![]() ![]() The paint would subsequently flake off in about four minutes. Within 15 seconds of the terra-cotta pieces being unearthed during excavations, the lacquer beneath the paint begins to curl after being exposed to the dry Xi'an air. These painted artifacts were created during the Qin Shi Huang (first emperor of China) era. PEG has been used to preserve the painted colors on Terracotta Warriors unearthed at a UNESCO World Heritage site in China.In addition, PEG is used when working with green wood as a stabilizer, and to prevent shrinkage. It replaces water in wooden objects, making the wood dimensionally stable and preventing warping or shrinking of the wood when it dries. ![]() PEG is frequently used to preserve waterlogged wood and other organic artifacts that have been salvaged from underwater archaeological contexts, as was the case with the warship Vasa in Stockholm, and similar cases.Polyethylene glycol is also commonly used as a polar stationary phase for gas chromatography, as well as a heat transfer fluid in electronic testers.These properties make PEG one of the most useful molecules for applying osmotic pressure in biochemistry and biomembranes experiments, in particular when using the osmotic stress technique. It also is unlikely to have specific interactions with biological chemicals. ![]() Since PEG is a flexible, water-soluble polymer, it can be used to create very high osmotic pressures (on the order of tens of atmospheres).The polymer is used as a lubricating coating for various surfaces in aqueous and non-aqueous environments. Polyethylene glycol has a low toxicity and is used in a variety of products.Because PEG is a hydrophilic molecule, it has been used to passivate microscope glass slides for avoiding non-specific sticking of proteins in single-molecule fluorescence studies.Terra cotta warrior, showing traces of original color As of 18 December, the US CDC stated that in their jurisdiction six cases of "severe allergic reaction" had been recorded from more than 250,000 vaccinations, and of those six only one person had a "history of vaccination reactions". were treated and have recovered" from anaphylactic shock. As of December 2020 there is some concern that PEG could trigger allergic reaction, and in fact allergic reactions are the driver for both the United Kingdom and Canadian regulators to issue an advisory, noting that: two "individuals in the U.K. In both vaccines, the bubbles are coated with a stabilizing molecule of polyethylene glycol. Proprietary lipid technology is used for each. Both RNA vaccines consist of messenger RNA, or mRNA, encased in a bubble of oily molecules called lipids. ![]()
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