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Hace 5 días · Jöns Jacob Berzelius (1749-1848) was a famous chemist and one of the founders of the Karolinska Institutet. This meeting is sponsored by Acta Paediatrica and the Journal of Internal Medicine. Some of the speakers will be invited to write review articles based on their lectures.
Hace 4 días · Now, his own fierce autobiography has re-emerged. “The United States Governed by Six Hundred Thousand Despots,” a denunciation of slavery by a formerly enslaved man named John S. Jacobs, was ...
Hace 5 días · 01 Selenium was discovered in 1817 by Swedish chemist Jöns Jacob Berzelius. 02 This element is named after Selene, the Greek goddess of the moon, reflecting its moon-like glow when first discovered. Selenium's Role in Health. Selenium is essential for human health.
Hace 2 días · His plan was too ambitious, however, and nothing further appeared. Its completion, according to Swedish chemist Jöns Jacob Berzelius, would have “advanced the science of chemistry a full century.”
Hace 5 días · No final do século XVIII e início do século XIX acreditava-se na teoria da força vital formulada por Jöns Jacob Berzelius, que dizia que os compostos orgânicos só poderiam ser produzidos por organismos vivos (animais e vegetais). Após diversas tentativas, em 1828, Friedrich Wöhler conseguiu obter a ureia, substância encontrada na urina e no sangue.
Hace 5 días · Jacob Berzelius (1779-1848) observed and isolated silicon in 1823. Humphry Davy named silicon in 1800 when he thought it was a compound. Berzelius was the first to isolate pure silicon. Silicon has the atomic number 14 and the chemical symbol Si. Silicon has a melting point of 3265 degrees Fahrenheit.
Hace 3 días · Babilonia, una gran potencia matemática. Los babilonios siempre han sido una de las civilizaciones históricas más investigadas durante muchos años y se conoce que en Babilonia amplios conocimientos de matemáticas, algo que muchas otras civilizaciones contemporáneas a ellos no utilizaban. Como todos sabemos, la escritura está basada ...
