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Pichia Uvarum
''Pichia'' (''Hansenula'' and ''Hyphopichia'' are obsolete synonyms) is a genus of yeasts in the family Pichiaceae with spherical, elliptical, or oblong acuminate cells. ''Pichia'' is a teleomorph, and forms hat-shaped, hemispherical, or round ascospores during sexual reproduction. The anamorphs of some ''Pichia'' species are '' Candida'' species. The asexual reproduction is by multilateral budding. The genus name of ''Pichia'' is in honour of Pico Pichi (1862-1933), who was an Italian botanist and Professor of natural history and plant pathology at a viticulture school in the town of Conegliano in the Province of Treviso. The genus was circumscribed by Emil Christian Hansen in Centralbl. Bakteriol., 2. Abt., 12 on pages 533-538 in 1904. Lactose is neither fermented nor assimilated by these species. The behaviour with regard to other carbohydrates is dependent on the different species. Nitrate is always assimilated. More than 100 species of this genus are known. GBIF lists 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emil Christian Hansen
Emil Christian Hansen (8 May 1842 – 27 August 1909) was a Danish mycologist and fermentation physiologist. Born in Ribe, he financed his education by writing novels. He was awarded a gold medal in 1876 for an essay on fungi, titled ''De danske Gjødningssvampe''. During his days as a university student in Copenhagen, he worked as an unpaid assistant to zoologist Japetus Steenstrup (1813–1897). In 1876, with Alfred Jørgensen (1848–1925), he published a Danish translation of Charles Darwin’s " The Voyage of the Beagle"; ''Rejse om Jorden''. From 1879 to 1909, he was director of the physiological department at Carlsberg Laboratory. Hired by the Carlsberg Laboratory in Copenhagen in 1879, he became the first to isolate a pure cell of yeast in 1883, and after combining it with a sugary solution, produced more yeast than was in a yeast bank. It was named as ''Saccharomyces carlsbergensis'' after the laboratory, and is the yeast from which are derived, all yeasts used in l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ogataea
''Ogataea'' is a genus of ascomycetous yeasts in the family Saccharomycetaceae. It was separated from the former genus '' Hansenula'' via an examination of their 18S and 26S rRNA partial base sequencings by Yamada et al. 1994.Y. Yamada, K. Maeda, K. Mikata: ''The phylogenetic relationships of the hat-shaped ascospore-forming, nitrate-assimilating Pichia species, formerly classified in the genus Hansenula Sydow et Sydow, based on the partial sequences of 18S and 26S ribosomal RNAs (Saccharomycetaceae): the proposal of three new genera, Ogataea, Kuraishia, and Nakazawaea.'' Bioscience, Biotechnology, and Biochemistry 58, 1994, 1245–1257. . The genus name of ''Ogataea'' is in honour of Koichi Ogata (x - 1977), who was a Japanese microbiologist from the Department of Agricultural Chemistry, Faculty of Agriculture, at Kyoto University. It was stated in the journal; "The genus is named in honor of the late Professor Dr. Koichi Ogata, Department of Agricultural Chemistry, Faculty of Agr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pichia Ohmeri
''Pichia'' (''Hansenula'' and ''Hyphopichia'' are obsolete synonyms) is a genus of yeasts in the family Pichiaceae with spherical, elliptical, or oblong acuminate cells. ''Pichia'' is a teleomorph, and forms hat-shaped, hemispherical, or round ascospores during sexual reproduction. The anamorphs of some ''Pichia'' species are '' Candida'' species. The asexual reproduction is by multilateral budding. The genus name of ''Pichia'' is in honour of Pico Pichi (1862-1933), who was an Italian botanist and Professor of natural history and plant pathology at a viticulture school in the town of Conegliano in the Province of Treviso. The genus was circumscribed by Emil Christian Hansen in Centralbl. Bakteriol., 2. Abt., 12 on pages 533-538 in 1904. Lactose is neither fermented nor assimilated by these species. The behaviour with regard to other carbohydrates is dependent on the different species. Nitrate is always assimilated. More than 100 species of this genus are known. GBIF lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peroxisome
A peroxisome () is a membrane-bound organelle, a type of microbody, found in the cytoplasm of virtually all eukaryotic cells. Peroxisomes are oxidative organelles. Frequently, molecular oxygen serves as a co-substrate, from which hydrogen peroxide (H2O2) is then formed. Peroxisomes owe their name to hydrogen peroxide generating and scavenging activities. They perform key roles in lipid metabolism and the conversion of reactive oxygen species. Peroxisomes are involved in the catabolism of very long chain fatty acids, branched chain fatty acids, bile acid intermediates (in the liver), D-amino acids, and polyamines, the reduction of reactive oxygen species – specifically hydrogen peroxide – and the biosynthesis of plasmalogens, i.e., ether phospholipids critical for the normal function of mammalian brains and lungs. They also contain approximately 10% of the total activity of two enzymes ( Glucose-6-phosphate dehydrogenase and 6-Phosphogluconate dehydrogenase) in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hansenula Polymorpha
''Ogataea polymorpha'' is a methylotrophic yeast with unusual characteristics. It is used as a protein factory for pharmaceuticals. ''Ogataea polymorpha'' belongs to a limited number of methylotrophic yeast species – yeasts that can grow on methanol. The range of methylotrophic yeasts includes ''Candida boidinii'', ''Pichia methanolica'', ''Pichia pastoris'' and ''Ogataea polymorpha''. ''O. polymorpha'' is taxonomically a species of the family Saccharomycetaceae. Strains Three ''O. polymorpha'' strains, identified in the 1950s, are known. They have unclear relationships and are of independent origins. They are found in soil samples, the gut of insects or in spoiled concentrated orange juice. They exhibit different features and are used in basic research and to recombinant protein production: *strain CBS4732 (CCY38-22-2; ATCC34438, NRRL-Y-5445) *strain DL-1 (NRRL-Y-7560; ATCC26012) *strain NCYC495 (CBS1976; ATAA14754, NRLL-Y-1798) Strains CBS4732 and NCYY495 can be mated wher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pichia Pastoris
''Pichia pastoris'' is a species of methylotrophic yeast. It was found in the 1960s, with its feature of using methanol as a source of carbon and energy. After years of study, ''P. pastoris'' was widely used in biochemical research and biotech industries. With strong potential for being an expression system for protein production, as well as being a model organism for genetic study, ''P. pastoris'' has become important for biological research and biotech applications. In the last decade, some reports reassigned ''P. pastoris'' to the genus '' Komagataella'' with phylogenetic analysis, by genome sequencing of ''P. pastoris''. The genus was split into ''K. phaffii'', ''K. pastoris'', and ''K. pseudopastoris''. ''P. pastoris'' in nature Natural habitat In nature, ''P. pastoris'' is found on trees, such as chestnut trees. They are heterotrophs and they can use several carbon sources for living, like glucose, glycerol and methanol. However, they cannot use lactose. Reproduction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agricultural Research Service
The Agricultural Research Service (ARS) is the principal in-house research agency of the United States Department of Agriculture (USDA). ARS is one of four agencies in USDA's Research, Education and Economics mission area. ARS is charged with extending the nation's scientific knowledge and solving agricultural problems through its four national program areas: nutrition, food safety and quality; animal production and protection; natural resources and sustainable agricultural systems; and crop production and protection. ARS research focuses on solving problems affecting Americans every day. The ARS Headquarters is located in the Jamie L. Whitten Building on Independence Avenue in Washington, D.C. and the headquarters staff is located at the George Washington Carver Center (GWCC) in Beltsville, Maryland. For 2018, its budget was $1.2 billion. Mission ARS conducts scientific research for the American public. Their main focus is on research to develop solutions to agricultural pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aflatoxins
Aflatoxins are various poisonous carcinogens and mutagens that are produced by certain molds, particularly ''Aspergillus'' species. The fungi grow in soil, decaying vegetation and various staple foodstuffs and commodities such as hay, sweetcorn, wheat, millet, sorghum, cassava, rice, chili peppers, cottonseed, peanuts, tree nuts, sesame seeds, sunflower seeds, and various spices. In short, the relevant fungi grow on almost any crop or food. When such contaminated food is processed or consumed, the aflatoxins enter the general food supply. They have been found in both pet and human foods, as well as in feedstocks for agricultural animals. Animals fed contaminated food can pass aflatoxin transformation products into eggs, milk products, and meat. For example, contaminated poultry feed is the suspected source of aflatoxin-contaminated chicken meat and eggs in Pakistan. Children are particularly affected by aflatoxin exposure, which is associated with stunted growth, delayed de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspergillus Flavus
''Aspergillus flavus'' is a saprotrophic and pathogenic fungus with a cosmopolitan distribution. It is best known for its colonization of cereal grains, legumes, and tree nuts. Postharvest rot typically develops during harvest, storage, and/or transit. Its specific name ''flavus'' derives from the Latin meaning yellow, a reference to the frequently observed colour of the spores. ''A. flavus'' infections can occur while hosts are still in the field (preharvest), but often show no symptoms ( dormancy) until postharvest storage or transport. In addition to causing preharvest and postharvest infections, many strains produce significant quantities of toxic compounds known as mycotoxins, which, when consumed, are toxic to mammals. ''A. flavus'' is also an opportunistic human and animal pathogen, causing aspergillosis in immunocompromised individuals. Hosts ''Aspergillus flavus'' is found globally as a saprophyte in soils and causes disease on many important agriculture crops. Com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pichia Anomala
''Pichia anomala'' is a species of ascomycete and teleomorphic fungi of the genus '' Pichia''. It is used as a preventive (biocontrol agent) for undesirable fungi or mold, nevertheless it may spoil food in large quantities. It is used in wine making, airtight stored grain (preventing ''Aspergillus flavus'' aflatoxins), apples, and grapevines. ''P. anomala'' has been reclassified as ''Wickerhamomyces anomalus''. Features Distinguished from some other species of ''Pichia'' by high osmotolerance, ''P. anomala'' ferments sucrose, and assimilates raffinose. Does not exhibit crabtree effect but rather Pasteur effect. Products * ethanol under anaerobiosis * acetate under respiratory and respirofermentative growth. * ethyl acetate from glucose under oxygen limitation, also other small volatiles, e.g., ethyl propanoate, phenyl ethanol, and 2-phenylethyl acetate. * glycerol, arabinitol, and trehalose Trehalose (from Turkish '' tıgala'' – a sugar derived from insect cocoon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbiosis
Symbiosis (from Greek , , "living together", from , , "together", and , bíōsis, "living") is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic. The organisms, each termed a symbiont, must be of different species. In 1879, Heinrich Anton de Bary defined it as "the living together of unlike organisms". The term was subject to a century-long debate about whether it should specifically denote mutualism, as in lichens. Biologists have now abandoned that restriction. Symbiosis can be obligatory, which means that one or more of the symbionts depend on each other for survival, or facultative (optional), when they can generally live independently. Symbiosis is also classified by physical attachment. When symbionts form a single body it is called conjunctive symbiosis, while all other arrangements are called disjunctive symbiosis."symbiosis." Dorland's Illustrated Medical Diction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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