Composite data for country groups in the WEO are either sums or weighted averages of data for individual countries. Arithmetically weighted averages are used for all data for the emerging market and ...

ACT said the lack of teachers, classrooms, and textbooks are to blame for the alarming figure of 18.9 million functionally ...

We report on the use of the hydrogen bond acceptor properties of some phosphorus-containing functional groups for the assembly of a series of [2]rotaxanes. Phosphinamides, and the homologous thio– and ...