colloid: short synonym for colloidal system. colloidal: state of subdivision such that the molecules or polymolecular particles dispersed in a medium have at least one dimension between approximately 1 nm and 1 μm, or that in a system discontinuities are found at distances of that order.
lost-wax casting also called 'investment casting', 'precision casting', or cire perdue which has been adopted into english from the french is the process by which a duplicate metal sculpture often silver, gold, brass or bronze is cast from an original sculpture. intricate works can be achieved by this method. the oldest known example of this technique is a 6,000-year old amulet from indus .
erythrina / ˌ ɛr ɪ ˈ θ r aɪ n ə / is a genus of flowering plants in the pea family, fabaceae.it contains about 130 species, which are distributed in tropical and subtropical regions worldwide. they are trees, with the larger species growing up to 30 m 98 ft in height.the generic name is derived from the greek word ερυθρóς erythros , meaning 'red', referring to the flower color .
this american goldfinch ranges from the southwestern united states near the coast, as far north as extreme southwestern washington to venezuela and peru. it migrates from the colder parts of its u.s. range. the lesser goldfinch often occurs in flocks or at least loose associations.
marozia c. 890 – 982 , was a noblewoman famous for her family's influence on the papacy. she is presumably the basis for the legend of a pope joan.; ugolino della gherardesca c. 1220 – 1289 , count of donoratico, was a prominent player in pisan and tuscan politics in the 13th century.; cola di rienzo c. 1313 – 1354 , original name nicola di lorenzo, was a famous political .
the red-crowned woodpecker melanerpes rubricapillus is a resident breeding from southwestern costa rica south to colombia, venezuela, the guianas and tobago.. this woodpecker occurs in forests and semi-open woodland and cultivation. it nests in a hole in a dead tree or large cactus.the clutch is two eggs, incubated by both sexes, which fledge after 31–33 days.
this is a list of the species recorded in venezuela.the avifauna of venezuela has 1393 confirmed species, of which 45 are endemic, six have been introduced by humans, 31 are rare or vagrants, and one has been extirpated.an additional 21 species are hypothetical see below . except as an entry is cited otherwise, the list of species is that of the south american classification committee .
diabase is usually found in smaller relatively shallow intrusive bodies such as dikes and sills.diabase dikes occur in regions of crustal extension and often occur in dike swarms of hundreds of individual dikes or sills radiating from a single volcanic center.. the palisades sill which makes up the new jersey palisades on the hudson river, near new york city, is an example of a diabase sill.
marlin fishing also called billfishing is considered by some game fishermen to be a pinnacle of offshore game fishing, due to the size and power of the four marlin species and their relative rareness. fishing for marlin captured the imagination of some sport fishermen in the 1930s, when well-known angler/authors zane grey, who fished for black, striped, and blue marlin in the pacific, and .
the goliath birdeater is native to the upland rain forest regions of northern south america: suriname, guyana, french guiana, northern brazil, and southern venezuela. most noticeable in the amazon rainforest, the spider is terrestrial, living in deep burrows, and is found commonly in marshy or swampy areas. it is a nocturnal species.
cavefish or cave fish is a generic term for fresh and brackish water fish adapted to life in caves and other underground habitats. related terms are subterranean fish, troglomorphic fish, troglobitic fish, stygobitic fish, phreatic fish and hypogean fish. there are more than 200 scientifically described species of obligate cavefish found on all continents, except antarctica.
the orinoco river spanish pronunciation: is one of the longest rivers in south america at 2,140 kilometres 1,330 mi . its drainage basin, sometimes known as the orinoquia, citation needed covers 880,000 km 2 340,000 sq mi , with 76.3 percent of it in venezuela and the remainder in colombia.it is the third largest river in the world by discharge volume of water.
lungfish are freshwater rhipidistian fish belonging to the subclass dipnoi.lungfish are best known for retaining characteristics primitive within the osteichthyes, including the ability to breathe air, and structures primitive within sarcopterygii, including the presence of lobed fins with a well-developed internal skeleton.. today there are only six known species of lungfish, living only in .
the gold museum, with 35,000 pieces of tumbaga gold, along with 30,000 objects in ceramic, stone and textiles, represents the largest collection of pre-columbian gold in the world. citation needed the botero museum has 123 works of fernando botero and 87 works by international artists. the museum of modern art in bogotá has a collection of .
the name of the taxonomic order, coleoptera, comes from the greek koleopteros κολεόπτερος , given to the group by aristotle for their elytra, hardened shield-like forewings, from koleos, sheath, and pteron, wing.the english name beetle comes from the old english word bitela, little biter, related to bītan to bite , leading to middle english betylle.
the gold dust day gecko phelsuma laticauda is a diurnal species of gecko. it lives in northern madagascar, and on the island of comoros; it has also been introduced to hawaii and other pacific islands. it typically inhabits various kinds of trees and houses. the gold dust day gecko feeds on insects and nectar.
corbicula fluminea is an active suspension feeder, and in the process of feeding by pumping water through its body as well as feeding on interstitial sedimentary material via pedal feeding when suspended grazing items are limited reworks the sediments it resides on through the process of bioturbation.
diabase or dolerite or microgabbro is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine grained to aphanitic chilled margins which may contain tachylite. diabase is the preferred name in north america, while dolerite is the preferred name in the rest of english-speaking world, where sometimes the name diabase is applied to altered dolerites and basalts. some geologists
the airline was established in 2000 and started operations on january 15, 2001 with a flight from brasília to são paulo. it is a subsidiary of the brazilian conglomerate grupo áurea, based in minas gerais state, which has other transportation interests, including brazil's largest long-distance bus company.grupo áurea in turn is owned by the constantino family.
acanthopagrus butcheri, the black bream but also commonly known as the southern black bream, southern bream and blue-nosed bream, is a species of marine and freshwater fish of the porgy family, sparidae.it is a deep-bodied fish, occasionally confused with other similar species that occur within its range, but is generally distinguished from these species by a lack of yellow ventral and anal fins.