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3 days ago · Antiaromatic nucleophilic substitution reactions in cycloheptatrienide pyridinium and phosphonium zwitterions with initial formation of a cycloheptatetraene intermediate are explored. The mechanism was supported by quantum chemical calculations, first-order reaction kinetics, and high-resolution mass spectrometry. The pyridinium zwitterion exhibited weak antiaromaticity, whereas the ...
4 days ago · The men's field hockey tournament at the 1996 Summer Olympics was the 18th edition of the field hockey event for men at the Summer Olympic Games. It was held over a fourteen-day period beginning on 20 July, and culminating with the medal finals on 2 August. Games were played at the Herndon Stadium and the Panther Stadium, both located in ...
2 days ago · Joy Williams Grudgingly Revises, Word by Word. But “I’m averse to entertaining the thought that what I’m working on is a first draft,” she says, “which implies the necessity of a second ...
Jun 13, 2024 · Director Yevgeniya Berkovich and writer Svetlana Petriychuk are standing trial at a military court over their 2021 play about Russian women lured to marry Islamic State militants in Syria.
4 days ago · Mikhail Tal vs. Yuri Balashov, 1973, 53 moves Heikki Westerinen vs. Mikhail Tal, 1973, 24 moves Igor Platonov vs. Mikhail Tal, 1971, 56 moves Leonid Stein vs. Mikhail Tal, 1971, 52 moves Arthur Bisguier vs. Mikhail Tal, 1971, 42 moves Bent Larsen vs, Mikhail Tal, 1969, 48 moves Mikhail Podgaets vs. Mikhail Tal, 1969, 74 moves
Jun 24, 2024 · Sergey Fyodorovich Platonov was a leading Russian historian of the early 20th century. Having graduated from the University of St. Petersburg in 1882, Platonov held various academic posts at that institution and elsewhere.
3 days ago · However, as reviewed by Platonov development of paroxysmal AF is not always accompanied by underlying structural heart disease. It was further indicated that the P wave morphology depends on the three basic factors, being the SAN location defining the RA excitation pattern, the active interatrial connections and breakthrough points in the LA, and the individual atrial shape, size and ...
