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Physical-technical research methods

As specified in the "Rules", the subject of forensic examinations conducted in physical and technical departments, are the establishment and evaluation of the facts, to identify which requires, in addition to specialist knowledge in the field of forensic medicine, the application of different laboratory techniques (physical, technical, chemical, mathematical, and others).
Objects forensic examinations, which are produced in physical and technical departments are the organs and tissues of the body, the victims (the accused, suspects), guns injury, clothing and footwear, and also materials of the investigation and court cases.
In physical and technical departments are the following types of examinations:
1) determination of the nature of the damage and the mechanism of their formation on the body and clothing under the action blunt and sharp objects, firearms, electricity and others;
2) establishing the damaging of the object (guns injury) in damages on the body and clothing;
3) establish the form and mechanism of formation of blood traces on clothes, guns injuries and other facilities;
4) the study of skeletal remains to establish the species, sex and age, growth, identification of a person, as well as old burial (death);
5) determination of the age of x-ray and anthropometric methods;
6) other types of expertise, for production of which requires special knowledge in the area of forensics and border disciplines (anthropology, criminology and other).
Most of the research in physical and technical departments, connected with causing mechanical damage.
To resolve issues arising from the conduct of examinations in physical and technical departments applies a complex of methods: visual, metric (macro - and microsporidia, anthropometry, osteometry, roentgenometry), microscopic (direct, polarization, fluorescent, stereo microscopy, and others), x-ray, photographic, color prints, chemical, spectrographic, comparatively microscopic and other
The choice of research methods is determined by the form, peculiarities of examination and diagnostic possibilities of the method as applied to the nature of the questions which are subject to expert resolution. For example, during the examinations, in which it is necessary to resolve the issues of identification tools injury, and the mechanism of their effect on traces on the skin, soft tissues, bones, cartilage and clothing apply: 1) visual and microscopic (direct microscopy) research to identify overlays on the gun injuries (identified overlay traces of blood cells of animal origin - pass for special studies in biological and Cytology Department); 2) different methods of photography (major, op, stereoscopic, tsvetodelenie and others) to identify and study traces of injuries; 3) macro - and microsporidia; 4) x-rays to identify specific features of the damage and the presence of foreign bodies; 5) obtaining experimental traces and subsequent comparative studies; 6) the method of color prints, the reaction of the Perls for detection of metals; 7) spectral method for the detection of metals; 8) production of casts of the wound channels; 9) fill contrast weight wound channel with subsequent x-rays.
Here is a description of the most commonly used methods and their diagnostic capabilities.