The existence of cellulose sodium xanthate has been known for over 60 years; the salt forms the basis of the important commercial process for making viscose rayon and cellophane. Yet, until very recently, no detailed knowledge of the chemical structure…

Our knowledge of free radicals and atoms has increased rapidly during the past decade through the use of new techniques. Atoms and free radicals have been detected spectroscopically in the gas phase by vacuum ultraviolet absorption (1,2), and by emission…

One of the best and oldest known tapeworm anthelmintics, a preparation from Dryopteris filix mas, commonly called the Male-fern, was known and used by the Greek physicians of ancient times (1). Their knowledge was lost in the Middle Ages except…