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Topic: Amine


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In the News (Sun 21 Apr 19)

  
  Tyrosine codon corresponds to topa quinone at the active site of copper amine oxidases -- Mu et al. 267 (12): 7979 -- ...
eukaryotes, we have isolated yeast amine oxidase from H. polymorpha.
serum amine oxidase implicates tyrosine as the precursor to topa quinone in
Biosynthesis of Topa Quinone Cofactor in Bacterial Amine Oxidases
www.jbc.org /cgi/content/abstract/267/12/7979   (510 words)

  
  Amine Reactivity
Amines are derivatives of ammonia in which one or more of the hydrogens has been replaced by an alkyl or aryl group.
The basicity of amines (next section) allows them to be dissolved in dilute mineral acid solutions, and this property facilitates their separation from neutral compounds such as alcohols and hydrocarbons by partitioning between the phases of non-miscible solvents.
The relationship of amine basicity to the acidity of the corresponding conjugate acids may be summarized in a fashion analagous to that noted earlier for acids.
www.cem.msu.edu /~reusch/VirtualText/amine1.htm   (3885 words)

  
 Highbeam Encyclopedia - Search Results for Amine
Amines such as adrenalin (epinephrine), noradrenalin (norepinephrine), dopamine, histamine, serotonin, and tryptamine are of special importance in...
Amines are derivatives of the inorganic compound ammonia,...
The reactions of amines with melamine formaldehyde crosslinkers in thermoset coatings.
www.encyclopedia.com /SearchResults.aspx?Q=Amine   (885 words)

  
 Amine at AllExperts
Amines are organic compounds and a type of functional group that contain nitrogen as the key atom.
Secondary amines have two organic substituents bound to N together with one H. In tertiary amines all three hydrogen atoms are replaced by organic substituents.
The aromatic amines, such as aniline, have their lone pair electrons conjugated into the benzene ring, thus their tendency to engage in hydrogen bonding is diminished.
en.allexperts.com /e/a/am/amine.htm   (1634 words)

  
 Amine help – Wiki at Help.com   (Site not responding. Last check: )
Amines are organic compounds and a type of functional group that contain nitrogen as the key atom.
Structurally amines resemble ammonia, wherein one or more hydrogen atoms are replaced by organic substituents such as alkyl and aryl groups.
Amides and amines have different structures and properties, so the distinction is chemically important.
www.help.com /wiki/Amine   (183 words)

  
 Amine HH
Amine HH Amine HH is commonly used in the manufacture of asphalt additives, corrosion inhibitors, epoxy curing agents and petroleum production chemicals among other applications.
It is a mixed amines stream containing both cyclic and linear materials, and contains primarily aminoethylpiperazine and triethylenetetramine and is an excellent chemical intermediate.
The average molecular weight of Amine HH is 135.
www.dow.com /amines/prod/ethyl-hh.htm   (120 words)

  
 GABA Oral Care - Dental Profession - Active Substances - Amine Fluoride   (Site not responding. Last check: )
Amine fluorides were developed in the 1950s by GABA in collaboration with the Institute of Dentistry of the University of Zurich (Switzerland).
The unique position of the amine fluorides is based on their special molecular structure: the fluoride ion is bound to an organic fatty acid amine fragment.
Amine fluorides have a hydrophobic molecular moiety, the non-polar tail (yellow), with a hydrophilic component, the polar amine head (red).
www.gaba.com /dental_profession/amine_fluoride.html   (285 words)

  
 Amine Summary
The aromatic amines, such as aniline, have their lone pair electrons conjugated into the benzene ring, thus their tendency to engage in hydrogen bonding is diminished.
Nitriles are reduced to amines using hydrogen in the presence of a nickel catalyst, although acidic or alkaline conditions should be avoided to avoid hydrolysis of -CN group.
By reduction of quaternary ammonium cations to tertiary amines in the Emde degradation.
www.bookrags.com /Amine   (2083 words)

  
 BioCatalytics - Enzymes :: Amine Transaminases
Amine transaminases catalyze the transfer of an amino group from a primary amine to a ketone or aldehyde.
Amine transaminases are highly enantioselective and therefore can be used for the synthesis of chiral amines from inexpensive ketones or they can be used for the resolution (enrichment) of racemic amines (see figure below).
Amine transaminases are pyridoxal-5'-phosphate (PLP) dependent and require PLP concentrations of 0.1 to 1.0 mM for optimal activity.
www.biocatalytics.com /ata.html   (246 words)

  
 Argonne Transportation - Amine 2003 Scientific American 50
The development of this high-power lithium battery is one of the innovations that led to Khalil Amine's designation as a 2003 Scientific American 50 research leader in automotive technology.
Amine's team has developed a high-power lithium-manganese spinel-based cell chemistry that costs less than previous cell chemistries proposed for this use and is safer.
Amine is head of the Technology Development group in the Battery Technology Department within Argonne's Chemical Engineering Division.
www.transportation.anl.gov /features/2003_amine_sci_am.html   (561 words)

  
 AIUK : Actions : Algeria: Hassiba Boumerdesi and Amine Sidhoum
Hassiba Boumerdesi and Amine Sidhoum have documented and opposed torture and unfair trials of people accused of terrorism and have worked with organisations of families of the 'disappeared'.
Algerian human rights lawyers Hassiba Boumerdesi and Amine Sidhoum were acquitted by a court in Algiers of charges of violating laws governing the organization and security of prisons.
Amine Sidhoum confirms that he passed on his business cards to the detainee, but does not consider that he comitted an offence in doing so.
www.amnesty.org.uk /actions_details.asp?ActionID=199   (990 words)

  
 Tertiary amine treatment - Patent 5359139
Neither the pink color body that is formed under acidic conditions nor its acid-activated precursor has yet been identified, and it is not known if the presence of the color body precursor as an impurity in some tert-amines is attributable to the raw materials and/or the techniques used in their syntheses.
However, regardless of the primary reason for the discoloration, the pink coloration of the amines and their derivatives is undesirable because of its interference with dyes which are apt to be included in the formulations in which they are used.
As is known, the tert-amines which present the aforementioned discoloration problem are amines which contain at least one long-chain alkyl group, and any of these tert-amines can be treated in accordance with the present invention.
www.freepatentsonline.com /5359139.html   (1027 words)

  
 Amine Reactivity
As noted earlier, 1º and 2º-amines are much weaker acids than alcohols, so it is not surprising that it is difficult to force the nitrogen function to assume the role of a nucleophilic leaving group.
For example, heating an amine with HBr or HI does not normally convert it to the corresponding alkyl halide, as in the case of alcohols and ethers.
Amine oxides are prepared by oxidizing 3º-amines or pyridines with hydrogen peroxide or peracids (e.g.
www.cem.msu.edu /~reusch/VirtualText/amine2.htm   (2969 words)

  
 Predicting Contamination Levels Of Upset Conditions In Amine Sweetening Systems
In addition, the amine process is subject to upsets that tend to increase the contamination level of the amine.
Because amine is recirculated, the process is particularly vulnerable to an upset.
Filtering of recirculating amine provides the following benefits: reduction of hot spots in the regenerator reboiler, reduced heat exchanger fouling, longer carbon bed life and reduction of foaming tendency in the amine absorber.
www.pall.com /articles_chemical_5208.asp   (2924 words)

  
 The MSDS HyperGlossary: Amine
Primary amines are derivatives of ammonia in which one hydrogen has been replaced by a hydrocarbon unit.
To avoid confusion in naming amines, the substituents (groups) that are attached to the nitrogen atom are given the prefixes N and N'.
Many amines are somewhat soluble in water (and most ammonium salts are), so be sure that any aqueous wastes you dispose of down the drain meet the appropriate EPA guidelines.
www.ilpi.com /msds/ref/amine.html   (849 words)

  
 Amine Group | World of Chemistry
Amines are organic compounds formed from ammonia (NH by the replacement of one or more hydrogen atoms by hydrocarbon groups (unlike the amides where the hydrogen in ammonia is replaced by organic acid groups).
Secondary amines are manufactured by heating a primary amine with an alkyl halide, although care must be used to ensure that excess alkyl halide is not used.
Secondary amines react with nitrous acid to give nitroso compounds, pale yellow oils that are insoluble in water.
www.bookrags.com /research/amine-group-woc   (512 words)

  
 Amine Treating
A downstream amine settler containing a coalescer is often needed to capture entrained amine.
The amine solution is recycled on manual flow control by one of two centrifugal pumps.
Recycling the amine solution provides more intimate contact between the LPG and amine phases than could be achieved with a once-through system.
www.merichem.com /products_services/refining_technology/product_literature/amine_treating/index.php   (895 words)

  
 Free Online Web Cam Chat Room - amine Chat | Webchat Community Directory
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About: my site is all about come here if you wouldlike to be frieands i all so like amine and writting so there rpg you can allso lean about me and my heaktect life.
thanks for adlene and amine, elmer, hafidh and saliha, rafik and salima, jahefa and nadia, taha and so on...................................
www.userplane.com /chatlite/directory/browse.cfm?search=amine   (264 words)

  
 EPRI: Sodium Leakage From Condensate Polishers Under Alternate Amine Chemistry   (Site not responding. Last check: )
This study describes testing of several amines in a pilot-scale condensate polisher loop to determine sodium leakage from ion-exchange resins operating in the amine form.
Sodium leakage from condensate polishers is particularly important when considering alternate amine chemistry, since it can contribute to early failure of steam generator tubing and lead to costly outages for repair and replacement.
However, data were needed on sodium leakage to confirm that these amines are compatible with the operation of condensate polishers.
www.epri.com /OrderableitemDesc.asp?product_id=TR%2D104299&targetnid=273227&value=06T061146&marketnid=273141&oitype=1&searchdate=11/1/1994   (727 words)

  
 Amine Treating Unit
The Amine (MDEA) is regenerated in the Amine Regenerator, and recycled to the Amine Contactor.
The Amine Regenerator Reflux Pump, pumps the condensate in the Regenerator Accumulator, mainly water, to the top tray of the Amine Regenerator A portion of the pump discharge is sent to the sour water tank.
The amine contactor is 5 feet in diameter by 65 feet tangent to tangent with 22 trays.
simtronics.com /catalog/spm/spm3100.htm   (1199 words)

  
 [No title]
Although their activating ligands vary widely in structure and character, the amino acid sequences of the receptors are very similar and are believed to adopt a common structural framework comprising 7 transmembrane (TM) helices [2, 3, 4].
Although some "trace amines" have clearly defined roles as neurotransmitters in invertebrates, the extent to which they function as true neurotransmitters in vertebrates has remained speculative.
Trace amine receptor 1 (TA1) is potently activated by tyramine and beta-phenylethylamine, and displays low affinity for tryptamine, octopamine and dopamine.
www.ebi.ac.uk /interpro/IEntry?ac=IPR009133   (536 words)

  
 GABA Oral Care - Dental Profession - Active Substances - Amine/stannous Fluoride   (Site not responding. Last check: )
The amine fluoride/stannous fluoride combination was developed by GABA in the 1980s.
By combining amine fluorides with stannous fluoride it has proved possible to stabilise the latter in a form which allows its release in the oral cavity, where it can develop its antibacterial effects.
When the amine fluoride/stannous fluoride complex reaches the oral cavity, the surface activity of amine fluoride ensures that it is rapidly distributed and transported to the surface of the teeth.
www.gaba.com /dental_profession/amine_stannous.html   (211 words)

  
 Untitled Document
This is done in Amine thanks to the separation between conceptual elements (concept type, concept referent, relation type) and their identifiers in a specific language.
Among the goals (and constraints) that have influenced the design and implementation of Amine were the goal to achieve a higher level of modularity and independence between components.
Amine Platform 2.0 is a complete revision and refinement of the first version, both at the conceptual and implementation levels.
amine-platform.sourceforge.net /intro.htm   (3889 words)

  
 Triphenyl Amine
Triphenyl amine is a colorless crystalline solid in the form of monoclinic prisms.
Clothing contaminated with triphenyl amine should be removed immediately, and provisions should be made for the safe removal of the chemical from the clothing.
Containers of triphenyl amine should be protected from physical damage and should be stored separately from oxidizing materials, aldehydes, ketones, nitrates, and peroxides should be avoided.
www.osha.gov /SLTC/healthguidelines/triphenylamine/recognition.html   (2294 words)

  
 Dossier: Amine Gemayel (February-March 2003)
For the eventual departure of Syrian forces from Lebanon is likely to come about when an unassuming future president or prime minister asserts the constitutional authority of his office and transcends the sectarian and parochial divisions that continue to curse the land of the cedars.
Amine was born in 1942, the eldest of the two sons and four daughters raised by Pierre and his wife, Genevieve.
Amine was a polished businessman and gifted orator in classical Arabic, while Bashir dressed casually and gave speeches in colloquial language.
www.meib.org /articles/0302_ld.htm   (5749 words)

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