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Ethylene-vinyl Acetate
Ethylene-vinyl acetate (EVA), also known as poly (ethylene-vinyl acetate) (PEVA), is the copolymer of ethylene and vinyl acetate. The weight percent of vinyl acetate usually varies from 10 to 40%, with the remainder being ethylene. There are three different types of EVA copolymer, which differ in the vinyl acetate (VA) content and the way the materials are used. The EVA copolymer which is based on a low proportion of VA (approximately up to 4%) may be referred to as vinyl acetate modified polyethylene. It is a copolymer and is processed as a thermoplastic material – just like low density polyethylene. It has some of the properties of a low density polyethylene but increased gloss (useful for film), softness and flexibility. The material is generally considered non-toxic. The EVA copolymer, which is based on a medium proportion of VA (approximately 4 to 30%), is referred to as thermoplastic ethylene-vinyl acetate copolymer and is a thermoplastic elastomer material. It is no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eva Closeup
Eva or EVA may refer to: * Eva (name), a feminine given name Arts, entertainment, and media Fictional characters * Eva (Dynamite Entertainment), a comic book character by Dynamite Entertainment * Eva (''Devil May Cry''), Dante's mother in the ''Devil May Cry'' video game series * Eva (''Metal Gear''), a fictional character in the ''Metal Gear'' video games series * Evangelion (mecha), commonly referred to as "Eva" or "EVA", a fictional cyborg in the ''Neon Genesis Evangelion'' franchise Films * ''Eva'' (1948 film), a Swedish film * ''Eva'' (1953 film), a Greek drama film * ''Eva'' (1958 film), an Austrian film * ''Eva'' (1962 film), a French-Italian film in English * ''Eva'' (2010 film), an English-language Romanian film * ''Eva'' (2011 film), a Spanish film * ''Eva'' (2018 film), a French film Music Artists *Eva (singer), French singer * E.V.A. (band) (Eve Versus Adam), an Italian female pop band * Banda Eva, a Brazilian axé band formerly fronted by Ivete Sang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dichloromethane
Dichloromethane (DCM or methylene chloride, methylene bichloride) is an organochlorine compound with the formula . This colorless, volatile liquid with a chloroform-like, sweet odour is widely used as a solvent. Although it is not miscible with water, it is slightly polar, and miscible with many organic solvents.Rossberg, M. ''et al.'' (2006) "Chlorinated Hydrocarbons" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim. . Occurrence Natural sources of dichloromethane include oceanic sources, macroalgae, wetlands, and volcanoes. However, the majority of dichloromethane in the environment is the result of industrial emissions. Production DCM is produced by treating either chloromethane or methane with chlorine gas at 400–500 °C. At these temperatures, both methane and chloromethane undergo a series of reactions producing progressively more chlorinated products. In this way, an estimated 400,000 tons were produced in the US, Europe, and Japan in 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drug Delivery
Drug delivery refers to approaches, formulations, manufacturing techniques, storage systems, and technologies involved in transporting a pharmaceutical compound to its target site to achieve a desired therapeutic effect. Principles related to drug preparation, route of administration, site-specific targeting, metabolism, and toxicity are used to optimize efficacy and safety, and to improve patient convenience and compliance. Drug delivery is aimed at altering a drug's pharmacokinetics and specificity by formulating it with different excipients, drug carriers, and medical devices. There is additional emphasis on increasing the bioavailability and duration of action of a drug to improve therapeutic outcomes. Some research has also been focused on improving safety for the person administering the medication. For example, several types of microneedle patches have been developed for administering vaccines and other medications to reduce the risk of needlestick injury. Drug deli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biomedical Engineering
Biomedical engineering (BME) or medical engineering is the application of engineering principles and design concepts to medicine and biology for healthcare purposes (e.g., diagnostic or therapeutic). BME is also traditionally logical sciences to advance health care treatment, including diagnosis, monitoring, and therapy. Also included under the scope of a biomedical engineer is the management of current medical equipment in hospitals while adhering to relevant industry standards. This involves procurement, routine testing, preventive maintenance, and making equipment recommendations, a role also known as a Biomedical Equipment Technician (BMET) or as clinical engineering. Biomedical engineering has recently emerged as its own study, as compared to many other engineering fields. Such an evolution is common as a new field transition from being an interdisciplinary specialization among already-established fields to being considered a field in itself. Much of the work in biomedica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plastic Wrap
Plastic wrap, cling film, Saran wrap, cling wrap, Glad wrap or food wrap is a thin plastic film typically used for sealing food items in containers to keep them fresh over a longer period of time. Plastic wrap, typically sold on rolls in boxes with a cutting edge, clings to many smooth surfaces and can thus remain tight over the opening of a container without adhesive. Common plastic wrap is roughly 0.0005 inches (12.7 μm) thick. The trend has been to produce thinner plastic wrap, particularly for household use (where very little stretch is needed), so now the majority of brands on shelves around the world are 8, 9 or 10 μm thick. Materials used Plastic wrap was initially created from polyvinyl chloride (PVC), which remains the most common component globally. PVC has an acceptably-low permeability to water vapor and oxygen, helping to preserve the freshness of food. There are concerns about the transfer of plasticizers from PVC into food. Pliofilm was made of various kind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resin
In polymer chemistry and materials science, resin is a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers. Resins are usually mixtures of organic compounds. This article focuses on naturally occurring resins. Plants secrete resins for their protective benefits in response to injury. The resin protects the plant from insects and pathogens. Resins confound a wide range of herbivores, insects, and pathogens, while the volatile phenolic compounds may attract benefactors such as parasitoids or predators of the herbivores that attack the plant. Composition Most plant resins are composed of terpenes. Specific components are alpha-pinene, beta-pinene, delta-3 carene, and sabinene, the monocyclic terpenes limonene and terpinolene, and smaller amounts of the tricyclic sesquiterpenes, longifolene, caryophyllene, and delta-cadinene. Some resins also contain a high proportion of resin acids. Rosins on the other hand are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cleat (shoe)
Cleats or studs are protrusions on the sole of a shoe or on an external attachment to a shoe that provide additional traction on a soft or slippery surface. They can be conical or blade-like in shape and can be made of plastic, rubber or metal. The type worn depends on the environment of play: grass, ice, artificial turf, or other grounds. In American English, the term "cleats" is used synecdochically to refer to shoes featuring such protrusions. History It is thought that during the Roman Empire, Roman legionaries wore studded sandals that resembled cleats. The caligae (as they were called) were heavy-soled hobnailed military sandal- boots known for being issued to legionary soldiers and auxiliaries throughout the Roman Republic and Empire. Athletes have worn cleats since at least the 1500s. Although there are no images or surviving examples of cleats from that time period, the first written documentation of cleats comes from 1526, when "football boots" were listed in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hot Melt Adhesive
Hot-melt adhesive (HMA), also known as hot glue, is a form of thermoplastic adhesive that is commonly sold as solid cylindrical sticks of various diameters designed to be applied using a hot glue gun. The gun uses a continuous-duty heating element to melt the plastic glue, which the user pushes through the gun either with a mechanical trigger mechanism on the gun, or with direct finger pressure. The glue squeezed out of the heated nozzle is initially hot enough to burn and even blister skin. The glue is sticky when hot, and solidifies in a few seconds to one minute. Hot-melt adhesives can also be applied by dipping or spraying, and are popular with hobbyists and crafters both for affixing and as an inexpensive alternative to resin casting. In industrial use, hot-melt adhesives provide several advantages over solvent-based adhesives. Volatile organic compounds are reduced or eliminated, and the drying or curing step is eliminated. Hot-melt adhesives have a long shelf life and usu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yoga Block
A yoga brick or yoga block is a smooth block of wood or of firm but comfortable material, such as hard foam rubber or cork, used as a prop in yoga as exercise. The use of wooden bricks to assist in alignment was introduced by B. K. S. Iyengar, founder of Iyengar Yoga, and has spread to practices such as Restorative Yoga and Yin Yoga. History B. K. S. Iyengar, who founded Iyengar Yoga in the 1970s, introduced the use of yoga props including bricks and straps to assist his students towards correct alignment in the asanas. He recommended that yoga bricks be similar in size to a house brick, 9 x 4.5 x 3 inches (22.5 x 11 x 7.5 cm) in size. Iyengar yoga institutions sell unbranded props such as bricks, belts, bolsters and blankets. Considerations Yoga bricks are manufactured in a variety of materials, sizes, and colours. Lydia Willgress, writing in ''The Independent'', states that the key considerations are the hardness of the material, which influences the comfort and suppor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosplay
Cosplay, a portmanteau of "costume play", is an activity and performance art in which participants called cosplayers wear costumes and fashion accessories to represent a specific character. Cosplayers often interact to create a subculture, and a broader use of the term "cosplay" applies to any costumed role-playing in venues apart from the stage. Any entity that lends itself to dramatic interpretation may be taken up as a subject. Favorite sources include anime, cartoons, comic books, manga, television series, and video games. The term is composed of the two aforementioned counterparts – costume and role play. Cosplay grew out of the practice of fan costuming at science fiction conventions, beginning with Morojo's "futuristicostumes" created for the 1st World Science Fiction Convention held in New York City in 1939. The Japanese term was coined in 1984. A rapid growth in the number of people cosplaying as a hobby since the 1990s has made the phenomenon a significan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crocs
Crocs, Inc. (stylized in all lowercase) is an American footwear company based in Broomfield, Colorado, that manufactures and markets the Crocs brand of foam clogs. History Crocs was founded by Lyndon "Duke" Hanson, and George Boedecker Jr. to produce and distribute a foam clog, whose design they acquired from Foam Creations, Inc. of Quebec City. The shoe was originally developed as a boating shoe. The first model produced by Crocs, the ''Beach'', was unveiled in 2001 at the Fort Lauderdale Boat Show in Florida, and the 200 pairs that they had produced were all sold.Wellington, Elizabeth (July 5, 2007"Fashion Attack" ''The Philadelphia Inquirer''. Retrieved August 25, 2007. Crocs has since sold 300 million pairs of shoes. In June 2020, Crocs moved the headquarters from Niwot, Colorado, to Broomfield. Crocs completed an initial public offering of its common stock in February 2006. It began trading on the NASDAQ Stock Market under the symbol CROX. On October 30, 2007, the stock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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