Download Color atlas and manual of microscopy for criminalists, by Nicholas Petraco PDF

By Nicholas Petraco

Execs in lots of disciplines, from archeology to forensic technology and anthropology, has to be capable of establish natural and inorganic fibers and debris. in one resource, this e-book provides a variety of basic the way to aid readers speedy represent and determine a wide diversity of fabrics. protecting ingredients reminiscent of hair and fibers, minerals and soils, paints, medications, and mud, the publication offers the elemental ideas of microscopy and instructions for pattern training and exam. most significantly, it bargains greater than four hundred colour photomicrographs of the main mostly encountered fabrics for specimen comparability and quick id.

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Additional info for Color atlas and manual of microscopy for criminalists, chemists, and conservators

Example text

MICROMETRY Measurement of small linear distances, angles, and areas with a microscope is known as micrometry. Quantitative measurement with a microscope involves the use of various types of ocular scales, some of which are calibrated with a stage micrometer. The normal unit of measurement for length, width, and thickness is the micrometer (μm). One micrometer equals a millionth of a meter or 106 m. Two distinct types of micrometer devices are used with microscopes. The first is the ocular micrometer (OCM), usually an arbitrary scale produced on a round disc of glass placed at the primary focal plane of the ocular.

8 Preliminary examination data sheet. 9 Grooved Coplin jars filled with glass cleaner; examples of precleaned-from-package and cleaned microscope slides. 10 Temporary mount in Cargille oil: (1) place one or two drops of the oil on the slide (the glass rod has been modified for easier application of oil); (2) place specimen in oil; (3) place cover glass with oil on top of specimen; (4) use a pencil eraser to gently press the cover glass to remove air; and (5) drain off excess oil with a small piece of bibulous paper and label slide.

They are well established, easily obtainable, and accepted by the general scientific community. 2. The chemistry of most of the reactions is understood and well documented. 3. The tests are very sensitive and often highly specific. 4. The methods are easy to learn. 5. The tests require only very small quantities of test reagents. 6. Minute test sample sizes are needed for examination. 7. The tests can be used on pure elements, inorganic compounds, and organic molecules. 8. The cost of each test is minuscule.

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