Готові списки джерел за темами / CuFeS2

Добірка наукової літератури з теми "CuFeS2"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "CuFeS2"

1

Auernik, Kathryne S., and Robert M. Kelly. "Impact of Molecular Hydrogen on Chalcopyrite Bioleaching by the Extremely Thermoacidophilic Archaeon Metallosphaera sedula." Applied and Environmental Microbiology 76, no. 8 (February 26, 2010): 2668–72. http://dx.doi.org/10.1128/aem.02016-09.

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ABSTRACT Hydrogen served as a competitive inorganic energy source, impacting the CuFeS 2 bioleaching efficiency of the extremely thermoacidophilic archaeon Metallosphaera sedula. Open reading frames encoding key terminal oxidase and electron transport chain components were triggered by CuFeS2. Evidence of heterotrophic metabolism was noted after extended periods of bioleaching, presumably related to cell lysis.
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2

Chang, Shun-An, Po-Yu Wen, Tsunghsueh Wu, and Yang-Wei Lin. "Microwave-Assisted Synthesis of Chalcopyrite/Silver Phosphate Composites with Enhanced Degradation of Rhodamine B under Photo-Fenton Process." Nanomaterials 10, no. 11 (November 20, 2020): 2300. http://dx.doi.org/10.3390/nano10112300.

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A new composite by coupling chalcopyrite (CuFeS2) with silver phosphate (Ag3PO4) (CuFeS2/Ag3PO4) was proposed by using a cyclic microwave heating method. The prepared composites were characterized by scanning and transmission electron microscopy and X-ray diffraction, Fourier-transform infrared, UV–Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. Under optimum conditions and 2.5 W irradiation (wavelength length > 420 nm, power density = 0.38 Wcm−2), 96% of rhodamine B (RhB) was degraded by CuFeS2/Ag3PO4 within a 1 min photo-Fenton reaction, better than the performance of Ag3PO4 (25% degradation within 10 min), CuFeS2 (87.7% degradation within 1 min), and mechanically mixed CuFeS2/Ag3PO4 catalyst. RhB degradation mainly depended on the amount of hydroxyl radicals generated from the Fenton reaction. The degradation mechanism of CuFeS2/Ag3PO4 from the photo-Fenton reaction was deduced using a free radical trapping experiment, the chemical reaction of coumarin, and photocurrent and luminescence response. The incorporation of CuFeS2 in Ag3PO4 enhanced the charge separation of Ag3PO4 and reduced Ag3PO4 photocorrosion as the photogenerated electrons on Ag3PO4 were transferred to regenerate Cu2+/Fe3+ ions produced from the Fenton reaction to Cu+/Fe2+ ions, thus simultaneously maintaining the CuFeS2 intact. This demonstrates the synergistic effect on material stability. However, hydroxyl radicals were produced by both the photogenerated holes of Ag3PO4 and the Fenton reaction of CuFeS2 as another synergistic effect in catalysis. Notably, the degradation performance and the reusability of CuFeS2/Ag3PO4 were promoted. The practical applications of this new material were demonstrated from the effective performance of CuFeS2/Ag3PO4 composites in degrading various dyestuffs (90–98.9% degradation within 10 min) and dyes in environmental water samples (tap water, river water, pond water, seawater, treated wastewater) through enhanced the Fenton reaction under sunlight irradiation.
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3

Wen, Po-Yu, Ting-Yu Lai, Tsunghsueh Wu, and Yang-Wei Lin. "Hydrothermal and Co-Precipitated Synthesis of Chalcopyrite for Fenton-like Degradation toward Rhodamine B." Catalysts 12, no. 2 (January 26, 2022): 152. http://dx.doi.org/10.3390/catal12020152.

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Анотація:
In this study, Chalcopyrite (CuFeS2) was prepared by a hydrothermal and co-precipitation method, being represented as H-CuFeS2 and C-CuFeS2, respectively. The prepared CuFeS2 samples were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive X-ray spectroscopy mapping (EDS-mapping), powder X-ray diffractometer (XRD), X-ray photoelectron spectrometry (XPS), and Raman microscope. Rhodamine B (RhB, 20 ppm) was used as the target pollutant to evaluate the degradation performance by the prepared CuFeS2 samples. The H-CuFeS2 samples (20 mg) in the presence of Na2S2O8 (4 mM) exhibited excellent degradation efficiency (98.8% within 10 min). Through free radical trapping experiment, the major active species were •SO4− radicals and •OH radicals involved the RhB degradation. Furthermore, •SO4− radicals produced from the prepared samples were evaluated by iodometric titration. In addition, one possible degradation mechanism was proposed. Finally, the prepared H-CuFeS2 samples were used to degrade different dyestuff (rhodamine 6G, methylene blue, and methyl orange) and organic pollutant (bisphenol A) in the different environmental water samples (pond water and seawater) with 10.1% mineral efficiency improvement comparing to traditional Fenton reaction.
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4

Yu, Huajian, Jianhua Xu, Yanyan Hu, Huadi Zhang, Cong Zhang, Chengcheng Qiu, Xuping Wang, Bing Liu, Lei Wei, and Jing Li. "Synthesis and characterization of CuFeS2 and Se doped CuFeS2−xSex nanoparticles." Journal of Materials Science: Materials in Electronics 30, no. 13 (May 27, 2019): 12269–74. http://dx.doi.org/10.1007/s10854-019-01586-5.

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5

Hu, Junqing, Qingyi Lu, Kaibin Tang, Yitai Qian, Guien Zhou, and Xianming Liu. "A solvothermal reaction route for the synthesis of CuFeS2 ultrafine powder." Journal of Materials Research 14, no. 10 (October 1999): 3870–72. http://dx.doi.org/10.1557/jmr.1999.0523.

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Анотація:
A 100-nm CuFeS2 ultrafine powder was prepared through a solvothermal reaction at 200–250 °C. X-ray powder diffraction and transmission electron microscopy results revealed that chalcopyrite-phase CuFeS2 was crystallized with single-crystalline nature and preferential orientation growth. Mössbauer spectrum exhibited a six-peak hyperfine magnetic spectrum and a single nonmagnetic peak. Elemental analysis gave the atomic ratio of Cu:Fe:S of 1:1.02:2.10. The influence factors on the formation of CuFeS2 ultrafine powder are discussed.
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6

Mikhailovskii, A. P., A. M. Polubotko, V. D. Prochukhan, and Yu V. Rud. "Gapless State in CuFeS2." physica status solidi (b) 158, no. 1 (March 1, 1990): 229–38. http://dx.doi.org/10.1002/pssb.2221580122.

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7

Liu, Zezhong, Zengxu Liu, Zhen Zhao, Danxia Li, Pengfei Zhang, Yanfang Zhang, Xiangyong Liu, Xiaoteng Ding, and Yuanhong Xu. "Photothermal Regulated Nanozyme of CuFeS2 Nanoparticles for Efficiently Promoting Wound Healing Infected by Multidrug Resistant Bacteria." Nanomaterials 12, no. 14 (July 19, 2022): 2469. http://dx.doi.org/10.3390/nano12142469.

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Анотація:
Peroxidase-mediated chemokinetic therapy (CDT) can effectively resist bacteria; however, factors such as the high dosage of drugs seriously limit the antibacterial effect. Herein, CuFeS2 nanoparticles (NPs) nanozyme antibacterial system with the photothermal effect and peroxidase-like catalytic activity are proposed as a combined antibacterial agent with biosafety, high-efficiency, and broad-spectrum antibacterial ability. In addition, the as-obtained CuFeS2 NPs with a low doses of Cu+ and Fe3+ can change the permeability of bacterial cell membranes and break the antioxidant balance by consuming intracellular glutathione (GSH), which results in more conducive ROS production. Meanwhile, the photothermal heating can regulate the CuFeS2 NPs close to their optimal reaction temperature (60 °C) to release more hydroxyl radical in low concentrations of H2O2 (100 µM). The proposed CuFeS2 NPs-based antibacterial system achieve more than 99% inactivation efficiency of methicillin-resistant Staphylococcus aureus (106 CFU mL−1 MRSA), hyperspectral bacteria β-Escherichia coli (106 CFU mL−1 ESBL) and Pseudomonas aeruginosa (106 CFU mL−1 PA), even at low concentration (2 μg mL−1), which is superior to those of the conventional CuO NPs at 4 mg mL−1 reported in the literature. In vivo experiments further confirm that CuFeS2 NPs can effectively treat wounds infected by MRSA and promote the wound healing. This study demonstrates that excellent antibacterial ability and good biocompatibility make CuFeS2 NPs a potential anti-infection nanozyme with broad application prospects.
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8

Korzun, Barys, and Anatoly Pushkarev. "XRPD and Scanning Electron Microscopy of Alloys of the CuAlS2 – CuFeS2 System Prepared by Thermobaric Treatment." MRS Advances 3, no. 56 (2018): 3323–28. http://dx.doi.org/10.1557/adv.2018.558.

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ABSTRACTAlloys of the CuAlS2 – CuFeS2 system were prepared by thermobaric treatment at high pressure of 5.5 GPa and temperatures ranging from 573 to 1573 K and phase formation in the system was investigated using X-ray powder diffraction, optical microscopy and scanning electron microscopy equipped with energy dispersive spectroscopy. The unit-cell parameters (the lattice constants and the unit-cell volume) were computed as a function of the composition. Absence of complete solubility in the (CuAlS2)1-x-(CuFeS2)x system was established. Formation of solid solutions with the tetragonal structure of chalcopyrite was detected for compositions with the molar part of CuFeS2 x not exceeding 0.10.
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Sugathan, Anumol, Biswajit Bhattacharyya, V. V. R. Kishore, Abhinav Kumar, Guru Pratheep Rajasekar, D. D. Sarma, and Anshu Pandey. "Why Does CuFeS2 Resemble Gold?" Journal of Physical Chemistry Letters 9, no. 4 (January 30, 2018): 696–701. http://dx.doi.org/10.1021/acs.jpclett.7b03190.

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10

Korzun, B. V., A. A. Fadzeyeva, G. Kloess та K. Bente. "Microstructure of CuFeS2-δ-CuInS2alloys". physica status solidi (c) 6, № 5 (травень 2009): 1055–58. http://dx.doi.org/10.1002/pssc.200881160.

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Більше джерел

Дисертації з теми "CuFeS2"

1

Godfrey, Daniel. "Synthesis, analysis and characterisation of CuFeS2(s) towards superior, green Cu(aq) leaching." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/55165.

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Efforts to decrease reliance on traditional high-consumption CuFeS2(s) pyrometallurgy, have focused on delivering hydrometallurgic solutions to the beneficiation of sulfide ores. Ionic liquids (IL) have been proposed as a potentially higher performance and more benign alternative to conventional acid-SO42-(aq) for CuFeS2(s) dissolution, although the sheer number of IL variants complicates the search for the most efficient systems. This study focuses on Cu2+(aq)-leaching performance in hydrogensulfate IL(aq)-CuFeS2(s) systems and comparisons with equivalent acidity conventional-SO42-(aq) references. A single commercial CuFeS2(s) ore source is used throughout. A combinatorial strategy is applied to low-volume scale identification of high performance IL(aq) lixiviant systems. Implementation of a high performance, flexible automated workstation is presented with broad applicability to study of acidic-CuFeS2(s) dissolution. Electrochemical ASV is demonstrated to be an effective screening tool for [Cu2+](aq) extraction quantification, as verified by ICP-AES measurements throughout. Successfully ASV modifications are described; most notably a procedure for automated in situ electrochemical monitoring of 120 mL-scale CuFeS2(s) dissolution. High accuracy reconstructed (continuous) Cu2+(aq) extraction profiles offer precise rate determinations and treatment of previously unconsidered profile features. Application of the robotic custom instrument demonstrates high-throughput electrochemical screening of IL(aq) sample arrays with minimal consumption and precise [Cu2+](aq) measurements. Proof-of-concept screening assays find >102 difference in IL(aq) activities in equivalent conditions and at least 35-fold larger than sample-to sample variability. A large degree of variability in IL(aq) lixiviant activity is presented at nominal [HSO4](aq) and acidity for closely structurally-related ILs. Best performing [CnCmim][HSO4](aq) and [NR4∙HSO4(aq)](aq) IL(aq) systems are presented, alongside the confirmation of a non-trivial [IL](aq) dependence, which is a contrasting result to previous work with Cu flotation concentrates. Several ILs have been found to provide significant leaching at low acidity, ‘additive-quantity’ [IL](aq). Best performing IL(aq) systems have been scrutinised in an up-scaled tank leaching configuration for ~1 month leach durations. 450 mmol∙dm-3 NH4∙HSO4(aq) is demonstrated to enhance CuFeS2(s) dissolution compared with equivalent acidity H2SO4 under otherwise equal conditions. A combination of surface, bulk and solution speciation studies are untaken to obtain a global view of the IL(aq)-CuFeS2(s) dissolution process, with continuous in situ monitoring of key physical conditions ([Mn+](aq), [H+](aq), T, Eh). The role of surface oxygen and sulfur in CuFeS2(s) dissolution hindrance is examined. Experimental insights provided by consideration of the effect of SO42-(aq) and base addition to the primitive IL(aq) lixiviant media has led to the proposal of a HSO4-IL dissolution mechanism for CuFeS2(s).
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House, Charles Iain. "The electrogeneration of Cr(II) and V(II) solutions and the hydrometallurgical reduction of SnO2, PbS and CuFeS2." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38039.

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3

Oliveira, Lucas Agostinho de. "Fotoeletrodos de CuFeO2 : eletrossíntese e caracterização." Universidade Estadual de Londrina. Centro de Ciências Exatas. Programa de Pós-Graduação em Química, 2014. http://www.bibliotecadigital.uel.br/document/?code=vtls000190556.

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Анотація:
Devido às preocupações ambientais nas últimas décadas novas fontes de energia sustentáveis estão sendo, cada vez mais, levadas em consideração para o uso na sociedade atual. Neste sentido, o hidrogênio produzido a partir da radiação solar pode ser considerado uma energia alternativa. Portanto existe um grande interesse na síntese e identificação a baixo custo/benefício de semicondutores do tipo p baseados em óxidos ativos na faixa do visível. Neste contexto, a síntese de filmes finos de CuFeO2 foi realizada por eletroprecipitação potenciostática e pulsada via redução de nitrato e de CuFeO2 na forma de pó nanoestruturado pelo método de síntese de combustão em solução (SCS) utilizando como combustíveis separadamente ácido cítrico, alanina, glicina e uréia na presença e na ausência do surfatante Tween 80® e sua caracterização física e fotocatalítica. As eletroprecipitações pulsada e potenciostática apresentaram-se eficazes para a síntese eletroquímica de filmes finos de CuFeO2. Os melhores potenciais para eletroprecipitação de Cu e Fe foram -0,1 V e -0,9 V, respectivamente, e a melhor razão molar Cu/Fe na solução precursora foi de 1:1. O filme obtido por eletroprecipitação pulsada apresentou-se mais cristalino e homogêneo que o filme obtido por eletroprecipitação a potencial fixo, no entanto, os filmes apresentaram fases de CuFeO2, CuFe2O4 e CuO. Os filmes apresentaram transição direta entre as BV e BC, com Ebg correspondente à CuFeO2 de 1,70 eV e 1,52 eV para os filmes eletroprecipitados a potencial fixo e pulsado, respectivamente. O filme obtido por eletroprecipitação pulsada apresentou fotocorrente de 36 μA e o filme eletroprecipitado a potencial fixo de 9 μA. Os potenciais eletroquímicos das BV e BC são de -0,3 e 1,4 para o filme eletrodepositado a potencial fixo, respectivamente, e de -0,27 e 1,25 para o filme eletrodepositado a potencial pulsado. As amostras obtidas por SCS apresentaram em suas composições CuFeO2, CuFe2O4, CuO e Fe2O3. Ambas as amostras sintetizadas por SCS com razão molar de combustível/metais de 1:1 e 2:1 e a amostra obtida por síntese em estado sólido calcinadas a 600°C apresentaram a mesma atividade fotocatalítica, enquanto a amostra sintetizada por SCS calcinada a 1000°C apresentou atividade fotocatalítica aproximadamente 50 % maior que as outras. A presença de Tween 80® aumentou a atividade fotocatalítica das amostras sem o surfatante, tendência apresentada também pelos difratogramas. A amostra obtida pela alanina na presença do surfatante apresentou a maior atividade fotocatalítica, enquanto a amostra sintetizada apenas com a alanina apresentou a menor atividade fotocatalítica entre todos os combustíveis utilizados.
Due to environmental concerns in recent decades new sustainable energy sources are being increasingly taken into consideration for use in today's society. Accordingly, the hydrogen produced from solar radiation can be considered an alternative energy. There is great interest in the synthesis and identification at low cost/benefit of p-type semiconductor oxides-based assets in the visible range. In this context, the synthesis of thin films CuFeO2 was performed by potentiostatic electroprecipitation and pulsed electroprecipitation route nitrate reduction and CuFeO2 in the form of nanostructured powders by combustion synthesis in solution method (CSS ) using as fuel separately citric acid, alanine, glycine and urea in the presence and absence of the surfactant Tween 80®, and their physical and photocatalytic characterization. The pulsed and potentiostatic electroprecipitation showed to be effective for the electrochemical synthesis of thin films of CuFeO2 route nitrate reduction. The most suitable potential for electroprecipitation of Cu and Fe were -0.1 V and -0.9 V, respectively , and the best Cu/Fe mole ratio in the precursor solution was 1:1. The film obtained by pulsed electroprecipitation found to be more crystalline and homogeneous film obtained by the fixed potential, however, the films exhibited phases CuFeO2, CuFe2O4 and CuO. The films showed direct transition between BV and BC, with the corresponding Ebg to CuFeO2 1.70 eV and 1.52 eV for the films obtained by fixed and pulsed potential, respectively. The film obtained by pulsed electroprecipitation had photocurrent (36 μA ) 4 times higher than the obtained fixed potential film (9 μA ) . The electrochemical potential of BV and BC are 0,41 and -1,29 for the film electrodeposited at a fixed potential, respectively, and 0,41 and -1,16 for the pulsed potential electrodeposited film. The samples obtained by CSS presented in their compositions CuFeO2, CuFe2O4, CuO and Fe2O3. Both samples synthesized by CSS with a fuel/metal molar ratio of the of 1:1 and 2:1 ratios and the sample obtained by solid state synthesis calcined at 600 ° C showed almost the same photocatalytic activity while the sample synthesized by CSS with fuel/metal molar ratio of 1:1 calcined at 1000 ° C showed photocatalytic activity about 50 % higher than the other. The presence of Tween 80® increased the photocatalytic activity of the samples without surfactant, a trend also shown by XRD patterns . The sample obtained by alanine in the presence of surfactant showed the highest photocatalytic activity, whereas the sample synthesized only with alanine had the lowest photocatalytic activity among all fuels.
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4

Forslund, Axel. "Synthesis and characterisation of delafossite CuFeO2 for solar energy applications." Thesis, Uppsala universitet, Fasta tillståndets fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-297710.

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Delafossite CuFeO2 is an intrinsic p-type semiconductor with a band gap around 1.5 eV. Further, it is composed of relatively abundant, nontoxic elements, and therefor have potential to be an attractive material for solar energy harvesting.This work examines three routes to synthesise this material. The first includes a sol-gel deposition and then relies on solid state reaction above 650 degrees Celsius in inert gas atmosphere. In this work, no delafossite is obtained with this method.The second method is a hydrothermal route to make particles under hydrostatic pressure in an autoclave. Delafossite is obtained mixed with other phases.The third route includes aqueous precipitation similar to the second route, but a temperature of 70 degrees Celsius and ambient pressure is sufficient to produce a pure delafossite particle phase. It provides a robust and simple way to make delafossite CuFeO2 particles.The resulting particles are deposited and compressed on glass into thin films.The films have a band gap slightly below 1.5 eV and show some photoactivity in electrochemical measurements.
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5

Hermans, Yannick. "Interface analysis and development of BiVO4 and CuFeO2 heterostructures for photochemical water splitting." Phd thesis, Bordeaux, 2019. http://tuprints.ulb.tu-darmstadt.de/8700/1/Complete_thesis%20-%20German.pdf.

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Solar photo(electro)chemical (PEC) water splitting is regarded as a promising ways of renewable hydrogen production. Especially, type 2 PEC systems, in which the necessary energy needed to split water can be supplied by two complimentary photoabsorbers, have the potential to economically compete with steam methane reforming, the conventional hydrogen production method. In this work, BiVO4 and CuFeO2 were chosen to perform the water oxidation and water reduction reaction, respectively. However, according to literature additional contact materials are required to achieve a reasonable water splitting performance. The exact benefits of these contact materials have not yet been completely elucidated. Therefore, we opted in this work to investigate the junction properties of certain BiVO4 and CuFeO2 based heterostructures through so called interface experiments, whereby a certain contact material was stepwise sputtered onto a BiVO4 or CuFeO2 substrate, performing photoelectron spectroscopy measurements in between each deposition step. In this way we could interpret the band alignment between the substrate and the contact material, as well as determine the Fermi level tunability for the studied photoabsorbers. In parallel, new anisotropic CuFeO2 and BiVO4 based heterostructured powders were created through photodeposition. In particular, silver, platinum, cobalt(oxy)(hydr)oxide and nickel(oxy)(hydr)oxide were successfully deposited onto anisotropically shaped BiVO4 and CuFeO2 powders. These powders were tested as well for their performance in photochemical water splitting.
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6

Sono, Sandisiwe. "Comparing estimates of zooplankton abundance from CUFES samples with those from a vertical bongo net." Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/6456.

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Анотація:
Includes bibliographical references (leaves 27-32).
The accuracy of using CUFES (continuous underway fish egg sampler) as an alternative method to vertical bongo nets for sampling zooplankton abundance and distribution is assessed. Analysis is based on 14 taxonomic groups representing a wide variety of organism sizes. Samples were collected in March 2004 in the southern Benguela, South Africa. In total, 64 CUFES samples were collected while the ship was underway and 32 CUFES and vertical bongo net on-station samples were collected along four inshore-offshore transects. The frequencies of obtaining the taxa using the CUFES and vertical bongo net samples were the same for small copepods, amphipod adults and juveniles, and Nannocalanus.
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Hermans, Yannick [Verfasser], Wolfram [Akademischer Betreuer] Jaegermann, and Thierry [Akademischer Betreuer] Toupance. "Interface analysis and development of BiVO4 and CuFeO2 heterostructures for photochemical water splitting / Yannick Hermans ; Wolfram Jaegermann, Thierry Toupance." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2019. http://d-nb.info/1188817647/34.

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Lusa, Makeli Garibotti. "Caracterização morfoanatômica e histoquímica de Cuphea Carthagenensis (Jacq.) J.F. Macbr.(Lytraceace) e avaliação em ambientes hidrofítico e mesofítico." reponame:Repositório Institucional da UFPR, 2010. http://hdl.handle.net/1884/23385.

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Schuldt, Elke Zuleika. "Avaliação farmacológica do extrato bruto hidroalcóolico, frações e composto isolado de Cuphea carthagenensis Jacq McBrite (sete-sangrias) determinação da capacidade de antioxidante /." Florianópolis, SC, 1999. http://repositorio.ufsc.br/xmlui/handle/123456789/81043.

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Анотація:
Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas.
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Lalanne, Maëva. "Étude de phases delafossite CuFe1-xCrxO2 : vers de nouveaux TCO de type p." Toulouse 3, 2010. http://thesesups.ups-tlse.fr/1257/.

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Анотація:
Ces travaux ont pour objectif d'élaborer sous forme de couches minces des phases delafossite CuFe1-xCrxO2:Mg par pulvérisation cathodique radiofréquence, en vue de leur utilisation potentielle en tant que conducteurs transparents. Différentes poudres de composition CuFe1-xCrxO2 (0 = x = 1) ont été élaborées par réaction à l'état solide. Ces oxydes cristallisent avec la structure delafossite et une solution solide complète a été obtenue. L'étude thermostructurale de ces composés nous a permis de définir leur domaine de stabilité sous atmosphère oxydante et réductrice. Des caractérisations physico-chimiques ont également été effectuées sur ces matériaux. Nous avons ainsi montré que le domaine de stabilité des phases CuFe1-xCrxO2 augmente avec la quantité de chrome et que les composés riches en chrome sont les plus conducteurs et les moins absorbants. Au vue de ces résultats, des films minces de delafossite de composition CuFeO2:Mg et CuCrO2:Mg ont été obtenus par pulvérisation cathodique RF à température ambiante à partir des cibles céramiques. Après recuit sous vide à 450°C, les propriétés optoélectroniques des dépôts de CuFeO2:Mg se sont avérées limitées pour une utilisation en tant que TCO de type p dans le domaine du visible ; toutefois ces composés restent prometteurs pour des applications dans l'infra-rouge ou comme matériaux absorbeurs dans le visible. Les couches minces de CuCrO2:Mg présentent, après recuit sous vide à 450°C, une conductivité de type p de l'ordre de 0,1 S. Cm-1 et un gap optique de 3,13 eV. Ces valeurs peuvent être augmentées par des recuits à des températures supérieures à 450°C
This work concerns the development of CuFe1-xCrxO2:Mg delafossite oxide thin films deposited by RF-magnetron sputtering for the potential transparent conductor applications. Various CuFe1-xCrxO2 (0 = x = 1) powders were synthesized by a standard solid-state reaction. These oxides crystallize with the delafossite structure and a complete solid solution was obtained. Thermo-structural study has revealed the stability range of CuFe1-xCrxO2 compounds under oxidizing and reducing atmosphere. Their physical properties were also characterized. Thus, we showed that the stability range increases with the chromium quantity and chromium-rich delafossites are the most conductive and the least absorbent. Then, CuFeO2:Mg and CuCrO2:Mg delafossite thin films were prepared at room temperature by RF-magnetron sputtering from ceramic targets. After annealing under vacuum at 450°C, CuFeO2:Mg thin films have too low optoelectronic properties for p-type TCO application in the visible range; however these compounds are promising for infra-red TCO applications and/or absorber for photovoltaic application. After annealing under vacuum at 450°C, the p-type conductivity and the bandgap of CuCrO2:Mg thin films are about 0,1 S. Cm-1 and 3,13 eV respectively. These values can be increased by annealing at higher temperature than 450°C
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Книги з теми "CuFeS2"

1

CUFFS: Cuffs / holiday hookup. [Place of publication not identified]: MILLS & BOON, 2020.

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2

Cocek, Christina. Stiff cuffs. Boston (100 Chauncy St., Boston 02111): Baker's Plays, 1994.

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3

Knitting beyond the edge: Cuffs & collars, necklines, corners & edges, closures : the essential collection of decorative finishes. [New York]: Sixth&Spring Books, 2006.

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4

Jackie, Sheeler, and Holman Bob 1948-, eds. Off the cuffs: Poetry by and about the police. Brooklyn, NY: Soft Skull Press, 2003.

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5

Scott, Tui A. The Harris family history: (including Cuffs, Mastersons, De Witts, and others). Morrinsville: T.A. Scott, 1988.

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6

Field, Elaine. Cuddly Cuffs Clothes (Cuddly Cuffs). Tiger Tales, 2003.

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7

Field, Elaine. Cuddly Cuffs Toys (Cuddly Cuffs). Tiger Tales, 2003.

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8

Lockwood, Cara. Cuffs. Harlequin Enterprises ULC, 2020.

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Lockwood, Cara. Cuffs. Harlequin Mills & Boon, Limited, 2020.

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10

Finn, Rebecca. Cuddly Cuffs (Animal Faces Cuddly Cuffs). Little Tiger Press, 2004.

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Частини книг з теми "CuFeS2"

1

Kobayashi, Hisao, Hideya Onodera, and Takashi Kamimura. "Electronic Properties of CuFeS2 under Pressure Studied by Mössbauer Spectroscopy." In Hyperfine Interactions (C), 165–68. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0281-3_41.

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2

Mulaba-Bafubiandi, Antoine F. "Characterization of products emanating from conventional and microwave energy roasting of chalcopyrite (CuFeS2) concentrate." In ICAME 2005, 923–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-49853-7_37.

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3

Villars, P., K. Cenzual, J. Daams, R. Gladyshevskii, O. Shcherban, V. Dubenskyy, N. Melnichenko-Koblyuk, et al. "CuFeO2." In Structure Types. Part 5: Space Groups (173) P63 - (166) R-3m, 495–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-46933-9_384.

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4

Kawazoe, Yoshiyuki, Takeshi Kanomata, and Ryunosuke Note. "CuFeO2." In High Pressure Materials Properties: Magnetic Properties of Oxides Under Pressure, 143–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-64593-2_29.

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5

McConnell, Larissa. "Cuffs." In Foundations of Flat Patterning and Draping, 228–30. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003022619-14.

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6

Posypaiko, V. I., and E. A. Alekseeva. "CuF2." In Phase Equilibria in Binary Halides, 162. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4684-9024-4_45.

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7

Nolan, Thomas. "“Taking Off the Cuffs”." In Perilous Policing, 126–42. Abingdon, Oxon ; New York, NY : Routledge, 2019. | Identifiers: LCCN 2018048190 (print) | LCCN 2018051056 (ebook) | ISBN 9780429398414 (Ebook) | ISBN 9780367026691 (hardback) | ISBN 9780367026707 (pbk.): Routledge, 2019. http://dx.doi.org/10.4324/9780429398414-9.

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8

Bell, Matthew, and Gary Armstrong. "The Attraction of ‘Fisti-Cuffs’." In A Social History of Sheffield Boxing, Volume I, 51–90. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63545-9_3.

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9

Spittel, Marlene, and Thilo Spittel. "Flow stress, mechanical and physical properties of CuFe2P." In Part 3: Non-ferrous Alloys - Heavy Metals, 161–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-14174-4_15.

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10

Hirota, E., K. Kuchitsu, T. Steimle, J. Vogt, and N. Vogt. "109 CuFN2 Copper fluoride – dinitrogen (1/1)." In Molecules Containing No Carbon Atoms and Molecules Containing One or Two Carbon Atoms, 140. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-540-70614-4_110.

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Тези доповідей конференцій з теми "CuFeS2"

1

Tonpe, Dipak, Ketan Gattu, Ganesh More, Deepak Upadhye, Sandip Mahajan, and Ramphal Sharma. "Synthesis of CuFeS2 thin films from acidic chemical baths." In INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2015): Proceeding of International Conference on Condensed Matter and Applied Physics. Author(s), 2016. http://dx.doi.org/10.1063/1.4946727.

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Nawaz, Sajid, Khalid Hussain Thebo, Mohammad Azad Malik, and Abdul Qadeer Malik. "Deposition of CuFeS2 and Cu2FeSnS4 thin films and nanocrystals using diisobutyldithiophosphinato-metal precursors." In 2020 17th International Bhurban Conference on Applied Sciences and Technology (IBCAST). IEEE, 2020. http://dx.doi.org/10.1109/ibcast47879.2020.9044518.

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3

Tonpe, Dipak A., Ketan P. Gattu, Vishnu V. Kutwade, Makrand E. Sonawane, and Ramphal Sharma. "Growth and optoelectronic properties of CuFeS2 thin film and effect of annealing temperature." In NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0061419.

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Bellec, Jacques H., and Tahar M. Kechadi. "Cufres." In the ACM first Ph.D. workshop in CIKM. New York, New York, USA: ACM Press, 2007. http://dx.doi.org/10.1145/1316874.1316884.

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Dhruv, Preksha N., Neha P. Solanki, and Rajshree B. Jotania. "Structural properties of delafossite multiferroic CuFeO2 powder." In FUNCTIONAL OXIDES AND NANOMATERIALS: Proceedings of the International Conference on Functional Oxides and Nanomaterials. Author(s), 2017. http://dx.doi.org/10.1063/1.4982089.

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Ruttanapun, Chesta, Yuttana Hongaromkid, Warawoot Thowladda, and Aree Wichainchai. "Alcohol sensing of p-type CuFeO2 delafossite oxide." In International Conference on Photonics Solutions 2013, edited by Prathan Buranasiri and Sarun Sumriddetchkajorn. SPIE, 2013. http://dx.doi.org/10.1117/12.2021102.

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Singh, Manoj K., G. L. Sharma, S. Dussan, and Ram S. Katiyar. "Structural properties of multiferroic CuFeO2 thin films prepared by RF sputtering." In 2008 17th IEEE International Symposium on the Applications of Ferroelectrics (ISAF). IEEE, 2008. http://dx.doi.org/10.1109/isaf.2008.4693787.

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Lee, P. C., M. N. Ou, J. Y. Luo, M. K. Wu, and Y. Y. Chen. "Cross-plane Seebeck coefficient and thermal conductivity of CuFeSe2 thin film." In 9TH EUROPEAN CONFERENCE ON THERMOELECTRICS: ECT2011. AIP, 2012. http://dx.doi.org/10.1063/1.4731582.

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Jiang, Chang-Ming, Ian Sharp, and Jason Cooper. "Electronic Structure of CuFeO2 Photocathode Studied by Resonant Inelastic X-ray Scattering." In nanoGe Fall Meeting 2018. València: Fundació Scito, 2018. http://dx.doi.org/10.29363/nanoge.fallmeeting.2018.161.

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Jiang, Chang-Ming, Ian Sharp, and Jason Cooper. "Electronic Structure of CuFeO2 Photocathode Studied by Resonant Inelastic X-ray Scattering." In nanoGe Fall Meeting 2018. València: Fundació Scito, 2018. http://dx.doi.org/10.29363/nanoge.nfm.2018.161.

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