Highly Sterically-Crowded Subvalent Group 14 Compounds: Unexpected Structures and High Reactivity with Small Molecules

A series of new compounds, MAr2 (M = Ge, Sn, or Pb; Ar = terphenyl ligands) display structures and structural trends that are counter-intuitive with regard to steric effects. These trends are also reflected in their spectroscopic properties and in their reaction chemistry. It was found that the presence or absence of substituents at apparently-remote sites on the ligands can exert a large influence on the course of the reactions, as well as on the structural characteristics of the group 14 element environment.

How does the Plasma Membrane Participate in Receptor-Mediated Cell Signaling?

Cells are poised to respond to their physical environment and to chemical stimuli in terms of collective molecular interactions that are regulated in time and space by the plasma membrane and its connections with the cytoskeleton and intracellular structures. Small molecules may engage specific receptors to initiate a transmembrane signal, and the surrounding system efficiently rearranges to amplify this nanoscale interaction to microscale assemblies, yielding a cellular response that often reaches to longer length scales within the organism.

Graham Lecture: Increasing Access to Global Healthcare: The Medicines for All Institute

Abstract:   Access to global public healthcare is impacted by many technical, economic, and social factors. It is widely recognized that the resources required to deliver and improve global public health are currently constrained.  A powerful way to increase access is to lower the cost of products and services that have already proven to be effective.  Currently, the cost of producing a wide range of pharmaceutical products is higher than it needs to be.


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