Relevant bibliographies by topics / Complexing agents

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Complexing agents'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Complexing agents"

1

Birch, L., and R. Bachofen. "Complexing agents from microorganisms." Experientia 46, no. 8 (August 1990): 827–34. http://dx.doi.org/10.1007/bf01935533.

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Sýkora, Vladimı́r, Pavel Pitter, Iva Bittnerová, and Tomáš Lederer. "Biodegradability of ethylenediamine-based complexing agents." Water Research 35, no. 8 (June 2001): 2010–16. http://dx.doi.org/10.1016/s0043-1354(00)00455-3.

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BIRCH, L., and R. BACHOFEN. "ChemInform Abstract: Complexing Agents from Microorganisms." ChemInform 22, no. 7 (August 23, 2010): no. http://dx.doi.org/10.1002/chin.199107345.

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Chen, Liang Yan, Chao Fang, and Xi Qu Chen. "Calculation of Complexion in Chemical Precursor for ZnSe as Buffer-Window Layer of CIGS Solar Cell." Advanced Materials Research 1070-1072 (December 2014): 604–7. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.604.

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With ammonia and hydrazine hydrate as complexing agents, ZnSe has been deposited as the buffer-window layer of solar cells from chemical solution, in which the complexion played vital role in controlling the film growth. We calculated various complexion in chemical solution deposited ZnSe precursor with solubility theory. And the main complexion and their concentration with adding of complexing agents and pH value have been investigated. And we found that the main complexion are Zn (NH3)32+ and Zn (NH3)42+, the concentration of which varied with the adding of ammonia and pH value.
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Arce, Heilen, and Mavis L. Montero. "Use of Complexing Agents in Hydroxyapatite Synthesis." Key Engineering Materials 396-398 (October 2008): 293–96. http://dx.doi.org/10.4028/www.scientific.net/kem.396-398.293.

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Production of calcium phosphates from homogeneous solutions of Ca2+ and PO43- are studied in presence of complexing agents such as acetic acid, lactic acid, etilendiaminotetracetic acid (EDTA), iminodietanoic acid, and malic acid; solids are characterized with infrared spectroscopy (IR), powder x-ray diffraction, scanning electron microscopy (SEM) and electron dispersion spectra (EDS). The objective for this experiment was to find a suitable complexing agent to produce hydroxyapatite under mild reaction conditions. With the methodology described only tree phases are produced: brushite, monetite and hydroxyapatite. It is found a relationship among the ligand and the calcium phosphate phase obtained, where the complexing agent that provides the best working conditions for hydroxyapatite production is EDTA.
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Crego, Mercedes, J. José Marugán, César Raposo, Ma José Sanz, Victoria Alcázar, Ma Cruz Caballero, and Joaquín R. Morán. "Three complexing agents for ureas and formamides." Tetrahedron Letters 32, no. 33 (August 1991): 4185–88. http://dx.doi.org/10.1016/s0040-4039(00)79900-x.

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Iacovino, Rosa, Jolanda Caso, Cristina Donato, Gaetano Malgieri, Maddalena Palmieri, Luigi Russo, and Carla Isernia. "Cyclodextrins as Complexing Agents: Preparation and Applications." Current Organic Chemistry 21, no. 2 (December 8, 2016): 162–76. http://dx.doi.org/10.2174/1385272820666160909111842.

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Gan, W., M. Cao, B. Crozier, and Q. Liu. "Inhibiting Quartz-Bitumen Coagulation by Complexing Agents." Canadian Metallurgical Quarterly 46, no. 3 (September 2007): 207–14. http://dx.doi.org/10.1179/cmq.2007.46.3.207.

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Arbel, Amira, Iony Katz, and Sara Sarig. "Dissolution of hydroxyapatite by calcium complexing agents." Journal of Crystal Growth 110, no. 4 (April 1991): 733–38. http://dx.doi.org/10.1016/0022-0248(91)90630-n.

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Samigulina, L. A., A. V. Velichko, and L. B. Pavlovich. "SYNTHESIS OF METAL-PHTHALOCYANINES WITH VARIOUS COMPLEXING AGENTS." Izvestiya Visshikh Uchebnykh Zavedenii. Chernaya Metallurgiya = Izvestiya. Ferrous Metallurgy 55, no. 8 (January 1, 2012): 3–6. http://dx.doi.org/10.17073/0368-0797-2012-8-3-6.

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Dissertations / Theses on the topic "Complexing agents"

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Oldfield, Nigel Leigh. "Thiazole-containing natural and non-natural metal-complexing agents." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311763.

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Hagemann, Justin Philip. "Design, synthesis and evaluation of novel, metal complexing agents." Thesis, Rhodes University, 1997. http://hdl.handle.net/10962/d1004965.

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Various chelating ligands have been designed and synthesised; these include amino-amide ligands, tetraacetic acid systems and sulfur-containing amide ligands. Difficulties in the synthesis and purification of the amino-amide ligands were largely overcome, permitting the mono acylation of ethylenediamine and the synthesis of bis(2-aminoethyl)-2-benzylpropanediamide. Novel tetraacetic acid ligands, based on the propanediamide backbone and targeted as EDTA analogues, were obtained from their methyl and benzyl esters; but the instability of the tetraacids prevented their full characterisation. Bidentate, tridentate and tetradentate sulfur-containing monoamide ligands, based on the ortho-thio acetanilide moiety, were designed to specifically chelate platinum and palladium in the presence of base metals. In their synthesis, thiocyanation was used to introduce the orth-thio group on para-substituted anilines, and further functionalisation was achieved via appropriate protection of nucleophilic sulfur moieties. A range of tetradentate, sulfur-containing diamide ligands was also synthesised by reacting substituted 2-mercaptoacetanilides with 1,2- dibromoethane. Novel ligands were characterised by spectroscopic (¹H and ¹³C NMR; IR and M S) techniques and elemental (combustion and high resolution MS) analysis. Computer modelling and ¹H NMR chemical shift data have been used to explore the conformational preferences of the sulfur-containing acetanilide ligands. The macrocyclic ligands and systems with ortho-methylthio substituents appear to exhibit the greatest degree of coplanarity of the aromatic and amide functions. Solvent extraction studies revealed that the sulfur-containing amide ligands selectively extracted palladium(II) from platinum(II), copper(II}, nickel(II} and cobalt(II}. Even though the palladium(II} was extracted from an acidic medium, certain monoamide ligands were able to complex palladium(II) through their sulfur and deprotonated amide nitrogen donors, a trithia monoamide ligand being observed to displace all the chloride ligands on palladium to form a monomeric tetracoordinate complex. The diamide ligands, however, appeared to favour extraction of palladium(II) by coordination through their sulfur donors, forming 5-membered sulfur-sulfur chelates. In basic media (pH 8-9), selected sulfur-containing monoamide and diamide ligands have been shown to complex platinum(II) and palladium(II) through their sulfur and deprotonated amide nitrogen donors. At neutral pH, a dimercapto monoamide ligand has been shown to complex platinum from cisplatin with partial expulsion of the ammine ligands, while a macrocyclic trithia monoamide ligand has been observed to complex platinum from tetrachloroplatinate with concomitant deprotonation of the amide nitrogen. Where possible, the complexes were characterised by infrared and ¹H NMR spectroscopy and have also been studied using the computer modelling soft-ware programmes, Momec® and Hyperchem®.
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Arwidsson, Zandra. "Organic complexing agents for remediation of heavy metal contaminated soil /." Örebro : Örebro University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-7913.

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Reinoso-Maset, Estela. "Aqueous and solid phase interactions of radionuclides with organic complexing agents." Thesis, University of Plymouth, 2010. http://hdl.handle.net/10026.1/300.

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Characterising the geochemistry and speciation of major contaminant radionuclides is crucial in order to understand their behaviour and migration in complex environmental systems. Organic complexing agents used in nuclear decontamination have been found to enhance migration of radionuclides at contaminated sites; however, the mechanisms of the interactions in complex environments are poorly understood. In this work, radionuclide speciation and sorption behaviour were investigated in order to identify interactions between four key radionuclides with different oxidation states (Cs(I) and Sr(II) as important fission products; Th(IV) and U(VI) as representative actinides), three anthropogenic organic complexing agents with different denticities (EDTA, NTA and picolinic acid as common co-contaminants), and natural sand (as simple environmental solid phase). A UV spectrophotometric and an IC method were developed to monitor the behaviour of EDTA, NTA and picolinic acid in the later experiments. The optimised methods were simple, applied widely-available instrumentation and achieved the necessary analytical figures of merit to allow a compound specific determination over variable background levels of DOC and in the presence of natural cations, anions and radionuclides. The effect of the ligands on the solubility of the radionuclides was studied using a natural sand matrix and pure silica for comparison of anions, cations and organic carbon. In the silica system, the presence of EDTA, NTA and, to a lesser extent, picolinic acid, showed a clear net effect of increasing Th and U solubility. Conversely, in the sand system, the sorption of Th and U was kinetically controlled and radionuclide complexation by the ligands enhanced the rate of sorption, by a mechanism identified as metal exchange with matrix metals. Experiments in which excess EDTA, NTA and picolinic acid (40 – 100 fold excess) were pre-equilibrated with Th and U prior to contact with the sand, to allow a greater degree of radionuclide complex formation, resulted in enhanced rates of sorption. This confirmed that the radionuclide complexes interacted with the sand surface more readily than uncomplexed Th or U. Overall this shows that Th and U mobility would be lowered in this natural sand by the presence of organic co-contaminants. In contrast, the complexation of Sr with the complexing agents was rapid and the effect of the ligands was observed as a net increase on Sr solubility (EDTA, picolinic acid) or sorption (NTA). As expected, Cs did not interact with the ligands, and showed rapid sorption kinetics. Finally, ESI-MS was used to study competitive interactions in the aqueous Th-Mn-ligand ternary system. Quantification presented a challenge, however, the careful approach taken to determine the signal correction allowed the competitive interactions between Mn and Th for EDTA to be studied semi-quantitatively. In an EDTA limited system, Th displaced Mn from the EDTA complex, even in the presence of a higher Mn concentration, which was consistent with the higher stability constant of the Th-EDTA complex.
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Drummond, Laurel A. "Structural basis for the design of selective complexing agents for transition metals." Thesis, London Metropolitan University, 1989. http://repository.londonmet.ac.uk/3422/.

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X-ray crystallographic analyses of a group of salicylaldoxime ligands, and their copper(II) complexes were carried out. The three of the copper(II) complexes studied, bis-(2-hydroxy-5-methylbenzaldehydeoximato)copper(II), [(L1)2Cu]n, bis-(2-hydroxy-5-methylbenzophenoneoximato)copper(II), [(L5 )2Cu] and bis-(2-hydroxy-3-t-butyl-methylbenzaldehydeoximato)copper(II), [(L7 )2Cu], existed as centrosymmetric molecules, with the copper atom at crystallographic inversion centre. Two bidentate ligands produce a planar arrangement of donor atoms around the copper. The molecules reassemble macrocyclic systems, due to effective intramolecular hydrogen bonding linking the two ligands. To correlate chelating properties with intramolecular H-bond strengths an X-ray structural analysis was carried out on one ligand supplied by ICI, and thought to be 3,5-dimethyl-2-hydroxy acetophenone methoxyimine. Unexpectedly the molecule was found to be 3,5-dimethyl-4-hydroxy acetophenone methoxyimine. This was successful in explaining the anomolously low efficiency of extraction for copper(ll), shown by the related n-nonyl oxime ligand. It is thought that the presence of syn and anti isomers in 2-hydroxybenzophenone oximes accounts for the low efficiency of copper extraction shown by reagents which contain this chelating unit. The syn and anti forms, of 2-hydroxy-5-methylbenzophenone oxime (L5H) were prepared separately. Significantly both forms appear to yield [L5]2CH] when treated with Cu(CH3CO2)2.H20 in a homogeneous solution, although there are indications that formation of the complex from the syn-form is slower. Selectivity of complexation of metal ions by macrocyclic ligands were investigated. The stability constant data of zinc(II) and cadmium(II) complexes of a series of cyclic quadridentate ligands were compared. For the 15-membered N4 macrocyle L15, the propyl (L15p) and butyl (L15b) C-alkylated derivatives were synthesised for the first time, and the cadmium(II) complex of (L15b) was prepared. X-ray analysis were performed on the free ligand L15b, and the three metal complexes [Zn(L15)(NO3)(H2O)]NO3, [Cd(15)(NO3)NO3, and [Cd(L15b)(NO3)NO3. These results were then correlated with the results of stability constant measurements in discussing the probable behaviour of the ligands in the solution environment and hence to provide some insight into the effect of alkylation on the discrimination for zinc(II) over cadmium(II). The discrimation for zinc over cadmium is decreased on alkylation and the reason for this is discussed.
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Shackleton, Natalie Jean. "The role of complexing agents in the flotation of pentlandite-pyroxene mixtures." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/10976.

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Bibliography: leaves 137-146.
This study examines the role complexing agents play in pentlandite-pyroxene flotation and focuses on the surface chemistry and interaction between valuable and gangue minerals as well as the interaction of complexing agents and reagents (xanthate, copper sulphate) in the system at pH 9. Microflotation, zeta potential measurements, ToF-SIMS analyses (time of flight secondary ion mass spectrometry) and X-ray photoelectron spectroscopy (XPS) were used as tools in determining the extent of surface alteration.
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Maketon, Worawan. "Treatment of Cu-CMP Waste Streams Containing Copper(II) using Polyethyleneimine (PEI)." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/193929.

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The semiconductor industry has been growing at a fast pace in the last several decades and this growth is expected to continue in the future. One process that is repeated several times in a microchip fabrication is the Chemical Mechanical Planarization (CMP). CMP is a critical process that must be employed after the metal deposition step to eliminate any topography over which the next layer must be processed. Today, copper interconnect is widely used. In addition to possess a high resistance to electro migration effects and low electrical resistivity, copper techniques require fewer (approximately 25%) processing steps. CMP and post-CMP cleaning processes are projected to account for 50 percent of the water consumed by fabrication's ultra pure water. While there are a variety of treatment schemes currently available for the removal of heavy metals from CMP wastewater streams, many introduce additional chemicals to the process, have large space requirement, or are not effective. Polyethyleneimine (PEI) is well known to use in the ion metal affinity chromatography (IMAC) due to the great metal ion binding abilities. While work has been conducted on the use of PEI on membrane filtration for binding metals from industrial wastewaters, the experiments performed in this research are novel with respect to the waste (Cu CMP) treated as well as the method of packed bed column treatment. This research focused primarily on the study of an alternative technique to remove both metal ions and metal-chelated complexes from Cu CMP wastewater streams. Not only copper, wastewater often contains chelating agents, surfactant, organic compounds, and inhibitors. Thus, most of the time copper ions form complexes with chelating agents, which made typical ion exchange resins ineffective. The work, then, explored the effect of components typically found in Cu CMP waste streams on the binding of copper ions to PEI. The competitive binding of copper between PEI and other complexing agents were also investigated. A secondary focus of this study was to fully develop and characterize the column performance and behavior. This includes the understanding of the chemistry of CMP waste characterization. This treatment technique using a PEI packed bed column showed great copper binding capacity. The column is capable of removing Cu CMP waste streams, which contain both copper ions and copper complexes, due to the unique ability of PEI that can play both cation and anion exchanger roles. This waste treatment technique is feasible for the semiconductor industry as large volumes of copper contaminated solutions from actual waste can be concentrated twelve-fold for metal recovery using hydrochloric acid. The adsorbent can be regenerated more than hundred of times with changing in the performance and the reproducibility.
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Ritschel, Jens. "Extraction of heavy metals from soil with selected biodegradable complexing agents diploma thesis /." Zürich : ETH, Eidgenössische Technische Hochschule Zürich, ITÖ, Institut für terrestrische Ökologie, 2003. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=110.

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Poon, Grace Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "Bromine complexing agents for use in vanadium bromide (V/Br) redox flow cell." Publisher:University of New South Wales. Chemical Sciences & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41210.

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The Vanadium bromide (V/Br) flow cell employs the Br3-/Br- couple in the positive and the V(II)/V(III) couple in the negative half cell. One major issue of this flow cell is bromine gas formation in the positive half cell during charging which results from the low solubility of bromine in aqueous solutions. Bromine complexing agents previously used in the zinc-bromine fuel cell were evaluated for their applicability in V/Br flow cell electrolytes. Three quaternary ammonium bromides: N-ethyl-N-methyl-morpholinium bromide (MEM), N-ethyl-N-methyl-pyrrolidinium bromide (MEP) and Tetra-butyl ammonium bromide (TBA) were studied. It is known that aqueous bromine reacts with quaternary ammonium bromides to form an immiscible organic phase. Depending on the number of quaternary ammonium bromides used and the environmental temperature, the second phase formed will either be solid or liquid. As any solid formation would interrupt the flow cell operation, potential formation of such kind has to be eliminated. Stability tests of simulated V/Br electrolyte with added quaternary ammonium bromides were carried out at 11, 25 and 40 oC. In the absence of bromine, the addition of MEM, MEP and TBA were found to be stable in V/Br electrolytes. However, in the presence of bromine, solid formation was observed in the bromine rich organic phase when the V/Br electrolyte contained a single quaternary ammonium bromide (QBr) compound. For V/Br electrolytes with binary or ternary QBr mixtures containing TBA, the presence of bromine caused a viscous polybromide phase to form at room temperature and the release of bromine gas at higher temperature. Only a binary mixture of MEM and MEP formed a stable liquid organic phase between 11 ?? 40 oC. In this study it was found that V/Br electrolytes containing a binary QBr mixture (0.75M) of MEM and MEP gave the best combination that formed an orange oily layer in the presence of bromine without solidification between 11 ?? 40oC. Furthermore, it was found that samples of V/Br electrolytes containing a ternary QBr mixture, are less effective in bromine capturing if the total QBr concentration was less than 1 M at 40oC, where bromine gas evolution was observed. From electrochemical studies of V3+/V2+, it was found that the addition of MEM and MEP had a minimal effect on the formal potential of the V3+/V2+ couple, the V2+/V3+ transfer coefficient and the diffusion coefficient of V3+. Therefore, MEM and MEP can be added to the negative half-cell of a V/Br flow cell without major interference From linear sweep voltammetry, the kinetics of the Br-/Br3- redox couple was found to be mass transfer controlled. After the addition of MEM and MEP mixture, the exchange current density was found to decrease from 0.013 Acm-2 to 0.01 Acm-2. On the other hand the transfer coefficient before and after MEM and MEP addition was found to be 0.5 and 0.44 respectively. Since the kinetic parameters were not significantly affected by the addition of MEM and MEP mixture, they can be added to the positive half-cell of the V/Br flow cell as bromine complexing agents. The electrochemical studies of both V3+/V2+ and Br-/Br3- showed the addition of MEM and MEP has minimal interference with the redox reactions of the vanadium bromide flow cell. This thesis also investigated the effect of MEM and MEP addition on the cell performance of a lab scale V/Br flow cell using two different membranes (ChiNaf and VF11). Flow cell performance for 2 M V3.7+ + 0.19 M MEM + 0.56 M MEP electrolytes utilising ChiNaf membrane at 10 mAcm-2 produced an energy efficiency of 59%, and this decreased to 43% after 15 cycles. For the static cell utilising VF11 membrane, the addition of MEM and MEP reduced the energy efficiency from 59.7% to 43.4%. It is believed that this is caused by the mass transfer controlled Br-/Br3- couple in the complexed positive half-cell solution. Therefore, uniformity between the organic and aqueous phase is important for flow cells utilising electrolytes with MEM and MEP. Finally, the polarization resistance of a lab scale V/Br flow cell utilising ChiNaf membrane and 2 M V3.7+ electrolytes was found to be slightly higher during cell charging (3.9 cm2) than during the discharge process (3.6 cm2), which is opposed to that in the all-vanadium redox cell.
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McClymont, John Douglas. "ESR studies of the effects of complexing agents on radiation damage in DNA." Thesis, University of Leicester, 1990. http://hdl.handle.net/2381/33802.

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The effects of a range of complexing agents on the radiation damage routes in frozen aqueous DNA have been analyzed by ESR techniques in a semi-quantitative way. Establishment of additive-free DNA standards for this study revealed an ESR pattern different from the four elementary shapes which contributed ∼ 13X of the total spin seen after annealing to 210 K. It is proposed that this represents a population of sugar radicals; hitherto unseen intermediates in additive-free systems between secondary base radicals and strand breaks. The intercalating aminoanthraquinones, mitoxantrone and ametantrone, were found to compete very efficiently with thymine for electron capture, and behaved as protecting agents. Concomitant strand break studies did not support this, and more extensive ESR studies suggested that the intercalator radical centre could also lead to strand breaks. It is therefore proposed that the mode of action of these drugs does not involve free radical processes in DNA. Use of these agents provided evidence that electron migra tion in DNA is much more extensive than previously thought. Copper ions were found to reduce the amounts of T/TH detected, with no effect on G . During this evaluation, evidence appeared for the existence of a site on DNA that could bind two Cu(II) ions so close together that they became ESR silent. Of special interest was the finding that this binding was preferred over that of single Cu(II) ions, and it is proposed that this might have a physiological significance. The dominance of thymine over cytosine as the site of electron capture is reinforced by the above studies, but it is suggested that it is the nature of the system under study that determines the ratio of T to C.
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Books on the topic "Complexing agents"

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Thomas, Russell. The biodegradation of complexing agents used in the nuclear fuel cycle. Birmingham: University of Birmingham, 1997.

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Demazeau, Yves, Bo An, Javier Bajo, and Antonio Fernández-Caballero, eds. Advances in Practical Applications of Agents, Multi-Agent Systems, and Complexity: The PAAMS Collection. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94580-4.

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Bajo, Javier, Juan M. Corchado, Elena María Navarro Martínez, Eneko Osaba Icedo, Philippe Mathieu, Patrycja Hoffa-Dąbrowska, Elena del Val, et al., eds. Highlights of Practical Applications of Agents, Multi-Agent Systems, and Complexity: The PAAMS Collection. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94779-2.

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Poli, Roberto, and Marco Valerio, eds. Anticipation, Agency and Complexity. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-03623-2.

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A, Barnett William, Deissenberg Christophe, and Feichtinger Gustav 1940-, eds. Economic complexity: Non-linear dynamics, multi-agents economies, and learning. Amsterdam: Elsevier, 2004.

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The complexity of cooperation: Agent-based models of competition and collaboration. Princeton, N.J: Princeton University Press, 1997.

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North, Michael J. Managing business complexity: Discovering strategic solutions with agent-based modeling and simulation. New York, NY: Oxford University Press, 2006.

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1969-, Janssen Marco, ed. Complexity and ecosystem management: The theory and practice of multi-agent systems. Cheltenham, UK: Edward Elgar, 2002.

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North, Michael J. Managing business complexity: Discovering strategic solutions with agent-based modeling and simulation. New York: Oxford University Press, 2006.

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Batty, Michael. Cities and complexity: Understanding cities with cellular automata, agent-based models, and fractals. Cambridge, Mass: MIT Press, 2005.

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Book chapters on the topic "Complexing agents"

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Schmidt, Carsten K., and Heinz-Jürgen Brauch. "Aminopolycarboxylate Complexing Agents." In Organic Pollutants in the Water Cycle, 155–80. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/352760877x.ch7.

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Kuznetsov, Yurii I., A. D. Mercer, and J. G. N. Thomas. "Corrosion Inhibitors Based on Complexing Agents." In Organic Inhibitors of Corrosion of Metals, 173–224. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4899-1956-4_4.

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Regnouf-de-Vains, J. B. "Some New Calix[4]Arene-Based Complexing Agents." In Molecular Recognition and Inclusion, 233–38. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5288-4_30.

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Schmid, G., O. S. Huber, and H. J. Eberle. "Selective Complexing Agents for the Production of γ-Cyclodextrin." In Proceedings of the Fourth International Symposium on Cyclodextrins, 87–92. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2637-0_14.

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Kittsteiner, Ursula, Agnieszka Mostowska, Heike Malinowski, and Wolfhart Rüdiger. "Influence of 5-Aminolevulinate and Complexing Agents upon Chlorophyll Accumulation." In Current Research in Photosynthesis, 2585–88. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0511-5_583.

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Buergi, H. B. "Recognition of Convex Fullerene Molecules by Concave Complexing Agents. Structure and Reactivity." In Current Challenges on Large Supramolecular Assemblies, 145–55. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-5284-6_11.

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Egli, Thomas. "Biochemistry and physiology of the degradation of nitrilotriacetic acid and other metal complexing agents." In Biochemistry of microbial degradation, 179–95. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1687-9_6.

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Martinez-Jimenez, Eliezer, and Gretchen T. Lapidus. "The Effect of Complexing Agents and the Anode Material on the Kinetics of Electro-Assisted Reduction of Chalcopyrite." In T.T. Chen Honorary Symposium on Hydrometallurgy, Electrometallurgy and Materials Characterization, 217–24. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118364833.ch19.

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Abramsky, Samson. "Logic and Geometry of Agents in Agent-Based Modeling." In Computational Complexity, 1767–80. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-1800-9_113.

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Gooch, Jan W. "Complexing Agent." In Encyclopedic Dictionary of Polymers, 160. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2735.

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Conference papers on the topic "Complexing agents"

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Ionascu, L., M. Nicu, C. Turcanu, F. Dragolici, and Ghe Rotarescu. "XRD Studies of Cement Embedding Matrices Containing Complexing Reagents From Decontamination Practices." In ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96062.

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The study of embedding matrix of radioactive waste is an important issue concerning the need to assure the radiological safety requirements for final disposal. The conditioning of the radioactive wastes by cementation process involves also a structural investigation by X-ray diffraction (XRD) of the samples prepared with cement and complexing agents at different concentration. This paper gives useful information about the influence of complexing agents related to damages produced in concrete microstructures. The experimental data obtained on samples kept in real repository environment for a period up to 15 years, offer structural information regarding the interaction between the different decontamination agents with the major components of the matrix.
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Yang, Yundian, Shengli Wang, Chenwei Wang, and Yuanshen Cheng. "Effect of Various Complexing Agents for Cobalt “bulk step” Chemical Mechanical Planarization." In 2020 China Semiconductor Technology International Conference (CSTIC). IEEE, 2020. http://dx.doi.org/10.1109/cstic49141.2020.9282592.

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Park, Sang Yong, Jeong Eun Park, Jeong Hun Park, Jackson Bweupe, So Mang Park, Chaehwan Jeong, and Donggun Lim. "Optical and Structural Properties of ZnS Thin Films with Various Complexing Agents." In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). IEEE, 2018. http://dx.doi.org/10.1109/pvsc.2018.8547690.

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Qin, Hantang, Jingyan Dong, and Yuan-Shin Lee. "Electrohydrodynamic Jet Printing of Silver Seeds: Micro Scale Patterning by Electroless Copper Deposition." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9487.

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The paper describes a new method for micro scale patterning of highly conductive features on flexible and flat surfaces. The method uses electrohydrodynamic jet printing to deposit silver seeds on-demand that serve as catalysts for subsequent electroless deposition of copper. The electroless deposition of copper on substrates occurred only where silver seeds exist. In the study, ethylenediaminetetraacetic acid (EDTA) and triethanolamine (TEA) were used as chelating agents, and formaldehyde as reducing agent. Copper growth rate and resistivity were investigated using microscopic and profilometer to determine optimal concentration of each agents in reaction solution. The results indicated that EDTA significantly affects copper growth rate, playing an important role in complexing, while TEA in the dual-complexing system will balance deposition rate and stability of solution. Optimal temperature and time for copper deposition on silver nanoparticles were also discussed in the study. The techniques of activating substrates by selective printing and electroless metallization was successfully used to pattern on glass, and flexible polymer films, and both flat and curved substrates were used. The proposed technique was also capable of fabricating metal structures on flexible substrates with excellent conductivity. Metal filaments with resistivity four times bulk copper and thickness up to 15μm were demonstrated in the research.
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Azmi, S., M. Nohair, M. El Marrakchi, E. M. Khoumri, and M. Dabala. "Effect of the Complexing Agents on the Properties of Electrodeposited CZTS Thin Films." In 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA). IEEE, 2018. http://dx.doi.org/10.1109/icrera.2018.8566894.

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Nicu, Mihaela I., Laura A. Ionascu, Felicia N. Dragolici, Corneliu N. Turcanu, Gheorghe Gh Rotarescu, and Gheorghe C. Dogaru. "Conditioning of Pretreated LLW Generated by the Decontamination of VVR-S Nuclear Research Reactor Primary Circuit." In ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96063.

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Concentration of complexing acids solutions (oxalic acid, tartaric acid and citric acid) used in radioactive decontamination by chemical method affects both the mechanical stability and the chemical stability of cement matrix. The paper presents the works performed related to the chemical pretreatment of these organic acids solutions using as neutralizing agent Ca(OH)2. In this way it was possible to increase the concentration of organic acids solutions used and the soluble complex radionuclides passing in chemical precipitates, these affecting in a smaller manner the mechanical stability of the cement matrix. The chemical pretreatment the effluents improve the precipitation and conditioning performances by cementation. Were prepared compositions with complexing agents and compositions for oxidative degradation tests to simulate the concentrations of secondary radioactive waste obtained from the primary circuit decontamination of the VVR-S research reactor. It has been studied the influence of chemical pretreatment of complexing acids solutions of different concentrations on the setting time. Also it was determined the compressive strength of mortar samples in which were embedded these solutions of chemically pretreated organic acids. The results shown that an optimum cement–solution ratio doesn’t have a significant impact on the setting time or on the mechanical properties.
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Chen, Liangyan, Daoli Zhang, and Qian Chen. "The Effects of the Complexing Agents on the Growth and Properties of Modified Chemical-bath-deposited ZnS Thin Films." In 2006 1st IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2006. http://dx.doi.org/10.1109/nems.2006.334853.

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Braehler, Georg, Ronald Rieck, V. A. Avramenko, V. I. Sergienko, and E. A. Antonov. "Nuclide Separation by Hydrothermal Treatment and Ion Exchange: A Highly Effective Method for Treatment of Liquid Effluents." In ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2011. http://dx.doi.org/10.1115/icem2011-59217.

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Liquid low level radioactive effluents, when solidified in e. g. cement matrix, contribute to a significant extent to the waste amount to be disposed of in final repositories. Accordingly, since many years scientists and engineers investigate processes to remove the radioactive nuclides selectively from the effluents, to split the raw solution into two separate fractions: a large fraction with activity concentrations below the limits for free release; and a small fraction, containing the activity in concentrated form on e. g. ion exchanger materials (ion exchange has proven to be the most promising method for such “nuclide separation”). The challenge to be taken up is: When (and this is most often the case) the effluent contains organic materials and complexing agents, the formation of e. g. the 60-Co-EDTA complex prohibits its fixation to the ion exchangers. Accordingly the complexing agent needs to be removed or destroyed. The Institute for Chemistry of the Russian Academy of Sciences has applied the method of hydrothermal treatment (at elevated temperature and pressure, 200 °C, 200 bar), supported by Hydrogen Peroxide oxidation, to allow virtually complete removal of radioactive nuclides on inorganic ion exchangers. Pilot plants have been operated successfully in Russian power stations, and an operational plant has been designed. The method is being extended for an interesting and promising application: spent organic ion exchange resins, loaded up to the medium activity level, represent a serious disposal problem. With the hydrothermal process, in a process cycle, the activity can be stripped from the resins, the organic content is destroyed, and the activity is fixed on an inorganic absorber, well suited for final disposal.
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Lesca, Julien, and Taiki Todo. "Service Exchange Problem." In Twenty-Seventh International Joint Conference on Artificial Intelligence {IJCAI-18}. California: International Joint Conferences on Artificial Intelligence Organization, 2018. http://dx.doi.org/10.24963/ijcai.2018/49.

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In this paper, we study the service exchange problem where each agent is willing to provide her service in order to receive in exchange the service of someone else. We assume that agent's preference depends both on the service that she receives and the person who receives her service. This framework is an extension of the housing market problem to preferences including a degree of externalities. We investigate the complexity of computing an individually rational and Pareto efficient allocation of services to agents for ordinal preferences, and the complexity of computing an allocation which maximizes either the utility sum or the utility of the least served agent for cardinal preferences.
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Lu¨tzenkirchen, Johannes, Peter Vejmelka, Volker Metz, and Bernhard Kienzler. "Site Specific Sorption Data for the Asse Salt Mine." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4621.

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The focus of this contribution is to report sorption data for Asse salt mine. The purpose of the experimental program was to obtain data based on site and scenario specific considerations for use in terms of Kd-values for the emplacement rooms in performance assessment calculations. A range of materials, solutions and radionuclides was studied, including the variation of solid to liquid ratio and the effect of complexing agents with EDTA chosen as the representative. Observed sorption kinetics is compared to observations in model systems, where a fast and a subsequent slow sorption step occur. Calculations on a model system are performed assuming a similar sampling procedure as in the experimental program. It is concluded that the observed kinetics can at least partially be explained by the experimental procedure. Problems in obtaining and applying the site specific sorption coefficients in performance assessment are addressed. Special focus is in this respect on the need to develop (i) more mechanistic understanding of sorption processes in complex systems (ii) more complete sorption data sets and (iii) pragmatic sorption models capable of handling high salt concentrations.
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Reports on the topic "Complexing agents"

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Czerwinski, Kenneth R. Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents. Office of Scientific and Technical Information (OSTI), April 1992. http://dx.doi.org/10.2172/10158040.

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Czerwinski, Kenneth R. Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents. Office of Scientific and Technical Information (OSTI), April 1992. http://dx.doi.org/10.2172/7281430.

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Baisden, P., and B. Kadkhodayan. Novel complexing agents for the efficient separation of actinides and remediation of actinide-contaminated sites. Office of Scientific and Technical Information (OSTI), March 1996. http://dx.doi.org/10.2172/226428.

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Sanders, David M., and William B. Carlton. Information Overload at the Tactical Level (an Application of Agent Based Modeling and Complexity Theory in Combat Modeling). Fort Belvoir, VA: Defense Technical Information Center, August 2002. http://dx.doi.org/10.21236/ada405459.

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Fonseca, Liliana, Lisa Nieth, Maria Salomaa, and Paul Benneworth. Universities and Place Leadership: a question of agency and alignment. Universiteit Twente - Department of Science, Technology and Policy Studies (STePS), 2021. http://dx.doi.org/10.3990/4.2535-5686.2021.01.

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There is increasing interest in the question of how different stakeholders develop, implement and lead regional upgrading processes with the concept of place leadership emerging as one response to this. Simultaneously, universities face growing expectations that they will contribute to regional development processes – often through their collaborative relationships with other regional stakeholders. But universities are complex in terms of their internal and institutional structures, which undermines their capacities to enact coherent place leadership roles. We seek to understand how strategic leadership in universities can contribute to innovation and regional development in the context of the fundamental institutional complexity of universities. We address this through a qualitative, explorative case study comparing six European regions where universities have sincerely attempted to deliver place leadership roles. We identify that the elements of agency and alignment are vital in that: firstly, university leadership has to align with regional coalitions on the one hand and internal structures on the other hand, and secondly, this leadership must give individuals agency in their regional engagement activities.
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van Vark, Winnie, Ewoud Klopstra, and Joop Harmsen. Validation of ISO 16751 Soil Quality - Environmental availability of non-polar organic compounds : Determination of the potentially bioavailable fraction and the non-bioavailable fraction using a strong adsorbent or complexing agent. Wageningen: Wageningen Environmental Research, 2018. http://dx.doi.org/10.18174/465000.

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Tadros, Mariz. Violence and Discrimination against Women of Religious Minority Backgrounds in Pakistan. Institute of Development Studies (IDS), November 2020. http://dx.doi.org/10.19088/creid.2020.003.

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The theme of this special collection of papers, the lived experiences of women who belong to religious minorities, has been a blind spot both in international development policy engagement and in much of the international scholarship on women, security and peace. Women who belong to religious minorities, who are socioeconomically excluded and are vulnerable to multiple sources of gender-based violence in Pakistan seem to have fallen through the cracks of the ‘leave no one behind’ agenda. The aim of this volume is to shed light on the day-to-day experiences of women and their families who belong to the Ahmadiyya, Christian, Hindu and Hazara Shia religious minorities in Pakistan. Each of the papers in this collection exposes the complexity of the intersections of gender, class and religious marginality in shaping the realities for women from these religious minorities.
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Kasper, Eric. Urban Neighbourhood Dynamics and the Worst Forms of Child Labour. Institute of Development Studies (IDS), July 2021. http://dx.doi.org/10.19088/clarissa.2021.007.

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While the worst forms of child labour (WFCL) is not only an urban phenomenon, evidence suggests that WFCL emerges in cities in unique ways due to the complex structures and dynamics of urban systems. This report, therefore, develops a conceptual framework for WFCL in cities that integrates key understandings of urban systems and evidence about urban WFCL. This report reviews current literature on the complex systemic nature of cities – drawing on literature on the urban land nexus, urban complexity, informality, and inclusive urbanisation. It also reviews studies of child labour (focusing on the worst forms, where possible) in urban contexts. In this way, the report offers an innovative way of understanding the challenge of WFCL, and outlines the premises of a research agenda for responding to WFCL in cities. These contributions are made with the specific cities and neighbourhoods in mind where the CLARISSA programme is being implemented; however, they should be useful more generally.
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Akinleye, Taiwo, Idil Deniz Akin, Amanda Hohner, Indranil Chowdhury, Richards Watts, Xianming Shi, Brendan Dutmer, James Mueller, and Will Moody. Evaluation of Electrochemical Treatment for Removal of Arsenic and Manganese from Field Soil. Illinois Center for Transportation, June 2021. http://dx.doi.org/10.36501/0197-9191/21-019.

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Soils containing inorganic compounds are frequently encountered by transportation agencies during construction within the right-of-way, and they pose a threat to human health and the environment. As a result, construction activities may experience project delays and increased costs associated with management of inorganic compounds containing soils required to meet environmental regulations. Recalcitrance of metal-contaminated soils toward conventional treatment technologies is exacerbated in clay or organic content-rich fine-grained soils with low permeability and high sorption capacity because of increased treatment complexity, cost, and duration. The objective of this study was to develop an accelerated in situ electrochemical treatment approach to extract inorganic compounds from fine-grained soils, with the treatment time comparable to excavation and off-site disposal. Three reactor experiments were conducted on samples collected from two borehole locations from a field site in Illinois that contained arsenic (As)(~7.4 mg/kg) and manganese (Mn)(~700 mg/kg). A combination of hydrogen peroxide (H2O2) and/or citrate buffer solution was used to treat the soils. A low-intensity electrical field was applied to soil samples using a bench-scale reactor that resembles field-scale in situ electrochemical systems. For the treatment using 10% H2O2 and citrate buffer solution, average removal of 23% and 8% were achieved for Mn and As, respectively. With 4% H2O2 and citrate buffer, 39% and 24% removal were achieved for Mn and As; while using only citrate buffer as the electrolyte, 49% and 9% removal were achieved for Mn and As, respectively. All chemical regimes adopted in this study reduced the inorganic compound concentrations to below the maximum allowable concentration for Illinois as specified by the Illinois Environmental Protection Agency. The results from this work indicate that electrochemical systems that leverage low concentrations of hydrogen peroxide and citrate buffer can be effective for remediating soils containing manganese and arsenic.
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