In the first of a kind study, plastic surgeons at Georgetown University Medical Center found that when a man chose to have a nip or a tuck on his face, it significantly increased perceptions of attractiveness, likeability, ...
Jul 11, 2019
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A new study from researchers at Max Planck Florida Institute for Neuroscience (MPFI) has shed light on the unexpected mechanism that allows calcium/calmodulin-dependent protein kinase, or CaMKII, to decode and translate calcium ...
Jun 27, 2019
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For longer than she can remember, Hauser Lake, Wash., resident Cindy Crow had symptoms ranging from joint pain and daily headaches to an autoimmune thyroid disorder.
Jun 20, 2019
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The rise of dating websites and apps have changed the dating scene, leading singles to make judgments on potential dates as fast as they can swipe their screen. With about 20 million baby boomers actively using at least one ...
Jun 19, 2019
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Using sound vibrations and pulses of near-infrared light, a Rutgers University scientist has developed a new "virtual biopsy" device that can quickly determine a skin lesion's depth and potential malignancy without using ...
Jun 13, 2019
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Just as women can turn to a suite of procedures, known as the "Mommy Makeover," more men are embracing their own set of treatments, the "Daddy Do-Over," to boost their confidence and improve their physical appearance. A new ...
Jun 12, 2019
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Facial bones in black adults maintain higher mineral density as they age than other races, resulting in fewer changes to their facial structure, a Rutgers study finds.
Jun 05, 2019
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(HealthDay)—When it comes to your home, safety first is a good rule to follow. And there are many steps you can take to limit home accidents.
May 28, 2019
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Until now, researchers have assumed that the growth of solid tumors originates from cancer stem cells characterized by specific surface markers, which develop in a fixed, hierarchical order. Accordingly, such cancer stem ...
May 27, 2019
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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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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
