Studies on Resistance of Coloured Plastics to Weathering (I)

Adhesion and Scratch Resistance of Coatings on Plastics

Progress on these topics is occasionally updated in Coating Materials News (CMN) issues since polymer substrates are being used with greater frequency in displays, solar panels, laminated window glazing, reflectors for illumination, and other optical applications. Injection molded or form cast polymer parts are now mass-produced as economical and light-weight replacements for glass parts. The s...

Studies on digitalis. I. Direct effects on peripheral vascular resistance.

Studies on Resistance to Antibiotics

The discovery of gramicidin, penicillin, streptomycin, and the numerous other antibiotics known today has contributed materially to the list of therapeutic agents available against micro-organisms. However, the immediate enthusiasm which greeted their introduction has had to be checked by the realization that many of the important organisms affected readily develop resistance to the antibiotic ...

Studies on Tumor Resistance to 5-fluorouracil.

A line of Gardner lymphosarcoma resistant to 5-fluorouracil (FU)' was derived by treating the drug-sensitive line with FU for @1 selection passages. There was a signifi cant decrease in orotic acid decarboxylating enzyme activity in the resistant tumor line as compared with that in the drug-sensitive line. A partially purified preparation of OMP-pyrophosphorylase from drug-sensitive tumor cells...

Routes to greener plastics

How to hide a dimension from view Compacted dimensions are essential ingredients of advanced string theories; the extra dimensions used to describe the world are hidden from view, or compacted. Pendry et al. used concepts of transformation optics, in which metamaterials are designed to produce specific optical properties, to show theoretically that compacted dimensions could be possible in plas...