Addiction, or substance use disorder (SUD), is a complex neurological condition that includes drug-seeking behavior among other cognitive, emotional and behavioral features. Synaptic plasticity, or changes in the way neurons ...
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Amazon is now selling COVID-19 tests for customers to use at home as cases continue to rise in the U.S.
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Platelet-rich plasma (PRP) treatment, which involves injecting a small amount of a patient's own blood to release various growth factors from platelets, continues to increase in popularity. The American Society of Plastic ...
Dec 28, 2020
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Made in clandestine laboratories and sold widely across the United States, the diverse class of drugs known as synthetic cannabinoids presents a growing public health threat.
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Plastics contain and leach hazardous chemicals, including endocrine-disrupting chemicals (EDCs) that threaten human health. An authoritative new report, Plastics, EDCs, & Health, from the Endocrine Society and the IPEN (International ...
Dec 15, 2020
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Researchers at the HSE Institute for Cognitive Neuroscience have shown experimentally that economic activity can actively change the brain. Signals that predict regular financial losses evoke plastic changes in the cortex. ...
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Neurological diseases of the brain such as dementia, autism and schizophrenia are now a growing social problem. Nevertheless, studies on their definitive cause are still insufficient. Recently, a POSTECH research team has ...
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Patients are seeking plastic surgery in record numbers, citing their appearance on Zoom as a cause. Of particular concern are noses and wrinkles, according to Facial Plastic Surgery & Aesthetic Medicine.
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Osteoarthritis (OA), a widely acknowledged cause of disability that affects patients' quality of life and has significant economic impact through healthcare costs and loss of earnings. In a novel study researchers have identified ...
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Interventional radiologists with Nemours Children's Health System have identified a new source of abnormal lymphatic flow between the liver and the lungs that may be responsible for some cases of plastic bronchitis. Plastic ...
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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
