|
Donor
A donor in general is a person, organization or government which donates something voluntarily. The term is usually used to represent a form of pure altruism, but is sometimes used when the payment for a service is recognized by all parties as representing less than the value of the donation and that the motivation is altruistic. In business law a ''donor'' is someone who is giving the gift (law), and a ''donee'' the person receiving the gift. More broadly, the term is used to refer to any entity that serves as the source of something transferred to a different entity, including - in scientific fields - the source of matter or energy passed from one object to another. The Online Etymology Dictionary traces the English-language word "donor" back to the mid-15th century, with origins in Anglo-French, Old French, Latin and Proto-Indo-European. In science Often the word is used as a shorter term for: * Blood donor * Donor (semiconductors) * Egg donor * Electron donor — (by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sperm Donation
Sperm donation is the provision by a man of his sperm with the intention that it be used in the artificial insemination or other "fertility treatment" of one or more women who are not his sexual partners in order that they may become pregnant by him. Where pregnancies go to full term, the sperm donor will be the biological father of every baby born from his donations. The man is known as a sperm donor and the sperm he provides is known as "donor sperm" because the intention is that the man will give up all legal rights to any child produced from his sperm, and will not be the legal father. Sperm donation may also be known as "semen donation". Sperm donation should be distinguished from "shared parenthood" where the male who provides the sperm used to conceive a baby agrees to participate in the child's upbringing. Where a sperm donor provides his sperm in order for it to be used to father a child for a woman with whom he has little or no further contact, it is a form of third part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organ Donation
Organ donation is the process when a person authorizes an organ (anatomy), organ of their own to be removed and organ transplantation, transplanted to another person, #Legislation and global perspectives, legally, either by consent while the donor is alive, through a Authorization, legal authorization for deceased donation made prior to death, or for deceased donations through the authorization by the De jure, legal next of Kinship, kin. Donation may be for research or, more commonly, healthy transplantable organs and tissues may be donated to be transplanted into another person. Common transplantations include kidney transplantation, kidneys, heart transplantation, heart, liver transplantation, liver, pancreas transplantation, pancreas, intestine transplantation, intestines, lung transplantation, lungs, bone transplantation, bones, bone marrow transplantation, bone marrow, skin transplantation, skin, and cornea transplantation, corneas. Some organs and tissues can be donated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blood Donation
A 'blood donation'' occurs when a person voluntarily has blood drawn and used for transfusions and/or made into biopharmaceutical medications by a process called fractionation (separation of whole blood components). A donation may be of whole blood, or of specific components directly ( apheresis). Blood banks often participate in the collection process as well as the procedures that follow it. In the developed world, most blood donors are unpaid volunteers who donate blood for a community supply. In some countries, established supplies are limited and donors usually give blood when family or friends need a transfusion (directed donation). Many donors donate for several reasons, such as a form of charity, general awareness regarding the demand for blood, increased confidence in oneself, helping a personal friend or relative, and social pressure. Despite the many reasons that people donate, not enough potential donors actively donate. However, this is reversed during dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egg Donation
Egg donation (also referred to as "oocyte donation") is the process by which a woman donates eggs to enable another woman to conceive as part of an assisted reproduction treatment or for biomedical research. For assisted reproduction purposes, egg donation typically involves in vitro fertilization technology, with the eggs being fertilized in the laboratory; more rarely, unfertilized eggs may be frozen and stored for later use. Egg donation is a third-party reproduction as part of assisted reproductive technology. In the United States, the American Society for Reproductive Medicine has issued guidelines for these procedures, and the Food and Drug Administration has a number of guidelines as well. There are boards in countries outside of the US which have the same regulations. However, egg donation agencies in the U.S. can choose whether to abide by the society's regulations or not. History The first child born from egg donation was reported in Australia in 1983. In July 1983, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donor Portrait
A donor portrait or votive portrait is a portrait in a larger painting or other work showing the person who commissioned and paid for the image, or a member of his, or (much more rarely) her, family. ''Donor portrait'' usually refers to the portrait or portraits of donors alone, as a section of a larger work, whereas ''votive portrait'' may often refer to a whole work of art intended as an ex-voto, including for example a Madonna, especially if the donor is very prominent. The terms are not used very consistently by art historians, as Angela Marisol Roberts points out, and may also be used for smaller religious subjects that were probably made to be retained by the commissioner rather than donated to a church. Donor portraits are very common in religious works of art, especially paintings, of the Middle Ages and Renaissance, the donor usually shown kneeling to one side, in the foreground of the image. Often, even late into the Renaissance, the donor portraits, especially when of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Official Development Assistance
Official development assistance (ODA) is a category used by the Development Assistance Committee (DAC) of the Organisation for Economic Co-operation and Development (OECD) to measure foreign aid. The DAC first adopted the concept in 1969. It is widely used as an indicator of international aid flow. It refers to material resources given by the governments of richer countries to promote the economic development of poorer countries and the welfare of their people. The donor government agency may disburse such resources to the government of the recipient country or through other organizations. Most ODA is in the form of grants, but some is measured as the concessional value in soft (low-interest) loans. In 2019, the annual amount of state donor aid counted as ODA was US$168 billion, of which US$152 billion came from DAC donors. Concept and definition In order to co-ordinate and measure international aid effectively, the DAC needs its members to have agreed clear criteria for what i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electron Donor
In chemistry, an electron donor is a chemical entity that transfers electrons to another compound. It is a reducing agent that, by virtue of its donating electrons, is itself oxidized in the process. An obsolete definition equated an electron donor and a Lewis base. In contrast to traditional reducing agents, electron transfer from a donor to an electron acceptor may be only fractional. The electron is not completely transferred, which results in an Delocalized electron, electron resonance between the donor and acceptor. This leads to the formation of charge transfer complexes, in which the components largely retain their chemical identities. The electron donating power of a donor molecule is measured by its ionization potential, which is the energy required to remove an electron from the highest occupied molecular orbital (HOMO and LUMO, HOMO). The overall energy balance (ΔE), i.e., energy gained or lost, in an electron donor-acceptor transfer is determined by the difference bet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donor (fairy Tale)
In fairy tales, a donor is a character who tests the hero (and sometimes other characters as well) and provides magical assistance to the hero upon their success. The fairy godmother is a well-known form of this character. Many other supernatural patrons feature in fairy tales; these include various kinds of animals and the spirit of a dead mother. In fairy tale and legend In his analysis of fairy tales, Vladimir Propp identified this role as the ''donor'' and listed it as one of the seven roles found in fairy tales. Before giving the hero magical support or advice, the donor may also test the hero, by questioning him, setting him tasks, or making requests of him. Then, the donor may directly give the hero a magical agent, advise him on how to find one, or offer to act on his behalf. If the character itself acts on behalf of the hero, it also takes on the role of ''helper'' in Propp's analysis. Because a donor is defined by acts, other characters may fill the role, even the v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donor (semiconductors)
In semiconductor physics, a donor is a dopant atom that, when added to a semiconductor, can form a n-type region. For example, when silicon (Si), having four valence electrons, is to be doped as a n-type semiconductor, elements from group V like phosphorus (P) or arsenic (As) can be used because they have five valence electrons. A dopant with five valence electrons is also called a pentavalent impurity. Other pentavalent dopants are antimony (Sb) and bismuth (Bi). When substituting a Si atom in the crystal lattice, four of the valence electrons of phosphorus form covalent bonds with the neighbouring Si atoms but the fifth one remains weakly bonded. If that electron is liberated, the initially electro-neutral donor becomes positively charged (ionised). At room temperature, the liberated electron can move around the Si crystal and carry a current, thus acting as a charge carrier In solid state physics, a charge carrier is a particle or quasiparticle that is free to mov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semiconductor
A semiconductor is a material with electrical conductivity between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (" doping") to its crystal structure. When two regions with different doping levels are present in the same crystal, they form a semiconductor junction. The behavior of charge carriers, which include electrons, ions, and electron holes, at these junctions is the basis of diodes, transistors, and most modern electronics. Some examples of semiconductors are silicon, germanium, gallium arsenide, and elements near the so-called " metalloid staircase" on the periodic table. After silicon, gallium arsenide is the second-most common semiconductor and is used in laser diodes, solar cells, microwave-frequency integrated circuits, and others. Silicon is a critical element for fabricating most electronic circuits. Semiconductor devices can display a range of different useful properties, such as passing current more easil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grant (law)
A grant, in law, is a transfer of property, generally from a person or other entity giving the property (the grantor) to a person or entity receiving the property (the grantee). Historically, a grant was a transfer by Deed (law), deed of that which could not be passed by Livery#Sue one's livery, livery, an act evidenced by letters patent under the Great Seal of the Realm, Great Seal, granting something from the king to a subject, and a technical term made use of in deeds of conveyance of lands to import a transfer. Though the word "grant" was originally made use of, in treating of conveyances of interests in lands, to denote a transfer by deed of that which could not be passed by livery, and was applied only to incorporeal hereditaments, it became a generic term, applicable to the transfer of all classes of real property. As distinguished from a mere license, a grant passes some estate or interest, corporeal or incorporeal, in the lands which it embraces; can only he made by an i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fairy Tale
A fairy tale (alternative names include fairytale, fairy story, household tale, magic tale, or wonder tale) is a short story that belongs to the folklore genre. Such stories typically feature magic, enchantments, and mythical or fanciful beings. In most cultures, there is no clear line separating myth from folk or fairy tale; all these together form the literature of preliterate societies. Fairy tales may be distinguished from other folk narratives such as legends (which generally involve belief in the veracity of the events described) and explicit moral tales, including beast fables. Prevalent elements include dragons, dwarfs, elves, fairies, giants, gnomes, goblins, griffins, merfolk, monsters, monarchy, pixies, talking animals, trolls, unicorns, witches, wizards, magic, and enchantments. In less technical contexts, the term is also used to describe something blessed with unusual happiness, as in "fairy-tale ending" (a happy ending) or "fairy-tale romance". ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
