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Chlortoluron
Chlortoluron or chlorotoluron are the common names for an organic compound of the phenylurea class of herbicides used to control broadleaf and annual grass weeds in cereal crops. History In 1952, chemists at E. I. du Pont de Nemours and Company patented a series of aryl urea derivatives as herbicides. Several compounds covered by this patent were commercialized as herbicides: monuron (4-chlorophenyl), diuron (3,4-dichlorophenyl) and chlortoluron, the 3-chloro-4-methylphenyl example. Subsequently, over thirty related urea analogs with the same mechanism of action reached the market worldwide. Synthesis As described in the du Pont patent, the starting material is a substituted aryl amine, an aniline, which is treated with phosgene to form its isocyanate derivative. This is subsequently reacted with dimethylamine to give the final product. :Aryl-NH2 + COCl2 → Aryl-NCO :Aryl-NCO + NH(CH3)2 → Aryl-NHCON(CH3)2 Mechanism of action The phenylurea class of herbicides including chlo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trivial Name
In chemistry, a trivial name is a non systematic name for a chemical substance. That is, the name is not recognized according to the rules of any formal system of chemical nomenclature such as IUPAC inorganic or IUPAC organic nomenclature. A trivial name is not a formal name and is usually a common name. Generally, trivial names are not useful in describing the essential properties of the thing being named. Properties such as the molecular structure of a chemical compound are not indicated. And, in some cases, trivial names can be ambiguous or will carry different meanings in different industries or in different geographic regions (for example, a trivial name such as '' white metal'' can mean various things). Trivial names are simpler. As a result, a limited number of trivial chemical names are retained names, an accepted part of the nomenclature. Trivial names often arise in the common language; they may come from historic usages in, for example, alchemy. Many trivial names ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electron Transport Chain
An electron transport chain (ETC) is a series of protein complexes and other molecules that transfer electrons from electron donors to electron acceptors via redox reactions (both reduction and oxidation occurring simultaneously) and couples this electron transfer with the transfer of protons (H+ ions) across a membrane. The electrons that transferred from NADH and FADH2 to the ETC involves 4 multi-subunit large enzymes complexes and 2 mobile electron carriers. Many of the enzymes in the electron transport chain are membrane-bound. The flow of electrons through the electron transport chain is an exergonic process. The energy from the redox reactions creates an electrochemical proton gradient that drives the synthesis of adenosine triphosphate (ATP). In aerobic respiration, the flow of electrons terminates with molecular oxygen as the final electron acceptor. In anaerobic respiration, other electron acceptors are used, such as sulfate. In an electron transport chain, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solanaceae
The Solanaceae , or nightshades, are a family of flowering plants that ranges from annual and perennial herbs to vines, lianas, epiphytes, shrubs, and trees, and includes a number of agricultural crops, medicinal plants, spices, weeds, and ornamentals. Many members of the family contain potent alkaloids, and some are highly toxic, but many—including tomatoes, potatoes, eggplant, bell and chili peppers—are used as food. The family belongs to the order Solanales, in the asterid group and class Magnoliopsida (dicotyledons). The Solanaceae consists of about 98 genera and some 2,700 species, with a great diversity of habitats, morphology and ecology. The name Solanaceae derives from the genus '' Solanum''. The etymology of the Latin word is unclear. The name may come from a perceived resemblance of certain solanaceous flowers to the sun and its rays. At least one species of ''Solanum'' is known as the "sunberry". Alternatively, the name could originate from the Latin verb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poa Annua
''Poa annua'', or annual meadow grass (known in America more commonly as annual bluegrass or simply poa), is a widespread low-growing turfgrass in temperate climates. Notwithstanding the reference to annual plant in its name, perennial bio-types do exist. This grass may have originated as a hybrid between ''Poa supina'' and '' Poa infirma''. Description It has a slightly creeping, fibrous, rootstock. The stem grows from 15–25 cm (6-10 in.) high. It is slightly flattened, due to being folded rather than rolled. The panicle is open and triangular shaped, 5 to 7.5 cm (2 to 3 in.) long. The spikelets are stalked, awnless, 1 to 2 cm (3/8 to 3/4 in.) long when flowering, and loosely arranged on delicate paired or spreading branches. Sometimes they are tinged purple. The vivid green leaves are short and blunt at the tips, shaped like the prow of a small canoe. They are soft and drooping. Long sheaths clasp the stem. The leaves are smooth above and below, with fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paspalum Distichum
''Paspalum distichum'' is a species of grass. Common names include knotgrass, water finger-grass, couch paspalum, eternity grass, gingergrass, and Thompson grass. Its native range is obscure because it has long been present on most continents, and in most areas it is certainly an introduced species. Its native range probably includes parts of the tropical Americas. This is a perennial grass forming clumps and spreading via rhizomes and stolons. It grows decumbent or erect to a maximum height near 60 centimeters. The inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are forme ... is usually divided into two branches lined with spikelets. ''Paspalum distichum'' is a food source for several avian species, including the long-tailed widowbird. References External links Jepson Man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papaver Rhoeas
''Papaver rhoeas'', with common names including common poppy, corn poppy, corn rose, field poppy, Flanders poppy, and red poppy, is an annual herbaceous species of flowering plant in the poppy family Papaveraceae. It is a temperate native with a very wide distribution area, from Africa to temperate and tropical Asia and Europe. It is regarded as an agricultural weed (hence the common names including "corn" and "field"). As the plant thrives in areas of disturbed soil, it was often abundant in agricultural fields before the advent of herbicides. Flushes of poppies may still appear in fields where herbicides are not used, as well as those in fallow. The corn poppy and its cultivars such as the Shirley poppy are widely grown in gardens, and are frequently found in packets of seed labelled "wildflower mixes". Since World War I, it has been used in the Commonwealth as a symbol of remembrance for fallen soldiers. Description ''Papaver rhoeas'' is a variable, erect annual, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamium
''Lamium'' (dead-nettles) is a genus of about 30 species of flowering plants in the family Lamiaceae, of which it is the type genus. They are all herbaceous plants native to Europe, Asia, and northern Africa, but several have become very successful weeds of crop fields and are now widely naturalised across much of the temperate world. Description The genus includes both annual and perennial species; they spread by both seeds and stems rooting as they grow along the ground. They have square stems and coarsely textured pairs of leaves, often with striking patterns or variegation. They produce double-lipped flowers in a wide range of colours. The common name "dead-nettle" has been derived from the German ''taube-nessel'' ("deaf nettle", or "nettle without a kernel"), and refers to the resemblance of ''Lamium album'' to the very distantly related stinging nettles, but unlike those, they do not have stinging hairs and so are harmless or apparently "dead". Several closely related gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galeopsis
''Galeopsis'', commonly called hemp-nettle or hempnettle, is a genus of annual herbaceous plants native to Europe and Asia. Some species are naturalized in North America and New Zealand. The plants are poisonous. Several species are widespread weeds and some are used as medicinal herbs. Species Species include: # ''Galeopsis × acuminata'' Rchb. - Germany ''(G. pubescens × G. tetrahit)'' # ''Galeopsis bifida'' Boenn. – bifid hemp-nettle, split-lip hemp-nettle, splitlip hempnettle, common hemp-nettle, and large-flowered hemp-nettle - widespread across much of Europe and Asia; naturalized in North America # ''Galeopsis × carinthiaca'' Porsch ex Fiori - Italy, Czech Republic ''(G. bifida × G. pubescens)'' # ''Galeopsis × haussknechtii'' Ludw. - Czech Republic ''(G. ladanum × G. segetum)'' # ''Galeopsis ladanum'' L. - widespread across much of Europe and Asia; naturalized in scattered sites in North America # ''Galeopsis × ludwigii'' Hausskn. - Germany, Czech Republic ''(G. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convolvulaceae
Convolvulaceae (), commonly called the bindweeds or morning glories, is a family of about 60 genera and more than 1,650 species. These species are primarily herbaceous vines, but also include trees, shrubs and herbs. The tubers of several species are edible, the best known of which is the sweet potato. Description Convolvulaceae can be recognized by their funnel-shaped, radially symmetrical corolla; the floral formula for the family has five sepals, five fused petals, five epipetalous stamens (stamens fused to the petals), and a two-part syncarpous and superior gynoecium. The stems of these plants are usually winding, hence their Latin name (from ''convolvere'', "to wind"). The leaves are simple and alternate, without stipules. In parasitic Cuscuta (dodder) they are reduced to scales. The fruit can be a capsule, berry, or nut, all containing only two seeds per one locule (one ovule/ovary). The leaves and starchy, tuberous roots of some species are used as foodstuffs (e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calendula
''Calendula'' () is a genus of about 15–20 species''Calendula''. Flora of China. of and plants in the daisy family that are often known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atriplex Prostrata
''Atriplex prostrata'', called the spear-leaved orache, hastate orache, thin-leaf orache, triangle orache, and fat hen, is a widespread species of flowering plant in the saltbush genus ''Atriplex ''Atriplex'' () is a plant genus of about 250 species, known by the common names of saltbush and orache (; also spelled orach). It belongs to the subfamily Chenopodioideae of the family Amaranthaceae ''s.l.''. The genus is quite variable and ...'', native to Europe, Macaronesia, northern Africa, Ethiopia, the Middle East, western Siberia, and Central Asia, and introduced to temperate North America, South America, Australia, New Zealand, Korea, Japan, and Primorsky Krai in far eastern Russia. It is a facultative halophyte. Subspecies The following subspecies are currently accepted: *''Atriplex prostrata'' subsp. ''calotheca'' (Rafn) M.A.Gust. *''Atriplex prostrata'' subsp. ''latifolia'' (Wahlenb.) Rauschert *''Atriplex prostrata'' subsp. ''polonica'' (Zapal.) Uotila *''Atriplex pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthemis Arvensis
''Anthemis arvensis'', also known as corn chamomile, mayweed, scentless chamomile, or field chamomile is a species of flowering plant in the genus '' Anthemis'', in the aster family. It is used as an ornamental plant. Distribution ;Native :; Palearctic: ::Macaronesia: Azores, Canary Islands ::Northern Africa: Algeria, Tunisia ::Western Asia: Sinai, Iran, Iraq, Saudi Arabia, Turkey ::Caucasus: Georgia, North Caucasus ::Northern Europe: Denmark, Finland, Ireland, Norway, Sweden, United Kingdom ::Central Europe: Austria, Belgium, Czech Republic, Slovakia, Germany, Hungary, Netherlands, Poland, Switzerland ::East Europe: Belarus, Moldova, Ukraine, Crimea ::Southeastern Europe: Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Greece, Crete, Italy, Republic of Macedonia, Montenegro, Romania, Sardinia, Serbia, Sicily, Slovenia ::Southwestern Europe: France Corsica, Portugal, Spain, Balearic Islands ;Introduced Widely naturalized in North and South America, Africa, Australi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
