Suitability of Butyl Rubber Stoppers for Closing Anaerobic Roll Culture Tubes

Suitability of butyl rubber stoppers for closing anaerobic roll culture tubes.

Stringently anaerobic bacteria have been successfully cultured in rubber-stoppered roll tubes. Stoppers of certain types of rubber are so permeable to oxygen that they are unsuitable (Hungate, J. Bacteriol. 86:848, 1963). Butyl rubber is less permeable to gases than are many other types. The permeabilities of butyl stoppers and a common laboratory type to gases concerned in anaerobic culture wo...

Butyl rubber stoppers increase the shelf life of prereduced, anaerobically sterilized media.

Butyl rubber stoppers as compared with neoprene or black rubber stoppers significantly increased the shelf life of prereduced, anaerobically sterilized media for growth of obligately anaerobic bacteria.

Roll-your-own endothelial tubes

ust one ingredient can make the difference between a delicious meal and an inedible mess even the dog won't touch. Likewise, 20 years ago the recipe for cultivating endo-thelial cells lacked a vital factor, and many a dish of cells ended up in the trash. The vascular biologists who nabbed the missing ingredient not only simplified the process of growing endothelial cells; their discovery was al...

Rubber tubes in the sea.

A long tube with elastic walls containing water is immersed in the sea aligned in the direction of wave travel. The waves generate bulges that propagate at a speed determined by the distensibility of the tube. If the bulge speed is close to the phase velocity of the waves, there is a resonant transfer of energy from the sea wave to the bulge. At the end of the tube, useful energy can be extract...

Analysis of husking action in the rubber-roll rice sheller