We describe a novel solid phase sorbent that was synthesized by coupling graphene oxide (GO) to ethylenediamine (EDA). This nanomaterial (referred to as GO-EDA) is capable of adsorbing the ions of iron, cobalt, nickel, copper, zinc and lead. The ethylenediamine-modified graphene oxide was characterized by X-ray photoelectron spectroscopy, scanning electron microscopy and Fourier transform infra...

10.1586/EEM.10.39 Phenylketonuria Phenylketonuria (PKU; Online Mendelian Inheritance in Man No. 262600) is a genetic disorder characterized by a deficiency of the hepatic enzyme phenylalanine-4-hydroxylase (PAH; EC 1.14.16.1), causing elevated concentrations of phenylalanine (Phe) in the blood and brain. Hyperphenylalaninemia (HPA) can also be caused by a deficiency of tetrahydrobiopterin (BH4)...

Four new architectures containing [Co2Mo10H4O38]6- polyoxoanions, (C2N2H10)2[Sr(H2O)5][Co2Mo10H4O38]·2H2O 1, (C2N2H10)2[Ba(H2O)3][Co2Mo10H4O38]·3H2O 2, (C3N2H12)2[Sr(H2O)5][Co2Mo10H4O38]·3H2O 3 and (C3N2H12)[Ba(H2O)4][Ba(H2O)4][Co2Mo10H4O38]·2H2O 4 (C2N2H10 = ethylenediamine; C3N2H12 = 1,3-propanediamine) have been synthesized and characterized by elemental analysis, IR spectroscopy, solid diff...

A particle-bound enzyme from the fungus imperfectus Cryfitococcus taurentii var. flavescens (NRRL Y-1401) mediates transfer of mannosyl units from GDP-mannose to endogenous primer. The enzyme requires divalent cations for activity. The pH optimum is ‘7.5 and the apparent K, for GDP-mannose is 0.14 mbr. A polysaccharide fraction that is associated with the enzyme was found to be similar to a pol...

A particle-bound enzyme from the fungus imperfectus Cryfitococcus taurentii var. flavescens (NRRL Y-1401) mediates transfer of mannosyl units from GDP-mannose to endogenous primer. The enzyme requires divalent cations for activity. The pH optimum is ‘7.5 and the apparent K, for GDP-mannose is 0.14 mbr. A polysaccharide fraction that is associated with the enzyme was found to be similar to a pol...