OPHTHALMIC NANOPARTICLES DRUG DELIVERY SYSTEMS (Ezine Ready)

The relatively high surface resistance, however, encourages electrostatic charges on the surface of moulded parts; this can be largely overcome by the use of antistatic agents. Optical properties PMMA is naturally transparent and colourless. The transmission for visible light is 92%. The refractive index is 1.492 for PMMA. There are types that transmit UV rays, and types that absorb it almost completely, as a result of which sensitive dyes on painted surfaces behind are protected from fading. ·  Chemical Resistance PropertiesPMMA is resistant to aliphatic hydrocarbons, cycloaliphatic compounds, fats and oils, and also to dilute acids at temperatures of up to 60oC. Chlorinated aliphatic hydrocarbons, ketones, alcohols, ethers, esters, aromatics, petrol, spirit, nitrocellulose varnishes and certain plasticisers cause PMMA to swell or produce stress cracks.  The resistance to weathering of PMMA is very good. Natural colour PMMA is crystal clear and has a high surface gloss. It can be produced in all colours, transparent and muted. Health and SafetyPMMA is odorless and tasteless and physiologically safe. USESPMMA or Acrylic is a versatile material and has been used in a wide range of fields and applications. Medical technologies and implantsPMMA has a good degree of compatibility with human tissue, and can be used for replacement intraocular lenses in the eye when the original lens has been removed in the treatment of cataracts. Historically, hard contact lenses were frequently made of this material. Soft contact lenses are often made of a related polymer, where acrylate monomers containing one or more hydroxyl groups make them hydrophilic.

Pages: 1 2 3 4 [5] 6 7 8 9 10 11 12 13 14

Pretty_ comment`s:

In principle, the author successfully published!

01.02.2010

Add comment:

Name:
Sait link:	http://
Your message:
Enter today\\\\'s date, 2 digits (spam protection):

Popular New Drinks on the Block - Glaceau Vitamin Water New Drinks on the Block - Glaceau Vitamin WaterAuthor: Jake SaabAn increasing number of people are becoming more conscious of the amount of vitamin intake that their diet does or does not provide and the need for new products, including vitamin water, that provide a convenient method of obtaining more of the essential vitamins is constantly being sought. One extremely popular brand of vitamin water is Glaceau Vitamin Water. This vitamin water is a low calorie nutrient enhanced water. The vitamin water is available in a number of different flavours and provides an extremely healthy alternative to other high calorie drinks. The Glaceau vitamin water was developed by J. Darius Bikoff who wanted a vitamin enhanced drink that had a pleasant flavour.

News Williamson County Marriage Records - Williamson County Marriage Records By: If you are an accident victim, you do have certain rights under the law in the state of Colorado. By: When people talk about the “California Lemon Law”, what they’re referring to is a subsection of the Song-Beverly Consumer Warranty Act. Concerning motor vehicles, the Song-Beverly Act states, basically, that if a car manufacturer or its authorized representative (i.e. the dealership) is unable to fix your car after a reasonable number of repair attempts so that it meets the terms of its original warranty, you are entitled to receive a complete refund for the car or a new replacement car at no ex By: If you had once been convicted of DUI, you will surely run into situations in the future wherein you will be required to show your record.