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  • covalent
  • Carbides can be generally classified by chemical bonding type as follows: salt-like, covalent compounds, interstitial compounds, and "intermediate" transition metal carbides. (absoluteastronomy.com)
  • In one embodiment, after covalent attachment of a functionalized silicon compound to the surface of a solid silica substrate to form a functionalized coating on the substrate, an array of nucleic acids may be covalently attached to the substrate. (google.co.uk)
  • Molecules
  • In one embodiment, the silicon compounds are attached to the surface of a substrate comprising silica, such as a glass substrate, to provide a functionalized surface on the substrate, to which molecules, including polypeptides and nucleic acids, may be attached. (google.co.uk)
  • reaction
  • The inventors conducted extensive research to achieve the object described above, and found that alkoxy-(tetrazol-1-yl)benzaldehyde compounds can be safely and efficiently produced by subjecting 1-(alkoxyphenyl)-1H-tetrazole compounds to a reaction with hexamethylenetetramine in a sulfonic acid solvent and then to hydrolysis, and the inventors accomplished the present invention. (allindianpatents.com)
  • 4. An alkenyl compound of the formula II as claimed in claim 24, in which D is a divalent group of formula IIb, said alkenyl compound having been prepared by reaction of an alkenylphenol with a compound of formula VIII ##STR25## in which F is --SO 2 --, --SO--, --CMe 2 --, --O--, --C(CF 3 ) 2 --, --CH 2 -- or --CH-- and X is halo. (google.es)
  • The wire is then heated to the reaction temperature to form MgB 2 . (wikipedia.org)
  • Chemistry
  • Organic may refer to:* Of or relating to an organism, a living entity* Of or relating to an organ- Chemistry :* Organic matter, matter that has come from a once-living organism, is capable of decay or the product of decay, or is composed of organic compound* Organic chemistry, chemistry involving. (absoluteastronomy.com)
  • alkenyl
  • Cured resins of high fracture toughness are prepared from N,N'-bisimides of formula I ##STR1## and alkenyl compounds of formula II D(G).sub.m II in which D is an m-valent group and G represents a phenyl ring having at least one alkenyl (e.g. allyl or 1-propenyl) substituent. (google.es)
  • calculation
  • e) use of the terms relative molecular mass, M r , and relative formula mass and their calculation from relative atomic masses. (ocr.org.uk)
  • intermediate
  • For example, 2-methoxy-5-(5-methyltetrazol-l-yl)benzaldehyde is known to be of use as an important intermediate for a pharmaceutical that mainly serves as an analgesic or an anti-inflammatory agent (EP 0829480A2). (allindianpatents.com)
  • Ar is as defined above, where an aminoketone intermediate of the formula (II) is formed which, however, is cyclocondensed in situ to (I), in particular in an acidic medium, or c) hydrolysing imines of the formula (XXVII) in which Ar is as defined above with aqueous acids where an aminoketone intermediate of the formula (II) is formed which, however, is cyclocondensed in situ to (I). (allindianpatents.com)
  • Nitrogen
  • Schematic drawing, causes and effects of air pollution: (1) greenhouse effect, (2) particulate contamination , (3) increased UV radiation, (4) acid rain, (5) increased ground-level ozone concentration, (6) increased levels of nitrogen oxides. (wikipedia.org)
  • Nitrogen dioxide is a chemical compound with the formula NO 2 . (wikipedia.org)
  • alkoxy
  • An object of the present invention is to provide a process for safely and efficiently producing an alkoxy-(tetrazol-l-yl)benzaldehyde compound by formylating a 1-(alkoxyphenyl)-1H-tetrazole compound. (allindianpatents.com)
  • In particular, the present invention provides alkoxy-(tetrazol-l-yl)benzaldehyde compounds and processes for producing the same as described below. (allindianpatents.com)
  • Hitherto, only few substituted cyclic cc,a'-diphenylimines are known: three 2,5-diphenyl-1-pyrrolines which are alkoxy-substituted in the 2-phenyl ring [5-(2,5-dimethoxyphenyl)-2-phenyl-3,4-dihydro-2H-pyrrole and 5-(4-methoxyphenyl)-2-phenyl-3,4-dihydro-2H-pyrrole from Chem. (allindianpatents.com)
  • processes
  • Formylation reactions for aromatic compounds have been researched for a long period of time, and there are a variety of reported processes. (allindianpatents.com)
  • However, when 1-(alkoxyphenyl)-1H-tetrazole compounds are subjected to formylation reactions according to processes (1) to (4) above, the reactions hardly progress. (allindianpatents.com)
  • Therefore, formylation reactions for 1-(alkoxyphenyl)-1H-tetrazole compounds do not progress or are hazardous when prior-art processes are used. (allindianpatents.com)
  • isomers
  • In this context, a compound of the Formula 1 can be in the form of an arbitrary isomer or mixture of isomers, thus for example, for n=1 and R 1 , R 2 =further chemical bond, in the form of the cis or trans-isomer. (google.com)
  • hazardous
  • Thermal oxidisers are air pollution abatement options for hazardous air pollutants (HAPs), volatile organic compounds (VOCs), and odorous emissions. (wikipedia.org)
  • Properties
  • Theoretical understanding of the properties of MgB 2 has nearly been achieved by modelling two energy gaps. (wikipedia.org)
  • In the ex situ variant, the tube is filled with MgB 2 powder, reduced in diameter, and sintered at 800 to 1000 °C. In both cases, later hot isostatic pressing at approximately 950 °C further improves the properties. (wikipedia.org)