Your browser does not fully support modern features. Please upgrade for a smoother experience.
Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort by:
Most Viewed Latest Alphabetical (A-Z) Alphabetical (Z-A)
Filter:
All Topic Review Biography Peer Reviewed Entry Video Entry
Topic Review
Neurokinin B
Neurokinin B (NKB) belongs in the family of tachykinin peptides. Neurokinin B is implicated in a variety of human functions and pathways such as the secretion of gonadotropin-releasing hormone. Additionally, NKB is associated with pregnancy in females and maturation in young adults. Reproductive function is highly dependent on levels of both neurokinin B and also the G-protein coupled receptor ligand kisspeptin. The first NKB studies done attempted to resolve why high levels of the peptide may be implicated in pre-eclampsia during pregnancy. NKB, kisspeptin, and dynorphin together are found in the arcuate nucleus (ARC) known as the KNDy subpopulation. This subpopulation is targeted by many steroid hormones and works to form a network that feeds back to GnRH pulse generator.
  • 1.3K
  • 31 Oct 2022
Biography
John Reppy
John D. Reppy (born February 16, 1931) is a physicist who studies the quantum properties of superfluids at Cornell University. He is also a notable rock climber of long standing, who established a number of widely known climbing routes particularly in the northeastern United States. In the 1950s and 60s, Reppy was active on Ragged Mountain in Connecticut where he collaborated on many first as
  • 1.3K
  • 16 Dec 2022
Topic Review
BioSD
The BioSample Database (BioSD) is a database at European Bioinformatics Institute for the information about the biological samples used in sequencing. It stores submitter-supplied metadata about the biological materials from which data stored in the National Center for Biotechnology Information’s (NCBI) primary data archives are derived. NCBI’s archives hosts data pertaining to diverse types of samples from many species, and as such the BioSample database is similarly diverse. Examples of a BioSample include a primary tissue biopsy, an individual organism or an environmental isolate. The BioSample database captures sample metadata in a structured way by encouraging use of controlled sample attribute field name vocabularies. This metadata is key in giving the sample data context, allowing it to be more fully understood, reused, and enables aggregation of disparate data sets. Sample metadata is linked to relevant experimental data across many archival databases relieving submitter burden by enabling one-time submission of sample description. They then can reference that sample, when necessary, when making data deposits to other archives. BioSample records are indexed and searchable, supporting cross-database queries by sample description.
  • 1.2K
  • 02 Dec 2022
Biography
Ludwig Waldmann
Ludwig Waldmann (June 8, 1913 in Fürth – February 9, 1980) was a Germany physicist who specialized in transport phenomena in gases. He derived the Waldmann-Snider equation.[1] Waldmann completed his Ph.D.[2] under Arnold Sommerfeld at the University of Munich in 1938. He was Sommerfeld’s assistant, at the Institute of Theoretical Physics, from 1937 – 1939. Waldman had been the scribe[3
  • 1.2K
  • 15 Dec 2022
Biography
Ian F. Akyildiz
Ian F. Akyildiz (born on April 11, 1954 in Istanbul, Turkey) received his BS, MS, and PhD degrees in Electrical and Computer Engineering from the University of Erlangen-Nürnberg, Germany , in 1978, 1981 and 1984, respectively. Currently, he is the President and CTO of the Truva Inc. since March 1989. He also serves on the Advisory Board of the Technology Innovation Institute (TII) in Abu Dhabi
  • 1.2K
  • 07 Dec 2022
Biography
Martin David Kruskal
Martin David Kruskal (/ˈkrʌskəl/; September 28, 1925 – December 26, 2006)[1] was an American mathematician and physicist. He made fundamental contributions in many areas of mathematics and science, ranging from plasma physics to general relativity and from nonlinear analysis to asymptotic analysis. His single most celebrated contribution was the discovery and theory of solitons.[2] He was
  • 1.2K
  • 17 Nov 2022
Topic Review
Nature’s Role in Outdoor Therapies
Outdoor therapies are intentional therapeutic processes that are (1) place-based, (2) feature active bodily engagement, and (3) recognize nature-human kinship. Significant variety exists in practice, from walk and talk therapy, to expedition-based wilderness therapy, to garden and animal-assisted therapies. These approaches have shown improvement across a wide range of social, emotional, physical, physiological, and psychological outcomes and populations.
  • 1.2K
  • 20 May 2021
Biography
Olaf Lechtenfeld
Olaf Lechtenfeld is a German mathematical physicist, academic and researcher. He is a full professor at the Institute of Theoretical Physics at Leibniz University, where he founded the Riemann Center for Geometry and Physics.[1] Lechtenfeld’s research is focused on string theory, gauge theory and integrable models. He has published over 200 research papers on mathematical physics, classical a
  • 1.2K
  • 30 Dec 2022
Biography
David Dane
David Maurice Surrey Dane, MRCS CRCP MB Bchir MRCP MRCPath FRCPath FRCP (25 March 1923 – 9 April 1998) was a pre-eminent British pathologist and clinical virologist known for his pioneering work in infectious diseases including poliomyelitis and the early investigations into the efficacy of a number of vaccines. He is particularly remembered for his strategic foresight in the field of blood tr
  • 1.2K
  • 09 Dec 2022
Biography
Lina Stern
Lina Solomonovna Stern (or Shtern; Russian: Лина Соломоновна Штерн; 26 August 1878 – 7 March 1968) was a Soviet biochemist, physiologist and humanist whose medical discoveries saved thousands of lives at the fronts of World War II. She is best known for her pioneering work on the blood–brain barrier, which she described as hemato-encephalic barrier in 1921.[1] Born in
  • 1.2K
  • 08 Dec 2022
Biography
Paul Langerhans
Paul Langerhans (25 July 1847 – 20 July 1888) was a Germany pathologist, physiologist and biologist, credited with the discovery of the cells that secrete insulin, named after him as the islets of Langerhans. Islets of Langerhans – Pancreatic cells which produce insulin. Langerhans discovered these cells during his studies for his doctorate at the Berlin Pathological Institute in 1869.[
  • 1.2K
  • 12 Dec 2022
Biography
Richard Gordon
Richard (Dick) Gordon is an United States theoretical biologist. He was born in Brooklyn, New York on Nov 6, 1943, the eldest son of Jack Gordon, a salesman and American handball champion,[1] and artist Diana Gordon. He is married to retired scientist Natalie K Björklund with whom he cowrote his second book and several academic publications. He has three sons, Leland, Bryson and Chason Gordon a
  • 1.2K
  • 13 Dec 2022
Biography
Kenneth W. Ford
Kenneth William Ford (born May 1, 1926) is an United States theoretical physicist, teacher, and writer, currently residing in Philadelphia, Pennsylvania. He was the first chair of the physics department at the University of California, Irvine, and later served as president of the New Mexico Institute of Mining and Technology (New Mexico Tech) and as Executive Director and CEO of the American Ins
  • 1.2K
  • 07 Dec 2022
Biography
Stefan Ślopek
Stefan Ślopek (December 1, 1914 in Skawa near Kraków – 22 August 1995, Wrocław[1] was a Polish scientist specializing in clinical microbiology and immunology. He is the great grandson of Józef Juraszek Ślopek. He is buried in the Grabiszyński Cemetery in Wrocław. After he had completed his secondary education in Tarnopol, he started his medical studies at the Faculty of Medicine in
  • 1.2K
  • 27 Dec 2022
Biography
Letitia Obeng
Letitia Eva Takyibea Obeng (born 10 January 1925) at Anum in the Eastern Region is the first Ghanaian woman to obtain a degree in Zoology and the first to be awarded a doctorate.[1] She is described as "the grandmother of female scientists in Ghana".[2] Letitia Obeng attended a primary school in Abetifi, Kwahu and a middle school in Kyebi. Between 1939 and 1946 she had her secondary school ed
  • 1.2K
  • 27 Dec 2022
Biography
Katrina Spade
Katrina Mogielnicki Spade (born September 9, 1977[1]) is an American designer, entrepreneur, and death care advocate.[2] Spade is the founder of Recompose, a public-benefit corporation developing a natural alternative to conventional cremation and burial. She was awarded the Echoing Green Climate Fellowship in 2014 and the Ashoka Fellowship in 2018 for her work.[3] Spade grew up in rural New
  • 1.2K
  • 16 Dec 2022
Topic Review
Yvelines
Yvelines (/iːvlɪnz/, /iːvlaɪnz/; French: [ivlin] (listen)) is a department in the western part of the Île-de-France region in Northern France. In 2016, it had a population of 1,431,808. Its prefecture is Versailles, home to the Palace of Versailles, the principal residence of the King of France from 1682 until 1789, a UNESCO World Heritage Site since 1979. Yvelines' subprefectures are Saint-Germain-en-Laye, Mantes-la-Jolie and Rambouillet.
  • 1.2K
  • 11 Oct 2022
Topic Review
Redundancy Principle
The redundancy principle in biology expresses the need of many copies of the same entity (cells, molecules, ions) to fulfill a biological function. Examples are numerous: disproportionate numbers of spermatozoa during fertilization compared to one egg, large number of neurotransmitters released during neuronal communication compared to the number of receptors, large numbers of released calcium ions during transient in cells and many more in molecular and cellular transduction or gene activation and cell signaling. This redundancy is particularly relevant when the sites of activation is physically separated from the initial position of the molecular messengers. The redundancy is often generated for the purpose of resolving the time constraint of fast-activating pathways. It can be expressed in terms of the theory of extreme statistics to determine its laws and quantify how shortest paths are selected. The main goal is to estimate these large numbers from physical principles and mathematical derivations. When large distance separate the source and the target (a small activation site), the redundancy principle explains that this geometrical gap can be compensated by large number. Had nature used less copies than normal, activation would have taken a much longer time, as finding a small target by chance is a rare events and falls into narrow escape problems.
  • 1.2K
  • 01 Dec 2022
Biography
Tetiana Starodub
Tetiana Starodub, Ph.D. (Political Sciences), Senior Researcher (born 4 October 1979), is an Ukraine scientist, Associate Professor of International Relations Department, Kyiv Academy for the Humanities, Associate professor of political analytics and forecasting Department of National Academy of Public Administration under the Office of the President of Ukraine. Author of notable scientific arti
  • 1.2K
  • 02 Dec 2022
Topic Review
Genetically Modified Organism Containment and Escape
Since the advent of genetic engineering in the 1970s, concerns have been raised about the dangers of the technology. Laws, regulations, and treaties were created in the years following to contain genetically modified organisms and prevent their escape. Nonentheless, there are several examples of failure to keep GM crops separate from conventional ones.
  • 1.2K
  • 02 Nov 2022
  • Page
  • of
  • 68
Academic Video Service