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Tracts Vol 19 P32-33 George Stephenson's Safety Lamp
Tract may refer to: Geography and real estate * Housing tract, an area of land that is subdivided into smaller individual lots * Land lot or tract, a section of land * Census tract, a geographic region defined for the purpose of taking a census Writings * Tract (literature), a short written work, usually of a political or religious nature * Tract (liturgy), a component of Roman Catholic liturgy * Treatise Biology * Nerve tract, a bundle of fibers that connects different parts of the central nervous system - analogous to a nerve in the peripheral nervous system * A genetic tract, a sequence of repeating nucleotides or amino acids, such as a polyglutamine tract * A collection of related anatomic structures, such as: ** Gastrointestinal tract ** Genitourinary tract ** Reproductive tract ** A grouping of feathers, e.g. primaries, auricular, scapular Businesses * Tract (imprint), an imprint of the German group VDM Publishing devoted to the reproduction of Wikipedia content See a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tract Housing
Tract housing is a type of housing development in which multiple similar houses are built on a tract (area) of land that is subdivided into smaller lots. Tract housing developments are found in suburb developments that were modeled on the "Levittown" concept and sometimes encompass large areas of dozens of square miles. Design Tract housing came about in the 1940s when the demand for cheap housing skyrocketed. Economies of scale meant that large numbers of identical houses could be built faster and more cheaply to fulfill the growing demand. Developers would purchase a dozen or more adjacent lots and conduct the building construction as an assembly-line process. Tract housing development makes use of few architectural designs, and labor costs are reduced because workers need to learn the skills and movements of constructing only those designs rather than repeat the learning curve. In addition, as all houses in the development will be built at the same time, the cost of purchasi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Land Lot
In real estate, a lot or plot is a tract or parcel of land owned or meant to be owned by some owner(s). A plot is essentially considered a parcel of real property in some countries or immovable property (meaning practically the same thing) in other countries. Possible owner(s) of a plot can be one or more person(s) or another legal entity, such as a company/corporation, organization, government, or trust. A common form of ownership of a plot is called fee simple in some countries. A small area of land that is empty except for a paved surface or similar improvement, typically all used for the same purpose or in the same state is also often called a plot. Examples are a paved car park or a cultivated garden plot. This article covers plots (more commonly called lots in some countries) as defined parcels of land meant to be owned as units by an owner(s). Like most other types of property, lots or plots owned by private parties are subject to a periodic property tax payable by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Census Tract
A census tract, census area, census district or meshblock is a geographic region defined for the purpose of taking a census. Sometimes these coincide with the limits of cities, towns or other administrative areas and several tracts commonly exist within a county. In unincorporated areas of the United States these are often arbitrary, except for coinciding with political lines. Census tracts represent the smallest territorial entity for which population data are available in many countries. In the United States, census tracts are subdivided into block groups and census blocks. In Canada they are divided into dissemination areas. In the U.S., census tracts are "designed to be relatively homogeneous units with respect to population characteristics, economic status, and living conditions" and "average about 4,000 inhabitants". By country Brazil The Brazilian Institute of Geography and Statistics uses the term census sector (''setor censitário'')''.'' As of the 2010 Census, there ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tract (literature)
A tract is a literary work and, in current usage, usually religious in nature. The notion of what constitutes a tract has changed over time. By the early part of the 21st century, a tract referred to a brief pamphlet used for religious and political purposes, though far more often the former. Tracts are often either left for someone to find or handed out. However, there have been times in history when the term implied tome-like works. A ''tractate'', a derivative of a tract, is equivalent in Hebrew literature to a ''chapter'' of the Christian Bible. History The distribution of tracts pre-dates the development of the printing press, with the term being applied by scholars to religious and political works at least as early as the 7th century. They were used to disseminate the teachings of John Wycliffe in the 14th century. As a political tool, they proliferated throughout Europe during the 17th century. They have been printed as persuasive religious material since the invention ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tract (liturgy)
The tract (Latin: tractus) is part of the proper of the Christian liturgical celebration of the Eucharist, used instead of the Alleluia in Lent or Septuagesima, in a Requiem Mass, and other penitential occasions, when the joyousness of an Alleluia is deemed inappropriate. Tracts are not, however, necessarily sorrowful. The name apparently derives from either the drawn-out style of singing or the continuous structure without a refrain. There is evidence, however, that the earliest performances were sung responsorially, and it is probable that these were dropped at an early stage. In their final form, tracts are a series of psalm verses; rarely a complete psalm, but all the verses are from the same psalm. They are restricted to only two modes, the second and the eighth. The melodies follow centonization patterns more strongly than anywhere else in the repertoire; a typical tract is almost exclusively a succession of such formulas. The cadences are nearly always elaborate melismas. Tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treatise
A treatise is a formal and systematic written discourse on some subject, generally longer and treating it in greater depth than an essay, and more concerned with investigating or exposing the principles of the subject and its conclusions."Treatise." Merriam-Webster Online Dictionary. Accessed September 12, 2020. A monograph is a treatise on a specialized topic. Etymology The word 'treatise' first appeared in the fourteenth century as the Medieval English word ''tretis'', which evolved from the Medieval Latin ''tractatus'' and the Latin ''tractare'', meaning to treat or to handle. Historically significant treatises Table The works presented here have been identified as influential by scholars on the development of human civilization. Discussion of select examples Euclid's ''Elements'' Euclid's ''Elements'' has appeared in more editions than any other books except the ''Bible'' and is one of the most important mathematical treatises ever. It has been translated to numer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nerve Tract
A nerve tract is a bundle of nerve fibers (axons) connecting nuclei of the central nervous system. In the peripheral nervous system this is known as a nerve, and has associated connective tissue. The main nerve tracts in the central nervous system are of three types: association fibers, commissural fibers, and projection fibers. A tract may also be referred to as a commissure, decussation, pathway or fasciculus. A commissure connects the two cerebral hemispheres at the same levels, while a decussation connects at different levels (crosses obliquely). Types The nerve fibers in the central nervous system can be categorized into three groups on the basis of their course and connections. Different tracts may also be referred to as ''projections'' or ''radiations''. Association fibers The tracts that connect cortical areas within the same hemisphere are called association tracts. Long association fibers connect different lobes of a hemisphere to each other whereas short assoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyglutamine Tract
A polyglutamine tract or polyQ tract is a portion of a protein consisting of a sequence of several glutamine units. A tract typically consists of about 10 to a few hundred such units. A multitude of genes, in various eukaryotic species (including humans), contain a number of repetitions of the nucleotide triplet C A G or C A A. When the gene is translated into a protein, each of these triplets gives rise to a glutamine unit, resulting in a polyglutamine tract. Different alleles of such a gene often have different numbers of triplets since the highly repetitive sequence is prone to contraction and expansion. Several inheritable neurodegenerative disorders, the polyglutamine diseases, occur if a mutation causes a polyglutamine tract in a specific gene to become too long. Important examples of polyglutamine diseases are spinocerebellar ataxia and Huntington's disease. Trinucleotide repeat expansion occurring in a parental germline cell can lead to children that are more affected or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastrointestinal Tract
The gastrointestinal tract (GI tract, digestive tract, alimentary canal) is the tract or passageway of the digestive system that leads from the mouth to the anus. The GI tract contains all the major organ (biology), organs of the digestive system, in humans and other animals, including the esophagus, stomach, and intestines. Food taken in through the mouth is digestion, digested to extract nutrients and absorb energy, and the waste expelled at the anus as feces. ''Gastrointestinal'' is an adjective meaning of or pertaining to the stomach and intestines. Nephrozoa, Most animals have a "through-gut" or complete digestive tract. Exceptions are more primitive ones: sponges have small pores (ostium (sponges), ostia) throughout their body for digestion and a larger dorsal pore (osculum) for excretion, comb jellies have both a ventral mouth and dorsal anal pores, while cnidarians and acoels have a single pore for both digestion and excretion. The human gastrointestinal tract consists o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genitourinary Tract
The genitourinary system, or urogenital system, are the organs of the reproductive system and the urinary system. These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathways, like the male urethra. Also, because of their proximity, the systems are sometimes imaged together. The term "apparatus urogenitalis" was used in ''Nomina Anatomica'' (under Splanchnologia) but is not used in the current ''Terminologia Anatomica''. Development The urinary and reproductive organs are developed from the intermediate mesoderm. The permanent organs of the adult are preceded by a set of structures that are purely embryonic and that, with the exception of the ducts, disappear almost entirely before the end of fetal life. These embryonic structures are on either side: the pronephros, the mesonephros and the metanephros of the kidney, and the Wolffian and Müllerian ducts of the sex organ. The pronephros disappears very ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reproductive Tract
The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical sex organs, organs involved in sexual reproduction. Many non-living substances such as fluids, hormones, and pheromones are also important accessories to the reproductive system. Unlike most organ systems, the sexes of sexual differentiation, differentiated species often have significant differences. These differences allow for a combination of genetic material between two individuals, which allows for the possibility of greater genes, genetic Fitness (biology), fitness of the offspring. Reproductive System 2001 Body Guide powered by Adam Animals In mammals, the major organs of the reproductive system include the external genitalia (penis and vulv ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feathers
Feathers are epidermal growths that form a distinctive outer covering, or plumage, on both avian (bird) and some non-avian dinosaurs and other archosaurs. They are the most complex integumentary structures found in vertebrates and a premier example of a complex evolutionary novelty. They are among the characteristics that distinguish the extant birds from other living groups. Although feathers cover most of the bird's body, they arise only from certain well-defined tracts on the skin. They aid in flight, thermal insulation, and waterproofing. In addition, coloration helps in communication and protection. Plumology (or plumage science) is the name for the science that is associated with the study of feathers. Feathers have a number of utilitarian, cultural, and religious uses. Feathers are both soft and excellent at trapping heat; thus, they are sometimes used in high-class bedding, especially pillows, blankets, and mattresses. They are also used as filling for winter clothin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
