ANTONIO ROMERO / SCIENCE PHOTO LIBRARY ANTONIO ROMERO / SCIENCE PHOTO LIBRARY
Polarized light micrograph of polyethylene glycol (PEG) crystals. It constitutes a bioinert compound, with many applications in medicine as a laxative, an anti-ulcer agent, and in nerve repair. It also exhibits excitant, anesthetic, and anti-microbial functions. In biological chemistry is used to precipitate proteins, viruses, DNA, and RNA. It is also utilized in encapsulated cell therapy, and as a tissue-regenerating material. As a biomaterial it is used for implantable prostheses, and is among the most common polymer- based nanoparticles; PEG is coupled to various chemotherapeutic drugs such as Taxol to generate novel nanoparticles for cancer therapy. It is the basis of skin creams and an excipient in many pharmaceutical products. PEG is also employed to de-ice aircraft and runways, and in petroleum and lubricant production. Field of view size: 5.
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