موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ٦_غ

Encyclopedia of Scientists and Inventors.. Scientists in order according to their nickname.. The letter 6_g

⏹ Gomberg, Moses Gomberg, Moses

Ukrainian-born American chemist (1866-1947)
Gomberg traveled to America in his youth, studied in Michigan, then returned to complete his studies in Munich and Heidelberg, then returned to Michigan to work in teaching chemistry. Gomberg discovered trivalent carbon (coal), and he won several titles of honor in chemistry.
Gomberg conducted comprehensive research on the compound “triphenylmethyl” and its derivatives. He also studied cracks (free radicals and kinetic structural symmetry (tautomarism) in organic chemical compounds.

⏹ Guitar, Jean Etienne
Etienne Jean Guettard,

French geologist (1715 - 1786).
Guitar began studying medicine in Paris. Then he worked as a curator (guardian) of the collections of the Duke of Orleans related to natural history.
He collected his important observations about weathering (untiling and dissolving rocks and soil) by winds, rains, and weather factors. The height of the land (land) and the surface of the sea floor has been attributed to compensation (for the lost weight) as a result of erosion, and this is called isostasy. Guitar put the first geological map.

⏹ Gerard, Albert Girard,

Dutch mathematician (1595 - 1632)
Gerrard's fame is due to his publication of a book on trigonometry in which he used the trigonometry (abbreviations) s (sin), (tan) and (sec) (instead of the full words corresponding to sine, tangent, and secant), and that was for the first time in the history of trigonometry. Then, three years later, in 1629, he published a book on algebra that included the first use of parentheses, and it also stated that the number of roots in an algebraic equation is equal to the degree of that equation, and he also used imaginary roots.

⏹ Gerhard Charles Frederick
Gerhard Charles Frederic

French chemist (1816-1856)
Gerhard learned in the universities of his first home, in Giessen, he was apprenticed by Liebeg, then he worked as an assistant to the scientist Dumas in Paris, and he worked as a professor of chemistry in Montpellier and Strasbourg, then he returned to Paris to join Laurent, who was comparable to him in several matters, in a private chemical laboratory. Gerhard did basic research in organic chemistry. His outspoken criticism has led. To his colleagues, he lost a lot of his popularity. He was described as roughness and dullness.
His theories about symmetrical chains and chemical types were severely opposed because they were contrary to the norm at that time. His theories were proven correct one year before his death.
His son Charles wrote about him under the title Life of Charles Gerhardt.

⏹ Geisel, Friedrich Giesel,

German chemist ( 1852 - 1927 )
Geisel worked as an industrial chemist in one of the factories producing quinine, which is used to treat malaria, common cold and influenza.
Geisel managed to prepare large quantities of radioactive minerals. In 1904 Geisel discovered the element "amanium" (actinium - S), which is radioactive and closely related to actinium (Ac).

⏹ Gessner, Konrad von
Gesner, Konrad Von

German botanist and animal scientist
( 1565 - 1516 )
Gesner received his education in Strasbourg, Bourges, and Paris, then worked as a school director in Zurich, after that he studied medicine in Basel (Basel), and rose to a professor of Greek in Lausanne, then philosophy in Zurich. His book - Historia Animalium from the year (1550-1587) is considered the scientific basis for the study of zoology.
Gessner made valuable studies on plants as well, and was famous for being one of the first - if not the first at all - mountain climbers. He wrote a unique description of Mount Pilatus, or Mount Lucerne, and Gessner died of the plague.

⏹ Gegenbauer, Carl

German anatomist (1826-1903)
Gegenbauer received his education in Fritzburg and then worked as a professor of anatomy in Pena and then in Heidelberg. His studies emphasized the importance of comparative anatomy • Gegenbauer's research on fish strongly supported Huxley's position in his refuting of the theory that the origin of the skull is an enlarged vertebra. He was one of the strongest defenders of the theory of evolution in the European continent at that time, and through his studies of embryos, Gegenbauer concluded in 1861 that eggs are nothing but simple cells • The physiologist Schwann had referred to this in 1838, and considered that a decisive scientific event.