September 9

This day in history:

• 1839 – John Herschel takes the first glass plate photograph.
• 1947 – First case of a computer bug being found: A moth lodges in a relay of a Harvard Mark II computer at Harvard University.
• 2001 – Ahmad Shah Massoud, leader of the Northern Alliance, is assassinated in Afghanistan by two al-Qaeda assassins who claimed to be Arab journalists wanting an interview.
• 1488 – Anne becomes sovereign Duchess of Brittany, becoming a central figure in the struggle for influence that leads to the union of Brittany and France.

Births:

• 1924 – Jane Greer, American actress (d. 2001)
• 1923 – Cliff Robertson, American actor (d. 2011)
• 1942 – Danny Kalb, American singer and guitarist (d. 2022)

Deaths:

• 1963 – Edwin Linkomies, Finnish academic, professor and the Prime Minister of Finland (b. 1894)
• 1915 – Albert Spalding, American baseball player, manager, and businessman, co-founded Spalding (b. 1850)
• 1998 – Bill Cratty, American dancer and choreographer (b. 1951)

Holidays:

• Independence Day or Republic Day, celebrates the proclamation of Democratic People's Republic of Korea (North Korea) in 1948.
• * (Japan)*
• Independence Day (Tajikistan), celebrates the independence of Tajikistan from USSR in 1991.

Random Article of the day:

N-acetylhexosamine 1-dehydrogenase

In enzymology, a N-acetylhexosamine 1-dehydrogenase (EC 1.1.1.240) is an enzyme that catalyzes the chemical reaction

N-acetyl-D-glucosamine + NAD+

⇌

{\displaystyle \rightleftharpoons }

N-acetyl-D-glucosaminate + NADH + H+
Thus, the two substrates of this enzyme are N-acetyl-D-glucosamine and NAD+, whereas its 3 products are N-acetyl-D-glucosaminate, NADH, and H+.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is N-acetyl-D-hexosamine:NAD+ 1-oxidoreductase. Other names in common use include N-acetylhexosamine dehydrogenase, and N-acetyl-D-hexosamine dehydrogenase.