موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ١_د

Encyclopedia of Scientists and Inventors.. Scientists in order according to their nickname.. The letter 1_D

Dam, Carl Peter Henrik
Dam, Carl Peter Henrik

Danish biochemist (1895)
Dam received his education in Copenhagen, then worked as a teacher there, and after that he immigrated to America, and became a member of the “Rockville Institute for Medical Research.” He has very prominent works on the topic of vitamins. Year 1934.

⏹ Dyson, Sir Frank Watson
Dyson, Sir Frank Watson

English astronomer (1868 - 1939)
Assistants at the “Greenwich Observatory” and an astronomer, then he returned to England, royally, to Scotland to occupy a similar position in “Greenwich.” Dyson was chosen as a Fellow of the Royal Society, and his most important work focused on the distribution and movement of stars and the structure of the universe.
Dyson introduced the system of broadcasting time signals in the British Broadcasting House for the first time. · He also dedicated the use of six audio signals (beep) in the aforementioned radio station, as well as devoted scrutiny in observing the time signals. He entered the observatory to study the apparent positional changes (aberration) in the positions of the stars.

⏹ Peter Joseph Wilhelm
Debye Peter Joseph Wilhelm

Dutch-American physicist (1966-1884)
Dabier learned in Munich, then worked as a teacher there. He also taught as a professor in Zurich, Utrecht, Gittingen, and Leipzig, then he was appointed to the Kaiser Wilhelm Institute for Physics in Berlin in 1935.
Debier won the Nobel Prize for Physics in 1936, then went to America and worked as a teacher there in 1940 and at Cornell University for his important studies on polarized molecules, magnetic moments and molecular structure. He was a pioneer in the field of X-ray imaging of fine (pulverized) samples and worked in collaboration with Hickel
in salinity problems.

Dorode, Paul Karl Ludwig
Drude, Paul Karl Ludwig

German physicist (1863 - 1906)
Durode studied in Gettingen, Freiberg, and Berlin, then taught physics in Leipzig, Giessen, and finally in Berlin. Durode's research became famous as a result of his application of Maxwell's electromagnetic theory to light problems. His research on refraction is also famous. Duruda measured the refractive index of metallic sodium and reached a value of 0.12 (twelve percent), which is the lowest known refractive index. Duruda suffered from inappropriate conditions, so he committed suicide, and with that, physics lost a prominent scientist and researcher.

Draper, John William
Draper, John William

American chemist (1811-1882)
Draper studied in London and received further education at the University of Pennsylvania. He worked as a professor of chemistry at New York University and later taught medicine. Draper is famous for his research in photochemistry and was the first to make a picture of a human using light.
Then the method followed by Draper was improved at the hands of the French inventor Daquerre.

Draper, Henry

American scientist (1837-1882) ·
Draper was educated in New York, then worked as a professor of natural sciences and taught chemistry for a short period. Draper's research in the spectrum became famous, as he designed a controllable metal mesh • Draper was able to prove the existence of oxygen in the sun itself, and Draper's photograph of the spectrum types remains a reminder of his important achievements. It is noteworthy that this Henry Draper is the son of the American scientist John William Draper J. W. Draper.

Darish, Hans Adolf Edward
Driesch, Hans Adolf Edward

German biologist (1867 - 1941)
Drish received his education in Hamburg, Freiburg, Munich, and Jena, then worked as a professor of philosophy in Heidelberg, then moved to Cologne and Leipzig. complete. After that, he obtained fully formed embryos from them, but they were small in size compared to the egg embryos. This study and other similar important cross-section studies led to the emergence of the theory
The new biological mechanism (mechanism) of evolution. One of Drish's most prominent achievements is a valuable book entitled: An Analytical Theory of Organic Evolution.
Analytische Theorie der Organischen Entwicklung

Dixon, Harold Bailey
Dixon, Harold Bailey

English chemist (1852-1930) ·
Dixon was educated at Westminster School, and obtained a scholarship to enter Christchurch, at Oxford, where he studied science and some arts. Then he went to Manchester to work as a lecturer there. Dixon made important studies on the explosion of gases. These studies were of particular importance for the mining industry (mining).

Dixon became a world reference on the subject of combustion and conducted research on water. He had many chemical discoveries, and he discovered, for example, that a mixture of oxygen, hydrogen, and carbon monoxide cannot explode by electric spark if it is dry.