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Topic: Activated complex


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In the News (Sat 20 Jul 19)

  
  Encyclopedia :: encyclopedia : Complex number   (Site not responding. Last check: 2007-10-24)
In mathematics, the term "complex" when used as an adjective means that the field of complex numbers is the underlying number field considered, for example complex analysis, complex matrix, complex polynomial and complex Lie algebra.
The conjugate of the complex number z corresponds to the transformation which rotates through the same angle as z but in the opposite direction, and scales in the same manner as z; this can be described by the transpose of the matrix corresponding to z.
The study of functions of a complex variable is known as complex analysis and has enormous practical use in applied mathematics as well as in other branches of mathematics.
www.hallencyclopedia.com /Complex_number   (3057 words)

  
 RAF1-activated MEK1 is found on the Golgi apparatus in late prophase and is required for Golgi complex fragmentation in ...
of mitotic cytosol with recombinant Raf-239 inhibited RAF1 activation
Raf-239 inhibits endogenous RAF1 activation and Golgi complex fragmentation.
Raf-239 inhibits activation of the endogenous RAF1 by 75%.
www.jcb.org /cgi/content/full/161/1/27   (3467 words)

  
 Activated complex - Wikipedia, the free encyclopedia
In chemistry an activated complex is a transitional structure in a chemical reaction that results from an effective collision between molecules and that persists while old bonds are breaking and new bonds are forming.
In this brief interval of bond breakage and bond formation, the collision complex is in a transitional state.
The exact structure of this complex is often difficult to determine, but is important to understanding the mechanism of a reaction.
en.wikipedia.org /wiki/Activated_complex   (164 words)

  
 Transition state - Wikipedia, the free encyclopedia
This started with the transition state theory (also referred to as the Activated Complex Theory), which was first developed around 1935 and which introduced basic concepts in chemical kinetics which are still used today.
Even if the collision partners form an activated complex they are not bound to go on and form products, and instead the complex may fall apart back to the reactants.
Because of the rules of quantum mechanics, the transition state cannot be captured or directly observed; the population at that point is zero.
en.wikipedia.org /wiki/Transition_state   (492 words)

  
 Activated Carbon   (Site not responding. Last check: 2007-10-24)
Activated carbon 1: '''Activated carbon''' (also called '''activated charcoal''') is the more general term which inclu 3: Activated carbon is used in metal extraction (e.g.
In contrast, PPARand#945; is activated by leukotriene B4.
Activated complex 1: In chemistry an '''activated complex''' is a transition al structure that r 7: colliding molecules to form an activated complex.
www.witchware.com /File/47320-Activated.Carbon.Html   (317 words)

  
 JIAS:Volume 5/4   (Site not responding. Last check: 2007-10-24)
The slopes indicate that the activated complex is more solvated than the reactants and there is an increase in the electrostatic interaction between the reacting ions at lower dielectric constant.
Rate measurements data tabulated in Table 1 was used to evaluate the activation parameters as a function of ionic strength of the medium.
It was observed that energy of activation is related to the ionic strength of the reaction mixture.
www.medicaljournal-ias.org /5_4/Uddin.htm   (1392 words)

  
 Activation Complex Tutorial
Bonding or nonbonding electron pairs in the reactants are "pushed" to form new bonds or break old bonds in much the same way that you illustrate reaction mechanisms in organic chemistry.
As an initial guess for the activated complex, consider a structure in which a new bond between a hydrogen atom in the borane and a carbon atom in ethylene and a new bond between the boron atom in borane and the second carbon atom in ethylene are just beginning to form.
The energy state of the activated complex should be located at a first-order saddle point on the potential energy surface i.e.
www.chm.davidson.edu /ronutt/che401/B2H6_ts/B2H6_ts_Tutor.htm   (927 words)

  
 CHM2041 Lectures   (Site not responding. Last check: 2007-10-24)
Although it is nice when the stoichiometry of a reaction tells us directly the 'molecularity' of the collision event that leads to the activated complex of the reaction, this is not normally the case.
Perhaps the most famous of the complex reaction mechanisms is that of the simple gas-phase dissociation of a molecule which takes into account that Collisions are necessary to provide the energy of activation for the reaction.
Since the rate of the reaction is equal to the rate at which the activated complex is formed, which is bimolecular, the kinetics of the reaction are second order.
www.tau.ac.il /~phchlab/experiments/explosion/chain.htm   (777 words)

  
 [No title]
Extrinsic Pathway The activation of the contact system is largely unknown, but what is understood is that damage to the endothelium causes the presence of HMWK and activation of factor XII.
Activation of factor XIII or fibrinoligase by thrombin causes the formation of solid covalent bond and fibrin in this states is not soluble and called fibrin IS(or insoluble fibrin).
Activated Protein C is released from the thrombomodulin complex and now binds to Protein S(cofactor)1.
intmedweb.wfubmc.edu /download/dic.doc   (5711 words)

  
 Foundations to Chemistry - adapted from "Chemistry, Matter and the Universe"
The activated complex will decompose when molecular vibrations rupture either one of these bonds, and it could just as well result in reactant molecules as product molecules.
We will find the picture of an activated complex as being a reaction intermediate useful, even though we will not go into the mathematics of the transtion state theory.
The activated complex is the state at the top of the "mountain" in the drawing opposite.
www.chem.ox.ac.uk /vrchemistry/chapter15/html/page29.htm   (183 words)

  
 Interleukin-1 (IL-1) Receptor-Associated Kinase-Dependent IL-1-Induced Signaling Complexes Phosphorylate TAK1 and TAB2 ...
IRAK and consequent translocation of complex III to the cytosol.
B to activate transcription in the nucleus (17, 22, 29, 35).
of complex III from the membrane to the cytosol.
mcb.asm.org /cgi/content/full/22/20/7158   (6149 words)

  
 Daily Vitamins
Daily Activated B6 is available in bottles of 100 capsules.
Activated B-12 contains equal amounts of 5-deoxyadenosyl cobalamin and methylcobalamin, the active forms of vitamin B-12.
All of the B vitamins are provided in the forms best utilized by the human body, thereby providing optimal nutrient support for the entire B group.
www.daily-mfg.com /products/vitamins.htm   (982 words)

  
 Transactivation of Fra-1 and Consequent Activation of AP-1 Occur Extracellular Signal-Regulated Kinase Dependently -- ...
The activation of Elk-1, SRE, and c-fos expression relative to that in the ERK-sufficient Cl 41 cells is shown.
Activation of the Gal4-Fra-1 fusion in the ERK-sufficient AP-1-responsive
Sustained MAP kinase activation is required for the expression of cyclin D1, p21Cip1 and a subset of AP-1 proteins in CCL39 cells.
mcb.asm.org /cgi/content/full/22/2/587   (8602 words)

  
 NEJM -- The effect of activated prothrombin-complex concentrate (FEIBA) on joint and muscle bleeding in patients with ...
NEJM -- The effect of activated prothrombin-complex concentrate (FEIBA) on joint and muscle bleeding in patients with hemophilia A and antibodies to factor VIII.
The effect of activated prothrombin-complex concentrate (FEIBA) on joint and muscle bleeding in patients with hemophilia A and antibodies to factor VIII.
We designed a double-blind trial to study the effect of an "activated" prothrombin-complex concentrate (FEIBA) on joint and muscle bleeding in hemophiliacs with antibodies to factor VIII.
content.nejm.org /cgi/content/short/305/13/717   (456 words)

  
 BCH4053 FALL 2001 template   (Site not responding. Last check: 2007-10-24)
The substrate molecule is then strained by the forces of attraction to the enzyme, which tends to deform it into the configuration of the "activated complex" for which the enzyme active site has the greatest attraction.
The activated complex, under the influence of normal thermal agitation, either reassumes the configuration of the substrate, or assumes the configuration of the product (the "activated complex" is a high-energy unstable molecule, and in comparison, both the substrate and product conformations are lower in energy)
The binding energy of the enzyme with the "activated complex" is used to help convert the substrate to the transition state.
wine1.sb.fsu.edu /BCH4053/Lecture28/Lecture28.htm   (1395 words)

  
 activation energy
The path from reactants through the activated complex to the final products is known as the reaction mechanism.
If the activation energy is low, a greater proportion of the collisions between reactants will result in reactions.
Because the relationship of reaction rate to activation energy and temperature is exponential, a small change in temperature or activation energy causes a large change in the rate of the reaction.
www.factmonster.com /id/A0802389   (450 words)

  
 GDF11 Forms a Bone Morphogenetic Protein 1-Activated Latent Complex That Can Modulate Nerve Growth Factor-Induced ...
the D120A mutation is not activated by BMP1.
Activation of latent transforming growth factor ß1 by stromelysin 1 in extracts of growth plate chondrocyte-derived matrix vesicles.
Inhibition of endothelial cell movement by pericytes and smooth muscle cells: activation of a latent transforming growth factor-ß1-like molecule by plasmin during co-culture.
mcb.asm.org /cgi/content/full/25/14/5846   (7530 words)

  
 PClF4
The chlorine atom is at the vertex of the square pyramid.
for the activated complex with the chlorine atom in the basal plane (C
activation energies, the calculations are consistent with experimental observations.
www.chm.davidson.edu /ronutt/pf4cl.htm   (640 words)

  
 Carbonylhydridonitrosyltris(trimethylphosphine)molybdenum(0): An Activated Hydride Complex
Only in the case of a bisdihydroproline ester did an insertion take place, however, across the ester carbonyl group.
Concomitant elimination of a phosphine moiety was observed with formation of the isolable chelate complex
The structures of complexes 2, 3, 4b, 7a, 7b, and 8 were studied by X-ray diffraction.
pubs.acs.org /cgi-bin/abstract.cgi/orgnd7/2000/19/i10/abs/om990945t.html   (257 words)

  
 Mammalian Mitogen-Activated Protein Kinase Signal Transduction Pathways Activated by Stress and Inflammation -- ...
are not strongly activated by stresses (10, 164).
Nuclear translocation is essential for ERK-dependent activation of gene expression and regulation of the cell cycle.
The SAPKs are activated upon concomitant phosphorylation at Thr-183 and Tyr-185.
physrev.physiology.org /cgi/content/full/81/2/807   (8909 words)

  
 Homeodomain and winged-helix transcription factors recruit activated Smads to distinct promoter elements via a common ...
Transcriptional activation was calculated as a ratio of the levels of Test-globin to REF-globin.
Complexes of transcription factors and probe are indicated; (fl arrow) ternary complex with GSTSmad2C.
Milk/Bix3-Smad complexes are involved in the initiation of transcription of mesoendodermal genes and Mixer/Milk/Bix-Smad complexes are involved in the maintenance of gene expression.
www.genesdev.org /cgi/content/full/14/4/435   (7650 words)

  
 Activated Arginine Complex - AAC
It is involved in complex behavioral changes in the brain, airway relaxation, beating of the heart, dilation of blood vessels, regulation of intestinal movement, function of blood cells, the immune system, even how digits and arms move."
Among the effects of nitric oxide are vasodilatation and control of blood pressure, facilitating long-term memory, reducing cholesterol levels, preventing LDL oxidation, increasing immune function, and restoring erectile response in males and lubrication in females.
Sexual stimulation causes the brain to activate the release of nitric oxide from arginine in the penis.
www.vke-cellfood.com /aac.htm   (2497 words)

  
 Platelet activation leads to activation and propagation of the complement system -- del Conde et al. 201 (6): 871 -- ...
activated platelets and C3b is mediated by P-selectin (Fig.
of the C5b-9 complex on ADP-stimulated platelets (Figs.
Binding of factor B to C3b initiates formation of C3 convertase (C3bBb) on the surface of activated platelet or endothelial cells.
www.jem.org /cgi/content/full/201/6/871   (4821 words)

  
 Peroxide Catalysis and Activated Complex Formation - Teacher's Guide
Activated complex formation is demonstrated by the color change from pink to green; the green color indicates production of a Co(III) complex, although that is not the activated complex.
(Activated complexes typically exist for too brief a time to be observable.)
The structure and behavior of matter at the molecular level and at the level of molecular organization are central to the demonstration.
www.chemheritage.org /EducationalServices/pharm/tg/antibiot/demos/cataly.htm   (438 words)

  
 [No title]
For activation controlled reaction k-d>kr therefore the rate of formation of products from the encounter pair (kr) is much slower then the rate of diffusion of reactants (k-d) The rate of reaction is determined by the crossing of the activation barrier between the encounter pair and products.
The activated complex I- - H2O2 has a net charge of —1 which is the same charge which has the same charge as the reactant ion I.- The activated complex is neither stabilized or destabilized with increasing ionic strength thus the activation energy and reaction rate is independent of ionic strength.
Therefore as the ionic strength increased, the reactant ions (charges of +1 and —1) will be stabilized relative to the activated complex and therefore increasing the activation barrier and reaction rate will decrease.
www.chem.ed.ac.uk /bunsen_learner/3rdyearanswers/paper2_q7.doc   (554 words)

  
 activation energy
Cardiac Cachexia(*): A Syndrome With Impaired Survival and Immune and Neuroendocrine Activation.
Neurohormonal activation and exercise function in patients with severe heart failure and patients with left ventricular assist system:......
Transitional politics of Korea, 1987-1992: activation of civil society.
www.infoplease.com /id/A0802389   (592 words)

  
 General Chemistry Online: Glossary: Reaction rates
The activated complex is the structure at the maximum energy point along the reaction path; the activation energy
is the difference between the energies of the activated complex and the reactants.
The minimum energy required to convert reactants into products; the difference between the energies of the activated complex
antoine.frostburg.edu /chem/senese/101/kinetics/glossary.shtml   (518 words)

  
 Phosphatidylserine and DMAE Complex with activated Soy Phosphatides
Amino Acids, the famed building blocks of protein, are essential to the formation of muscle tissue and mass.
They have widespread involvement in a range of bodily functions, including efficient brain function and the manufacture of energy.
This groundbreaking complex is an ultra-potent, fast-acting blend with multiple physiological "targets."
www.1stvitality.co.uk /natures-plus/phosphatidylserine-dmae   (141 words)

  
 Sloan-Kettering - Cell-specific Transcriptional Control   (Site not responding. Last check: 2007-10-24)
Our working hypothesis is that in the nucleus, the activated Smad complex finds its way to particular target genes with the help of DNA-binding cofactors.
Different cells may respond differently to the same Smad complex depending on the Smad cofactors that they contain.
OAZ enables Smad1 to activate Vent-2, a homeobox gene that is key to the development of ventral mesoderm and neural tissues in Xenopus.
www.mskcc.org /mskcc/html/10625.cfm   (206 words)

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