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Bjerrum Length In Water In Nanometers
Bjerrum may refer to: ;People * Niels Janniksen Bjerrum (1879–1958), Danish chemist (son of Jannik Petersen Bjerrum and father of Jannik Bjerrum) * Jannik Bjerrum (1909–1992), Danish chemist (son of Niels Janniksen Bjerrum) * Jannik Petersen Bjerrum (1851–1920), Danish ophthalmologist (father of Niels Janniksen Bjerrum) * Kirstine Bjerrum Meyer (1861–1941), Danish physicist (sister of Jannik Petersen Bjerrum) ;Other uses * Bjerrum plot A Bjerrum plot (named after Niels Bjerrum; sometimes also known as a Sillén diagram or a Hägg diagram) is a graph of the concentrations of the different species of a polyprotic acid in a solution, as a function of pH, when the solution is a ... * Bjerrum defect {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niels Janniksen Bjerrum
Niels Janniksen Bjerrum (11 March 1879 in Copenhagen – 30 September 1958) was a Danish chemist. Niels Bjerrum was the son of ophthalmologist Jannik Petersen Bjerrum, and started to study at University of Copenhagen in 1897. He received his Master's degree in 1902 and his Doctor's degree in 1908, and did research in coordination complex chemistry under Sophus Mads Jørgensen. He became a docent in 1912, and in 1914 he became professor of chemistry at the Royal Agricultural College (''Landbohøjskolen'') in Copenhagen, as successor of Odin Tidemand Christensen. He stayed on this post until his retirement in 1949, and from 1939 to 1946 he was also the Director of the College. Importantly, Bjerrum introduced the concept of three forms of molecular energy, translational, vibrational and rotational which was important in understanding vibrational spectroscopy. He is also noted for the theory behind the Bjerrum length, and the Bjerrum plot. Bjerrum also performed some of the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jannik Bjerrum
Jannik Petersen Bjerrum (26 December 1851 – 2 July 1920) was a Danish ophthalmologist who was a native of Skærbæk, a town in the southernmost part of Jutland. In 1864 Skærbæk became part of Germany due to consequences of the Second Schleswig War. In 1876 he received his medical doctorate from the University of Copenhagen, and in 1879 became an assistant to Edmund Hansen Grut (1831-1907) at the Havnegade eye clinic. After Grut's retirement in 1896, he became director of the clinic, as well as being the second professor of ophthalmology at the University of Copenhagen, a position he would maintain until his retirement in 1910. Bjerrum made contributions regarding pathogenetic research of glaucoma, and performed extensive investigations involving campimetry. He was interested in the correlation between visual perception of form and the resolving power in localized regions of the retina. He was particularly focused on the subtleties of the central 30° of the visual field rat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jannik Petersen Bjerrum
Jannik Petersen Bjerrum (26 December 1851 – 2 July 1920) was a Danish ophthalmologist who was a native of Skærbæk, a town in the southernmost part of Jutland. In 1864 Skærbæk became part of Germany due to consequences of the Second Schleswig War. In 1876 he received his medical doctorate from the University of Copenhagen, and in 1879 became an assistant to Edmund Hansen Grut (1831-1907) at the Havnegade eye clinic. After Grut's retirement in 1896, he became director of the clinic, as well as being the second professor of ophthalmology at the University of Copenhagen, a position he would maintain until his retirement in 1910. Bjerrum made contributions regarding pathogenetic research of glaucoma, and performed extensive investigations involving campimetry. He was interested in the correlation between visual perception of form and the resolving power in localized regions of the retina. He was particularly focused on the subtleties of the central 30° of the visual fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kirstine Bjerrum Meyer
Kirstine Bjerrum Meyer (12 October 1861 – 28 September 1941) was a Danish physicist and was first woman from her country to earn a doctorate in natural sciences. Biography Kirstine Bjerrum was born in Skærbæk, Denmark and died in Hellerup. She was the daughter of Niels Janniksen Bjerrum (1826-1880) and Christiane Degn (1826-1877). She moved to Copenhagen at the age of 18, where she lived with her elder brother, ophthalmologist Jannik Petersen Bjerrum (1851–1920). In 1885, she married mathematician Adolph Constantin Meyer (1854-1896) and took his surname. Following the death of her husband in 1896, she became the sole parent of the couple's young son Johannes. In 1882, Kirstine Meyer had taken a teacher's degree from N. Zahles Skole. In 1885, she began her studies at the University of Copenhagen. In 1893, she graduated with a Master's Degree in physics. She was associated with the school from 1885 to 1909 and then continued as a censor at N. Zahles Skole for a number o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bjerrum Plot
A Bjerrum plot (named after Niels Bjerrum; sometimes also known as a Sillén diagram or a Hägg diagram) is a graph of the concentrations of the different species of a polyprotic acid in a solution, as a function of pH, when the solution is at equilibrium. Due to the many orders of magnitude spanned by the concentrations, they are commonly plotted on a logarithmic scale. Sometimes the ratios of the concentrations are plotted rather than the actual concentrations. Occasionally H+ and OH− are also plotted. Most often, the carbonate system is plotted, where the polyprotic acid is carbonic acid (a diprotic acid), and the different species are dissolved carbon dioxide, carbonic acid, bicarbonate, and carbonate. In acidic conditions, the dominant form is ; in basic (alkaline) conditions, the dominant form is ; and in between, the dominant form is . At every pH, the concentration of carbonic acid is assumed to be negligible compared to the concentration of dissolved , and so is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
