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Nematologist
Nematology is the scientific discipline concerned with the study of nematodes, or roundworms. Although nematological investigation dates back to the days of Aristotle or even earlier, nematology as an independent discipline has its recognizable beginnings in the mid to late 19th century.Chen, Z. X., Chen, S. Y., and Dickson, D. W. (2004). "A Century of Plant Nematology", pp. 1–42 in ''Nematology Advances and Perspectives'', Vol 1. Tsinghua University Press, Beijing, China.Chitwood, B. G., and Chitwood, M. B. (1950). "An Introduction to Nematology", pp. 1–5 in ''Introduction to Nematology''. University Park Press, Baltimore. History: pre-1850 Nematology research, like most fields of science, has its foundations in observations and the recording of these observations. The earliest written account of a nematode "sighting", as it were, may be found in the Pentateuch of the Old Testament in the Bible, in the Fourth Book of Moses called Numbers: "And the Lord sent fiery serpen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nematode
The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic. Parasitic worms (helminths) are the cause of soil-transmitted helminthiases. They are classified along with arthropods, tardigrades and other moulting animals in the clade Ecdysozoa. Unlike the flatworms, nematodes have a tubular digestive system, with openings at both ends. Like tardigrades, they have a reduced number of Hox genes, but their sister phylum Nematomorpha has kept the ancestral protostome Hox genotype, which shows that the reduction has occurred within the nematode phylum. Nematode species can be difficult to distinguish from one another. Consequently, estimates of the number of nematode species are uncertain. A 2013 survey of animal biodiversity suggested there are over 25,000. Estimates of the total number of extant species are su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diana Wall
Diana Harrison Wall (December 27, 1943 – March 25, 2024) was an American environmental scientist and soil ecologist. She was the founding director of the School of Global Environmental Sustainability, a distinguished biology professor, and senior research scientist at the Natural Resource Ecology Laboratory at Colorado State University. Wall investigated ecosystem processes, soil biodiversity and ecosystem services. Her research focused on the Antarctic McMurdo Dry Valleys and its Wall Valley was named after her. Wall was a globally recognized leader and speaker on life in Antarctica and climate change. Early life and education Diana Wall was born on December 27, 1943, in Durham, North Carolina. Her formative years were spent in Lexington, Kentucky, where she graduated from Lafayette High School. She earned a Bachelor of Arts in biology from the University of Kentucky in 1965. Her interest in nematodes began during her undergraduate studies when she worked on nematode pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michel Luc
Michel Luc (7 February 1927 – 18 January 2010) was a French zoologist (nematologist) and one of the founding fathers of the field of plant-nematology. He spent his career with ORSTOM (''Office de la Recherche Scientifique et Technique Outre-Mer''), now IRD (''Institut de recherche pour le développement''). He created the first French nematology laboratory in the ORSTOM research station of Adiopodoumé, near Abidjan (Ivory Coast) in 1955, and a second nematology lab at Dakar Bel-Air (Senegal) in 1969. In 1978, he launched the ''Revue de Nématologie'' (soon renamed ''Fundamental and Applied Nematology'') that fused with ''Nematologica'' in 1999 to become ''Nematology'', currently the leading nematology journal in the field. He was a world-renowned authority on nematode taxonomy. Biography Michel Luc was born on 7 February 1927 in Tunis (Tunisia). From 1945, on, he studied biology in Paris at the Sorbonne, where he attended classes delivered by biologists such as Georges Mangeno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nathan Cobb
Nathan Augustus Cobb (30 June 1859 – 4 June 1932) is known as "the father of nematology in the United States". He provided the foundations for nematode taxonomy and described over 1000 different nematode species. His technical innovations in nematological methods included fixation and preservation techniques; the Cobb metal mounting slide; improvements in photography and microscopic equipment; and the first device to use flotation to remove nematodes from soil. An individual with a variety of skills, he made significant contributions to a number of scientific disciplines and the USDA Nematology Laboratory, originally established with him as the director, continues today. He was the father of Frjeda Blanchard, the geneticist who first demonstrated Mendelian inheritance in reptiles. Books This list can be accessed via the Biodiversity Heritage Library. The list is incomplete. *"A Nematode formula." (1890) Sydney : C. Potter *"Nematodes, mostly Australian and Fijian." (1893) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maynard Jack Ramsay
Dr. Maynard Jack "Doc" Ramsay (November 22, 1914 – March 20, 2005) was an American entomologist noted for his efforts to track and eradicate exotic parasites carried in flowers, fruits and other cargoes arriving from overseas. He was listed in '' American Men of Science'' and ''Who's Who in America''. During his 36 years in government service, he often was called upon to provide his beetle expertise to the Smithsonian Institution and entomological organizations in the United States and elsewhere. He once provided entomological advice to writer John Steinbeck and found himself quoted on the subject of killer bees in the opening of Arthur Herzog's best-selling novel '' The Swarm''. Work Ramsay was widely known for his research on a potato cyst eelworm — the parasitic golden nematode (''Globodera rostochiensis''). The worm was discovered in 1941 in potato fields on Long Island, New York, the only state where it has established a foothold. Around 1946, the worm was foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gregor W
Gregor is a masculine given name. Notable people and fictional characters with the name include: * Gregor (musician) (1898–1971), Armenian bandleader * Gregor Abel (born 1949), Scottish footballer * Gregor Adlercreutz (1898–1944), Swedish equestrian * Gregor Aichinger (c. 1565–1628), German composer * Gregor Amann (born 1962), German politician * Gregor Arbet (born 1983), Estonian basketball player * Gregor Bailar (born 1963), American businessman * Gregor Bajde (born 1994), Slovenian footballer * Gregor Balažic (born 1988), Slovenian footballer * Gregor Baumgartner (born 1979), Austrian ice hockey player * Gregor Becke (born 1972), Austrian canoer * Gregor Belkovsky (1865–1948), Zionist activist * Gregor Benko (born 1944), American music historian * Gregor Bermbach (born 1981), German bobsledder * Gregor Betz (born 1948), German swimmer * Gregor Bialowas (born 1959), Austrian weightlifter * Gregor Blanco (born 1983), Venezuelan baseball player * Gregor Blatn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1,2-Dibromoethane
1,2-Dibromoethane, also known as ethylene dibromide (EDB), is an organobromine compound with the chemical formula . Although trace amounts occur naturally in the ocean, where it is probably formed by algae and kelp, substantial amounts are produced industrially. It is a dense colorless liquid with a faint, sweet odor, detectable at 10 ppm. It is a widely used and sometimes-controversial fumigant. The combustion of 1,2-dibromoethane produces hydrogen bromide gas that is significantly corrosive. Preparation and use It is produced by the reaction of ethylene gas with bromine, in a classic halogen addition reaction: :CH=CH + Br → BrCH–CHBr Historically, 1,2-dibromoethane was used as a component in anti-knock additives in leaded fuels. It reacts with lead residues to generate volatile lead bromides, thereby preventing fouling of the engine with lead deposits. Pesticide It has been used as a pesticide in soil and on various crops. The applications were initiated after the fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long Island
Long Island is a densely populated continental island in southeastern New York (state), New York state, extending into the Atlantic Ocean. It constitutes a significant share of the New York metropolitan area in both population and land area. The island extends from New York Harbor eastward into the ocean with a maximum north–south width of . With a land area of , it is the List of islands of the United States by area, largest island in the contiguous United States. Long Island is divided among four List of counties in New York, counties, with Brooklyn, Kings (Brooklyn), Queens, and Nassau County, New York, Nassau counties occupying its western third and Suffolk County, New York, Suffolk County its eastern two-thirds. It is an ongoing topic of debate whether or not Brooklyn and Queens are considered part of Long Island. Geographically, both Kings and Queens county are located on the Island, but some argue they are culturally separate from Long Island. Long Island may ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Globodera Rostochiensis
''Globodera rostochiensis'', commonly known as the golden nematode, golden eelworm or yellow potato cyst nematode, is a plant pathogenic nematode. It is a pest of plants in the family Solanaceae, primarily infesting potatoes and tomatoes, as well as a variety of other root crops. Pathology The golden nematode negatively affects plants of the family Solanaceae by forming cysts on the roots of susceptible species. The cysts, which are composed of dead nematodes, are formed to protect the female's eggs and are typically yellow-brown in color. The first symptoms of infestation are typically poor plant growth, chlorosis, and wilting. Heavy infestations can lead to reduced root systems, water stress, and nutrient deficiencies, while indirect effects of an infestation include premature senescence and increased susceptibility to fungal infections. Symptoms of golden nematode infestation are not unique, and thus identification of the pest is usually performed through testing of soil sam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Disulfide
Carbon disulfide (also spelled as carbon disulphide) is an inorganic compound with the chemical formula and structure . It is also considered as the anhydride of thiocarbonic acid. It is a colorless, flammable, neurotoxic liquid that is used as a building block in organic synthesis. Pure carbon disulfide has a pleasant, ether- or chloroform-like odor, but commercial samples are usually yellowish and are typically contaminated with foul-smelling impurities.. History In 1796, the German chemist Wilhelm August Lampadius (1772–1842) first prepared carbon disulfide by heating pyrite with moist charcoal. He called it "liquid sulfur" (''flüssig Schwefel''). The composition of carbon disulfide was finally determined in 1813 by the team of the Swedish chemist Jöns Jacob Berzelius (1779–1848) and the Swiss-British chemist Alexander Marcet (1770–1822). Their analysis was consistent with an empirical formula of CS2. Occurrence, manufacture, properties Small amounts of carbon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fumigation
Fumigation is a method of pest control or the removal of harmful microorganisms by completely filling an area with gaseous pesticides, or fumigants, to suffocate or poison the pests within. It is used to control pests in buildings (structural fumigation), soil, grain, and produce. Fumigation is also used during the processing of goods for import or export to prevent the transfer of exotic organisms. Structural fumigation targets pests inside buildings (usually residences), including pests that inhabit the physical structure itself, such as woodborers and drywood termites. Commodity fumigation, on the other hand, is also to be conducted inside a physical structure, such as a storage unit, but it aims to eliminate pests from infesting physical goods, usually food products, by killing pests within the container which will house them. Each fumigation lasts for a certain duration. This is because after spraying the pesticides, or fumigants, only the pests around are eradicated. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
