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Pecten
Pecten or pectin may refer to: Pecten Biology * Pecten (biology), any comb like structure in animals * ''Pecten'' (bivalve), a genus of scallops * Pecten (company), a subsidiary of Sinopec * Pecten oculi, a structure in the bird retina which contains most of the vasculature Other uses * Pecten, Alberta, Canada * Venus comb murex, after its scientific name ''Murex pecten'' Pectin * Pectin, a plant polysaccharide * Pectineus muscle, a thigh muscle * Pectinoidea, a superfamily of bivalve mollusks which includes Pectinidae ** Pectinidae, a family of bivalve mollusks *** ''Pecten albicans ''Pecten albicans'', common name Japanese baking scallop, is a species of marine bivalve mollusks in the family Pectinidae, the scallops. Description ''Pecten albicans'' has a shell reaching a size of 95 mm, with about 12 radiating ribs. The c ...'', Japanese baking scallop *** '' Pecten excavatus'' *** '' Pecten sulcicostatus'', South African scallop See also * Pectineal line (dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pectinidae
Scallop () is a common name that encompasses various species of marine bivalve mollusks in the taxonomic family Pectinidae, the scallops. However, the common name "scallop" is also sometimes applied to species in other closely related families within the superfamily Pectinoidea, which also includes the thorny oysters. Scallops are a cosmopolitan family of bivalves found in all of the world's oceans, although never in fresh water. They are one of the very few groups of bivalves to be primarily "free-living", with many species capable of rapidly swimming short distances and even migrating some distance across the ocean floor. A small minority of scallop species live cemented to rocky substrates as adults, while others attach themselves to stationary or rooted objects such as seagrass at some point in their lives by means of a filament they secrete called a byssal thread. The majority of species, however, live recumbent on sandy substrates, and when they sense the presence of a pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pecten Oculi
The pecten or pecten oculi is a comb-like structure of blood vessels belonging to the choroid in the eye of a bird. It is a non- sensory, pigmented structure that projects into the vitreous humor from the point where the optic nerve enters the eyeball. The pecten is believed to both nourish the retina and control the pH of the vitreous body. High level of enzyme alkaline phosphatase activity in pecten oculi has been linked to transport of nutrient molecules from highly vascularized pecten oculi into vitreous and then into retinal cells for nourishment. It is present in all birds and some reptiles. In the vertebrate eye, there are blood vessels in front of the retina, partially obscuring the image. The pecten helps to solve this problem by greatly reducing the number of blood vessels in the retina and leading to the extremely sharp eyesight of birds such as hawks. The pigmentation of the pecten is believed to protect the blood vessels against damage from ultraviolet light. Str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pecten (biology)
A pecten (plural pectens or pectines) is a comb-like structure, widely found in the biological world. Although pectens in various animals look similar, they have a varied range of uses, from grooming and filtering to sensory adaptations. Etymology The adjective, pectinate, means supplied with a comb-like structure. This form, cognate to pecten with both derived from the Latin for comb, ''pectin'' (genitive ''pectinis''), is reflected in numerous scientific names in forms such as pectinata, pectinatus or pectinatum, or in specific epithets such as ''Murex pecten''. Some toothcombs are referred to as pectinations. Oral use In ducks, they exist on the sides of the bill and serve both as a strainer for food and a comb for preening. Whales have a similar oral comb-like structure called baleen. Retinal use The avian eye also contains a structure called a pecten oculi, which is a comb-like projection of the retina. It is thought to enhance nutrition for the cells of the ret ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venus Comb Murex
The Venus comb murex, scientific name ''Murex pecten'', is a species of large predatory sea snail, a marine gastropod mollusk in the family Muricidae, the rock snails or murex snails. The shell of this Indo-Pacific species has a very long siphonal canal, and numerous spines. Distribution This species is native to Indo-Pacific waters. Shell description The shell of this snail has an extremely long siphonal canal. The shell has over one hundred spines, which provide protection from predation, and prevent the snail from sinking in the soft mud. Like many other ''Murex ''Murex'' is a genus of medium to large sized predatory tropical sea snails. These are carnivorous marine gastropod molluscs in the family Muricidae, commonly called "murexes" or "rock snails".Houart, R.; Gofas, S. (2010). Murex Linnaeus, 1758 ...'' snails, it feeds on other mollusks. This is a common species, but perfect specimens of the shell are not easily found because of the fragility of the numerous l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pecten (company)
Pecten or pectin may refer to: Pecten Biology * Pecten (biology), any comb like structure in animals * ''Pecten'' (bivalve), a genus of scallops * Pecten (company), a subsidiary of Sinopec * Pecten oculi, a structure in the bird retina which contains most of the vasculature Other uses * Pecten, Alberta, Canada * Venus comb murex, after its scientific name ''Murex pecten'' Pectin * Pectin, a plant polysaccharide * Pectineus muscle, a thigh muscle * Pectinoidea, a superfamily of bivalve mollusks which includes Pectinidae ** Pectinidae, a family of bivalve mollusks *** ''Pecten albicans'', Japanese baking scallop *** ''Pecten excavatus'' *** ''Pecten sulcicostatus'', South African scallop See also * Pectineal line (other) Pectineal line may refer to: * Pectineal line (femur) *Pectineal line (pubis) *Pectinate line The pectinate line (dentate line) is a line which divides the upper two-thirds and lower third of the anal canal. Developmentally, this line represen ... ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pectineus Muscle
The pectineus muscle (, from the Latin word ''pecten'', meaning comb) is a flat, quadrangular muscle, situated at the anterior (front) part of the upper and medial (inner) aspect of the thigh. The pectineus muscle is the most anterior adductor of the hip. The muscle does adduct and internally rotate the thigh but its primary function is hip flexion. It can be classified in the medial compartment of thigh (when the function is emphasized) or the anterior compartment of thigh (when the nerve is emphasized). Structure The pectineus muscle arises from the pectineal line of the pubis and to a slight extent from the surface of bone in front of it, between the iliopectineal eminence and pubic tubercle, and from the fascia covering the anterior surface of the muscle; the fibers pass downward, backward, and lateral, to be inserted into the pectineal line of the femur which leads from the lesser trochanter to the linea aspera. Relations The pectineus is in relation by its anterior s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pecten Albicans
''Pecten albicans'', common name Japanese baking scallop, is a species of marine bivalve mollusks in the family Pectinidae, the scallops. Description ''Pecten albicans'' has a shell reaching a size of 95 mm, with about 12 radiating ribs. The color of the surface usually ranges from light brown to dark brown, but it may be also orange or purple. The lower valve of this species is less convex than in ''Pecten excavatus''. This species is of commercial value for fishing in Japan. Distribution This species can be found in the Japanese and the South China Sea The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phi ...s. Habitat These scallops are present in shallow inshore reef areas, at depths of 40–115 meters. References WoRMSEncyclopedia of lifeDiscover Life External links Conchology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pecten Excavatus
''Pecten excavatus'' is a species of scallop, marine bivalve molluscs in the taxonomic family Pectinidae. Shell description In this species, the valves are greatly inequal and plano-convex in shape: the right valve is highly convex, and the left valve is correspondingly concave, an arrangement unusual within the scallop family. The valves are front-back symmetrical, however, and the ears are equal, convex, and rectangularly truncated. It can be distinguished from the very similar species ''Pecten albicans ''Pecten albicans'', common name Japanese baking scallop, is a species of marine bivalve mollusks in the family Pectinidae, the scallops. Description ''Pecten albicans'' has a shell reaching a size of 95 mm, with about 12 radiating ribs. The c ...'' by the number of ribs present on either valve. ''P. albicans'' has in the range of seven to ten ribs with a mode of eight, while those of ''P. excavatus'' range from eight to eleven or more with an average number of ten. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pecten (bivalve)
''Pecten'' is a genus of large scallops or saltwater clams, marine bivalve molluscs in the family Pectinidae, the scallops. This is the type genus of the family. This genus is known in the fossil record from the Cretaceous period to the Quaternary period (age range: from 70.6 to 0.0 million years ago). Fossil shells within this genus have been found all over the world. Etymology The name ''Pecten'' is from the Latin word for a comb or rake. Since 1904, a ''Pecten'' shell has been used as the basis of the logo of Shell petroleum company. Species Species in the genus ''Pecten'' include: *'' P. albicans'' (Schröter, 1802) *'' P. afribenedictus'' Kilburn & Dijkstra 1995 *'' P. alcesianus'' † McLearn 1933 *'' P. alpha'' † Dall 1898 *'' P. argillensis'' † Conrad 1860 *'' P. assinboiensis'' † Russell & Landes 1937 *'' P. aurantiacus'' Roding 1798 *'' P. aztecus'' † Bose 1906 *'' P. barretti'' † Seeley 1861 *'' P. bifidus'' † Menke 1843 *'' P.biddleana'' †Kell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinopec
China Petroleum & Chemical Corporation (中国石油化工股份有限公司) or Sinopec (), is a Chinese oil and gas enterprise based in Beijing. It is listed in Hong Kong and also trades in Shanghai. Sinopec Limited's parent, Sinopec Group, is the world's largest oil refining, gas and petrochemical conglomerate, headquartered in Chaoyang District, Beijing. Sinopec's business includes oil and gas exploration, refining, and marketing; production and sales of petrochemicals, chemical fibers, chemical fertilizers, and other chemical products; storage and pipeline transportation of crude oil and natural gas; import, export and import/export agency business of crude oil, natural gas, refined oil products, petrochemicals, and other chemicals. It also produces ethanol and several biofuels such as biodiesel and green jet fuel, from waste vegetable oil. Corporate history Sinopec Limited was established as a joint stock entity under the China Petrochemical Corporation Group (Sino ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pecten, Alberta
The Municipal District of Pincher Creek No. 9 is a municipal district (MD) in southwestern Alberta, Canada. Located in Census Division No. 3, its municipal office is located in the Town of Pincher Creek. History The MD of Pincher Creek No. 9 was originally renamed from the ''MD of Crowsnest No. 39'' to the ''MD of Pincher Creek No. 39'' in 1944. It was renumbered a year later in 1945. Geography Communities and localities The following urban municipalities are surrounded by the MD of Pincher Creek No. 9. ;Cities *none ;Towns *Pincher Creek ;Villages * Cowley ; Summer villages *none The following hamlets are located within the MD of Pincher Creek No. 9. ;Hamlets *Beaver Mines * Lowland Heights * Lundbreck * Pincher Station * Twin Butte The following localities are located within the MD of Pincher Creek No. 9. ;Localities * Burmis *Chapel Rock *Drywood *Improvement District No. 40 *Maycroft *North Fork *Pecten *Springridge *Summerview *Tod Creek Demographics In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pectin
Pectin ( grc, πηκτικός ': "congealed" and "curdled") is a heteropolysaccharide, a structural acid contained in the primary lamella, in the middle lamella, and in the cell walls of terrestrial plants. The principal, chemical component of pectin is galacturonic acid (a sugar acid derived from galactose) which was isolated and described by Henri Braconnot in 1825. Commercially produced pectin is a white-to-light-brown powder, produced from citrus fruits for use as an edible gelling agent, especially in jams and jellies, dessert fillings, medications, and sweets; and as a chemical stabiliser in fruit juices and milk drinks, and as a source of dietary fiber. Biology Pectin is composed of complex polysaccharides that are present in the primary cell walls of a plant, and are abundant in the green parts of terrestrial plants. Pectin is the principal component of the middle lamella, where it binds cells. Pectin is deposited by exocytosis into the cell wall via vesicles produc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
