from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A colorless volatile liquid, C5H8, used chiefly to make synthetic rubber.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An unsaturated hydrocarbon, C5H8, that is readily polymerized; natural rubber (caoutchouc) is cis-1,4-polyisoprene, and trans-1,4-polyisoprene is present in gutta-percha and balata; it is the structural basis for the terpenes.
from the GNU version of the Collaborative International Dictionary of English
- n. An oily, volatile unsaturated hydrocarbon (C5H8), obtained by the distillation of caoutchouc or gutta-percha, and used to make synthetic rubber by polymerization. In organic chemistry, it is viewed conceptually as the building block of the terpene series of hydrocarbons.
from The Century Dictionary and Cyclopedia
- n. A hydrocarbon (C5-H8), one of the hemiterpenes, produced in the destructive distillation of india-rubber or gutta-percha, and also obtainable from oil of turpentine.
A tanker hauling isoprene, which is a liquid used to make synthetic rubber, overturned on I-68 going westbound near the 21st mile marker.
The process can use sugars derived from sugar cane, corn, corn cobs, switchgrass or other biomass to produce the ingredient, a biochemical called isoprene, derived from renewable raw materials.
We also extended the mechanism to include aromatic hydrocarbons, and biogenics such as isoprene and terpenes; those wound up being closer to explicit/surrogate mechanisms.
Of 11 other compounds monitored, only isoprene, a natural component of exhaled breath, was significantly elevated on the third day after vaccination, possibly reflecting airway oxidative stress, researchers said.
PALCA: The X-ray pictures of the particular block copolymer Bates was studying - and in case you're interested, it was a mix of poly isoprene and poly lactide and poly styrene, poly isoprene and poly ethylene oxide anyway, those X-ray pictures suggested something unusual was going on.
About one billion car tires are made each year and roughly a quarter of each tire is made from isoprene, with each single tire using about seven gallons of crude oil.
When making synthetic rubber based on oil, isoprene is isolated as a derivative and used it to make synthetic rubber for car tires.
According to Mr. Knutzen, the process works like this: " Our scientists have genetically modified bacteria to eat sugar, feed it in the right environment and with the right nutrients, and convert it into something we call bio-isoprene, which can then be used to make synthetic rubber, " says Mr. Knutzen, " emphasizing that this is " biotechnology on the edge.
Claudia Vickers, a senior research fellow at the Australian Institute for Bioengineering and Nanotechnology, says that the Genencor and Goodyear bio-isoprene collaboration over the past couple of years is impressive.
The bio-isoprene project shows how biotechnology is really starting to deliver on the promises that researchers have made for the past decade, Dr. Vickers says.
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