Schaeffer, W. I. (Rutgers, The State University, New Brunswick, N.J.), P. E. Holbert, and W. W. Umbreit. Attachment of Thiobacillus thiooxidans to sulfur crystals. J. Bacteriol. 85:137-140. 1963.-Electron micrographs of replicas of sulfur crystals before and after attack by Thiobacillus thiooxidans show that the microorganisms erode the crystal in the area immediately adjacent to the cell. When...

An infestation of termites is weakening mathematical writing. We all too often resort to wishy-washy conditionals such as ‘can be’ or ‘wish to’ hidden within the body of sentences. Just as termites weaken a building, these conditionals erode writing by turning what should be definite statements into weak conditionals. Get rid of them. If in your analysis or computational experiments you do some...

ocular surface because of the absence of scleral flaps and are more likely to erode through the conjunctiva. Even a microscopic break in the overlying conjunctiva could result in bacterial contamination. It would be worthwhile to compare the incidence of endophthalmitis and suture exposure over the long term with the authors’ technique and the scleral flap method. Ajay Singh, MD Jay M. Stewart,...

1 ECS University of Westminster, London, HA1 3TP, UK e-mail: [email protected] 2 Warrane College, University of New South Wales, Kensington, 1465, Australia e-mail: [email protected] 3 Department of Mathematics, Vellalar College for Women, Erode 638 009, Tamilnadu, India e-mail: [email protected] 4 Centre of Biomedical Engineering, Bulgarian Academy of Sciences P.O.Box 12, ...

Pharmaceuticals have provided the most compelling case for patents. The special status of drug patents is being eroded, however, by spiraling health care costs, which put downward pressures on patent premiums, and scientific developments, which stand to erode the value of patents by shrinking markets for individual drugs and limiting entry of generic producers. These changes call for a reexamin...

Neurofibroma of the scalp are mostly multiple as part of neurofibromatosis or other phakomatosis. De novo solitary types are less common and rarely erode the skull, unlike the intracranial counterpart. Skull erosion has been reported in adults with longstanding plexiform neurofibromas. We report a giant neurofibroma on the scalp of a five-year-old boy, managed in our center. Although this condi...

Substrate-handling robots for semiconductor and flat-panel-display manufacturing applications possess undesirable structural flexibilities and frictional effects which erode closed-loop stability and deteriorate tracking performance. In this study, advanced control and identification techniques are applied to cope with these control challenges. The techniques include sensorless modal stabilizat...

health, fail at their work or drop out of university. A university is a specialised community, with a particular pattern of selection, varying techniques for processing its material and with a 'wastage rate' that is of national concern. There are special stresses?social, academic and cultural?to which its population are subject. These can erode a vulnerable, developing personality, provoke a la...