manufacturing the first CR-39 eyeglass lenses in 1947. CR-39 plastic has an index of refraction of 1.498 and an Abbe number of 58. CR-39 is now a trade-marked...

Thinner, sometimes lighter lenses (See below). Improved UV protection over CR-39 and glass lenses. Lower Abbe number, meaning, amongst other things, increased...

interchanges with CR 38 (North Sea Road) and CR 39 (County Road), CR 79 (Bridgehampton–Sag Harbor Road), NY 114 (East Hampton–Sag Harbor Turnpike), CR 40 (Three...

called the first scientific report of highly energetic neutrons, using CR-39 plastic radiation detectors, but the claims cannot be validated without...

Pine County, Minnesota, United States. Within Pine County, a County Road (CR) is referred to as a "Highway" if a sealed road and "Road" if an improved...

following 500-series county routes serve Bergen County: CR 501, CR 502, CR 503, CR 504, CR 505, CR 507 Bergen County has one of the longest-lasting county...

used in SSNTDs is polyallyl diglycol carbonate (also known as Tastrak, or CR-39). It is a clear, colorless, rigid plastic with the chemical formula C12H18O7...

Road 39A" for the street name, it commonly known as part of CR 39. The entire route is signed as CR 39. Major intersections County Route 39B is Canal Road East...

Brazilian Portuguese). Retrieved 14 March 2019. "Rio de la Plata trip of CR Flamengo (Rio de Janeiro) 1933". Rec.Sport.Soccer Statistics Foundation. Retrieved...

Polaroid filter. In 1947, the Armorlite Company began producing lenses with CR-39 resin. At present, Xiamen, China is the world's largest producer of sunglasses...

the turnpike enters an interchange with Route 140 and County Route 540 (CR 540). Through this section, the turnpike has three northbound lanes and two...

prospects for bioremediation. However, this effect has not been reproduced. CR-39, allyl diglycol carbonate (ADC) used for eyeglasses Mobile phone accessories...

used to produce the lenses: Although relatively durable inside of frames, CR-39 lacks impact resistance and cannot absorb the wear and tear of constant...

than references for inventory purposes. One county route, County Route 91 (CR 91), has route markers posted along its length; however, the signs display...

The Honda CR-Z is a sport compact hybrid electric car manufactured by Honda and marketed as a "sport hybrid coupe." The CR-Z combines a hybrid gasoline-electric...

The Fiat CR.42 Falco (Falcon, plural: Falchi) is a single-seat sesquiplane fighter developed and produced by Italian aircraft manufacturer Fiat Aviazione...

pass through a nuclear track detector made of plastic such as cellulose or CR-39. The ions produce trails of chemical damage called ion tracks. An acid bath...

neurological disorder associated with HIV and AIDS Allyl diglycol carbonate or CR-39, a polymer Antibody-drug conjugate, a type of anticancer treatment Apparent...

Line and Montclair-Boonton Line before coming to an intersection with CR 517. Here, CR 517 forms a concurrency with US 46, and the two routes continue southeast...

from glass, resin plastics similar to those used for eyeglasses (such as CR-39), polyester and polycarbonate; sometimes acetate is used. Historically,...

can be used for high index glass that isn't easily spin molded, as the CR-39 resin lens is. Techniques such as laser ablation can also be used to modify...

State Road 582, but unlike CR 580, crosses over into Polk County. After passing by the Blackwater Ultralight Flightpath, SR 39 and the Yeoman Subdivision...

Chromium is a chemical element; it has symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle...

County Road 39 (CR 39) north of Irvington. The highway crosses the Fowl River and curves more northeast through a diamond interchange with CR 30 (Theodore...

automatique de 7,65 mm long modèle 1935 S Fusil de 7,5 mm modèle MAS 36 CR 39 Fusil d'entraînement MAS 36 de 5,5mm (.22 LR) Fusil d'entraînement MAS 45...

designed to slow the progression of myopia. Orma – Essilor's branding of the CR-39 lens material. Transitions – #1 selling brand of photochromic lenses. Formerly...

route shields, serving as little more than references for inventory purposes. CR 45–56 served as spurs to the county's recycling facilities. County routes...

is mostly county-maintained as County Route 80 and County Route 85 (CR 80 and CR 85, respectively). The highway was one of the original through highways...

Manzanares (Cr 1 Cl 39) Estación Fátima (Cr 1 Cl 30) Estación Río Cali (Cr 4n Cl 23) Estación Piloto (Cr 1 Cl 24) Estación San Nicolás (Cr 1 Cl 21) List...

be made either of tempered glass or one of the available lens plastics, CR-39 or polycarbonate." The strength of these materials was deemed to be shatter-resistant...