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Pseudis Paradoxa
''Pseudis paradoxa'', known as the paradoxical frog or shrinking frog, is a species of hylid frog from South America. Its name refers to the very large—up to long—tadpole (the world's longest), which in turn "shrinks" during metamorphosis into an ordinary-sized frog, only about a quarter or third of its former length. Although the recordholder was a tadpole in Amapá that belonged to this species, others in the genus '' Pseudis'' also have large tadpoles and ordinary-sized adults. Distribution and habitat The species inhabits ponds, lakes, lagoons and similar waters from the Amazon and the Guianas, to Venezuela and Trinidad, with a disjunct distribution in the Magdalena River watershed in Colombia and adjacent far western Venezuela. More southerly populations from the Pantanal region to northeastern Argentina have been recognized as a subspecies, but are now often considered a full species, '' P. platensis'', although the validity of this split is questionable. Appearan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudis
''Pseudis'' is a genus of South American frogs (swimming frogs) in the family Hylidae. They are often common and frequently heard, but easily overlooked because of their camouflage and lifestyle, living in lakes, ponds, marshes and similar waters with extensive aquatic vegetation, often sitting at the surface among plants or on floating plants, but rapidly diving if disturbed. Whereas the adults are medium-sized frogs, their tadpoles are large; in some species the world's longest.Franklyn, D. (2015). . The Online Guide to the Animals of Trinidad and Tobago. Retrieved 7 January 2020 Distribution ''Pseudis'' species are distributed throughout tropical and subtropical South America, almost entirely east of the Andes (''P. paradoxa'' is the only species with populations west of the Andes, in Colombia). They are found from Trinidad to northern Argentina, being absent only in Ecuador and Chile, highland regions, and the southernmost part of South America. All species occur in Brazil, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mana, French Guiana
Mana (; ) is a commune and town in French Guiana. It was founded on 16 August 1828 by Sister Anne-Marie Javouhey. It borders the river Mana, from where it gets its name; and is nearby the river Maroni. Mana is the primary producer of rice in French Guiana, which it exports to Suriname. On 31 December 1988, about 3% of the territory of Mana was detached and became the commune of Awala-Yalimapo. Awala-Yalimapo is inhabited by Galibi Amerindians. History The first settlement of people from Jura failed in alcoholism and disease. In 1828, the Ministry of the Navy and Colonies sent Sister Anne-Marie Javouhey to colonize the area. Javouhey set out to build a viable community based on agriculture and invited black traders to settle, which was not the white colony as the Ministry envisioned. When 20 escaped slaves settled in the area, she bought them from their owners. In 1833, Governor visited Mana, and appreciated the efforts and progress. Jubelin arranged for orphans to be s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argentina
Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the List of countries and dependencies by area, eighth-largest country in the world. Argentina shares the bulk of the Southern Cone with Chile to the west, and is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south. Argentina is a Federation, federal state subdivided into twenty-three Provinces of Argentina, provinces, and one autonomous city, which is the federal capital and List of cities in Argentina by population, largest city of the nation, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a Federalism, federal system. Argentina claims sovereignty ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians Of Guyana
Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods, but excluding the amniotes (tetrapods with an amniotic membrane, such as modern reptiles, birds and mammals). All extant (living) amphibians belong to the monophyletic subclass Lissamphibia, with three living orders: Anura (frogs and toads), Urodela (salamanders), and Gymnophiona (caecilians). Evolved to be mostly semiaquatic, amphibians have adapted to inhabit a wide variety of habitats, with most species living in freshwater, wetland or terrestrial ecosystems (such as riparian woodland, fossorial and even arboreal habitats). Their life cycle typically starts out as aquatic larvae with gills known as tadpoles, but some species have developed behavioural adaptations to bypass this. Young amphibians generally undergo metamorphosis from an aquatic larval form with gills to an air-breathing a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frogs Of Brazil
This is a list of the amphibian species recorded in Brazil. The total number of species is 946. Anura Amphignathodontidae *'' Fritziana fissilis'' (Miranda-Ribeiro, 1920) *'' Fritziana goeldii'' (Boulenger, 1895) *'' Fritziana ohausi'' (Wandolleck, 1907) *'' Gastrotheca albolineata'' (Lutz & Lutz, 1939) *'' Gastrotheca fissipes'' (Boulenger, 1888) *'' Gastrotheca microdiscus'' (Andersson in Lönnberg and Andersson, 1910) Aromobatidae *'' Allobates alagoanus'' (Bokermann, 1967) *'' Allobates brunneus'' (Cope, 1887) *'' Allobates caeruleodactylus'' (Lima & Caldwell, 2001) *'' Allobates capixaba'' (Bokermann, 1967) *'' Allobates carioca'' (Bokermann, 1967) *'' Allobates conspicuus'' (Morales, 2002 "2000") *'' Allobates crombiei'' (Morales, 2002 "2000") *'' Allobates femoralis'' (Boulenger, 1884 "1883") *'' Allobates fuscellus'' (Morales, 2002 "2000") *'' Allobates gasconi'' (Morales, 2002 "2000") *'' Allobates goianus'' (Bokermann, 1975) *'' Allobates marchesianus'' (Melin, 194 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians Of Bolivia
Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods, but excluding the amniotes (tetrapods with an amniotic membrane, such as modern reptiles, birds and mammals). All extant (living) amphibians belong to the monophyletic subclass Lissamphibia, with three living orders: Anura (frogs and toads), Urodela (salamanders), and Gymnophiona (caecilians). Evolved to be mostly semiaquatic, amphibians have adapted to inhabit a wide variety of habitats, with most species living in freshwater, wetland or terrestrial ecosystems (such as riparian woodland, fossorial and even arboreal habitats). Their life cycle typically starts out as aquatic larvae with gills known as tadpoles, but some species have developed behavioural adaptations to bypass this. Young amphibians generally undergo metamorphosis from an aquatic larval form with gills to an air-breathing a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type 2 Diabetes
Type 2 diabetes (T2D), formerly known as adult-onset diabetes, is a form of diabetes mellitus that is characterized by high blood sugar, insulin resistance, and relative lack of insulin. Common symptoms include increased thirst, frequent urination, fatigue and unexplained weight loss. Other symptoms include increased hunger, having a sensation of pins and needles, and sores (wounds) that heal slowly. Symptoms often develop slowly. Long-term complications from high blood sugar include heart disease, stroke, diabetic retinopathy, which can result in blindness, kidney failure, and poor blood flow in the lower limbs, which may lead to amputations. A sudden onset of hyperosmolar hyperglycemic state may occur; however, ketoacidosis is uncommon. Type 2 diabetes primarily occurs as a result of obesity and lack of exercise. Some people are genetically more at risk than others. Type 2 diabetes makes up about 90% of cases of diabetes, with the other 10% due primar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toxicity
Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism. Toxicity can refer to the effect on a whole organism, such as an animal, bacteria, bacterium, or plant, as well as the effect on a substructure of the organism, such as a cell (biology), cell (cytotoxicity) or an organ such as the liver (hepatotoxicity). Sometimes the word is more or less synonymous with poison#Poisoning, poisoning in everyday usage. A central concept of toxicology is that the effects of a toxicant are Dose (biochemistry), dose-dependent; even water can lead to water intoxication when taken in too high a dose, whereas for even a very toxic substance such as snake venom there is a dose below which there is no detectable toxic effect. Toxicity is species-specific, making cross-species analysis problematic. Newer paradigms and metrics are evolving to bypass animal testing, while maintaining the concept of toxicity endpoints. Etymology In Ancient G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudin
Pseudin is a peptide derived from ''Pseudis paradoxa''. Pseudins have some antimicrobial function. There are several different forms: * pseudin-1 * pseudin-2 -- has been proposed as a treatment for type 2 diabetes. * pseudin-4 Pseudin-2 Pseudin-2 is the most abundant version of the pseudins found on the skin of the paradoxical frog. The primary sequence reads as GLNALKKVFQGIHEAIKLINNHVQ. Its secondary/tertiary structure consists of one cationic amphipathic α-helix. Antibacterial activity Pseudin-2 was shown to have potent antibacterial activity, but a lower cytotoxicity. The cytotoxicity of a peptide can be measured by its effect on human erythrocytes. It takes a lower concentration of Pseudin-2 to kill bacteria or fungi such as ''E. coli'', '' S. aureus'', and '' C. albicans'' than to kill human erythrocytes. It is hypothesized that Pseudin-2 binding to the cell membrane of the bacteria results in a conformational change in which the peptide forms an α-helical shape, which a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Arab Emirates University
United Arab Emirates University (UAEU) () is a public research university located in Al Ain, United Arab Emirates. Founded in 1976 by the country's first President, Sheikh Zayed bin Sultan Al Nahyan, it is the oldest university in the United Arab Emirates and offers courses in various subjects up to post-graduation. History The United Arab Emirates University was established through the Federal Law No. (4) issued by Sheikh Zayed bin Sultan al-Nahyan, President of the United Arab Emirates on 7 July 1976. Location The university is located in the city of Al Ain, an oasis city in the Abu Dhabi emirate 140 km east of the capital city of Abu Dhabi and a similar distance from the city of Dubai. Students Students come from all seven Emirates and more than 64 other countries. 6,696 students live on campus. In 2014 enrolled international students constituted 25% of the total enrolled students. Rankings The United Arab Emirates University is continuously ranked as the sec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
