J-Acid urea

J acid urea. See 5,5 -dihydroxy-7,7 -disulfon-ic-2,2 -disulfonic-2,2 -dinaphthylurea. 

J acid urea urea del acido J jacketed encamisado Jacobsen rearrangement transposicion de Jacobsen... 

The fastness to light of direct dyes often is improved by the formation of copper chelates. Direct Red 83 is the copper complex of the disazo dye prepared by coupling two moles of diazotized 2-aminophenol-4-sulfonic acid to one mole of J acid urea. 

Phosgenation. Reaction of phosgene with arylamines to form ureas, and with reactive aryl species to form substituted hen zophen ones, are special cases of acylation. They are dealt with separately siace a more specialized plant is required than for other acylations. Urea formation takes place readily with water-soluble arylamines by simply passiag phosgeae through a slightly alkaline solutioa. An important example is carbonyl-J-acid from J-acid. 

Wolfe, R.R., Wolfe, M.H., Nadel, E.R. Shaw, J.H.F. (1984) Isotopic determination of amino acid-urea interactions in exercise in humans. J. Appl. Physiol. 56, 221-229. 

Diazotised p-aminophenylarsinic acid is coupled with H acid in alkaline solution and the brownish-violet product cooled and stirred with diazotised diehlorobenzidine. The resultant dyestuff is a glistening dark brown powder, ginng a deep blue solution in water. In place of benzidine or diehlorobenzidine the following may be used tolidine, dianisi-dine, or diaminophenyl urea. Instead of H acid, S-amino-5-naphthol-7-sulphonic acid (J acid), 1 8-aminonaphthol-4-sulphonie acid (S acid or 1 8-dihydroxynaphthalene-8 6-di.sulphonie acid (chronio trope acid) may be employed. 

Stevens, J.F. and Newall, R.G. (1983). Application of reflectance spectroscopy to the estimation of uric acid, urea and glucose An evaluation of the Ames Seralyzer. J. Clin. Pathol. 36,9-13. 

Ough, C.S., Crowell, E.A., and Mooney, L.A. (1988). Formation of ethyl carbamate precursors during grape juice (Chardonnay) fermentation. I. Addition of amino acids, urea, and ammonia effects of fortification on intracellular and extracellular precursors, Am. J. Enol. Vitic., 39(3), 243-249. 

BIS (ACETATO)TRIHYDRO-XYTRILEAD ( 6 0 8 0 - 5 6-4) Pb(C2H30j)j 3H20 Contact with acids forms acetic acid. Incompatible with oxidizers, bases, acetic acid alkalis, alkylene oxides, ammonia, amines, bromates, carbonates, citrates, chlorides, chloral hydrate cresols, epichlorohydrin, hydrozoic acid, isocyanates, methyl isocyanoacetate, phenols, phosphates, salicylic acid sodium salicylate, sodium peroxyborate, potassium bromate resorcinol, salicylic acid, strong oxidizers, sulfates, sulfites, tannin, tartrates, tinctures trinitrobenzoic acid, urea nitrate. On small fires, use dry chemical, Halon , or COj extinguishers. 

Y eo. L. Harris. K.D.M. Guillaume. F. Temperature-dependent structural properties of the 1,10-decanedicar-boxylic acid/urea inclusion compound. J. Solid State Chem. 1997. 128. 273. 

Fig. 1A,B. Time course of nucleosomal histone HI ADP-ribosylation. Polynucleosomes were ADP-ribosylated with [32PJNAD as described in the text and histone HI was selectively extracted [12], run on acid/urea/Triton XlOO slab gels [15] and autoradiographed. A 200 nMNAD B 20 NAD. The incubation times were 30 s (a), 1 min (b, g)j 2 min 30 s (c, h), 5 min (d, /)> 10 min (e, /), and 15 min (f, k). S Stained gel. Arrow. histone HI complex position...

Subsequent chlorination of the amide takes place ia a two-phase reaction mixture (a dispersion of diamide ia hydrochloric acid) through which a chlorine stream is passed. The temperature of this step must be maintained below 10°C to retard the formation of the product resulting from the Hofmann degradation of amides. Reaction of the A/,A/-dichloroamide with diethylamine [109-89-7] ia the presence of base yields /n j -l,4-cyclohexane-bis-l,3-diethylurea (35), which is transformed to the urea hydrochloride and pyroly2ed to yield the diisocyanate (36). 

Methyl Nitrate,—Methyl nitrate was prepared from methyl alcohol, nitric acid, and urea nitrate by Mr. Willard McRary under the direction of Professor H. J. Lucas. The product was washed repeatedly with water and dried, and then was redistilled three times. 

Oda, Y. Naota, T. Komiya, N. J. Chem. Soc. Chem. Commun., 1993, 139 urea-H202 complex/maleic acid Q... 

Schaber, P.M., Colson, J., Higgins, S., et al. (1999) Study of the Urea Thermal Decomposition (Pyrolysis) Reaction and Importance to Cyanuric Acid Production, American Laboratory,... 

Rezanka, T. (1996). Two-dimensional separation of fatty acids by thin-layer chromatography on urea and silver nitrate silica gel plates. J. Chromatogr. A 727(1), 147-152. 

Brusilow, S., Tinker, J. and Batshaw, M. L. Amino acid acylation A mechanism of nitrogen excretion in inborn errors of urea synthesis. Science 207 659,1980. 

Working first with Polanyi, Weissenberg, and Brill, and later as the leader of the Textile Chemistry Section, Mark successively published papers on the crystal structures of hexamethylenetetramine, pentaerythritol, zinc salts, tin, urea, tin salts, triphenylmethane, bismuth, graphite, sulfur, oxalic acid, acetaldehyde, ammonia, ethane, diborane, carbon dioxide, and some aluminum silicates. Each paper showed his and the laboratory s increasing sophistication in the technique of X-ray diffraction. Their work over the period broadened to include contributions to the theories of atomic and molecular structure and X-ray scattering theory. A number of his papers were particularly notable including his work with Polanyi on the structure of white tin ( 3, 4 ), E. Wigner on the structure of rhombic sulfur (5), and E. Pohland on the low temperature crystal structure of ammonia and carbon dioxide (6, 7). The Mark-Szilard effect, a classical component of X-ray physics, was a result of his collaboration with Leo Szilard (8). And his work with E. A. Hauser (9, 10, 11) on rubber and J. R. 

Cheung, C.W., Cohen, N.G., Raijman, L. (1989). Channeling of urea cycle intermediates in situ in permeabilized hepatocytes. J. Biol. Chem. 264,4038-4044. Cohen, P.P. (1954). Nitrogen metabolism of amino acids. In Chemical Pathways in Metabolism (Greenberg, D.M., Ed.), Vol. 2, pp. 1-46. Academic Press, New York. Fisher, R.B. (1954). Protein Metabolism. Methuen, London. 

Borch-Jensen, C., Staby, A. and Mollerup, J. M. Ind. Eng. Chem. Res. 33 (1994) 1574-1579. Phase equilibria of urea-fractioned fish oil fatty acid ethyl esters and supercritical carbon dioxide. 

K. F. Gu and T. M. S. Chang, Conversion of ammonia or urea into essential amino acids, using artificial cells containing an immobilized multienzyme system and dextran-NAD+ IV. Malate dehydrogenase for coenzyme recycling, J. Mol. Catal, 62, 331-339 (1990). 

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