Erratum: Test tubes go microscopic

Tubes go apical

or microtubule asters, just as with life in general, sometimes you get stuck in a corner. And, say Cendrine Faivre-Moskalenko and Marileen Dogterom (FOM Institute for Atomic and Molecular Physics, Amsterdam, Netherlands), it can take a catastrophe to get things moving again. Dogterom has been trying to reproduce aster behavior in the minimal environment of a microfabricated chamber. Her beads, ...

Living cells as test tubes.

The combination of specific probes and advanced optical microscopy now allows quantitative probing of biochemical reactions in living cells. On selected systems, one can detect and track a particular protein with single-molecule sensitivity, nanometer spatial precision, and millisecond time resolution. Metabolites, usually difficult to detect, can be imaged and monitored in living cells with co...

Adult nasolacrimal duct bypass tubes: where do they go?

A 47-year-old man presented with a 1 year history of left epiphora. Six years previously it had been treated surgically in Turkey, although surgical details were not available and no external scars were evident. His vision was Snellen 6/6 right and 6/60 left, the decreased left acuity being a result of past stromal herpetic keratitis. All four puncta were patent and the right lacrimal drainage ...

Nine Test Tubes Generate any RE

In this paper we discuss how any recursively enumerable language can be generated using a distributed splicing system with a xed number of nine test tubes. This number has been recently reduced by other authors, and in this work we try to give an insightful algorithmic description of this kind of systems.

Erratum