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The yellow (red-green) lighting is necessary for photolithography, to prevent unwanted exposure of photoresist to light of shorter wavelengths. A cleanroom or clean room is an engineered space that maintains a very low concentration of airborne particulates. It is well isolated, well controlled from contamination, and actively cleansed.
Members of the Committee on Financial Services sit in the tiers of raised chairs (R), while those testifying and audience members sit below (L). There are two main types of congressional committees in the United States House of Representatives, standing committees and select committees. Committee chairs are selected by whichever party is in the ...
A hood chair or porter's chair was a type of chair used originally in medieval England and later France. Usually made of wood, but sometimes formed in a high-grade leather or red velvet, it was placed by the front door of an estate or home for use by a gatekeeper servant who was in charge of screening guests and visitors. This was necessary ...
A swivel chair with a pump to raise and lower the seat. A swivel, swivelling, spinny, or revolving chair is a chair with a single central leg that allows the seat to rotate 360 degrees to the left or right. A concept of a rotating chair with swivel castors was illustrated by the Nuremberg noble Martin Löffelholz von Kolberg in his 1505 ...
Chemical structure of the vinyl functional group. In organic chemistry, a vinyl group (abbr. Vi; [1] IUPAC name: ethenyl group [2]) is a functional group with the formula −CH=CH2. It is the ethylene (IUPAC name: ethene) molecule ( H2C=CH2) with one fewer hydrogen atom. The name is also used for any compound containing that group, namely R− ...
The solution looks promising. Bill Gates wants to 'fix the cows' so they stop burping, farting methane into the air — here's the startup he backed to help fight climate change.
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