Transport mechanism chemical release

Sedimentary rocks have formed as a result of accumulation and compaction of mineral particles derived from pre-existing rocks, transported from their original places of occurrence and deposited in new environments. The essential ingredients for the formation of sedimentary rocks are (i) source materials, (ii) mechanical and chemical disintegration of these source materials, (iii) transportation of the released materials either in a clastic form... 

However, this does not preclude the possibility that in a portion of the oxide at least (the outer layer), the OH transport mechanism is operative, with the release of protons at the interface between the two oxide layers. Hence, in such a case, some field-assisted proton transfer is likely to take place through the outer layer while chemical dissolution should be operative at the outer O/S interface. 

Discovery. The majority of both old and new antidepressants act by virtue of their ability to inhibit monoamine transporter mechanisms in the brain. The concept that neurotransmitters are inactivated by uptake of the released chemical into the nerve terminal from which it had been released or into adjacent cells is less than 40 years old. Before this it was generally assumed that the inactivation of norepinephrine and the other monoamine neurotransmitters after their release from nerves was likely to involve rapid enzymatic breakdown, akin to that seen with acetylcholinesterase. The degradation of monoamines by the enzyme monoamine oxidase vas known early on, and in the 1950s a second enzyme catechol-O-methyl transferase (COMT) vas discovered and was thought to play a key role in inactivating norepinephrine and other catecholamines. 

Explosives and fuze safety is the process used to prevent premature, unintentional, or unauthorized initiation of explosives and devices containing explosives and to minimize the effects of explosions, combustion, toxicity, and any other deleterious effects. Explosives safety includes all mechanical, chemical, biological, electrical, and environmental hazards associated with explosives or EM environmental effects. Equipment, systems, or procedures and processes whose malfunction would cause unacceptable mishap risk to manufacturing, handling, transportation, maintenance, storage, release, testing, delivery, firing, or disposal of explosives are also included. 

Natural mobilization includes chemical, mechanical, and biological weathering and volcanic activity. In chemical weathering, the elements are altered to forms that are more easily transported. For example, when basic rocks are neutralized by acidic fluids (such as rainwater acidified by absorption of CO2), the minerals contained in the rocks can dissolve, releasing metals to aqueous solution. Several examples are listed below of chemical reactions that involve atmospheric gases and that lead to the mobilization of metals ... 

---