The ligand-bound structure of LpxB was obtained by soaking crystals with 10 mM UDP-N-acytlglucosamine (UDP-GlcNAc), a mimic of one of the reactants, UDP-DAG (Fig. 3). Only the UDP portion of the molecule is resolved in the electron density map (Fig. 3b), suggesting that the Gl...
where δ15Nnitrate is the δ15N of the reactant nitrate source, f is the degree of seasonal nitrate consumption given by the concentration ratio between the remaining nitrate and the nitrate supply, and εassimilation is the isotope effect of nitrate assimilation, which is set to 5‰ given ava...
Density-functional-theory calculations suggest that the site-selectivity derives from the lower oxidation state of the iridium metal centre in the heterogeneous catalyst and its impact on the absorption energies of the reactants. These results showcase an example of a heterogeneous single-atom ...
However, the success of this reaction is in part hampered by an extremely marked regioselectivity on the double bond, which dictates that electron-poor alkenes react exclusively on the β-carbon. Here, we show that ligand-free, few-atom palladium clusters in solution catalyse the α-selective ...
Depending on the nature of the redox species, redox-flow systems can have a high degree of sustainability as they operate (1) in a water electrolyte, with low cost and abundant salts, and (2) in closed loops to ensure maximal use of the reactants....
Cathode reactants (O2, H2O2, TiO3) decrease [H] and completely inhibit hydrogen absorption under certain circumstances. Additions of pertitanate to an acetate-acetic buffer and to alkali cyanide solutions have shown that a blue-grey film is formed on the steel surface during cathodic polarization...
We investigate the A + B = 0 bimolecular chemical reaction taking place in low-dimensional spaces when the mobilities of the two reacting species are not equal. While the case of different reactant mobilities has been previously reported as not affecting the scaling of the reactant densities ...
Aliquots (20 μg) of the reactants were removed at different time points and analyzed through SEC on a Superdex Peptide 10/300 GL column eluted with 0.20 M NH4HCO3 at a flow rate of 0.4 ml/min and monitored at 232 nm using a UV detector. Online monitoring and data ...
activity between Pt/AC4 and Pt/AC5, exhibiting respectively the highest and lowest oxygen contents in the series, it appears that changes in porous properties, rather than oxygen functionalities, dominate the activity trend, possibly through altering the adsorption capacities of the reactants. To...
Theory:atestedexplanationofbasicnaturalphenomena;aunifyingprinciplethatexplainsabodyoffactsandthelawsbasedonthem 2.TheScientificMethod Observation/Problem Hypothesis(ExplainsObservation)Experiment(TestsHypothesis)ConsistentResults(SupportHypothesis)InconsistentResults(DisproveHypothesis)Law(Summarizes/PredictsResults)Theory(...