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Lignum Vitae (Bonaventure)
Lignum vitae () is a wood, also called guayacan or guaiacum, and in parts of Europe known as Pockholz or pokhout, from trees of the genus '' Guaiacum''. The trees are indigenous to the Caribbean and the northern coast of South America (e.g., Colombia and Venezuela) and have been an important export crop to Europe since the beginning of the 16th century. The wood was once very important for applications requiring a material with its extraordinary combination of strength, toughness, and density. It is also the national tree of the Bahamas, and the Jamaican national flower. The wood is obtained chiefly from '' Guaiacum officinale'' and '' Guaiacum sanctum'', both small, slow-growing trees. All species of the genus ''Guaiacum'' are now listed in Appendix II of CITES (the Convention on International Trade in Endangered Species of Wild Fauna and Flora) as potentially endangered species. ''G. sanctum'' is listed as Near Threatened by the IUCN Red List. Demand for the wood ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymer
A polymer (; Greek '' poly-'', "many" + ''-mer'', "part") is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. Their consequently large molecular mass, relative to small molecule compounds, produces unique physical properties including toughness, high elasticity, viscoelasticity, and a tendency to form amorphous and semicrystalline structures rather than crystals. The term "polymer" derives from the Greek word πολύς (''polus'', meaning "many, much") and μέρος (''meros'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cough
A cough is a sudden expulsion of air through the large breathing passages that can help clear them of fluids, irritants, foreign particles and microbes. As a protective reflex, coughing can be repetitive with the cough reflex following three phases: an inhalation, a forced exhalation against a closed glottis, and a violent release of air from the lungs following opening of the glottis, usually accompanied by a distinctive sound. Frequent coughing usually indicates the presence of a disease. Many viruses and bacteria benefit, from an evolutionary perspective, by causing the host to cough, which helps to spread the disease to new hosts. Most of the time, irregular coughing is caused by a respiratory tract infection but can also be triggered by choking, smoking, air pollution, asthma, gastroesophageal reflux disease, post-nasal drip, chronic bronchitis, lung tumors, heart failure and medications such as angiotensin-converting-enzyme inhibitors (ACE inhibitors). Treatment should t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the Roman Republic it became the dominant language in the Italian region and subsequently throughout the Roman Empire. Even after the fall of Western Rome, Latin remained the common language of international communication, science, scholarship and academia in Europe until well into the 18th century, when other regional vernaculars (including its own descendants, the Romance languages) supplanted it in common academic and political usage, and it eventually became a dead language in the modern linguistic definition. Latin is a highly inflected language, with three distinct genders (masculine, feminine, and neuter), six or seven noun cases (nominative, accusative, genitive, dative, ablative, and vocative), five declensions, four verb conjuga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucalyptus
''Eucalyptus'' () is a genus of over seven hundred species of flowering trees, shrubs or mallees in the myrtle family, Myrtaceae. Along with several other genera in the tribe Eucalypteae, including '' Corymbia'', they are commonly known as eucalypts. Plants in the genus ''Eucalyptus'' have bark that is either smooth, fibrous, hard or stringy, leaves with oil glands, and sepals and petals that are fused to form a "cap" or operculum over the stamens. The fruit is a woody capsule commonly referred to as a "gumnut". Most species of ''Eucalyptus'' are native to Australia, and every state and territory has representative species. About three-quarters of Australian forests are eucalypt forests. Wildfire is a feature of the Australian landscape and many eucalypt species are adapted to fire, and resprout after fire or have seeds which survive fire. A few species are native to islands north of Australia and a smaller number are only found outside the continent. Eucalypts have been grow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acacia
''Acacia'', commonly known as the wattles or acacias, is a large genus of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa and Australasia. The genus name is New Latin, borrowed from the Greek (), a term used by Dioscorides for a preparation extracted from the leaves and fruit pods of ''Vachellia nilotica'', the original type of the genus. In his ''Pinax'' (1623), Gaspard Bauhin mentioned the Greek from Dioscorides as the origin of the Latin name. In the early 2000s it had become evident that the genus as it stood was not monophyletic and that several divergent lineages needed to be placed in separate genera. It turned out that one lineage comprising over 900 species mainly native to Australia, New Guinea, and Indonesia was not closely related to the much smaller group of African lineage that contained ''A. nilotica''—the type species. This meant that the Australasian lineage (by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitex Lignum-vitae
''Vitex lignum-vitae'', known in Australia as yellow hollywood or " lignum-vitae" (also used for other species), is a rainforest tree of eastern Australia. The natural range of distribution is in dry, sub-tropical or tropical rainforest from the Richmond River, New South Wales to Cape York Peninsula at the northernmost tip of Australia. It also occurs in New Guinea. ''Lignum vitae'' is Latin for "wood of life". Description A small to medium tree growing to 30 metres tall and a trunk diameter of 90 cm. The trunk is creamy or brown, with horizontal lines and fissures. Bark sheds in small flakes. Flanged or buttressed at the base of larger trees, the bole is irregular in shape. Juvenile and coppice leaves lobed or angled. Mature leaves opposite, simple, shiny and not toothed. 5 to 13 cm long, often broader towards the tip. Leaf stalks 15 to 25 mm long, hairy and channelled on the upper side. Net veins visible on the leaf's underside. Small foveolae (raised hairy b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australasia
Australasia is a region that comprises Australia, New Zealand and some neighbouring islands in the Pacific Ocean. The term is used in a number of different contexts, including geopolitically, physiogeographically, philologically, and ecologically, where the term covers several slightly different, but related regions. Derivation and definitions Charles de Brosses coined the term (as French ''Australasie'') in ''Histoire des navigations aux terres australes'' (1756). He derived it from the Latin for "south of Asia" and differentiated the area from Polynesia (to the east) and the southeast Pacific (Magellanica). In the late 19th century, the term Australasia was used in reference to the "Australasian colonies". In this sense it related specifically to the British colonies south of Asia: New South Wales, Queensland, South Australia, Tasmania, Western Australia, Victoria (i.e., the Australian colonies) and New Zealand. Australasia found continued geopolitical attention in the earl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argentina
Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the eighth-largest country in the world. It 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 federal state subdivided into twenty-three provinces, and one autonomous city, which is the federal capital and largest city of the nation, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system. Argentina claims sovereignty over the Falkland Islands, South Georgia and the South Sandwich Islands, and a part of Antarctica. The earliest recorded human prese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulnesia
''Bulnesia'' is a genus of flowering plants in the caltrop family, Zygophyllaceae. The wood of some – particularly '' B. arborea'' and '' B. sarmientoi'' – is traded as verawood (colloquially "vera") or ''"lignum vitae"''. They are close relatives of the "true" ''lignum vitae'' trees of genus ''Guaiacum''. Species * ''Bulnesia arborea'' – Maracaibo ''lignum vitae''; 'True' Verawood * ''Bulnesia bonariensis'' Griseb. * '' Bulnesia carrapo'' Killip & Dugand * ''Bulnesia chilensis'' Gay * ''Bulnesia foliosa'' Griseb. * ''Bulnesia loraniensis'' Griseb. * ''Bulnesia macrocarpa'' Phil. * ''Bulnesia rivas-martinezii'' G.Navarro * ''Bulnesia retama'' (Gillies ex Hook. & Arn.) Griseb * ''Bulnesia sarmientoi'' – Argentine ''lignum vitae'', Paraguay ''lignum vitae'', ''"palo santo"'', ''ibiocaí'' * ''Bulnesia schickendantzii ''Bulnesia'' is a genus of flowering plants in the caltrop family, Zygophyllaceae. The wood of some – particularly '' B. arborea'' a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Larreoideae
Larreoideae is a subfamily of the flowering plant family Zygophyllaceae. Genera * ''Bulnesia'' Gay * ''Guaiacum'' L. * ''Larrea'' Cav. * '' Pintoa'' Gay * ''Porlieria'' Ruiz The Spanish surname Ruiz originates from the Germanic personal name " Hrodric" which is composed of the elements "Hrōd", meaning "renown", and "rīc", meaning "power(ful)", thus "famous ruler". Ruiz is a patronymic from the personal name Ruy, a sh ... & Pav. References Rosid subfamilies {{rosid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulnesia Sarmientoi
''Bulnesia sarmientoi'' (recently reclassified as ''Gonopterodendron sarmientoi'') is a tree that inhabits a part of the Gran Chaco area in South America, around the Argentina-Bolivia-Paraguay border. Its wood is often traded as "Paraguay ''lignum vitae''", since it has properties and uses similar to the "true" ''lignum vitae'' trees of genus ''Guaiacum'', which are close relatives. Another trade name is "vera" or "verawood", which may also refer to the even more closely related '' B. arborea''. Another common but rather ambiguous name is ''palo santo'' (Spanish: "holy stick"), which it shares with the species ''Bursera graveolens''. ''Bulnesia sarmientoi'' heartwood is brown, black, and green (varying in color from light olive green to chocolate brown), with streaks. The sapwood is mostly thin and light yellow. The basic specific gravity of this wood is between 0.92 and 1.1 g/cm3. Conservation ''Bulnesia sarmientoi'' was listed as endangered in the 2018 publication of the IU ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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