
	Where results make sense

Topic: Autocatalysis

Related Topics

Tin pest

Ribozyme

Gippsland Grammar

42nd Street (film)

Purine

CLT

GloFish

Petroleum

Zhongyuan Institute of Technology

Strix mortar round

Qibya massacre

Kaisou District, Wakayama

Auburn, Iowa

Sneedville, Tennessee

CICA

	Pattee Festschrift paper
		The role of autocatalysis in both the replication of genetic information and the maintenance of operational functions will be emphasised, illustrating that there is no solely physical basis for the separation of information and function.
		In its simplest manifestation, autocatalysis is the mechanism of macromolecular replication.
		Indeed, when the synthetic operations required for autocatalysis are conditionally dependent on an ordered set of molecular features, as in the case of assignment catalysts for the formation of linear polymers, the selection of a self-constructing set of catalysts corresponds to the emergence of a code.
	www.phy.auckland.ac.nz /staff/prw/Recent_Work/Scientific_Papers/Pattee.html (4364 words)

	AUTOCATALYSIS (Site not responding. Last check: 2007-11-04)
		A process during which the probability of occurrence of some property, event or object increases as a function of the number of such properties, events or objects already present system.
		Autocatalysis is not to be confused with multiplication through production including self-reproduction in which the growth of a population is an aggregate property (see aggregation) of the productive capability of its individual members.
		In autocatalysis, properties, events or objects serve as their own catalysts and are "self-breeding" so to speak.
	pespmc1.vub.ac.be /ASC/AUTOCATALYS.html (100 words)

	Artificial Life Lecture 17 (Site not responding. Last check: 2007-11-04)
		But some enzymes have a further property of, in the right conditions, catalysing their own formation -- this is autocatalysis, and is in some sense the most basic form of reproduction.
		Autocatalysis: the product of a reaction is also a catalyst for the same reaction.
		You cannot have evolution without reproduction, so understanding autocatalysis looks like an essential for understanding the origin of life.
	www.cogs.susx.ac.uk /users/inmanh/easy/alife03/lec17/lec17_files/slide0021.htm (64 words)

	Commercial NOxTECH Demonstration in a Coal-Fired Utility Boiler
		The gas-phase autocatalysis is self-sustained by autothermal combustion, so NOxTECH is not affected by contaminants which poison, foul, and plug catalysts.
		Autocatalysis is self-sustained in the gas-phase by fuel injection.
		The fuel Injection regenerates autocatalysis continuously, so performance is self-sustained and does not depend on solid catalytic surfaces which plug, foul, and poison.
	www.noxtech.com /pages/enginepaperland1.html (3204 words)

	Some Remarks on Autocatalysis and Autopoiesis
		The notions of collective autocatalysis and of autopoiesis are clearly related; equally clearly, they are not quite the same.
		Specifically I suggest that autopoiesis can be at least roughly characterized as ``collective autocatalysis plus spatial individuation''.
		While some mechanism of spatial confinement or concentration is probably necessary to the effective operation of any collectively autocatalytic reaction network, autopoiesis requires, in addition, that the mechanism for maintaining this confinement should itself be a product of the reaction network--and should thus (?) be capable of separating or individuating otherwise identically organized networks.
	www.eeng.dcu.ie /~alife/bmcm9901/html-multi (135 words)

	CEPTUAL INSTITUTE: nuc_com002 (Oct 1997) Chaotic Autocatalysis
		Because catalysis is a reasonable and viable chemical process found in many metabolic reactions, autocatalysis appeared to these researchers to be a reasonable way to get over that wall of thermodynamic entropy.
		so that the autocatalysis is a local event loop still driven by larger energy flows, the fact remains that dynamically, we are still required to recognize some self referencing quality that keeps the bio-chemical reactions looped in consistently regenerating cycles.
		"Autocatalysis" is thus most probably an artifact or qualitative-describer of metabolic loops, rather than a singularly-actual function.
	www.ceptualinstitute.com /nuc/nuc_com002.htm (1455 words)

	Handout #1 (Site not responding. Last check: 2007-11-04)
		The industrial importance of autocatalysis (which occurs in a number of reactions, such as oxidations) is that the rate of the reaction can be maximized by ensuring that the optimum concentrations of reactant and product are always present.
		One consequence of autocatalysis is the possibility that the concentrations of reactants, intermediates, and products will vary periodically either in space or in time (Fig.
		It occurs slowly initially because [Y] is small, but autocatalysis leads to a surge of Y. This surge, though, removes X, and so reaction (a) slows, and less X is produced.
	www.jhu.edu /~chem/030204/handout1.html (1918 words)

	JAL -RESEARCH (Site not responding. Last check: 2007-11-04)
		I am working on the theory of systems of nonlinear parabolic differential equations (reaction-diffusion equations) which may be singular in the case of fractional order autocatalysis or contain convection terms (for example Ionic autocatalysis).
		Observations show that chemical systems for which autocatalysis forms a key step can support propagating chemical wavefronts, when the reaction mixture is unstirred.
		I am also interested in the application of the method of matched asymptotic expansions to develop a rational approach for determining the propagation speed (together with its correction) for the large -t (time) travelling wave structures which evolve in certain classes of scalar reaction-diffusion equations and systems of reaction-diffusion equations.
	www.rdg.ac.uk /AcaDepts/sm/wsm1/jal/research_R-D.html (194 words)

	Autocatalysis: Reaction of Permanganate with Oxalic Acid
		The other solution's reaction rate eventually increases as it forms manganese(II) ion, which subsequently autocatalyzes its own formation.
		Autocatalysis occurs when the product of a reaction serves as a catalyst for the reaction.
		The reaction in the beaker on the left eventually proceeded at a reasonably rapid rate.
	jchemed.chem.wisc.edu /JCESoft/CCA/CCA3/MAIN/AUTOCAT/PAGE1.HTM (312 words)

	Asymmetric autocatalysis and amplification of enantiomeric excess of a chiral molecule
		Asymmetric autocatalysis and amplification of enantiomeric excess of a chiral molecule
		proposed a reaction scheme by which a combination of autocatalysis and inhibition in a system of replicating chiral molecules can allow small random fluctuations in an initially racemic mixture to tip the balance to yield almost exclusively one enantiomer.
		When a 5-pyrimidyl alkanol with a small (2%) enantiomeric excess is treated with diisopropylzinc and pyrimidine-5-car-boxaldehyde, it undergoes an autocatalytic reaction to generate more of the alkanol.
	www.nature.com /nature/journal/v378/n6559/abs/378767a0.html (295 words)

	Protease Activity of in Vitro Transcribed and Translated Caenorhabditis elegans Cell Death Gene (ced-3) Product -- ...
		These cleavages occur between the Asp-X bonds, the primary substrate specificity of ICE itself, suggesting that conversion of p45 to its active heterodimeric form might be an autocatalytic event(17), that is, the result of the enzyme activity of ICE itself.
		To this end, we developed an assay to detect autocatalysis of in vitro translated Ced-3 protein and used this assay together with various substrate and inhibitor studies to demonstrate that Ced-3 is an Asp-dependent cysteine protease.
		That the inhibition profiles of ICE and Ced-3 are similar suggests that the catalytic specificities of the two proteins are similar and further supports the hypothesis that these proteins are functionally homologous.
	www.jbc.org /cgi/content/full/271/7/3517 (5259 words)

	Chapter 6, Physics and Process Philosophy, T (Site not responding. Last check: 2007-11-04)
		In the second case, the autocatalysis is starved by shortage of a necessary reactant.
		Any chemical oscillation that is based on cubic autocatalysis can be shown to correspond to one or the other of these two reaction types.
		Oscillations based on quadratic autocatalysis must involve three (or more) variables, usually including a 'feedback species,' generally called Y. Like reactions based on cubic autocatalysis, oscillations based on quadratic autocatalysis are reducible to only a few basic patterns.
	www.georgetown.edu /faculty/earleyj/constraints.htm (4354 words)

	Developmental Biology Online: Mathematical Background of Pattern Formation
		A characteristic feature of these models is that they consider autonomous growth (autocatalysis) coupled to dissipative processes, such as diffusion.
		Thus the mechanism underlying pattern formation should be similar to local autocatalysis with strong positive feedback and lateral inhibition.
		Other molecular realization of autocatalysis and lateral inhibition principle may be the processes in which the inhibition effect is realized by depletion of a substrate consumed in autocatalysis.
	www.devbio.com /printer.php?ch=1&id=4 (1418 words)

	Chemical kinetics - Wikipedia, the free encyclopedia
		A catalyst is a substance that accelerates the rate of a chemical reaction.
		In autocatalysis a reaction product is itself a catalyst for that reaction possibly leading to a chain reaction.
		Michaelis-Menten kinetics describe the rate of enzyme mediated reactions.
	en.wikipedia.org /wiki/Reaction_kinetics (1089 words)

	JAL -PUBLICATIONS
		The evolution of reaction-diffusion waves in a class of scalar reaction-diffusion equations: Initial data with compact support and exponential decay rates.
		Pattern formation in a simple chemical system with general orders of autocatalysis and decay.
		A note on the evolution of accelerating phase waves in a class of nonlinear diffusion equations.
	www.rdg.ac.uk /AcaDepts/sm/wsm1/jal/papers.html (302 words)

	TSRI - News and Publications
		When a molecule catalyzes its own formation, the reaction is termed autocatalysis; when molecular recognition is also involved, then the reaction is termed self-replication.
		Replication lies at the heart of prebiotic events on Earth, the events that gave birth to biology from chemistry.
		We encountered a new form of autocatalysis involving molecules within molecules: A reaction product accelerates its own formation, and it does so through molecular recognition.
	www.scripps.edu /news/sk/skaggs2001/sk02.html (633 words)

	[No title]
		> Autocatalysis, as it is being applied here, is essentially > similar to using Markov Chains to analyze and then generate a string > of elements.
		In addition, unlike Markov > Chains, autocatalysis can occur over a variety of different string > lengths, thereby allowing large strings to act as templates for the > creation of even larger strings containing the original catalyst as a > subset.
		Autocatalysis simply finds whatever patterns exist > in the composition, and builds new compositions from these patterns > taking their mutual compatibility into account.
	www.ibiblio.org /emusic-l/back-issues/vol043/issue04.txt (2174 words)

	Ecosystemic Life Hypothesis
		Founded on the concept of indirect mutualism, which for Ulanowicz is synonymous with autocatalysis, ascendency captures the dynamics of reaction or trophic networks as they grow, self-organize and complexify.
		In summary Ulanowicz offers 1) indirect mutualism (autocatalysis) as the key to the systemic, order-generating behavior of life and ecosystems, 2) a dynamic tension between growth and development that gives rise to ascendency, and 3) a "window of vitality" that living systems must navigate between too much and too little order.
		First, with help of Ulanowicz' focus on autocatalysis and loops of causality and Lotka's emphasis on whole systems, I would seek initially to sketch a larger, "full-circle" picture of the dynamics in which soils are embedded.
	www.calresco.org /fiscus/esl.htm (5458 words)

	Mutual inhibition with autocatalysis, and leak (Site not responding. Last check: 2007-11-04)
		We show in appendix B that our models with mutual inhibition and autocatalysis, with or without leak, always converge to an equilibrium (and thus never oscillate).
		The 4 elements are initially coexpressed at an identical level, which increases with
		because of autocatalysis); when the leak reaches a threshold level, one element is upregulated, and others are downregulated.
	www-timc.imag.fr /Olivier.Cinquin/High-dimensional_switches_and_the_modeling_of_cellular_differentiation/node11.html (393 words)

	News & Features: Asymmetric autocatalysis and its implications for the origin of homochirality
		Topic: Asymmetric autocatalysis and its implications for the origin of homochirality
		Asymmetric autocatalysis and its implications for the origin of homochirality
		Abstract: An autocatalytic reaction in which the reaction product serves as a catalyst to produce more of itself and to suppress production of its enantiomer serves as a mechanistic model for the evolution of homochirality.
	www.iscid.org /boards/ubb-get_topic-f-1-t-000152.html (212 words)

	Phase-Transfer Model for the Dynamics of "Micellar Autocatalysis" (Site not responding. Last check: 2007-11-04)
		The biphasic alkaline hydrolysis of ethyl caprylate (EC) exhibits highly nonlinear kinetics that has been attributed in the literature to "micellar autocatalysis" (Bachmann, P.
		New experimental results enable us to establish a macroscopic kinetic model quantitatively accounting for the dynamics of this reaction.
		According to the model, EC is carried from the organic to the aqueous phase by a transient micelle-EC complex (MEC).
	pubs.acs.org /cgi-bin/abstract.cgi/jpcafh/1997/101/i21/abs/jp9705838.html (117 words)

	At Home in the Universe. (Stuart Kauffman).
		Kauffman mentions inhibitors briefly in The Origins of Order[2], and concludes that they do not prevent autocatalytic closure, but inhibition is not a basic component of his model.
		Kauffman's universe is fit for life because the probability of an arbitrary protein to catalyze another chemical reaction is high enough to guarantee autocatalysis.
		In Denton's universe life utterly depends on 'the specific' and 'the unique', on a long chain of coincidences.
	home.wxs.nl /~gkorthof/kortho32.htm (3394 words)

	The 2000 T. H. Morgan Medal Essay: H. J. Muller and the Nature of the Gene -- Witkin 157 (2): 461 -- Genetics
		which he called "mutable autocatalysis," persists through change
		autocatalysis "lies at the heart of organic evolution, and hence
		was an early neo-Darwinian, evoking mutable autocatalysis as
	www.genetics.org /cgi/content/full/157/2/461 (1964 words)

	Steinbach et al (1998) (Site not responding. Last check: 2007-11-04)
		MyoD autoactivation is direct, but subject to the same temporal restriction as MyoD induction by MIF signalling.
		Further evidence implicating MyoD autocatalysis as an essential component of the induction process comes from the observation that both autocatalysis and induction of MyoD are selectively repressed by a dominant-negative MyoD mutant.
		Inhibition of MyoD autocatalysis blocks transcriptional induction of the MyoD gene (panel B)
	www.fml.tuebingen.mpg.de /rupp/abs05.html (265 words)

	The Origin and Evolution of Culture and Creativity (Site not responding. Last check: 2007-11-04)
		Memetics can do more than account for the spread of catchy tunes; it can pave the way for the kind of overarching framework for the humanities that the first form of evolution has provided for the biological sciences.
		On the other hand, creating new memes by combining previously-stored memes could interfere with the establishment of a sustained stream of thought by increasing the dimensionality of the space, thereby decreasing density.
		If indeed cross-category blending disrupts conceptual autocatalysis, one might expect it to be less evident in young children than in older children, and this expectation is born out experimentally (Karmiloff-Smith [45]).
	cogprints.org /794/00/oecc.html (13029 words)

	pubs
		Isothermal autocatalysis in the CSTR: exotic stationary-state patterns (isolas and mushrooms) and sustained oscillations
		Autocatalysis reactions in the isothermal, continuous stirred-tank reactor:
		The influence of the form of autocatalysis on the speed of chemical waves
	www.chem.leeds.ac.uk /People/SKS/sks_research/pubs.html (2132 words)

	types of catalysis
		You will also find a description of one example of autocatalysis - a reaction which is catalysed by one of its products.
		In autocatalysis, the reaction is catalysed by one of its products.
		As things get used up, the reaction slows down and eventually stops as one or more of the reactants are completely used up.
	www.chemguide.co.uk /physical/catalysis/introduction.html (2245 words)

	List of publications
		[1] `A note on the properties of a family of travelling wave solutions arising in cubic autocatalysis', Dynamics and Stability of Systems, (1991), 6, 1, 33-49.
		[2] `The development of travelling waves in quadratic and cubic autocatalysis with unequal diffusion rates.
		[3] `The development of travelling waves in quadratic and cubic autocatalysis with unequal diffusion rates.
	www.maths.nott.ac.uk /personal/pmzjb1/pub.htm (710 words)

	Untitled
		`A note on the properties of a family of travelling wave solutions arising in cubic autocatalysis'.
		`The development of travelling waves in quadratic and cubic autocatalysis with unequal diffusion rates.
		An initial value problem with an immobilized or nearly immobilized autocatalyst'.
	www.maths.nott.ac.uk /personal/pmzjb1/chem.htm (926 words)

Try your search on: Qwika (all wikis)