News tagged with plastics
(Medical Xpress)—When the brains of those who have succumbed to age-related neurodegeneration are analyzed post-mortem, they typically show significant atrophy on all scales. Not only is the cortex thinner ...
Neuroscience Apr 17, 2013 | 5 / 5 (2) | 0 |
(Medical Xpress)—When the mind is at rest, the electrical signals by which brain cells communicate appear to travel in reverse, wiping out unimportant information in the process, but sensitizing the cells ...
Neuroscience Mar 19, 2013 | 4.9 / 5 (9) | 2 |
Environmental exposure to bisphenol A (BPA), a widespread chemical found in plastics and resins, may suppress a gene vital to nerve cell function and to the development of the central nervous system, according ...
Medical research Feb 25, 2013 | 5 / 5 (6) | 1 |
Animals that are socially isolated for prolonged periods make less myelin in the region of the brain responsible for complex emotional and cognitive behavior, researchers at the University at Buffalo and Mt. Sinai School ...
Neuroscience Nov 11, 2012 | 4.8 / 5 (4) | 0 |
Neuroscientists from New York University and the University of California, Irvine have isolated the "when" and "where" of molecular activity that occurs in the formation of short-, intermediate-, and long-term memories. Their ...
Neuroscience Oct 15, 2012 | 3.5 / 5 (2) | 2 |
(Medical Xpress) -- Synapses are modified through learning. Up until now, scientists believed that a particular form of synaptic plasticity in the brains hippocampus was responsible for learning spatial ...
Neuroscience Jul 19, 2012 | 5 / 5 (1) | 0 |
UCLA stem cell scientists purified a subset of stem cells found in fat tissue and made from them bone that was formed faster and was of higher quality than bone grown using traditional methods, a finding that may one day ...
Medical research Jun 11, 2012 | 1 / 5 (1) | 0 |
The brain receives information from the ear in a surprisingly orderly fashion, according to a University at Buffalo study scheduled to appear June 6 in the Journal of Neuroscience.
Neuroscience Jun 05, 2012 | 4.8 / 5 (8) | 1 |
Phthalates: Study links chemicals widely found in plastics, processed food to elevated blood pressure in children, teens
Plastic additives known as phthalates (pronounced THAL-ates) are odorless, colorless and just about everywhere: They turn up in flooring, plastic cups, beach balls, plastic wrap, intravenous tubing and—according to the ...
Pediatrics 19 hours ago | not rated yet | 1 |
(Medical Xpress)—Scientists from the United States and Australia have advanced our understanding of brain plasticity by showing that the brain forms complex new circuits after damage, often far from the ...
Neuroscience May 15, 2013 | 4.3 / 5 (8) | 0 |
A research team led by Dr. Robert Hess from McGill University and the Research Institute of the McGill University Health Centre (RI-MUHC) has used the popular puzzle video game Tetris in an innovative approach to treat adult ...
Diseases, Conditions, Syndromes Apr 22, 2013 | 5 / 5 (1) | 0 |
Evidence indicates that the accumulation of amyloid-beta proteins, which form the plaques found in the brains of Alzheimer's patients, is critical for the development of Alzheimer's disease, which impacts 5.4 million Americans. ...
Alzheimer's disease & dementia Apr 18, 2013 | 4.7 / 5 (3) | 1 |
Researchers see more realistic tumor growth and response to anti-cancer drugs using polymer scaffolds
(Medical Xpress)—Porous polymer scaffolds fabricated to support the growth of biological tissue for implantation may hold the potential to greatly accelerate the development of cancer therapeutics.
Cancer Apr 02, 2013 | 3 / 5 (1) | 0 |
The flip of a single molecular switch helps create the mature neuronal connections that allow the brain to bridge the gap between adolescent impressionability and adult stability. Now Yale School of Medicine ...
Neuroscience Mar 06, 2013 | 5 / 5 (5) | 0 |
Neuroscientists should help to develop compelling digital games that boost brain function and improve well-being, say two professors specializing in the field in a commentary article published in the science journal Nature.
Psychology & Psychiatry Feb 27, 2013 | 3.7 / 5 (3) | 1 |
A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs. Monomers of plastic are either natural or synthetic organic compounds.
The word plastic is derived from the Greek πλαστικός (plastikos) meaning capable of being shaped or molded, from πλαστός (plastos) meaning molded. It refers to their malleability, or plasticity during manufacture, that allows them to be cast, pressed, or extruded into a 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 which is stamped or forged, for instance, exhibits plasticity in this sense, but is not plastic in the common sense; in contrast, in their finished forms, some plastics will break before deforming and therefore are not plastic in the technical sense.
There are two types of plastics: thermoplastics and thermosetting polymers. Thermoplastics are the plastics that do not undergo chemical change in their composition when heated and can be moulded again and again; examples are polyethylene, polypropylene, polystyrene, polyvinyl chloride and polytetrafluoroethylene (PTFE). Thermosets can melt and take shape once; after they have solidified, they stay solid.
The raw materials needed to make most plastics come from petroleum and natural gas.
For more information about Plastic, read the full article at
This text uses material from Wikipedia and is available under the GNU Free Documentation License.