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DMA (human Protein)
DMA may refer to: Arts * ''DMA'' (magazine), a defunct dance music magazine * Dallas Museum of Art, an art museum in Texas, US * Danish Music Awards, an award show held in Denmark * BT Digital Music Awards, an annual event in the UK * Doctor of Musical Arts, a degree * Detroit Music Awards, an award show held in Michigan, US * DMA's, an Australian alternative rock band Organisations * DMA Design, now Rockstar North, a video game developer in Edinburgh, Scotland * Danish Medical Association * Derbyshire Miners' Association, England * Data & Marketing Association, formerly Direct Marketing Association * Durham Miners' Association, a trade union * Disney Movies Anywhere Education * DMA eV, (') an academic association for German and Moroccan graduates in Hanover, Germany * Delaware Military Academy, US * Digital Media Academy, US Government and military * Davis–Monthan Air Force Base (IATA airport code), near Tucson, Arizona, US * Defense Mapping Agency, a former agency of the U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DMA (magazine)
''DMA'' (''Dance Music Authority'') was a monthly American dance music publication that ran from 1993 to 2003. It originally ceased publishing due to a downturn in advertising revenue. Background ''Dance Music Authority Magazine'' (''DMA'') was based in Tinley Park, Illinois Illinois ( ) is a state in the Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolitan areas include, Peoria and Rockf ... and served as the voice of the dance music community, with articles, interviews and profiles of artistes, DJs and remixers, as well as in-depth record reviews, spotlights on clubs, dance music gear and equipment, and commentary on the genre in general. Like most independently owned publications, ''DMA'' thrived on the support of record labels and advertisers, most of them coming from the dance music industry and from die-hard fans of the genre. But, by 200 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defense Mapping Agency
The National Geospatial-Intelligence Agency (NGA) is a combat support agency within the United States Department of Defense whose primary mission is collecting, analyzing, and distributing geospatial intelligence (GEOINT) in support of national security. Initially known as the National Imagery and Mapping Agency (NIMA) from 1996 to 2003, it is a member of the United States Intelligence Community. NGA headquarters, also known as NGA Campus East or NCE, is located at Fort Belvoir North Area in Springfield, Virginia. The agency also operates major facilities in the Greater St. Louis, St. Louis, Missouri area (referred to as NGA Campus West or NCW), as well as support and liaison offices worldwide. The NGA headquarters, at , is the third-largest government building in the Washington metropolitan area after The Pentagon and the Ronald Reagan Building and International Trade Center, Ronald Reagan Building. In addition to using GEOINT for U.S. military and intelligence efforts, NGA pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimethylarsinic Acid
Cacodylic acid is an organoarsenic compound with the formula (CH3)2 AsO2H. With the formula R2As(O)OH, it is the simplest of the arsinic acids. It is a colorless solid that is soluble in water. Neutralization of cacodylic acid with base gives cacodylate salts, e.g. sodium cacodylate. They are potent herbicides. Cacodylic acid/sodium cacodylate is a buffering agent in the preparation and fixation of biological samples for electron microscopy. History In the 18th century it was found that combining and four equivalents of potassium acetate () gives a product called "Cadet's fuming liquid" which contains cacodyl oxide, and cacodyl, . Early research into "cacodyls" was reported by Robert Bunsen at the University of Marburg. Bunsen said of the compounds, "The smell of this body produces instantaneous tingling of the hands and feet, and even giddiness and insensibility... It is remarkable that when one is exposed to the smell of these compounds the tongue becomes covered with a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distributed Multipole Analysis
In computational chemistry, distributed multipole analysis (DMA) is a compact and accurate way of describing the spatial distribution of electric charge within a molecule. Multipole expansion The DMA method was devised by Prof. Anthony Stone of Cambridge University to describe the charge distribution of a molecule in terms of a multipole expansion around a number of centers. The idea of using a multi-center multipole expansion was earlier proposed by Robert Rein. Typically, the centers correspond to the atoms constituting the molecule, though this is not a requirement. A multipole series, consisting of a charge, dipole, quadrupole and higher terms is located at each center. Importantly, the radius of convergence of this multipole series is sufficiently small that the relevant series will be convergent when describing two molecules in van der Waals contact. The DMA series are derived from ab initio or density functional theory calculations using Gaussian basis sets. If the molecular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimethylaniline
''N'',''N''-Dimethylaniline (DMA) is an organic chemical compound, a substituted derivative of aniline. It consists of a tertiary amine, featuring dimethylamino group attached to a phenyl group. This oily liquid is colourless when pure, but commercial samples are often yellow. It is an important precursor to dyes such as crystal violet. Preparation and reactions DMA was first reported in 1850 by the German chemist A. W. Hofmann, who prepared it by heating aniline and iodomethane: :C6H5NH2 + 2 CH3I → C6H5N(CH3)2 + 2 HI DMA is produced industrially by alkylation of aniline with methanol in the presence of an acid catalyst:Kahl, Thomas ''et al.'' (2007) "Aniline" in ''Ullmann's Encyclopedia of Industrial Chemistry''. John Wiley & Sons: New York. :C6H5NH2 + 2 CH3OH → C6H5N(CH3)2 + 2 H2O Similarly, it is also prepared using dimethyl ether as the methylating agent. Dimethylaniline undergoes many of the reactions expected for an aniline, being weakly basic and rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimethylamine
Dimethylamine is an organic compound with the formula (CH3)2NH. This secondary amine is a colorless, flammable gas with an ammonia-like odor. Dimethylamine is commonly encountered commercially as a solution in water at concentrations up to around 40%. An estimated 270,000 tons were produced in 2005. Structure and synthesis The molecule consists of a nitrogen atom with two methyl substituents and one proton. Dimethylamine is a weak base and the pKa of the ammonium CH3--CH3 is 10.73, a value above methylamine (10.64) and trimethylamine (9.79). Dimethylamine reacts with acids to form salts, such as dimethylamine hydrochloride, an odorless white solid with a melting point of 171.5 °C. Dimethylamine is produced by catalytic reaction of methanol and ammonia at elevated temperatures and high pressure: :2 CH3OH + NH3 → (CH3)2NH + 2 H2O Natural occurrence Dimethylamine is found quite widely distributed in animals and plants, and is present in many foods at the level of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimethylacetamide
Dimethylacetamide (DMAc or DMA) is the organic compound with the formula CH3C(O)N(CH3)2. This colorless, water-miscible, high-boiling liquid is commonly used as a polar solvent in organic synthesis. DMA is miscible with most other solvents, although it is poorly soluble in aliphatic hydrocarbons. Synthesis and production DMA is prepared commercially by the reaction of dimethylamine with acetic anhydride or acetic acid. Dehydration of the salt of dimethylamine and acetic acid also furnishes this compound: : CH3CO2H·HN(CH3)2 → H2O + CH3CON(CH3)2 Dimethylacetamide can also be produced by the reaction of dimethylamine with methyl acetate. : The separation and purification of the product is carried out by multistage distillation in rectification columns. DMA is obtained with essentially quantitive (99%) yield referred to methyl acetate. Reactions and applications The chemical reactions of dimethylacetamide are typical of ''N'',''N''-disubstituted amides. Hydrolysis of the acyl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimethoxyamphetamine
Dimethoxyamphetamine (DMA) is a series of six lesser-known psychedelic drugs similar in structure to the three isomers of methoxyamphetamine and six isomers of trimethoxyamphetamine. The isomers are 2,3-DMA, 2,4-DMA, 2,5-DMA, 2,6-DMA, 3,4-DMA, and 3,5-DMA. Three of the isomers were characterized by Alexander Shulgin in his book '' PiHKAL''. Little is known about their dangers or toxicity. Positional isomers 2,4-DMA * ''Dosage'': 60 mg or greater * ''Duration'': "Probably short." * ''Effects'': stimulative, amphetamine-like effects 2,5-DMA 2,5-DMA is the alpha-methyl homologue of 2C-H and could be called "DOH" under the DO naming scheme. * ''Dosage'': 80–160 mg * ''Duration'': 6–8 hours * ''Effects'': Mydriasis, increase in heart rate * ''History'': 2,5-DMA was first synthesized in Tuckahoe, New York by Richard Baltzly and Johannes S. Buck in 1939. 3,4-DMA * ''Dosage'': 160 milligrams orally * ''Duration'': unknown * ''Effects'': Mescaline-like visuals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimethandrolone
Dimethandrolone (DMA), also known by its developmental code name CDB-1321, is an experimental androgen/anabolic steroid (AAS) and progestogen medication which is under investigation for potential clinical use. Dimethandrolone is an AAS, and hence is an agonist of the androgen receptor, the biological target of androgens like testosterone. It is also a progestin, or a synthetic progestogen, and hence is an agonist of the progesterone receptor, the biological target of progestogens like progesterone. Due to its androgenic and progestogenic activity, dimethandrolone has antigonadotropic effects. It has no estrogenic activity. Dimethandrolone was first described in 1997. It was developed by the Contraceptive Development Branch of the National Institute of Child Health and Human Development, an agency in the United States government. An ester and prodrug of dimethandrolone, dimethandrolone undecanoate (DMAU) (CDB-4521), is under development for potential use as a birth control pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delmadinone Acetate
Delmadinone acetate (DMA), sold under the brand name Tardak among others, is a progestin and antiandrogen which is used in veterinary medicine to treat androgen-dependent conditions such as benign prostatic hyperplasia. It must be used with care as it has the potential to cause adrenal insufficiency via inhibition of adrenocorticotropic hormone (ACTH) secretion from the pituitary gland. DMA is the C17α acetate ester of delmadinone, which, in contrast to DMA, was never marketed for medical use. Uses Veterinary DMA is used to treat androgen-dependent conditions in animals. It is most commonly used to treat benign prostatic hyperplasia. However, it can also be used to treat hypersexuality in male dogs and cats, perianal gland tumors in dogs, and hormone-driven aggression in dogs. Pharmacology Pharmacodynamics DMA is a progestogen with antigonadotropic and hence antiandrogenic and antiestrogenic effects. In addition, DMA binds to the androgen receptor, and likely acts as an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamic Mechanical Analysis
Dynamic mechanical analysis (abbreviated DMA) is a technique used to study and characterize materials. It is most useful for studying the viscoelastic behavior of polymers A polymer (; Greek '' poly-'', "many" + ''-mer'', "part") is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits. Due to their broad spectrum of properties, both synthetic an .... A sinusoidal stress is applied and the strain in the material is measured, allowing one to determine the complex modulus. The temperature of the sample or the frequency of the stress are often varied, leading to variations in the complex modulus; this approach can be used to locate the glass transition temperature of the material, as well as to identify transitions corresponding to other molecular motions. Theory Viscoelastic properties of materials Polymers composed of long molecular chains have unique viscoelastic properties, which combine the characteristics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dublin Metropolitan Area
The Greater Dublin Area (GDA; Irish language, Irish: ''Mórcheantar Bhaile Átha Cliath''), or simply Greater Dublin, is an informal term that is taken to include the city of Dublin and its hinterland, with varying definitions as to its extent. As of 2022, its estimated population is 2,073,459. The Dublin Transport Authority Act 2008 defines the Greater Dublin Area as including the counties of County Dublin, Dublin (Dublin, Dublin City, South Dublin, Dún Laoghaire–Rathdown and Fingal), County Meath, Meath, County Kildare, Kildare, and County Wicklow, Wicklow. The area is defined for transport and strategic planning and is not a formal political unit. The term can also apply more narrowly to the Dublin urban area and nearby suburban towns. Former boundaries The urban part of Dublin and surrounding areas has been defined by various statutory instruments, mainly those referring to the Garda Síochána and Courts of the Republic of Ireland. The city and five counties were grouped ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
