Pyrimethamine, sold under the trade name Daraprim, is an anti-parasitic medication used to treat a variety of conditions including toxoplasmosis and isosporiasis. Pyrimethamine was initially developed by Nobel Prize winning scientist Gertrude Elion as a treatment for malaria.[8][9]
The first disposable diaper was invented in 1946 by Marion Donovan, a professional-turned-housewife who wanted to ensure her children's cloth diapers remained dry while they slept.[12] Donovan patented her design (called 'Boaters') in 1951. She also invented the first paper diapers, but executives did not invest in this idea and it was consequently scrapped for over ten years, until Procter & Gamble used Donovan's design ideas to create Pampers.
A pioneering female American doctor, medical researcher and an outspoken voice in the pediatric community, the supercentenarian Leila Alice Denmark (1898–2012) is credited as co-developer of the pertussis (whooping cough) vaccine.[citation needed]
A major piece of evidence for the presence of dark matter in the Universe, discovered by Vera Rubin from observations of galactic rotation curves in the 1970s.
Merieme Chadid is a French and Moroccan astronomer and explorer who discovered hypersonic shock waves in variable stars as well as the first astronomer committed to install a large observatory at the heart of Antarctica towards an understanding of stellar evolution in the Universe by leading scientific polar explorations.
Cecilia Payne-Gaposchkin found in her 1925 PhD thesis that stars are primarily composed of hydrogen and helium. Thus, her thesis established that hydrogen is the most abundant element in the Universe.[16]
When Payne's dissertation was reviewed, astronomer Henry Norris Russell dissuaded her from concluding that the composition of the Sun was predominantly hydrogen and thus very different from that of the Earth, as it contradicted the accepted wisdom at the time. She consequently described the result in her thesis as "spurious".[16] Russell realized she was correct four years later after having derived the same result by different means and publishing it in 1929. He acknowledged Payne's work and discovery admiringly in his paper but he is often credited for the conclusions they both reached.[17][18][19]
Marie Curie (born Maria Salomea Skłodowska) was the first woman to receive a Nobel prize for her works on radiations and, up until today,[when?] the only woman to receive two Nobel prizes (among them, one Nobel prize in chemistry for discoveries on polonium and radium). She is the sole laureate to be recognized within two distinct scientific areas.
Fanny Gates further investigated the properties of radiation. Together with Ernest Rutherford, she amassed evidence that radioactivity was not the result of any simple chemical or physical processes.[21] In particular, Gates showed that radioactivity could not be destroyed by heat or ionization due to chemical reactions, and that radioactive materials differ from phosphorescent materials both qualitatively and quantitatively.[22]
In 1901, Harriet Brooks and Ernest Rutherford contributed to the discovery of the element radon by finding evidence that the "emanation" emitted by thorium compounds was likely to be a gas.[23] This follows work in 1899 by Pierre and Marie Curie, who observed that the gas emitted by radium remained radioactive for a month.[24]
Emilie du Châtelet (born Gabrielle Émilie Le Tonnelier de Breteuil) translated Isaac Newton's Principia Mathematica from Latin to French during the 18th century. She carried out physics experiments, popularizing the work of Leibniz. She demonstrated that the kinetic energy of an object was proportional to its mass and the square of its velocity, and postulated a conservation law for the total energy of a system.
In 1939, Marguerite Perey, a student of Marie Curie, discovered the element francium by purifying samples of lanthanum that contained actinium. Perey first noticed that the actinium she purified was emitting unexpected radiation. After further study she was able to isolate this new element which she named "francium" for France.[32]
Austrian–Swedish physicistLise Meitner, together with Otto Hahn and Otto Robert Frisch, led the small group of scientists who first discovered nuclear fission of uranium when it absorbed an extra neutron. The results were published in early 1939.[8][33] Meitner, Hahn and Frisch understood that the fission process, which splits the atomic nucleus of uranium into two smaller nuclei, must be accompanied by an enormous release of energy. Nuclear fission is the process exploited by nuclear reactors to generate heat and, subsequently, electricity.[34] This process is also one of the basics of nuclear weapons that were developed in the U.S. during World War II and used against Japan in 1945.
Heidi Jo Newberg's team found that Milky Way is cannibalizing stars from smaller galaxies[35][36][37] and that the Milky Way is larger and has more ripples than was previously understood.[38]
Donna Strickland received the 2018 Nobel Prize in Physics for the discovery of chirped pulse amplification, a technique which "paved the way towards the shortest and most intense laser pulses ever created by mankind."[39]
Rhenium, a d-blocktransition metal with Atomic number 75, was first isolated by Ida Noddack and her husband. The existence of this element was predicted by Dmitri Mendeleev. Ida Noddack was nominated three times for the Nobel Prize in Chemistry.
The technique for making Langmuir–Blodgett film, which involves immersing a substrate into a solution to deposit a monolayer of molecules onto a substrate, was co-invented by Katharine Burr Blodgett and Irving Langmuir while working for General Electric. Earlier work by Agnes Pockels influenced the development of the trough.
Zeolite Y, a molecular sieve used to catalyse fractional distillation in petroleum refining, was invented by Edith M. Flanigen while working for Union Carbide. Flanigen also co-invented a synthetic emerald and was the first female recipient of the Perkin Medal in 1992.
Irene Joliot-Curie was awarded the 1935 Nobel Prize in Chemistry for synthesis of new radioactive elements for application in medicine. The prize was shared jointly with her husband Jean Frederic Joliot.
The chemical structure was determined by Dorothy Hodgkin using crystallographic data. She was awarded the Nobel Prize in Chemistry for her work on Vitamin B12 and other complex molecules.
The in-situ atomic-resolution environmental transmission electron microscope (ETEM) was created by Pratibha Gai in 2009. This microscope allows for visualisation of chemical reactions at the atomic scale. Dame Gai decided not to patent her device, the culmination of 20 years' work, in order to further the advancement of science.
In 2015, Deepika Kurup invented a photocatalytic composite material that removes 100% of faecal coliform bacteria from contaminated water. Deepika has won the Discovery Education 3M Young Scientist Challenge award and The US Stockholm Junior Water Prize for her work.
Agnes Pockels pioneered the new discipline of surface chemistry from her kitchen after being denied formal science training due to her gender. She created the Pockels Trough to measure surface tension, published several papers and was credited by Lord Rayleigh and Irving Langmuir.
Sybil M. Rock developed the mathematical techniques used in analysing the results from mass spectrometers and devised many of the procedures for mixture analysis.
Eunice Newton Foote was the first scientist to make the connection between the amount of carbon dioxide in our atmosphere and climate change in 1856. She discovered the warming properties of carbon dioxide and the "greenhouse effect." She was able to submit her experiment and findings at the annual meeting of the American Association for the Advancement of Science (AAAS); however, because she was a woman and not able to be a member of the organization, Professor Joseph Henry of the Smithsonian Institution presented her findings.
The term was coined by Carolyn Bertozzi in 2003. Since its introduction, the concept of the bioorthogonal reaction has enabled the study of biomolecules such as glycans, proteins, and lipids
Discovered in 1936 by Danish seismologist Inge Lehmann. Through her work on seismology she was able to conclude that the Earth had a solid inner core and a molten outer core to explain inconsistencies in seismic wave data from earth quakes.
Documentation of all volcanos in planet Earth.
In February 2005, Rosaly Lopes – planetary scientist and volcanologist – wrote "Volcano Adventure Guide", in order to document every single volcano on planet Earth through a variety of aspects. This is the only book that addresses all volcanos on Earth; it provides information such as: volcano behavior, types of eruptions, dangers, maps, and even travel tips.
Householdedit
Square-bottom paper bag
In 1868, Margaret Knight invented a machine that folded and glued flat-bottomed brown paper bags familiar to shoppers today. She obtained 87 US patents that include lid-removing pliers, a numbering machine, a window frame and sash, and variants on rotary engines.[41]
In 1892, Sarah Boone obtained a patent in the United States for improvements to the ironing board, allowing for better quality ironing for shirt sleeves.[42]
In 1919, Alice Parker invented a system of gas-powered central heating. While her particular design was never built, it was the first time an inventor had conceived of using natural gas to heat a personal home, which inspired the future central heating systems.
Automatic Rotimaker
In 2008, Pranoti Nagarkar-Israni invented a kitchen robot called Rotimatic, which makes rotis, tortillas, pizza crusts and puris in under a minute. She has obtained 6 patents. The product makes use of artificial intelligence and Internet of Things to understand user requirements and improve itself after each use.
Hungarian-American MIT inventor Mária Telkes and American architect Eleanor Raymond created, in 1947, the Dover Sun House, the first house powered by solar energy.
Wrinkle-free fiber
Wrinkle-free fiber invented by Ruth R. Benerito The invention was said to have "saved the cotton industry".
The hot comb was an invention developed in France as a way for women with coarse curly hair to achieve a fine straight look traditionally modeled by historical Egyptian women.[44] However, it was Annie Malone who first patented this tool, while her protégé and former worker, Madam C. J. Walker, widened the teeth.[45]
Mary Anderson is credited for inventing the first functional windscreen wiper in 1903. Two other inventors, Robert Douglass and John Apjohn, also patented windscreen cleaning devices in the same year.
Car heater
Margaret A. Wilcox invented an improved car heater, which directed air from over the engine to warm the chilly toes of aristocratic 19th-century motorists, in 1893. She also invented a combined clothes and dish washer.[46][unreliable source?]
Patented by Sarah Mather in 1845, this permitted sea-going vessels to survey the depths of the ocean.[47][48] It used a camphine lamp in a glass globe that was sunk in the water. The device allowed examination of the hull and other details from a person on the deck of a boat.[49] In 1864 Sarah Mather improved her invention to detect Confederate underwater warships.[50]
During a nine-month period in 1842–43, Ada Lovelace translated the memoir of Italian mathematician Luigi Menabrea. The memoir covered the Analytical Engine. The translation contained Note G which completely detailed a method for calculating Bernoulli numbers using the Analytical Engine. This note is recognized by some historians as the world's first written computer program.[51]
In 1966, Mark Kac asked whether the shape of a drum could be determined by the sound it makes (whether a Riemannian manifold is determined by the spectrum of its Laplace–Beltrami operator). John Milnor observed that a theorem due to Witt implied the existence of a pair of 16-dimensional tori that have the same spectrum but different shapes. However, the problem in two dimensions remained open until 1992, when Carolyn S. Gordon with coauthors Webb and Wolpert, constructed a pair of regions in the Euclidean plane that have different shapes but identical eigenvalues (see figure on right).[53]
In classical mechanics, the precession of a rigid body such as a top under the influence of gravity is not, in general, an integrable problem. There are however three (or four) famous cases that are integrable, the Euler, the Lagrange, and the Kovalevskaya top.[56][57] The Kovalevskaya top[58][59] is a special symmetric top with a unique ratio of the moments of inertia which satisfy the relation
That is, two moments of inertia are equal, the third is half as large, and the center of gravity is located in the plane perpendicular to the symmetry axis (parallel to the plane of the two equal points).
Hilbert's tenth problem is the tenth on the list of mathematical problems that the German mathematician David Hilbert posed in 1900. It is the challenge to provide a general algorithm which, for any given Diophantine equation (a polynomial equation with integer coefficients and a finite number of unknowns) can decide whether the equation has a solution with all unknowns taking integer values.
For example, the Diophantine equation has an integer solution: . By contrast, the Diophantine equation has no such solution.
Hilbert's tenth problem has been solved, and it has a negative answer: such a general algorithm does not exist. This is the result of combined work of Martin Davis, Yuri Matiyasevich, Hilary Putnam and Julia Robinson which spans 21 years, with Yuri Matiyasevich completing the theorem in 1970.[68] The theorem is now known as Matiyasevich's theorem or the MRDP theorem.
The three-gap theorem states that if one places n points on a circle, at angles of θ, 2θ, 3θ ... from the starting point, then there will be at most three distinct distances between pairs of points in adjacent positions around the circle. When there are three distances, the larger of the three always equals the sum of the other two.[72] Unless θ is a rational multiple of π, there will also be at least two distinct distances.
The Noether normalization lemma is a result of commutative algebra, introduced by Emmy Noether in 1926.[74] It states that for any fieldk, and any finitely generated commutative k-algebraA, there exists a nonnegative integer d and algebraically independent elements y1, y2, ..., yd in A such that A is a finitely generated module over the polynomial ring S:=k[y1, y2, ..., yd].
The isomorphism theorems were formulated in some generality for homomorphisms of modules by Emmy Noether in her paper Abstrakter Aufbau der Idealtheorie in algebraischen Zahl- und Funktionenkörpern which was published in 1927 in Mathematische Annalen. Less general versions of these theorems can be found in work of Richard Dedekind and previous papers by Noether.
Three years later, B.L. van der Waerden published his influential Algebra, the first abstract algebra textbook that took the groups-rings-fields approach to the subject. Van der Waerden credited lectures by Noether on group theory and Emil Artin on algebra, as well as a seminar conducted by Artin, Wilhelm Blaschke, Otto Schreier, and van der Waerden himself on ideals as the main references. The three isomorphism theorems, called homomorphism theorem, and two laws of isomorphism when applied to groups, appear explicitly.
In mathematics, the Lasker–Noether theorem states that every Noetherian ring is a Lasker ring, which means that every ideal can be decomposed as an intersection, called primary decomposition, of finitely many primary ideals (which are related to, but not quite the same as, powers of prime ideals). The theorem was first proven by Emanuel Lasker (1905) for the special case of polynomial rings and convergent power series rings, and was proven in its full generality by Emmy Noether (1921).
Gerty Cori, together with Carl Ferdinand Cori, discovered the Cori cycle, the metabolic pathway in which lactate produced by anaerobic glycolysis in the muscles moves to the liver and is converted to glucose, which then returns to the muscles and is metabolized back to lactate.[83]
Barbara McClintock discovered transposable elements (also known as transposons and jumping genes), DNA sequences which change their position within the genome. Transposons make up a large fraction of the DNA in eukaryotic cells (44% if the human genome[85] and 90% of the maize genome[86][87]) and play an important role in genome function and evolution.[88] In Oxytricha, which has a unique genetic system, these elements play a critical role in development.[89]
May-Britt Moser, together with Edvard Moser and their students Torkel Hafting, Marianne Fyhn and Sturla Molden, discovered grid cells, cells which contribute to the brain's positioning and navigation system. The grid cells of a freely moving animal fire when the animal is near the vertices of a hexagonal grid in the environment.[93]
Katharine Cook Briggs and her daughter Isabel Briggs Myers invented this psychological test, where participants answer an introspective self-report questionnaire. The result takes the form of 16 types, indicating the psychological preferences of the participant.
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