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Air changes per hour is a measurement intended to communicate the air change effectiveness of a space’s ventilation system. Discussion around the ASHRAE standard 62, Ventilation for Acceptable Indoor Air Quality led to the development of a more direct method of measuring air change effectiveness with the use of a tracer gas. [ 1 ]
A turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft propulsion.The word "turbofan" is a combination of references to the preceding generation engine technology of the turbojet and the additional fan stage.
Although the F-4 was subject to irrecoverable spins during aileron rolls, pilots reported the aircraft to be very responsive and easy to fly on the edge of its performance envelope. In 1972, the F-4E model was upgraded with leading edge slats on the wing, greatly improving high angle of attack maneuverability at the expense of top speed. [62]
Microsoft Word is a word processing program developed by Microsoft.It was first released on October 25, 1983, [13] under the name Multi-Tool Word for Xenix systems. [14] [15] [16] Subsequent versions were later written for several other platforms including: IBM PCs running DOS (1983), Apple Macintosh running the Classic Mac OS (1985), AT&T UNIX PC (1985), Atari ST (1988), OS/2 (1989 ...
In 2015, Jordan donated a settlement of undisclosed size from a lawsuit against supermarkets that had used his name without permission to 23 different Chicago charities. [379] In 2017, Jordan funded two Novant Health Michael Jordan Family Clinics in Charlotte, North Carolina , by giving $7 million, the biggest donation he had made at the time ...
Sizes range from just 62 amino acid residues, for the monomer of 4-oxalocrotonate tautomerase, [28] to over 2,500 residues in the animal fatty acid synthase. [29] Only a small portion of their structure (around 2–4 amino acids) is directly involved in catalysis: the catalytic site. [ 30 ]