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Oliver Wolcott Gibbs
Oliver Wolcott Gibbs (February 21, 1822 – December 9, 1908) was an American chemist. He is known for performing the first electrogravimetric analyses, namely the reductions of copper and nickel ions to their respective metals. Biography Oliver Wolcott Gibbs was born in New York City in 1822 to George and Laura Gibbs. His father, Colonel George Gibbs, was an ardent mineralogist; the mineral gibbsite was named after him, and his collection was finally bought by Yale College. Oliver was the younger brother of George Gibbs and older brother to Alfred Gibbs, who became a Union Army Brigadier General during the American Civil War. Alfred Gibbs son, John Blair Gibbs, was the Acting Assistant Surgeon killed in the Battle of Guantánamo Bay during the Spanish–American War. His mother was a granddaughter of Founding Father Oliver Wolcott, who served as Governor of Connecticut and was a signer of the United States Declaration of Independence. Entering Columbia College (n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrogravimetry
Electrogravimetry is a method used to separate and quantify ions of a substance, usually a metal. In this process, the analyte solution is electrolyzed. Electrochemical reduction causes the analyte to be deposited on the cathode. The mass of the cathode is determined before and after the experiment, and the difference is used to calculate the mass of analyte in the original solution. Controlling the potential of the electrode is important to ensure that only the metal being analyzed will be deposited on the electrode. The process is similar to electroplating. The phenomenon of polarization exerts a back EMF in electrolysis, which reduces the actual EMF of the cell. Thus electrolysis of an electrolyte is possible only when this back EMF is overcome. If two separated platinum electrodes are placed in a dilute solution of copper sulfate and if a source of potential is applied, no appreciable current will flow through the system, until some minimum potential is applied after wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City, New York
New York, often called New York City or NYC, is the List of United States cities by population, most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the List of United States cities by population density, most densely populated major city in the United States, and is more than twice as populous as second-place Los Angeles. New York City lies at the southern tip of New York (state), New York State, and constitutes the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the world by urban area, urban landmass. With over 20.1 million people in its metropolitan statistical area and 23.5 million in its combined statistical area as of 2020, New York is one of the world's most populous Megacity, megacities, and over 58 million people live within of the city. New York City is a global city, global Culture of New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Civil War
The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States. It was fought between the Union ("the North") and the Confederacy ("the South"), the latter formed by states that had seceded. The central cause of the war was the dispute over whether slavery would be permitted to expand into the western territories, leading to more slave states, or be prevented from doing so, which was widely believed would place slavery on a course of ultimate extinction. Decades of political controversy over slavery were brought to a head by the victory in the 1860 U.S. presidential election of Abraham Lincoln, who opposed slavery's expansion into the west. An initial seven southern slave states responded to Lincoln's victory by seceding from the United States and, in 1861, forming the Confederacy. The Confederacy seized U.S. forts and other federal assets within their borders. Led by Confederate President Jefferson Da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinrich Rose
Heinrich Rose (6 August 1795 – 27 January 1864) was a German mineralogist and analytical chemist. He was the brother of the mineralogist Gustav Rose and a son of Valentin Rose. Rose's early works on phosphorescence were noted in the Quarterly Journal of Science in 1821, and on the strength of these works, he was elected privatdozent at the University of Berlin from 1822, then Professor from 1832. In 1846 Rose rediscovered the chemical element niobium, proving conclusively that it was different from tantalum. This confirmed that Charles Hatchett had discovered niobium in 1801 in columbite ore. Hatchett had named the new element "columbium", from the ore in which niobium and tantalum coexist. The element was eventually assigned the name niobium by the IUPAC in 1950 after Niobe, the daughter of Tantalus in Greek mythology. In 1845 Rose published the discovery of a new element pelopium, which he had found in the mineral tantalite. After subsequent research pelopium was i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Friedrich August Rammelsberg
Karl Friedrich August Rammelsberg (1 April 1813 – 28 December 1899) was a German mineralogist from Berlin, Prussia. Life After an apprenticeship in pharmacy, he studied chemistry and crystallography at the University of Berlin, where his influences were Eilhard Mitscherlich, Heinrich Rose, Christian Samuel Weiss and Gustav Rose. His graduate thesis in 1837 dealt with cyanogen, "''De cyanogenii connubiis nonnullis''". In 1841 he became a privatdozent at the university, and in 1845 was named an associate professor of inorganic chemistry. From 1850 he taught classes at the ''Gewerbeakademie'', a vocational training academy that was a predecessor of the Technical University of Berlin. In 1874 he became a full professor of chemistry at the university and in 1883 was appointed director of the inorganic chemistry laboratory.Ram ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbia University College Of Physicians And Surgeons
Columbia University Vagelos College of Physicians and Surgeons (VP&S) is the graduate medical school of Columbia University, located at the Columbia University Irving Medical Center in the Washington Heights neighborhood of Manhattan. Founded in 1767 by Samuel Bard as the medical department of King's College (now Columbia University), VP&S was the first medical school in the Thirteen Colonies to award the Doctor of Medicine (MD) degree. Beginning in 1993, VP&S was also the first U.S. medical school to hold a white coat ceremony. According to '' U.S. News & World Report'', VP&S is one of the most selective medical schools in the United States based on average MCAT score, GPA, and acceptance rate. In 2018, 7,537 people applied and 1,007 were interviewed for 140 seats in its entering MD class. The median undergraduate GPA and average MCAT score for successful applicants in 2014 were 3.82 and 36, respectively. Columbia is third for research among American medical schools by '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Pennsylvania
The University of Pennsylvania (also known as Penn or UPenn) is a private research university in Philadelphia. It is the fourth-oldest institution of higher education in the United States and is ranked among the highest-regarded universities by numerous organizations and scholars. While the university dates its founding to 1740, it was created by Benjamin Franklin and other Philadelphia citizens in 1749. It is a member of the Ivy League. The university has four undergraduate schools as well as twelve graduate and professional schools. Schools enrolling undergraduates include the College of Arts and Sciences, the School of Engineering and Applied Science, the Wharton School, and the School of Nursing. Among its highly ranked graduate schools are its law school, whose first professor wrote the first draft of the United States Constitution, its medical school, the first in North America, and Wharton, the first collegiate business school. Penn's endowment is US$20.7 billion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Hare (chemist)
Robert Hare (January 17, 1781 – May 15, 1858) was an early American chemist and professor. Biography Hare was born in Philadelphia, Pennsylvania, on January 17, 1781. He developed and experimented with the oxy-hydrogen blowpipe, with Edward Daniel Clarke of Oxford, shortly after 1800. He married Harriett Clark and had six children. In 1802, Hare was elected a member of the American Philosophical Society. He was a professor at the University of Pennsylvania between 1810 and 1812 and between 1818 and 1847. By the 1820s, Hare had developed the "galvanic deflagrator", a type of voltaic battery having large plates used for producing rapid and powerful combustion.Kneeland, Timothy W. (2008). ''Robert Hare: Politics, Science, and Spiritualism in the Early Republic''. The Pennsylvania Magazine of History and Biography. Vol. 132, No. 3. pp. 245-260. He was elected an Associate Fellow of the American Academy of Arts and Sciences in 1824. Hare died in Philadelphia on May 15, 1858. Spi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbia University
Columbia University (also known as Columbia, and officially as Columbia University in the City of New York) is a private research university in New York City. Established in 1754 as King's College on the grounds of Trinity Church in Manhattan, Columbia is the oldest institution of higher education in New York and the fifth-oldest institution of higher learning in the United States. It is one of nine colonial colleges founded prior to the Declaration of Independence. It is a member of the Ivy League. Columbia is ranked among the top universities in the world. Columbia was established by royal charter under George II of Great Britain. It was renamed Columbia College in 1784 following the American Revolution, and in 1787 was placed under a private board of trustees headed by former students Alexander Hamilton and John Jay. In 1896, the campus was moved to its current location in Morningside Heights and renamed Columbia University. Columbia scientists and scholars have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbia College Of Columbia University
Columbia College is the oldest undergraduate college of Columbia University, situated on the university's main campus in Morningside Heights in the borough of Manhattan in New York City. It was founded by the Church of England in 1754 as King's College, receiving a royal charter from King George II of Great Britain. It is the oldest institution of higher learning in the state of New York and the fifth oldest in the United States. Columbia College (along with Columbia Engineering) is distinctive for its comprehensive Core Curriculum and is among the most selective colleges in its admissions. History Columbia College was founded as King's College, by royal charter of King George II of Great Britain, in the Province of New York in 1754. Due in part to the influence of Church of England religious leaders, a site in New York City in the Trinity Church yard, Wall Street on the island of Manhattan was selected, however it would only remain at this site for less than a decade. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Declaration Of Independence
The United States Declaration of Independence, formally The unanimous Declaration of the thirteen States of America, is the pronouncement and founding document adopted by the Second Continental Congress meeting at Pennsylvania State House (later renamed Independence Hall) in Philadelphia, Pennsylvania, on July 4, 1776. Enacted during the American Revolution, the Declaration explains why the Thirteen Colonies at war with the Kingdom of Great Britain regarded themselves as thirteen independent sovereign states, no longer subject to British colonial rule. With the Declaration, these new states took a collective first step in forming the United States of America and, de facto, formalized the American Revolutionary War, which had been ongoing since April 1775. The Declaration of Independence was signed by 56 of America's Founding Fathers, congressional representatives from New Hampshire, Massachusetts Bay, Rhode Island and Providence Plantations, Connecticut, New York, New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Governor Of Connecticut
The governor of Connecticut is the head of government of Connecticut, and the commander-in-chief of the U.S. state, state's Connecticut Military Department, military forces. The Governor (United States), governor has a duty to enforce state laws, and the power to either approve or veto bills passed by the Connecticut General Assembly and to convene the legislature. Unusual among U.S. governors, the Governor of Connecticut has no power to pardon. The Governor of Connecticut is automatically a member of the state's Bonding Commission. He is an ex-officio member of the board of trustees of the University of Connecticut and Yale University. There have been 69 post-Revolution governors of the state, serving 73 distinct spans in office. Four have served non-consecutive terms: Henry W. Edwards, James E. English, Marshall Jewell, and Raymond E. Baldwin. The longest terms in office were in the state's early years, when four governors were elected to nine or more one-year terms. The longest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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