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Who Discovered Myocardial Infarction

Who Discovered Myocardial Infarction
Myocardial Infarction, more commonly referred to as heart attack, occurs when there is lack of oxygen in some parts of the heart due to insufficient blood supply. The most common cause of myocardial infarction is blocked artery or arteries of the heart which impedes blood supply thereby resulting in oxygen not being pumped properly through the heart. This cycle causes heart cells to die, which in turn results in a heart attack. Who Discovered Myocardial Infarction? Studies show that heart disease was first discovered as early as 1550 B.C. by early Egyptians. Scrolls and papyri discovered back in the 1800s contain documentations enumerating how the early Egyptians detected heart diseases and cardiac failure, proving that as early as the 15th B.C., people were already being treated for myocardial infarction. Furthermore, there were details included in the scrolls where certain surgery procedures including operating on the chest indicate that indeed early Egyptians were already...

Who Discovered the Constellation Aries?

Who Discovered the Constellation Aries?
While facts about the constellation Aries are well known, its discoverer is still a mystery. Its existence was known to the Greeks. The Egyptians, Babylonians and other ancient civilizations were aware of its existence too. Facts and Figures The constellation’s symbol is the ram and has an area of 441 sq degrees. It has four stars with planets. There are two bright stars and two nearby. There are six meteor showers (the May, Autumn, Delta, Epsilon, Daytime Arietids, and the Aries Triangulids). The constellations in the vicinity are Taurus, Perseus, Pisces, Cetus and Triangulum. A study of the facts about the constellation Aries show the best time to view it is at + 90 degrees and – 60 degrees on 9:00 PM in December. Noteworthy Stars Alpha Arietis (Hamal) has a magnitude of 2, the brightest star in Aries. It has a reddish hue. It is 5 times bigger than the Sun and 55 times brighter. Beta Arietis has a magnitude of 2.7 and more than 60 light years away. The Gamma Arietis is a double...

Who Discovered Hydrogen?

Who Discovered Hydrogen?
Known as an odorless, colorless and nonmetallic flammable gas, hydrogen is one of the most abundant elements in the universe. This element is important to the formation of stars belonging in the main sequence. However, the gas is very rare in our planet. The chemical element has various industrial uses. Moreover, the element is important to the discovery of the atomic structure. To learn more about this element, it is best if we start with the history of the discovery of hydrogen. Historical Background Who discovered hydrogen? Henry Cavendish discovered the element in 1776. He found out that various elements including hydrogen composed water. Cavendish also discovered the gas from a certain metal-acid experiment that he performed. Antoine Lavoisier named the gas hydrogen in 1783 when he and Pierre-Simon Laplace proved the findings of Cavendish that water could be produced when the gas is burned. The element was first liquefied in 1898 by James Dewar. He did this with the use of a vacuum...

Who Discovered Nickel?

Who Discovered Nickel?
Known as a chemical element that is identified with the atomic number of 28 and symbol of Ni, nickel is a metal that is ductile and hard. This element is classified under the transition metals. The metal is usually present in alloys like taenite and kamacite. It is also present in iron meteorites. Because of the distinct characteristics or properties of this element, it is widely used in producing metal apparatuses. In order to know more about this element, it is best if we start with the history of the discovery of nickel. Historical Background Who discovered nickel? This transition element was discovered by Swedish chemist Axel Fredrik Cronstedt in 1751. The discovery of the element happened when the chemist isolated copper from niccolite. Instead of extracting the metal, he isolated another element with silvery white color that Cronstedt named nickel. Even if Cronstedt was recognized as the scientist who discovered the element, there were evidences, which proved that nickel was used...

Who Discovered Aluminum?

Who Discovered Aluminum?
Though today it is one of the most common metals in the world, there was a time when aluminum was actually one of the rarest and most precious. It took the scientists who discovered aluminum years of experimentation before they succeeded in refining this elusive element. Aluminum originates from the compound “alum,” given that name by French chemist and politician Louis-Bernard Guyton de Morveau in 1761. From as far back as 1787, scientists had hypothesized the existence of an unknown base metal in alum. While not quite the man who discovered aluminum, British chemist and inventor Sir Humphry Davy, can be credited for naming it (first as “alumium” before being given its current designation) in 1808. It was in 1825 when a Danish chemist and physicist named Hans Christian Oersted developed a way of extracting small amounts of aluminum from alum by having anhydrous aluminum chloride react with potassium amalgam to produce a chunk of metal with properties similar to those of tin. German...