Having decided that it was presumptuous to invent a new term, I have chosen in this book the term first messenger to cover all types... Læs mere
It is 25 years since Dr Burgess wrote his invaluable book on hops and in the intervening period there have been very many advances in hop research and hop production techniques.
During the Inaugural Meeting of the European Association of Acarol ogists (EURAAC), held in Amsterdam in 1987, it was decided that the... Læs mere
Eutrophication is a problem which became widely recognised by the scientific community in the 1940s and 1950s. It remains however, one of the biggest and most widespread problems of fresh waters, particularly of lakes and an increasing problem for estuaries and coastal waters.
Lipids can usually be extracted easily from tissues by making use of their hydrophobic characteristics. Although research laboratories use generally sophisticated... Læs mere
The companies listed have been selected on the grounds of the size of their sales volume or balance sheet or... Læs mere
It is over sixty years since Alexander Fleming observed antibiosis between a Penicillium mould and bacterial cultures and gave the name penicillin to the active principle. It is... Læs mere
Minor bodies in the Solar System, though representing only a small fraction of the mass in the Solar System, may well play a fundamental role in terrestrial evolution.
To humans, cold has a distinctly positive quality. Probably the richness of descriptive English in this area stems from the early experiences of a group of essentially... Læs mere