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Determination of acid dissociation constants of anomers of amino sugars by 1H NMR spectroscopy
(Elsevier Science Publishers B. V., 1997)
Acid dissociation constants of α- and β-D-glucos-, mannos-, and galactos-ammonium ions have been determined from 1H NMR chemical shifts of the individual anomers in D2O. Values of pKa(D) for the α- and β-ammonium ions ...
Analysis of organic molecules, physicochemical parameters, and pollen as indicators for authenticity, botanical origin, type and quality of honey samples examined
(Taylor & Francis, 2020)
To contribute to Chilean honey's characterization, 12 honey samples were analyzed using comprehensive physicochemical and pollen analyses. Beekeepers donated samples from La Pintana, Linderos, Cajon del Maipo, and Chiloe. ...
Mixed complexes of cobalt(III) with D-glucosamine and phenanthroline
(Sociedad Chilena de Química, 1995)
Examination of 1H chemical shifts of a complex of D-glucosamine with bis-phenanthroline cobalt(III)shows that the dominant ∆-complex is formed from α-D-glucosamine. A molecular mechanics simulation of the structure of ...
Isolation and characterization of cobalt(III)tris-D-glucosamine
(SOCIEDAD CHILENA DE QUIMICA, 2004-06)
Mixed bis-phenanthroline Co(III) complexes with amino sugars disproportionate over a period of months, giving non-ionic tris(aminosugar)complexes. The complex with alpha-D-glucosamine has the Lambda-configuration with ...
Mapping the physiological response of oenococcus oeni to ethanol stress using an extended genome- scale metabolic model
(Frontiers Media, 2018)
The effect of ethanol on the metabolism of Oenococcus oeni, the bacterium responsible for the malolactic fermentation (MLF) of wine, is still scarcely understood. Here, we characterized the global metabolic response in O. ...
Evidence for a catalytic Mg2+ ion and effect of phosphate on the activity of Escherichia coli phosphofructokinase-2: Regulatory properties of a ribokinase family member
(AMER CHEMICAL SOC,, 2006-04-20)
Phosphofructokinase-2 (Pfk-2) from Escherichia coli belongs to the ribokinase family of sugar
kinases. One of the signatures observed in amino acid sequences from the ribokinase familiy members is
the NXXE motif, which ...
The ice composition in the disk around V883 Ori revealed by its stellar outburst
(Nature Publishing Group, 2019)
© 2019, The Author(s), under exclusive licence to Springer Nature Limited. Complex organic molecules (COMs), which are the seeds of prebiotic material and precursors of amino acids and sugars, form in the icy mantles of ...
Calcium Deposits in the Crayfish, Cherax quadricarinatus: Microstructure Versus Elemental Distribution
(Cambridge Univ. Press., 2016)
The crayfish Cherax quadricarinatus stores calcium ions, easily mobilizable after molting, for
calcifying parts of the new exoskeleton. They are chiefly stored as amorphous calcium carbonate (ACC) during
each premolt in ...
ent-Beyerane Diterpenes as a Key Platform for the Development of ArnT-Mediated Colistin Resistance Inhibitors
(American Chemical Society, 2020)
Colistin is a last-resort antibiotic for the treatment of multidrug resistant Gram-negative bacterial infections. Recently, a natural ent-beyerene diterpene was identified as a promising inhibitor of the enzyme responsible ...
ent-Beyerane Diterpenes as a Key Platform for the Development of ArnT-Mediated Colistin Resistance Inhibitors
(American Chemical Society, 2020)
Colistin is a last-resort antibiotic for the treatment of multidrug resistant Gram-negative bacterial infections. Recently, a natural ent-beyerene diterpene was identified as a promising inhibitor of the enzyme responsible ...