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Tag: "polymers" at medical news

A non-stick danger

...s one of a class of chemicals known as fluorinated polymers whose non-stick properties are exploited in cookin... combustion engines. However, when heated, these polymers can emit a chemical known as trifluoroacetic acid (TFA) which is toxic to plants and does not break ...

Smart Plastic As Surigical Thread

... bone screws. The material, made of thermoplastic polymers that an be absorbed by the body, an be engineered// to assume s string-like shape at room temperature and then transform into a medially useful shape when warmed by body temperature, said Robert Langer, o-author of a study in the journal Science. La...

Bisphenol A In Food Containers Has Adverse Effect On Brain Tissue

...ts in fetus. BPA molecules are linked to form polymers used in polycarbonate plastics and epoxy resins but these chemical linkage are unstable and the BPA leaches into the food that comes in contact with the plastic. The problem now associated with this low-dose effect is that deteriorating effect of ...

Food packaging with Bisphenol A damages the brain

...ctive functions,' 'BPA molecules are linked into polymers used to create polycarbonate plastics and epoxy resins that are widely used in many products,' said Dr. Belcher. 'While plastics are typically thought of as being stable, scientists have known for many years that the chemical linkage between BPA mole...

PFCAs Detected in the Artic

Fluorinated polymers have become a great danger in the environment and ...emicals for the past five years. These fluorinated polymers degrade and eventually become a group of nasty chemicals called PFCAs for perfluorocarboxylates. ...

Polymer Molecule Layered On Carb Molecule to Increase Sensitivity

...e in and come into contact with the enzymes." "The polymers trap the enzymes in place," Liu said. "You can go up to five or six layers to improve the sensitivity of the detector, but after that, the more enzyme layers" inhibit diffusion of the glucose. Now that the glucose enzyme biosensor has passed the te...

Fine Polymer Scaffolding – a Boon for Skin Reconstructio

... to help them grow in a safe, natural way.’ The polymers used in the scaffold are biodegradable materials a... be 'dumb' (i.e. not overly sophisticated), simple polymers can be used. The process for making the scaffolds is based on the well-known technique of electros...

Solitons Could Power Molecular Electronics, Artificial Muscles

...harge through organic materials such as conducting polymers at the molecular level. "These extra electronic states will have an effect -- we just don't know right now if it will be for better or worse," he said. Li and his longtime collaborators from MIT published their findings in a recent issue of the ...

Microcapsules target cancer cells

...ogether charged metal nanoparticles along with the polymers composing the walls of the vesicle. The tumour cel...hey became so hot that the bonds broke between the polymers and the shell and the capsules eventually opened. For the time being, the scientists have only be...

Plastic pill – a new treatment for periodontal disease

...o facilitate healing and tissue regeneration. "The polymers that Kathryn Uhrich and her team have pioneered and developed are unique in that they can serve as barriers while also repressing any inflammatory response, setting the stage for nature to not only heal these areas, but also to regenerate the tissues...

Synthetic DNA Makes Better Hydrogels for Drug Delivery

...urposes are usually made from organic or inorganic polymers (molecules that form long chains), such as alginate from seaweed. Some have been made from proteins but none entirely from ordinary DNA. So far, all these processes have used organic solvents or acids or involve high temperatures, making conditions t...

New Generation - Medicinal Products

...ly increases their diversity. Some biodegradable polymers such as polyesters have already been employed as e... now, we only knew how to make these biodegradable polymers using two monomers (the basic components of polymers), lactide and glycolide. It is rather like maki...

Black and White in ‘Shades of Grey

...sly present in people with red hair. Eumelanin polymers are found in the hair and skin of dark-skinned peo...melanin. Decreased quantity of the black eumelanin polymers leads to the graying of the hair, while a decrease in the brown eumelanin results in blond or yellow...

A New Test Kit to Detect Spoilt Food

...lage. Lavigne and his associates developed special polymers that change color in the presence of these biogeni...ng fresh salmon, fresh tuna and canned tuna. The polymers change color in the presence of increasing levels of these biogenic amines to indicate degrees of fo...

Nanoparticle in the Treatment of Glaucoma

... makes them less abrasive than some of the complex polymers now used in most eye drops. Seal and his team created a specialized cerium oxide nanoparticle and bound it with a compound that has been shown to block the activity of an enzyme (hCAII) believed to play a central role in causing glaucoma. The dis...

Attempt to Build Artificial Muscles from Carbon Nanofibres in the Offing

...sing artificial muscles are based on electroactive polymers (EAPs) - plastics that change shape when activated electrically or with chemicals. But they lack mechanical robustness and as a result soon succumb to fatigue and fail. To test the nanotubes ability to resist fatigue, the team led by Victor Pushparaj...

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