55 The following year, pauling published what he regarded as his most important paper, in which he first laid out the concept of hybridization of atomic orbitals and analyzed the tetravalency of the carbon atom. 56 At Caltech, pauling struck up a close friendship with theoretical physicist Robert Oppenheimer, who spent part of his research and teaching schedule away from. Berkeley at Caltech every year. 57 58 pauling was also affiliated to uc berkeley as Visiting Lecturer in Physics and Chemistry from 19291934. 59 Oppenheimer even gave pauling a stunning personal collection of minerals. 60 The two men planned to mount a joint attack on the nature of the chemical bond: apparently Oppenheimer would supply the mathematics and pauling would interpret the results. Their relationship soured when Oppenheimer tried to pursue pauling's wife, ava homework helen. When pauling was at work, oppenheimer came to their home and blurted out an invitation to ava helen to join him on a tryst in Mexico. She flatly refused, and reported the incident to pauling.
2 pauling became interested in how quantum mechanics might be applied in his chosen field of interest, the electronic structure of atoms and molecules. In Zürich, pauling was also exposed to one of the first quantum mechanical analyses of bonding in the hydrogen molecule, done by walter heitler and Fritz london. 50 pauling devoted the two years of his European trip to this work and decided to make it the focus of his future research. He became one of the first scientists in the field of quantum chemistry and a pioneer in the application of quantum theory dissertation to the structure of molecules. 51 In 1927, pauling took a new position as an assistant professor at Caltech in theoretical chemistry. 52 he launched his faculty career with a very productive five years, continuing with his X-ray crystal studies and also performing quantum mechanical calculations on atoms and molecules. He published approximately fifty papers in those five years, and created the five rules now known as pauling's rules. 53 54 by 1929, he was promoted to associate professor, and by 1930, to full professor. 52 In 1931, the American Chemical Society awarded pauling the langmuir Prize for the most significant work in pure science by a person 30 years of age or younger.
45 Lost on a sea cliff edit On January 30, 1960, pauling and his wife were using a cabin about 80 miles (130 km) south of Monterey, california, and he decided to go for a walk on a coastal trail. He got lost and tried to climb the rocky cliff, but reached a large overhanging rock about 300 feet (90 m) above the ocean. He decided it was safest to stay there, and meanwhile he was reported missing. He spent a sleepless night on the cliff before being found after almost 24 hours. 46 pauling died of prostate cancer on August 19, 1994, at 19:20 at home in Big Sur, california. 11 he was 93 years old. 47 A grave marker for pauling was placed in Oswego pioneer Cemetery in lake oswego, oregon by his sister pauline, 48 49 but pauling's ashes, along with those of his wife, were not buried there until 2005. 48 In 1926 pauling was awarded a guggenheim Fellowship to travel to europe, to study under German physicist Arnold Sommerfeld in Munich, danish physicist niels Bohr in Copenhagen and Austrian physicist Erwin Schrödinger in Zürich. All three were experts in the new field of quantum mechanics and other branches of physics.
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1 His graduate research involved the use of X-ray diffraction to determine the structure of crystals. He published seven papers on the crystal structure of minerals while he was at Caltech. He received his PhD in physical chemistry and mathematical physics, 3 summa cum laude, in 1925. 40 Personal life edit The pauling children at a gathering in celebration of the 1954 Nobel Prizes in Stockholm, Sweden. Seated from left: Linus pauling,., peter pollution pauling and Linda pauling. Standing from left: an unidentified individual and Crellin pauling pauling married ava helen Miller on June 17, 1923. The marriage lasted until ava pauling's death in 1981.
They had four children. 41 Linus Carl. (born 1925) became a psychiatrist ; Peter Jeffress (19312003) a crystallographer ; Edward Crellin (19371997) a biologist ; and Linda helen (born 1932) married noted Caltech geologist and glaciologist Barclay kamb. 42 pauling was raised as a member of the lutheran Church, 43 but later joined the Unitarian Universalist Church. 44 Two years before his death, in a published dialogue with Buddhist philosopher daisaku ikeda, pauling publicly time declared his atheism.
30 Higher education edit In his first semester, pauling registered for two courses in chemistry, two in mathematics, mechanical drawing, introduction to mining and use of explosives, modern English prose, gymnastics and military drill. 31 he was active in campus life and founded the school's chapter of the delta Upsilon fraternity. 32 After his second year, he planned to take a job in Portland to help support his mother. The college offered him a position teaching quantitative analysis, a course he had just finished taking himself. He worked forty hours a week in the laboratory and classroom and earned 100 a month, enabling him to continue his studies. 33 In his last two years at school, pauling became aware of the work of Gilbert.
Lewis and Irving Langmuir on the electronic structure of atoms and their bonding to form molecules. 33 he decided to focus his research on how the physical and chemical properties of substances are related to the structure of the atoms of which they are composed, becoming one of the founders of the new science of quantum chemistry. Engineering professor Samuel Graf selected pauling to be his teaching assistant in a mechanics and materials course. 35 36 During the winter of his senior year, pauling taught a chemistry course for home economics majors. It was in one of these classes that pauling met his future wife, ava helen Miller. 35 : In 1922, pauling graduated from Oregon State University 4 (known then as Oregon Agricultural College) with a degree in chemical engineering. He went on to graduate school at the california institute of Technology (Caltech) in Pasadena, california, under the guidance of Roscoe dickinson and Richard Tolman.
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25 The school awarded him an honorary diploma 45 years later, after he was awarded two nobel Prizes. Pauling held a number of jobs to earn money for his essay future college expenses, including working part-time at a grocery store for 8 per week. His mother arranged an interview with the owner of a number of manufacturing plants in Portland,. Schwietzerhoff, who hired him as an apprentice machinist at a salary of 40 per month. This was soon raised to 50 per month. 28 pauling also set up a photography laboratory with two friends. 29 In September 1917, pauling was finally admitted by Oregon State University. He immediately resigned from the machinist's job and informed his mother, who saw no point in a university education, of his plans.
He died of a perforated ulcer on June 11, 1910, leaving Lucy to care for Linus, lucile and game pauline. 20 pauling attributes his interest in becoming a chemist to being amazed by experiments conducted by a friend, Lloyd. Jeffress, who had a small chemistry lab kit. 21 he later wrote: "I was simply entranced by chemical phenomena, by the reactions in which substances, often with strikingly different properties, appear; and I hoped to learn more and more about this aspect of the world." 22 In high school, pauling conducted chemistry experiments. With an older friend, Lloyd Simon, pauling set up Palmon Laboratories in Simon's basement. They approached local dairies offering to perform butterfat samplings at cheap prices but dairymen were wary of trusting two boys with the task, and the business ended in failure. 23 At age 15, the high school senior had enough credits to enter Oregon State University (osu known then as Oregon Agricultural College. 24 Lacking two American history courses required for his high school diploma, pauling asked the school principal if he could take the courses concurrently during the spring semester. Denied, he left Washington High School in June without a diploma.
Prizes, 13 and one of two people to be awarded Nobel Prizes in different fields, the other being Marie curie. 12 Contents Early life and education edit Photo of Herman Henry william pauling, linus pauling's father, taken. 1900 pauling was born in Portland, Oregon, 14 15 the first-born child of Herman Henry william pauling (18761910) and Lucy Isabelle "Belle" Darling (18811926). 16 he was named "Linus Carl in honor of Lucy's father, linus, and Herman's father, carl. 17 In 1902, after his sister pauline was born, pauling's parents decided to move out of Portland, to find more affordable and spacious living quarters than their one-room apartment. 18 Lucy stayed with her husband's parents in lake oswego until Herman brought the family to salem, where he worked briefly as a traveling salesman for the skidmore Drug Company. Within a year of Lucile's birth in 1904, herman pauling moved his family to Oswego, where he opened his own drugstore. 18 he moved his family to condon, Oregon in 1905. 19 by 1906, herman pauling was suffering from recurrent abdominal pain.
Pauling also worked on the structures of biological molecules, and showed the importance of the alpha helix and beta sheet in protein secondary structure. Pauling's approach dissertation combined methods and results from. X-ray crystallography, molecular model building and quantum chemistry. His discoveries inspired the work. James Watson, francis Crick, and, rosalind Franklin on the structure of dna, which in turn made it possible for geneticists to crack the dna code of all organisms. 9, in his later years he promoted nuclear disarmament, as well as orthomolecular medicine, megavitamin therapy, 10 and dietary supplements. None of the latter have gained much acceptance in the mainstream scientific community. 6 11 For his scientific work, pauling was awarded the nobel Prize in Chemistry in 1954. For his peace activism, he was awarded the nobel peace Prize in 1962.
Linus pauling - wikipedia
Kalkulator, wybierz produkt który ciebie interesuje, produkt. Typ, grubość, metoda docinania, wymiary. Szerokość (cm) - wysokość (cm) - aby zakupić towar homework o podanych wymiarach należy zakupić w sklepie, artcop sztuk. Linus Carl pauling ( /pɔlɪŋ/ ; February 28, 1901 august 19, 1994) 4 was an American chemist, biochemist, peace activist, author, educator, and husband of American human rights activist. He published more than 1,200 papers and books, of which about 850 dealt with scientific topics. 5, new Scientist called him one of the 20 greatest scientists of all time, 6 and as of 2000, he was rated the 16th most important scientist in history. 7, pauling was one of the founders of the fields of quantum chemistry and molecular biology. 8, his contributions to the theory of the chemical bond include the concept of orbital hybridisation and the first accurate scale of electronegativities of the elements.