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Parmelia Sulcata
''Parmelia sulcata'' is a foliose lichen in the family Parmeliaceae. It is very tolerant of pollution and has a cosmopolitan distribution, making it one of the most common lichens. It harbours a unicellular ''Trebouxia'' green algal symbiont. Taxonomy First described by Thomas Taylor in 1836 under its current name, ''Parmelia sulcata'' has a large number of named varieties and forms, but no subspecies despite its extensive range. Most taxonomists have left the species in the genus to which Taylor originally assigned it, though mycologist Maurice Choisy assigned it to the genus ''Parmotrema'' in 1952. The genus name ''Parmelia'' is a compound of two Greek words: ''parme'', meaning "fruit bowl" and ''-eileo'', meaning "enclosed". This likely refers to the lecanorine apothecia of species belonging to the genus. The specific epithet ''sulcata'' is derived from ''sulcatus'', meaning "grooved" or "furrowed". The species is known by a number of colloquial names, including hammered sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Taylor (botanist)
Thomas Taylor (1786–1848) was an Irish botanist, bryologist, and mycologist. Life Thomas Taylor, born on a boat on the Ganges, was the eldest son of Joseph Irwin Taylor, colonel in the East Indian army. He was educated at Trinity College, Dublin, graduating B.A. in 1807, and M.B. and M.D. in 1814. He was afterwards elected a fellow of the King and Queen's College of Physicians, and during his residence in Dublin acted as physician in ordinary to Sir Patrick Dun's Hospital. Geneva Sayre. Biographical sketch of Thomas Taylor. Journal of Bryology. volume 14. pages 415-427. 201/ref> He acted as professor of botany and natural history in the Royal Cork Scientific Institution as long as that institution lasted, and then retired to Dunkerron, near Kenmare, co. Kerry. Here his medical knowledge and his purse were freely used for his poorer neighbours during the famine winter of 1847–8, and here he died early in February 1848. Taylor was elected a fellow of the Linnean Society in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greek Language
Greek ( el, label=Modern Greek, Ελληνικά, Elliniká, ; grc, Ἑλληνική, Hellēnikḗ) is an independent branch of the Indo-European family of languages, native to Greece, Cyprus, southern Italy (Calabria and Salento), southern Albania, and other regions of the Balkans, the Black Sea coast, Asia Minor, and the Eastern Mediterranean. It has the longest documented history of any Indo-European language, spanning at least 3,400 years of written records. Its writing system is the Greek alphabet, which has been used for approximately 2,800 years; previously, Greek was recorded in writing systems such as Linear B and the Cypriot syllabary. The alphabet arose from the Phoenician script and was in turn the basis of the Latin, Cyrillic, Armenian, Coptic, Gothic, and many other writing systems. The Greek language holds a very important place in the history of the Western world. Beginning with the epics of Homer, ancient Greek literature includes many works of lasting impo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saanich People
The Saanich or (, ''Xwsenəč'') are Indigenous peoples of North America, indigenous nations from the north coast of the Gulf Islands, Gulf and San Juan Islands, southern Vancouver Island and the southern edge of the Lower Mainland in British Columbia. Saanich bands * – Malahat First Nation * – Pauquachin * – Tsawout * – Tsartlip * – Tseycum First Nation Tribal school Four of the Saanich First Nations, Tsartlip, Pauquachin, Tseycum and Tsawout, created the Tribal School in 1989. It holds classes from preschool to grade 10, with classes for adults in the adult centre next door to the high school where , the language, and culture are taught along with the provincial curriculum. The school is also a venue for community events. See also * Saanich language * Coast Salish peoples References Further reading * Bill, Adriane; Cayou, Roxanne; & Jim, Jacqueline. (2003). ''NET'̸'E NEḰA'̸' SḴELÁLṈEW'̲' [One green tree]''. Victoria, B.C.: First ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Métis
The Métis ( ; Canadian ) are Indigenous peoples who inhabit Canada's three Prairie Provinces, as well as parts of British Columbia, the Northwest Territories, and the Northern United States. They have a shared history and culture which derives from specific mixed European (primarily French) and Indigenous ancestry which became a distinct culture through ethnogenesis by the mid-18th century, during the early years of the North American fur trade. In Canada, the Métis, with a population of 624,220 as of 2021, are one of three major groups of Indigenous peoples that were legally recognized in the Constitution Act of 1982, the other two groups being the First Nations and Inuit. Smaller communities who self-identify as Métis exist in Canada and the United States, such as the Little Shell Tribe of Chippewa Indians of Montana. The United States recognizes the Little Shell Tribe as an Ojibwe Native American tribe. Alberta is the only Canadian province with a recognized Métis Nati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indigenous People
Indigenous peoples are culturally distinct ethnic groups whose members are directly descended from the earliest known inhabitants of a particular geographic region and, to some extent, maintain the language and culture of those original peoples. The term ''Indigenous'' was first, in its modern context, used by Europeans, who used it to differentiate the Indigenous peoples of the Americas from the Europeans, European settlers of the Americas and from the African diaspora, Sub-Saharan Africans who were brought to the Americas as Slavery, enslaved people. The term may have first been used in this context by Thomas Browne, Sir Thomas Browne in 1646, who stated "and although in many parts thereof there be at present swarms of ''Negroes'' serving under the ''Spaniard'', yet were they all transported from ''Africa'', since the discovery of ''Columbus''; and are not indigenous or proper natives of ''America''." Peoples are usually described as "Indigenous" when they maintain traditions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
P-Phenylenediamine
''p''-Phenylenediamine (PPD) is an organic compound with the formula C6H4(NH2)2. This derivative of aniline is a white solid, but samples can darken due to air oxidation. It is mainly used as a component of engineering polymers and composites like kevlar. It is also an ingredient in hair dyes and is occasionally used as a substitute for henna. Production PPD is produced via three routes. Most commonly, 4-nitrochlorobenzene is treated with ammonia and the resulting 4-nitroaniline is then hydrogenated: :ClC6H4NO2 + 2 NH3 → H2NC6H4NO2 + NH4Cl :H2NC6H4NO2 + 3 H2 → H2NC6H4NH2 + 2 H2O In the DuPont route, aniline is converted to diphenyltriazine, which is then converted by acid-catalysis to 4-aminoazobenzene. Hydrogenation of the latter affords PPD.Robert A. Smiley "Phenylene- and Toluenediamines" in ''Ullmann's Encyclopedia of Industrial Chemistry'', 2002, Wiley-VCH, Weinheim. Uses Precursor to polymers PPD is a precursor to aramid plastics and fibers such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potassium Hydroxide
Potassium hydroxide is an inorganic compound with the formula K OH, and is commonly called caustic potash. Along with sodium hydroxide (NaOH), KOH is a prototypical strong base. It has many industrial and niche applications, most of which exploit its caustic nature and its reactivity toward acids. An estimated 700,000 to 800,000 tonnes were produced in 2005. KOH is noteworthy as the precursor to most soft and liquid soaps, as well as numerous potassium-containing chemicals. It is a white solid that is dangerously corrosive. Properties and structure KOH exhibits high thermal stability. Because of this high stability and relatively low melting point, it is often melt-cast as pellets or rods, forms that have low surface area and convenient handling properties. These pellets become tacky in air because KOH is hygroscopic. Most commercial samples are ca. 90% pure, the remainder being water and carbonates. Its dissolution in water is strongly exothermic. Concentrated aqueous solut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soredia
Soredia are common reproductive structures of lichens. Lichens reproduce asexually by employing simple fragmentation and production of soredia and isidia. Soredia are powdery propagules composed of fungal hyphae wrapped around cyanobacteria or green algae. These can be either scattered diffusely across the surface of the lichen's thallus Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms wer ..., or produced in localized structures called soralia. Fungal hyphae make up the basic body structure of lichen. The soredia are released through openings in the upper cortex of the lichen structure. After their release, the soredia disperse to establish the lichen in a new location. References Fungal morphology and anatomy Lichenology {{lichen-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medulla (lichenology)
The medulla is a horizontal layer within a lichen thallus. It is a loosely arranged layer of interlaced hyphae below the upper cortex and photobiont A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Galloway, D.J. (1992). Flora of Australia - ''Lichen Glossary'' The medulla generally has a cottony appearance. It is the widest layer of a heteromerous lichen thallus. References Fungal morphology and anatomy Lichenology {{lichen-stub ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cortex (botany)
In botany, a cortex is an outer layer of a stem or root in a vascular plant, lying below the epidermis but outside of the vascular bundles. The cortex is composed mostly of large thin-walled parenchyma cells of the ground tissue system and shows little to no structural differentiation. The outer cortical cells often acquire irregularly thickened cell walls, and are called collenchyma cells. Plants Stems and branches In the three dimensional structure of herbaceous stems, the epidermis, cortex and vascular cambium form concentric cylinders around the inner cylindrical core of pith. Some of the outer cortical cells may contain chloroplasts, giving them a green color. They can therefore produce simple carbohydrates through photosynthesis. In woody plants, the cortex is located between the periderm (bark) and the vascular tissue (phloem, in particular). It is responsible for the transportation of materials into the central cylinder of the root through diffusion and may als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaucous
''Glaucous'' (, ) is used to describe the pale grey or bluish-green appearance of the surfaces of some plants, as well as in the names of birds, such as the glaucous gull (''Larus hyperboreus''), glaucous-winged gull (''Larus glaucescens''), glaucous macaw (''Anodorhynchus glaucus''), and glaucous tanager (''Thraupis glaucocolpa''). The term ''glaucous'' is also used botanically as an adjective to mean "covered with a greyish, bluish, or whitish waxy coating or bloom that is easily rubbed off" (e.g. glaucous leaves). The first recorded use of ''glaucous'' as a color name in English was in the year 1671. Examples The epicuticular wax coating on mature plum fruit gives them a glaucous appearance. Another familiar example is found in the common grape genus (''Vitis vinifera''). Some cacti have a glaucous coating on their stem(s). Glaucous coatings are hydrophobic so as to prevent wetting by rain. Their waxy character serves to hinder climbing of leaves, stem or fruit by insec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thallus
Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms were previously known as the thallophytes, a polyphyletic group of distantly related organisms. An organism or structure resembling a thallus is called thalloid, thallodal, thalliform, thalline, or thallose. A thallus usually names the entire body of a multicellular non-moving organism in which there is no organization of the tissues into organs. Even though thalli do not have organized and distinct parts (leaves, roots, and stems) as do the vascular plants, they may have analogous structures that resemble their vascular "equivalents". The analogous structures have similar function or macroscopic structure, but different microscopic structure; for example, no thallus has vascular tissue. In exceptional cases such as the Lemnoideae, where ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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