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The plastic kits and covers are mostly made of synthetic polymers like polythene, and tires are manufactured from polybutadienes. [1] However, due to the environmental issues created by these synthetic polymers which are mostly non-biodegradable and often synthesized from petroleum, alternatives like bioplastics are also being considered.
The use of cotton swabs in the ear canal is one of the most common causes of perforated eardrum, a condition which sometimes requires surgery to correct. [18] A 2004 study found that the "use of a cotton-tip applicator to clean the ear seems to be the leading cause of otitis externa in children and should be avoided."
[8] [9] The item is also generically called cell culture bottle [4] or tissue culture (TC) bottle, [8] and flask may be used instead of "bottle". [3] Pile of Roux bottles with culture medium. A Roux bottle provides a large surface for the cells or microorganisms to grow, whether on the top of, [10] floating in, [11] or at the bottom of the ...
Some types of vacuum-insulated flasks use an inner layer of glass (which is easy to clean), and an outer layer of metal or plastic which helps shield the glass from breakage. Such bottles may still break if dropped, and thus some brands are triple-layer, with the glass inside two layers of plastic; this is a common configuration for large ...
The cotton balls bring moisture into the bottle, which can damage the pills, so the National Library of Medicine actually recommends you take the cotton ball out. Related: Foods doctors won't eat ...
A film applicator is a device used to evenly spread a substance, such as paint, ink, or cosmetics, over a substrate such as a drawdown card. Applicators are usually metal bars that are manufactured to high tolerances to give consistent, repeatable results.
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