Criminalistics part 5and6,4

23問 • 3年前

問題一覧

it is a hard, brittle substance, typically transparent or translucent, made by fusing sand with soda, lime, and sometimes other ingredients and cooling rapidly.

Glass

it is the study of the fracture surfaces of materials. Fractographic methods are routinely used to determine the cause of failure in engineering structures, especially in product failure and the practice of forensic engineering or failure analysis.

Fractography

It suggested the use of a monochromator and hot stage to allow for the variation of temperature and wavelength simultaneously.

Emmons Double Variation

it is a unit-less measure of the speed of light in a transparent medium and is defined by Snell- Descartes’ law as the ratio of the velocity of light in a vacuum to the velocity of the wave in the transparent medium.

Refractive index or “n”

it is a function of chemical composition and atomic arrangement, which are controlled by the composition of the batch and the cooling history of the glass, respectively.

density

are any substance that may cause an explosion by its sudden decomposition or combustion

Explosives

it is one that depends on a physical reaction, such as overloading a container with compressed air.

Mechanical Explosives

it is an explosive device that derives its energy from nuclear reactions. This is once considered for use in large-scale excavation.

Nuclear Explosives

usually have less potential energy than fuels, but their high rate of energy release produces a great blast pressure.

Chemical explosives

it is a violent change of potential energy to work, which is then transferred into its surroundings in a form of rapid pressure.

Explosion

It is important sources of peroxides themselves. However, alkenes or olefins, and alkynes are subject to polymerization reactions that can be very exothermic and thus occasionally be explosive.

Ether Extraction

This analysis must be performed on an octadecylsilane-based or C18 column using acetonitrile-water mixture (55:45) as mobile phase

Acetone Extraction

This is the most common qualitative test for adventitious peroxides. The two primary variations on this procedure with the resulting formation of a yellow to brown color.

Iodide Test

To detect organic peroxides, a solution of titanium sulfate in 50% sulfuric acid is used. When this reagent is added to a peroxidized solvent, a yellow-orange complex is formed.

Titanium Sulfate

A rapid test performed to establish potential or presumptive positive result. It refers to the immunoassay test to eliminate a “negative” specimen, that is, one without the presence of drugs, from further consideration and to identify the presumptively positive specimen that requires confirmatory test.

Screening Test

it is a technique in which a sample is placed onto a planar stationary phase then a liquid mobile phase resulting in capillary action

Thin-Layer Chromatography (TLC).

involves the binding of an anti-body that is selective for the drug or drug group of interest or antigen, and a label that will be part of the antibody-antigen complex that can be detected using some means, such as fluorescence.

Immunoassay (IA).

This method has recently come under attention as a relatively cheap, easy-to-use presumptive test for fentanyl.

Urine Dipstick Test (UDT).

from the medical point of view, is a substance that when introduce into the body and is absorbed through the blood stream and acting chemically is capable of producing noxious effect

Poison

The evidence of the poisoning will depend upon whether the poisoning is acute or chronic. In acute poisoning the symptoms appear suddenly while the individual is in good health.

Ante-Mortem Poisoning

The changes or disturbance produced on the part with which the poison come in contact, for example, corrosion, inflammation, or a direct effect upon sensory as by-products of poisoning.

Local

The changes or disturbance produced in distant parts away from the site of application, for example, dilation of the pupils when belladonna is taken orally.

Remote

The effect of the poison is not only localized at the site but also affects remote organs, for example, phenol causes corrosion of the gastro intestinal tract, and causes convulsion.

Combined

Lea set A

Christian Jay Santos · 53問 · 3年前

Lea set A