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Relevant bibliographies by topics / Metal Complexing Agents

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Academic literature on the topic 'Metal Complexing Agents'

Author: Grafiati

Published: 5 June 2025

Last updated: 12 July 2025

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Journal articles on the topic "Metal Complexing Agents"

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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 (2012): 3–6. http://dx.doi.org/10.17073/0368-0797-2012-8-3-6.

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Mathew, Beena, and V. N. Rajasekharan Pillai. "Crosslinked polystyrene-supported dithiocarbamates as metal complexing agents." European Polymer Journal 30, no. 1 (1994): 61–65. http://dx.doi.org/10.1016/0014-3057(94)90234-8.

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Bush, Ashley I. "Metal complexing agents as therapies for Alzheimer’s disease." Neurobiology of Aging 23, no. 6 (2002): 1031–38. http://dx.doi.org/10.1016/s0197-4580(02)00120-3.

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Price, Katherine, Peter Crouch, and Anthony White. "Therapeutic Treatment of Alzheimers Disease Using Metal Complexing Agents." Recent Patents on CNS Drug Discovery 2, no. 3 (2007): 180–87. http://dx.doi.org/10.2174/157488907782411774.

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Mathew, Beena, and V. N. Rajasekharan Pillai. "Divinylbenzene-crosslinked polyacrylamide-supported dithiocarbamates as metal complexing agents." Polymer Bulletin 26, no. 6 (1991): 603–10. http://dx.doi.org/10.1007/bf00313212.

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Alexandratos, Spiro D., and Marc A. Strand. "Synthesis of interpenetrating polymer networks as metal ion complexing agents." Macromolecules 19, no. 2 (1986): 273–80. http://dx.doi.org/10.1021/ma00156a005.

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Garba, Mustapha D., Muhammad Usman, Mohammad A. Jafar Mazumder, Amir Al-Ahmed, and Inamuddin. "Complexing agents for metal removal using ultrafiltration membranes: a review." Environmental Chemistry Letters 17, no. 3 (2019): 1195–208. http://dx.doi.org/10.1007/s10311-019-00861-5.

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Sengupta, Sucheta, Rinki Aggarwal, and Yuval Golan. "The effect of complexing agents in chemical solution deposition of metal chalcogenide thin films." Materials Chemistry Frontiers 5, no. 5 (2021): 2035–50. http://dx.doi.org/10.1039/d0qm00931h.

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This review article gives an overview of different complexing agents used during chemical deposition of metal chalcogenide thin films and their role in controlling the resultant morphology by effective complexation of the metal ion.

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Chmielewska, Kuryszko, Wietrzyk, Kiełbowicz, and Kafarski. "Synthesis and Biological Evaluation of Aminobisphosphonates—Analogues of Incadronate." Proceedings 22, no. 1 (2019): 64. http://dx.doi.org/10.3390/proceedings2019022064.

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Tong, Fei, Jie Gong, Man Ying Zhang, Yu Jie Wang, and Jin Long Jiang. "Self-Assembly Synthesis of ZIF-8/Polyvinylidene Fluoride(PVDF) Hybrid Membrane and its Pd (II)-Ion Extraction Behavior." Materials Science Forum 1003 (July 2020): 115–21. http://dx.doi.org/10.4028/www.scientific.net/msf.1003.115.

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Precious metal Pd are widely used in high-tech industries due to their scarcity and special properties. In this paper, 2-methylimidazole zinc salt (ZIF-8)/PVDF hybrid membrane was successfully synthesized by self-assemble method. The effect of polyarcylic acid sodium (PAAS) and polyethyleneimine (PEI) as complexing agents was investigated. The rejection rate of hybrid membrane under different polyelectrolyte-metal complexing ratios and their extraction performance under different concentration were examined.

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Dissertations / Theses on the topic "Metal 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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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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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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Suwanrut, Jintana. "A study of the use of complexing agents to assess the availability of metals in estuarine sediments." Thesis, University of East Anglia, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297490.

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Булгаков, Євгеній Сергійович. "Оцінка ефективності фізико-хімічних методів очищення води від іонів важких металів". Master's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/30738.

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Магістерська дисертація: 128 с., 40 рис., 31 табл., 9 формул, 75 джерел літератури, 5 додатків. Мета роботи: оцінка параметрів процесів вилучення іонів важких металів з водних розчинів. Об’єкт дослідження: процеси очищення природної та стічної води від іонів важких металів. Предмет дослідження: вилучення йонів Cu2+, Pb2+, Zn2+, Cd2+, Ni2+ з водних розчинів різних концентрацій методами адсорбції, нанофільтрації та іонного обміну. Вивчено процеси видалення йонів важких металів з розведених розчинів при використанні сорбентів на основі магнетиту, мембрани ОПМН–П та різних типів катіонообмінних фільтрів. Показано, що ефективність процесу залежить від наявності іонів жорсткості у воді та рН при іонообмінному очищенні, часу сорбції, вихідної концентрації іонів металу у розчині та рН при адсорбції, а також від вибору комплексонів при нанофільтрації. Досліджено залежність селективності нанофільтраційної мембрани по важким металам та іонах жорсткості від типу комплексоутворювача, що використовувався.<br>Master's Thesis: 128 pp., 40 figs., 31 tables, 9 formulas, 75 literature sources, 5 applications. Purpose: to estimate the parameters of the processes of extraction of heavy metal ions from aqueous solutions. Object of study: processes of purification of natural and waste water from heavy metal ions. Subject of study: extraction of Cu2+, Pb2+, Zn2+, Cd2+, Ni2+ ions from aqueous solutions of different concentrations by adsorption, nanofiltration and ion exchange methods. The processes of removal of heavy metal ions from dilute solutions using magnetite sorbents, OPMN-P membrane and various types of cation exchange filters have been studied. It is shown that the efficiency of the process depends on the presence of hardness ions in water and pH at ion exchange purification, sorption time, initial concentration of metal ions in solution and pH at adsorption, as well as the choice of complexes in nanofiltration. The dependence of the selectivity of the nanofiltration membrane on heavy metals and rigidity ions on the type of complexing agent used was investigated.<br>Магистерская диссертация: 128 с., 40 рис., 31 табл., 9 формул, 75 источников литературы, 5 приложений. Цель работы: оценка параметров процессов извлечения ионов тяжелых металлов из водных растворов. Объект исследования: процессы очистки природной и сточной воды от ионов тяжелых металлов. Предмет исследования: изъятие ионов Cu2+, Pb2+, Zn2+, Cd2+, Ni2+ из водных растворов различных концентраций методами адсорбции, нанофильтрации и ионного обмена. Изучены процессы удаления ионов тяжелых металлов из разбавленных растворов при использовании сорбентов на основе магнетита, мембраны ОПМН-П и различных типов катионообменных фильтров. Показано, что эффективность процесса зависит от наличия ионов жесткости в воде и рН при ионообменной очистке, времени сорбции, исходной концентрации ионов металла в растворе и рН при адсорбции, а также от выбора комплексонов при нанофильтрации. Исследована зависимость селективности нанофильтрационной мембраны по тяжелым металлам и ионам жесткости от типа комплексообразователя, который использовался.

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Yan, Gwo-Shyong, and 顏國雄. "Recovery and separation of metal ions through ion-exchange membranes using water-soluble complexing agents." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/68093913885394439100.

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碩士<br>元智大學<br>化學工程研究所<br>88<br>The effectiveness of metal separation under different complexing agents and current density using cation-exchange membrane has been sutdied. Metal ions were transferred through the membrane from feed solution to the receiving solution which contains complexing agents in different metal concentrations and variable voltage. The separation was achived by the selectivity of complexing agents to different metal ions. And, the effects of metal concentration and current density on the mass transfer rate were discussed by Nernst-Planck equation. In the systems without applied voltage, the mass transfer rate increased with the concentrations of metals and complexing agents. This is also in the case of binary systems. EDTA was better than PEI in increasing the mass trasnsfer rate since the stability constants of metals and EDTA were larger than PEI. The mass transfer rate increased with the current density with applied voltage. In constant current density, increasing concentrations of the complexing agents and metals, led to an increase in the mass transfer rate.

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Wang, Tsung-Yuan, and 王宗源. "Treatment of Water Containing Complexing Agents and Metal Ions by Membrane Filtration and Ion Exchange." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/78249904082473599836.

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碩士<br>元智大學<br>化學工程學系<br>90<br>Abstract Ion exchange and chemical precipitation processes are well-established methods for removal of heavy metal ions from aqueous solutions and widely used in industry and nuclear wastewater treatment. While in the presence of complexing agents the treatment performance is severely affected due to the complex formation of the complexing agents and metal ions. This study aims at investigating the effects of complexing agents on the removal efficiency of metal ions from aqueous solutions by ion exchange method and exploring feasible strategies for solving the treatment problems caused by complexing agents contained in the aqueous wastewaters. Experiments were performed using sodium salt of ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), and citric acid as the model complexing agents and using Mn2+, Co2+, Ni2+, Sr2+ as the model metal ions to be removed from the aqueous solutions. Methods of membrane separation and ion exchange were employed to investigate the separation efficiencies of metal ions by changing various parameters including pH, kinds and molar concentrations of the complexing agents. Results show that in single component systems almost all of the metal ions in solutions conjugate with complexing agents at pH above 9 and can be separated from the solutions by nanofiltration. Separation efficiencies for all metal ions conjugated with EDTA and NTA are greater than 99 percent. While for Sr2+ ions conjugated with citric acid only 92 percent efficiency is obtained. The tendency for mental ions to form complexes with complexing agents follows the sequence: EDTA > NTA > citric acid. It also reveals that removal efficiencies of metal ions by ion exchange decrease as the pH rises due to enhanced conjugation between metal ions and complexing agents. While at pH below 2, removal efficiencies are grater than 95 percent because most of the metal ions doesn’t form complexes with the complexing agents and can be removed by ion exchange.

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Wang, Jau-Kai, and 王昭凱. "Studies on Separation of Metal Ions with Ion-exchange Membrane in the presence of Complexing Agents." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/88226115984486231043.

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Books on the topic "Metal Complexing Agents"

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Sapogova, Elena. Developmental psychology and age psychology. INFRA-M Academic Publishing LLC., 2022. http://dx.doi.org/10.12737/997107.

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The textbook contains systematized information about psychological, socio-cultural, historical-ethnographic, psychobiological and other aspects of the development of a person changing over time. The first section is devoted to general theoretical problems of developmental psychology, the second to the analysis of different ages. The comprehensive nature of the manual makes it possible to solve the problems of formation in the professional consciousness of a stable complex of scientific categories and concepts, with the help of which the factual diversity of manifestations of the mental life of a developing person is described in psychology; familiarization with classical and modern interpretations of human development, with different variants of psychological interpretation of its essence, nature, mechanisms, driving forces and contradictions; disclosure of dialectics and phenomenology of the formation of a person as a cultural and historical subject; formation of ideas about the complexity and ambiguity of the evolution of a child as a human being; understanding the basic laws of the formation of personality and individuality of a person at each stage of its development. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for the study of the discipline "Developmental psychology, age psychology" during the professional training of psychologists in universities and is aimed at students of bachelor's and master's degrees in psychology faculties of classical and pedagogical universities, humanities and medical universities, as well as graduate students, psychology teachers and practical psychologists who are improving their qualifications in the field of age psychology.

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Drummond, Laurel A. Structural basis for the design of selective complexing agents for transition metals. 1989.

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Domhoff, G. William. The Emergence of Dreaming in Children and Adolescents. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190673420.003.0005.

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The fourth chapter provides the most complete and detailed account of the development of dreaming between ages 4 and 18 that has ever been assembled. It also includes new findings with teenagers that have not been published before. It concludes by drawing on the psychology literatures on the development of conceptual abilities, mental imagery, narrative skills, imagination, and an autobiographical self to explain why dreaming is a gradual cognitive achievement that is not fully adultlike in frequency and complexity until ages 9–11 and in content until ages 11–13.

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Tsoukas, Haridimos. Philosophical Organization Theory. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198794547.001.0001.

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When it comes to the field of organization and management theory, a philosophical perspective enables us to conduct organizational research imbued with the attitude of “wonder”; it helps researchers question dominant images of thought underlying mainstream thinking, and provides fresh distinctions that enable the development of new theory. In bringing together a collection of key essays by Haridimos Tsoukas, this volume explores fundamental concepts, such as organizational routines, that have gained currency in the field, as well as revisiting traditional concepts such as change, strategy, and organization. It discusses organizational knowledge, judgment, and reflection-in-action, and, at the meta-theoretical level, suggests complex forms of theorizing that seek to reflect the complexity of organizations. The conceptual attention throughout is on process and practice, underlain by performative phenomenology and an emphasis on agents’ lived experience. This provides us with the language to appreciate the dynamic character of organizational behaviour, the embeddedness of action, and the complexity of organizational life. The theoretical claims presented in this volume have important implications for scholarly practice, insofar as they help retrain our attention: from seeing structures and individuals, we can now appreciate processes, experiences, and practices. A phenomenological attitude makes organization theory more open, more creative, and more reflexive, and this book will be essential reading for researchers and students in the field of organization studies.

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Del Socorro Castañeda-Liles, María. Our Lady of Everyday Life. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190280390.001.0001.

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Based on ethnographic research in northern California, Our Lady of Everyday provides an in-depth cross-sectional analysis of three groups of Mexican origin women between the ages of 18 and 82 (single and in college; mothers; and older women). The study traces their life trajectories from childhood to adulthood. Castañeda-Liles found that their mothers’ Catholic devotion became the first religious/cultural template from within which they learned to see themselves as people of faith in a specific sociocultural context. She also found that the Catholic culture in which the mothers socialized the participants provided the parameters within which they learn how to be good girls in ways that reduces a girl’s agency to rubble. Castañeda-Liles argues that instead of blindly accepting androcentric Catholic teachings or rejecting Catholicism altogether, the women developed a type of Mexican Catholic imagination that allowed them to transgress limiting notions of what a good Catholic woman should be, while retaining the aspects of Catholicism they found life-giving—all the while continuing to identify as Catholics. This is most visible in their relationship to La Virgen de Guadalupe, which is not fixed but fluid and deeply engaged in their process of self-awareness in everyday life. Their stories demonstrate that the ways race, class, gender, sexuality, and religion intersect have serious implications for our understanding of women’s subjectivity and their mental and physical health. Therefore, Castañeda-Liles argues that treating these categories of analysis as mutually exclusive undermines the researcher’s ability to grasp the fluidity and complexity of women’s lived experience.

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Book chapters on the topic "Metal Complexing Agents"

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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. Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1687-9_6.

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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. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4899-1956-4_4.

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Verhagen, Harko, Corinna Elsenbroich, and Nanda Wijermans. "Agent Decision-Making Heterogeneity—Agent (Meta)Frameworks for Agent-Based Modelling." In Springer Proceedings in Complexity. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-57785-7_48.

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Muti’ah, Jackson Siahaan, and I. Nyoman Loka. "The Use of Complexing Agent 1-5Diphenylthiocarbazone in the Analysis of Heavy Metals Cu, Pb, Zn, Mn and Ni in Seawater Samples: Application of Solvent Extraction Learning in Analysis Separation Subject." In Atlantis Highlights in Chemistry and Pharmaceutical Sciences. Atlantis Press International BV, 2023. http://dx.doi.org/10.2991/978-94-6463-130-2_7.

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Bourou, Dimitra, Marco Schorlemmer, and Enric Plaza. "Euler vs Hasse Diagrams for Reasoning About Sets: A Cognitive Approach." In Diagrammatic Representation and Inference. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-15146-0_13.

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AbstractThe literature on diagrammatic reasoning includes theoretical and experimental work on the effectiveness of diagrams for conveying information. One influential theoretical contribution to this field proposes that a notation that is more effective than another would have an observational advantage over it; that is, it would make certain pieces of information observable—by means of some visual, meaning-carrying relationships—that were not observable in the other. Although the notion of observational advantage captures a relevant aspect of the benefit of using one notation over another, we present here an example where this notion is not sufficient to distinguish between a more and a less effective diagram. We suggest to take the theory of observational advantage one step further by linking it to cognitive theories of human conceptualisation and reasoning. Following our previous work, we propose that the act of observing facts about set theory from the geometry of a diagram can be modeled as a conceptual blend of image schemas with parts of the geometric configuration of a diagram. Image schemas are elementary mental structures that crystallize early embodied experiences, allowing agents to make sense of what they perceive by conceptualising it in terms of these structures (e.g., container, link, scale etc.). With our approach, we can extend the theory of observational advantage to take into account the cognitive complexity of the act of observation. Concretely, we present an example of an Euler and a Hasse diagram, and we posit that, while their observational advantage is equivalent, the Hasse diagram requires a much more complex network of conceptual blends to model certain observations made from it. Thus, to reason about certain set-theoretic claims, a Hasse diagram is less cognitively effective than an Euler diagram with equivalent observational advantage. We believe our approach contributes to the theoretical discussion on what factors affect the effectiveness of a diagram, and provides new avenues for the exploration of how the embodied experiences of the users contribute to the way they reason with diagrams.

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Price, Katherine A., Peter J. Crouch, and Anthony R. White. "Therapeutic Treatment of Alzheimer's Disease Using Metal Complexing Agents." In Frontiers in CNS Drug Discovery. BENTHAM SCIENCE PUBLISHERS, 2012. http://dx.doi.org/10.2174/978160805159511001010106.

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Kumar, Rajiv, Anuj Raj, Sujit Baran Kumar, and Paul Ratnasamy. "Convenient synthesis of crystalline microporous transition metal silicates using complexing agents." In Studies in Surface Science and Catalysis. Elsevier, 1994. http://dx.doi.org/10.1016/s0167-2991(08)64103-8.

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Coelho, Helder. "Overview of Agent Modelling." In Agent-Based Tutoring Systems by Cognitive and Affective Modeling. IGI Global, 2008. http://dx.doi.org/10.4018/978-1-59904-768-3.ch001.

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The field of agents is presented, taking in mind what means to be a rational entity, how it operates, can be specified, and formally described. After giving a glimpse of the current state of the field, we use the BDI model, supported by folk psychology, to discuss new challenges concerning the mentality and the behaviour of an agent. This is done with the help of our own research around new mental states and properties of the agency. Defining the character and personality of an entity can be rather interesting to attack real applications where complexity is a stong ingredient.

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Sergeevna Ageeva, Liliya, Nikolai Alekseevich Borsch, and Nikolay Vladimirovich Kuvardin. "2(4)-Aminopyridines as Ligands in the Coordination and Extraction Chemistry of Platinum Metals." In Exploring Chemistry with Pyridine Derivatives. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.106376.

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The specific behavior of aromatic amines in the coordination and extraction processes of isolation and separation of platinum and other metals is discussed using the example of 2(4)-aminopyridines (2(4)-AP). As intrasphere ligands, 2(4)-AP have a high electron-donor capacity due to the pumping of an easily polarizable π-electron density. The chemistry of the extraction of platinum metals, iridium in particular, is considered: depending on the conditions, ion associates, coordination-solvated compounds or compounds containing an amine in the inner and outer coordination sphere of the metal are extracted. In the extraction of simple singly charged anions, there is a violation of the exchange-extraction series established for a large set of aliphatic amines. Soft anions (according to Pearson), for example, SCN- and I-, are best extracted, while for aliphatic amines such an anion is hard СlO4−. In the coordination compounds of platinum metals, 2(4)-AP acts as an electron donor, is coordinated by heterocyclic nitrogen with a redistribution of electron density not only to the accepting metal-complexing agent, but also further along the N-Me-X chain (X is an acido ligand in the composition of the complex), which leads to even greater covalence of the molecule as a whole.

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"Creative Approaches to Mental Health: A Critical Analysis of the Mindfulness Agenda in Sussex." In Chronicity : Care and Complexity. BRILL, 2013. http://dx.doi.org/10.1163/9781848881907_016.

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Conference papers on the topic "Metal Complexing Agents"

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Haskaj, Adelina, Musaj Pacarizi, Sonja Lepitkova, Berat Sinan, Bahri Sinani, and Elida Dreshaj. "THE POTENTIAL COMPLEXING IMPACT OF SOME ORGANIC COMPOUNDS AMINE AND CARBOXYL GROUPS ON TRANSITION METALS." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/4.1/s18.42.

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Environmental water chemistry is substantially aided by modern electrochemical research. Sensitive voltammetric techniques are much more useful for metal species in natural waters, where complexation with organic molecules predominates. Many environmental electrochemists are still interested in determining the stability constants of metal ion complexes with various ionic species found in natural waterways. The aim of this work is to investigate the possible influence of complexation of amine and carboxyl groups of some organic molecules (with EDTA, NTA and aniline, using differential pulse polarography). The Differential Pulsed Polarography (DPP) is experimental technique that consist on three-electrode electrochemical cell of: working electrode (SMDE "Static Mercury Drop Electrode"), reference electrode (Ag/AgCl electrode) and auxiliary electrode (graphite electrode). In our research we have followed the polarographic waves of metal ions (Men+), in constant concentration (C=1x10-4 mol/dm3) titrating in perchlorate solution with complexing agents: aniline, NTA and EDTA, in concentrations from C 1x10-5 to 1x0-3 mol.dm-3, at two pH values (pH = 4 and pH = 6). To prove the competition of organic ligands in the complexion of metal ions (Men+) we have prepared solutions by completely complexing the metal ions with aniline and then we have gradually added the strongest complexing agents NTA and EDTA.

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Roarty, D. H., K. Lawson, J. C. Ryder, D. A. Eden, and G. P. Quirk. "Decontamination Operations on a PWR Fuel Channel Assembly. an On-line Corrosion Evaluation of Component Materials." In CORROSION 1993. NACE International, 1993. https://doi.org/10.5006/c1993-93191.

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Abstract A series of decontamination procedures were carried out on a de-fuelled PWR fuel channel assembly during October 1991. The procedures involved the use of propriety solutions (LOMI, CAN-DEREM) based upon mixed organic acids and complexing agents. The radioactive species incorporated in the metal oxide surfaces of the fuel channel assembly components are dissolved for subsequent removal on ion exchange resin beds. Alkaline permanganate treatments were also used to condition the metal oxide for subsequent dissolution by the LOMI and CAN-DEREM procedures. Decontamination procedures must be effective in solubilising the radioactive contamination without causing excessive or localised corrosion of the component itself. To date, this has usually been addressed by coupon analysis following completion of the decontamination process. In this operation multi-electrode monitoring probes were installed in a Westinghouse mobile flow loop (ASME code IX design, skid mounted) used to conduct the decontamination. The materials investigated were AISI 316L, Inconel 600, Inconel X750 and Stellite 156. Computer controlled instrumentation was used to monitor electrochemical impedance and electrochemical potential and current noise measurements. Data were taken continuously throughout the decontamination operation. The instrumentation provided on-line corrosion rates and an indication of the mode of attack (general or localised). The data show that the amount of general metal dissolution for all four materials during the decontamination process was low, however, instantaneous corrosion rates during particular stages could be relatively high although the instantaneous corrosion rates varied with each test material; the electrochemical responses being very strongly dependent upon the bulk solution chemistry. It was observed that Stellite 156 (a typical hard-facing material) was observed to be particularly sensitive to pitting corrosion during the alkaline permanganate step. The combination of electrochemical techniques used during the decontamination process were found to be particularly useful for highlighting aspects of the process that could be optimised. This approach is being developed to provide detailed on-line information for a complete PWR reactor coolant circuit decontamination operation

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Koutsoukos, Peter G., Panagiota D. Natsi, and Zahid Amjad. "Review of the State of the Art of Siliceous Scale Management in Industrial Systems." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17731.

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Abstract Fouling of equipment surfaces by siliceous materials in industrial water systems is a problem associated with high silica laden waters. The complexity of siliceous deposits formation stems from the limited solubility of amorphous silica and metal silicates. Once formed, these deposits are difficult to remove and often requires the use of chemical and/or mechanical approaches. This paper presents mechanisms of siliceous deposits formation and reviews various approaches attempted to control these deposits in industrial systems. Comparative performance data on a variety of polymeric, non-polymeric, and formulated products as siliceous deposit control agents are presented. Additionally, information on morphology of various siliceous deposits formed is discussed.

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Michels, Harold T., Bryan Boulanger, and Nikolaos P. Nikolaidis. "Copper Roof Stormwater Runoff - Corrosion and the Environment." In CORROSION 2002. NACE International, 2002. https://doi.org/10.5006/c2002-02225.

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Abstract A well defined watershed was utilized to determines copper concentration, speciation and aquatic toxicity in stormwater runoff. Stormwater runoff samples were collected during 16 storm events from a copper roof, and simultaneously at several other locations within the watershed, in order to better understand the sources and fate of copper. Copper concentration, pH, and hardness were measured. Acute toxicological evaluations indicated, that although runoff was toxic at the bottom of the downspout, it exhibited no acute toxicity by the time it flowed into a stream, a state regulated waterway. Dilution, interaction with the piping materials, dissolved organic carbon and other complexing agents and debris have reduced the concentration of the potentially harmful ionic copper. Because corrosion products may be released in stormwater, corrosion engineers should play role in establishing relevant and meaningful metals discharge criteria, which protec the environment, but do not unnecessarily restrict the use of metals.

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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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Povar, I., O. Spynu, and A. Vishnevsky. "THERMODYNAMIC ANALYSIS OF SYNERGISTIC INTERACTIONS IN THE OPTIMIZATION OF PHOSPHORUS RECOVERY FROM WASTEWATER THROUGH STRUVITE CRYSTALLIZATION." In Scientific and practical conference with international participation "Geo- and bioecological problems of the middle and lower Dniester river basin". A.O. Asociația Internațională a Păstrătorilor Râului Eco-TIRAS, 2024. https://doi.org/10.70739/gbp2024.39.

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The paper emphasizes the importance of synergistic interactions in the phosphorus recovery process, making struvite a preferred choice due to its nature as a complex mineral containing two cations. The developed thermodynamic approach to studying chemical and synergistic equilibria in homogeneous and heterogeneous multi-component systems is applied to determine the optimal concentrations of wastewater components for maximum struvite precipitation. Various possible chemical interactions in aqueous solutions are considered, including hydrolysis of metal ions, protonation of ligands, and complex formation, with a focus on the influence of pH on thermodynamic functions. The amount of struvite formed is estimated based on thermodynamic parameters, initial concentrations, and the pH of the solution. The study covers the thermodynamic aspects of struvite precipitation at pH values ranging from 7 to 11, taking into account the presence of complexing agents that facilitate the binding of heavy metals into stable complexes. The proposed approach can be extended to more complex systems involving additional complexation reactions.

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Ding, Y., and T. J. Nye. "Collaborative Agent Based Optimization of Draw Die Design." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67839.

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In this paper we consider the problem of automatically determining optimal drawbead sizes and blankholder forces when designing draw dies for stamped parts. A network of software agents, each implementing a different numerical optimization technique, was used in combination with metal forming simulation software to optimize process variables. Three test cases were used of varying complexity from a rectangular cup to the NUMISHEET’99 automobile front door panel simulation benchmark. It was found that the performance of each agent (and optimization technique) depended strongly on the complexity of the problem. More interestingly, for a given amount of computational effort, a network of collaborating agents using different optimization techniques always outperformed agents using a single technique in terms of both the best solution found and in the variance of the collection of best solutions.

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Izmerova, N. I., and I. Ya Chistova. "ACTUAL ISSUES OF COMPLEX-FORMING INACTIVATORS USE IN SKIN PROTECTION PRODUCTS FOR OCCUPATIONAL ALLERGIC DERMATOSES PREVENTION." In The 17th «OCCUPATION and HEALTH» Russian National Congress with International Participation (OHRNC-2023). FSBSI «IRIOH», 2023. http://dx.doi.org/10.31089/978-5-6042929-1-4-2023-1-205-209.

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An important place in the system of individual prevention belongs to the method based on the inactivation of irritating chemicals and allergens. Of the complexing agents in the composition of skin protection products, Trilon A and Trilon B have received the greatest use for the prevention of allergic dermatosis. The mechanism of action of complexing agents in the composition of synthetic detergents is to bind and neutralize ions of alkaline earth and heavy metals. An important practical value for the inactivation and removal of nickel is the disodium salt of ethylenediaminetetraacetic acid — Trilon B. Detergents are the most commonly used and affordable skin protection products for workers. Their use leads to the stabilization of the regenerative and protective properties of the skin, and therefore they are of great importance in the prevention of the development of occupational dermatoses. The correct choice of dermatological PPE, taking into account the complex of production factors present at certain workplaces, will prevent the development of pathological skin changes in workers exposed to harmful production factors. This will also reduce the risk of developing occupational skin diseases in workers.

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Simon, Loïck, Philippe Rauffet, Clément Guérin, and Cédric Seguin. "Trust in an Autonomous Agent for Predictive Maintenance: How Agent Transparency Could Impact Compliance." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1001602.

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In the context of Industry 4.0, human operators will increasingly cooperate with intelligent systems, considered as teammates in the joint activity. This human-autonomy teaming is particularly prevalent in the activity of predictive maintenance, where the system advises the operator to advance or postpone some operations on the machines according to the projection of their future state. Like in human-human cooperation, the effectiveness of cooperation with those autonomous agents especially depends on the notion of trust. The challenge is to calibrate an appropriate level of trust and avoid misuse, disuse or abuse of the recommending system. Compliance (i.e. positive response of the operator on advice from an autonomous agent) can be interpreted as an objective measure of trust as the operator relies on the advice from the autonomous agent. This compliance is also based on the risk perception of the situation as the operator assesses the risk and the benefits of advancing or postponing an operation. A way to calibrate the trust and enhance risk perception is to use the transparency concept. Transparency has been defined as an information during a human-machine interaction that is easy to use with the intent to promote the comprehension, the shared awareness, the intent, the role, the interaction, the performance, the future plans and the reasoning process. This research will focus on two aspects of the transparency concept : the reliability of the autonomous agent ; the outcomes linked to the advice of the autonomous agent. The objective of this research is to understand the effect of the autonomous agent transparency on human trust after an advice from an autonomous agent (here an AI for predictive maintenance) for a more or less risky situation. Our hypothesis is that transparency will impact compliance (H1: Risk transparency will decrease compliance ; H2: Reliability transparency will increase compliance ; H3: Full transparency will decrease compliance)For this experiment we recruited participants to complete decision situations (i.e. accept or deny a proposition, from a predictive maintenance algorithme, of advancing or postponing a CMMS maintenance). A software for predictive maintenance in maritime context was used to address those situations. During this experiment, agent transparency level is manipulated by displaying information related to agent reliability and to situation outcomes, separately or in combination. This agent transparency is mixed with situation complexity (high or low) and the type of advice (advancinc or postponing the maintenance interventions). Age, gender, profession and affinity for the use of technology are assessed for control variables. As the situation represents risk taking, a scale for propensity of risk taking is also used. Trust (subjective and objective), risk perception and mental workload are measured after each situation. As a final question, the participant gives the main information he used to make his choice for each experimental setting.

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"Recovery of Base Metals from Mine Tailings Dumps collected in the Vicinity of Potchefstroom: Leaching assisted by Complexing Agent." In 7th International Conference on Latest Trends in Engineering and Technology. International Institute of Engineers, 2015. http://dx.doi.org/10.15242/iie.e1115026.

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Reports on the topic "Metal Complexing Agents"

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Akinleye, Taiwo, Idil Deniz Akin, Amanda Hohner, et al. Evaluation of Electrochemical Treatment for Removal of Arsenic and Manganese from Field Soil. Illinois Center for Transportation, 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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