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Eugène Millon
Eugène Auguste Nicolas Millon (24 April 1812 – 22 October 1867) was a French chemist and physician. He is remembered in the name of Millon's reagent which reacts with tyrosine in proteins to form a brown precipitate. The reagent is used for determination of the presence of soluble proteins. Millon was born in Saint-Seine-l'Abbaye Saint-Seine-l'Abbaye () is a commune in the Côte-d'Or department in eastern France. It is also a place steeped in history with its archaeological sites, the goddess Sequana; nymph Sources close to the Seine and Alesia, the remnants of its ancien ... and after his education, he taught briefly at the Collège Rollin after before training in medicine at the military hospital at Val-de-Grâce from 1832 to 1835. After serving for a while in the army he left surgery to study pharmacy and chemistry and became a pharmacist in 1838, serving from 1850 to 1865 in Algeria. His most well-known contribution was the reaction of mercury and nitric acid with egg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E Millon
E, or e, is the fifth letter and the second vowel letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''e'' (pronounced ); plural ''ees'', ''Es'' or ''E's''. It is the most commonly used letter in many languages, including Czech, Danish, Dutch, English, French, German, Hungarian, Latin, Latvian, Norwegian, Spanish, and Swedish. History The Latin letter 'E' differs little from its source, the Greek letter epsilon, 'Ε'. This in turn comes from the Semitic letter '' hê'', which has been suggested to have started as a praying or calling human figure ('' hillul'' 'jubilation'), and was most likely based on a similar Egyptian hieroglyph that indicated a different pronunciation. In Semitic, the letter represented (and in foreign words); in Greek, ''hê'' became the letter epsilon, used to represent . The various forms of the Old Italic script and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millon's Reagent
Millon's reagent is an analytical reagent used to detect the presence of soluble proteins. A few drops of the reagent are added to the test solution, which is then heated gently. A reddish-brown coloration or precipitate indicates the presence of tyrosine residue which occur in nearly all proteins. The test was developed by the French chemist Auguste Nicolas Eugene Millon. The reagent is made by dissolving metallic mercury in nitric acid and diluting with water, forming mercuric nitrate (Hg O3sub>2). In the test, the phenol group in the side chain of tyrosine gets nitrated, and that product then complexes with Hg(I) or Hg(II) ions to give a red colored precipitate. Millon's test is not specific for proteins; it also gives a positive test for other compounds containing the phenol functional group. Therefore, the biuret test or the ninhydrin reaction are used along with it to confirm the presence of proteins. See also *Benedict's reagent Benedict's reagent (often called Bened ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tyrosine
-Tyrosine or tyrosine (symbol Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins. It is a non-essential amino acid with a polar side group. The word "tyrosine" is from the Greek ''tyrós'', meaning ''cheese'', as it was first discovered in 1846 by German chemist Justus von Liebig in the protein casein from cheese. It is called tyrosyl when referred to as a functional group or side chain. While tyrosine is generally classified as a Hydrophobe, hydrophobic amino acid, it is more hydrophilic than phenylalanine. It is Genetic code, encoded by the Genetic code#Codons, codons UAC and UAU in messenger RNA. Functions Aside from being a proteinogenic amino acid, tyrosine has a special role by virtue of the phenol functionality. It occurs in proteins that are part of signal transduction processes and functions as a receiver of phosphate groups that are transferred by way of protein kinases. Phosphorylation of the hyd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint-Seine-l'Abbaye
Saint-Seine-l'Abbaye () is a commune in the Côte-d'Or department in eastern France. It is also a place steeped in history with its archaeological sites, the goddess Sequana; nymph Sources close to the Seine and Alesia, the remnants of its ancient abbey (the Abbey of Saint-Seine) and the abbey church, a jewel of Gothic art primitive Burgundy and its rich rural heritage: the 1856 school converted into a museum, flower laundries, foundries, crucifixes, mills. The abbey was founded by Saint Sequanus in the 6th century. Population See also *Communes of the Côte-d'Or department The following is a list of the 698 Communes of France, communes of the Côte-d'Or Departments of France, department of France. The communes cooperate in the following Communes of France#Intercommunality, intercommunalities (as of 2020): References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collège-lycée Jacques-Decour
The Collège-lycée Jacques-Decour is a school in Paris, France, on avenue Trudaine. History The school was founded as the private Collège Sainte-Barbe in 1821 and renamed Collège Rollin in 1830. It was transplanted in 1876 from the Quartier Latin to avenue Trudaine, near Montmartre. The old building on rue Lhomond became the site of the Protestant Faculty of Theology in Paris in 1877. Collège Rollin was granted municipal status, and became Lycée Rollin in 1919. It is the only secondary school in Paris to have taken the name of a former teacher, Jacques Decour, a French Resistance fighter in 1944. Selected alumni * Charles Forbes René de Montalembert * Lucien Lévy * Édouard Manet * Félix Ravaisson * Georges Sorel Georges Eugène Sorel (; ; 2 November 1847 – 29 August 1922) was a French social thinker, political theorist, historian, and later journalist. He has inspired theories and movements grouped under the name of Sorelianism. His social and ... Referen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1812 Births
Year 181 ( CLXXXI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Aurelius and Burrus (or, less frequently, year 934 ''Ab urbe condita''). The denomination 181 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Imperator Lucius Aurelius Commodus and Lucius Antistius Burrus become Roman Consuls. * The Antonine Wall is overrun by the Picts in Britannia (approximate date). Oceania * The volcano associated with Lake Taupō in New Zealand erupts, one of the largest on Earth in the last 5,000 years. The effects of this eruption are seen as far away as Rome and China. Births * April 2 – Xian of Han, Chinese emperor (d. 234) * Zhuge Liang, Chinese chancellor and regent (d. 234) Deaths * Aelius Aristides, Greek orator and w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1867 Deaths
Events January–March * January 1 – The John A. Roebling Suspension Bridge, Covington–Cincinnati Suspension Bridge opens between Cincinnati, Ohio, and Covington, Kentucky, in the United States, becoming the longest single-span bridge in the world. It was renamed after its designer, John A. Roebling, in 1983. * January 8 – African-American men are granted the right to vote in the District of Columbia. * January 11 – Benito Juárez becomes Mexican president again. * January 30 – Emperor Kōmei of Japan dies suddenly, age 36, leaving his 14-year-old son to succeed as Emperor Meiji. * January 31 – Maronite nationalist leader Youssef Bey Karam leaves Lebanon aboard a French ship for Algeria. * February 3 – ''Shōgun'' Tokugawa Yoshinobu abdicates, and the late Emperor Kōmei's son, Prince Mutsuhito, becomes Emperor Meiji of Japan in a brief ceremony in Kyoto, ending the Late Tokugawa shogunate. * February 7 – West Virginia University is established in Morgan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
19th-century French Chemists
The 19th (nineteenth) century began on 1 January 1801 ( MDCCCI), and ended on 31 December 1900 ( MCM). The 19th century was the ninth century of the 2nd millennium. The 19th century was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanding beyond its British homeland for the first time during this century, particularly remaking the economies and societies of the Low Countries, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Islamic gunpowder empires fell into decline and European imperialism brought much of South Asia, Southeast Asia, and almost all of Africa under colonial rule. It was also marked by the collapse of the large S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
