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PROPANE ON THE WEB
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The following is from Wikipedia, the online encyclopedia (http://en.wikipedia.org/wiki/Propane):
Propane is a three-carbon alkane, normally a gas, but compressible to a liquid that is transportable. It is derived from other petroleum products during oil or natural gas processing. It is commonly used as a fuel for engines, barbecues, and home heating systems.
When commonly sold as fuel, it is also known as liquified petroleum gas (LPG or LP-gas) and can be a mixture of propane with smaller amounts of propylene, butane, and butylene. The odorant ethanethiol is also added so that people can ...
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Lens stem cells may reside outside the lens capsule: an hypothesis.(Commentary)(Clinical report)
Magazine article from: Theoretical Biology and Medical Modelling
; ...corresponding author) [1]; Rita A Meyer [2] Background Lens background The vertebrate lens is a transparent cellular structure, specialized to focus and transmit light. The lens is composed of two cell types - epithelial cells...
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LENSES INTO FOCUS -- How lenses work and how to choose them.(Statistical Data Included)
Magazine article from: Digital Video Magazine
; ...the more wide angle the lens. All prime lenses have a fixed focal length...operators to consider prime lenses. With a zoom lens, users can increase and...the more expensive the lens. Adapters and extenders Lenses for all types of cameras...
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Contact Lenses-a New Way to See
Newspaper article from: The Washington Post
; ...forced under the lens. Even so, it...people who wear hard lenses to take them out...careful. For contact lens wearers, that means...and care for the lenses. Lenses must be...on them. Contact lens wearers can't take...taking care of their lenses. Wearing dirty lenses...
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Camera lenses.
Magazine article from: PSA Journal
; ...needed in a fine lens. f) In reality, most of today's lenses are capable of producing...above. Normal Lens Before taking up...and "accessory lenses," let's define...point behind the lens so clearance is achieved.) These normal lenses have a focal length...
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Telecentric lenses simplify noncontact metrology.
Magazine article from: Test & Measurement World
; ...you can't use these lenses in all applications. Lens manufacturers can make...conventional machine-vision lens. All imaging lenses have an aperture stop...the lens, or a group of lenses. In a conventional lens, the opening or closing...
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Lenses for Every Eye.
Magazine article from: U.S. News & World Report
; ...silicone hydrogel lenses, an improved version of the soft lens introduced in 1971...permeable rigid lenses. That's important...you're getting a lens that breathes better...Association's contact lens and cornea section...silicone hydrogel lenses increased 50 percent...
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LENS MAKER TAKES SHARPER FOCUS ON DIFFUSE PRODUCTION PROCESS
Newspaper article from: Roanoke Times & World News
; ...many manufacturers of eyeglass lenses. John Hogan, president of The Spectacle Lens Group, said this week that...professional affairs for The Spectacle Lens Group, said a set of Definity lenses made from a basic plastic lens blank probably retails from...
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Lens hoods.
Magazine article from: PSA Journal
; ...precision cameras and lenses advise the use of a lens hood. This is sufficient...sizes for different lenses. Also, besides...hood protects the lens from rain and fingerprints...no wider than the lens mount are essential...manufacturers of such lenses include a threaded...
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Lens solution makers need to account for 'human factors'.
Newspaper article from: Medical Device Daily
; ...state that makers of contact lens solutions should come up...proof way to ensure that lenses are sterile, the subtext...the efficacy of contact lens solutions on lenses is complicated by the wide range of lens types on the market...
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Lens looks to catch eye of Boomers
Newspaper article from: Charleston Gazette
; ...vision. While such lenses have been around...J claims its lens offers significantly...year. Progressive lenses - in which the top part of the lens is for distance...type of eyeglass lens in the United States...of progressive lenses were sold last...
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