By Bhowmick D., Davison A.C.
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This moment version of a winning and highly-accessed monograph has been prolonged by way of greater than a hundred pages. It contains an enlarged insurance of purposes for fabrics characterization and research. additionally a extra special description of recommendations for choosing loose energies of ion move among miscible beverages is equipped.
Additional info for A Laplace mixture model for identification of differential expression in microarray experiments (200
Oxidation-Reduction The experiment with sulphur dioxide demonstrated one of the numerous oxidation-reduction reactions. In such reactions atoms of some substances take up electrons and atoms of other substances donate electrons. The former substances are called oxidizing agents (for example, potassium permanganate); the latter are reducing agents (sulphur dioxide). We now conduct some more experiments on oxidation reduction. Apply a drop of dilute iodine tincture on a freshly cut potato. A blue spot will appear, because potato starch turns blue in the presence of free iodine.
We will also need indicators, and since it is not 32 2. The First Experiments always possible to buy them, we will try to make them ourselves. We will use plants as raw materials because many flowers, fruits, berries, leaves, and roots contain coloured substances that change their colour under the influence of certain substances. Thus, when indicators are exposed to an acidic (or basic) medium, they vividly signal us about this. It is not difficult to gather "raw plant material" in forests, fields, orchards or gardens.
Hydrogen peroxide is a powerful oxidizing agent, it oxidizes many colouring agents, thereby decolourizing them. Scorch stains on white cotton and linen fabrics can also be removed by a redox reaction. ), 1 : 50 by mass, can be used as an oxidizing agent. If the fabric is overheated, brown products of thermal oxidation are formed, which calcium hypochlorite destroys and makes colourless. But remember that this reaction produces hydrochloric acid, which by itself can destroy the fabric. Therefore, immediately after cleaning, 52 2.