Strychnine

Ning Shi Ning is a toxic alkaloid, C 21 H 22 N 2 O 2, obtained as a colorless or white diamond shaped crystal. They have a bitter taste and melt about 290 (C (4 p.1)). Alkaloids are all kinds of natural organic nitrogen bases, which usually contain one or more of these nitrogen atoms in the atomic ring called the ring system. Alkaloids are found primarily in plants and predominate in flowering plant species and the function of alkaloids in plants is believed to be only a waste of plant metabolic processes, but current research focuses on specific biological functions It suggests.

Bitterness is almost universally unpleasant for humans. This is because many nitrogen-containing organic molecules that exert pharmacological effects on humans are bitter. These include caffeine, nicotine and strychnine, which constitute stimulants in coffee, toxic substances in tobacco and active compounds in many pesticides. Since beverages including caffeine are widely consumed and enjoyed around the world, it seems that in psychological processes human beings will be able to overcome the natural aversion to bitterness. Many common drugs taste bitter and bitter; the gustatory system obviously interprets these compounds as poison. Thus, the unpleasant reaction to bitterness is the last warning system before ingesting the compound, which can cause damage.

Throughout history, various poisons such as arsenic, night shades, Tsuga, strychnine and arrow poison have been used for murder. Until the early nineteenth century, there was no way to accurately determine the presence of a particular chemical substance, and the poison was seldom punished for that crime. In 1836, British chemist James Marsh introduced one of the first major contributions to forensic medicine. He created a wetland test for arsenic testing and then used it successfully in a murder case. During this period forensic toxicology has come to be regarded as a unique field. Matthew Orfila, "Father of Toxicology", made great progress in the early 19th century. As a pioneer in the development of forensic microscopes Orfila has contributed to the development of this method of detecting blood and semen.

As a naturalist to kill and prepare animals, Kennecott may be exposed to pollutants, especially strychnine, arsenic and mercury in life. In the organization of Kenicot, all three substances and lead (which are used in various forms in the 19th century) were identified and quantified. However, the explanation is complicated, due to differences in accumulation levels of various organizations in life, soft tissue replacement of fat tissue after death, and penetration of groundwater into the coffin. Some chemicals may migrate during disintegration, and groundwater may have eluted water - soluble compounds or redistributed them. Since these factors are not fully understood, the detected value is considered to be the lowest concentration. Kenicot's brain adipocytes have evidence of strychnine. However, arsenic poisoning causes severe muscle contraction, and when it is found, the body explanation is completely incompatible with typical strychnine death.