Reference

Stabilization of a mutant microorganism population

Stabilization of a mutant microorganism population. Maxwell, Peter C.Several substances are used for example 1119-72-8 and 108-88-3 which are their cas registry numbers.; Hsieh, Jih Han; Fieschko, John C. (Celanese Corp. , USA). Eur. Pat. Appl. EP 98750 A2 18 Jan 1984, 18 pp. DESIGNATED STATES: R: BE, DE, FR, GB, IT, NL. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C12P001-00; C12N015-00; C12P007-44. APPLICATION: EP 83-303840 1 Jul 1983. PRIORITY: US 82-394744 2 Jul 1982; US 83-483796 11 Apr 1983. DOCUMENT TYPE: Patent CA Section: 16 (Fermentation and Bioindustrial Chemistry) A mutant microorganism population is prevented from reverting by fermn. in a nutrient-limited medium. Thus, Pseudomonas putida ATCC 31,916, a mutant that does not grow on toluene [108-88-3] but metabolizes it to cis,cis-muconic acid [1119-72-8], was developed. P. putida ATCC 31,916 was cultured in a mineral salts medium contg. <2.24 g (NH4)2SO4/L for N-limited fermns., with glucose concns. ranging 5-10 g/L. Toluene-satd. air was bubbled through at 0.1 vol./min. at a broth temp. of 30° and pH of 6.2. The broth was dild. at a rate of 0.195 vol./h, and muconic acid prodn. continued for >25 residence times, compared to 2-3 residence times when N was not limited. .

Disproportionation of toluene over HZSM-5 zeolites

Disproportionation of toluene over HZSM-5 zeolites. Meshram, N. R.; Hegde, S. G.; Kulkarni, S. B.; Ratnasamy, P. (Natl. Chem. Lab., Poona City 411008, India). Appl. Catal., 8(3), 359-67 (English) 1983. CODEN: APCADI. ISSN: 0166-9834. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The acid strength distribution and catalytic behavior in the disproportionation of toluene of HZSM-5 zeolites with varying SiO2/Al2O3 ratios and calcined at different temps. have been studied. There are some commonly used reagents like 108-88-3 in this article. Results from the temp. programmed desorption of NH3 show weak, medium and strong acid sites. At high SiO2/Al2O3 values, the rates of both disproportionation and demethylation are decreased. Catalyst life is, however, prolonged considerably. The specific catalytic activity is proportional to the concn. of both strong and medium acid sites, implying that acid sites with a broad spectrum of acid strength are active centers for the disproportionation of toluene. .