Summary

HandWiki is the world's largest wiki-style encyclopedia dedicated to science, technology and computing. It allows you to create and edit articles as long as you have external citations and login account. In addition, this is a content management environment that can be used for collaborative editing of original scholarly content, such as books, manuals, monographs and tutorials.

Expand All
Entries
Topic Review
Red Algae
Red algae, or Rhodophyta (/roʊˈdɒfɪtə/, /ˌroʊdəˈfaɪtə/; from grc ῥόδον (rhódon) 'rose', and φυτόν (phutón) 'plant'), are one of the oldest groups of eukaryotic algae. The Rhodophyta also comprises one of the largest phyla of algae, containing over 7,000 currently recognized species with taxonomic revisions ongoing. The majority of species (6,793) are found in the Florideophyceae (class), and mostly consist of multicellular, marine algae, including many notable seaweeds. Red algae are abundant in marine habitats but relatively rare in freshwaters. Approximately 5% of red algae species occur in freshwater, environments with greater concentrations found in warmer areas. Except for two coastal cave dwelling species in the asexual class Cyanidiophyceae, there are no terrestrial species, which may be due to an evolutionary bottleneck in which the last common ancestor lost about 25% of its core genes and much of its evolutionary plasticity. The red algae form a distinct group characterized by having eukaryotic cells without flagella and centrioles, chloroplasts that lack external endoplasmic reticulum and contain unstacked (stroma) thylakoids, and use phycobiliproteins as accessory pigments, which give them their red color. Red algae store sugars as floridean starch, which is a type of starch that consists of highly branched amylopectin without amylose, as food reserves outside their plastids. Most red algae are also multicellular, macroscopic, marine, and reproduce sexually. The red algal life history is typically an alternation of generations that may have three generations rather than two. The coralline algae, which secrete calcium carbonate and play a major role in building coral reefs, belong here. Red algae such as dulse (Palmaria palmata) and laver (nori/gim) are a traditional part of European and Asian cuisines and are used to make other products such as agar, carrageenans and other food additives.
  • 11.0K
  • 11 Nov 2022
Biography
Mahmood Amiry-Moghaddam
Mahmood Amiry-Moghaddam, (born 21 April 1971) is a Norwegian-Iranian neuroscientist and human rights advocate. Amiry-Moghaddam spent his first few years in the city of Kerman about 1000 kilometers south-east of Tehran in Iran. He arrived in Norway as a refugee of minor age, via Pakistan in 1985. Amiry-Moghaddam completed his medical studies in 1996 at the University of Oslo, and later obtain
  • 1.6K
  • 15 Nov 2022
Biography
Eliezer Yudkowsky
Eliezer Shlomo Yudkowsky (born September 11, 1979) is an American AI researcher and writer best known for popularising the idea of friendly artificial intelligence.[1][2] He is a co-founder[3] and research fellow at the Machine Intelligence Research Institute (MIRI), a private research nonprofit based in Berkeley, California.[4] He has no formal secondary education, never having attended high sc
  • 10.4K
  • 03 Mar 2023
Biography
George Robert Carruthers
George Robert Carruthers (born October 1, 1939) is an award-winning African-American inventor, physicist, and space scientist. Carruthers invented the ultraviolet camera/spectograph for NASA to use when it launched Apollo 16 in 1972. His work also demonstrated that molecular hydrogen exists in the interstellar medium. In 2003, Carruthers was inducted into the National Inventor's Hall of Fame. He
  • 2.6K
  • 15 Nov 2022
Biography
John S. Casement
John Stephen "Jack" Casement (January 19, 1829 – December 13, 1909) was a general and brigade commander in the Union Army during the American Civil War and a noted railroad contractor. He directed the construction of the Union Pacific's section of the Transcontinental Railroad, which linked the Western United States with the East. John S. Casement was born in Geneva, New York. He worked as
  • 1.6K
  • 15 Nov 2022
Biography
Noe Itō
Noe Itō (伊藤 野枝, Itō Noe, January 21, 1895 – September 16, 1923) was a Japanese anarchist, social critic, author and feminist. Itō was born on the island of Kyushu near Fukuoka, Japan on January 21, 1895.[1] At 14 she went to work for the post office; the next year she moved to Tokyo to enter the Ueno Girls' High School. In the summer of her fifth year at Ueno, Ito's uncle arrang
  • 1.5K
  • 15 Nov 2022
Biography
John Niemeyer Findlay
John Niemeyer Findlay (25 November 1903 – 27 September 1987), usually cited as J. N. Findlay, was a South African philosopher. After reading classics and philosophy as a boy and at the University of Pretoria, Findlay received a Rhodes scholarship to Balliol College, Oxford for the years 1924–1926. He completed Oxford's classics course (also known as "Greats") in June 1926, and stayed on
  • 1.5K
  • 15 Nov 2022
Biography
D. Allan Bromley
David Allan Bromley (May 4, 1926 – February 10, 2005) was a Canadian-American physicist, academic administrator and Science Advisor to American president George H. W. Bush.[1] His field of research was the study of low-energy nuclear reactions and structure using heavy ion beams. Born in Westmeath, Ontario, Canada, he received a Bachelor of Science in 1949 and a Master of Science in 1950 fr
  • 965
  • 15 Nov 2022
Biography
Ching W. Tang
Ching W. Tang (Chinese: 鄧青雲; pinyin: Dèng Qīngyún) is a Hong Kong-born American physical chemist. He was born in Yuen Long, Hong Kong in 1947. Tang currently is the Doris Johns Cherry Professor in the Chemical Engineering Department, University of Rochester.[1] He also has joint appointments in the Department of Chemistry and the Department of Physics and Astronomy. Tang has joined HKUS
  • 2.3K
  • 15 Nov 2022
Biography
Charles H. Holbrow
Charles H. Holbrow (born September 23, 1935) is an American physicist. Charles Howard Holbrow was born in Melrose, Massachusetts to parents Frederick Holbrow and Florence Louisa (Gile) Holbrow.[1] His earliest memory of interest in physics dates from about age 13, when he saved the money he earned delivering newspapers to buy a book by Robert Andrews Millikan, Electrons (+And -) Protons Photo
  • 1.0K
  • 15 Nov 2022
  • Page
  • of
  • 863

Other Entry Collections

>>