موسوعة العلمـاء و المخترعين .. العلمـاء بالترتيب حسب اسم الشهرة .. الحرف ٢_غ

Encyclopedia of Scientists and Inventors.. Scientists in order according to their nickname.. The letter 2_g

⏹ Geitel, Hans Friedrich
Geitel, Hans Friedrich

German physicist (1923 - 1855)
Gaitel worked as a professor of physics at the Brunswick Technical Institute.. He participated with the scientist “Elster” in inventing the first practical photovoltaic cell and a device for measuring the intensity of light, as well as the “Tesla” transformer.
They also worked together in the study of electrical conduction and ionization of gases.
Gatel wrote a number of books (see Alastair).

⏹ Gibbs Josiah Willard
Gibbs, Josiah Willard

American mathematical physicist (1839 - 1903)
Gibbs taught at Yale, Paris, Berlin and Heidelberg, then worked as a professor of physical mathematics at Bell.
Chemistry Gibbs is considered one of the founders of physics (natural chemistry), and he had advanced mathematical studies, especially with regard to outcome analysis. Among the most important books of Gibbs is a book entitled:
On the balance of heterogeneous substances
On the Equilibrium of Heterogenous Substances.

He is also famous for his research on the phase rule, which is extremely important in the study of heterogeneous equilibriums, and is expressed by the sign:
i + p = c + 2, where i = p phases, p = number of degrees of freedom, c =
The number of components involved (2 + P + F = C) Gibbs was awarded the Copley Medal in 1901.

Glass, Sir Patrick Geddes.

Scottish biologist and sociologist (1854-1932)
Ghadas received his education at the hands of the great biologist Huxley (Huxley from 1825 to 1895) and was influenced by Darwin's views and their application to society, as well as the views of Lamark, Spencer and Bergson.
Adass worked as a professor of botany at the University of Dundee in Scotland and also worked as a professor of sociology in Pompeii in India. And he worked as director of the Scots College in Montpellier • Kafa lentils in order to link evolution with ethics and link biology with history and sociology.
In his later years, he focused his attention on social aspects.
He was a pioneer in town and country planning. The scientific and economic reform has occupied the majority of Ghadas’ interest. He developed a number of summer schools and residential houses for students, which he called the British Halls, to facilitate the residence of students in French universities. Ghadas participated with his brother, J.A.Thomson, in writing a number of famous books on evolution and sex.

⏹ Graaf, Rainier de Graaf, Regnier de

Dutch physician and biologist (1641-1673)
. Graf studied in Louvain, Utrecht, Lin and Angers, then practiced medicine in Delft, the Netherlands.
Graf discovered the transparent spherical sacs found in the ovaries of mammals, bearing his name, Graf's vesicles, each of which contained an ovum.
It was previously thought that they are the same eggs. Graf made improvements to the methods of preserving samples in museums and developed them by applying a method based on injections with hardening materials. Among his other notable works is his study of pancreatic juice: its nature and mission.

Gram, Hans Joachim
Hans Joachim Gram

Danish physician (1938 - 1853)
Gram was known as a bacteriologist in Copenhagen who devised a method for staining bacteria with methyl violet, iodine, acetone or ethyl alcohol, hence the name “gram positive” and “gram positive gram negative”
Which is noted in explaining the characteristics of some medicines · So that those germs that do not accept dye are called negative, while those that are dyeable are called positive.

⏹ Graham, Thomas

Scottish chemist (1805 - 1869)
Graham learned in Glasgow at the hands of the famous scientist Thomson, then he worked as a professor of chemistry at University College in London, but he soon resigned to head the mint, and he was chosen as a fellow of the Royal Society, and he is one of the most prominent founders of the foundations of physical chemistry.
He has extensive and important research on gases, especially with regard to absorption, gaseous diffusion, and osmotic property.
Graham discovered the properties of colloidal solutions and methods of separating them through membranes. • Chaired the London Chemical Society and the Cavendish Society ». Now known by its name is a law about the diffusion of gases called “Graham’s Law”, which states: The speed of diffusion of gas is inversely proportional to the square root of the density of that gas.