|
Ernst Hadorn
Ernst Hadorn (May 31, 1902 – April 4, 1976) was a Swiss developmental biologist. He developed techniques for imaginal disc transplantation in '' Drosophila'', leading to the formation of fate maps, and studied the organization of mature discs. He discovered the phenomenon of transdetermination. Hadorn was noted for both his experimental skills and teaching. Hadorn was born in the family of farmers in Forst in Bernese Oberland. Even as a child he was interested in the development of frogs from their eggs each summer. He worked as a teacher in a local village and earned enough money to study biology at the University of Berne under Fritz Baltzer studying nuclear-cytoplasmic interactions. He received a PhD in 1931 and began to teach graduate students. He began to conduct research in his basement on amphibia and with Baltzer's encouragement he applied for a Rockefeller fellowship and went to Rochester University and met Curt Sturn and began to work with '' Drosophila''. He retu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernst Hadorn (1902-1976)
Ernst Hadorn (31 May 1902–4 April 1976) was a Swiss developmental biologist. He developed techniques for imaginal disc transplantation in '' Drosophila'', leading to technique for the production of fate maps, and studied the organization of mature discs. He discovered the phenomenon of transdetermination. Hadorn was noted for both his experimental skills and teaching. Hadorn was born in the family of farmers in Forst in Bernese Oberland. Even as a child he was interested in the development of frogs from their eggs each summer. He worked as a teacher in a local village and earned enough money to study biology at the University of Berne under Fritz Baltzer studying nuclear-cytoplasmic interactions. He received a PhD in 1931 and began to teach graduate students. He began to conduct research in his basement on amphibia and with Baltzer's encouragement he applied for a Rockefeller fellowship and went to University of Rochester and met Curt Sturn and began to work with '' Drosop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Developmental Biology
Developmental biology is the study of the process by which animals and plants grow and develop. Developmental biology also encompasses the biology of Regeneration (biology), regeneration, asexual reproduction, metamorphosis, and the growth and differentiation of stem cells in the adult organism. Perspectives The main processes involved in the embryogenesis, embryonic development of animals are: tissue patterning (via regional specification and patterned cellular differentiation, cell differentiation); tissue growth; and tissue morphogenesis. * Regional specification refers to the processes that create the spatial patterns in a ball or sheet of initially similar cells. This generally involves the action of cytoplasmic determinants, located within parts of the fertilized egg, and of inductive signals emitted from signaling centers in the embryo. The early stages of regional specification do not generate functional differentiated cells, but cell populations committed to developing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imaginal Disc
An imaginal disc is one of the parts of a holometabolous insect larva that will become a portion of the outside of the adult insect during the pupal transformation. Contained within the body of the larva, there are pairs of discs that will form, for instance, the wings or legs or antennae or other structures in the adult. The role of the imaginal disc in insect development was first elucidated by Jan Swammerdam. During the pupal stage, many larval structures are broken down, and adult structures, including the discs, undergo rapid development. Each disc everts and elongates, with the central portion of the disc becoming the distal part of whichever appendage it is forming: the wing, leg, antenna, etc. During the larval stage, the cells in the growing disc appear undifferentiated, but their developmental fate in the adult is already determined. The experiment that demonstrates this developmental commitment is to take an imaginal disc from a third instar larva, about to undergo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drosophila
''Drosophila'' () is a genus of flies, belonging to the family Drosophilidae, whose members are often called "small fruit flies" or (less frequently) pomace flies, vinegar flies, or wine flies, a reference to the characteristic of many species to linger around overripe or rotting fruit. They should not be confused with the Tephritidae, a related family, which are also called fruit flies (sometimes referred to as "true fruit flies"); tephritids feed primarily on unripe or ripe fruit, with many species being regarded as destructive agricultural pests, especially the Mediterranean fruit fly. One species of ''Drosophila'' in particular, ''D. melanogaster'', has been heavily used in research in genetics and is a common model organism in developmental biology. The terms "fruit fly" and "''Drosophila''" are often used synonymously with ''D. melanogaster'' in modern biological literature. The entire genus, however, contains more than 1,500 species and is very diverse in appearance, be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fate Mapping
Fate mapping is a method used in developmental biology to study the embryonic origin of various adult tissues and structures. The "fate" of each cell or group of cells is mapped onto the embryo, showing which parts of the embryo will develop into which tissue. When carried out at single-cell resolution, this process is called cell lineage tracing. It is also used to trace the development of tumors. History The earliest fate maps were based on direct observation of the embryos of ascidians or other marine invertebrates. Modern fate mapping began in 1929 when Walter Vogt marked the groups of cells using a dyed agar chip and tracked them through gastrulation. In 1978, horseradish peroxidase (HRP) was introduced as a marker. HRP was more effective than previous markers, but required embryos to be fixed before viewing. Genetic fate mapping is a technique developed in 1981 which uses a site-specific recombinase to track cell lineage genetically. Today, fate mapping is an important too ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forst, Switzerland
Forst is a village in the canton of Bern, Switzerland. The former municipality of the district of Thun merged with Längenbühl on January 1, 2007 to form Forst-Längenbühl. Geography Forst is a settlement with scattered building in the moraine landscape of Upper Gürbetal. The most important boroughs are Dörfli, Allmid (Allmend), Chromen, Längmoos, and Riedhubel. Of the entire municipal territory of 185 hectares, 79.7% is used for agriculture, 11.8% is forested, and a mere 8% is used for settlements. Politics The Municipal President of Forst is Hans Burkhalter. Transportation Forst is connected to the public transportation grid via Bus Line 51 Thun-Forst-Blumenstein of Verkehrsbetriebe STI Verkehrsbetriebe STI ( Steffisburg- Thun-Interlaken) is a bus operator in the Swiss canton (country subdivision), canton of Bern. It is a private company based in the city of Thun, and operates bus services in that city, as well as routes linking .... References External links * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fritz Baltzer
Fritz originated as a German nickname for Friedrich, or Frederick (''Der Alte Fritz'', and ''Stary Fryc'' were common nicknames for King Frederick II of Prussia and Frederick III, German Emperor) as well as for similar names including Fridolin and, less commonly, Francis. Fritz (Fryc) was also a name given to German troops by the Entente powers equivalent to the derogative Tommy. Other common bases for which the name Fritz was used include the surnames Fritsche, Fritzsche, Fritsch, Frisch(e) and Frycz. Below is a list of notable people with the name "Fritz." Surname *Amanda Fritz (born 1958), retired registered psychiatric nurse and politician from Oregon * Al Fritz (1924–2013), American businessman *Ben Fritz (born 1981), American baseball coach *Betty Jane Fritz (1924–1994), one of the original players in the All-American Girls Professional Baseball League *Clemens Fritz (born 1980), German footballer *Edmund Fritz (before 1918–after 1932), Austrian actor, film directo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rochester University
Rochester University (formerly Rochester College) is a private Christian college in Rochester Hills, Michigan. It was founded by members of the Churches of Christ in 1959. Rochester University is primarily undergraduate (though it offers some graduate programs, such as a Master of Religious Education program) and includes both residential and commuting student populations. It also offers a degree completion program for adult students. History In 1954, members of the Churches of Christ formed a board of trustees to establish an educational institution in the North Central region of the United States. After months of consideration, the board decided to establish a liberal arts college and purchased a country estate in Rochester Hills, Michigan, for a campus site. In September 1959, the college opened as North Central Christian College, retaining that name until 1961. In the years that followed, the institution operated under the name of Michigan Christian College. In 1997, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curt Stern
Curt Stern (August 30, 1902 – October 23, 1981) was a German-born American geneticist. Life Curt Jacob Stern was born into a middle-class Jewish family in Hamburg, Germany on August 30, 1902. He was the first son of Earned S. Stern, born 1862 in England, who was interned during World War I, and Anna Stern, née Anna Liebrecht who was a schoolteacher (b. 1873). Her father C. Liebrecht was a teacher at the Israelitische Gemeindeschule Gleiwitz, a "Gymnasium" in Upper Silesia, with a PhD in mathematics and natural sciences at the University of Breslau. His father dealt in antiques and dental supplies, and his mother was a schoolteacher.A Guide to the Genetics Collections at the APS.http://www.amphilsoc.org/guides/glass/stern.htm access date 1-3-2014 The family moved to a suburb in Berlin shortly after his birth. As a child, he showed a strong interest in biology and natural history. He went to the "Hindenburgschule" in Berlin-Oberschoeneweide. Supported by two high school te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marcel Benoist Prize
The Marcel Benoist Prize, offered by the Marcel Benoist Foundation, is a monetary prize that has been offered annually since 1920 to a scientist of Swiss nationality or residency who has made the most useful scientific discovery. Emphasis is placed on those discoveries affecting human life. Since 1997, candidates in the humanities have also been eligible for the prize. The Marcel Benoist Foundation was established by the will of the French lawyer Marcel Benoist, a wartime resident of Lausanne, who died in 1918. It is managed by a group of trustees comprising the Swiss interior minister and heads of the main Swiss universities. It is often dubbed the "Swiss Nobel Prize." History The first award was given to immunologist Maurice Arthus (1862–1945) at the University of Lausanne. Other winners have included computer scientist Niklaus Wirth, astronomer Michel Mayor, and cardiologist Max Holzmann. , eleven Marcel Benoist winners have later also won the Nobel Prize: Paul Karre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wohlen Bei Bern
Wohlen bei Bern is a municipality in the Bern-Mittelland administrative district in the canton of Bern in Switzerland. History Wohlen bei Bern is first mentioned in 1275 as ''Wolun''. There were several prehistoric settlements near Wohlen. The earliest evidence includes several neolithic stone axes, Bronze Age axes and Hallstatt and La Tene burial mounds. During the Roman era a settlement spread across much of the current municipality. Based on the similar bricks and tiles, it appears that there was a brick works in the area. A Roman graveyard has been discovered at Uettligen with about 30-40 burials and 1st or 2nd century pottery. The next trace of a settlement is a 7th-century graveyard in Hinterkappelen. During the High Middle Ages there were wooden castles at Ballmoos, Sandbühl, Heugraben and Aspitanne, which were probably fiefs of the court at Oltigen. Between 1410 and 1412 the entire bailiwick of Oltigen was acquired by Bern. Bern controlled the low courts at Säriswi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Ernst Hadorn")
