A new anatomic study highlights critical technical issues to ensure safe performance of the increasingly popular "Brazilian butt lift—a procedure using the patient's own fat to augment and improve the appearance of the ...
May 16, 2019
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The human brain is "plastic": it can adapt and rewire itself, often more easily when learning new things related to familiar skills. For example, it is probably easier for a professional tennis player to learn to play badminton ...
May 02, 2019
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UCLA Extension's Ochan Otim is a chemist who specializes in developing methods for quantifying and assessing the health risk associated with organic and metal contaminants in the environment. For the last few years, Otim, ...
Apr 02, 2019
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Remember hearing people being called slow learners by teachers and parents? That oft-used description of someone who takes a wee bit longer to process information, now has a scientific basis for its existence. Scientists ...
Mar 27, 2019
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(HealthDay)—The 2019 Main Residency Match was the largest in history, with a record high of 38,376 applicants for 35,185 positions, according to 2019 Match Day results released by the National Resident Matching Program.
Mar 25, 2019
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Humans are not only capable of forming memories but also recalling these memories years later. However, with advancing age many of us face difficulties with forming new memories, a process usually referred to as age-induced ...
Mar 22, 2019
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(HealthDay)—More than 17.7 million surgical and minimally invasive cosmetic procedures were performed in the United States in 2018, with an increasing trend seen in body-shaping procedures, according to a report published ...
Mar 11, 2019
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New data released by the American Society of Plastic Surgeons (ASPS) shows there were nearly a quarter million more cosmetic procedures performed in 2018 than the previous year. According to the ASPS annual plastic surgery ...
Mar 11, 2019
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(HealthDay)—Persistent and prolonged opioid use occur after plastic and reconstructive surgical procedures, according to a study published online March 7 in JAMA Facial Plastic Surgery.
Mar 08, 2019
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While the proportion of women entering plastic surgery residency programs has increased in recent years, numbers of Black and Hispanic trainees are declining or unchanged, reports a study in the March issue of Plastic and ...
Feb 28, 2019
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Plastic is the general common term for a wide range of synthetic or semisynthetic organic amorphous solid materials suitable for the manufacture of industrial products. Plastics are typically polymers of high molecular weight, and may contain other substances to improve performance and/or reduce costs.
The word derives from the Greek πλαστικός (plastikos) meaning fit for molding, and πλαστός (plastos) meaning molded. It refers to their malleability, or plasticity during manufacture, that allows them to be cast, pressed, or extruded into an enormous variety of shapes—such as films, fibers, plates, tubes, bottles, boxes, and much more.
The common word plastic should not be confused with the technical adjective plastic, which is applied to any material which undergoes a permanent change of shape (plastic deformation) when strained beyond a certain point. Aluminum, for instance, is plastic in this sense, but not a plastic in the common sense; while some plastics, in their finished forms, will break before deforming and therefore are not plastic in the technical sense.
There are two types of plastics: thermoplastics and thermosets. Thermoplastics, if exposed to enough heat, will melt. Thermosets will keep their shape until they are charred and burnt. Some examples of thermoplastics are grocery bags, piano keys and some automobile parts. Examples of thermosets are children's dinner sets and circuit boards.
This text uses material from Wikipedia, licensed under CC BY-SA
