(subg. ) sect. has been studied using integrative taxonomy methods and utilizing sampling from almost all areas of distribution of the species previously referred to this section.
View Article and Find Full Text PDFChem Commun (Camb)
December 2023
We report on a two-dimensional hexagonal "honeycomb" network comprising barium-seamed metal-organic nanocapsules involving a hexameric assembly of pyrogallol[4]arene ligands. The incorporated barium ions act as spacers to generate a solvent-accessible void, hierarchical self-assembly having an individual void volume near 13 000 Å. This work illustrates the surprising chemistry that remains to be discovered by integrating large or classically non-reactive metal ions within supramolecular assemblies, networks, and organic nanocapsules.
View Article and Find Full Text PDFThe inception of an unprecedented class of voluminous Platonic solids displaying hierarchical geometry based on pyrogallol[4]arene moieties seamed by divalent calcium ion is described. Single-crystal X-ray structural determination has established the highly conserved geometry of two original Ca-seamed nanocapsules to be essentially cubic in shape with -ethylpyrogallol[4]arene units located along the twelve edges of the cube which are then bridged by metallic polyatomic cations ([CaCl] or [Ca(HCO)Na]) at the six cube faces. The accessible volume of the nanocapsules is 3500 Å and 2500 Å and is completely isolated from the exterior of the capsules.
View Article and Find Full Text PDFTraffic Inj Prev
June 2023
Objective: This paper estimates the latest trends regarding the effect of sex on driver-side or right-front passenger-side occupant fatalities in fatal crashes. The focus is on how recent model year (MY) light vehicles with advanced occupant protection technologies compare to older vehicles without these protections in terms of female fatality risk relative to males.
Methods: Data from the Fatality Analysis Reporting System (FARS) from 1975 to 2019 is used to calculate estimates of female fatality risk relative to males using logistic regression models and the double-pair comparison method.
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