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The Ames process is a process by which pure uranium metal is obtained. [ 1 ] It can be achieved by mixing any of the uranium halides (commonly uranium tetrafluoride ) with magnesium metal powder or aluminium metal powder.
The Ames process was used on August 3, 1942, by a group of chemists led by Frank Spedding and Har... | https://en.wikipedia.org/wiki/Ames_process |
The Ames test is a widely employed method that uses bacteria to test whether a given chemical can cause mutations in the DNA of the test organism. More formally, it is a biological assay to assess the mutagenic potential of chemical compounds. [ 1 ] A positive test indicates that the chemical is mutagenic and therefore... | https://en.wikipedia.org/wiki/Ames_test |
Amgen Inc. (formerly Applied Molecular Genetics Inc. ) is an American multinational biopharmaceutical company headquartered in Thousand Oaks, California . [ 3 ] [ 4 ] As one of the world's largest independent biotechnology companies, Amgen has approximately 24,000 staff in total as of 2022. [ 5 ]
The name "AMGen" is a... | https://en.wikipedia.org/wiki/Amgen |
In mathematics , an amicable triple is a set of three different numbers so related that the restricted sum of the divisors of each is equal to the sum of other two numbers. [ 1 ] [ 2 ]
In another equivalent characterization, an amicable triple is a set of three different numbers so related that the sum of the divisors... | https://en.wikipedia.org/wiki/Amicable_triple |
In organic chemistry , an amide , [ 1 ] [ 2 ] [ 3 ] also known as an organic amide or a carboxamide , is a compound with the general formula R−C(=O)−NR′R″ , where R, R', and R″ represent any group, typically organyl groups or hydrogen atoms. [ 4 ] [ 5 ] The amide group is called a peptide bond when it is part of the ma... | https://en.wikipedia.org/wiki/Amide |
Amidines are organic compounds with the functional group RC(NR)NR 2 , where the R groups can be the same or different. They are the imine derivatives of amides (RC(O)NR 2 ). The simplest amidine is formamidine, HC(=NH)NH 2 .
Examples of amidines include:
A common route to primary amidines is the Pinner reaction . Rea... | https://en.wikipedia.org/wiki/Amidine |
Amidrazones are a class of chemical compounds formally derived from carboxylic acids . Amidrazones can exists in two tautomeric forms: hydrazide imides (RC(=NH)NHNH 2 ) and amide hydrazones (RC(NH 2 )=NNH 2 ). [ 1 ]
Some amidrazones have been employed as insecticides . They were known in 1993 by an agent of Dow Chemi... | https://en.wikipedia.org/wiki/Amidrazone |
This article deals with music software created for the Amiga line of computers and covers the AmigaOS operating system and its derivates AROS and MorphOS and is a split of main article Amiga software .
See also related articles Amiga productivity software , Amiga programming languages , Amiga Internet and communication... | https://en.wikipedia.org/wiki/Amiga_music_software |
Amiga productivity software is productivity software created for the Amiga line of computers and the AmigaOS operating system and its derivatives AROS and MorphOS .
The Amiga originally supported software titles such as WordPerfect , Deluxe Paint , and Lattice C . Video Toaster , one of the first all-in-one graphics a... | https://en.wikipedia.org/wiki/Amiga_productivity_software |
This article deals with programming languages used in the Amiga line of computers, running the AmigaOS operating system and its derivatives AROS and MorphOS . It is a split of the main article Amiga software . See also related articles Amiga productivity software , Amiga music software , Amiga Internet and communicatio... | https://en.wikipedia.org/wiki/Amiga_programming_languages |
Amiga software is computer software engineered to run on the Amiga personal computer. Amiga software covers many applications, including productivity, digital art , games , commercial, freeware and hobbyist products. The market was active in the late 1980s and early 1990s but then dwindled. Most Amiga products were ori... | https://en.wikipedia.org/wiki/Amiga_software |
Amiga support and maintenance software performs service functions such as formatting media for a specific filesystem , diagnosing failures that occur on formatted media, data recovery after media failure, and installation of new software [ citation needed ] for the Amiga family of personal computers —as opposed to appl... | https://en.wikipedia.org/wiki/Amiga_support_and_maintenance_software |
Tornado Codes,
IEEE Eric E. Sumner Award (2007)
Communication Society and Information Theory Society Best Paper Award (2007)
IEEE Hamming Medal (2012)
ISSCC Jan van Vessem Award (2014)
Amin Shokrollahi (born 1964) is a German-Iranian mathematician who has worked on a variety of topics including coding theory and alge... | https://en.wikipedia.org/wiki/Amin_Shokrollahi |
In organic chemistry , an aminal or aminoacetal is a functional group or type of organic compound that has two amine groups attached to the same carbon atom: −C(NR 2 )(NR 2 )− . (As is customary in organic chemistry , R can represent hydrogen or an alkyl group). [ 1 ] A common aminal is bis(dimethylamino)methane , a co... | https://en.wikipedia.org/wiki/Aminal |
Amination is the process by which an amine group is introduced into an organic molecule . This type of reaction is important because organonitrogen compounds are pervasive.
Enzymes that catalyse this reaction are termed aminases . Amination can occur in a number of ways including reaction with ammonia or another amine... | https://en.wikipedia.org/wiki/Amination |
In chemistry , amines ( / ə ˈ m iː n , ˈ æ m iː n / , [ 1 ] [ 2 ] UK also / ˈ eɪ m iː n / [ 3 ] ) are compounds and functional groups that contain a basic nitrogen atom with a lone pair . Formally, amines are derivatives of ammonia ( NH 3 in which the bond angle between the nitrogen and hydrogen is 107°), wherein one o... | https://en.wikipedia.org/wiki/Amine |
Amine alkylation ( amino-dehalogenation ) is a type of organic reaction between an alkyl halide and ammonia or an amine . [ 1 ] The reaction is called nucleophilic aliphatic substitution (of the halide), and the reaction product is a higher substituted amine. The method is widely used in the laboratory, but less so in... | https://en.wikipedia.org/wiki/Amine_alkylation |
Amine gas treating , also known as amine scrubbing , gas sweetening and acid gas removal , refers to a group of processes that use aqueous solutions of various alkylamines (commonly referred to simply as amines ) to remove hydrogen sulfide (H 2 S) and carbon dioxide (CO 2 ) from gases. [ 1 ] [ 2 ] [ 3 ] It is a common ... | https://en.wikipedia.org/wiki/Amine_gas_treating |
In chemistry , an amine oxide , also known as an amine N -oxide or simply N -oxide , is a chemical compound that has the chemical formula R 3 N + −O − . It contains a nitrogen - oxygen coordinate covalent bond with three additional hydrogen and/or substituent -groups attached to nitrogen. Sometimes it is written as R 3... | https://en.wikipedia.org/wiki/Amine_oxide |
In organic chemistry , amine value is a measure of the nitrogen content of an organic molecule . [ 1 ] Specifically, it is usually used to measure the amine content of amine functional compounds. [ 2 ] It may be defined as the number of milligrams of potassium hydroxide (KOH) equivalent to one gram of epoxy hardener re... | https://en.wikipedia.org/wiki/Amine_value |
Amino acid N -carboxyanhydrides , also called Leuchs' anhydrides , are a family of heterocyclic organic compounds derived from amino acids . They are white, moisture-reactive solids. They have been evaluated for applications the field of biomaterials . [ 1 ] [ 2 ] [ 3 ]
NCAs are typically prepared by phosgenation of ... | https://en.wikipedia.org/wiki/Amino_acid_N-carboxyanhydride |
An amino acid neurotransmitter is an amino acid which is able to transmit a nerve message across a synapse . Neurotransmitters (chemicals) are packaged into vesicles that cluster beneath the axon terminal membrane on the presynaptic side of a synapse in a process called endocytosis . [ 1 ]
Amino acid neurotransmitter... | https://en.wikipedia.org/wiki/Amino_acid_neurotransmitter |
Amino acid replacement is a change from one amino acid to a different amino acid in a protein due to point mutation in the corresponding DNA sequence. It is caused by nonsynonymous missense mutation which changes the codon sequence to code other amino acid instead of the original.
Not all amino acid replacements have ... | https://en.wikipedia.org/wiki/Amino_acid_replacement |
Amino acid biosynthesis is the set of biochemical processes ( metabolic pathways ) by which the amino acids are produced. The substrates for these processes are various compounds in the organism 's diet or growth media. Not all organisms are able to synthesize all amino acids. For example, humans can synthesize 11 of t... | https://en.wikipedia.org/wiki/Amino_acid_synthesis |
In chemistry , the amino radical , ·NH 2 , also known as the aminyl or azanyl , is the neutral form of the amide ion ( NH − 2 ). Aminyl radicals are highly reactive and consequently short-lived, like most radicals; however, they form an important part of nitrogen chemistry. In sufficiently high concentration , amino ra... | https://en.wikipedia.org/wiki/Amino_radical |
Aminoacylation is the process of adding an aminoacyl group to a compound. [ 1 ]
This chemical reaction article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Aminoacylation |
Aminoallyl nucleotide is a nucleotide with a modified base containing an allylamine . They are used in post-labeling of nucleic acids by fluorescence detection in microarray . They are reactive with N-Hydroxysuccinimide ester group which helps attach a fluorescent dye to the primary amino group on the nucleotide. These... | https://en.wikipedia.org/wiki/Aminoallyl_nucleotide |
In organic chemistry , aminobenzal is a functional group which is composed of a cyclic ketal of a diol with 4-dimethylaminobenzylidene . [ 1 ] It is seen in triamcinolone aminobenzal benzamidoisobutyrate . [ 1 ] [ 2 ]
This organic chemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Aminobenzal |
In organic synthesis , aminochlorination is a reaction that installs both a chlorine atom and an amino (or amido ) group to give an 2-aminoalkyl chloride. The reaction typically is effected by combining alkene substrates with chloramines . An alternative implementation involves Pd(II) -induced nucleophilic attack of ... | https://en.wikipedia.org/wiki/Aminochlorination |
δ-Aminolevulinic acid (also dALA , δ-ALA , 5ALA or 5-aminolevulinic acid ), an endogenous non-proteinogenic amino acid , is the first compound in the porphyrin synthesis pathway, the pathway that leads to heme [ 3 ] in mammals, as well as chlorophyll [ 4 ] in plants.
5ALA is used in photodynamic detection and surgery ... | https://en.wikipedia.org/wiki/Aminolevulinic_acid |
In chemistry , aminolysis (/am·i·nol·y·sis/) is any chemical reaction in which a molecule is lysed (split into two parts) by reacting with ammonia ( NH 3 ) or an amine . [ 1 ] The case where the reaction involves ammonia may be more specifically referred to as ammonolysis .
An example of an aminolysis reaction is the ... | https://en.wikipedia.org/wiki/Aminolysis |
Aminomethanol or methanolamine is the amino alcohol with the chemical formula of H 2 NCH 2 OH. With an amino group and an alcohol group on the same carbon atom, the compound is also an hemiaminal . [ 1 ]
In aqueous solution, methanolamine exists in equilibrium with formaldehyde and ammonia . [ 2 ] It is an intermediat... | https://en.wikipedia.org/wiki/Aminomethanol |
In organic chemistry , an aminomethyl group is a monovalent functional group with formula −CH 2 −NH 2 . It can be described as a methyl group substituted by an amino group −NH 2 .
Usually aminomethyl groups feature tertiary amines. Often they are obtained by alkylation with Eschenmoser's salt , a source of [CH 2 =N(... | https://en.wikipedia.org/wiki/Aminomethyl_group |
In organophosphorus chemistry , aminophosphines are compounds with the formula R 3−n P(NR 2 ) n where R is a hydrogen or organic substituent, and n = 0, 1, or 2. At one extreme, the parents H 2 PNH 2 and P(NH 2 ) 3 are lightly studied and fragile. At the other extreme, tris(dimethylamino)phosphine (P(NMe 2 ) 3 ) is com... | https://en.wikipedia.org/wiki/Aminophosphine |
An aminopolycarboxylic acid (sometimes abbreviated APCA ) is a chemical compound containing one or more nitrogen atoms connected through carbon atoms to two or more carboxyl groups. Aminopolycarboxylates that have lost acidic protons form strong complexes with metal ions. This property makes aminopolycarboxylic acids u... | https://en.wikipedia.org/wiki/Aminopolycarboxylic_acid |
Aminoxyl denotes a radical functional group with general structure R 2 N–O • . It is commonly known as a nitroxyl radical or a nitroxide , however IUPAC discourages the use of these terms, as they erroneously suggest the presence of a nitro group . [ 1 ] Aminoxyls are structurally related to hydroxylamines and N -oxoam... | https://en.wikipedia.org/wiki/Aminoxyl_group |
Amir Hamudi Hasan al-Saadi ( Arabic : عامر حمودي حسن السعدي ) or Amer al-Sadi (born April 5, 1938), "the organizational genius behind the Iraqi superweapons program," [ 1 ] was Saddam Hussein 's liaison with the UN inspectors in the runup to the 2003 invasion of Iraq . Like the defector Hussein Kamel al-Majid , he insi... | https://en.wikipedia.org/wiki/Amir_Hamudi_Hasan_al-Sadi |
Amir Sagi ( Hebrew : אמיר שגיא, born May 22, 1956) is a professor of life sciences at Ben Gurion University of the Negev , whose field of expertise is crustacean biology , physiology , endocrinology , and functional genomics . He contributed to the study of sexual differentiation , cell growth and aquaculture .
Sagi c... | https://en.wikipedia.org/wiki/Amir_Sagi |
In algebra , the Amitsur–Levitzki theorem states that the algebra of n × n matrices over a commutative ring satisfies a certain identity of degree 2 n . It was proved by Amitsur and Levitsky ( 1950 ). In particular matrix rings are polynomial identity rings such that the smallest identity they satisfy has degree exactl... | https://en.wikipedia.org/wiki/Amitsur–Levitzki_theorem |
Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the formula N H 3 . A stable binary hydride and the simplest pnictogen hydride , ammonia is a colourless gas with a distinctive pungent smell. Biologically, it is a common nitrogenous waste , and it contributes significantly to the nutritional need... | https://en.wikipedia.org/wiki/Ammonia |
This page provides supplementary chemical data on ammonia .
Table data (above) obtained from CRC Handbook of Chemistry and Physics 44th ed. The (s) notation indicates equilibrium temperature of vapor over solid. Otherwise temperature is equilibrium of vapor over liquid.
Vapor-pressure formula for ammonia: [ 4 ]
wher... | https://en.wikipedia.org/wiki/Ammonia_(data_page) |
Ammonia borane (also systematically named ammoniotrihydroborate [ citation needed ] ), also called borazane , is the chemical compound with the formula H 3 NBH 3 . The colourless or white solid is the simplest molecular boron - nitrogen - hydride compound. It has attracted attention as a source for hydrogen fuel, but i... | https://en.wikipedia.org/wiki/Ammonia_borane |
The ammonia fountain is a type of chemical demonstration. The experiment consists of introducing water through an inlet to a container filled with ammonia gas. [ 1 ] Ammonia dissolves into the water and the pressure in the container drops. As a result, more water is forced into the container from another inlet creating... | https://en.wikipedia.org/wiki/Ammonia_fountain |
Ammonia fungi are characterized by the rapid development and high germination rates of fruiting bodies in the presence of ammonia or other nitrogen-containing materials with alkaline soil conditions. [ 1 ] These fungi naturally occur after decomposition events like animal excretion or death. [ 2 ] Reproduction can be c... | https://en.wikipedia.org/wiki/Ammonia_fungi |
Ammonia production takes place worldwide, mostly in large-scale manufacturing plants that produce 240 million metric tonnes of ammonia (2023) annually. [ 1 ] Based on the annual production in 2023 the major part (~70%) of the production facilities are based in China (29%), India (9.5%), USA (9.5%), Russia (9.5%), Indon... | https://en.wikipedia.org/wiki/Ammonia_production |
Urea (46-0-0) accounts for more than fifty percent of the world's nitrogenous fertilizers. [ 1 ] It is found in granular or prill form, which allows urea to be easily stored, transported and applied in agricultural settings. It is also the cheapest form of granular nitrogen fertilizer. Since urea is not an oxidizer at ... | https://en.wikipedia.org/wiki/Ammonia_volatilization_from_urea |
Ammonium azide is the chemical compound with the formula [ N H 4 ]N 3 , being the salt of ammonia and hydrazoic acid . Like other inorganic azides , this colourless crystalline salt is a powerful explosive, although it has a remarkably low sensitivity. [NH 4 ]N 3 is physiologically active and inhalation of small amount... | https://en.wikipedia.org/wiki/Ammonium_azide |
Ammonium bifluoride is an inorganic compound with the formula [NH 4 ][HF 2 ] or [NH 4 ]F·HF . It is produced from ammonia and hydrogen fluoride . This colourless salt is a glass- etchant and an intermediate in a once-contemplated route to hydrofluoric acid .
Ammonium bifluoride, as its name indicates, contains an ammo... | https://en.wikipedia.org/wiki/Ammonium_bifluoride |
Ammonium cerium(IV) sulfate is an inorganic compound with the formula (NH 4 ) 4 Ce(SO 4 ) 4 ·2H 2 O. It is an orange-colored solid. It is a strong oxidant, the potential for reduction is about +1.44V. Cerium(IV) sulfate is a related compound.
A crystallographic study shows that the compound contains the Ce 2 (SO 4 )... | https://en.wikipedia.org/wiki/Ammonium_cerium(IV)_sulfate |
Ammonium chlorate is an inorganic compound with the formula NH 4 ClO 3 .
It is obtained by neutralizing chloric acid with either ammonia or ammonium carbonate , or by precipitating barium , strontium or calcium chlorates with ammonium carbonate or ammonium sulfate, producing the respective carbonate or sulfate precipi... | https://en.wikipedia.org/wiki/Ammonium_chlorate |
Ammonium chloride is an inorganic chemical compound with the chemical formula N H 4 Cl , also written as [NH 4 ]Cl . It is an ammonium salt of hydrogen chloride . It consists of ammonium cations [NH 4 ] + and chloride anions Cl − . It is a white crystalline salt that is highly soluble in water. Solutions of ammonium ch... | https://en.wikipedia.org/wiki/Ammonium_chloride |
Ammonium dichromate is an inorganic compound with the formula (NH 4 ) 2 Cr 2 O 7 . In this compound, as in all chromates and dichromates, chromium is in a +6 oxidation state , commonly known as hexavalent chromium . It is a salt consisting of ammonium ions and dichromate ions.
Ammonium dichromate is used in demonstrat... | https://en.wikipedia.org/wiki/Ammonium_dichromate |
Ammonium dinitramide ( ADN ) is an inorganic compound with the chemical formula [ N H 4 ][N(N O 2 ) 2 ] . It is the ammonium salt of dinitraminic acid HN(NO 2 ) 2 . It consists of ammonium cations [NH 4 ] + and dinitramide anions − N(NO 2 ) 2 . ADN decomposes under heat to leave only nitrogen , oxygen , and water .
It... | https://en.wikipedia.org/wiki/Ammonium_dinitramide |
Ammonium hypoiodites are a class of reactive intermediates used in certain organic oxidation reactions. They consist of either ammonium itself or an alkylammonium with various substituents as cation , paired with a hypoiodite anion as the active oxidant . The hypoiodite is generated in situ from the analogous iodide re... | https://en.wikipedia.org/wiki/Ammonium_hypoiodite |
Ammonium metavanadate is the inorganic compound with the formula NH 4 VO 3 . It is a white salt, although samples are often yellow owing to impurities of V 2 O 5 . It is an important intermediate in the purification of vanadium. [ 2 ]
The compound is prepared by the addition of ammonium salts to solutions of vanadat... | https://en.wikipedia.org/wiki/Ammonium_metavanadate |
Ammonium nitrate is a chemical compound with the formula NH 4 NO 3 . It is a white crystalline salt consisting of ions of ammonium and nitrate . It is highly soluble in water and hygroscopic as a solid, but does not form hydrates . It is predominantly used in agriculture as a high-nitrogen fertilizer . [ 5 ]
Its other... | https://en.wikipedia.org/wiki/Ammonium_nitrate |
Ammonium nitrite is a chemical compound with the chemical formula [NH 4 ]NO 2 . It is the ammonium salt of nitrous acid . It is composed of ammonium cations [NH 4 ] + and nitrite anions NO − 2 . It is not used in pure isolated form since it is highly unstable and decomposes into water and nitrogen , even at room temper... | https://en.wikipedia.org/wiki/Ammonium_nitrite |
Ammonium perchlorate ("AP") is an inorganic compound with the formula NH 4 ClO 4 . It is a colorless or white solid that is soluble in water. It is a powerful oxidizer . Combined with a fuel, it can be used as a rocket propellant called ammonium perchlorate composite propellant . Its instability has involved it in acc... | https://en.wikipedia.org/wiki/Ammonium_perchlorate |
Ammonium periodate is a chemical compound with the chemical formula NH 4 IO 4 . [ 1 ] [ 2 ]
Ammonium periodate is formed by the reaction of periodic acid and ammonia solution :
The compound forms colorless crystals [ 3 ] of tetragonal system , spatial group I41/a , cell parameters a = 0.5938 nm, c = 1.2790 nm, Z = 4.... | https://en.wikipedia.org/wiki/Ammonium_periodate |
Ammonium permanganate is the chemical compound NH 4 MnO 4 , or NH 3 · HMnO 4 . It is a water soluble, violet-brown or dark purple salt.
Ammonium permanganate was first prepared by Eilhard Mitscherlich in 1824 by reaction of silver permanganate with equal molar amount of ammonium chloride , filtering the silver chlorid... | https://en.wikipedia.org/wiki/Ammonium_permanganate |
Ammonium perrhenate (APR) is the ammonium salt of perrhenic acid , NH 4 ReO 4 . It is the most common form in which rhenium is traded. It is a white salt; soluble in ethanol and water, and mildly soluble in NH 4 Cl. [ 2 ] It was first described soon after the discovery of rhenium. [ 3 ]
The crystal structure of APR re... | https://en.wikipedia.org/wiki/Ammonium_perrhenate |
Ammonium persulfate (APS) is the inorganic compound with the formula (NH 4 ) 2 S 2 O 8 . It is a colourless (white) salt that is highly soluble in water, much more so than the related potassium salt . It is a strong oxidizing agent that is used as a catalyst in polymer chemistry , as an etchant , and as a cleaning and ... | https://en.wikipedia.org/wiki/Ammonium_persulfate |
Ammonium polyphosphate is an inorganic salt of polyphosphoric acid and ammonia containing both chains and possibly branching. Its chemical formula is H(NH 4 PO 3 ) n OH showing that each monomer consists of an orthophosphate radical of a phosphorus atom with three oxygens and one negative charge neutralized by an ammo... | https://en.wikipedia.org/wiki/Ammonium_polyphosphate |
Ammonium sulfate precipitation is one of the most commonly used methods for large and laboratory scale protein purification and fractionation that can be used to separate proteins by altering their solubility in the presence of a high salt concentration.
Ammonium sulfate is an inorganic salt with a high solubility tha... | https://en.wikipedia.org/wiki/Ammonium_sulfate_precipitation |
In chemistry , ammonolysis (/am·mo·nol·y·sis/) is the process of splitting ammonia into NH 2 − + H + {\displaystyle {\ce {NH2- + H+}}} . [ 1 ] Ammonolysis reactions can be conducted with organic compounds to produce amines (molecules containing a nitrogen atom with a lone pair , :N), [ 2 ] or with inorganic compounds t... | https://en.wikipedia.org/wiki/Ammonolysis |
In organic chemistry , ammoxidation is a process for the production of nitriles ( R−C≡N ) using ammonia ( NH 3 ) and oxygen ( O 2 ). It is sometimes called the SOHIO process , acknowledging that ammoxidation was developed at Standard Oil of Ohio . [ 1 ] [ 2 ] The usual substrates are alkenes . Several million tons of a... | https://en.wikipedia.org/wiki/Ammoxidation |
An amoeba ( / ə ˈ m iː b ə / ; less commonly spelled ameba or amœba ; pl. : amoebas (less commonly, amebas ) or amoebae ( amebae ) / ə ˈ m iː b i / ), [ 1 ] often called an amoeboid , is a type of cell or unicellular organism with the ability to alter its shape, primarily by extending and retracting pseudopods . [ 2 ] ... | https://en.wikipedia.org/wiki/Amoeba |
In mathematics, the amoeba order is the partial order of open subsets of 2 ω of measure less than 1/2, ordered by reverse inclusion. Amoeba forcing is forcing with the amoeba order; it adds a measure 1 set of random reals.
There are several variations, where 2 ω is replaced by the real numbers or a real vector space o... | https://en.wikipedia.org/wiki/Amoeba_order |
An amoeboflagellate ( pl. amoeboflagellates ) is any eukaryotic organism capable of behaving as an amoeba and as a flagellate at some point during their life cycle. Amoeboflagellates present both pseudopodia and at least one flagellum , often simultaneously. [ 1 ] [ 2 ]
The amoeboflagellate cell type has been acquired... | https://en.wikipedia.org/wiki/Amoeboflagellate |
An amorphism , in chemistry , crystallography and, by extension, to other areas of the natural sciences is a substance or feature that lacks an ordered form. In the specific case of crystallography, an amorphic material is one that lacks long range (significant) crystalline order at the molecular level. In the history ... | https://en.wikipedia.org/wiki/Amorphism |
An amorphous brazing foil (ABF) is a form of eutectic amorphous metal that serves as a filler metal in brazing operations. ABFs are composed of various transition metals (including nickel , iron , and copper ) blended with metalloids like silicon , boron , and phosphorus . By precisely managing the concentration of the... | https://en.wikipedia.org/wiki/Amorphous_brazing_foil |
Amorphous carbonia , also called a-carbonia or a-CO 2 , is an exotic amorphous solid form of carbon dioxide that is analogous to amorphous silica glass . It was first made in the laboratory in 2006 by subjecting dry ice to high pressures (40-48 gigapascal , or 400,000 to 480,000 atmospheres ), in a diamond anvil cell .... | https://en.wikipedia.org/wiki/Amorphous_carbonia |
In physics , amorphous magnet refers to a magnet made from amorphous solids . Below a certain temperature, these magnets present permanent magnetic phases produced by randomly located magnetic moments . [ 1 ] Three common types of amorphous magnetic phases are asperomagnetism , speromagnetism and sperimagnetism , which... | https://en.wikipedia.org/wiki/Amorphous_magnet |
An amorphous metal (also known as metallic glass , glassy metal , or shiny metal ) is a solid metallic material, usually an alloy , with disordered atomic-scale structure. Most metals are crystalline in their solid state, which means they have a highly ordered arrangement of atoms . Amorphous metals are non-crystalline... | https://en.wikipedia.org/wiki/Amorphous_metal |
Amorphous poly alpha olefin ( APAO ; also known as atactic poly alpha olefin ) is a commodity chemical used in multiple applications.
In the mid-to-late-1950s, atactic polypropylene (APP) was a by-product of the synthesis of isotactic polypropylene (iPP) using first and early second generation Ziegler–Natta catalysts ... | https://en.wikipedia.org/wiki/Amorphous_poly_alpha_olefin |
Amorphous silica-alumina is a synthetic substance that is used as a catalyst or catalyst support. [ 1 ] It can be prepared in a number of ways for example: [ 1 ]
Water-soluble contaminants, e.g. sodium salts, are removed by washing. [ 1 ] Some of the alumina is present in tetrahedral coordination as shown by NMR studi... | https://en.wikipedia.org/wiki/Amorphous_silica-alumina |
In condensed matter physics and materials science , an amorphous solid (or non-crystalline solid ) is a solid that lacks the long-range order that is a characteristic of a crystal . The terms " glass " and "glassy solid" are sometimes used synonymously with amorphous solid; however, these terms refer specifically to am... | https://en.wikipedia.org/wiki/Amorphous_solid |
Amos Alfred Fries (March 17, 1873 – December 30, 1963) was a general in the United States Army and 1898 graduate of the United States Military Academy . Fries was the second chief of the army's Chemical Warfare Service , established during World War I . Fries served under John J. Pershing in the Philippines and oversaw... | https://en.wikipedia.org/wiki/Amos_Fries |
The Amott test is one of the most widely used empirical wettability measurements for reservoir cores in petroleum engineering . The method combines two spontaneous imbibition measurements and two forced displacement measurements. This test defines two different indices: the Amott water index ( I w {\displaystyle I_{w}}... | https://en.wikipedia.org/wiki/Amott_test |
Amoxicillin is an antibiotic medication belonging to the aminopenicillin class of the penicillin family. The drug is used to treat bacterial infections [ 9 ] such as middle ear infection , strep throat , pneumonia , skin infections , odontogenic infections , and urinary tract infections . [ 9 ] It is taken orally (swal... | https://en.wikipedia.org/wiki/Amoxicillin |
The Ampelmann system is an offshore personnel transfer system which was founded in 2008 as a spin-off of the Delft University of Technology. The motion compensation platform allows access from a moving vessel to offshore structures, even in high wave conditions. transferring offshore crew from various types of vessels ... | https://en.wikipedia.org/wiki/Ampelmann_system |
Ampelography ( ἄμπελος , "vine" + γράφος, "writing") is the field of botany concerned with the identification and classification of grapevines, Vitis spp. Traditionally this has been done by comparing the shape and colour of the vine leaves and grape berries; more recently the study of vines has been revolutionised by ... | https://en.wikipedia.org/wiki/Ampelography |
The ampere balance (also current balance or Kelvin balance ) is an electromechanical apparatus used for the precise measurement of the SI unit of electric current , the ampere . It was invented by William Thomson, 1st Baron Kelvin .
The current to be measured is passed in series through two coils of wire, one of whic... | https://en.wikipedia.org/wiki/Ampere_balance |
Amperometric titration refers to a class of titrations in which the equivalence point is determined through measurement of the electric current produced by the titration reaction. It is a form of quantitative analysis .
A solution containing the analyte, A, in the presence of some conductive buffer. If an electrolyt... | https://en.wikipedia.org/wiki/Amperometric_titration |
The Antarctic land bridge was a land bridge connecting the continents of South America , Antarctica , and Australia that existed from the Late Cretaceous to the Late Eocene . The land bridge consisted of the entire continent of Antarctica (at the time unglaciated), as well as much narrower, now-submerged landforms that... | https://en.wikipedia.org/wiki/Amphi-Pacific_distribution |
There are several taxa named amphibia . These include:
Species with the specific epithet 'amphibia' | https://en.wikipedia.org/wiki/Amphibia_(taxon) |
The term amphibolism ( Ancient Greek : ἀμφίβολος , romanized : amphibolos , lit. 'ambiguous, struck on both sides') [ 1 ] is used to describe a biochemical pathway that involves both catabolism [ 2 ] and anabolism . [ 3 ] Catabolism is a degradative phase of metabolism in which large molecules are converted into smalle... | https://en.wikipedia.org/wiki/Amphibolic |
Amphidinium carterae is a species of dinoflagellates . It was first described by Edward M. Hulburt in 1957, and was named in honour of the British phycologist Nellie Carter-Montford . The type locality is Great Pond, Barnstable County, Massachusetts , USA. [ 3 ] Some strains of this species are considered as toxic (aga... | https://en.wikipedia.org/wiki/Amphidinium_carterae |
Amphipathic Lipid Packing Sensor (ALPS) motifs were first identified in 2005 in ARFGAP1 [ 1 ] [ 2 ] and have been reviewed. [ 3 ] [ 4 ]
The curving of a phospholipid bilayer , for example into a liposome , causes disturbances to the packing of the lipids on the side of the bilayer that has the larger surface area (the... | https://en.wikipedia.org/wiki/Amphipathic_lipid_packing_sensor_motifs |
In chemistry , an amphiphile (from Greek αμφις (amphis) ' both ' and φιλíα ( philia ) ' love, friendship ' ), or amphipath , is a chemical compound possessing both hydrophilic ( water-loving , polar ) and lipophilic ( fat-loving , nonpolar) properties. [ 1 ] Such a compound is called amphiphilic or amphipathic . Amphip... | https://en.wikipedia.org/wiki/Amphiphile |
In chemistry , an amphoteric compound (from Greek amphoteros ' both ' ) is a molecule or ion that can react both as an acid and as a base . [ 1 ] What exactly this can mean depends on which definitions of acids and bases are being used.
Amphoteric is derived from the Greek word amphoteroi ( ἀμφότεροι ) meaning "both".... | https://en.wikipedia.org/wiki/Amphoterism |
Amphotropism' or amphotropic indicates that a pathogen or parasite like a virus or a bacterium has a wide host range and can infect more than one species or cell culture line. The range is often of a mammalian spread. Amphotropism can be most effectively described in comparison to ecotropic and pantropic pathogens.
Am... | https://en.wikipedia.org/wiki/Amphotropism |
Ampicillin is an antibiotic belonging to the aminopenicillin class of the penicillin family. The drug is used to prevent and treat several bacterial infections , such as respiratory tract infections , urinary tract infections , meningitis , salmonellosis , and endocarditis . [ 6 ] It may also be used to prevent group B... | https://en.wikipedia.org/wiki/Ampicillin |
AmpliChip is a family of clinical tests from the Swiss healthcare company Hoffmann-La Roche which aims to find out the patients' genotype using micro-array technology from Affymetrix (Genechip). The tests include the CYP450 Test and the P53 Test . The CYP450 Test was approved by the U.S. Food and Drug Administration . ... | https://en.wikipedia.org/wiki/AmpliChip |
AmpliChip CYP450 Test is a clinical test from Roche and part of the AmpliChip series. The test aims to find the specific gene types ( genotypes ) of the patient that will determine how he or she metabolizes certain medicines, and therefore guides the doctors to prescribe the medicine suited for the best effectiveness a... | https://en.wikipedia.org/wiki/AmpliChip_CYP450_Test |
In molecular biology , an amplicon is a piece of DNA or RNA that is the source and/or product of amplification or replication events. It can be formed artificially, using various methods including polymerase chain reactions (PCR) or ligase chain reactions (LCR), or naturally through gene duplication . In this context, ... | https://en.wikipedia.org/wiki/Amplicon |
An amplicon sequence variant (ASV) is any one of the inferred single DNA sequences recovered from a high-throughput analysis of marker genes . Because these analyses, also called "amplicon reads," are created following the removal of erroneous sequences generated during PCR and sequencing, using ASVs makes it possible ... | https://en.wikipedia.org/wiki/Amplicon_sequence_variant |
The amplification factor , also called gain, is the extent to which an analog amplifier boosts the strength of a signal . Amplification factors are usually expressed in terms of power . The decibel (dB), a logarithmic unit, is the most common way of quantifying the gain of an amplifier.
In general an amplification fac... | https://en.wikipedia.org/wiki/Amplification_factor |
Amplified rDNA (Ribosomal DNA) Restriction Analysis is the extension of the technique of RFLP ( restriction fragment length polymorphism ) to the gene encoding the small (16s) ribosomal subunit of bacteria . The technique involves an enzymatic amplification using primers directed at the conserved regions at the ends of... | https://en.wikipedia.org/wiki/Amplified_Ribosomal_DNA_Restriction_Analysis |
Amplified fragment length polymorphism ( AFLP-PCR or AFLP ) is a PCR-based tool used in genetics research, DNA fingerprinting , and in the practice of genetic engineering . Developed in the early 1990s by Pieter Vos, [ 1 ] AFLP uses restriction enzymes to digest genomic DNA , followed by ligation of adaptors to the sti... | https://en.wikipedia.org/wiki/Amplified_fragment_length_polymorphism |
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