Teenagers are known for their sometimes-unpredictable behavior. One moment they're mature and clear-thinking, and the next they're irrational or engaging in risky behavior. Neurologically speaking, they can't help it, though ...
Apr 2, 2024
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Parents voice strong concerns about social media sharing of images of children undergoing craniofacial surgery, reports a survey study in the April issue of Plastic and Reconstructive Surgery.
Apr 1, 2024
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Using state-of-the-art tissue engineering techniques and a 3D printer, researchers at Weill Cornell Medicine and Cornell Engineering have assembled a replica of an adult human ear that looks and feels natural. The study, ...
Mar 30, 2024
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For patients considering or undergoing plastic and reconstructive surgery (PRS) procedures, using social media to gather information and answer questions can enhance patient empowerment—potentially leading to increased ...
Mar 28, 2024
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A new study describes a novel surgical technique used to treat Moebius syndrome, a rare congenital condition leading to the inability to smile, oral incompetence, and a significant impact on social engagement. The study is ...
Mar 27, 2024
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A researcher at the University of Basel, in collaboration with a colleague in Austria, has developed a new model that provides a holistic view on how our brain manages to learn quickly and forms stable, long-lasting memories. ...
Mar 21, 2024
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Does your water bottle only get washed once or twice a week—or even less?
Mar 21, 2024
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Researchers have identified a new mediator responsible for altering fear memories. This discovery could contribute to the creation of new and more effective therapies for the treatment of anxiety disorders, one of the most ...
Mar 18, 2024
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A recent study suggests that mushroom extract containing psilocybin may exhibit superior efficacy when compared to chemically synthesized psilocybin. The findings are published in the journal Molecular Psychiatry.
Mar 11, 2024
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The gastrointestinal tract is already known to researchers as a major storage site for micro- and nanoplastic particles (MNPs) in the human body. A research consortium consisting of the University of Vienna, the Medical University ...
Mar 6, 2024
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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
