iodine, not ionic iodine. Application: test whether food contains starch or not Staining and identification of 5DNA Dyeing principle: DNA+ methyl green to green Application: the distribution of DNA in cells can be displayed. Identification principle: DNA+ two aniline blue Application: an identification reagent used in DNA crude extraction experiment. 6, the red color of the RNA is red Principle: RNA+, red to red Application: the distribution of RNA in cells can be displayed. Note: when observing the distribution of DNA and RNA in cells, use a mixture of methyl green and pirox