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Liebig's Law Of The Minimum
Liebig's law of the minimum, often simply called Liebig's law or the law of the minimum, is a principle developed in agricultural science by Carl Sprengel (1840) and later popularized by Justus von Liebig. It states that growth is dictated not by total resources available, but by the scarcest resource (limiting factor). The law has also been applied to biological populations and ecosystem models for factors such as sunlight or mineral nutrients. Applications This was originally applied to plant or crop growth, where it was found that increasing the amount of plentiful nutrients did not increase plant growth. Only by increasing the amount of the limiting nutrient (the one most scarce in relation to "need") was the growth of a plant or crop improved. This principle can be summed up in the aphorism, "The availability of the most abundant nutrient in the soil is only as good as the availability of the least abundant nutrient in the soil." Or the rough analog, "A chain is only as ...
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Agricultural Science
Agricultural science (or agriscience for short) is a broad multidisciplinary field of biology that encompasses the parts of exact, natural, economic and social sciences that are used in the practice and understanding of agriculture. Professionals of the agricultural science are called agricultural scientists or agriculturists. History In the 18th century, Johann Friedrich Mayer conducted experiments on the use of gypsum (hydrated calcium sulfate) as a fertilizer.John Armstrong, Jesse Buel. ''A Treatise on Agriculture, The Present Condition of the Art Abroad and at Home, and the Theory and Practice of Husbandry. To which is Added, a Dissertation on the Kitchen and Garden.'' 1840. p. 45. In 1843, John Bennet Lawes and Joseph Henry Gilbert began a set of long-term field experiments at Rothamsted Research in England, some of which are still running as of 2018. In the United States, a scientific revolution in agriculture began with the Hatch Act of 1887, which used the ...
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Ceteris Paribus
' (also spelled ') (Classical ) is a Latin phrase, meaning "other things equal"; some other English translations of the phrase are "all other things being equal", "other things held constant", "all else unchanged", and "all else being equal". A statement about a causal, empirical, moral, or logical relation between two states of affairs is ''ceteris paribus'' if it is acknowledged that the statement, although usually accurate in expected conditions, can fail because of, or the relation can be abolished by, intervening factors. chapter 2 A ''ceteris paribus'' assumption is often key to scientific inquiry, because scientists seek to eliminate factors that perturb a relation of interest. Thus epidemiologists, for example, may seek to control independent variables as factors that may influence dependent variables—the outcomes of interest. Likewise, in scientific modeling, simplifying assumptions permit illustration of concepts considered relevant to the inquiry. An example ...
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Robert Bruce Merrifield
Robert Bruce Merrifield (July 15, 1921 – May 14, 2006) was an American biochemist who won the Nobel Prize in Chemistry in 1984 for the invention of solid phase peptide synthesis. Early life He was born in Fort Worth, Texas, on 15 July 1921, the only son of George E. Merrifield and Lorene née Lucas. In 1923 the family moved to California where he attended nine grade schools and two high schools before graduating from Montebello High School in 1939. It was there that he developed an interest both in chemistry and in astronomy. After two years at Pasadena Junior College he transferred to the University of California at Los Angeles (UCLA). After graduation in chemistry he worked for a year at the Philip R. Park Research Foundation taking care of an animal colony and assisting with growth experiments on synthetic amino acid diets. One of these was the experiment by Geiger using the law of the minimum that first demonstrated that the essential amino acids must be present ''simul ...
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Journal Of Nutrition
''The Journal of Nutrition'' (or shortened as '' JN'' or '' J Nutr'') is a peer-reviewed scientific journal published by the American Society for Nutrition. Established in 1928, the journal publishes experimental research on human, animal, cellular and molecular nutrition; biographies and assessments on nutritional researchers; and commentaries on controversial issues in the field. In 2020, its editor-in-chief was Dr. Teresa A. Davis. According to the ''Journal Citation Reports'', ''The Journal of Nutrition'' had an impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 4.281 in 2019—a decline from its 2018 rating of 4.416. References External links * {{Authority control Academic journals established in 1928 Nutrition and dietetics journals Monthly journal ...
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University Of Southern California
The University of Southern California (USC, SC, or Southern Cal) is a Private university, private research university in Los Angeles, California, United States. Founded in 1880 by Robert M. Widney, it is the oldest private research university in California, and has an enrollment of more than 49,000 students. The university is composed of one Liberal arts education, liberal arts school, the University of Southern California academics, Dornsife College of Letters, Arts and Sciences, and 22 Undergraduate education, undergraduate, Graduate school, graduate, and professional schools, enrolling roughly 21,000 undergraduate and 28,500 Postgraduate education, post-graduate students from all fifty U.S. states and more than 115 countries. It is a member of the Association of American Universities, which it joined in 1969. USC sponsors a variety of intercollegiate sports and competes in the National Collegiate Athletic Association (NCAA) and the Big Ten Conference. Members of USC's sports ...
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Diet For A Small Planet
''Diet for a Small Planet'' is a 1971 book by Frances Moore Lappé. It was a bestseller in the West, and argues for the potential role of soy as a superior form of protein. It demonstrates the environmental impact of meat production and a contributor to global food scarcity. She argued for environmental vegetarianism—practising a vegetarian lifestyle out of concerns over animal-based industries and the production of animal-based products. The book has sold over three million copies and was groundbreaking for arguing that world hunger is not caused by a lack of food but by ineffective food policy. In addition to information on meat production and its impact on hunger, the book features simple rules for a healthy diet and hundreds of meat-free recipes. "Its mix of recipes and analysis typified radicals' faith in the ability to combine personal therapy with political activism." Structure * Part I: ''Earth's Labor Lost''—Protein in United States agribusiness * Part II: ''Bringi ...
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Frances Moore Lappé
Frances Moore Lappé (born February 10, 1944) is an American researcher and author in the field of food and democracy policy. She is the author of 20 books including the 2.5-million-copy selling 1971 book '' Diet for a Small Planet'', which the Smithsonian's National Museum of American History describes as "one of the most influential political tracts of the times." She has co-founded three organizations that explore the roots of hunger, poverty, and environmental crises, as well as solutions emerging worldwide through what she calls "living democracy". Her latest work is a report entitled ''Crisis of Trust: How Can Democracies Protect Against Dangerous Lies?'' with Max Boland and Rachel Madison. Recent books by Lappé include ''Daring Democracy: Igniting Power, Meaning, and Connection for the America We Want'', co-authored with Adam Eichen, and ''It’s Not Too Late: Crisis, Opportunity, and the Power of Hope''. In 1987, she was awarded the Right Livelihood Award for "revealing t ...
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Nevin S
Nevin may refer to: Surname * Nevin (surname) Given name Popular Turkish feminine name (from "nevîn" in Persian, meaning "newness"). *Nevin Çokay (1930–2012), Turkish painter * Nevin Yanıt (born 1986), Turkish sprinter *Nevin Halıcı (b. 1941), Turkish culinary culture and food researcher and writer * Nevin Nevlin (b. 1985), Turkish basketball player Nevin is a common surname of Irish/Scottish origins, but is also used as a given name in the Anglosphere. * Nevin Saroya (born 1980), English footballer * Nevin S. Scrimshaw (1918–2013), American food scientist * Nevin Spence (1990–2012), Irish rugby player * Nevin Harrison (born 2002), American sprint canoeist Places *Anglicised name for Nefyn Nefyn (, archaically anglicised as Nevin) is a town and community (Wales), community on the northwest coast of the Llŷn Peninsula, Gwynedd, Wales. Nefyn is popular with visitors for its sandy beach, and has one substantial hotel, a community pu ..., Welsh town * Nevin, Los Angel ...
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Protein Combining
Protein combining or protein complementing is a dietary theory for protein nutrition that purports to optimize the biological value of protein intake. According to the theory, individual vegetarian and vegan foods may provide an insufficient amount of some essential amino acids, making protein combining with multiple complementary foods necessary to obtain a meal with " complete protein". All plant foods contain all 20 amino acids including the 9 essential amino acids in varying amounts, but some may be present in such small amounts that an unrealisticly large amount of the food needs to be consumed to meet requirements. Protein combining was historically promoted as a method of compensating for supposed protein deficiencies in most vegetables as foods (e.g., rice and beans), found in limiting percentages revealed in their respective amino acid profiles. In this dogma of the 1970s, ''each meal'' needs to be combined to form complete proteins. Though it is undisputed that diverse ...
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Protein (nutrient)
Proteins are essential nutrients for the human body. They are one of the constituents of Tissue (biology), body tissue and also serve as a Fuel, fuel source. As fuel, proteins have the same energy density as carbohydrates: 17 Joule, kJ (4 Calories, kcal) per gram. The defining characteristic of protein from a nutritional standpoint is its amino acid composition. Proteins are polymer chains made of amino acids linked by peptide bonds. During human digestion, proteins are broken down in the stomach into smaller polypeptide chains via hydrochloric acid and protease actions. This is crucial for the absorption (small intestine), absorption of the essential amino acids that cannot be biosynthesized by the body. There are nine essential amino acids that humans must obtain from their diet to prevent protein–energy malnutrition, protein-energy malnutrition and resulting death. They are phenylalanine, valine, threonine, tryptophan, methionine, leucine, isoleucine, lysine, and histidin ...
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Vegetarian
Vegetarianism is the practice of abstaining from the Eating, consumption of meat (red meat, poultry, seafood, insects as food, insects, and the flesh of any other animal). It may also include abstaining from eating all by-products of animal slaughter. A person who practices vegetarianism is known as a vegetarian. Vegetarianism may be adopted for various reasons. Many people ethics of eating meat, object to eating meat out of respect for Sentience, sentient animal life. Such ethical motivations have been codified vegetarianism and religion, under various religious beliefs as well as animal rights advocacy. Other motivations for vegetarianism are health-related, political, Environmental vegetarianism, environmental, cultural, aesthetic, Economic vegetarianism, economic, gastronomy, taste-related, or relate to other personality psychology, personal preferences. A small number of towns and cities around the world are exclusively vegetarian or have outlawed meat, including Rishikesh ...
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Journal Of Biological Chemistry
The ''Journal of Biological Chemistry'' (''JBC'') is a weekly peer-reviewed scientific journal that was established in 1905., jbc.org Since 1925, it is published by the American Society for Biochemistry and Molecular Biology. It covers research in areas of biochemistry and molecular biology. The editor is Alex Toker. the journal is fully open access. In press articles are available free on its website immediately after acceptance. Editors The following individuals have served as editors of the journal: * 1906–1909: John Jacob Abel and Christian Archibald Herter * 1909–1910: Christian Archibald Herter * 1910–1914: Alfred Newton Richards * 1914–1925: Donald D. Van Slyke * 1925–1936: Stanley R. Benedict. After Benedict died, John T. Edsall served as temporary editor until the next editor was appointed. * 1937–1958: Rudolph J. Anderson * 1958–1967: John T. Edsall * 1968–1971: William Howard Stein * 1971–2011: Herbert Tabor * 2011–2015: Martha Fedor * ...
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