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	Reactant (Site not responding. Last check: 2007-10-08)
		In chemistry, the reactants are the substances that exist at the start of a chemical reaction.
		In a chemical equation, the reactant is placed to the left of the arrow : Reactant(s) → Product(s)
		A limiting reactant is a chemical that stoichiometrically limits the amount of products that can be formed.
	www.serebella.com /encyclopedia/article-Reactant.html (145 words)

	Reactant gas ejector head and thin-film vapor deposition apparatus - Patent 5728223
		The reactant gases, i.e., the material gas and the oxidizer gas, are introduced from respective sources through the gas supply pipes 24a, 24b and the inlet passages 21a, 21b, and ejected at predetermined rates into the gas mixing chamber 26.
		The reactant gases ejected from the reactant gas ejector head 5 have already been forcibly mixed with each other in the gas mixing chamber 26, and are flow-rectified by the nozzle 29, and then applied as a uniform downflow to the substrate 11 on the substrate stage 7.
		In the reactant gas ejector head 5 according to the fourth embodiment, the material and oxidizer gases supplied from the gas supply pipes 24a, 24b are introduced through the distribution passages 38, 39 and the through holes 40, 41 into the gas mixing chambers 35, in which the material and oxidizer gases are mixed together.
	www.freepatentsonline.com /5728223.html (5301 words)

	Reactant: Just the facts... (Site not responding. Last check: 2007-10-08)
		In chemistry (The science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions), the reactants are the substances that exist at the start of a chemical reaction ((chemistry) a process in which one or more substances are changed into others).
		In a chemical equation (additional info and facts about chemical equation), the reactant is placed to the left of the arrow (A projectile with a straight thin shaft and an arrowhead on one end and stabilizing vanes on the other; intended to be shot from a bow) :
		A limiting reactant (additional info and facts about limiting reactant) is a chemical (Produced by or used in a reaction involving changes in atoms or molecules) that stoichiometrically (additional info and facts about stoichiometrically) limits the amount of products that can be formed.
	www.absoluteastronomy.com /encyclopedia/r/re/reactant.htm (166 words)

	Reactant - Wikipedia, the free encyclopedia
		A reactant or reagent is any substance initially present in a chemical reaction.
		These reactants react with each other to form the products of a chemical reaction.
		In a chemical equation the Reactants are the elements or compounds on the left hand side of the reaction equation.
	www.wikipedia.org /wiki/Reactant (98 words)

	Limiting Reactant (Site not responding. Last check: 2007-10-08)
		This is an illustration of the concept of limiting reactant using a simple prop.
		Point out that we have tacitly assumed that there was enough of each reactant to allow complete consumption of all substances.
		You could then pursue the idea by computing the amount of CO (g) formed in both scenarios and discussing the fact that it is the limiting reactant, the substance in short supply, that determines the amount of product formed.
	quiz2.chem.arizona.edu /preproom/Demo%20Files/limiting_reactant.htm (247 words)

	It's Never Too Late for Inherent Safety
		Reactant A is dissolved in Solvent S in Weigh Tank A, and the solution is then fed to the reactor.
		Reactant B, the limiting reagent, is then gradually fed to the reactor by gravity addition from Weigh Tank B, which has been pre-charged with the proper amount of Reactant B. The feed rate of Reactant B is controlled by the batch temperature.
		Reactant B is charged to the feed tank through a three-way valve to the bottom of the feed tank in the revised system.
	home.att.net /~d.c.hendershot/papers/nev2late/inhersaf.htm (3468 words)

	what is a reactant? (Site not responding. Last check: 2007-10-08)
		Sufficient heat is transferred to the reactant gas so that the reactant gas temperature is raised to that required to entrain all of the steam being generated.
		The reactant that is completely consumed in a chemical reaction is called the limiting reactant (or limiting reagent) because it determines (or limits) the amount of product formed.
		Reactant propellant usage is the amount of reactant used to power the pump compared to the amount of propellant used to power the pump.
	answerbus.coli.uni-sb.de /cgi-bin/answerbus/answer.cgi?what%2Bis%2Ba%2Breactant%3F (227 words)

	Method and apparatus for direct oxygen injection with a reactant stream into a fluidized bed reactor - US Patent 6156921 (Site not responding. Last check: 2007-10-08)
		This invention relates to a method and apparatus for entraining an oxygen-bearing gas in a reactant stream which is fed to a fluidized bed reactor and, more particularly, for injection of oxygen into a reactant feed stream to a fluidized bed reactor that is employed in an acrylonitrile synthesis process.
		To prevent the reactant feed from diffusing into sparger 26, it is preferred that a minimum pressure drop across each jet 60 be at least 1 psi and preferably 10 psi.
		While not as preferred, inert gases may be added to either the oxygen or the reactant feed streams to lower the upper fire limit and thus increase the maximum concentration of oxygen allowed in the feed stream.
	www.patentstorm.us /patents/6156921.html (3463 words)

	Chemical reaction
		In an oxidation-reduction reaction (also known as a redox reaction), one reactant loses electrons (that is, it is oxidized), and the other reactant gains electrons (it is reduced).
		The oxidized reactant is the reducing agent and the reduced reactant is the oxidizing agent.
		This is referred to as ΔH, where Δ (Delta) means difference, and H stands for enthalpy, a measure of energy which is equal to the heat transferred at constant pressure.
	www.sciencedaily.com /encyclopedia/chemical_reaction (704 words)

	ELECTRICAL POWER SYSTEM
		The PRSD subsystem stores the reactants (cryogenic hydrogen and oxygen) and supplies them to the three fuel cell power plants, which generate all the electrical power for the vehicle during all mission phases.
		The three fuel cell power plants are individually coupled to the reactant (hydrogen and oxygen) distribution subsystem, the heat rejection subsystem, the potable water storage subsystem and the EPDC subsystem.
		Reactant consumption is directly related to the electrical current produced: if there are no internal or external loads on the fuel cell, no reactants will be used.
	science.ksc.nasa.gov /shuttle/technology/sts-newsref/sts-eps.html (10408 words)

	Overmaat -- In een chemische reactie is een reactant in overmaat aanwezig al... (Site not responding. Last check: 2007-10-08)
		In een chemische reactie is een reactant in overmaat aanwezig als voor het verlopen van de reactie de hoeveelheid niet beperkend is. Zelfs als de reactie helemaal verlopen is, resteert er van een reactant die in overmaat aanwezig was nog een hoeveelheid.
		Een overmaat van een reactant kan worden gebruikt om een chemisch evenwicht te laten aflopen: doordat de concentratie van de reactant in overmaat ook na de reactie hoog blijft, wordt het evenwicht naar de kant van de reactieproducten gedwongen.
		Een reactant die in overmaat aanwezig is vormt daardoor niet de beperkende factor voor de reactie.
	overmaat.nl.tracking24.net (201 words)

	stochiometry limiting reactant (Site not responding. Last check: 2007-10-08)
		The excess reactant remains because there is nothing with which it can react.
		Likewise with chemistry, if there is only a certain amount of one reactant available for a reaction, the reaction must stop when that reactant is consumed whether or not the other reactant has been used up.
		To find the amount of excess reactant remaining, subtract the amount that reacted from the amount in the original sample.
	www.chem.tamu.edu /class/majors/tutorialnotefiles/limiting.htm (274 words)

	Protocols > Determining Cross Reactivity > Technical Support > Assay Designs (Site not responding. Last check: 2007-10-08)
		Also, make sure the first cross reactant is no higher than 25% ethanol (if the cross reactant is provided in an ethanolic liquid).
		Once the standards for the assay and the cross reactants have been made, the assay can be run as directed in the associated kit insert.
		After the blanks have been subtracted, determine the average of all the duplicates for the standards and the dilutions of the cross reactant.
	www.assaydesigns.com /technical/protocols_crossreact.htm (342 words)

	Reactant (Site not responding. Last check: 2007-10-08)
		In chemistry, the reactants are the substances that exist atthe start of a chemical reaction.
		During the course of areaction, the reactants form one or more products.
		In a chemical equation, the reactant is placed to the left of the arrow :
	www.therfcc.org /reactant-105385.html (76 words)

	Duran: Chapter Four text (Site not responding. Last check: 2007-10-08)
		In this case, solvent disperses reactant (the solute) allowing for a better control of reactivity as the reactant molecules are separated from each other.
		A straightforward manner to determine the limiting reagent is to work through the equation reactant by reactant using the given amount of one reactant and assume all others are in excess (that is, there is more than enough to react with all of the given reactant).
		By this method if all reactants lead to the same amount of products, they are in perfect stoichiometry (like the reactant ratios in the balanced chemical equation) and there is no limiting reagent.
	www.chem.ufl.edu /~chm2040/Notes/Chapter_4/text.html (948 words)

	Method of preparing pyrrolotriazin-4-one compound and method of preparing isothiocyanatoformic acid ester derivative ... (Site not responding. Last check: 2007-10-08)
		The isothiocyanatoformic acid ester derivative is preferably used as a reactant in the preparation of the pyrrolotriazinone compound.
		The addition step is a step of reacting the aminopyrrole derivative represented by the general formula (1) with the reactant represented by the general formula (2) to form the adduct represented by the general formula (3).
		In the addition step, an amount (mol) of the reactant represented by the general formula (2) is preferably 1.0-5.0 times, and more preferably 1.0-2.0 times, an amount of the aminopyrrole derivative represented by the general formula (1).
	www.patentstorm.us /patents/6600041.html (6464 words)

	General Chemistry Online: Glossary: (Site not responding. Last check: 2007-10-08)
		with the concentrations of reactants, catalysts, and inhibitors.
		A reaction rate is the speed at which reactants are converted into products in a chemical reaction.
		The reaction rate is given as the instantaneous rate of change for any reactant or product, and is usually written as a derivative (e.
	antoine.frostburg.edu /chem/senese/101/glossary/r.shtml (838 words)

	GAPHYOR on-line Help (Site not responding. Last check: 2007-10-08)
		In previous versions (earlier than 3.1) when specifying a reactant, one was obliged to give a formula.
		Note : when specifying a reactant, don't forget that by default, the system search molecules in ground state : no ionization and no "strong" excitation.
		If every elements in a reactant is in the process, not every element of the process will be in the molecule.
	gaphyor.lpgp.u-psud.fr /gaphyor/help2.html (432 words)

	[No title]
		The reactant gas is introduced at the bottom of a water reservoir through a frit or diffuser.
		As the reactant gas bubbles to the top, it reaches thermal equilibrium with the water reservoir and absorbs water from the reservoir.
		In a steam injection humidifier, the water is flash evaporated on a dry surface an the resulting steam engaged with the reactant gas.
	www.fideris.com /DesktopDefault.aspx?tabid=2615 (360 words)

	Duran: Chapter Four Stoichiometry (Site not responding. Last check: 2007-10-08)
		When there is too much of one reactant to react completely with a given amount of a second reactant, the first reactant is said to be "in an excess".
		When there is too little of a reactant to react completely with a given amount of a second reactant, the first reactant is said to be a "limiting reagent".
		When both reactants are completely consumed the reactants are said to be in "stoichiometric proportions"
	www.chem.ufl.edu /~chm2040/Notes/Chapter_4/stoichiometry.html (87 words)

	what is impendance and reactant in the context...
		what is impendance and reactant in the context...
		28 Sep 2004 7:30 what is impendance and reactant in the context...
		Both are something real/imaginary properties whos magnitude changes due to material properties, geometrics of structure and to the depedence of frequency of sinusiod.
	www.edaboard.com /viewtopic.php?p=338625#338625 (89 words)

	Sample Problem (Site not responding. Last check: 2007-10-08)
		To determine whether this reaction is balanced you must first determine how many atoms of each type are on the reactant side (left-hand side) of the equation and how many atoms of each type are on the product side (right-hand side).
		In this example, you have two blue nitrogen atoms and two gray hydrogen atoms on the reactant side but only one nitrogen atom and three hydrogen atoms on the product side.
		For the purpose of balancing the equation we are not concerned what molecules these atoms are in, just the number of atoms of each type.
	newtraditions.chem.wisc.edu /FPTS/fbeqns/eqnsprf.htm (298 words)

	BBC - GCSE Bitesize - Chemistry \| Chemical reactions \| Collisions and reactions
		concentration of a dissolved reactant is increased, or the pressure of a reacting gas is increased, there are more reactant particles in the same volume.
		If a solid reactant is broken into small pieces or ground into a powder, its surface area is increased.
		A reactant is a substance put together with another substance/substances to undergo a chemical reaction.
	www.bbc.co.uk /schools/gcsebitesize/chemistry/chemicalreactions/4ratesofreactionrev4.shtml (345 words)

	Fuel cell membrane electrode assemblies with improved power outputs and poison resistance - Patent 6300000
		Because the fuel cell is often operated with use of gaseous reactants, typical electrodes are porous materials (or more generally, reactant diffusive materials) having the catalytically active metal at or within the porous surfaces.
		The reactant diffusive, electronically conductive electrodes, including cathode and anode, can be prefabricated before they are contacted with the tonically conductive membrane or subjected to the deposition of the second catalytically active metal.
		The reactant flow was set to 2/3.5 times the stoichiometric value, for hydrogen and air respectively, and the stoichiometric flow was maintained throughout the polarization curve.
	www.freepatentsonline.com /6300000.html (18717 words)

	Wrap-Up
		In this lesson, we studied the stoichiometry of chemical reactions, that is, the relationships between the amounts of the various chemical reactants and products that are involved in chemical reactions.
		It is the reactant that is used up - the limiting reactant - that determines when the reaction ends and the amount of each product that is formed.
		We learned how to determined which reactant will be limiting, how much product will be formed, and how much of each excess reactant will be left over.
	dl.clackamas.cc.or.us /ch104-02/wrap-up.htm (411 words)

	Induction of the acute-phase reactant, alpha 1-acid glycoprotein, by glucocorticoids in rat hepatoma cells. (Site not responding. Last check: 2007-10-08)
		Induction of the acute-phase reactant, alpha 1-acid glycoprotein, by glucocorticoids in rat hepatoma cells.
		Induction of the acute-phase reactant, alpha 1-acid glycoprotein, by glucocorticoids in rat hepatoma cells.The amount of alpha 1-AGP-specific mRNA in HTC cells is greatly increased (at least 100-fold) in response to glucocorticoids.
		The new steady-state level of RNA is approached with a t 1/2 of about 8 hr and the RNA consists of a single species of approximately 850 bases.
	www.pdg.cnb.uam.es /UniPub/iHOP/gp/4438292.html (195 words)

	U3FAQ's
		To find the limiting reactant requires you to compare the actual mole ratio of the two reactants to the stoichiometric factor for the same reactants where the actual mole ratio and the stoichiometric factor are compared with the same substances in the numerator and denominator, respectively.
		If the problem you are working only asks you to find the limiting reactant, you are done, In most cases the question continues and wants you to calculate the expected (theoretical) yield of one of the products based on the complete reaction of the limiting reactant.
		For some reason, many students are successful in finding the limiting reactant, but fail to use it properly in calculations involving it.
	www.csubak.edu /~mdutton/u3faqs.html (1107 words)

	Find out the effect heating a reactant has on the speed of reaction.
		Below is a short sample of the essay "Find out the effect heating a reactant has on the speed of reaction.".
		In my prediction I said that "I believe that by heating up a reactant, the reaction will be faster to complete." I was right in my prediction in saying this.
		The results and graph clearly show that when you heat a reactant, the reaction is faster.
	www.coursework.info /i/9977.html (484 words)

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