A porous item is a surface that contains openings that allow for the absorption of liquids to go through the material. One of the typical examples of porous materials is raw wood as it can absorb liquids or fingerprints oils especially if it is not varnished. Chemical development can be done through fingerprint processing of natural wood that is from a physical developer. Fingerprints can be developed through chemical processes of a silver based reagents that prints are produced, and they become gray colored (Trozzi 2001). In a crime scene, you can get wood outdoors, and this can also ...
Essays on Ninhydrin
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INTRODUCTION
Proteins play an essential role in living cells. The basic forming units of those proteins are the amino acids which are made up of similar composition i.e. amine group, carboxyl group and a variable R-group. The laboratory tests to identify these amino acids work on identifying the variable R-groups that distinguishes each amino acid. It is very important to note that all amino acids with alpha-amino group turn purple ranging from pink to deep violet. Proline is the notable exception (only amino acids that turns bright yellow). Proline is the only one with its unique color. Other amino acids has ...
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