Thenard, Louis Jacques

Thenard, Louis Jacques (1777-1857) French chemist and professor at ficole Polytechnique in Paris he published a textbook, and his Traite de chimie elimentaire, theorique et pratique (4 vols., Paris, 1813-16), which served as a standard for a quarter of a century. 

Thenard, Louis Jacques. 1807a. Memoire sur les ethers. Memoires de Physique et de Chimie de la Socidtd d Arcueil 1 73-114. 

Joseph Louis Gay-Lussac (1778-1850) and Louis Jacques Thenard (1777-1857). 

Alexander von Humboldt (1769-1859) recognised meteorites as being a source of extraterrestrial material. Several well-known chemists carried out analyses of material from meteorites, starting at the beginning of the nineteenth century. Thus Louis-Jacques Thenard (1777-1857) found carbon in Alais meteorites these results were confirmed in 1834 by Jons Jacob Berzelius, who by dint of very careful work was also able to detect water of crystallisation in meteoritic material. 

Ecole Polytechnique, the Institute of Egypt, and the suburban Arcueil estates of Laplace and Berthollet. Like Gay-Lussac, the chemists Louis N. Vauquelin, Michel Eugene Chevreul, and Louis Jacques Thenard admitted well-recommended students to their private chemical laboratories. By the 1830s, Dumas and Victor Regnault were training students in larger numbers as part of the expected chemical curriculum. 84... 

Boron - the atomic number is 5 and the chemical symbol is B. The name derives from the Arabic buraq for white . Although its compounds were known for thousands of years, it was not isolated until 1808 when the French chemists Louis-Joseph Gay-Lussac and Louis-Jacques Thenard obtained boron in an impure state and the English chemist, Humphry Davy, prepared pure boron by electrolysis. 

In 1808 two French chemists, Joseph Louis Gay-Lussac (1778-1850) and Louis-Jacques Thenard (1777-1857), experimented along the same lines as Davy and should also be given some credit for the discovery of these elements. The Frenchmen named the new element bore, and Davy called it boracium. ... 

British chemist Sir Humphry Davy and French chemists Joseph-Louis Gay-Lussac, Louis-Jacques Thenard Nearly as hard as diamond, this brittle crystal is rare in pure form combines to form borax also valuable in the production of glass and semiconductors. 

Louis-Jacques Thenard, 1777-1857. Professor of chemistry at the Ecole Poly-technique. Discoverer of hydrogen peroxide. Collaborator with Gay-Lussac m his researches on potassium, boron, lodme, and chlorine. He also investigated many fatty acids, esters and ethers... 

With his colleague Louis-Jacques Thenard (1777-1857), Gay-Lussac did considerable work with electrochemistry to produce significant amounts of elemental sodium and potassium, highly reactive and useful substances that were used to isolate and discover the element boron. Gay-Lussac also completed extensive studies of acids and bases and was the first to deduce that there were binary (two element) acids such as hydrochloric acid (HC1) in addition to the known oxygen-containing acids like sulfuric acid (H2S04). Additionally, he was able to determine the chemical composition of prussic acid to be hydrocyanic acid (HCN) and was considered the foremost practitioner of organic analysis. 

The French chemist Louis Jacques Thenard first enunciated electrochemical nature of corrosion phenomenon explicitly in 1819. Some research activities that led to the firm electrochemical foundations of corrosion process are summarized below ... 

News of Davy s success had traveled to France, where emperor Napoleon Bonaparte (1769—1821) grew concerned about the scientific reputation of his country. He ordered larger and better equipment built for his scientists. He wanted them to surpass Davy in his work on metals. This equipment was designed especially for two French chemists, Louis Jacques Thenard (1777-1857) and Joseph Louis Gay-Lussac (1778-1850). 

French chemists Louis Jacques Thenard and Joseph Louis Gay-Lussac discover boron. Davy isolates the element a few days after its discovery has been announced. 

Boron occurs in nature as part of oxygenated compounds, or borates, that have been known since ancient times for their use in glass and metal production. In 1808 Joseph-Lotiis Gay-Lussac and Louis Jacques Thenard of France and Humphry Davy of England discovered the element boron almost concurrently. Another century passed before boron was successfully isolated in pure form. Elemental boron in its amorphous form is a dark brown powder it is a yellowish-brown, hard, brittle solid in its monoclinic crystalline form. It melts at 2,300°C (4,172°E). Boron is unreactive to oxygen, water, acids, and alkalis. Boron compotmds burn yellow-green during the flame test. 

One of the fathers of chemical kinetics, Louis Jacques Thenard, discovered hydrogen peroxide and measured its decomposition rates. He demonstrated for the first time, that rates of chemical reactions varied with the concentrations of the reactants. In later study Ludwig Ferdinand Wilhelmy investigated the inversion of cane sugar in the presence of acids and... 

Hydrogen peroxide was discovered in 1818 by French chemist Louis Jacques Thenard (1777-1857). It was first used commercially in the 1800s, primarily to bleach hats. Today, industrial processes make about 500 million kilograms (1 billion pounds) of hydrogen peroxide annually for use in a wide variety of applications ranging from whitening of teeth to propelling rockets. 

Hydrogen peroxide is discovered by French chemist Louis Jacques Thenard. 

All these industrial innovations would have their own impact on other developments in industrial and then medicinal chemistry. At the beginning of the nineteenth century, as the result of a scientific approach, drugs were becoming an industrial item. Claude Louis Berthollet (1748-1822) begins the industrial exploitation of chlorine (circa 1785). Nicolas Leblanc (1742-1806) prepared sodium hydroxide (circa 1789) and then bleach (circa 1796). Davy performed electrolysis and distinguished between acids and anhydrides. Louis Jacques Thenard (1777-1857) prepared hydrogen peroxide and Antoine Jerome Balard (1802-1876) discovered bromide (1826). 

Von Liebig came to Paris to study with Louis-Jacques Thenard (1777-1857), Gay-Lussac, Michel-Eugene Chevreul (1783-1886) and Nicolas Vauquelin (1763-1829). Returning to the University of Giessen, in Germany, he became a university professor at the age of 21, something quite unique in history. 

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