موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ٣_د

Encyclopedia of Scientists and Inventors.. Scientists in order according to their nickname.. Letter 3_d

⏹Dutani, Giovanni Bansta
Dotani, Giovanni Battista

Italian astronomer (1826-1873)
Duttani was educated in Pisa, and made his name through his research on stellar spectra. For the sake of this study, he set up a spectroscope containing twenty-five glass prisms. Dotani was the first to observe the spectrum of a comet.
Dotani discovered one of the comets in 1858, and this comet became known as Dotani. He also discovered five other comets. Dutani was responsible for the establishment of the Florence Observatory and served as its director.
It is noteworthy that Dotani died of hay fever (yellow air or cholera).

⏹ Dunant, Frederick George
Friedrick George, Donnan

Irish chemist (1870 - 1956)
Donan studied in Belfast, Leipzig, Berlin and London, then worked as a professor of physical chemistry in Liverpool and then in London, where he taught chemistry at University College. Donan was chosen as a fellow at the Royal Society for his studies on chemical kinetics.
And he put forward a theory called “Donnan’s theory” about the balance of membranes (the balance of ions on both sides of the membrane), which is of great importance in the study of proteins (albuminae) and some colloids in biochemistry.

⏹ Donner, Nils Christopher
Duner, Nils Christopher

Swedish astronomer (1839 - 1914)
Donner learned in Lund, where he started with geography, then turned to astronomy, so he worked as a professor of this subject at Uppsala University, and he also worked as director of the observatory there. Donner was an expert in the study of stellar spectrums, and with his spectral studies he showed that different regions of the sun have different speeds of rotation. Donner's studies included stars whose light fades and brightens at certain variable periods.
Variable stars are also known as double stars, and it is the case in which two stars appear as if they were attached to one line of sight, but the telescopic examination shows that they are separated.

⏹ Doisy, Edward Adelbert
Doisy, Edward Adelbert

American biochemist (1893-)
Doisy was educated at Illinois, Harvard, and Washington · He held several academic positions at American universities, then became Director of the Department of Biochemistry at St. Mary's Hospital. Mary » in St. Louis, the most prominent and important of Doisy's research was on sex hormones and vitamins, so he was able to isolate thylenine in 1929 and vitamin K in 1933.
He shared with Dam the Nobel Prize in Chemistry in 1943.

⏹ de Broglie, Louis Victor
de Broglie Louis Victor

French physicist (1892 - ) ·
De Broglie was educated in Paris, and became a professor of physics there in 1932. He is best known for his research in nuclear physics, in which he linked the theory
Wave and Corpuscular theory and for the first time won the Nobel Prize for Physics in 1929.
He is the brother of the physicist Maurice Maurice.

⏹ de Broglie Maurice
Maurice, Duc de Broglie,

French physicist (1875 - 1960)
De Broglie learned at Ecole Naval, then worked as an officer in the Navy, then worked as a professor of physics, and was a foreign member of the British Royal Society. De Broglie was famous for his nuclear physics and X-ray research, and he is the brother of Louis Victor de Broglie.

⏹ Debo, Rene Gilles
Dubos, Rene Jules

French-American bacteriologist (1901) ·
Debo learned and trained in Paris, then traveled to America and was naturalized at the age of thirty-seven with American citizenship. Debo joined the “Rockefeller Institute for Medical Research” (R.I.M.R), of which he later became a member. Debo’s good reputation was based on his medical research and his discovery of “tyrothricin” and the author From several materials of antibiotics, he isolated it from a type of living cell called «Bacillus brevis, which has semi-organic cells inside and spread in the soil.

⏹ Ditrochieh, Rene Joachim Henry
René Joachim Henri Dutrochet,

French physiologist
( 1776 - 1847 )
Detruchet trained as a physician in Paris
He worked as a doctor for Joseph Bonaparte.
Dietroux was the first to study osmosis (diffusion of solutions through membranes). It was he who named it Osmosis, as it was mentioned in his book, New Researches on Internal Osmosis and External Osmosis, Nouvelles Recherches sur L'endosmose et L'exosmose. (1828).

⏹ Ditton, Humphrey

English mathematician (1675 - 1715) ·
Deaton worked as a mathematics teacher at the Christ Hospital affiliated school, so he wrote a number of references in mathematics
Deaton was the first to try to explain the poetic property mathematically. Deaton invented a method for determining longitude.