Ninety three cardiac catheterisations were carried out at St Thomas' Hospital on behalf of the Queen Elizabeth Military Hospital in 1991. Fifty-nine (63.4%) of procedures resulted in the patient's being recommended for further intervention. Sixteen (20%) of the 79 patients, thought to have ischaemic heart disease, had normal coronary arteries, but on further analysis of this group none could re...

Lactobacillus (Thermobacterium) acidophilus strain R-26 has been proposed as an assay organism for the determination of deoxyribonucleic acids (Hoff-J0rgensen, 1952). In attempting to use this organism for deoxyribonucleic acid determinations in our laboratory, it was noted that growth of the culture was very poor unless crude supplements, such as yeast extract or liver extracts, were added to ...

4). For the form of additive binary coding in which it is the branches that are coded, there must be a branch placed below the bottom-most character state, and that branch must contribute a derived code for all of the states in the tree (i.e., the minimum pathlength from each of the character states to the base of the tree passes through that branch). O'Grady and Deets (1987) remarked that alte...