Serine-based β-lactamases of Class A, C and D all rely on a key water molecule to hydrolyze and inactivate β-lactam antibiotics. This process involves two conserved catalytic steps. In the first acylation step, the β-lactam antibiotic forms an acyl-enzyme intermediate (ES*) with the catal...
Fig. 2: Temperature evolution of relaxational absorption band. aTemperature dependences of the real part of the dielectric permittivityε′ of a hydrous cordierite crystal forE||apolarization at different frequencies as indicated. In addition,ε′(T) data for a water-free cordierite crystal (WF, ...
1 c). Such a dynamic is a characteristic of individual emitters and is typically found in single molecule fluorescence 18., 19.. We also noticed that the brightness of each individual cluster and the number of clusters located in the field of view increased during the first 10 min of ...
In contrast, radioactively labelled water (tritiated water; THO) has a similar molecular structure as the water molecule (H2O) with the exception of one hydrogen (H) that is substituted with tritium (3H). Because of this structural similarity, AQPs exhibit comparable permeability characteristics ...
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The degradation of an organic molecule and heavy metal confiscation from wastewater is a chief topic of public attention because of its relevance to the environment and human health. Thus, the heavy metal contamination in wastewater is exceedingly creating a negative impact on the environment due to...
The H2O molecule is electrically neutral, but the positive and negative charges are not distributed uniformly. This is illustrated by the gradation in color in the schematic diagram here. The electronic (negative) charge is concentrated at the oxygen end of the molecule, owing partly to the non...
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The irreversibly adsorbed water in shale samples is presumably held tightly within the shale micropore space by the strong interaction between the adsorbed water molecule and the pore wall. The intrinsic mechanism for the observed hysteresis loops involves hydrogen bonding to some OFGs (Gregg and ...
In places where the same molecule presented different trimethylsilyl (tms) derivatives with similar patterns of change, only one representative of the group was shown. When there was no agreement in the behavior of the different tms derivatives, we presented both metabolites (e.g., Phe 1tms and...