Relevant bibliographies by topics / Dimer of dimer

Academic literature on the topic 'Dimer of dimer'

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Published: 9 March 2023

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Journal articles on the topic "Dimer of dimer"

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Apelblat, Alexander. "Dimerization and continuous association including formation of cyclic dimers." Canadian Journal of Chemistry 69, no. 4 (April 1, 1991): 638–47. http://dx.doi.org/10.1139/v91-097.

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New aspects of the theory of ideal associated mixtures related to a differentiation between formed cyclic and linear dimers are discussed. A mathematical analysis is presented for the dimerization model, A + B + A2, the continuous association (Mecke–Kempter) model, [Formula: see text], both coupled with the cyclic dimmer → linear dimer transformation and for the unsymmetrical (mixed) dimer formation model, A + B + A2 + B2 + AB. Introduction of the standard reaction enthalpies and volumes associated with transformations of dimers leads to a considerable change in behavior and symmetry properties of the excess thermodynamic functions. In terms of the modified Mecke–Kempter model, a consistent representation of the excess Gibbs energy of mixing GE, heat of mixing HE, and excess molar volume VE is reported for the acetic acid – water system at 298.15 K. Key words: association, dimerization, linear dimers, cyclic dimers, hydrogen bonding, carboxylic acids, alcohols, aqueous solutions.
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Huang, Dengchao, Shilin Liu, and Kang Yang. "Highly Unidirectional Radiation Enhancement Based on a Hybrid Multilayer Dimer." Nanomaterials 12, no. 4 (February 21, 2022): 710. http://dx.doi.org/10.3390/nano12040710.

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Dimers made of plasmonic particles support strong field enhancements but suffer from large absorption losses, while low-loss dielectric dimers are limited by relatively weak optical confinement. Hybrid dimers could utilize the advantages of both worlds. Here, we propose a hybrid nanoantenna that contains a dimer of core-dual shell nanoparticles known as the metal–dielectric–metal (MDM) structure. We discovered that the hybrid dimer sustained unidirectional forward scattering, which resulted in a nearly ideal Kerker condition in the frequency close to the resonance peak of the dimer due to enhancing the amplitude of the induced high-order electric multiples in the gap and effectively superimposing them with magnetic ones, which respond to the excitation of the plane wave in the dielectric layer of the dimer. Furthermore, when an electric quantum emitter is coupled to the dimer, our study shows that the optimal hybrid dimer simultaneously possesses high radiation directivity and low-loss features, which illustrates a back-to-front ratio of radiation 53 times higher than that of the pure dielectric dimer and an average radiation efficiency 80% higher than that of the pure metallic dimer. In addition, the unique structures of the hybrid hexamer direct almost decrease 75% of the radiation beamwidth, hence heightening the directivity of the nanoantenna based on a hybrid dimer.
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HUANG, YAN, XIAOYAN ZHU, and XIAOSHUANG CHEN. "SINGLE Si AD-DIMER DEPOSITION BEHAVIOR ON P(2×2)Si SURFACE." International Journal of Modern Physics B 20, no. 02 (January 20, 2006): 125–32. http://dx.doi.org/10.1142/s0217979206033140.

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The deposition of single Si ad-dimer on the p(2×2) reconstructed Si (100) surface has been simulated by an empirical tight-binding (ETB) method. Using the clean and defective Si surfaces as the deposition substrates, the deposition energies are mapped out around the clean surface and dimer vacancies. From the calculated energy plots, the binding sites and several possible diffusion paths are achieved. It is easy for the ad-dimer to form stable state A1 and metal stable state A2 on the clean surface. The change from A1 to A2 state appears as the rotation of the ad-dimer, which has been observed experimentally. The ad-dimers are found to prefer filling into the missing dimer vacancies. Finally, the diffusion traces of the ad-dimers on the surfaces have been simulated.
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Gould, Katherine A., Xiao-Su Pan, Robert J. Kerns, and L. Mark Fisher. "Ciprofloxacin Dimers Target Gyrase in Streptococcus pneumoniae." Antimicrobial Agents and Chemotherapy 48, no. 6 (June 2004): 2108–15. http://dx.doi.org/10.1128/aac.48.6.2108-2115.2004.

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ABSTRACT We have examined the antipneumococcal activities of novel quinolone dimers in which ciprofloxacin was tethered to itself or to pipemidic acid by linkage of C-7 piperazinyl rings. Symmetric 2,6-lutidinyl- and trans-butenyl-linked ciprofloxacin dimers (dimers 1 and 2, respectively) and a pipemidic acid-ciprofloxacin dimer (dimer 3) had activities against Streptococcus pneumoniae strain 7785 that were comparable to that of ciprofloxacin, i.e., MICs of 2, 1, and 4 to 8 μg/ml versus an MIC of 1 to 2 μg/ml, respectively. Surprisingly, unlike ciprofloxacin (which targets topoisomerase IV), several lines of evidence revealed that the dimers act through gyrase in S. pneumoniae. First, ciprofloxacin-resistant parC mutants of strain 7785 remained susceptible to dimers 1 to 3, whereas a gyrA mutation conferred a four- to eightfold increase in the dimer MIC but had little effect on ciprofloxacin activity. Second, dimer 1 selected first-step gyrA (S81Y or S81F) mutants (MICs, 8 to 16 μg/ml) that carried wild-type topoisomerase IV parE-parC genes. Third, dimers 1 and 2 promoted comparable DNA cleavage by S. pneumoniae gyrase and topoisomerase IV, whereas ciprofloxacin-mediated cleavage was 10-fold more efficient with topoisomerase IV than with gyrase. Fourth, the GyrA S81F and ParC S79F enzymes were resistant to dimers, confirming that the resistance phenotype is largely silent in parC mutants. Although a dimer molecule could bind very tightly by bridging quinolone binding sites in the enzyme-DNA complex, the greater potency of ciprofloxacin against gyrase and topoisomerase IV suggests that dimers 1 to 3 bind in a monomeric fashion. The bulky C-7 side chain may explain dimer targeting of gyrase and activity against efflux mutants. Tethered quinolones have potential as mechanistic tools and as novel antimicrobial agents.
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Ploegh, Hidde, and Philippe Benaroch. "MHC class II dimer of dimers." Nature 364, no. 6432 (July 1993): 16–17. http://dx.doi.org/10.1038/364016d0.

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Breslow, Ronald, Sandro Belvedere, Leland Gershell, and David Leung. "The chelate effect in binding, catalysis, and chemotherapy." Pure and Applied Chemistry 72, no. 3 (January 1, 2000): 333–42. http://dx.doi.org/10.1351/pac200072030333.

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Cyclodextrin (CD) dimers bind amino acid side chains, and such binding can dissociate aggregated proteins, including citrate synthase (dimer) and lactic dehydrogenase (tetramer). A CD dimer can bind a hydrophobic photosensitizer that, upon irradiation, generates singlet oxygen. This cleaves the dimer and releases the photosensitizer. CD dimers in a cytochrome P-450 mimic steer catalyzed hydroxylation to a bound steroid with geometric control. Chelate binding has also led to a group of cytodifferentiating agents whose mechanism has been recently established. They have promising anticancer properties, and are currently entering human trials as therapeutic agents.
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Caliezi, Holtz, and Wuillemin. "Case 16: Use of D-dimer assay in suspected deep vein thrombosis or pulmonary embolism." Therapeutische Umschau 56, no. 9 (September 1, 1999): 529–32. http://dx.doi.org/10.1024/0040-5930.56.9.529.

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D-Dimere sind Abbauprodukte des quervernetzten Fibrins nach fibrinolytischer Spaltung durch Plasmin. D-Dimere können im Plasma oder im Vollblut mittels gegen Epitope des D-Dimers gerichteter monoklonaler Antikörper nachgewiesen werden. Erhöhte D-Dimer-Werte finden sich bei Patienten mit tiefer Venenthrombose (TVT) oder Lungenembolie (LE), aber auch z.B. bei Patienten mit Infektionen, malignen Tumoren oder Herzinsuffizienz. Die Bestimmung der D-Dimere hat sich als früher Abklärungsschritt in der Diagnostik venöser Thromboembolien (TVT/LE) etabliert. Die hohe Sensitivität verschiedener ELISA-Teste ermöglicht es, die Diagnose einer TVT oder LE zuverlässig auszuschließen, falls die Konzentration der D-Dimere unterhalb einer kritischen Schwelle (sog. cut-off) liegt. Bei ambulanten Patienten gelingt es so, in rund 30% der Fälle mit Hilfe eines gut validierten Testes eine venöse Thromboembolie auszuschließen und auf weitere diesbezügliche Untersuchungen zu verzichten.
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Li, Wen-Tyng, John W. Shriver, and John N. Reeve. "Mutational Analysis of Differences in Thermostability between Histones from Mesophilic and Hyperthermophilic Archaea." Journal of Bacteriology 182, no. 3 (February 1, 2000): 812–17. http://dx.doi.org/10.1128/jb.182.3.812-817.2000.

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ABSTRACT Amino acid residues responsible for the large difference in thermostability between HMfB and HFoB, archaeal histones from the hyperthermophile Methanothermus fervidus and the mesophileMethanobacterium formicicum, respectively, have been identified by site-specific mutagenesis. The thermal denaturation of ∼70 archaeal histone variants has been monitored by circular dichroism, and the data generated were fit to a two-state unfolding model (dimer→two random coil monomers) to obtain a standard-state (1M) melting temperature for each variant dimer. The results of single-, double-, and triple-residue substitutions reveal that the much higher stability of rHMfB dimers, relative to rHFoB dimers, is conferred predominantly by improved intermolecular hydrophobic interactions near the center of the histone dimer core and by additional favorable ion pairs on the dimer surface.
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Tholen, Inger, Christiane Weingart, and Barbara Kohn. "Concentration of D-dimers in healthy cats and sick cats with and without disseminated intravascular coagulation (DIC)." Journal of Feline Medicine and Surgery 11, no. 10 (October 2009): 842–46. http://dx.doi.org/10.1016/j.jfms.2009.04.008.

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The objective of this prospective study was to measure concentrations of D-dimers in 48 cats with various diseases and in 20 healthy cats to evaluate the sensitivity and specificity for D-dimers to diagnose disseminated intravascular coagulation (DIC). The cats were classified as having DIC if an underlying disease and at least three of the following criteria were present: thrombocytopenia, prolonged activated partial thromboplastin time, prothrombin time or thrombin time, schistocytes and/or a reduced antithrombin activity. D-dimer concentrations were measured using a semi-quantitative latex agglutination (LA) test (Accuclot D-Dimer, Sigma Diagnostics). The D-dimer test was positive for 8/12 cats with DIC and for 16/36 sick cats without DIC. D-dimers were negative for all healthy control cats. The comparison of the sick cats with DIC and those without DIC revealed a specificity and sensitivity of the D-dimer test of 56% and 67%; a comparison of the results for healthy cats and cats with DIC revealed a specificity and sensitivity of 100% and 67%, respectively. The D-dimer LA test is only of limited value for the diagnosis of DIC in cats.
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Lazaroff, Carolyn, David Peeney, Sadeechya Gurung, and William G. Stetler-Stevenson. "Abstract 3837: The physiological relevance of TIMP dimer formation." Cancer Research 82, no. 12_Supplement (June 15, 2022): 3837. http://dx.doi.org/10.1158/1538-7445.am2022-3837.

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Abstract Tissue inhibitors of metalloproteinases (TIMPs) are a family of four paralogous genes that modulate the activity of matrix metalloproteinases (MMPs) and are vital for tissue homeostasis. Additionally, TIMPs display activities that are independent of their MMP inhibitory activities. Dysregulation and perturbations within this system can lead to complex tissue-specific pathologies. TIMP2 is the most abundantly expressed member of the TIMP family and has been shown to display potential therapeutic uses in cancer and other diseases. We have noted the persistent presence of SDS-stable TIMP2 dimers/multimers in SDS-PAGE at a level of ~5% total protein. The goal of this study is to determine the stability and biological relevance of SDS-stable dimer formation of TIMP2 in in vitro and in vivo. We found that TIMP2 dimers display an enhanced ability to inhibit MMP2 activity in reverse zymography assays. Immunoblotting revealed gel extracted TIMP2 dimer entered an equilibrium with monomeric TIMP2, while the extracted monomer did not form new dimer. In addition, MMP2 activity assays do not corroborate the enhanced MMP2 inhibitory activity observed in reverse zymograms but are consistent with the observation that isolated TIMP2 dimers re-equilibrate with monomers. This implies that structural or sequence difference mediates the formation of dimers. Dimer/multimer formation is observed across the TIMP family. Mass spectrometry analysis of gel extracted TIMP monomers and dimers show that monomer and dimer forms of TIMPs display unique post-translation modification (PTM) profiles. We propose that understanding the interplay between TIMP multimers and PTMs will reveal new biological functions within this intriguing family of proteins. We are currently working to resolve the functional differences between monomer and dimer and reveal the underlying mechanisms at play. Citation Format: Carolyn Lazaroff, David Peeney, Sadeechya Gurung, William G. Stetler-Stevenson. The physiological relevance of TIMP dimer formation [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 3837.
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Dissertations / Theses on the topic "Dimer of dimer"

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L'Écuyer, Tristan Simon. "Water dimer atmospheric absorption." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq24864.pdf.

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Hamdan, Abdullah. "Infrared spectroscopy of methane dimer." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=978829921.

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Guhathakurta, Anjan. "Topological specificity of ColE1 dimer resolution." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321370.

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Broomhead, Nathan. "Dimer models and Calabi-Yau algebras." Thesis, University of Bath, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500694.

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In this thesis we use techniques from algebraic geometry and homological algebra, together with ideas from string theory to construct a class of 3-dimensional Calabi-Yau algebras. The Calabi-Yau property appears throughout geometry and string theory and is increasingly being studied in algebra. Dimer models, first studied in theoretical physics, give a way of writing down a class of non-commutative algebras, as the path algebra of a quiver with relations obtained from a 'superpotential'. Some examples are Calabi-Yau and some are not. We consider two types of 'consistency' condition on dimer models, and show that a 'geometrically consistent' dimer model is 'algebraically consistent'. Finally we prove that the algebras obtained from algebraically consistent dimer models are 3-dimensional Calabi-Yau algebras.
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Qian, Yue, and 钱玥. "Electronic spectroscopy of transition metal dimer." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50899971.

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This thesis reports laser spectroscopic studies of gas-phase transition metal dimers using laser ablation/reaction with free jet expansion and laser-induced fluorescence (LIF) spectroscopy technique. Themolecules studied in this work are palladium dimer (Pd2) and vanadium dimer (V2). Many compounds formed from these transition metals are important and functional catalysts in chemical reactions. Therefore, it is of great significance to start from the fundamental level to understand the properties and characteristics of the metal bonding and also the behavior of these metals when reacting with other chemicals. The electronic transitions of Pd2and V2in the visible region were studied. Gas-phase Pd2and V2moleculeswereproduced by laser ablation of palladium and vanadium metal rod, respectively. For the Pd2molecule, eleven vibrational bands were recorded and analyzed, and have been assigned to the 〖[17.1]〗^3 □_g□ X^3 □_u^+ transition system. The bond length and vibrational frequency of the ground X^3 □_u^+ state were determined to be 2.47 Å and 211.38 cm-1, respectively. This is the first experimental investigation of the electronic transitions of Pd2.For the V2molecule,six vibrational bands were observed and assigned to a new 〖[19.6] 〗^3 □_u^□□ X^3 □_g^□ transition system. Molecular constants for the 〖[19.6] 〗^3 □_u^□ excited state were obtained from high-resolution LIF spectra. The electronic structure of the Pd2andV2molecules was discussed in detail using molecular orbital energy level diagrams, which is important for understanding the nature of chemical bonding in these dimers. Comparison of the transition metal dimers studied in this work with other dimers is also presented.
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Chemistry
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Master of Philosophy
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Griffiths, Hywel David. "Nucleoprotein complexes in ColE1 dimer resolution." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268532.

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Macdonald, James William. "Laser photoionisation spectroscopy of silver dimer." Thesis, University of Edinburgh, 1993. http://hdl.handle.net/1842/11074.

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A number of experimental techniques have been brought together to create a powerful investigative tool. This laser vaporisation, supersonic expansion, laser ionisation mass spectrometry amalgam has allowed the study of two distinct types of molecular species. Many heteronuclear diatomic species have been prepared and investigated for the first time. These novel molecules are of interest due to their utility as bulk phase alloys. Mass spectra are presented for many such combinations. Homonuclear diatomic species have been analysed using these techniques for some time. In particular, this work has focused on transition metal species as this is one of the few methods which permits such study. Spectroscopic investigations of the A, B and C states of the silver dimer (Ag2) molecule are presented here. The analysis of this work has provided the following rotational constants for these states; X state Be = 0.04878 cm-1 A state Be = 0.04432 cm-1 B state Be = 0.04544 cm-1 and C state B0 = 0.04851 cm-1. All values are for the 107,109Ag2 isotopomer. The first ionisation potential (I.P.) of any molecular system is an important parameter in the understanding of that species. The value of the I.P. has been evaluated for the silver dimer molecule under differing experimental conditions. It is reported here both under the influence of a potential field (I.P. = 61658.4 cm-1) and under field free conditions (I.P. = 61740.0 cm-1).
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Hossain, Mir Ashad. "Does SABP2 Exist As a Dimer?" Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/2255.

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Salicylic acid binding protein 2 (SABP2) is one of the key enzymes in salicylic acid-dependent plant defense pathway. SABP2 is a 29 kDa protein present in extremely low abundance in plants and it catalyzes the conversion of signaling molecule methyl salicylate into salicylic acid. Although it has been shown that 6x His-tagged SABP2 over expressed in E. coli is a homodimer, its exact conformation in planta is still unknown. Therefore, we proposed to determine if SABP2 exist as a dimer and/or monomer under natural condition. To verify the exact conformation of native SABP2 protein in plant, SABP2 was purified from wild type tobacco using a 5-step purification protocol. Analysis of purified SABP2 in gel filtration and immunoblot assay suggested that SABP2 exists as a monomer in tobacco plant. Studies on SABP2 conformation will give us insight into the structure and functional relationship of this protein in salicylic acid-dependent disease resistance pathway.
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FABBRICATORE, RICCARDO. "CRITICAL PHENOMENA IN RANDOM DIMER MODELS." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/814963.

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This thesis introduces the concept of criticality and universal behaviour for vastly different systems. The assumption of conformal invariance for systems at critical temperature is shown to yield incredible predictions with the use of Conformal Field Theory. By focusing on the properties of geometrical shapes at criticality, we introduce Schramm-Loewner Evolution (SLE), a powerful tool to extract information about conformality. Rigorously proving that a discrete system exhibits critical behaviour and conformal invariance in the thermodynamic limit is no easy task. When the system is imbued with quenched disorder, this task becomes even harder. As of today, there is no rigorous proof that a single disordered system exhibits SLE-compatible excitations. This thesis, albeit not providing any such proof, analyses numerically and extensively shows under which conditions such behaviour can be observed in a system with quenched disorder, namely the Random Dimer Model. The Random Dimer Model consists of a dimer cover of a weighted graph. Its ground state corresponds to the minimum-weight perfect matching. Dimers are often used in Statistical Mechanic, providing a fruitful mapping from a model to a combinatorial problem. By topological perturbations, we obtain excitations in the form of fractal curves. Observables based on these geometrical objects, such as their length, are shown to behave as power laws compatible with other well-known systems at critical point. Moreover, the extensive analysis of winding angle and Left Passage Probability at the thermodynamic limit, strongly suggests that excitation curves in the Random Dimer Model are conformal and compatible with Schramm-Loewner Evolution. The latter casts light on the yet vastly unexplored question of conformal behaviour for disordered models at critical temperature in the thermodynamic limit.
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Attwood, Brian Christopher. "Global phase diagram for monomer/dimer mixtures." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20011012-113555.

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The objective of this thesis is to calculate the global phase diagram predicted by the Generalized Flory Dimer equation of state for mixtures of square-well monomers and dimers. Towards that goal, we first extend the Generalized Flory Dimer (GFD) theory for hard sphere monomer/dimer mixtures to square-well monomer/dimer mixtures. Theoretical predictions for the compressibility factor as a function of volume fraction are compared to discontinuous molecular dynamic simulation results on monomer/dimer mixtures at well depth ratios 0.5 - 1.5 and dimer mole fractions 0.111 - 0.667 and on monomers/8-mer mixtures at well depth ratios 0.5 - 1.5. Agreement is found generally to be good and consistent with the agreement obtained when the GFD theory is applied to other square-well systems. Next we calculate the GFD predicted global phase diagram for square-well monomer/dimer mixtures using a brute force method. The locus of critical points in the direction implies that monomer/dimer systems have a greater tendency towards liquid-liquid immiscibility in our system than in monomer/monomer systems.

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Books on the topic "Dimer of dimer"

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Dimer models and Calabi-Yau algebras. Providence, R.I: American Mathematical Society, 2012.

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Zhou, Y. J. The effect of ageing of alkyl ketene dimer sizing. Manchester: UMIST, 1991.

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Gifford, Peter. Black and white and in between: Arthur Dimer and the Nullarbor. Victoria Park, W.A: Hesperian Press, 2002.

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Yano, Hideaki. Deconstructing G Protein-Coupled Receptor Dimer Pharmacology: Case Studies in Dopamine D1 and D2 Receptors. [New York, N.Y.?]: [publisher not identified], 2012.

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C, Costen Robert, and Langley Research Center, eds. Reduced dimer production in solar-simulator-pumped continuous wave iodine lasers based on model simulations and scaling and pumping studies. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1995.

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Swanson, Denise. Nickeled-and-dimed to death: A Devereaux's Dime Store Mystery. Thorndike, Maine: Center Point Large Print, 2013.

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Cull, Brian. Diver! Diver! Diver! London: Grub Street, 2008.

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Cull, Brian. Diver! Diver! Diver! London: Grub Street, 2008.

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Bruce, Lander, ed. Diver! Diver! Diver! London: Grub Street, 2008.

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Dimes! New York: PowerKids Press, 2016.

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Book chapters on the topic "Dimer of dimer"

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Gooch, Jan W. "Dimer." In Encyclopedic Dictionary of Polymers, 225. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3701.

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Liu, Xiaoping. "Dimer." In Encyclopedia of Systems Biology, 574. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-9863-7_450.

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Gooch, Jan W. "Dimer." In Encyclopedic Dictionary of Polymers, 887. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13566.

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Gooch, Jan W. "Dimer Acid." In Encyclopedic Dictionary of Polymers, 225. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3702.

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Gooch, Jan W. "Dimer Acids." In Encyclopedic Dictionary of Polymers, 225. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3703.

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Lavis, David A. "Dimer Models." In Theoretical and Mathematical Physics, 495–516. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-9430-5_13.

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Lavis, David A., and George M. Bell. "Dimer Assemblies." In Statistical Mechanics of Lattice Systems, 303–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-10020-2_8.

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Stief, T. "D-Dimer." In Springer Reference Medizin, 661. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-48986-4_838.

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Stief, T. "D-Dimer." In Lexikon der Medizinischen Laboratoriumsdiagnostik, 1–2. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49054-9_838-1.

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Cotton, Bryan A., and Laura A. McElroy. "D-Dimer." In Encyclopedia of Trauma Care, 429–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-29613-0_46.

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Conference papers on the topic "Dimer of dimer"

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Jayaprakash, K. R., Alexander F. Vakakis, and Yuli Starosvetsky. "Solitary Waves in 1:N Dimer Chains." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70297.

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In the present work we report the discovery of new families of solitary waves in a 1:N (N>1) granular dimers (a heavy bead followed and preceded by N light beads) wherein the Hertzian interaction law governs the interaction between spherical beads. We consider the dimer chain with zero precompression. The dynamics of such a dimer chain is governed by two system parameters, the stiffness ratio and the mass ratio between the light and the heavy beads. In particular we study in detail the solitary waves in 1:2 dimer chains [11]. The solitary waves in a 1:2 dimer are contrastingly different from that in a homogeneous chain and 1:1 dimer chain. Solitary waves realized in homogeneous and 1:1 dimer chains possess symmetric velocity waveforms. In contrast, in a 1:2 dimer chain we realize solitary waves that have symmetric velocity waveforms on the heavy beads, whereas that on the light beads is non-symmetric. The existence of families of solitary waves in these systems is attributed to the dynamical phenomenon to ‘anti-resonance’. This leads to the complete elimination of radiating waves in the trail of the propagating pulse. Anti-resonances are associated with certain symmetries of the velocity waveforms of the beads of the dimer. We conjecture that a countable infinity of family of solitary waves can be realized in 1:2 dimer chains. Interestingly, solitary waves in a general 1:N (N>2) dimer chain are far more difficult to realize. For the case of 1:2 dimers, we can vary the two parameters to satisfy conditions such that the oscillatory tails in the trail of the primary pulse of the two light beads decay to zero. In contrast, for a 1:N (N>2) dimer chain, we have the same two parameters but need to satisfy the decaying conditions on N light beads simultaneously. This leads to a mathematically ill-posed problem and as such rigorously no solitary waves can be realized in general.
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Roth, R., F. Duckert, and G. Marbet. "A MONITORING PARAMETER IN THROMBOLYSIS?" In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643142.

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D-dimers are specific derivatives of cross-linked fibrin. Their concentration may be used to conduct thrombolysis and predict its outcome. In this investigation we studied the relationship between D-dimer plasma levels during thrombolysis of deep leg vein thrombosis (DVT) and the phlebographic success.METHODS: 17 patients (9 males, 8 females, age range 17-56 years) were studied. All patients had DVT and were treated with either an acylated streptokinaseplasminogen complex (n=lO) or streptokinase (n=5) or both drugs successively (n=2) for 4.6 days on average. The thrombolytic effect was assessed by ascending phlebography and the patients were divided into 3 groups: A complete clearance, B partial clearance, C no change. The D-dimers were measured by a non-competitive EIA assay with a monoclonal antibody against a conformational epitope on the plasmin-resistant D-dimer, fragment of cross-linked fibrin.RESULTS: The table gives the mean D-dimer levels in the 3 groups of patients at 12 hours intervals.The statistical analysis (Newman-Keuls multiple range test) suggests that low D-dimer levels, especially over the first 36 hours are related to treatment failures.CONCLUSIONS: Despite some overlapping between successful and non-successful cases and lack of absolute specificity of the assay the D-dimer concentration may predict treatment failure in the first two days.
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Cockroft, Nigel J., and Keith M. Murdoch. "Dimer-dominated materials for upconversion applications." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.mj7.

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In many laser materials ionic dopants adopt nominally random spatial distributions. Consequently, information on energy transfer processes must be convoluted by using models for the distribution of separations between ions. For energy transfer upconversion lasers such a distribution results in some dopant ions absorbing pump excitation but being too isolated to contribute to the upconversion process. CsCdBr3 is one of a class of novel materials that preferentially accommodate trivalent dopant ions in a single dimer configuration. The inter-ion separation of approximately 6 A enables efficient energy transfer and allows for the use of simple single-rate analysis models. This paper demonstrates the powerful use of CsCdBr3 as a tool to unravel energy transfer processes and illustrates its potential use as an efficient and versatile upconversion laser host. Single and dual laser pumped infrared to visible upconversion investigations on Er3+ ion dimers and heterogeneous Tm3+/Pr3+ ion dimers are reported. Mechanisms for the excitation wavelength controlled dominance of violet, green, or red Er3+ emission and the mechanism for blue Pr3+ emission after near- IR Tm3+ excitation are determined.
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Buehler, Markus J., and Zhao Qin. "Structure Prediction and Nanomechanical Properties of Human Vimentin Intermediate Filament Dimers." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-204824.

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Intermediate filaments (IFs), in addition to microtubules (MTs) and microfilaments (MFs), are one of the three major components of the cytoskeleton in eukaryotic cells. As the basic building block of IFs, the properties of the IF dimmer re crucial to fully understand the molecular basis for the properties of the IF network in cells. However, the structure of IF dimers remains unknown, which has thus far prevented the elucidation of its nanomechanical properties, in particular molecular-level mechanisms of deformation. Here we present the development of a full atomistic molecular model of the vimentin dimmer, a coiled-coil structure consisting of four alpha-helixes (AHs). The structure is found to be stable in molecular dynamics simulation after an extensive equilibration process. After careful structure prediction, the behavior of the IF dimer under mechanical stress is investigated; including studies of changing the pulling velocity and a detailed analysis of the associated deformation and rupture mechanisms. Most notably, we observe a transition of AHs to beta-sheets (BSs) under mechanical deformation, as has been observed indirectly in earlier experimental studies. Our result helps to better understand the structure and fracture mechanism of this important protein filament.
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Stoutland, Page O., Stephen K. Doom, R. Brian Dyer, and William H. Woodruff. "Picosecond Infrared Study of Ultrafast Electron Transfer and Vibrational Energy Relaxation in [(NC)5RuIICNRuIII(NH3)5]1-." In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/up.1992.md3.

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Mixed-valent transition metal dimers have become key systems for understanding many fundamental aspects of electron transfer dynamics.1 We have been interested in the mixed-valent dimer [(NC)5RuIICNRum(NH3)5]1- for which optical excitation into the metal-metal charge transfer (MMCT) band produces a state which is highly unstable with respect to back electron transfer.
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Schnell, Melanie, and Sergio Domingos. "THE STYRENE OXIDE DIMER STORY." In 74th International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2019. http://dx.doi.org/10.15278/isms.2019.rh01.

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Li, Xiaochuan, Sheng Wang, and He Tian. "Photochromism of a diarylethene dimer." In Seventh International Symposium on Optical Storage (ISOS 2005), edited by Fuxi Gan and Lisong Hou. SPIE, 2005. http://dx.doi.org/10.1117/12.649672.

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Hauch, O., H. Nerstrøm, T. R. Kølle, L. N. Jørgensen, P. Wille-Jørgensen, and H. Neerstand. "PLASMA CROSSLINKED FIBRIN DEGRADATION PRODUCTS FRACTION D (D-DIMER) IN PATIENTS UNDERGOING ELECTIVE MAJOR ABDOMINAL SURGERY AND IN HEALTHY VOLUNTEERS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643136.

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An increased plasma level of D-dimer has been suggested as an indicator of postoperative thromboembolism (TE). We studied the D-dimer level in patients undergoing major elective abdominal surgery and in healthy volunteers to evaluate a possible value of D-dimer as a screening test for TE. 18 patients and 5 healthy volunteers were studied. The patients received low molecular weight heparin (Logiparin TM) subcutaneously once . daily for 7 days. The 125 I-fibrinogen uptake test (FUT) was done in all patients. Blood samples were taken preoperatively, postoperatively and on the postoperative day 1, 3, 4, 5 and 6. The volunteers had blood samples taken before and 4 hours after subcutaneous Logiparin injection. D-dimer was assayed by enzyme-immunoassay (Boehringer Mannheim, Elisa D-dimer, Cat.no. 998117). Results are given as median with 95% confidence limits in brackets.One patient developed deep venous thrombosis verified by phlebography. Two patients had abnormal FUT but normal phlebography. The plasma level for D-dimer in the 15 patients with normal FUT was 500 ng/ml (300-800) preoperatively. The D-dimer level increased postoperatively to 1700 ng/ml (900-3300) (p < 0.001). The following days the D-dimer level increased steadily to 4800 ng/ml (2600-6800) 6 days postoperatively. The plasma level of D-dimer in the volunteers were less than 110 ng/ml both before and after injection of Logiparin. The plasma level of D-dimer in the patient with deep venous thrombosis and the 2 patients with abnormal FUT were within the range of the patients with normal FUT.The postoperative D-dimer level was as high as that reported in patients with diagnosed thromboembolism.In conclusion, the D-dimer test does not seem to be a potential screening test for postoperative thromboembolism.
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Wilde, J. T., S. Kitchen, F. E. Freston, and M. Greaves. "A COMPARISON OF D-DIMER AND SERUM FIBRINOGEN/FIBRIN DEGRADATION PRODUCT LEVELS (F.D.P.’s) IN THE INVESTIGATION OF HYPERCOAGULABLE STATES." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643138.

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D-Dimer assays measure specific breakdown products of crosslinked fibrin whereas FDP assays are not specific for these products. We have, therefore, measured D-Dimer levels (MabCo Dimer Test) semi-quantitatively in patients with clinical and laboratory evidence of disseminated intravascular coagulation, acute and chronic liver disease, acute leukaemia at presentation and acute venous thrombosis at diagnosis. We have also measured D-Dimer in the 3rd trimester of normal pregnancy and in pregnancies with complications. We compared these levels with F.D.P. levels measured by the Thrombo-Wellcotest. Patients with liver disease comprised mainly cirrhosis and acute viral hepatitis; those with venous thrombosis had this diagnosis confirmed by venography. Pregnancy complications included mainly pre-eclampsia, ante-partum haemorrhage and intra-uterine foetal death. D-Dimer levels were elevated ( 200ng/ml) in all 31 patients with D.I.C., in 34 of 40 with liver disease, in 13 of 16 with acute leukaemia, in all 10 patients with D.V.T., in 9 of 16 normal pregnancies and in 29 of 39 complicated pregnancies. Using a rank correlation method, there was correlation between D-Dimer and F.D.P. levels (Normal 8ug/ml) in the following groups of patients as follows (r is the correlation coefficient, levels of significance are shown in brackets):D.I.C. r=0.72(0.2%), liver disease r=0.56(0.2%), acute leukaemia r=0.72(0.2%), D.V.T. r=0.83(1%) and complicated pregnancy r=0.42(1)6). There was no correlation between D-Dimer and F.D.P. levels in normal pregnancy. Very rarely were D-Dimer levels elevated when F.D.P. levels were normal and vice-versa. We conclude that a close relationship does exist between D-Dimer and F.D.P. levels in the clinical conditions that we have studied. We note the high incidence of elevated D-Dimer levels and the close correlation with F.D.P. levels in patients with liver disease and the high incidence of elevated D-Dimer levels suggesting increased activity of the coagulation system in patients with acute leukaemia.
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Dmitriev, Alexey A., and Mikhail V. Rybin. "Coupling regimes of high-index dimer." In 2018 Days on Diffraction (DD). IEEE, 2018. http://dx.doi.org/10.1109/dd.2018.8553419.

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Reports on the topic "Dimer of dimer"

1

Yao, Jian. NMR Study of Neurophysin Dimer Dissociation by Cosolvents. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.7085.

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Wung, A. Simulated X-Ray Absorption Spectroscopy on the Water Dimer. Office of Scientific and Technical Information (OSTI), February 2004. http://dx.doi.org/10.2172/826722.

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Stirling, Shannon, Sudipta Majundar, Jaeju Ko, and John Ford. Monomer-dimer Equilibrium of Mycobacterium tuberculosis Alanine Racemase Depends on Buffer Conditions. Journal of Young Investigators, April 2019. http://dx.doi.org/10.22186/jyi.36.4.50-54.

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Hou, Hongtao. The reaction dynamics of alkali dimer molecules and electronically excited alkali atoms with simple molecules. Office of Scientific and Technical Information (OSTI), December 1995. http://dx.doi.org/10.2172/206522.

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Ma, Mingsheng, Run Cao, Wei Wang, Biying Wang, Yichen Yang, Yunchao Huang, Guangqian Zhao, and Lianhua Ye. The D-dimer level predicts the prognosis in patients with lung cancer：A systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, July 2021. http://dx.doi.org/10.37766/inplasy2021.7.0096.

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Ramsey, Alexandra. A Hard X-ray Study of a Manganese-Terpyridine Dimer Catalyst in a Chromium-Based Metal Organic Framework. Office of Scientific and Technical Information (OSTI), August 2015. http://dx.doi.org/10.2172/1213117.

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Werst, D. W. Observation of an aromatic radical anion dimer: (C{sub 10}F{sub 8}){sub 2}{sm_bullet}{sub {minus}}. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10134196.

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Bao, Qiangji, Jing-Ni Zhang, Xin-Ting Wu, Kai Zhao, Yu Guo, Mingfei Yang, and Xiao-Feng Du. Clinical significance of plasma D-dimer and fibrinogen in outcomes after stroke: A Systematic Review and Meta-Analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, January 2022. http://dx.doi.org/10.37766/inplasy2022.1.0025.

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Ramsey, Alexandra. A Hard X-ray Study of a Manganese-Terpyridine Dimer Catalyst in a Chromium-based Metal Organic Framework - Oral Presentation. Office of Scientific and Technical Information (OSTI), August 2015. http://dx.doi.org/10.2172/1213175.

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Johnson, S. Spectral hole burning and flourescence studies of a synthetic chlorophyll dimer, a bacterial antenna system and a bacterial reaction center. Office of Scientific and Technical Information (OSTI), June 1990. http://dx.doi.org/10.2172/6994515.

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