Search results
Results from the WOW.Com Content Network
TMA's positional isomer 2,4,5-trimethoxyamphetamine (2,4,5-TMA or TMA-2) is much more potent than TMA, with a dosage of 20 to 40 mg and a duration of 8 to 12 hours. [ 5 ] TMA is a low- potency serotonin 5-HT 2A receptor partial agonist , with an affinity (K i ) of >12,000 nM, an EC 50 Tooltip half-maximal effective concentration of 1,700 nM ...
TMA-2 may be: TMA-2 mine; Soyuz TMA-2, a Russian space exploration mission; 2,4,5-Trimethoxyamphetamine (TMA-2), a hallucinogenic drug;
Al 2 Me 6 + 3 H 2 O → Al 2 O 3 + 6 CH 4. Under controlled conditions, the reaction can be stopped to give methylaluminoxane: AlMe 3 + H 2 O → 1/n [AlMeO] n + 2 CH 4. Alcoholysis and aminolysis reactions proceed comparably. For example, dimethylamine gives the dialuminium diamide dimer: [7] 2 AlMe 3 + 2 HNMe 2 → [AlMe 2 NMe 2] 2 + 2 CH 4
The most important TMA compound from a pharmacological standpoint is TMA-2, as this isomer has been much more widely used as a recreational drug and sold on the grey market as a so-called research chemical; TMA (sometimes referred to as "mescalamphetamine" or TMA-1) and TMA-6 have also been used in this way to a lesser extent.
During atomic layer deposition, a film is grown on a substrate by exposing its surface to alternate gaseous species (typically referred to as precursors or reactants). In contrast to chemical vapor deposition, the precursors are never present simultaneously in the reactor, but they are inserted as a series of sequential, non-overlapping pulses.
TMA-2 is said to be active at doses of 20 to 40 mg and to have a duration of 8 to 12 hours. [1] It is much more potent than its positional isomer 3,4,5-trimethoxyamphetamine (3,4,5-TMA, TMA, or TMA-1), which is said to be active at doses of 100 to 250 mg and to have a duration of 6 to 8 hours. [ 3 ]
Tetramethylammonium (TMA) is the simplest quaternary ammonium cation. It has the chemical formula [Me 4 N] + and consists of four methyl groups (−CH 3, denoted Me) attached to a central nitrogen atom. The cation is isoelectronic with neopentane (Me 4 C). It is positively-charged and can only be isolated in association with a counter-ion.
A TMA-2. The TMA-2 is a rectangular plastic cased Yugoslavian minimum metal anti-tank blast mine.It is very similar in appearance and size to the PT-56, which it replaced.The mine consists of two sections, an upper ribbed pressure plate with two large circular fuze caps, and a lower base section containing the main charge and two primary fuze wells containing UANU-1 fuzes.