DINA—

It has been recrystd from H2O (fine needles) and is freely soluble in boiling H2O. Crysts also from H2O by addition of acetone. Purified by chromatography on Dowex 1 (in formate form), eluting with 0.25M formic acid. It was then adsorbed onto charcoal (which had been boiled for 15min with M HCI, washed free of chloride and dried at 100°), and recovered by stirring three times with isoamyl alcohol/H20 (1 9 v/v). The aqueous layer from the combined extracts was evaporated to dryness under reduced pressure, and the product was crystallised twice from hot H2O. [Morrison and Doherty Biochem J19 433 7967]. It has A-max 259nm (e 15,400) in H2O at pH 7.0. [Alberty et al. J Biol Chem 193 425 7957 Martell and Schwarzenbach Heh Chim Acta 39 653 7956]. The acridinium salt has m 208° [Baddiley and Todd J Chem Soc 648 1947 Pettit Synthetic Nucleotides, van Nostrand-Reinhold, NY, Vol 1 252 1972 NMR Sarma et al. J Am Chem Soc 96 7337 1974 Norton et al. J Am Chem Soc 98 1007 1976 IR of diNa salt Miles Biochem Biophys Acta 27 324 1958],... 

Dinas-stein, m. Dinas brick, silica brick, -ton, m. Dinas clay. ziegeli m. DitMsiegel. Dinaton, m. Dinas clay. 

Other preparations and isolations. If damp methylenedi(nitroformamide) is allowed to stand for several days, the odor of formic acid is noticed, and MEDINA can be isolated from the residue (Ref 11, p 14). The details of scale-up to 150 lb batches, including exp details and flow sheets, and further scale-up with the aim of prodn of 1000 lbs are given. The report describes a fume-off and fire which occurred during the S3rd run. The cause was attributed to a stuck valve which allowed nitric acid to build up in the reactor (Ref 13, p 57). In Ref 16, p 73 there are cost analysis data for pilot plant and large scale prodn, flow sheet for a proposed coml plant, and material balances. The action of acet anhydr on N,Nf-bis(hydroxy-methyl)MEDlNA regenerates MEDINA (Ref 6) the diNa salt of N. N trinitrotrimethylene-diamine, on warming with me ale, ppts the Na salt of MEDINA... 

Die than olnitraminedinit rate (d) DINA NA + acet anhyd Vol 5, D1240-R... 

Macek (Ref 5) used Pentolite (and DINA) to study the transition from deflagration to detonation (DDT). He found that in Pentolite,... 

Dina (San Carlo) Eureceptor (Zambon) Gastromet (Bayropharm) Neo Gastransil (Schiapparelli Searle) Notul (Mendelejeff as hydrochloride)... 

All the eleetronie calculations were performed with the GAUSSIAN/90 [18] and GAUSSIAN/92 [19] eodes and the vibrational studies by the DiNa package [16]. Eleetronie wave funetions were generated by the Unrestrieted Hartree-Fock (UHF) formalism,... 

Pringsheim, E.G. Nova Acta Leopoldina. Abhandl. Dtsch. Akad. Naturforscher (Leopol-dina). 125, (18) 1 (1956)... 

Dina Fattakhova-RohUing, Ludwig-Maximilians-Universitat Miinchen, Department of Physical Chemistry and Biochemistry, Munich, Germany... 

Kristi S. Anseth, Dina C. Svaldi, Cato T. Laurencin2, and Robert Langer3... 

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