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Nomex Type 410 paper was the first Nomex paper developed and one of the higher volume grades made, mostly for electrical insulation purposes. Wilfred Sweeny (1926–2011), the DuPont scientist responsible for discoveries leading to Nomex, earned a DuPont Lavoisier Medal [ 4 ] in 2002 partly for this work.
1946: Ejection seat – first live test of a reliable, successful modern ejection seat invented by James Martin. [54] 1947: Duty-free shopping invented by Brendan O'Regan. [55] 1950: Flavoured potato crisps invented by Joseph Murphy. [56] 1954: Clofazimine discovered by a medical research team led by Vincent Barry.
The pH value of paper indicates the residual acidic/alkaline chemicals in pulp, or atmospheric pollutants. It is an environmental KPI parameter in paper making. Acidic paper made from wood-based pulp that still contains lignin will deteriorate over time by becoming brittle and turning yellow. [1]
It is widely used to measure minimum, maximum (or first bubble point) and mean flow pore sizes, and pore size distribution in membranes [1] nonwovens, paper, filtration and ultrafiltration media, hollow fibers, [2] ceramics, etc. In capillary flow porometry an inert gas is used to displace a liquid, which is in the pores. The pressure required ...
An Orsat gas analyser or Orsat apparatus is a piece of laboratory equipment used to analyse a gas sample (typically fossil fuel flue gas) for its oxygen, carbon monoxide and carbon dioxide content. Although largely replaced by instrumental techniques, the Orsat remains a reliable method of measurement and is relatively simple to use. [1]
The test is conducted in an Erlenmeyer flask, or in a separatory funnel. It involves the combustion of a sample in pure oxygen, followed by the absorption of the combustion products by a solution of sodium hydroxide. [2] It allows quantitative determination of elemental chlorine, nitrogen and sulfur in a sample.
Pay-Pay rolling papers company was formed in Spain in 1703. This official website states the first papers were produced in 1764. It is the oldest rolling paper manufacturer still in operation. [1] PAY-PAY is produced in Alcoy, Spain. The paper is made with ecological gum arabic. RAW: United States: Owned by BBK Tobacco & Foods, LLP (HBI ...
SolidOx was the brand name for welding equipment produced by Cleanweld Products for do-it-yourself [1] [2] welding enthusiasts from 1965 until at least the early 1980s; the SOLIDOX name was registered as a trademark in 1968.
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