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Scientists
This category is for questions about the people who apply the scientific method to solve problems, introduce new concepts, and strive to explain the natural world.
9,527 Questions
When did Robert Koch find pathogen?
Robert Koch is associated with Koch's postulates, which must be satisfied before it can be accepted that particular bacteria cause particular diseases. He was first published in 1876. He did his first work with Anthrax. Later he developed methods using media like potatoes and later with Petri used what is still being used to grow bacteria, Petri dishes.
Who invented the first primitive electric battery called the voltaic cell?
Alessandro Volta (1745-1827) invented the voltaic cell, the first electric battery, in 1800.
What do you call a scientist who studies the ocean?
An Oceanographer. Marine Biologist, that sort of thing.
Is Caroline Crocker the teacher of intelligent design a Christian?
Additional Comment:
Yes, I believe she is a Baptist who has a PhD in immuno-pharmacology/biology.
In the related links box below, I posted Building A 250,000 Volt Tesla Coil.
How did Rene descartes discovered the cartesian?
He did not have to. Anything which was named after him was called Cartesian, so it must have been quite easy for him.
Auto biography of Alexander Fleming?
Alexander Fleming Biography / Autobiography / Memoir resources
Full Name: Sir Alexander Fleming
Date of Birth: August 6, 1881
Place of Birth: Ayrshire, Scotland
Died: March 11, 1955
Place of Death: London , England
Classification: Scientists & Thinkers
Short Biography of Alexander FlemingWith his almost accidental discovery of Penicillin and the resulting millions of lives saved from its practical use, Alexander Fleming's work has gone down in history as one the most significant contributions to all mankind.
Born in Scotland, Alexander Fleming was able to attend medical school at Saint Mary's Hospital in London. In 1906, he became a doctor and did so well in school that he was invited to study to be a surgeon. He declined the offer in order to work under the school's research department to work on vaccines and immunology. With World War I on the rise, Alexander Fleming became captain of the Army Medical Corps as he worked on the battlefields of Western France. After the war, he returned to St. Mary's where he became a lecturer and continued researching bacteriology.
What sparked Alexander's curiosity the most was why antiseptics couldn't be used to treat deep wounds. He noticed that soldiers treated with them were worse off than if they hadn't used anything at all. He worked to promote the use of antiseptics only on minor scrapes and cuts. He knew that deeper wounds had a high chance of infection. He theorized that something else was needed to help fight bad bacteria, while preserving the good bacteria, namely lysozyme.
Alexander wasn't known to be the tidiest of men, even in his laboratory and upon returning from vacation, he discovered most of his dishes had been overtaken with fungi. However, upon closer examination of one dish, he noticed there were no fungi around its brim. Interested in what would have prevented the bacteria growth, he took a sample from the small dish and discovered that a bacteria he called penicillin had prevented the spread of the other bacteria. Elated, he decided to have other researches help him with his experiments. Not sure whether they would be able to reproduce the penicillin in the laboratory, not to mention for mass production, Fleming never thought his discovery would go as far.
It was the work of Howard Florey, a prominent scientist at the Sir William Dunn School of Pathology, who decided to research Fleming's discoveries further. With the help of Ernst Chain, they were able to isolate the penicillin in hopes they would be able to make enough pure samples to begin their tests on small animals. It worked and they began seeing the dramatic effects penicillin had on even the worst infections.
Through their experiments, Fleming realized the newfound drug would have to be used in high doses and for an extended amount of time. If not, the infecting bacteria would become resistant to the first antibiotic. In 1945, Fleming, Chain, and Florey were awarded the Nobel Peace Prize in Medicine.
Did Mendel make a major contribution to the cell theory?
Yes. Gregor Mendels 3 Principals of Inheritance show the transmission of genetic traits.
What was john snow's hypothesis for the 1853-1854 colera apidemic?
it was due to gulier foam from rabbid rats. The foam would then flow into the water and Mix. This would then be called gulier liquid.
Rene descartes has been called the father of modern what?
Rene Descartes 1596-1650, a Frenchman who spent most of his living days in the former Dutch Republic. Descartes who is also known as the Father of Modern Philosophy due to much of his work still heavily influencing philosophy today.
What was Niels Bohr's address in 1941?
Since the 1930's he had lived in a honorary house put a his disposal by the 'Carlsberg trust'. He lived here when Heisenberg and him had their famous meeting in 1941.
You can see the building on this map : http://www.carlsbergbyen.dk/62/carlsbergs-akademi/
It's on the old premises of the Carlsberg brewery, which are currently being turned into a new housing and shopping area while maintaining the best of the old structures including the honorary house.
Why do scientists use telescopes?
Telescopes collect electromagnetic radiation. This radiation may be at wavelengths that the human eye can not see thereby giving us images of the universe that would otherwise be invisible to us. With visible radiation the telescope gathers more light than can pass naturally through the pupil of the human eye and therefore concentrates the light allowing us to see fainter objects or to magnify and resolve features on distant objects. A telescope can also be used as a platform on which to attach other scientific instruments (such as spectrometers) allowing scientists to analyse the information about distant objects contained in the light from those objects.
Marketers use different methods to target teenager?
Yes. They use techniques such as using actors that are in their teens or early twenties, and using music that is popular among teenagers. They may also take advantage of the way they think teens feel, such as making a parent look dumb in a commercial, or showing an interaction between a person that belongs to a clique and another person.
Science, like the universe, is nearly infinite in its variety. A few of them for starters would be Math, Medicine, Architecture, Biology, Engineering, Astronomy, Physics, and all fields of Technology. Science even crosses over to study Art, Religion, Language, and Politics.
Who shot gold with radiation to show atoms are mostly empty space?
The experiment you're asking about was performed by Ernest Rutherford, and it's one of the most important experiments in our quest to understand the nature of atoms. We call this experiment the gold foil experiment. What Rutherford did was shoot alpha particles, which are just charged helium atoms, at thin gold foil. Most of the alpha particles passed right through the gold foil. Some of the particles would deflect by a small angle. Occasionally, though, some of the particles would shoot back at the alpha emitter or off at a sharp angle. Before this experiment one of the more popular atomic models was the "plum pudding" model. This model said that protons and electrons filled up all the space of the atom equally. We know now, and because of this experiment, that protons are located at the very center of an atom and they take up very little space. If the plum pudding model were correct you would expect the particles to all act the same; either all of them would be reflected in the same direction or all of them would pass through. But, if the protons were all tightly packed in the center you would expect most of the alpha particles to pass straight through the gold foil because they are just passing through empty space. Occasionally one might get close and be deflected a little bit. Even more rarely you would expect to see some of the alpha particles shoot right back at you. These are exactly the results you see from the gold foil experiment and they show us that atoms are mostly empty space.
What did Galileo galili identify?
Galileo Galilei identified the moons of Jupiter, sunspots, the phases of Venus, and the craters on the Moon. He also made significant contributions to the development of the telescope and the scientific method.
Is The Fabulous Moolah considered the greatest woman wrestler of all time?
Though she is and probably always hold the record as the longest reigning "Women's Champ" (over 27 years for one title...continuously [i.e. no breaks in championship service]), which would be a very viable argument for the distinction as the greatest female wrestler of all time, that distinction is purely opinion and no amount of achievements could truly create the opinion as a fact. Keep in mind that times are different and so are competitors. Imagine if The Fabulous Moolah had competitors such as Trish Stratus or Wendy Richter (the female wrestler who finally took the belt from Moolah in the early 80's) when she was much younger. There is a championship committee that decides who wears the belts and their decisions are based not on talent, but the most probable scenario to sell tickets! Had Moolah won her championship in an era where women's matches were as popular as they are today, it's not very likely she's have been given the belt for so long. Not taking anything away from her as she is a very talented performer, but putting the question in perspective, it is an opinion that you are asking for and there will be as many opinions as there are people to have the opinions. But, to put it in a short way, yes
Why do scientists revise theories?
By definition a Theory is nothing more than an unproven idea, and therefore until it becomes proven (and a Fact) is subject to change as more information about the area of study becomes available. Until it can be proven 100% of the time (e.g. Gravity) it will remain a Theory, and no matter how sound will be subject to revision until it can be proven 100% of the time.
What antibiotic did filipino doctor abelardo aguilar co-discover?
Doctor Abelardo Aguilar co-discovered the antibiotic called erythromycin. In 1949, Dr. Aguilar shipped soil sample that contained a strain Streptomyces erythreus to Eli Lillyâ??s research team. This antibiotic was isolated from this strain.
