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Water Chlorination
Water chlorination is the process of adding chlorine or chlorine compounds such as sodium hypochlorite to water. This method is used to kill bacteria, viruses and other microbes in water. In particular, chlorination is used to prevent the spread of waterborne diseases such as cholera, dysentery, and typhoid. History In a paper published in 1894, it was formally proposed to add chlorine to water to render it "germ-free". Two other authorities endorsed this proposal and published it in many other papers in 1895. Early attempts at implementing water chlorination at a water treatment plant were made in 1893 in Hamburg, Germany. In 1897 the town of Maidstone, England was the first to have its entire water supply treated with chlorine. Permanent water chlorination began in 1905, when a faulty slow sand filter and a contaminated water supply caused a serious typhoid fever epidemic in Lincoln, England. Alexander Cruickshank Houston used chlorination of the water to stop the epidem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Young Wong Ham Checking Chlorine Level Of Local Water Source In La Paz, Honduras (5421482)
Young may refer to: * Offspring, the product of reproduction of a new organism produced by one or more parents * Youth, the time of life when one's age is low, often meaning the time between childhood and adulthood Music * The Young, an American rock band * ''Young'', an EP by Charlotte Lawrence, 2018 Songs * Young (Baekhyun and Loco song), "Young" (Baekhyun and Loco song), 2018 * Young (The Chainsmokers song), "Young" (The Chainsmokers song), 2017 * Young (Hollywood Undead song), "Young" (Hollywood Undead song), 2009 * Young (Kenny Chesney song), "Young" (Kenny Chesney song), 2002 * Young (Place on Earth song), "Young" (Place on Earth song), 2018 * Young (Tulisa song), "Young" (Tulisa song), 2012 * "Young", by Ella Henderson discography#Singles, Ella Henderson, 2019 * "Young", by Lil Wayne from ''Dedication 6'', 2017 * "Young", by Nickel Creek from ''This Side'', 2002 * "Young", by Sam Smith from ''Love Goes'', 2020 * "Young", by Silkworm from ''Italian Platinum'', 2002 * "Young ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Disinfection
A disinfectant is a chemical substance or compound used to inactivate or destroy microorganisms on inert surfaces. Disinfection does not necessarily kill all microorganisms, especially resistant bacterial spores; it is less effective than sterilization, which is an extreme physical or chemical process that kills all types of life. Disinfectants are generally distinguished from other antimicrobial agents such as antibiotics, which destroy microorganisms within the body, and antiseptics, which destroy microorganisms on living tissue. Disinfectants are also different from biocides—the latter are intended to destroy all forms of life, not just microorganisms. Disinfectants work by destroying the cell wall of microbes or interfering with their metabolism. It is also a form of decontamination, and can be defined as the process whereby physical or chemical methods are used to reduce the amount of pathogenic microorganisms on a surface. Disinfectants can also be used to des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Philadelphia
Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the United States, with a population of 1,603,797 in the 2020 United States census, 2020 census. The city is the urban core of the Philadelphia metropolitan area (sometimes called the Delaware Valley), the nation's Metropolitan statistical area, seventh-largest metropolitan area and ninth-largest combined statistical area with 6.245 million residents and 7.379 million residents, respectively. Philadelphia was founded in 1682 by William Penn, an English Americans, English Quakers, Quaker and advocate of Freedom of religion, religious freedom, and served as the capital of the Colonial history of the United States, colonial era Province of Pennsylvania. It then played a historic and vital role during the American Revolution and American Revolutionary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Drinking Water
Drinking water or potable water is water that is safe for ingestion, either when drunk directly in liquid form or consumed indirectly through food preparation. It is often (but not always) supplied through taps, in which case it is also called tap water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, age, health-related issues, and environmental conditions. This 2004 article focuses on the USA context and uses data collected from the US military. For those who work in a hot climate, up to a day may be required. About 1 to 2 billion people lack safe drinking water. Water can carry vectors of disease and is a major cause of death and illness worldwide. Developing countries are most affected by unsafe drinking water. Sources Potable water is available in almost all populated areas of the world, although it may be expensive, and the supply may not always be sustainable. Sources where drinking water is commo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Reverse Osmosis
Reverse osmosis (RO) is a water purification process that uses a partially permeable membrane, semi-permeable membrane to separate water molecules from other substances. RO applies pressure to overcome osmotic pressure that favors even distributions. RO can remove dissolved or suspended chemical species as well as biological substances (principally bacteria), and is used in industrial processes and the production of potable water. RO retains the solute on the pressurized side of the membrane and the purified solvent passes to the other side. The relative sizes of the various molecules determines what passes through. "Selective" membranes reject large molecules, while accepting smaller molecules (such as solvent molecules, e.g., water). Reverse osmosis is most commonly known for its use in drinking water purification from seawater, removing the salt and other effluent materials from the water molecules. As of 2013 the world's largest RO desalination plant was in Nahal Sorek, So ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Army Medical Department (United States)
The Army Medical Department of the U.S. Army (AMEDD), formerly known as the Army Medical Service (AMS), encompasses the Army's six medical Special Branches (or "Corps"). It was established as the "Army Hospital" in July 1775 to coordinate the medical care required by the Continental Army during the Revolutionary War. The AMEDD is led by the Surgeon General of the U.S. Army, a lieutenant general. The AMEDD is the U.S. Army's healthcare organization (as opposed to an Army Command), and is present in the Active Army, the U.S. Army Reserve, and the Army National Guard components. It is headquartered at Fort Sam Houston, San Antonio, Texas, which hosts the AMEDD Center and School (AMEDDC&S). Large numbers of AMEDD senior leaders can also be found in the Washington D.C. area, divided between the Pentagon and the Walter Reed National Military Medical Center (WRNMMC). The Academy of Health Sciences, within the AMEDDC&S, provides training to the officers and enlisted service mem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
William J
William is a masculine given name of Germanic origin. It became popular in England after the Norman conquest in 1066,All Things William"Meaning & Origin of the Name"/ref> and remained so throughout the Middle Ages and into the modern era. It is sometimes abbreviated "Wm." Shortened familiar versions in English include Will or Wil, Wills, Willy, Willie, Bill, Billie, and Billy. A common Irish form is Liam. Scottish diminutives include Wull, Willie or Wullie (as in Oor Wullie). Female forms include Willa, Willemina, Wilma and Wilhelmina. Etymology William is related to the German given name ''Wilhelm''. Both ultimately descend from Proto-Germanic ''*Wiljahelmaz'', with a direct cognate also in the Old Norse name ''Vilhjalmr'' and a West Germanic borrowing into Medieval Latin ''Willelmus''. The Proto-Germanic name is a compound of *''wiljô'' "will, wish, desire" and *''helmaz'' "helm, helmet".Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Am J Public Health
The ''American Journal of Public Health'' is a monthly peer-reviewed public health journal published by the American Public Health Association that covers health policy and public health. The journal was established in 1911 and its stated mission is "to advance public health research, policy, practice, and education." The journal occasionally publishes themed supplements. The editor-in-chief is Alfredo Morabia. Reception The journal was voted one of the 100 most influential journals in biology and medicine over the last 100 years by the Special Libraries Association. According to the ''Journal Citation Reports'', the journal has a 2021 impact factor of 11.576. Editors in chief Former editors in chief include Mary Northridge (1998-2015), Mervyn Susser (1992–1998), Michel Ibrahim (1990 – 1991), Alfred Yankauer (1975 – 1990), George Rosen (1957–1973), Abel Wolman (1954 – 1957), Charles-Edward A. Winslow (1944 – 1954), Harry Mustard (1941 – 1944), Mazÿck Rave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Army Medical School
The Army Medical School (AMS) was founded by U.S. Army Brigadier General George Miller Sternberg. According to some, it was the world's first school of public health and preventive medicine. (The other institution vying for this distinction is the Johns Hopkins School of Public Health (1916).) The AMS ultimately became the Army Medical Center (1923), then the Walter Reed Army Institute of Research (1953). History Sternberg created the Army Medical School by issuing "General Order 51" on June 24, 1893. The School was housed, along with the Army Medical Library in the building of the Army Medical Museum and Library (affectionately known as the "Old Pickle Factory" or "Old Red") at 7th Street and South B Street (now Independence Avenue), SW, Washington, D.C. (This site is on the National Mall where the Smithsonian's Hirshhorn Museum now stands.) In 1910, the AMS relocated to 721 13th Street, NW and in 1916 to 604 Louisiana Avenue. In 1923, the "Army Medical Center" (AMC) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Carl Rogers Darnall
Brigadier General Carl Rogers Darnall (December 25, 1867, in Weston, Texas – January 18, 1941, in Washington, D.C.) was a United States Army chemist and surgeon credited with originating the technique of liquid chlorination of drinking water. Chlorination has been an exceedingly important innovation in public health, saving innumerable lives. Biography Youth and education Darnall was born on his father's farm in the Cottage Hill community near McKinney, in Collin County, Texas. He was the eldest of the seven children of Reverend Joseph Rogers Darnall, minister of the Christian Church, and Mary Ellen (Thomas) Darnall. He studied at Carlton College, Bonham, Texas, and Transylvania University, Lexington, Kentucky and received a Doctor of Medicine degree from Jefferson Medical College, Philadelphia (1890). In 1892 he married Annie Estella Major of Erwinna, Pennsylvania. In 1896, after a few years of private practice, he was commissioned a first lieutenant and assistan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Indian Medical Service
The Indian Medical Service (IMS) was a military medical service in British India, which also had some civilian functions. It served during the two World Wars, and remained in existence until the independence of India in 1947. Many of its officers, who were both British and Indian, served in civilian hospitals. Among its notable ranks, the IMS had Sir Ronald Ross, a Nobel Prize winner, Sir Benjamin Franklin, later honorary physician to three British monarchs and Henry Vandyke Carter, best known for his illustrations in the anatomy textbook ''Gray's Anatomy''. History The earliest positions for medical officers in the British East India Company (formed as the Association of Merchant Adventurers in 1599 and receiving the royal charter on the last day of 1600) were as ship surgeons. The first three surgeons to have served were John Banester on the ''Leicester'', Lewis Attmer on the ''Edward'' and Rober on the ''Francis''. The first Company fleet went out in 1600 with James Lanca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
George W
George Walker Bush (born July 6, 1946) is an American politician and businessman who was the 43rd president of the United States from 2001 to 2009. A member of the Bush family and the Republican Party (United States), Republican Party, he is the eldest son of the 41st president, George H. W. Bush, and was the 46th governor of Texas from 1995 to 2000. Bush flew warplanes in the Texas Air National Guard in his twenties. After graduating from Harvard Business School in 1975, he worked in the oil industry. He later co-owned the Major League Baseball team Texas Rangers (baseball), Texas Rangers before being elected governor of Texas 1994 Texas gubernatorial election, in 1994. Governorship of George W. Bush, As governor, Bush successfully sponsored legislation for tort reform, increased education funding, set higher standards for schools, and reformed the criminal justice system. He also helped make Texas the Wind power in Texas, leading producer of wind-generated electricity in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
