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Jatropha Dioica
''Jatropha dioica'' is a species of flowering plant in the spurge family, Euphorbiaceae, that is native to Texas in the United States as well as Mexico as far south as Oaxaca. Common names include leatherstem and sangre de drago. The specific name refers to the dioecious nature of the plants. Description ''Jatropha dioica'' forms colonies from subterranean rhizomes. The arching, succulent stems reach a height of 20–60 cm and have few branches. They are tough and sufficiently flexible to be tied into overhand knots without breaking. The orange rootstock spreads to a length of around 1 m. Leaves are arranged simply, alternately, or fascicularly and are clustered on short shoots extending from the stems. They are subsessile and have entire margins. The leaves of the nominate variety are linear and measure up to 6 × 1 cm, whereas the leaves of ''J. dioica'' var. ''graminea'' may be 2 to 3-lobed and measure up to 6.5 × 0.5 cm. Male inflorescences are clustered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martín Sessé Y Lacasta
Martín Sessé y Lacasta (December 11, 1751 – October 4, 1808) was a Spanish botanist, who relocated to New Spain (now Mexico) during the 18th century to study and classify the flora of the territory. Background Sessé studied medicine in Zaragoza, then moved to Madrid in 1775. In 1779 he became a military physician, in which capacity he visited Cuba, and later New Spain. In 1785 he was named a commissioner of the Royal Botanical Garden in New Spain. At the same time a botanical garden and a course of study on the flora of Mexico at the Royal and Pontifical University of Mexico (now UNAM) were authorized. Sessé stopped practicing medicine in order to devote all his energies to botany. The botanical expedition In 1786 Charles III, King of Spain, authorized a major botanical expedition known as the Royal Botanical Expedition to New Spain, that was proposed by Sessé at a time when most of the flora and fauna of Mexico were unknown to European science. Sessé became the head ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diterpene
Diterpenes are a class of chemical compounds composed of four isoprene units, often with the molecular formula C20H32. They are biosynthesized by plants, animals and fungi via the HMG-CoA reductase pathway, with geranylgeranyl pyrophosphate being a primary intermediate. Diterpenes form the basis for biologically important compounds such as retinol, retinal, and phytol. They are known to be antimicrobial and antiinflammatory. Structures As with most terpenes a huge number of potential structures exists, which may be broadly divided according to the number of rings present. Biosynthesis Diterpenes are derived from the addition of one IPP unit to FPP to form geranylgeranyl-pyrophosphate (GGPP). From GGPP, structural diversity is achieved mainly by two classes of enzymes; the diterpene synthases and cytochromes P450. Several diterpenes are produced by plants and cyanobacteria. GGPP is also the precursor for the synthesis of the phytane by the action of the enzyme geranylger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lophophora
''Lophophora'' () is a genus of spineless, button-like cacti. Its area range covers southern through northeastern and north-central Mexico to Querétaro in central Mexico. The species are extremely slow growing, sometimes taking up to thirty years to reach flowering age (at the size of about a golf ball, excluding the root) in the wild. Cultivated specimens grow considerably faster, usually taking between three and ten years to reach from seedling to mature flowering adult. The slow rate of reproduction and over-harvesting by collectors render the species under threat in the wild. Taxonomy ''Lophophora'' means "crest-bearing", referring to the tufts of trichomes that adorn each tubercle. ''Lophophora'' has been reported to have two species, '' L. diffusa'' and '' L. williamsii''. Another three species have been proposed: ''L. fricii'', ''L. koehresii'', and ''L. alberto-vojtechii''. Recent DNA sequencing studies (Butterworth et al. 2002) have shown that ''L. diffusa'' and ''L. w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astringent
An astringent (sometimes called adstringent) is a chemical that shrinks or constricts body tissues. The word derives from the Latin ''adstringere'', which means "to bind fast". Calamine lotion, witch hazel, and yerba mansa, a Californian plant, are astringents. Astringency, the dry, puckering or numbing mouthfeel caused by the tannins in unripe fruits, lets the fruit mature by deterring eating. Ripe fruits and fruit parts including blackthorn (sloe berries), ''Aronia'' chokeberry, chokecherry, bird cherry, rhubarb, quince and persimmon fruits (especially those which are unripe), banana skins (or unripe bananas), cashew fruits and acorns are astringent. Citrus fruits, like lemons, are somewhat astringent. Tannins, being a kind of polyphenol, bind salivary proteins and make them precipitate and aggregate, producing a rough, "sandpapery", or dry sensation in the mouth. The tannins in some teas, coffee, and red grape wines like Cabernet Sauvignon and Merlot produce mild as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gingivitis
Gingivitis is a non-destructive disease that causes inflammation of the gums. The most common form of gingivitis, and the most common form of periodontal disease overall, is in response to bacterial biofilms (also called plaque) that is attached to tooth surfaces, termed ''plaque-induced gingivitis''. Most forms of gingivitis are plaque-induced. While some cases of gingivitis never progress to periodontitis, periodontitis is always preceded by gingivitis. Gingivitis is reversible with good oral hygiene; however, without treatment, gingivitis can progress to periodontitis, in which the inflammation of the gums results in tissue destruction and bone resorption around the teeth. Periodontitis can ultimately lead to tooth loss. Signs and symptoms The symptoms of gingivitis are somewhat non-specific and manifest in the gum tissue as the classic signs of inflammation: *Swollen gums *Bright red gums *Gums that are tender or painful to the touch *Bleeding gums or bleeding after bru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coahuila
Coahuila (), formally Coahuila de Zaragoza (), officially the Free and Sovereign State of Coahuila de Zaragoza ( es, Estado Libre y Soberano de Coahuila de Zaragoza), is one of the 32 states of Mexico. Coahuila borders the Mexican states of Nuevo León to the east, Zacatecas to the south, and Durango and Chihuahua to the west. To the north, Coahuila accounts for a stretch of the Mexico–United States border, adjacent to the U.S. state of Texas along the course of the Rio Grande (Río Bravo del Norte). With an area of , it is the nation's third-largest state. It comprises 38 municipalities ''(municipios)''. In 2020, Coahuila's population is 3,146,771 inhabitants. The largest city and State Capital is the city of Saltillo; the second largest is Torreón (largest metropolitan area in Coahuila and 9th largest in Mexico); the third largest is Monclova (a former state capital); the fourth largest is Ciudad Acuña; and the fifth largest is Piedras Negras. History The name Coahui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jimulco
The Reserva Ecológica Municipal Sierra y Cañón de Jimulco is a protected natural area in Torreón, Coahuila, Mexico. Jimulco has a high mountain range of over 10,000 ft, a riparian area formed by the Aguanaval River, an endorrheic basin and an extensive valley with the characteristic flora and fauna of the Chihuahuan Desert. El Cañon del Realito and El Cañon de la Cabeza are two small canyons of great beauty formed by the Aguanaval. The summit of Sierra de Jimulco is covered in pine-oak forest. The riparian area has old Montezuma bald cypresses, willows and cottonwoods. Cougars and bobcats move from the mountain footholds to the riparian forest. More than 120 species of birds have been observed in the area including mountain bluebirds, red-shouldered hawks and golden eagles. Characteristic vegetation of the Chihuahuan desert includes lechuguilla, ocotillo, cholla cactus, and prickly pear cactus. An endemic subspecies of ''Agave victoriae-reginae'' is common in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trans-Pecos
The Trans-Pecos, as originally defined in 1887 by the Texas geologist Robert T. Hill, is the portion of Texas that lies west of the Pecos River. The term is considered synonymous with Far West Texas, a subdivision of West Texas. The Trans-Pecos is part of the Chihuahuan Desert, the largest desert in North America. It is the most mountainous and arid portion of the state, and most of its vast area (outside the city of El Paso) is sparsely populated. Among the nine counties in the region are the five largest counties by area in Texas and eight of the eleven largest in the state. The area is known for the natural environment of the Big Bend and the gorge of the Rio Grande, part of which has been designated a National Wild and Scenic Rivers System. With the notable exceptions of Big Bend Ranch State Park, Big Bend National Park and the Guadalupe Mountains National Park, the vast majority of the Trans-Pecos region consists of privately owned ranchland. However, most of the region ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zacatecas
, image_map = Zacatecas in Mexico (location map scheme).svg , map_caption = State of Zacatecas within Mexico , coordinates = , coor_pinpoint = , coordinates_footnotes = , subdivision_type = Country , subdivision_name = Mexico , subdivision_type1 = Capital , subdivision_name1 = Zacatecas , subdivision_type2 = Municipalities , subdivision_name2 = 58 , established_title = Admission , established_date = December 23, 1823 , established_title2 = Order , established_date2 = 10th , founder = , seat_type = , seat = , government_footnotes = , leader_party = , leader_title = Governor , leader_name = David Monreal Ávila , leader_title1 = Senators , leader_name1 = , leader_title2 = Deputies , leader_name2 = , unit_pref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chihuahua (state)
Chihuahua (), officially the Free and Sovereign State of Chihuahua ( es, Estado Libre y Soberano de Chihuahua), is one of the 31 states which, along with Mexico City, comprise the 32 federal entities of Mexico. It is located in northwestern Mexico, and is bordered by the states of Sonora to the west, Sinaloa to the southwest, Durango to the south, and Coahuila to the east. To the north and northeast, it shares an extensive border with the U.S. adjacent to the U.S. states of New Mexico and Texas. Its capital city is Chihuahua City; the largest city is Ciudad Juárez. Although Chihuahua is primarily identified with its namesake, the Chihuahuan Desert, it has more forests than any other state in Mexico, aside from Durango. Due to its variant climate, the state has a large variety of fauna and flora. The state is mostly characterized by rugged mountainous terrain and wide river valleys. The Sierra Madre Occidental mountain range, part of the continental spine that also inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Durango
Durango (), officially named Estado Libre y Soberano de Durango ( en, Free and Sovereign State of Durango; Tepehuán: ''Korian''; Nahuatl: ''Tepēhuahcān''), is one of the 31 states which make up the 32 Federal Entities of Mexico, situated in the northwest of the country. With a population of 1,832,650, the 8th lowest of Mexico's states, Durango has Mexico's second-lowest population density, after Baja California Sur. The capital city, Victoria de Durango, is named after the first President of Mexico, Guadalupe Victoria. Geography General information With , Durango accounts for about 6.3% of the entire territory of Mexico. It is the fourth largest state lying at the extreme northwest of the Central Mexican Plateau, where it meets the Sierra Madre Occidental—the highest peaks in the state. The state has an average elevation of 1,775 meters above sea level, with a mean elevation of 1,750 m in the Valleys region and 2,450 m in the Sierra region. The city of Durango is on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuevo León
Nuevo León () is a state in the northeast region of Mexico. The state was named after the New Kingdom of León, an administrative territory from the Viceroyalty of New Spain, itself was named after the historic Spanish Kingdom of León. With a total land area of 64,555 square kilometers (40,112 square miles), Nuevo León is the 13th largest federal entity in Mexico. The state is bordered by Tamaulipas to the east, Coahuila to the west, and both Zacatecas and San Luis Potosi to the south. To the north, it shares an international border with the U.S. state of Texas. The Laredo-Colombia Solidarity International Bridge is the only vehicular bridge that connects the United States with the state of Nuevo León. It crosses over the Rio Grande (Rio Bravo) between the city of Colombia, Nuevo León, and Laredo, Texas. Nuevo Léon is the seventh largest state in terms of population with an estimated population of 5.78 million people in 2020. The state's most populous city is Monterrey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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