Collection of biological stains should be documented by photographs and drawings. Dry and cool storage will allow biological samples to be stored over years.

Extraction of DNA should be performed only if necessary for a current investigation; the original stains should never be extracted completely. Contamination in the laboratory does not occur if the sampling is performed by trained personnel. Because many surfaces and even stains like fingerprints (skin lines), corneocytes on ropes, telogenic hair, the surface of skin after showering, etc. may contain material that is suitable for DNA typing, intelligent criminalistic decisions have to be made before collecting the evidence.

Intense swabbing and the use of sexual assault kits are simple yet very important procedures that guarantee maximum yield of DNA and collection of biological material even if it is not visible at the moment of collection. Even difficult stains such as feces can be extracted and should be stored frozen whenever possible. Under extreme field conditions, 90% EtOH may be used as a collection and storage liquid.

Getting Started With Dumbbells

Getting Started With Dumbbells

The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.

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