Search results for "valikoivuus"
showing 2 items of 2 documents
Selectivity of clientele in Finnish private early childhood education and care
2021
In accordance with the Nordic welfare model, the Finnish early childhood education and care (ECEC) system has traditionally been based on public provision and the idea of universalism. However, over the last twenty years the ECEC system has undergone market-oriented reforms. As a result, the share of private for-profit ECEC provision has grown significantly. By applying impression management theory, this qualitative research examines how representatives of private ECEC providers describe the selection and selectivity of their clientele and how they aim at managing the impression they convey through their descriptions. The study shows how three different mechanisms of selectivity are produce…
Chiral hemicucurbit[8]uril as an anion receptor: selectivity to size, shape and charge distribution
2017
A novel eight-membered macrocycle of the hemicucurbit[n]uril family, chiral (all-R)-cyclohexanohemicucurbit[8]uril (cycHC[8]) binds anions in a purely protic solvent with remarkable selectivity. The cycHC[8] portals open and close to fully encapsulate anions in a 1 : 1 ratio, resembling a molecular Pac-Man™. Comprehensive gas, solution and solid phase studies prove that the binding is governed by the size, shape and charge distribution of the bound anion. Gas phase studies show an order of SbF6− ≈ PF6− > ReO4− > ClO4− > SCN− > BF4− > HSO4− > CF3SO3− for anion complexation strength. An extensive crystallographic study reveals the preferred orientations of the anions within the octahedral cav…