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Scratches may easily be removed by polishing or by heating the surface of the material. Laser cutting may be used to form intricate designs from PMMA sheets. PMMA vaporizes to gaseous compounds (including its monomers) upon laser cutting, so a very clean cut is made, and cutting is performed very easily.
It has better thermal stability, higher resistance to crazing when exposed to solvents, wider thermoforming range than extruded acrylic. Cast acrylic has a better ability to be reworked hot and it is known for its superior surface finish and optical properties. Also cast acrylic is more scratch resistant than extruded acrylic.
Examples of hidden bias include a 2014 study from McGill University in Montreal, Canada, which suggests that mice handled by men rather than women showed higher stress levels. [7] [36] [37] Another study in 2016 suggested that gut microbiomes in mice may have an impact upon scientific research. [38]
Since phones are commonly carried in a pocket or purse with items such as keys, scratch resistance is important. There also exists a more advanced two-stage process for making chemically strengthened glass, in which the glass article is first immersed in a sodium nitrate bath at 450 °C (842 °F), which enriches the surface with sodium ions.
House mice, like most other rodents, do not vomit. [25] Mice are generally afraid of rats which often kill and eat them, a behavior known as muricide. Despite this, free-living populations of rats and mice do exist together in forest areas in New Zealand, North America, and elsewhere.
A 98% biodegradable or other, [2] slightly moist absorbent cleaning compound may be spread evenly over carpet and brushed or scrubbed in. For small areas, a household hand brush can work such a compound into carpet pile; working like "tiny sponges", the attracted cleaning solution dissolves dirt, and dirt and grime is attracted/absorbed to the compound.
When Vice President Mike Pence and Sen. Kamala Harris square off on the debate stage Wednesday night, a pair of plexiglass barriers will separate them. The barriers are just one of the coronavirus ...
Similar to other rodenticides, the preparation requires 3–7 days to be effective. Rather than killing rodents through internal haemorrhaging as anticoagulants do, [9] PCC affects a rodent’s digestive system, causing acute dehydration due to its extremely absorptive nature (corn cob has been used in applications such as oil spills in water bodies, seed drying and de-icing). [10]