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Folium
Folium ( la, folium, "leaf") may refer to * a leaf of a book: see recto and verso * Folium of Descartes, an algebraic curve * Folium (spider), a marking on the abdomen of a spider Brain anatomy * Folium (brain) * Folium vermis Botany * Turnsole Turnsole or folium was a dyestuff prepared from the annual plant ''Chrozophora tinctoria''. History Turnsole became a mainstay of medieval Illuminated manuscript, manuscript illuminators starting with the development of the technique for extracti ... or folium, a dyestuff * Folium Phyllostachydis, processed leaves of bamboo * Hydrangeae Dulcis Folium, processed leaves of hydrangea {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Folium Of Descartes
In geometry, the folium of Descartes (; named for René Decartes) is an algebraic curve defined by the implicit equation :x^3 + y^3 - 3 a x y = 0. History The curve was first proposed and studied by René Descartes in 1638. Its claim to fame lies in an incident in the development of calculus. Descartes challenged Pierre de Fermat to find the tangent line to the curve at an arbitrary point since Fermat had recently discovered a method for finding tangent lines. Fermat solved the problem easily, something Descartes was unable to do. Since the invention of calculus, the slope of the tangent line can be found easily using implicit differentiation. Graphing the curve The folium of Descartes can be expressed in polar coordinates as :r = \frac, which is plotted on the left. This is equivalent to r = \frac. Another technique is to write y = px and solve for x and y in terms of p. This yields the rational parametric equations: x = ,\, y = . We can see that the parameter is rela ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Folium (spider)
This glossary describes the terms used in formal descriptions of spiders; where applicable these terms are used in describing other arachnids. Links within the glossary are shown . Terms A Abdomen or opisthosoma: One of the two main body parts ( tagmata), located towards the posterior end; see also Abdomen § Other animals Accessory claw: Modified at the tip of the in web-building spiders; used with to grip strands of the web Anal tubercle: A small protuberance (tubercule) above the through which the anus opens Apodeme → Apophysis (plural apophyses): An outgrowth or process changing the general shape of a body part, particularly the appendages; often used in describing the male → Atrium (plural atria): An internal chamber at the entrance to the in female haplogyne spiders B Bidentate: Having two Book lungs: Respiratory organs on the ventral side (underside) of the , in front of the , opening through narrow slits; see also Book lungs Branchial operculum â ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Folium Vermis
The folium vermis is a short, narrow, concealed band at the posterior extremity of the vermis The cerebellar vermis (from Latin ''vermis,'' "worm") is located in the medial, cortico-nuclear zone of the cerebellum, which is in the posterior fossa of the cranium. The primary fissure in the vermis curves ventrolaterally to the superior s ..., consisting apparently of a single folium, but in reality marked on its upper and under surfaces by secondary fissures. Laterally, it expands in either hemisphere into a considerable lobule, the superior semilunar lobule (lobulus semilunaris superior; postero-superior lobules), which occupies the posterior third of the upper surface of the hemisphere, and is bounded below by the horizontal sulcus. The superior semilunar lobules and the folium vermis form the lobus semilunaris. Additional Images File:Slide2AST.JPG, Cerebellum. Superior surface. File:Slide3AST.JPG, Cerebellum. Superior surface. References Cerebellum {{ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turnsole
Turnsole or folium was a dyestuff prepared from the annual plant ''Chrozophora tinctoria''. History Turnsole became a mainstay of medieval Illuminated manuscript, manuscript illuminators starting with the development of the technique for extracting it in the thirteenth century, when it joined the vegetable-based woad and indigo in the illuminator's repertory. Its use was mostly as substitute of the more expensive Tyrian purple, the famous dye obtained from Murex molluscs. However, the queen of blue colorants was always the expensive lapis lazuli or its substitute azurite, ground to the finest powders. Turnsole was downgraded to a shading glaze and fell out of use in the illuminator's palette by the turn of the seventeenth century, with the easier availability of less fugitive mineral-derived blue pigments. According to its method of preparation, turnsole produced a range of translucent colors from blue, through purple to red, depending on its reaction to the acidity or alkalinity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recto And Verso
'''' is the "right" or "front" side and ''verso'' is the "left" or "back" side when text is written or printed on a leaf of paper () in a bound item such as a codex, book, broadsheet, or pamphlet. Etymology The terms are shortened from Latin: and ' (which translate as "on the right side of the leaf" and "on the back side of the leaf"). The two opposite pages themselves are called ' and ' in Latin, and the ablative ', ' already imply that the text on the page (and not the physical page itself) are referred to. Usage In codicology, each physical sheet (', abbreviated ''fol.'' or ''f.'') of a manuscript is numbered, and the sides are referred to as ' and ', abbreviated as ''r'' and ''v'' respectively. Editions of manuscripts will thus mark the position of text in the original manuscript in the form ''fol. 1r'', sometimes with the ''r'' and ''v'' in superscript, as in ''1r'', or with a superscript ''o'' indicating the ablative ', ', as in ''1ro''. This terminology has been stan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Folium (brain)
The cerebellum (Latin for "little brain") is a major feature of the hindbrain of all vertebrates. Although usually smaller than the cerebrum, in some animals such as the mormyrid fishes it may be as large as or even larger. In humans, the cerebellum plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language as well as emotional control such as regulating fear and pleasure responses, but its movement-related functions are the most solidly established. The human cerebellum does not initiate movement, but contributes to coordination, precision, and accurate timing: it receives input from sensory systems of the spinal cord and from other parts of the brain, and integrates these inputs to fine-tune motor activity. Cerebellar damage produces disorders in fine movement, equilibrium, posture, and motor learning in humans. Anatomically, the human cerebellum has the appearance of a separate structure attached to the bottom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phyllostachys
''Phyllostachys'' () is a genus of Asian bamboo in the grass family. Many of the species are found in central and southern China, with a few species in northern Indochina and in the Himalayas. Some of the species have become naturalized in parts of Asia, Australia, the Americas, and southern Europe. The stem or culm has a prominent groove, called a sulcus, that runs along the length of each segment (or internode). Because of this, it is one of the most easily identifiable genera of bamboo. Most of the species spread aggressively by underground rhizomes. Being pioneer plants, phyllostachys species will not spread quickly or achieve mature height without access to direct sunlight throughout most of the day. Some species of ''Phyllostachys'' grow to 100 ft (30 m) tall in optimum conditions. Some of the larger species, sometimes known as "timber bamboo", are used as construction timber and for making furniture. Several species are cultivated as ornamental plants, though th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
