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Sapotilla
''Manilkara huberi'', also known as masaranduba, níspero, and sapotilla, is a fruit bearing plant of the genus ''Manilkara'' of the family Sapotaceae. Geographical distribution ''Manilkara huberi'' is native to large parts of northern South America, Central America and the Antilles, at elevations below above sea level. Description ''Manilkara huberi'' is a large tree, reaching heights of . The leaves are oblong, approximately in length, with yellow undersides. The flowers are hermaphroditic; white with 3 sepals. The edible fruit is yellow and ovoid, in diameter, containing one seed (or occasionally two). Uses The fruit of the ''M. huberi'' is similar to the sapodilla and is edible, with excellent flavor and is popular for use in desserts. Etymologically speaking, "Sapodilla" derives from the Nahuatl word "tzapotl" which refers to any sweet fruit with a soft flesh. Hence many species of ''Manilkara'' may be colloquially called "sapote" or "sapodilla" and indeed a number o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adolpho Ducke
Adolpho Ducke (October 19, 1876 – January 5, 1959), (also referred to as Adolfo Ducke and occasionally misspelled "Duque"), was a notable entomologist, botanist and ethnographer specializing in Amazonia. According to family records, he was an ethnic German with roots in Trieste Austro-Hungary (now in Italy). German was his first language; that is, the German commonly spoken in Trieste in the 19th century. Most of his books were written in German. Recruited by Emílio Goeldi, Ducke began his work in Amazônia as an entomologist for the Museu Paraense Emílio Goeldi, but due to the influence of botanists Jacques Hüber and Paul Le Cointe, he switched to botany. He traveled throughout Amazônia to study the complicated tree system of the rainforest. He published 180 articles and monographs, primarily on the Leguminosae, and he described 900 species and 50 new genera. In 1918, while continuing his work for the Paraense Museum, he collaborated with the Rio de Janeiro Bot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hevea Brasiliensis
''Hevea brasiliensis'', the Pará rubber tree, ''sharinga'' tree, seringueira, or most commonly, rubber tree or rubber plant, is a flowering plant belonging to the spurge family, Euphorbiaceae, originally native to the Amazon basin, but is now pantropical in distribution due to introductions. It is the most economically important member of the genus ''Hevea'' because the milky latex extracted from the tree is the primary source of natural rubber. Description ''Hevea brasiliensis'' is a tall deciduous tree growing to a height of up to in the wild. Cultivated trees are usually much smaller because drawing off the latex restricts their growth. The trunk is cylindrical and may have a swollen, bottle-shaped base. The bark is some shade of brown, and the inner bark oozes latex when damaged. The leaves have three leaflets and are spirally arranged. The inflorescences include separate male and female flowers. The flowers are pungent, creamy-yellow and have no petals. The fruit is a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marcel Marie Maurice Dubard
Marcel may refer to: People * Marcel (given name), people with the given name Marcel * Marcel (footballer, born August 1981), Marcel Silva Andrade, Brazilian midfielder * Marcel (footballer, born November 1981), Marcel Augusto Ortolan, Brazilian striker * Marcel (footballer, born 1983), Marcel Silva Cardoso, Brazilian left back * Marcel (footballer, born 1992), Marcel Henrique Garcia Alves Pereira, Brazilian midfielder * Marcel (singer), American country music singer * Étienne Marcel (died 1358), provost of merchants of Paris * Gabriel Marcel (1889–1973), French philosopher, Christian existentialist and playwright * Jean Marcel (died 1980), Madagascan Anglican bishop * Jean-Jacques Marcel (1931–2014), French football player * Rosie Marcel (born 1977), English actor * Sylvain Marcel (born 1974), Canadian actor * Terry Marcel (born 1942), British film director * Claude Marcel (1793-1876), French diplomat and applied linguist Other uses * Marcel (''Friends''), a fictiona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
August Grisebach
August Heinrich Rudolf Grisebach (; 17 April 18149 May 1879) was a German botanist and phytogeographer. Biography Grisebach studied at the Lyceum in Hanover, the cloister-school at Ilfeld, and the University of Göttingen. He graduated in medicine from the University of Berlin in 1836. He undertook expeditions to Provence, Turkey, the Balkans, and Norway. In 1837 he became associate professor and in 1847 full professor at the medical faculty in Göttingen and was named director of the botanical garden there in 1875. While his main fields of interest were phytogeography and systematics, especially the Gentianaceae and Malpighiaceae, he considered his ''Flora of the British West Indian Islands'' his most important work. Much of his collection, especially the types of species described by him, are housed at the Göttingen University Herbarium. His taxonomic classification is set out in his ''Grundriss der systematischen Botanik'' (1854). His son Eduard was an author, lawyer a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Wright (botanist)
Charles Wright (October 29, 1811 – August 11, 1885) was an American botanist. History Wright was born in Wethersfield, Connecticut,Mary Gunn and L. E. W. Codd the son of James Wright and Mary née Goodrich. He studied classics and mathematics at Yale, and in October 1835 moved to Natchez, Mississippi to tutor a plantation owner's family. His employer's business failed two years later, and he moved to Texas, working as a land surveyor and teacher. He surveyed ground for the Pacific Railroad Company.Bo Beolens, Michael Watkins and Michael Grayson During this time, he also collected plants for Asa Gray. Gray thought of Wright as one of his most trusted collectors.Carolyn Dodson In 1849, he joined an army expedition (with Gray's help) through Texas, botanising from Galveston to San Antonio and then on to El Paso. But he had to walk most of the 673 miles, (which took over 104 days effort).Dan Lewis Fische He collected seeds of '' Penstemon baccharifolius'' (Hook), between Texas a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Gravity
Relative density, also called specific gravity, is a dimensionless quantity defined as the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for solids and liquids is nearly always measured with respect to water at its densest (at ); for gases, the reference is air at room temperature (). The term "relative density" (abbreviated r.d. or RD) is preferred in SI, whereas the term "specific gravity" is gradually being abandoned. If a substance's relative density is less than 1 then it is less dense than the reference; if greater than 1 then it is denser than the reference. If the relative density is exactly 1 then the densities are equal; that is, equal volumes of the two substances have the same mass. If the reference material is water, then a substance with a relative density (or specific gravity) less than 1 will float in water. For example, an ice cube, with a relative density of about 0.91, will float. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puerto Rico
; abbreviated PR), officially the Commonwealth of Puerto Rico, is a Government of Puerto Rico, self-governing Caribbean Geography of Puerto Rico, archipelago and island organized as an Territories of the United States, unincorporated territory of the United States under the designation of Commonwealth (U.S. insular area), commonwealth. Located about southeast of Miami, Miami, Florida between the Dominican Republic in the Greater Antilles and the United States Virgin Islands, U.S. Virgin Islands in the Lesser Antilles, it consists of the eponymous main island and numerous smaller islands, including Vieques, Puerto Rico, Vieques, Culebra, Puerto Rico, Culebra, and Isla de Mona, Mona. With approximately 3.2 million Puerto Ricans, residents, it is divided into Municipalities of Puerto Rico, 78 municipalities, of which the most populous is the Capital city, capital municipality of San Juan, Puerto Rico, San Juan, followed by those within the San Juan–Bayamón–Caguas metro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lumber
Lumber is wood that has been processed into uniform and useful sizes (dimensional lumber), including beams and planks or boards. Lumber is mainly used for construction framing, as well as finishing (floors, wall panels, window frames). Lumber has many uses beyond home building. Lumber is referred to as timber in the United Kingdom, Australia, and New Zealand, while in other parts of the world, including the United States and Canada, the term ''timber'' refers specifically to unprocessed wood fiber, such as cut logs or standing trees that have yet to be cut. Lumber may be supplied either rough- sawn, or surfaced on one or more of its faces. ''Rough lumber'' is the raw material for furniture-making, and manufacture of other items requiring cutting and shaping. It is available in many species, including hardwoods and softwoods, such as white pine and red pine, because of their low cost. ''Finished lumber'' is supplied in standard sizes, mostly for the construction ind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methacrylic Acid
Methacrylic acid, abbreviated MAA, is an organic compound with the formula CH2=C(CH3)CO2H. This colorless, viscous liquid is a carboxylic acid with an acrid unpleasant odor. It is soluble in warm water and miscible with most organic solvents. Methacrylic acid is produced industrially on a large scale as a precursor to its esters, especially methyl methacrylate (MMA), and to poly(methyl methacrylate) (PMMA). Production In the most common route, methacrylic acid is prepared from acetone cyanohydrin, which is converted to methacrylamide sulfate using sulfuric acid. This derivative in turn is hydrolyzed to methacrylic acid, or esterified to methyl methacrylate in one step. Another route to methacrylic acid starts with isobutylene, which obtainable by dehydration of ''tert''-butanol. Isobutylene is oxidized sequentially to methacrolein and then methacrylic acid. Methacrolein for this purpose can also be obtained from formaldehyde and ethylene. Yet a third route involves the dehy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyurethane Urea Elastomer
The polyurethane urea elastomer (PUU), or poly (urethane urea) elastomer, is a flexible polymeric material that is composed of linkages made out of polyurethane and polyurea compounds. Due to its hyperelastic properties, it is capable of bouncing back high-speed ballistic projectiles as if the material had “hardened” upon impact. PUUs were developed by researchers from the U.S. Army Research Laboratory (ARL) and the Army’s Institute for Soldier Nanotechnology at the Massachusetts Institute of Technology (MIT) to potentially replace polyethylene materials in body armor and other protective gear, such as combat helmets, face shields, and ballistic vests. Composition In general, PUUs are composed of both hard and soft segments that each play a role in the material’s physical properties. The soft segments consist of two types of chemical compounds, long-chain polyols and diisocyanates, that react and connect together with urethane linkages. On the other hand, the short-cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golf Ball
A golf ball is a ball designed to be used in golf. Under the rules of golf, a golf ball has a mass no more than , has a diameter not less than , and performs within specified velocity, distance, and symmetry limits. Like golf clubs, golf balls are subject to testing and approval by The R&A (formerly part of the Royal and Ancient Golf Club of St Andrews) and the United States Golf Association, and those that do not conform with regulations may not be used in competitions ''(Rule 5–1)''. History Early balls It is commonly believed that hard wooden, round balls, made from hardwoods such as beech and box, were used for golf from the 14th through the 17th centuries. Though wooden balls were no doubt used for other similar contemporary stick and ball games, there is no definite evidence that they were actually used in golf in Scotland. It is equally likely, if not more so, that leather balls filled with cows' hair were used, imported from the Netherlands from at least 1486 onwar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gutta-percha
Gutta-percha is a tree of the genus ''Palaquium'' in the family Sapotaceae, which is primarily used to create a high-quality latex of the same name. The material is rigid, naturally biologically Chemically inert, inert, resilient, electrically nonconductor, nonconductive, and thermoplastic, most commonly sourced from ''Palaquium gutta''; it is a polymer of isoprene which forms a rubber-like elastomer. The word "gutta-percha" comes from the plant's name in Malay language, Malay: translates as 'sticky gum' and () is the name of a less-sought-after gutta tree. The western term therefore is likely a derivative amalgamation of the original native names. Description ''Palaquium gutta'' trees are tall and up to in trunk diameter. The leaves are evergreen, alternate or spirally arranged, simple, entire, long, glossy green above, and often yellow or glaucous below. The flowers are produced in small clusters along the stems, each flower with a white corolla (flower), corolla with f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
