One of the more commonly cited reasons for rejecting a manuscript at AMR is that reviewers feel the submission lacks “construct clarity.” Yet reviewers (and editors) often find it difficult to articulate precisely what construct clarity is. Indeed, in contrast to other social sciences, such as sociology and psychology, where the nature and role of constructs are subjects of considerable debate,...

A series of articles1–4 published recently in The Lancet and Lancet Neurology raise an interesting issue that has implications for both the clinical management of hypertension and future research in hypertension, particularly in the development and use of different classes of blood pressure (BP)–lowering drugs. These studies, which were led by Peter Rothwell at the John Radcliffe Hospital in Ox...

polyvinyl butyral (pvb) was synthesized by condensation reaction of polyvinyl alcohol (pva) with butanal in aqueous medium containing an effective emulsifier and an inorganic acid as catalyst. the product was characterized by, ir, tg and dtg techniques. percentage of vinyl alcohol groups in the pvb was determined by a chemical method according to a standard method. some clear and soft film samp...