نتایج جستجو برای: phosphates

تعداد نتایج: 12963  

2004
D. J. CHERNIAK J. PYLE JOHN RAKOVAN

(REE,Y) phosphates were synthesized in a 1 atm furnace by ß ux-growth methods involving Pb-free ß uxes. Microcrystalline (REE,Y) phosphate was precipitated from a solution of (REE,Y) chlorides or nitrates plus ammonium dihydrogen phosphate, and mixed with a M2CO3 (M = Li or Na)-MoO3 ß ux (75:25:2 molar ratio M2CO3:MoO3:REEPO4). Crystal growth was achieved over the temperature range 1350–870 °C,...

Journal: :The Journal of the Society of Chemical Industry, Japan 1970

Journal: : 2022

The article presents the results of study kinetics ions adsorption from multi-component mixtures. isotherms sorption ammonium nitrogen in presence phosphates indicate a decrease exchange capacity zeolite due to its competition for active absorption centres. This was carried out with two inorganic nature. In third organic component solution (protein substance - albumin), decreases even more comp...

Journal: :Organic & biomolecular chemistry 2015
William J Kerr David M Lindsay Vipulkumar K Patel Muralikrishnan Rajamanickam

Efficient conversion of ketones into kinetic enol phosphates under mild and accessible conditions has been realised using the developed methods with di-tert-butylmagnesium and bismesitylmagnesium. Optimisation of the quench protocol resulted in high yields of enol phosphates from a range of cyclohexanones and aryl methyl ketones, with tolerance of a range of additional functional units.

Journal: :Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 2011
Marco Terpolilli Daniele Merli Stefano Protti Valentina Dichiarante Maurizio Fagnoni Angelo Albini

The irradiation of a series of phenyl sulfonates and phosphates leads to the quantitative release of acidity with a reasonable quantum yield (≈0.2). Products characterization, ion chromatography analysis and potentiometric titration are consistent with the intervening of two different paths in this reaction, viz. cationic with phosphates and (mainly) radical with sulfonates.

Journal: :Cell 2013
Hiten D. Madhani

The spliceosome, an assembly of snRNAs and proteins, catalyzes the removal of introns from premessenger RNAs. A new study identifies specific phosphates in the U2-U6 snRNA complex that position two catalytic metals. Remarkably, these correspond precisely to metal-binding phosphates in a homologous structure of Group II self-splicing introns, long proposed to be the ribozyme progenitor of splice...

Journal: :Journal of bacteriology 1999
H Uemura D G Fraenkel

A gcr2 null mutant of Saccharomyces cerevisiae grows well on glucose in spite of its lower level of glycolytic enzymes between triose phosphates and pyruvate. A quantitative analysis shows that these levels are adequate to the flux but glycerate phosphates are elevated.

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