what is propagation

Some of these include seeds, cuttings, layering, and division. In computer technology, the velocity of propagation of an electrical or electromagnetic signal is the speed of transmission through a physical medium such as a coaxial cable or optical fiber. The act or process of propagating, especially the process by which an impulse is transmitted along a nerve fiber. Velocity of propagation is a measure of how fast a signal travels over time, or the speed of the transmitted signal as compared to the speed of light. ing. What is propagation delay on a PCB? ), as an organism does. 3. to transmit (hereditary features or elements) to or through offspring. When cutting or layering are not feasible, a bud or twig of one plant is grafted onto the fully developed root system of another. Additionally, farmers and gardeners can take advantage of seed propagation by obtaining seeds from plants they wish to propagate or grow. 'Nip it in the butt' or 'Nip it in the bud'? Auxins (growth hormones) are often added to the wounds or soil to stimulate rooting. … The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by … Find more ways to say propagation, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. The propagation delay on a PCB trace is the one-way (source to load) time required by a signal to travel on that trace. Asexual propagation, however, is not unnatural; some of its forms—e.g., layering and grafting—are rather common in nature. Can you spell these 10 commonly misspelled words? After content moderation, lawmakers asked most about misinformation, with 39 questions about the, On September 8, 2020, the same day Stankey's essay in Politico was published, AT&T told the FCC that the agency should not require additional details to verify the accuracy of, My new friend in Mississippi, Carol, is a whiz at, Teenagers are not able to spot a sensationalistic theory involving Princess Diana’s death as a, The populations are so small that inbreeding depression has made seed, Its own survival depends on sparing its victims to continue as vehicles for its, Post the Definition of propagation to Facebook, Share the Definition of propagation on Twitter, We Got You This Article on 'Gift' vs. 'Present'. 4. to spread (a report, doctrine, practice, etc.) Radio propagation is the way radio signals are transmitted from one point to another inside the earth’s atmosphere or free space. “Propagation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/propagation. Since these are electromagnetic waves, they exhibit properties such as reflection, refraction, diffraction, absorption, polarization and scattering. Some species of plants, in their cultivated forms, do not produce seed—e.g., banana, pineapple, and sugarcane. Many types of seeds may be sown in open ground and, barring extreme wetness or extreme aridity, germinate well enough for practical purposes. The seed is made up of three parts: the outer seed coat, which protects the seed; the endosperm, which is a food reserve; and the embryo, which is the young plant itself. It is the time for all ISPs (internet service providers) from all across the globe to update their DNS cache records to know / detect that the IP has changed for your domain. 3 a : to cause to spread out and affect a greater number or … Please select which sections you would like to print: Corrections? Because of their high oxygen requirement, the medium in which the seeds are sown generally should contain more sand (or other filler or mulch material) than ordinary garden soil does. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Get exclusive access to content from our 1768 First Edition with your subscription. 'All Intensive Purposes' or 'All Intents and Purposes'? Sexual propagation involves the union of the pollen (male) with the egg (female) to produce a seed. (2) Propagation, whereby the intermediate reacts with the original reactants, producing stable products and another intermediate, whether of the same or different kind; the new intermediate reacts as before, so a repetitive cycle begins. Many people have held the opinion that asexual propagation is unnatural and that plants thus derived lack the hardiness or the sturdiness of plants grown from seed. Seed propagation is how many plants naturally reproduce. When the isotropic radiator is used for transmission of EM waves we get spherical wavefronts as shown in the figure because it radiates EM waves uniformly and equally in all directions. 1 : to cause to continue or increase by sexual or asexual reproduction. from person to person; disseminate. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Another word for propagation. Propagate comes from the Latin word propagare, which means "to … Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another, or into various parts of the atmosphere. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. New plants are produced either from seed or by the techniques of division, taking cuttings, grafting, budding, or layering. organs, … By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. In a great number of cultivated species, seedlings vary so much that the desired traits are found in only a small proportion. Please tell us where you read or heard it (including the quote, if possible). Of these types of plant propagation, there exists various forms. This is what we usually call 'DNS Propagation' or 'DNS Propagation Time'. Spring manages to start and pause a transaction according to our propagation setting.. Spring calls TransactionManager::getTransaction to get or create a transaction according to the propagation. ‘Let's propagate the idea that citizenship is a responsibility rather than a right.’ ‘The issue is further clouded by the plausible special pleading that the development industry has successfully propagated.’ Other kinds, however, are so exacting in their requirements that these are best met in a propagating house where humidity and temperature can be more rigidly controlled. Cut a 4- to 5-inch-long (10 to 12 cm) stem (or side shoot) just below a leaf, and remove all but two or … These might include different types of cuttings in addition to several methods of layerin… This can occur through fragmentation and regeneration of specific vegetative parts of plants. The only justification for the generalization that asexually propagated plants lack hardiness or sturdiness is the fact that virus diseases can be transmitted by asexual propagation and that most such diseases cannot be transmitted through seed. Some radio signals can travel or propagate around the globe, whereas other radio signals may only propagate over much shorter distances. It supports some of the propagations for all types of TransactionManager, but there are a few of them … Accessed 12 Dec. 2020. Such propagation will occur after any: Changes to your domain’s WHOIS information. Many gardeners will often save and grow ornamental plants and crops from seeds, especially if the plant has many desirable characteristics. Vegetative propagation is an asexual method of plant reproduction that occurs in its leaves, roots and stem. 1) Propagation delay, symbolized t pd, is the time required for a digital signal to travel from the input(s) of a logic gate to the output. transitive verb. With crops that produce seed freely and come true closely enough for the purposes in view, growing from seed usually is the cheapest and most satisfactory method of plant propagation. Definition of propagation. Although vegetative propagation is an alternative way for the production of desired clones, propagation through traditional root cutting is not effective due to long procedure and slow growth (Tyagi and Prakash, 2004; Singh et al., 2008). 2. to reproduce (itself, its kind, etc. Propagation refers to the process of starting new flowers and plants using a plethora of sources, including but not limited to bulbs, seeds, cuttings, or some specific parts of the plant. Propagation This page contains a dynamic collection of propagation information gathered from many different sources. Omissions? Greater porosity makes these media more subject to rapid drying, however, and moisture must be carefully monitored. 15th century, in the meaning defined above. Plants can be propagated in numerous ways. Updates? Here the center of the sphere is the radiator while the radius of the sphere is R. Clearly, all the points at the distance R, lying on the surface of the sphere have equal power densities.The E waves travel in the free space with the velocity of light .i.e. Radio signals can travel over vast distances. b : the spreading of something (such as a belief) abroad or into new regions. How to use a word that (literally) drives some pe... Test your knowledge of the words of the year. https://www.britannica.com/science/propagation-of-plants, Aquatic Community - Propagating Aquarium Plants, University of Missouri Extension - Propagation, Dr. Jungles' Coral Reef Animals of The World - Propagation, The University of Arizona - Plant Propagation, How Stuff Works - Home and Garden - Propagating Plants. Radio propagation, or the way in which radio signals travel can be an interesting topic to study. Many types Plant propagation is the process which grows new plants from a variety of sources: seeds, cuttings, and other plant parts. It then bounces up again to the ionosphere, and continues bouncing back again until it reaches the radio receiver. 2 : to pass along to offspring. Plant propagation is the process of multiplying plants. Navigate parenthood with the help of the Raising Curious Learners podcast. With crops that produce seed freely and come true closely enough for the purposes in view, growing from seed usually is the cheapest and most satisfactory method of plant propagation. Bulbs and other underground rootlike structures, such as tubers and corms, may be divided as they mature. If your dog is about to have puppies, then she's engaged in the propagation of dogs, the creation of new life to further the species. Many diseases of plants are caused by fungi and bacteria carried in or on the seed itself, and treatment of the seed with disinfectants is beneficial. For these and other reasons, horticulturists resort to asexual propagation—i.e., the division or separation and indefinite subdivision of the original plant having the desired traits. ‘the propagation of plants by root cuttings’. It is expressed in time per unit length. to cause (an organism) to multiply by any process of natural reproduction from the parent stock. The propagation delay is the function of the dielectric constant (Er) and the trace geometry/structure. The sections are then placed in a moist medium to root. As a form of electromagnetic radiation, like light waves, radio waves are affected by the phenomena of reflection, refraction, diffraction, absorption, polarization, and scattering. ‘DNS propagation’ is a term used to describe the time frame after making any changes to your domain name. RF propagation is a particularly important topic for an… When a seed is mature and put in a favorable environment, it will germinate (begin active growth). Stem cuttings are rooted in water or a moist potting medium such as sand, peat moss, or vermiculite. WHOIS is a publicly available tool that searches the databases of domain registries and registrars to detail the domain owner contact information. This data is extremely useful for ham radio operators and shortwave listeners to help determine whether or not long distance radio communications are possible. … propagation - the spreading of something (a belief or practice) into new regions Propagation defines our business logic ‘s transaction boundary. Lets look at what are some forms of plant propagation. Because many soils harbour fungi destructive to sprouting seed and young seedlings, soil that is used for germinating seed commonly is sterilized by heat or chemicals. To propagate is to be fruitful and multiply, by the usual routes of reproduction, or by spreading something around — like a rumor. First it bounces off a top layer of the atmosphere called the ionosphere, then it bounces back to the Earth (this is reflection. However radio signals are affected by the medium in which they travel and this can affect the radio propagation or RF propagation and the distances over which the signals can propagate. propagation definition: 1. the act of producing a new plant from a parent plant: 2. the producing of young plants or…. Methods of asexual propagation include bulb division, layering, cutting, and grafting. Definition of propagate. In the following section, seed germination and transplanting of se… Send us feedback. In layering, the stem of a large plant is notched and wrapped in moist sphagnum moss or bent to the ground and covered with moist soil; when roots appear, growing out of the moss, the stem is cut below the roots and potted. Topic to study doctrine, practice, etc. for Spanish Speakers, Britannica.com: Encyclopedia article about propagation ‘. 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