Detail of "501-75-7"

Reference

Xanthan

Xanthan. Kirkovits, August Ernst; Waltenberger, Ingeborg (Jungbunzlauer A.-G.Several substances are used for example 11138-66-2 and 584-85-0 which are their cas registry numbers., Austria). Austrian AT 373916 B 12 Mar 1984, 5 pp. (German). (Austria). CODEN: AUXXAK. CLASS: IC: C12P019-06. APPLICATION: AT 82-2534 30 Jun 1982. DOCUMENT TYPE: Patent CA Section: 16 (Fermentation and Bioindustrial Chemistry) Xanthan [11138-66-2] is produced by fermn. with bacteria of the Xanthomonas campestris group, using growth regulators to control cell growth and product formation. Thus, a preculture of X. betlicola ATCC 19047 was inoculated into a medium contg. glucose 1, KH2PO4 0.05, (NH4)2SO4 0.02, MgSO4.7H2O 0.01% and trace elements and cultured at 28° with stirring and aeration until the optical d. at 540 nm reached 4. Then the medium was enriched to contain 5% glucose, 0.5% KH2PO4, and 6.2% (NH4)2SO4 and 0.2 g anserine [584-85-0]/L was added. In 3-4 h the optical d. reached 6, and 0.0005 g 1-methylhistamine [501-75-7] was added. Cell growth ceased and product formation began. After 60 h and with the stirring rate increased to 1000 rpm, xanthan concn. was 4.7%, a yield from glucose of 94%. .

Urinary excretion of histamine, methylhistamine (1-MeHi) and methylimidazoleacetic acid (MeImAA) in mastocytosis: comparison of new HPLC methods with other present methods

Urinary excretion of histamine, methylhistamine (1-MeHi) and methylimidazoleacetic acid (MeImAA) in mastocytosis: comparison of new HPLC methods with other present methods. Granerus, Goeran; Wass, Urban (Dep. Clin. Physiol. 2625-49-2 and 501-75-7 are also occured in this study., Univ. Goeteborg, Goeteborg, Swed.). Agents Actions, 14(3-4), 341-5 (English) 1984. CODEN: AGACBH. ISSN: 0065-4299. DOCUMENT TYPE: Journal CA Section: 9 (Biochemical Methods) Section cross-reference(s): 2, 14 New HPLC methods for the detn. of histamine, 1-MeHi, and MeImAA in human urine were compared with methods presently in use, the enzymic double-isotope assay for histamine, the DNFB-method for 1-MeHi and the semiquant. estn. of MeImAA by TLC. A fairly good agreement between the methods was obtained for the measurement of histamine and 1-MeHi, although there was a rather large random error probably due to poor precision of the present methods. The TLC method for MeImAA used so far overestimated by ~20% the HPLC-values, probably due to inaccurate correction for recovery by the internal std. technique. There was a strong correlation between the urinary excretion of 1-MeHi and MeImAA in mastocytosis patients and the molar ratio MeImAA/1-MeHi appeared significantly higher compared to normal controls and patients with chronic granulocytic leukemia indicating in general a more efficient histamine catabolism is mastocytosis. .