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Topic: Hydrolysis reaction

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Aluminum chloride

Phosphorus trichloride

Phosphorus pentachloride

	Hydrolysis - Wikipedia, the free encyclopedia
		Hydrolysis is a chemical reaction or process in which a molecule is split into two parts by reacting with a molecule of water, which has the chemical formula H
		With acid-catalysed hydrolysis a dilute acid is used to protonate the carbonyl group in order to activate it towards nucleophilic attack by a water molecule.
		An important example of this reaction is the release of fatty acids from glycerol in triglyceride hydrolysis, as occurs during saponification.
	en.wikipedia.org /wiki/Hydrolysis (659 words)

	Hydrolysis Information Center - milk protein hydrolysis
		Hydrolysis is a chemical process in which a molecule definition of hydrolysis gelatin hydrolysis test is cleaved into propylene imine hydrolysis two parts by the addition of a molecule of water.
		The fragment of the parent molecule that was originally hydrolysis hydrocarbon a carboxylate hydrolysis of enterococcus faecalis starch hydrolysis test atp gains a hydrogen mechanism hydrolysis of ethylene oxide ion from the additional water molecule.
		Hydrolysis can be considered as the opposite of condensation, base hydrolysis in which two fragments are joined data matrix for starch water hydrolysis hydrolysis of bacteria lactic acid glucosamine hydrolysis for each water molecule produced.
	www.scipeeps.com /Sci-Chemistry_Topics_He_-_I/Hydrolysis.html (476 words)

	Encyclopedia :: encyclopedia : Hydrolysis (Site not responding. Last check: 2007-10-24)
		Hydrolysis is a chemical process in which a molecule is cleaved into two parts by the addition of a molecule of water.
		In other hydrolysis reactions, such as hydrolysing the peptide links of amino acids, only the carboxylic acid product has a hydroxide group derived from the water.
		Hydrolysis can be considered as the opposite of condensation, in which two fragments are joined for each water molecule produced.
	www.hallencyclopedia.com /Hydrolysis (362 words)

	Hydrolysis reactor for removal of urea, ammonia and carbon dioxide from a liquid phase comprising urea in aqueous ... (Site not responding. Last check: 2007-10-24)
		Advantageously, in the hydrolysis reactor according to the present invention, the reaction space in the shell is appropriately divided by a dividing baffle in a first and a second reaction space each of which is fed with a respective gaseous phase portion comprising steam.
		Another advantage of the hydrolysis reactor which is the object of the present invention lies in the fact that, for equal residual urea concentration contained in the outlet liquid phase, the residence time of the liquid phase in the reactor is significantly lower than the residence time in the prior art reactors.
		In this first reaction space, the concentration of urea in the liquid phase fed to the reactor is advantageously lowered to a value generally comprised between 40 ppm and 50 ppm.
	www.freepatentsonline.com /6334984.html (4490 words)

	Center for Green Chemistry and Technology: Purpose
		A strategy to effecting ether hydrolysis therefore is to target nucleophilic attack at this carbon center in conjunction with increasing the electrophilicity at this carbon by coordinating a metal cation to the ether oxygen.
		The hydrolysis of the carbon-oxygen bond in ethers is induced by molybdate as nucleophile, or by aluminum phosphate in combination with ultrasound.
		The mechanism of the hydrolysis of epoxides is proposed to involve the formation of a macrocycle that undergoes subsequent hydrolysis to the diol [8].
	www.orgs.ttu.edu /greenchemistry/research (4923 words)

	Hydrolysis/Buffers
		Hydrolysis can also occur when the salt of a strong acid and a weak base such as ammonium chloride is dissolved in water.
		Hydrolysis of the acetate ion involves a competition for the proton from water by the two bases CH and OH The position of equilibrium depends upon the relative values of the constants Kw and Ka:
		The percent of hydrolysis is an indication of the relative strength of the two acids or bases involved in the hydrolysis reaction.
	www.sonoma.edu /people/b/brooks/115b/hydrol.html (1085 words)

	Biochemistry (Site not responding. Last check: 2007-10-24)
		Reaction (i) is an exchange, irreversible reaction (note that ATP is hydrolyzed) that is catalyzed by the enzyme hexokinase.
		Reaction (ii) is a reversible reaction catalyzed by the enzyme phosphoglucose isomerase.
		Reaction (iii) is another exchange, irreversible reaction (again, note that ATP is hydrolyzed) that is catalyzed by the enzyme phosphofructose kinase.
	www.mansfield.ohio-state.edu /~sabedon/biol1020.htm (2119 words)

	Hydrolysis of Ions
		Reaction 2 is a hydrolysis reaction in which ammonium ions react with water to yield hydronium ions, H
		Reaction 3 is reactant driven and the equilibrium constant is exceedingly small.
		The equilibrium constant for this reaction indicates that the reaction will occur to a significant extent and the net effect is to raise the [OH-] and to increase the pH of the solution.
	www.cofc.edu /genchemlab/hydrolysis.htm (1040 words)

	Hydrolysis
		This is distinct from a hydration reaction, in which water molecules are added to a substance, but no covalent bonds are broken.
		One fragment of the parent molecule gains a hydrogen ion from the additional water molecule.
		In other hydrolysis reactions such as hydrolysing the peptide links of amino acids only one of the products, the carboxylic acid product, has a hydroxide group derived from the water.
	www.knowledgefun.com /book/h/hy/hydrolysis.html (316 words)

	Salt Hydrolysis - Title
		Hydrolysis is simply the reaction of a substance, in this case an ion or ions, with water.
		The ionization of a weak acid or a weak base in water is a hydrolysis reaction.
		This reaction is an hydrolysis, we called this reaction, the ionization of acetic acid, but in essence it is due to the reaction of the acid with water, which is acting as a base.
	www.chemistry.nmsu.edu /studntres/chem112.spring.1997/Hydrolysis.html (927 words)

	Types of Reactions, Definitions and Examples
		A reaction where water is one of the reactants, and a larger molecule is split into two smaller molecules, one of which has the hydrogen from the water and the other has the OH group from the water.
		Hydrolysis is actually a special type of substitution reaction.
		CH This example is the reverse of the earlier esterification reaction, and is usually carried out in the presence of potassium or sodium hydroxide, which then react with the acid formed to give the salt of the acid.
	www.sky-web.net /science/reaction-types.htm (1135 words)

	Effects of Environmental Factors on 1,3-Dichloropropene Hydrolysis in Water and Soil -- Guo et al. 33 (2): 612 -- ...
		Hydrolysis of 1,3-D in soil was examined on the basis of Cl release from fumigated sterile Arlington sandy loam.
		Hydrolysis of 1,3-D in soil was determined from Cl release.
		Hydrolysis of cis- and trans-1,3-dichloropropene in wet soil.
	jeq.scijournals.org /cgi/content/full/33/2/612 (4240 words)

	Hydrolysis
		The hydrolysis of poly-halogenoalkanes does not involve a simple extension of this reaction.
		The overall reaction of trichloromethane with hydroxide ions is therefore
		The energy barrier to reaction is thus much larger than in the case of chloromethane with its small hydrogen atoms.
	www.rod.beavon.clara.net /hydrolys.htm (498 words)

	Answers to the Halo Challenge Questions
		By definition, a reaction between an acid and a carbonate is an acid-base exchange reaction (with gas).
		In an acid-base reaction, the weakest acid and base are those on the side of the reaction where equilibrium lies, and thus the strongest acid and base lie on the opposite side of the equilibrium.
		In a hydrolysis reaction the acid dissociation constant Ka is equal to the equilibrium constant Keq.
	www.cs.utexas.edu /users/kbarker/halo/finalanswers.html (16923 words)

	Hydrolysis (Site not responding. Last check: 2007-10-24)
		The hydrolysis reaction is often an unwanted side reaction and requires anhydrous solvents and exclusion of water from a reaction.
		Acid catalyzed hydrolysis of esters is the reverse of the Fischer esterification.
		Amides are the least reactive of the acid derivatives and hydrolysis requires acids or bases and vigorous reaction conditions.
	people.uis.edu /gtram1/organic/carboxylicAcids/hydrolysis.htm (290 words)

	Mauritz - Sol Gel Research
		With the presence of this homogenizing agent, alcohol, hydrolysis is facilitated 16 due to the miscibility of the alkoxide and water.
		It should be emphasized, however, that the addition of solvents and certain reaction conditions may promote esterification and depolymerization reactions according to the reverse of equations (2), (3), and (4).
		Nonetheless, the most obvious effect of the increased value of R is the acceleration of the hydrolysis reaction.
	www.psrc.usm.edu /mauritz/solgel.html (2637 words)

	Condensation/Hydrolysis (Site not responding. Last check: 2007-10-24)
		A condensation reaction is responsible for building large molecules.
		An enzyme catalyzes the reaction between alcohol groups on adjacent monomer units (eg.
		A hydrolysis reaction is responsible for breaking down large molecules (eg.
	www.tvdsb.on.ca /westmin/science/sbioac/biochem/condense.htm (68 words)

	Enhancement of hydrolytic activity of sphingolipid ceramide N-deacylase in the aqueous-organic biphasic system -- ...
		hydrolysis reaction by accumulation of fatty acids in the reaction
		Hydrolysis of GM1 was maximum in the presence of 0.8% TDC
		C-glycosphingolipids by reverse hydrolysis reaction of sphingolipid ceramide N-deacylase: detection of endoglycoceramidase activity in a seaflower.
	www.jlr.org /cgi/content/full/41/5/846 (2502 words)

	Ch 206 Lab Help
		A hydrolysis reaction occurs when an ion reacts with water to produce H
		The equilibrium constant for this reaction is termed a K
		Write the hydrolysis reaction responsible for the basic pH, and calculate the equilibrium constant.
	www.sou.edu /chem/ch206sp01/hydhelp.htm (759 words)

	ATP Hydrolysis and AMP Kinase Activities of Nonstructural Protein 2C of Human Parechovirus 1 -- Samuilova et al. 80 ...
		GST-2C was incubated with radiolabeled ATP in the reaction buffer containing 4 µM cold ATP at 37°C for 30 min.
		to ADP and AMP by hydrolysis of the ß-
		are catalytic constants of the hydrolysis reaction for ATP and ADP, respectively.
	jvi.asm.org /cgi/content/full/80/2/1053 (3280 words)

	hydrolysis of esters
		The alkaline hydrolysis of esters actually involves reaction with hydroxide ions, but the overall result is so similar that it is lumped together with the other two.
		The reaction with pure water is so slow that it is never used.
		The reaction is catalysed by dilute acid, and so the ester is heated under reflux with a dilute acid like dilute hydrochloric acid or dilute sulphuric acid.
	www.chemguide.co.uk /organicprops/esters/hydrolysis.html (680 words)

	Active site constraints in the hydrolysis reaction catalyzed by bacterial RNase P: analysis of precursor tRNAs with a ...
		Assignment of nucleotides to P1 hydrolysis bands is shown in the right margin; products corresponding to alkaline hydrolysis and RNase T1 cleavage at the 3'-side of the inosine residue at position 7 are indicated on the left.
		Hydrolysis products were analyzed on 25% polyacrylamide–8 M urea sequencing gels in the presence of 10 mM DTT (for further details see Materials and Methods).
		introns and the hydrolysis reaction catalyzed by bacterial RNase
	nar.oxfordjournals.org /cgi/content/full/28/3/720 (4744 words)

	Guanosine triphosphatase stimulation of oncogenic Ras mutants -- Ahmadian et al. 96 (12): 7065 -- Proceedings of the ...
		(a) Single turnover hydrolysis of 150 µM wild-type Ras (closed symbols) and A61Ras (open symbols) with 140 µM of either GTP (triangles) or DABP-GTP (circles) was measured in standard buffer at 30°C. Aliquots of the reaction mixture at the indicated time points were analyzed by HPLC as described in Materials and Methods.
		HPLC and fluorescence measurements of the hydrolysis reaction of GTP and DABP-GTP by oncogenic Ras.
		The reaction was monitored by the fluorescence increase as before.
	www.pnas.org /cgi/content/full/96/12/7065 (3947 words)

	Ch 229 Lab Help (Site not responding. Last check: 2007-10-24)
		In this experiment, you will use both indicators and pH meters (note the change in procedure!) to study hydrolysis reactions of various salts.
		The trick here is to be able to figure out which species is hydrolyzing producing the hydronium or hydroxide ions which are making the solution acidic or basic.
		It is merely a salt ionizing in solution, and we now must look at the acid-base properties of the ions based on conjugate acid/base pair strength.
	darkwing.uoregon.edu /~genchem/sum99/ch229/hydhelp.htm (924 words)

	Search results for 'hydrolysis'
		Reaction mechanisms * What is the mechanism of the reaction between iodide ion and hydrogen peroxide?
		The pK b of an base is minus the base-10 log of its base hydrolysis constant *, pK b = - log K b.
		Consider the hydrolysis of acetate to form acetic acid and hydroxide ions: CH 3COO - + H 2O = CH 3COOH + OH - All of the acetic acid you added after the titration will
	marie.frostburg.edu /cgi-bin/htsearch?config=htdig&restrict=101&exclude=print-&method=and&format=builtin-long&sort=score&words=hydrolysis (555 words)

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