Percy Lavon Julian (April 11, 1899 – April 19, 1975) was an American research chemist and a pioneer in the chemical synthesis of medicinal drugs from plants. He was the first to synthesize the natural product physostigmine and was a pioneer in the industrial large-scale chemical synthesis of the human hormones progesterone and testosterone from plant sterols such as …

The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on 1 January 45 BC, by edict.It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandria.. The calendar became the predominant calendar in the Roman Empire and subsequently most of the Western world for …

Old Style (O.S.) and New Style (N.S.) indicate dating systems before and after a calendar change, respectively.Usually, this is the change from the Julian calendar to the Gregorian calendar as enacted in various European countries between 1582 and 1923.. In England, Wales, Ireland and Britain's American colonies, there were two calendar changes, both in 1752.

The Revised Julian calendar, or less formally the new calendar, is a calendar proposed in 1923 by the Serbian scientist Milutin Milanković as a more accurate alternative to both Julian and Gregorian calendars. At the time, the Julian calendar was still in use by all of the Eastern Orthodox Churches and affiliated nations, while the Catholic and Protestant nations were using …

Early life. Julian, whose full name was Flavius Claudius Julianus, was born at Constantinople, probably in 331, into the family of the reigning emperor, Constantine I. His father was Julius Constantius, Constantine's younger half-brother, and his mother was a Bithynian noble named Basilina, daughter of a high-ranking bureaucrat, Julianus, who had served as praetorian prefect …

Here's Julian Treasure to help. In this useful talk, the sound expert demonstrates the how-to's of powerful speaking -- from some handy vocal exercises to tips on how to speak with empathy. A talk that might help the world sound more beautiful. This talk was presented at an official TED conference. TED's editors chose to feature it for you.

Nov 18, 2022 · Here are the Free Comic Book Day 2023 comic books. By George Marston published 15 November 22. news All the titles for FCBD 2023 - Gold and Silver - revealed news.

With only a few weeks until signing day, we break down who each Top 25 class already has who can be a college football star. 12d Tom VanHaaren. AP Photo/Ashley Landis.

Oct 11, 2022 · WikiLeaks founder Julian Assange has tested positive for COVID-19, his wife Stella Assange confirmed on Monday, adding that she is concerned for his health. “Julian was feeling unwell last week ...

Venerable Therapon, Abbot of Monza. Saint Therapon of Monza was a monk in the monastery of Saint Adrian (May 5) at the River Monza. The monk began his ascetic deeds in Moscow, and then transferred to the city of Kostroma at the Elevation of the …