High Quality Content by WIKIPEDIA articles! Polycrystalline silicon photovoltaics are a type of solar cell. Silicon solar cells are manufactured with a microstructure tailored to the application depending on economic and performance requirements.
High Quality Content by WIKIPEDIA articles! Adsorption of polyelectrolytes on solid substrates is a surface phenomenon where long-chained polymer molecules with charged groups (dubbed polyelectrolytes) bind to a surface that is charged in the opposite polarity. On the molecular level, the polymers do not actually bond to the surface, but tend to "stick" to the surface via intermolecular forces and the charges created by the dissociation of various side groups of the polymer. Because the polymer molecules are so long, they have a large amount of surface area with which to contact the surface and thus do not desorb as small molecules are likely to do. This means that adsorbed layers of polyelectrolytes form a very durable coating. Due to...
High Quality Content by WIKIPEDIA articles! Polyester is a category of polymers which contain the ester functional group in their main chain. Although there are many polyesters, the term "polyester" as a specific material most commonly refers to polyethylene terephthalate (PET). Polyesters include naturally occurring chemicals, such as in the cutin of plant cuticles, as well as synthetics through step-growth polymerization such as polycarbonate and polybutyrate. Natural polyesters and a few synthetic ones are biodegradable, but most synthetic polyesters are not.
High Quality Content by WIKIPEDIA articles! Polymer chemistry or macromolecular chemistry is a multidisciplinary science that deals with the chemical synthesis and chemical properties of polymers or macromolecules. According to IUPAC recommendations, macromolecules refer to the individual molecular chains and are the domain of chemistry. Polymers describe the bulk properties of polymer materials and belong to the field of polymer physics as a subfield of physics.
High Quality Content by WIKIPEDIA articles! Polymeric materials have widespread application due to their versatile characteristics, cost-effectiveness, and highly tailored production. The science of polymer synthesis allows for excellent control over the properties of a bulk polymer sample. However, surface interactions of polymer substrates are an essential area of study in biotechnology, nanotechnology, and in all forms of coating applications. In these cases, the surface characteristics of the polymer material largely determine its utility and reliability. In biomedical applications for example, the bodily response to foreign material, and thus biocompatibility, is governed by surface interactions. In addition, surface science is...
High Quality Content by WIKIPEDIA articles! In polymer chemistry, polymerization is a process of reacting monomer molecules together in a chemical reaction to form three-dimensional networks or polymer chains. There are many forms of polymerization and different systems exist to categorize them.
High Quality Content by WIKIPEDIA articles! Adsorption is the adhesion of ions or molecules onto the surface of another phase. Adsorption may occur via physisorption and chemisorption. Ions and molecules can adsorb to many types of surfaces including polymer surfaces. A polymer is a large molecule composed of repeating subunits bound together by covalent bonds. The adsorption of ions and molecules to polymer surfaces plays a role in many applications including: biomedical, structural, and coatings.
High Quality Content by WIKIPEDIA articles! Polyoxymethylene (POM), also known as acetal,polyacetal and polyformaldehyde, is an engineering thermoplastic used in precision parts requiring high stiffness, low friction and excellent dimensional stability. As with many other synthetic polymers, it is produced by different chemical firms with slightly different formulas and sold variously by such names as Delrin, Celcon and Hostaform.
High Quality Content by WIKIPEDIA articles! Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that finds numerous applications. PTFE is most well known by the DuPont brand name Teflon.
High Quality Content by WIKIPEDIA articles! A polyurethane (PUR and PU) is any polymer composed of a chain of organic units joined by carbamate (urethane) links. Polyurethane polymers are formed through step-growth polymerization, by reacting a monomer (with at least two isocyanate functional groups) with another monomer (with at least two hydroxyl or alcohol groups) in the presence of a catalyst.
ISBN: 978-5-5111-3445-1
Дата выхода: сентябрь 2012
High Quality Content by WIKIPEDIA articles! The Pond Eddy Bridge is a petit truss bridge spanning the Delaware River between the hamlet of Pond Eddy in Lumberland, New York and the settlement informally called Pond Eddy in Shohola Township, Pennsylvania. It is accessible from NY 97 in Lumberland on the New York side and two dead-end local roads, Flagstone Road (State Route 1011) and Rosa Road on the Pennsylvania side. The bridge was built in 1903 by the Oswego Bridge Company to replace an old suspension bridge that had washed away in a flood earlier in the year. It connected the bluestone quarries in Pennsylvania to New York.
High Quality Content by WIKIPEDIA articles! The Pont-y-Cafnau (English: Bridge of Troughs), sometimes written Pont y Cafnau or Pontycafnau, is a 14.2-metre (47 ft) long iron truss bridge over the River Taff in Merthyr Tydfil, Wales. The bridge was designed by Watkin George and built in 1793 for his employer, the Cyfarthfa Ironworks, to support both a tramway and an aqueduct to carry limestone and water into the works. A Grade II* listed building and Scheduled Ancient Monument, the Pont-y-Cafnau is the world`s earliest surviving iron railway bridge.
High Quality Content by WIKIPEDIA articles! Ponte Sant`Angelo, once the Aelian Bridge or Pons Aelius, meaning the Bridge of Hadrian, is a Roman bridge in Rome, Italy, completed in 134 AD by Roman Emperor Hadrian, to span the Tiber, from the city center to his newly constructed mausoleum, now the towering Castel Sant`Angelo. The bridge is faced with travertine marble and spans the Tiber with three arches; it was approached by means of ramp from the river. The bridge is now solely pedestrian, and provides a photogenic vista of the Castel Sant`Angelo. It links the rioni of Ponte (which was named after the bridge itself), and Borgo.
High Quality Content by WIKIPEDIA articles! Ponte Vedra Beach is an unincorporated seaside community in St. Johns County, Florida, United States. Located eighteen miles (29 km) southeast of downtown Jacksonville and 26 miles (42 km) north of St. Augustine, it is part of the Jacksonville Beaches area. It is an upmarket tourist resort area best known for its association with golf. The Sawgrass development is the home of the ATP Tour, the PGA Tour, and The Players Championship, played at the TPC at Sawgrass.
High Quality Content by WIKIPEDIA articles! Pontis is a software application developed to assist in managing highway bridges and other structures. Pontis stores bridge inspection and inventory data based on the U.S. Federal Highway Administration (FHWA) National Bridge Inventory System (NBIS) coding guidelines. In addition, the system stores condition data for each of a bridge`s structural elements.
High Quality Content by WIKIPEDIA articles! Pontyclun railway station is an unstaffed, minor railway station in Pontyclun, in the County Borough of Rhondda Cynon Taf, South Wales. The station is at street level, on Station Approach, Pontyclun. It is a stop on the South Wales Main Line, served by trains on the Maesteg Line, and occasionally by the Swanline Cardiff to Swansea regional services, as well as one early-morning daily service to Manchester and a late-night daily service to Carmarthen. The station and all trains are operated by Arriva Trains Wales.
High Quality Content by WIKIPEDIA articles! Poplin, also called tabinet (or tabbinet), is a strong fabric in a plain weave of any fiber or blend, with crosswise ribs that typically gives a corded surface.
High Quality Content by WIKIPEDIA articles! Port Colborne (2011 population 18,424) is a city on Lake Erie, at the southern end of the Welland Canal, in the Niagara Region of southern Ontario, Canada. The original settlement, known as Gravelly Bay, dates from 1832 and was renamed after Sir John Colborne, a British war hero and the Lieutenant Governor of Upper Canada at the time of the opening of the southern terminus of the First Welland Canal in 1833.
High Quality Content by WIKIPEDIA articles! Port Charles, New York is the fictional setting of the ABC Daytime soap operas General Hospital and its spin-offs Port Charles and General Hospital: Night Shift. It was revealed that the Queen`s Point setting of The Young Marrieds, a short-lived sister series to General Hospital that ran between 1964 and 1966, was a suburb of Port Charles. Locations within the town are described, below, using in-universe tone.