Academic literature on the topic 'Kentucky Metal Products Co'
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Journal articles on the topic "Kentucky Metal Products Co"
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Vogler, Arnd, and Horst Kunkely. "Photochemische Spaltung einer polaren Metall—Metall-Bindung durch Metall zu Metall Charge-Transfer-Anregung von [Ph3PAu—Co(CO)4] / Photochemical Splitting of a Polar Metal —Metal Bond by Metal to Metal Charge Transfer Excitation of [Ph3PAu—Co(CO)4]." Zeitschrift für Naturforschung B 44, no. 2 (February 1, 1989): 132–34. http://dx.doi.org/10.1515/znb-1989-0206.
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Abstract The polar metal-metal bond of [Ph3PAu1-Co-1(CO)4] was cleaved photochemically by metal to metal (Co-1 ￫ Au+1) charge transfer excitation. Metallic gold, Ph3P, and [Co2(CO)8] were formed as products.
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Capus, Joseph. "PM Personality: Dr Chaman Lall, Metal Powder Products Co. (MPP)." Metal Powder Report 76, no. 3 (May 2021): 156–58. http://dx.doi.org/10.1016/j.mprp.2021.02.003.
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Smitley, D. R., T. W. Davis, K. A. Kearns, and C. M. Papp. "Chinch Bug Control, Ingham Co., Michigan, 1991." Insecticide and Acaricide Tests 17, no. 1 (January 1, 1992): 317. http://dx.doi.org/10.1093/iat/17.1.317a.
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Abstract A grid of 3 ft × 3ft plots separated by 2 ft wide buffer strips was set up in a home lawn with an infestation of chinch bugs in Okemos. Chinch bugs were counted in each plot on 10 Jul before insecticides were applied. Counts were made by observing each plot for a timed one min period. The treatments were blocked out based on these counts. Afterwards, six replications of each treatment were applied on 10 Jul between 10:00 am and 3:30 pm. The temperature when treatments were made was 85o-90°F with a 0 -5 mph wind. Granular products were evenly applied over the plot with hand-held shakers. Liquid products were applied with a single nozzle, hand-held C02 sprayer from R&D Sprayers. The application was made at 50 psi through an 8003 flat fan nozzle. Liquid insecticides were mixed with water and applied at a rate of 136.8 ml/9 ft2 (4 gal/ 1000 ft2). Chinch bugs were counted again in all plots on 17 Jul except for NTN 33893 plots which were counted on 2 Aug. Each plot was observed for 3 min to determine the number of chinch bugs present. The lawn was mostly Kentucky bluegrass with a Vi inch thatch layer and a sandy loam soil. The area was irrigated every other day before the test but no irrigation was applied after 10 Jul.
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Burg, J. G., and F. W. Knapp. "Evaluation of Permethrin Wipes for Fly Control on Horses, 1986." Insecticide and Acaricide Tests 12, no. 1 (January 1, 1987): 372. http://dx.doi.org/10.1093/iat/12.1.372.
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Abstract Five horse wipe products, Flysect™ Super-7, Flysect™ Super-7 concentrate, Tech-trol™ wipe-on, Tech-trol™ concentrate and Poridon™, were tested for fly control on pastured and stabled horses. Flysect™ Super-7, Tech-trol™ wipe-on and Poridon™ were used directly from the container. Flysect™ Super-7 concentrate was diluted 1:4 with water and Tech-trol™ concentrate was diluted 1:24 with water. The stable study was conducted in a 20 stall barn on the University of Kentucky Agriculture Research Farm containing 18 yearlings. Rice hull bedding was used and stalls were cleaned daily. Yearlings remained in their stalls except during cleaning. All treatment horses were brushed prior to wipe application. Each product was applied to 3 randomly selected yearlings at a rate of 120 ml/animal on 28 Jul '86. Three untreated yearlings served as controls. Fly counts were made immediately prior to treatment and at 1, 6, 24, 48 and 72 h post-treatment. The pasture study was conducted on 2 privately owned thoroughbred farms in Fayette and Scott Co. in central Kentucky. All horses remained in the pasture for the duration of the study. Five mares and 1 stallion on the Scott Co. farm were treated with the wipe-on products on 11, 18 and 25 Aug '86 (2 animals/wipe/date, 6 replications/ treatment). Six mares on the Fayette Co. farm were treated with concentrates on 18 and 25 Aug '86 (3 animals/concentrate/date, 6 replications/concentrate). No animal received the same treatment twice. Foals were present in some of the pastures with treated mares. Four mares on the Fayette Co. farm served as controls for the duration of the study. All treatment animals were brushed and wiped as previously described. Fly counts were made immediately prior to treatment and at 1, 6, 24, 48 and 72 h post-treatment.
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Campbell, Gary A. "The role of co-products in stabilizing the metal mining industry." Resources Policy 11, no. 4 (December 1985): 267–74. http://dx.doi.org/10.1016/0301-4207(85)90044-3.
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Graf, Marion, Kurt Merzweiler, Clemens Bruhn, and Hans-Christian Böttcher. "Reaktion von [Co(But2PH)2I2] mit [Ru3(CO)12]: Synthese und Röntgenkristallstrukturanalyse von [Ru3(CO)6(μ-H)(μ-I)2(μ-PBut2)(But2PH)]/ Reaction of [Co(But2PH)2I2] with [Ru3(CO)12]: Synthesis and X-Ray Crystal Structure of [Ru3(CO)6(μ-H)(μ-I)2(μ-PBut2)(But2PH)]." Zeitschrift für Naturforschung B 53, no. 8 (August 1, 1998): 865–70. http://dx.doi.org/10.1515/znb-1998-0815.
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Abstract [Co(But2PH)2I2] (1) reacts with [Ru3(CO)12] in refluxing toluene to give a mixture of products including the novel metal clusters [Ru3(CO)6(μ-H)(μ-I)2(μ-PBut2)(But2PH)] (2) and [Ru3(CO)7(μ-H)(μ-I)(μ-PBut2)2] (3) besides the known complex [Ru3(CO)8(μ-H)2(μ3- PBut)(But2PH)] (4). No cluster expansion products could be observed. Thus the cobalt compound acts merely as a phosphine and iodine transfer reagent. The molecular structures of the metal complexes 1 and 2 were determined by single-crystal X-ray structure analyses. 1 crystallizes in the tetragonal space group P4̄21c with a = 13.230(3), b = 13.230(3), c = 14.788(3)Å, V = 2588.4(9)A . 2 crystallizes in the monoclinic space group P21/c with a = 18.161(2), b = 10.292(2), c = 18.381(2)Å, β = 108.73(10)°, V= 3253.7(8)Å3.
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He, Tianwei, Cheng Tang, Alain R. Puente Santiago, Rafael Luque, Hui Pan, and Aijun Du. "Tuning CO binding strength via engineering the copper/borophene interface for highly efficient conversion of CO into ethanol." Journal of Materials Chemistry A 9, no. 22 (2021): 13192–99. http://dx.doi.org/10.1039/d1ta02355a.
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Planalp, Roy P., and Heinrich Vahrenkamp. "Öffnung von Dreikernclustern durch Diphosphinomethan-Liganden / Opening of Trinuclear Clusters by Diphosphinomethane Ligands." Zeitschrift für Naturforschung B 44, no. 2 (February 1, 1989): 139–44. http://dx.doi.org/10.1515/znb-1989-0208.
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Abstract The phosphinidene bridged clusters FeCo2(CO)9(PMe) and FeCoWCp(CO)8(PM e) add the diphosphinomethane ligands dmpm and dppm with concomitant opening of two metal-metal bonds. The crystal structure determination of the addition product (Me2P-CH2-PMe2)FeCoWCp(CO)8(PMe) has shown that the Fe -W and Fe -Co bonds have been opened and the chelating diphosphine spans the Co -W bond. This is in contrast to the reaction with monodentate phosphines where the Co -W and Co -Fe bonds are broken. Upon heating the addition products eliminate two moles of CO with formation of the diphos phinom ethane substituted starting clusters, which in turn add CO under pressure to re-form the addition products.
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Dowson, George R. M., Joshua Cooper, and Peter Styring. "Reactive capture using metal looping: the effect of oxygen." Faraday Discussions 230 (2021): 292–307. http://dx.doi.org/10.1039/d1fd00001b.
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By looping magnesium via electrolysis, capture and conversion of CO2 to higher-value products can happen simultaneously. The effect of other gases on this process, particularly oxygen, in waste CO2 streams is investigated and shown not to cause adverse effects.
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Sarma, Saurav Chandra, Jesus Barrio, Magda Titirici, and Ifan Erfyl Lester Stephens. "Tuning CO2 to CO Conversion on Metal-Doped Carbon Catalysts." ECS Meeting Abstracts MA2022-01, no. 36 (July 7, 2022): 1613. http://dx.doi.org/10.1149/ma2022-01361613mtgabs.
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One of the significant challenges faced during electrochemical CO2 reduction (ECO2RR) is the low selectivity of the products obtained. The best example is polycrystalline Cu, which can electrochemically produce hydrocarbons and alcohols but with poor selectivity.1, 2 To date, high selectivity has been achieved only towards CO and formate on Au and Sn surface, respectively but scalability and commercialization are limited owing to their cost and stability. Metal-nitrogen-carbon (MNC) materials are comparable to Au or Ag catalysts, albeit with their lower overpotentials, higher mass activity and high selectivity toward CO.3 , 4 During the pyrolysis of N-containing carbon molecules, different chemical functionalities such as pyridinic, pyrrolic and graphitic N atoms can be formed, each behaving as a product-specific active site. 5 It is still debatable whether pyrdinic or pyrrolic N is responsible for CO2RR activity; thus, it remains unclear how to favor CO2 reduction over hydrogen evolution. In this work, we aimed to synthesize C2N-like covalent organic frameworks, with 8-10 Å pore size, tailored to host dual atoms coordinated to nitrogen. Such sites are expected to favor C-C coupling and produce multi-carbon products during ECO2RR. A step-by-step synthetic approach was employed to optimize the CO2RR:HER ratio through: Tuning carbon:nitrogen ratio using two different synthetic approaches. Reducing nitrogen in the carbon matrix through pyrolyzing at different temperatures (700, 800 and 900 oC), Doping phosphorus and nitrogen into the carbon matrix Tuning CO2RR product distribution through different metals (Fe and Ni) doping. EXAFS and STEM studies revealed the presence of a mixture of single and dual atomic sites. XPS and ICP results showed that Fe and Ni loadings <2 wt% could be obtained in the C2N materials. Higher hydrogen evolution, owing to the higher N-content, was observed at a lower pyrolysis temperature which decreased at a pyrolysis temperature of 900 oC. Both Fe-NC and Ni-NC selectively produced CO, thus suppressing FE H2 to <5%. Fe-NC also exhibited lower overpotential for CO production compared to its Ni-NC counterpart. A small percentage of ethanol and 2-propanol (FE<5%) was observed indicating the favoured C-C coupling on the dual-atomic sites. Further optimization of the metal-N coordination environment may allow for an improved selectivity for >C2 products. References K. P. Kuhl, E. R. Cave, D. N. Abram and T. F. Jaramillo, Energy Environ. Sci., 5, 7050 (2012). S. Nitopi, E. Bertheussen, S. B. Scott, X. Liu, A. K. Engstfeld, S. Horch, B. Seger, I. E. L. Stephens, K. Chan, C. Hahn, J. K. Nørskov, T. F. Jaramillo and I. Chorkendorff, Chem. Rev., 119, 7610 (2019). A. S. Varela, N. Ranjbar Sahraie, J. Steinberg, W. Ju, H.-S. Oh and P. Strasser, Angew. Chem. Int. Edit., 54, 10758 (2015). A. S. Varela, W. Ju, A. Bagger, P. Franco, J. Rossmeisl and P. Strasser, ACS Catal., 9, 7270 (2019). Y. Lum and J. W. Ager, Nat. Catal., 2, 86 (2019).
Dissertations / Theses on the topic "Kentucky Metal Products Co"
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GUZMAN, MEDINA HILMAR DEL CARMEN. "Electrocatalytic reduction of CO2 to value-added products." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2907030.
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Rocha, Lisiane Kleinkauf da. "A simbiose industrial aplicada na interrelação de empresas e seus stakeholders na cadeia produtiva metal-mecânica na Bacia do Rio dos Sinos." Universidade do Vale do Rio dos Sinos, 2010. http://www.repositorio.jesuita.org.br/handle/UNISINOS/3212.
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Comitesinos - Comitê de Gerenciamento da Bacia Hidrográfica do Rio dos Sinos
FNMA - Fundo Nacional do Meio Ambiente
Pró-Sinos - Consórcio Público de Saneamento Básico da Bacia Hidrográfica do Rio dos Sinos
SEMA - Secretaria Estadual do Meio Ambiente (RS)
Ao longo dos anos, o desenvolvimento industrial trouxe impactos positivos e negativos à sociedade. O setor metal mecânico está inserido neste contexto, pois se caracteriza como setor de grande impacto ambiental adverso, além de consumir recursos naturais, gera uma série de resíduos sólidos, efluentes líquidos e emissões atmosféricas. Na Simbiose Industrial, os vários agentes (stakeholders) que participam, direta ou indiretamente, das atividades das empresas são os grandes propulsores das mudanças em prol da prevenção da poluição. Essa relação entre as partes pode acontecer de diversas formas, formando uma rede de melhorias ambientais conjuntas. É exatamente neste ponto que esta pesquisa pretende expandir-se e estudar a inter-relação das empresas com seus demais atores. Quem motiva quem? Quem ou quais são as molas propulsoras das mudanças ambientais? Que interrelações com esse propósito já acontecem nas empresas? De que forma ocorrem? Essas questões, abrangentes e complexas, são avaliadas e discutidas ao longo deste trabalho e aprofundadas em estudos de caso realizados em três empresas do setor. O estudo também contempla uma identificação das indústrias deste setor na área de abrangência citada, que aponta 331 empresas localizadas em 17 municípios dos trechos médio e inferior da Bacia dos Sinos, que é onde ocorrem os maiores impactos negativos oriundos de atividades industriais. Dentro do contexto apresentado, o presente trabalho tem como principal objetivo o de contribuir para a minimização dos impactos ambientais gerados pelo setor metal-mecânico na Bacia do Rio dos Sinos, tendo como horizonte a Ecologia Industrial. Aliando os resultados da identificação das indústrias e dos estudos de caso, o presente trabalho propõe um modelo de Simbiose Industrial, com o foco em coprodutos, aplicável ao setor, na área de abrangência da Bacia dos Sinos. O modelo é composto de sete etapas, que impulsionam as melhorias ambientais dos participantes, englobando desde a realização de uma gestão ambiental preventiva até a criação de uma rede de intercâmbios de co-produtos e recursos intangíveis, como conhecimento e informações. Para tal, diversos stakeholders são fundamentais, como entidades de apoio, universidades e instituições de fomento. Os estudos de caso demonstram que não existe uma única resposta à questão sobre os motivos das empresas para aprimorarem-se ambientalmente. A empresa X possui uma motivação exclusivamente cultural. A Empresa Y tem sua motivação mais arraigada na pessoa do diretor da empresa no que na empresa, embora exista um grande esforço do diretor para tal. Já na Empresa Z, a motivação é exclusivamente estratégica. De qualquer forma, os estudos demonstram que a cultura ou educação ambiental direcionam os motivos da mudança. Identificaram-se relações simbióticas entre empresas e stakeholders nos três casos estudados.
Over the years, industrial development has brought positive and negative impacts on society. The metal mechanic sector is em bedded in this respect because it is characterized as a sector of major adverse environmental impact, in addition to consuming natural resources; it generates a series of solid wastes, liquid effluents and atmospheric emissions. Industrial Symbiosis in the various actors (stakeholders) involved, directly or indirectly, the activities of firms are major drivers of change towards pollution prevention. This relationship between the parties can happen in various ways, such as forming a network of joint environmental improvements. It is exactly this point that it intends to expand and explore the inter-relation of the companies with their other players. Who drives whom? Who or what are the mains prings of environmental change? Those inter-relationships for this purpose is already happening in business? How do they occur? These issues, comprehensive and complex, are addressed, evaluated and discussed throughout this work and in-depth case studies in three companies in the industry. The study also includes an identification of the industries of this sector in the area range cited, which identifies 331 companies located in 17 cities from the medium and lower Basin of the Sinos River, which is where the greatest impacts occur from industrial activities. Within the context presented, this dissertation ma in objective is to contribute to the minimization of environmental impacts caused by the metal-mechanic sector in the Basin of Sinos River, having in mind the Industrial Ecology. Combining the results of identification of industries and case studies, this dissertation proposes a model of industrial symbiosis, focusing on by-products, applicable to the sector in the area of the Basin of the Sinos River. The model consists of seven steps that drive environmental improvements of the participants, comprising the implementation of a preventive environmental management for creating a network for exchange of by-products and intangible assets such as knowledge and information. To this end, several stakeholders are the key, such as support entities, universities and funding institutions. The case studies show that there is no single answer to the question about the motives of companies to improve themselves environmentally. Company X has a purely cultural motivation. Company Y has its motivation rooted more in the person of the company's director from the company, although there is a great director for this effort. In the Z Company, the motivation is purely strategic. Anyway, studies show that culture or environmental education directs the reasons for the change. It was identified symbiotic relationships between companies and stakeholders in the three cases studied.
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Yeh, yiliang, and 葉怡良. "The use of 6S-based counseling enterprise to promote lean production ¬－ A case study of Guangiang metal products (Suzhou) Co., Ltd." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/70623283458218289094.
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碩士修平科技大學
精實生產管理研究所
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High-quality and efficiently output are two ways of enterprise which will maintain success, it is also a key to satisfy our customer. An enterprise would like to give a management mode or efficiently activities of TOYOTA are searching to alter the current situation. The enterprise expects to strengthen their competition, but always get the futility of their attempts. The case is the Guangiang Metal Products (Suzhou) which unable to solve problems of products in life cycle decreased, there are issues of increase inventory, take long time for diverse product, lower production line and get lower price etc. Guangiang is looking for a new management method for cost down, we are researching into the way of success by executing 6S activities and lean production aim at efficiently managerial procedure. It could reduce the inventory size, make product efficiency, which will enable the enterprise to produce high-quality and low-price manufactures. The purposes of this study are achieving customer’s satisfaction and increased the benefits of company. First, the project consulted all domestic and abroad documents within 6s and TOYOTA production system (TPS). Second, we provide a mode of lean production scheme which base on 6s activities and a result from experience of improved for an industry. Third, we offer completely professional guidance and training for an enterprise, an outcome of the activities tie-in with the TOYOTA-style management was discussed. Finally, a successful model of management for an enterprise was provided.
Books on the topic "Kentucky Metal Products Co"
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Mason, Jean K. Intimate tyranny: Untangling father's legacy. Cambridge, Mass: Centora Press, 2008.
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IAEA. Uranium Resources As Co- and by-Products of Polymetallic, Base, Rare Earth and Precious Metal Ore Deposits. International Atomic Energy Agency, 2018.
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Knopf, Thomas, Alexandra David, Dieter Rehfeld, Frank Hillebrandt, Constance von Rüden, Michael Roos, Silviane Scharl, et al. The RITaK Conferences. 2013-2014: Raw Materials, Innovation, Technology of Ancient Cultures - RITaK 1. Edited by Petra Eisenach, Thomas Stöllner, and Arne Windler. Deutsches Bergbau-Museum Bochum, 2017. http://dx.doi.org/10.46586/dbm.139.
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Globally, raw materials play a central role and are a key factor in determining the economic power and growth of modern states, confederations and coalitions. The extraction and supply of raw materials is a main driving force in global trade today, but has also profoundly influenced human economic and cultural history. In order to elucidate the importance of mineral ores in pre-modern societies, PhD students and staff at the Leibniz graduate school “Raw Materials, Innovation and Technology of Ancient Cultures” [RITaK] – a co-operation between the German Mining Museum [Deutsches Bergbau-Museum, DBM] and the Ruhr-University Bochum [RUB] – were involved in interdisciplinary research. This publication contains the results of the international RITaK end-of-project conference, held from the 27th-29th of September, as well as contributions to the RITaK workshop “Perspectives for an Economic Archaeology”, held on the 22nd and 23rd of November 2013. At a theoretical and model-building level, the first seven articles provide archaeological, sociological and economic perspectives on the diverse economic, cognitive, cultural and social feedback processes set in motion by the appropriation and use of raw materials. The following contributions focus on different archaeological and historical cultures in Europe, Central Asia and the Mediterranean area from the Neolithic to the Middle Ages. Raw material processing and preparation, metal recycling, prehistoric and historic mining, the exchange mechanisms involving raw materials and their products, as well as technology and knowledge transfer, are all covered. Together, the 23 contributions to this volume offer the possibility for intensive engagement with the theme of resources and their influence on and entanglement with human behaviour, mentalities, knowledge acquisition, technological and social developments and even the relationship between people and their environments and the human appropriation of space.
Book chapters on the topic "Kentucky Metal Products Co"
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Stephenson, G. R., M. Perseghini, and A. Togni. "Metal Removal To Give Organic Products." In Compounds with Transition Metal-Carbon pi-Bonds and Compounds of Groups 10-8 (Ni, Pd, Pt, Co, Rh, Ir, Fe, Ru, Os), 1. Georg Thieme Verlag KG, 2001. http://dx.doi.org/10.1055/sos-sd-001-00812.
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Stephenson, G. R., M. Perseghini, and A. Togni. "Oxidation of η-Products." In Compounds with Transition Metal-Carbon pi-Bonds and Compounds of Groups 10-8 (Ni, Pd, Pt, Co, Rh, Ir, Fe, Ru, Os), 1. Georg Thieme Verlag KG, 2001. http://dx.doi.org/10.1055/sos-sd-001-00844.
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Stephenson, G. R., M. Perseghini, and A. Togni. "Disproportionation of η-Products." In Compounds with Transition Metal-Carbon pi-Bonds and Compounds of Groups 10-8 (Ni, Pd, Pt, Co, Rh, Ir, Fe, Ru, Os), 1. Georg Thieme Verlag KG, 2001. http://dx.doi.org/10.1055/sos-sd-001-00852.
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Schwantes, Daniel, Affonso Celso Gonçalves, Marcelo Angelo Campagnolo, César Ricardo Teixeira Tarley, Douglas Cardoso Dragunski, Jéssica Manfrin, and Andréia Da Paz Schiller. "Use of Co-Products from the Processing of Cassava for the Development of Adsorbent Materials Aiming Metal Removal." In Cassava. InTech, 2018. http://dx.doi.org/10.5772/intechopen.71048.
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Parameswari, Ettiyagounder, Tamilselvan Ilakiya, Veeraswamy Davamani, Periasami Kalaiselvi, and Selvaraj Paul Sebastian. "Metallothioneins: Diverse Protein Family to Bind Metallic Ions." In Heavy Metals - Their Environmental Impacts and Mitigation. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97658.
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Metallothionein’s (MTs) are the lower molecular weight (6-7 kDa) proteins that are found to be present in almost all organism types ranging from prokaryotes to eukaryotes species. MT are the metal detecting proteins that can mitigate the effect caused by the excess metal ions. They are also found to be involved in cellular process such as cell growth regulation, ROS (Reactive Oxygen Species) and DNA repair. The protein was termed as Metallothionein due to the unusual higher metal (metallo) and the sulfur (thiol) content. They are further grouped into 3 classes viz., class I, II and III. The Class I and II MTs are polypeptides that were obtained from direct gene products, the class III MTs are from the cysteine-rich non-translational molecules that are termed as phytochelatins. The metal ions are been sequestered through the MTs with Cys rich motifs. All the cysteines are present in the reduced form and are been co-ordinated through the mercaptide bonds. The cysteines present in the MTs are preserved across the species, it is supposed that, cysteines are essential for the function and the MTs are required for the life. Metallothionins structure, conservation in evolution, their ubiquitous nature of occurrence, the genes redundancy and the programmed MTs synthesis in development, regeneration and reproduction of living organisms are some of the weighty arguments in suspecting MTs to also serve others and perhaps the high particular metal-related cellular roles. In this chapter, there is a detailed discussion about Metallothionein its structure, occurrence and function.
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Roy, Plabani, and Moumita Ash. "INFLUENCE OF SILICON ON PLANT UPTAKE OF HEAVY METALS AND METALLOID FROM SOIL." In Futuristic Trends in Agriculture Engineering & Food Sciences Volume 2 Book 9, 107–29. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2023. http://dx.doi.org/10.58532/v2bs9ch10.
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The second-most common element in the crust of the earth is silicon, performs a variety of beneficial roles in soils and plants. It helps to reduce a variety of biotic (diseases and pest insects) and abiotic pressures (salt, drought and heavy metals).Si influences the heavy metal and metalloid uptake by plants through different mechanisms including (1) Si bioavailability in soil is influenced by biological factors, (2) by altering the soil's properties, (3) heavy metal co-precipitation, (4) heavy metals being changed into less solubility forms, (5) root architecturemodification, (6) controlling antioxidant enzymes, (7) gene expression that controls how wellheavy metals are absorbed by and transported to plants is regulated both up and down. In this chapter it is discussed about the various mechanisms involved in heavy metal and metalloid uptake by Silicon. The application of industrial by products (fly ash, steel slag etc.) decreased the conversion of soluble metals into insoluble metal silicates, phosphates, and hydroxides reduces the intake of heavy metals. Si application can reduce heavy metal bioavailability in soil. Silicon nanoparticles along with Pb-resistant microbes significantly reduced the Pb concentration in plants. Si application changes mineral composition of Fe plaque in rice root which decreases both shoot As and grain As. A significant decrease in Cd and Pb toxicity of wheat along with increased grain yield can be possible by the application of organic and inorganic silicon fertilisers. By preventing the production of low affinity cation transporter, silicon nanoparticles can decrease the uptake of Cd into rice grains and phloem (OsLCT1). Through decreased electrolytic leakage, lower levels of malondialdehyde and hydrogen peroxide, and increased antioxidant enzyme activity, si treatment reduces Cd toxicity in cotton. To assess the viability of using Si for the remediation of metalcontaminated soils, extensive field tests are needed
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Dutta, Binita. "A REVIEW ON RECENT PROGRESSES IN FUNGI-BASED FABRICATION OF NANOPARTICLES." In Futuristic Trends in Chemical Material Sciences & Nano Technology Volume 3 Book 25, 33–46. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3becs25p1ch3.
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In recent years green fabrication methods of nanoparticles have attracted ample attention. Unlike the conventional methods involving toxic reactants and by-products, these processes are environment-friendly and economic. Nanoparticles produced in these methods have also shown to have more specific surface area and better catalytic reactivity [1]. These biocompatible nanomaterials are suitable for applications in various fields like biomedicines, antimicrobials and biosensors. Earlier reports indicate that nanoparticles of metals like Ag, Au, Se, Pt, Pd, metal oxides of Ti, Zn, Co, Fe, Cu, Sb, Zr and sulphides of Zn and Cd can be synthesized easily through intracellular/ extracellular chemical reactions in uni- or multicellular microorganisms, like yeast and other fungi, algae, actinomycetes as well as in vitro plant mediated synthesis using various parts like stem, root, fruit, seed, callus, peel, leaves and flowers. Yeast-mediated synthesis of Au, Ag, CdS and PbS nanoparticles [2], Fusarium oxysporum mediated synthesis of stable gold, platinum and bimetallic Au–Ag alloy [3], etc., are some of the interesting examples. The present study includes recent progress in fungi-based biogenic fabrication of nanoparticles.
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Taber, Douglass. "Transition Metal-Mediated Construction of Carbocycles: Dimethyl Gloiosiphone A (Takahashi), Pasteurestin A (Mulzer), and Pentalenene (Fox)." In Organic Synthesis. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199764549.003.0074.
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There continue to be new developments in transition metal- and lanthanide-mediated construction of carbocycles. Although a great deal has been published on the asymmetric cyclopropanation of styrene, relatively little had been reported for other classes of alkenes. Tae-Jeong Kim of Kyungpook National University has devised (Tetrahedron Lett. 2007, 48, 8014) a Ru catalyst for the cyclopropanation of simple α-olefins such as 1. X. Peter Zhang of the University of South Florida has developed (J. Am.Chem. Soc. 2007, 129, 12074) a Co catalyst for the cyclopropanation of alkenes such as 5 having electron-withdrawing groups. Alexandre Alexakis of the Université de Genève has reported(Angew. Chem. Int. Ed. 2007, 46, 7462) simple monophosphine ligands that enabled enantioselective conjugate addition to prochiral enones, even difficult substrates such as 8. Seunghoon Shin of Hanyang University has found (Organic Lett. 2007, 9, 3539) an Au catalyst that effected the diastereoselective cyclization of 10 to the cyclohexene 11, and Radomir N. Saicic of the University of Belgrade has carried out (Organic Lett. 2007, 9, 5063), via transient enamine formation, the diastereoselective cyclization of 12 to the cyclohexane 13. Alois Fürstner of the Max-Planck- Institut, Mülheim has devised (J. Am. Chem. Soc. 2007, 129, 14836) a Rh catalyst that cyclized the aldehyde 14 to the cycloheptenone 15. Some of the most exciting investigations reported in recent months have been directed toward the direct diastereo- and enantioselective preparation of polycarbocyclic products. Rai-Shung Liu of National Tsing-Hua University has extended (J. Org. Chem. 2007, 72, 567) the intramolecular Pauson-Khand cyclization to the epoxy enyne 16, leading to the 5-5 product 17. Michel R. Gagné of the University of North Carolina has devised (J. Am. Chem. Soc. 2007, 129, 11880) a Pt catalyst that smoothly cyclized the polyene 18 to the 6-6 product 19. Yoshihiro Sato of Hokkaido University and Miwako Mori of the Health Science University of Hokkaido have described (J. Am. Chem. Soc. 2007, 129, 7730) a Ru catalyst for the cyclization of 20 to the 5-6-5 product 21. Each of these processes proceeded with high diastereocontrol.
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Bethke, Craig M. "Hydrothermal Fluids." In Geochemical Reaction Modeling. Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195094756.003.0020.
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Hydrothermal fluids, hot groundwaters that circulate within the Earth’s crust, play central roles in many geological processes, including the genesis of a broad variety of ore deposits, the chemical alteration of rocks and sediments, and the origin of hot springs and geothermal fields. Many studies have been devoted to modeling how hydrothermal fluids react chemically as they encounter wall rocks, cool, boil, and mix with other fluids. Such modeling proliferated in part because hydrothermal fluids are highly reactive and because the reaction products are commonly well preserved, readily studied, and likely to be of economic interest. Further impetus was provided by the development of reliable modeling software in the 1970s, a period of concern over the availability of strategic and critical minerals and of heightened interest in economic geology and the exploitation of geothermal energy. As a result, many of the earliest and most imaginative applications of geochemical modeling, beginning with Helgeson’s (1970) simulation of ore deposition in hydrothermal veins and the alteration of nearby country rock, have addressed the reaction of hydrothermal fluids. For example, Reed (1977) considered the origin of a precious metal district; Garven and Freeze (1984), Sverjensky (1984, 1987), and Anderson and Garven (1987) studied the role of sedimentary brines in forming Mississippi Valley-type and other ore deposits; Wolery (1978), Janecky and Seyfried (1984), Bowers et al. (1985), and Janecky and Shanks (1988) simulated hydrothermal interactions along the midocean ridges; and Drummond and Ohmoto (1985) and Spycher and Reed (1988) modeled how fluid boiling is related to ore deposition. In this chapter, we develop geochemical models of two hydrothermal processes: the formation of fluorite veins in the Albigeois ore district and the origin of “black smokers, ” a name given to hydrothermal vents found along the ocean floor at midocean ridges. As a first case study, we borrow from the modeling work of Rowan (1991), who considered the origin of fluorite (CaF2) veins in the Albigeois district of the southwest Massif Central, France. Production and reserves for the district as a whole total about 7 million metric tons, making it comparable to the more famous deposits of southern Illinois and western Kentucky, USA.
Conference papers on the topic "Kentucky Metal Products Co"
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Kwong, C. W., C. Y. H. Chao, and K. S. Hui. "Recycling Biomass Co-Combustion Fly-Ash Products for an Integrated Solar-Assisted Ventilation System." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90128.
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The potential use of biomass co-combustion derived fly-ash products and zeolite 13X for the elimination of volatile organic compounds (VOCs) using ozone was investigated for an integrated solar-assisted air purification and desiccant cooling system. Fly-ash products from rice husk-coal co-combustion at different biomass blending ratios were used as the adsorbent/catalyst materials. The material characteristics of the adsorbent/catalyst materials such as metal content and surface area were compared and correlated with the catalytic activities. It was found that the surface area and the metal constitutes have made the catalytic activities over the fly-ash products from biomass co-combustion superior to that from coal-only combustion. The elevated reaction temperatures from 25°C to 75°C also have significant effects on the removal of VOCs. The apparent activation energies of the reaction path over the fly-ash products with the addition of ozone to the air were reduced, when compared with the use of air as an oxidant. On the other hand, the potential synergy to Zeolite 13X was explored. The combined catalytic ozonation and adsorption enhanced the VOCs removal and at the same time reduced the intermediates emission. Furthermore, the hydrophilic properties of zeolite 13X could be utilized to handle the latent load of the solar-assisted ventilation system for energy conservations.
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Angel, S. A., P. A. Hansen, E. J. Heilweil, and J. C. Stephenson. "Application of Ultrafast Broadband Infrared Spectroscopy to Measurement of Metal-carbonyl Dynamics." In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/up.1990.mc13.
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There is growing interest in identifying transient structures, mode-specific energy content and reaction products generated in condensed-phase molecular systems on the picosecond or shorter timescale. This information is important for understanding the details of chemical reaction mechanisms and kinetics at ambient or elevated temperatures, especially for polyatomic molecules in solution. Recent developments in the field of ultrafast time-resolved infrared (IR) spectroscopy show promise of being able to observe these dynamical processes. In this poster, transient IR spectral measurements for CO-stretching vibrations of metal-carbonyl molecules and cluster compounds in solution which identify vibrational relaxation rates, intra-mode and intermolecular energy transfer and photo-dissociation products will be presented.
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Tyan, Y. S., T. K. Hatwar, G. Farruggia, R. H. Victora, M. W. Culver, and C. F. Brucker. "Co/Pt Disks with a Simplified Structure." In Symposium on Optical Memory. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/isom.1996.owd.7.
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MO technology is now widely used for erasable optical storage. Almost all MO media products to date are based on rare-earth/transition metal alloys (RE-TM), such as TbFeCo. Although these alloys provide excellent recording performance, their intrinsic corrosion sensitivity necessitates the use of protective layers, typically thin nitride films, on both sides of the recording layer, to protect them from the environment. Frequently, to further enhance the recording performance, an additional reflector layer is used to form an optically tuned quadri-layer structure. The nitride type protective layers are slow and difficult to fabricate. The multilayer, optically tuned structure necessitates tight manufacturing tolerance. The compatibility between layers in terms of adhesion and stress often is difficult to control. These factors, and the fact that the RE-TM alloys are sensitive to oxidation and need to be coated in an excellent vacuum environment, all contribute to the cost of the media.
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Kosivtsov, Yury, Yury Lugovoy, Kirill Chalov, Alexander Sidorov, and Mikhail Sulman. "INFLUENCE OF ZEOLITE CATALYSTS IMPREGNATED WITH TRANSITION METALS ON THE PROCESS OF DEOXYGENATION OF VOLATILE PRODUCTS OF FAST PYROLYSIS OF FLAX SHIVES." In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/4.1/s17.15.
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A study was made of the influence of ZSM-5 zeolite on the composition and properties of the products of fast pyrolysis of flax shives in the temperature range of 350-750 �C. Zeolite ZSM-5 increased the heat of combustion of gaseous products, as well as the content of methane, ethylene, hydrogen, and carbon dioxide, which is probably associated with the processes of cracking of volatile products passing through a layer of a catalyst heated to high temperatures. The synthesis and study of zeolite catalysts ZSM-5 containing transition metals (Fe, Co, Ti, V, Mn, Zn, Cu, Cr) with a 2% metal concentration in the process of deoxygenation of volatile products of fast pyrolysis of waste biomass of plant origin. According to the activity in the deoxygenation process, the metals studied during the work stage can be arranged in the following descending order: Pd > Pt > Co > Cu > Ni > Fe > Cr > Mn > V > Ti > Zn.The 2%Co-ZSM-5 catalyst showed high activity in the deoxygenation process, since its use led to an increase in the low volumetric calorific value of the fast pyrolysis gas by 1.3-1.5 times, as well as to a decrease in the tars content.
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Khan, M. S. A., and T. W. Clyne. "Microstructure and Abrasion Resistance of Plasma Sprayed Cermet Coatings." In ITSC 1996, edited by C. C. Berndt. ASM International, 1996. http://dx.doi.org/10.31399/asm.cp.itsc1996p0113.
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Abstract Cermet (WC-Co) coatings have been produced on steel substrates by plasma spraying in vacuum and in air. These have been examined microstructurally and characterised in terms of porosity content, stiffness, microhardness and abrasion resistance. Particular attention has been paid to the phase constitution, as revealed by X-ray diffraction and scanning electron microscopy. High precision densitometry has been used to study porosity levels. Coatings with three different metal contents (9, 12 and 17wt.%Co) have been examined. There is a strong tendency for chemical reactions to occur within the plasma plume, particularly for spraying in air. These reactions can result in the formation of various carbides and even of metallic tungsten. Thermodynamic and kinetic aspects of the reactions involved are briefly examined. Such reactions are strongly promoted by the presence of oxygen, and are much less marked during vacuum plasma spraying. Plasma power and substrate temperature have secondary effects on the degree of reaction which occurs. A marked correlation was observed between degree of reaction and resistance to abrasive wear. This is consistent with the reaction products being brittle and causing poor interfacial cohesion. It was also found that wear resistance was greater for the coatings with lower metal contents. This behaviour can be attributed to the wear occurring predominantly by ploughing of the metallic phase and consequent release of ceramic particles. This occurred more readily when the metal content was higher. In coatings which had undergone pronounced chemical reaction, however, metal had been replaced by reaction products which conferred poor cohesive strength, leading to poor wear resistance.
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Chen, Cheng, Changyu Zhou, Guiming Hu, and Na Lei. "Mathematical Model for Metal Dusting on Low Alloy Steels." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77223.
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Metal dusting is a kind of catastrophic corrosion phenomenon that can be observed in a wide range of petrochemical industry, it occurs in high-temperature equipments and tubes that exposed to hydrocarbon atmosphere and involves the disintegration of metals or alloys into graphitic carbon, fine metal or carbide particles. It is generally considered that the process of metal dusting can be divided into three stages: carburization, precipitation of carbides and decomposition of carbides, the precipitated carbides may include one or several kinds of formation such as Fe3C, Fe5C2 and Fe2C. The experiment was carried out on the dusting of low alloy steel Cr5Mo in CO-H2 gas mixture at 600 °C, the experimental results proved that the process of metal dusting for this kind of low alloy steels could be seen as uniform corrosion. By X-ray diffraction analysis, the formations of corrosion samples from exterior surface to interior matrix were: brittle layer of Fe5C2, intermediate layer of Fe3C plus Fe, inner metallic matrix. To describe the process of metal dusting in Cr5Mo, the mathematical model for the three stages of metal dusting was offered respectively: 1st stage, based on correlative theories on metal carburization, the distribution of carbon concentration in initial stage could be simulated by finite difference method; 2nd stage, based on 3-D diffusion theories of metal solid solution, Fick’s diffusion equation and jump mass balance equation was applied at interface. Reaction of metal dusting was simplified to be the proceeding of carbon diffusing into metallic matrix through Fe5C2 and Fe3C+Fe layers, then the growing rate equation of corrosion layer was represented. 3rd stage, based on the reaction rate equation, the carbides products were considered to be decomposed thoroughly to calculate the rate of disintegration reaction. Using the model with 3 stages mentioned above, the depth of corrosion samples for simplified 1-D plate of Cr5Mo steel was calculated. Compared with the actual measured corrosion depth of Cr5Mo samples subject to carburizing atmosphere after different exposure time, the calculated result showed a good agreement for the experimental result, so this model could be applied for the description of metal dusting in low alloy steels, and the method for calculating corrosion rate might offer some theoretical supports for further research such as life prediction of chemical process equipment subject to attack of metal dusting.
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Taylan, Onur, and Halil Berberoglu. "Dissociation of Carbon Dioxide Using a Microdischarge Plasma Reactor." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64632.
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This paper reports an experimental study on dissociation of carbon dioxide using a microdischarge plasma reactor at ambient conditions. Carbon dioxide contributes to more than 80% of the greenhouse gas emissions in United States. The microdischarge plasmas can be a very promising method in dissociating gases, including carbon dioxide, due to their lack of need for catalysts, operating at temperatures lower than conventional thermochemical dissociation processes and ease of operation. A microhollow cathode discharge plasma reactor was designed and prototyped for CO2 dissociation. The reactor included metal electrodes that were attached to both sides of a dielectric material with a micro-size through hole. The electrodes and the dielectric material were placed perpendicular to flow direction for dissociation to occur as carbon dioxide passed through the hole. A set of experiments were conducted to investigate the effect of flow rate and applied voltage on the composition of the products, energy conversion efficiency and CO2-to-CO conversion yield of the microdischarge plasma reactor. Temperature of reactants and products were continuously measured; applied voltage was set using a high-voltage power supply; and molar composition of products for each case was analyzed using gas chromatography. Results showed that CO2 dissociation rate, energy conversion efficiency and CO2-to-CO conversion yield increased with applied voltage. Moreover, CO2 dissociation rate and conversion yield decreased while energy conversion efficiency increased with increasing flow rate.
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Haigh, J. "The Mechanisms of III-V Movpe and Routes to a UV-assisted process." In Microphysics of Surfaces, Beams, and Adsorbates. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/msba.1985.tuc2.
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The epitaxial growth of III-V compounds by co-pyrolysis of Group III metal alkyls and Group V hydrides constitutes one application of the well-known technique of MOVPE (metallo-organic vapour phase epitaxy). Recently interest has been aroused in the possibility of photolytic enhancement of the process. Encouraging results have been reported [1,2] with GaAs. Photolysis and pyrolysis, at least in the case of the simpler metallo-organics, lead to rather similar products, and this implies that the initial stages are chemically similar and potentially compatible. The motivation for developing a photolytic/pyrolytic process derives primarily from the high spatial resolution of photon fluxes compared with conductive or radiative heat sources.
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Kitamori, R. "Fabrication of Large Three-Dimensional Flow Path Structure Using SS Flexible Tube." In Hot Isostatic Pressing. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902837-15.
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Abstract. Aluminum is a commonly used material when cooling channels are required due to its high thermal conductivity and light weight. However, aluminum has a low corrosion resistance which is a key factor to be aware of when a cooling system utilizing water is required. Metal Technology Co. Ltd. (MTC) currently manufactures a variety of aluminum products in which stainless steel (SS) tubes are embedded and bonded with HIP to improve corrosion resistance while maintaining a light weight. As the demand for complex three-dimensional (3D) cooling channels increases, the complexity creates limitations on creating the cooling channels using the current methods and processes. 3D flow paths can be fabricated if SS tubes are bent and then welded together, but the assembly process for HIP is complex. Complex, thin-walled SS flexible tubes are not able to withstand the pressures applied during diffusion bonding. MTC, has successfully developed an alternative for making internal 3D cooling channels with SS flexible tubes.
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Laws, Steven, David Wells, and Andrew Herrick. "UK Contributions to the Decommissioning of the BN-350 Reactor in Kazakhstan: 2002–2011." In ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2011. http://dx.doi.org/10.1115/icem2011-59099.
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Since 2002, the UK’s Global Threat Reduction Programme managed by the Department of Energy and Climate Change (DECC) has provided assistance to the Republic of Kazakhstan with the decommissioning of the BN-350 sodium cooled fast reactor. Assistance has focused on non-proliferation, safety and security projects to ensure the permanent and irreversible shutdown of the reactor and the reduction of security, safety and environmental hazards, particularly those associated with the large inventory of liquid metal coolants (sodium and sodium-potassium alloy) and the presence of spent nuclear fuel (SNF). UK assistance efforts have been co-ordinated with those of the USA and have made use of the UK’s experience in decommissioning its own fast reactor plants at Dounreay. The paper describes work undertaken with UK technical and funding assistance support in the following areas: • Provision of training and technical support in project management and technical topics, including assistance with completion of the BN-350 Decommissioning Plan. • Liquid metal coolant treatment projects, including immobilization of liquid products from the Sodium Processing Facility (SPF) and processing of residual sodium remaining within the drained coolant circuits. • Immobilization of highly active caesium traps, arising from sodium clean-up both during reactor operations and post-shutdown. • Operations to transfer the entire inventory of spent nuclear fuel from the reactor storage pond into dual-use storage and transport casks and then consign these casks to long-term secure storage remote from the reactor site. This activity was part of the major US-Kazakhstan SNF Storage Project. • Surveys of spent fuel route facilities to establish the absence of any significant amount of nuclear material. Key achievements in 2010 were the successful completion of residual sodium processing and completion of the SNF Storage Project. Through 2011, it is intended that the surveys of the fuel storage pond and immobilization of caesium traps will be completed, bringing the current UK assistance activities to an end before March 2012.