A short single-stranded oligonucleotide which, when attached by base-pairing to a single-stranded template molecule, acts as the start point for complementary strand synthesis directed by a DNA polymerase enzyme.
A short nucleic acid sequence containing a free 3 hydroxyl group that forms base pairs with a complementary template strand and functions as the starting point for addition of nucleotides to copy the template strand.
a reagent consisting of a relatively short DNA sequence exactly matching the sequence flanking a marker of interest. A primer needs to be long enough that (in principle) it matches only one spot in the entire human genome, but, in practice, many segments of human DNA appear more than once, through a poorly understood process of duplication. Two primers, one for each end of the desired marker, are used in the PCR amplification step to selectively amplify that marker. The primers are often tagged with a flourescent dye to help in detecting the amplified DNA segments.
Enzymes used to isolate a particular marker on a DNA molecule for amplification or detection. Primers rely on the presence of non-polymorphic sequences in close proximity to the polymorphic locus of interest. The occasional drop out of the x-specific amelogenin marker during Profiler Plus analysis is probably due to mutations at the locus used as a binding site by one of Perkin Elmer's secret primers.
Short sequences of DNA (oligonucleotides) that are complementary to sequences of the template DNA. A molecule that initiates the synthesis of a larger molecule. They are usually between 15 and 30 bases in length.
A short segment of DNA or RNA that anneals to a single strand of DNA in order to initiate template-directed synthesis and extend a new DNA strand by the enzymatic action of DNA polymerase to produce a duplex-stranded molecule.
They put a piece of DNA in a test tube along with a bunch of free nucleotides, short DNA sequences called primers, and some enzymes that help the process along. (IOCeleraGenome) Primer Utilizando-se primers com seqüência complementar às regiões que flanqueiam o sítio de ligação do vetor, o fragmento é duplicado ... (POPrGenoma)
The short sequence of nucleotides (usually eight) which serve to prime the DNA polymerase process during cell division. Primers are produced by the enzyme primase. Primers also can be customized to 'isolate' specific sections of DNA for replication using PCR.
Commonly refers to a short (typically 50 bases), single-stranded DNA molecule that has been artificially synthesized. Except in very special cases the researcher requests and knows the sequence of the primer. The primer is hybridized to complementary DNA sequences allowing DNA synthesis to proceed from the primer sequences. They are used for PCR, probe synthesis and a variety of molecular biology applications.
A primer is a nucleic acid strand, or a related molecule that serves as a starting point for DNA replication. A primer is required because most DNA polymerases, enzymes that catalyze the replication of DNA, cannot begin synthesizing a new DNA strand from scratch, but can only add to an existing strand of nucleotides.
(1) A preliminary paint coating that, when applied to a bare surface, seals pores in the surface and improves paint adhesion. (2) Any coating of thin liquid bituminous solvent applied to a roofing surface to improve the adhesion of a heavier application of bitumen and to absorb dust.
An undercoating paint applied to a surface, sealing it, creating a better bond (adhesion), and providing a ground for a painting. Applying such a ground is called priming. (pr. pri:'mr) Also see gesso. print (artist's print) A multiple-original impression made from a plate, stone, wood block, or screen by an artist or made under the artist's supervision. Prints are usually made in editions, with each print numbered and signed by the artist.
First coat of paint applied to a surface. Such paints are designed to provide adhesion to new surfaces or are formulated to meet the special requirements of the surfaces. Most textile paints won't attach to a primer.
Part of the foundation family, primers are enjoying a resurgence in popularity. Often colourless and applied with a sponge, primer can be used to prep the skin for foundation or worn alone to even out skintone, minimize the appearance of pores and provide a smooth complexion.
Has several functions. They adhere to the surface and generally dry with a matt finish that gives a key for the next coat of paint. Some protect metal surfaces from corrosion while others seal porous materials, such as softwood and brick, which may otherwise absorb too much of the paint binder.
Primers are usually thin, fluid substances that are applied to surfaces to greatly aid the ability of a sealant or adhesive to adhere to the substrate (especially under extraordinarily difficult circumstances). In architectural applications, primers are often used in applications where the joint is likely to be subjected to prolonged standing water (such as in concrete sidewalks).
A material used prior to color painting the damaged area. It promotes the adhesion of the basecoat paint. Wet sanding the primer is required prior to painting with a colored coat. The primer is usually colored gray, but can be tinted. This primer also acts as a sealer on the metal.
A type of paint which has little color content but which helps the bonding process between metal and color coats. rimer/Sealer: An undercoat which improves adhesion of the topcoat and/or seals the surface so that the paint isn't absorbed. Paint is usually applied to the sealer without the need for sanding as long as it is applied within the time window prescribed by the sealer/paint manufacturer.
See also gesso. Lately the art magazines have been making a big deal over the fact that "primer" and "gesso" are not the same thing; primer is usually acrylic based. However, they accomplish the same thing: it seals the support (usually canvas or board) from the pigment, and gives the surface more "tooth," which means the pigment will adhere better to the support (instead of peeling off later.)
An undercoat or chemical applied to a surface to improve the adhesion, durability, and appearance of a topcoat or the bond of an adhesive. A product (chemical) used to prepare metal bonding areas and ensure a strong bond between the glass part and the adhesive.
Primer is the undercoating most modelers use prior to painting with their color of choice. Primer helps smooth out minor imperfections and scratches and also seals the surface of the model so that paints, such as lacquer, won't damage it. Primer also helps the finish coats of paint adhere more firmly. When a model is made with a colored plastic, especially red or yellow, primer is essential to prevent bleed-through.
The first complete coat of paint applied in a painting system. Many primers are designed to provide adequate adhesion between the surface and subsequent topcoats. Most primers contain some pigment, some lend uniformity to the topcoat, some inhibit corrosion of the substrate, and some stop the discoloration of the topcoat.
(paint) This is the first coat of paint that is applied to a raw (unpainted) surface. This is used to â€œstickâ€ to the substrate and provide adhesion for the remaining coats of paint. It provides a smooth stable surface for the following coats and prevents corrosion and chemical attack of the substrate. There are numerous types of primers that are selected to suit the substrate and surface conditions.
First complete coat of paint of a painting system applied to a surface. Such paints are designed to provide adequate adhesion to new surfaces or are formulated to meet the special requirements of the surfaces.
The first layer of a coating system. Applied to an unpainted surface. Its' role is to protect the substrate and to prepare it for the application of a surfacer or topcoat. It must therefore have above all, excellent adhesion to the substrate and to the coating which will follow.
A coat of paint, usually sprayed on, that serves as the foundation for all coats of paint to follow. For resin and vinyl kits, a laquer-based spray primer is recommended, as it provides good "tooth" for subsequent coats of paint. Primer should be applied in light puffs, and should be allowed to dry for 24 hours before any further paint is applied. A popular brand of primer among garage kit enthusiasts is Floquil spray primer.
A coating which ensures adhesion between the substrate and the remainder of the coating system. Often used on metals, where it may be formulated to give improved corrosion protection, and on wood, prior to the application of pigmented coatings.
An essential undercoat layer of paint. Primer kills stains, retards moisture absorption and provides a good surface for a top coat of paint to adhere to. Primer comes in water- and oil-based formulas. It is imperative that new or bare wood, and metal, be primed.
A coating applied to a surface, before the application of an adhesive, lacquer, enamel, etc., to improve the adhesion performance or load carrying ability of the bond. Some primers contain a corrosion inhibitor.
A material of relatively thin consistency applied to a surface for the purpose of creating a more secure bonding surface and to form a barrier to prevent migration of components. The first coat of paint in a paint job that consists of two or more coats. Also, the paint used for such a first coat.
Primer is a preparatory coating put on materials before painting. Priming ensures better adhesion of paint to the surface, increases paint durability, and provides additional protection for the material being painted.
(n.) That part of a cartridge which is struck by the gun's firing pin, detonates, and thus ignites the powder charge. There are two main types of priming systems currently in use -- rimfire and centerfire. In a rimfire cartridge, e.g. .22s, the priming compound is contained in the hollow rim. In a centerfire primer, the compound is in a small metal cup inserted into the base of the cartridge case. There are two types of centerfire primers. The first, or Boxer primer, is made up of the cup and the anvil, and the priming compound sandwiched between the two. The other, or Berdan, omits the anvil from the primer, instead, it is integral with the cartridge case.
A small metal cup holding priming compound to ignite and flame through the flash hole, igniting the main charge when struck by the firing pin. In a "Centrefire" cartridge this primer is located in the centre of the cartridge head hence the name.
A tiny quantity of explosive compound that detonates when struck with force. It ignites the gunpowder. In centerfire ammunition, the primer is located in the center of the base, and is in a tiny metal cup. In rimfire ammunition, the primer is distributed evenly around the inside of the bottom rim of the case.
The device that detonates when struck, igniting the propellant charge of a cartridge. In centre fire fixed ammunition the primer occurs as a cap like attachment to the cartridge base. Originally the primer contained chlorate or a fulminate, though compounds having guanyl as a base are currently employed. Initially the primer was separate to the cartridge and called a percussion cap, it consisted of a metal cup holding the explosive and weatherproofed on its open end. This cup was placed on a percussion weapons cone or nipple with the open end down. The hammer's blow detonated the primer and this in turn ignited the propellant charge through the ignition vent.
Also called "cap", deriving from "percussion cap" which is the priming form used with some muzzle loading arms. In a centerfire cartridge the small metal cup containing a detonating mixture is used to ignite the propellant powder.
An explosive compound fitted either all around the rim of a rimfire cartridge case, or in a centrally mounted cap (usually replaceable) for centre fire cartridges. It is used to set off the main charge, OR, The small charge of fine grained Black Powder used to ignite the main charge of a Matchlock, Wheel Lock or Flintlock gun.
Also called "cap", deriving from the percussion caps used with some muzzle-loading arms. In a centerfire cartridge, the small metal cup contains a detonating mixture which is used to ignite the propellant powder. The primer is seated in the primer pocket in the base of the cartridge case. The standard American type of primer, the "Boxer," also contains an anvil. Electrically fired primers are used in some military weapons and in some experimental European sporting arms. In a rimfire cartridge the priming mixture is contained within the rim of the case. See anvil, Berdan, and battery cup.
a beginning book for the teaching of reading; specifically, the first formal textbook in a basal reading program, usually preceded by a readiness book and one or more preprimers. an easy-to-read, introductory book on any subject.
an introductory text that eases you into a topic by outlining the issues, walking you through the steps of the new process, and giving you the vocabulary you need to understand more advanced material on your topic
Primer is an early home video documenting the hard rock band Living Colour and the making of its platinum selling album Vivid. The video includes a collection of songs from Vivid and observations on the songs from band members. The live track "Broken Hearts" was filmed by MTV during a 1988 concert at Auburn University in Alabama.
Primers are usually made with 100% pure methacrylic acid. Although primers are caustic to skin, they are not caustic to the nail plate. Primers aid in product retention because one end of the molecular chain is attracted to the oil molecule in the natural nail plate, and the other end is attracted to the monomer molecule. Primers act like double-sided sticky tape.