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Artículos de revistas sobre el tema "Copper, Zinc, Aluminum (CZA)"

Autor: Grafiati
Publicado: 30 de noviembre de 2024
Última modificación: 31 de julio de 2025

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1

Xie, Zhong, Jinpei Hei, Lei Cheng, Jing Li, Xiaojie Yin, and Sugang Meng. "Influence of Cu/Al Ratio on the Performance of Carbon-Supported Cu/ZnO/Al2O3 Catalysts for CO2 Hydrogenation to Methanol." Catalysts 13, no. 5 (2023): 800. http://dx.doi.org/10.3390/catal13050800.

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CO2 hydrogenation to methanol was conducted using a set of activated carbon-supported Cu/ZnO/Al2O3 catalysts (CCZA) prepared by an incipient wetness impregnation approach. The effect of the Cu/Al ratio on the physicochemical properties of the catalysts, as well as their catalytic performance, were investigated. As Cu/Al ratio increased, the metallic Cu surface area displayed a reducing trend from 6.88 to 4.18 m2∙gcat−1, while the CO2 adsorption capacity exhibited an increasing trend. Meanwhile, aluminum content will have an important effect on the catalysts’ reducibility and, thus, on their ca
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2

Krasnobaeva, O. N., V. P. Danilov, T. A. Nosova, E. V. Bazhenova, and E. Yu Georgievskaya. "ChemInform Abstract: Zinc Aluminum, Copper Aluminum, and Zinc Copper Aluminum Hydroxo Salts with a Layered Hydrotalcite-Type Structure." ChemInform 30, no. 31 (2010): no. http://dx.doi.org/10.1002/chin.199931024.

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3

Duma, Zama G., Xoliswa Dyosiba, John Moma, et al. "Thermocatalytic Hydrogenation of CO2 to Methanol Using Cu-ZnO Bimetallic Catalysts Supported on Metal–Organic Frameworks." Catalysts 12, no. 4 (2022): 401. http://dx.doi.org/10.3390/catal12040401.

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The thermocatalytic hydrogenation of carbon dioxide (CO2) to methanol is considered as a potential route for green hydrogen storage as well as a mean for utilizing captured CO2, owing to the many established applications of methanol. Copper–zinc bimetallic catalysts supported on a zirconium-based UiO-66 metal–organic framework (MOF) were prepared via slurry phase impregnation and benchmarked against the promoted, co-precipitated, conventional ternary CuO/ZnO/Al2O3 (CZA) catalyst for the thermocatalytic hydrogenation of CO2 to methanol. A decrease in crystallinity and specific surface area of t
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4

Raghavan, V. "Al-Cu-Zn (Aluminum-Copper-Zinc)." Journal of Phase Equilibria and Diffusion 28, no. 2 (2007): 183–88. http://dx.doi.org/10.1007/s11669-007-9025-x.

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5

Raghavan, V. "Al-Cu-Zn (Aluminum-Copper-Zinc)." Journal of Phase Equilibria and Diffusion 31, no. 1 (2009): 41–42. http://dx.doi.org/10.1007/s11669-009-9620-0.

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6

Ramakrishnan, Abinavnataraj, Simmy Rathod, Wakshum Mekonnen Tucho, Sachin M. Chavan, and Zhixin Yu. "MOF-808 as Effective Support for Cu-Based Catalyst for CO2 Hydrogenation to Methanol." Catalysts 15, no. 4 (2025): 324. https://doi.org/10.3390/catal15040324.

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The thermocatalytic hydrogenation of CO2 to methanol offers a promising route for reducing greenhouse gas emissions (GHG) and producing valuable chemicals and fuels. In this study, copper–zinc bimetallic catalysts supported on a zirconium-based MOF-808 framework were synthesized via a facile deposition–precipitation method and compared to a conventional Cu/ZnO/Al2O3 (CZA) catalyst. MOF-808 was selected due to its high surface area and porous structure, which enhance metal dispersion. Characterization through X-ray diffraction (XRD) and N2 physisorption showed significant changes in surface are
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7

Raghavan, V. "Al-Cu-Mg-Zn (Aluminum-Copper-Magnesium-Zinc)." Journal of Phase Equilibria and Diffusion 28, no. 2 (2007): 211–12. http://dx.doi.org/10.1007/s11669-007-9032-y.

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8

Комарова, М. В., and А. Г. Вакутин. "INVESTIGATION OF THE INTERACTION OF UDP METALS WITH PRODUCTS OF THERMAL DECOMPOSITION OF TETRAZOLE BINDER." Южно-Сибирский научный вестник, no. 6(40) (December 20, 2021): 276–80. http://dx.doi.org/10.25699/sssb.2021.40.6.041.

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В статье приводятся экспериментальные исследования ультрадисперсных металлических порошков алюминия, меди, железа, вольфрама, титана, цинка, никеля, сплавов меди с алюминием, меди с железом и латуни. Описаны термические свойства их смесей с метилполивинилтетразолом, пластифицированным динитратпропиленгликолем; указаны численные величины значимых характеристик.Результаты исследования показали, что существенное количество тепла выделяется при нагреве порошков алюминия, цинка, титана и железа; при нагреве смесей со связующим, наилучшие результаты соответствуют сплаву меди с железом, алюминию и сп
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9

Kolenak, Roman, Igor Kostolny, Jaromir Drapala, Paulina Babincova, and Martin Sahul. "Characterizing the Soldering Alloy Type Zn–Al–Cu and Study of Ultrasonic Soldering of Al7075/Cu Combination." Metals 11, no. 1 (2020): 27. http://dx.doi.org/10.3390/met11010027.

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The aim of the research was to characterize the soldering alloy type Zn–Al–Cu and study the fluxless ultrasonic soldering of the combination of aluminum alloy type Al7075 with copper substrate. The Zn–Al–Cu solder is of the close-to-eutectic type with two phase transformations: the eutectic transformation at 378 °C and the eutectoid transformation at 285 °C. The solder microstructure is formed of a matrix composed of the solid solutions of aluminum (Al) and zinc (Zn) in which the copper phases CuZn4 and CuAl2 are precipitated. The shear strength of the soldering alloy type Zn5Al with copper ad
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10

Li, Bin, Jiancheng Li, Rui Liu, Hongping Zhu, and Herbert W. Roesky. "Facile Route to Rare Heterobimetallic Aluminum–Copper and Aluminum–Zinc Selenide Clusters." Inorganic Chemistry 56, no. 6 (2017): 3136–39. http://dx.doi.org/10.1021/acs.inorgchem.7b00012.

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11

Garanin, Roman, and Igor Lykov. "Biosorption of zinc and copper ions by immobilized yeast under aerobic and anaerobic conditions." E3S Web of Conferences 548 (2024): 02004. http://dx.doi.org/10.1051/e3sconf/202454802004.

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Studies have been conducted to evaluate the efficiency of biosorption of zinc and copper ions by brewing yeast Saccharomyces cerevisiae immobilized on alginates. The studies were carried out under aerobic and anaerobic conditions using calcium, calcium, magnesium, and aluminum alginates. Under aerobic conditions, when live yeast was immobilized in calcium alginate, the concentration of zinc ions in an aqueous solution decreased within 2 hours by 99.76%, and copper ions by 91.7%. Biosorbents based on a mixture of calcium and magnesium alginates work less effectively (reducing the concentration
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12

Fridlyander, I. N. "High-Strength Aluminum Alloys with Zinc, Magnesium, and Copper." Metal Science and Heat Treatment 45, no. 9/10 (2003): 341–43. http://dx.doi.org/10.1023/b:msat.0000009777.50737.71.

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13

Mohammad Salim, Haydar A., Hasan Ramadhan Abdo, Faris Jameel Buni, Idrees Majeed Kareem, Mothanna Abdula Najeeb, and Bafreen Ahmad Hussen. "Estimation and Correlation Analysis of Heavy Metals of Some Well Water in Zakho City, Iraq." Science Journal of University of Zakho 5, no. 2 (2017): 205. http://dx.doi.org/10.25271/2017.5.2.369.

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This study was carried out to examine the concentrations of major heavy metals in fifteen different well water in Zakho City, Kurdistan Region, Iraq. The studied heavy metals were iron, copper, chromium, aluminum, cadmium, cobalt, nickel, manganese, zinc and lead. The results obtained in the studied area showed that copper, chromium, cobalt, zinc, manganese, aluminum, iron and lead were within the acceptable limits as recommended by WHO for water drinking. However, in all studied areas, cadmium and nickel were mostly founded to exceed the maximum permissible limit set by WHO. It is found that
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14

Oravcová, Kristína, and Vladimír Danielik. "Corrosion of metals in zinc nitrate hexahydrate and calcium chloride hexahydrate." Acta Chimica Slovaca 11, no. 1 (2018): 51–54. http://dx.doi.org/10.2478/acs-2018-0008.

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Abstract Materials used for heat accumulation are substances with the phase change at temperatures below 80 °C. In such substances, a high amount of energy can be stored due the phase change. Because of possible corrosion of the heat container components, it is necessary to know their resistance in the given medium. In this work, the corrosion of aluminum, copper and carbon steel was studied in two liquid media: zinc nitrate hexahydrate and calcium chloride hexahydrate. Corrosion tests have shown that steel is the least resistant to corrosion in both media. Aluminum has been proved as the most
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15

Chen, Ping-Hang, Wen-Jauh Chen, and Jiun-Yi Tseng. "Thermal Stability of the Copper and the AZO Layer on Textured Silicon." Coatings 11, no. 12 (2021): 1546. http://dx.doi.org/10.3390/coatings11121546.

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Transparent conductive oxide (TCO) film is the most widely used front electrode in silicon heterojunction (SHJ) solar cells. A copper metallization scheme can be applied to the SHJ process. The abundance of zinc in the earth’s crust makes aluminum-doped zinc oxide (AZO) an attractive low-cost substitute for indium-based TCOs. No work has focused on the properties of the copper and AZO layers on the textured silicon for solar cells. This work deposited an aluminum-doped zinc oxide layer and copper metal layer on textured (001) silicon by a sputtering to form Cu/AZO/Si stacks. The structures of
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16

Wang, Chong Bi, Xiao Dong Kong, and Zhi Qiang Tian. "Evaluation of the Protection Effect on Copper with Different Sacrificial Anodes." Advanced Materials Research 602-604 (December 2012): 579–83. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.579.

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Sacrificial anodes performance of three iron alloys was measured by constant current test, The protection effects of iron alloys, zinc alloy and aluminum alloy sacrificial anodes on copper tube were compared and analysed by polarization test. The results show that all three iron alloys appearing well sacrificial anodes performance, with steady working potential, high practical electric capacity and current efficiency, the corrosion is uniform and the corrosion products fall easily. Iron alloys are more suitable for application on the cathodic protection of copper tube due to their more suitabl
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17

Fujii, I., K. Tsuchiya, Y. Shikakura, and M. S. Murthy. "Consideration on Thermal Decomposition of Calcium Hydroxide Pellets for Energy Storage." Journal of Solar Energy Engineering 111, no. 3 (1989): 245–50. http://dx.doi.org/10.1115/1.3268314.

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The reversible chemical reaction of Ca(OH)2/CaO appears to be attractive for storage of solar thermal energy, in view of the nonpolluting and nontoxic nature of the reactants. This paper presents some data on thermal decomposition of calcium hydroxide pellets along with its additives of aluminum, aluminum hydroxide, zinc, and copper. The addition of aluminum and zinc powder enhanced the rate of decomposition considerably at 450° C, but copper had no effect. Considerations on the effect of additives are also discussed in some detail, though their effects are not established with certainty. Ther
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18

Iwaszczuk, Natalia, Agata Wzorek, and Bartosz Łamasz. "Relationship between Copper Price and Selected Metals Prices." Key Engineering Materials 682 (February 2016): 336–41. http://dx.doi.org/10.4028/www.scientific.net/kem.682.336.

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This paper focuses on the factors that influence the changes in copper prices. A brief review of the literature showed several areas of interests of researchers, such as global economic situation and development of Asian countries. This paper draws attention to concurrent price trends, some pairs of raw materials (e.g. copper – aluminum, copper – silver, even copper – palladium). This paper uses multiple regression model containing monthly data spanning from January 2012 to June 2015, which consist of 42 observations for metals: copper, zinc, aluminum, silver, gold, platinum and palladium. And
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19

Nako, Adi E., Qian Wen Tan, Andrew J. P. White та Mark R. Crimmin. "Weakly Coordinated Zinc and Aluminum σ-Complexes of Copper(I)". Organometallics 33, № 11 (2014): 2685–88. http://dx.doi.org/10.1021/om500380k.

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20

Lakshmi Reddy, S., T. Ravindra Reddy, Nivya Roy, et al. "Synthesis and spectroscopic characterization of copper zinc aluminum nanoferrite particles." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 127 (June 2014): 361–69. http://dx.doi.org/10.1016/j.saa.2014.02.026.

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21

Tista, Si Putu Gede Gunawan, I. Gusti Ngurah Nitya Santhiarsa, Made Ricki Murti, Putu Wijaya Sunu, and Wardoyo Wardoyo. "Utilization of coconut shell activated carbon to generate electrical energy using sodium chloride electrolyte." EUREKA: Physics and Engineering, no. 4 (July 19, 2024): 28–39. http://dx.doi.org/10.21303/2461-4262.2024.003281.

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Fossil fuels that are used to generate electrical energy are running low. Besides that, energy generated from fossil fuels causes global warming and climate change due to gas emissions such as carbon dioxide, leading to a greenhouse effect. In addition, the development of small electronic devices has created power demands, from initially in milli watt (mW), to microwatt (μW) level for wireless sensor networks, which generally use batteries as a power supply. Therefore, environmentally friendly and renewable materials like coconut shells are needed to generate electrical energy. This research a
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22

Yakushova, Nadezhda D., Ivan A. Gubich, Andrey A. Karmanov, et al. "Photocatalytic Degradation of Toxic Dyes on Cu and Al Co-Doped ZnO Nanostructured Films: A Comparative Study." Technologies 13, no. 7 (2025): 277. https://doi.org/10.3390/technologies13070277.

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The article suggests a simple one-step sol–gel method for synthesizing nanostructured zinc oxide films co-doped with copper and aluminum. It shows the possibility of forming hierarchical ZnO:Al:Cu nanostructures combining branches of different sizes and ranks and quasi-spherical fractal aggregates. It demonstrates the use of the synthesized samples as highly efficient photocatalysts providing the decomposition of toxic dyes (methyl orange) under the action of both ultraviolet radiation and visible light. It establishes the contribution of the average crystallite size, the proportion of zinc at
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23

Dileep, B. P., V. Ravi Kumar, Mrudula Prashanth, and M. V. Phanibhushana. "Effect of Zinc Coating on Mechanical Behavior of Al 7075." Applied Mechanics and Materials 592-594 (July 2014): 255–59. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.255.

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The addition of zinc to aluminum with magnesium or copper produces heat treatable alloys of highest strength which can be used for structural applications. This work is an attempt to investigate any improvement in hardness and fracture toughness by coating aluminum 7075 alloy with zinc. The zinc coated aluminum 7075 alloy was fabricated using Time Dependent Electro-Plating Technique. The thickness of the coating is a function of time. The varying thickness of zinc coating was obtained based on the time estimates, which includes 10, 15 and 20 microns. Specimens were prepared according to ASTM s
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24

Mounika, G. "Closed Loop Reactive Power Compensation on a Single-Phase Transmission Line." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 2156–59. http://dx.doi.org/10.22214/ijraset.2021.35489.

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Zinc-aluminium alloys are alloys whose main ingredients stay zinc and aluminium. Other alloying elements clasp magnesium and copper .Zinc Aluminum Alloys over the past decayed are occupying attention of both researches and industries as a promising material for tribological applications. At this moment commercially available Zinc-Aluminium alloys and bearing bronzes due to good cost ability and unique combination of properties. They can also be deliberated as competing material for cast iron, plastics and even for steels. It has been shown that the addition of alloying elements including coppe
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25

Kremenetskaya, I. P., T. K. Ivanova, B. I. Gurevich, A. I. Novikov, and V. V. Semushin. "Separate deposition of metals from highly concentrated solutions with granulated magnesia-silicate reagent." Vestnik MGTU 24, no. 1 (2021): 118–30. http://dx.doi.org/10.21443/1560-9278-2021-24-1-118-130.

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Multi-stage deposition of metals from a sulfate solution with a high concentration of iron, aluminum, copper, zinc, and nickel has been studied. The concentrations of the components correspond to the composition of the sub-basement waters of the Gaisky GOK. Granular magnesia-silicate reagent based on serpentinite (Khalilovsk magnesite deposit, the Orenburg region, Russia) has been used as an alkaline agent. The magnesia-silicate reagent's ability to reduce the acidity of solutions is due to the presence of products of destruction of the original serpentine mineral, mainly magnesium oxide. The
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26

S B, Chandrashekharaiah, Khamar Taj, and Parinitha S. "Study of Nickel-Plating Electrolysis Process on Mild Steel Material." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 12 (2024): 1–9. https://doi.org/10.55041/ijsrem40312.

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Nickel plating is used for decorative, engineering, and electroforming purposes. The typical base metals for nickel plating are steel, copper alloys, and zinc alloys. Steel and copper alloy substrates are usually plated directly, but copper underplating is required for plating on zinc. Stainless steel, aluminum, magnesium, and plastics can also be nickel plated, but they require special treatment before plating. Nickel coatings for engineering applications are usually smooth and matt, while the decorative coatings are lustrous, smooth, and bright. Bright nickel coatings are plated with thin ch
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27

Karzhavin, V. V., L. V. Maltsev, and V. V. Bakina. "Study on Surface Layers of Aluminum and Titanium Alloys and Analysis of their Scuff Resistance." Solid State Phenomena 284 (October 2018): 1248–51. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.1248.

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To reduce the risk of scoring copper or zinc coatings were applied to the samples in molten salts at a temperature of 350-500°C. Using ion sputtering and Auger electron spectroscopy the depth of the surface layers and the grain size in the coating were determined. Samples were plates 0.5-0.7 mm thick made of titanium and aluminum alloys. For copper-coated alloys a coating zone up to 10 μm and a diffuse zone up to 6 μm which is intermediate between the coating and the substrate can be distinguished in the surface layers. For zinc-coated aluminum alloys there is one zone of 5-7 μm which is an al
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28

Röllin, Halina, Claudina Nogueira, Bukola Olutola, Kalavati Channa, and Jon Odland. "Prenatal Exposure to Aluminum and Status of Selected Essential Trace Elements in Rural South African Women at Delivery." International Journal of Environmental Research and Public Health 15, no. 7 (2018): 1494. http://dx.doi.org/10.3390/ijerph15071494.

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This study sought to evaluate the in utero exposure to aluminum and status of selected trace elements in South African women at delivery since aluminum is known to be toxic in all developmental stages even at low concentrations. Serum aluminum was negatively correlated with aluminum in urine, both uncorrected and corrected for creatinine, which suggests the retention of aluminum in body stores. Serum copper and zinc levels were found to be high in this study population. Serum copper levels were negatively correlated with aluminum in serum (β = −0.095; p = 0.05). There was a marginal negative c
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29

Kostov, Ana, Aleksandra Milosavljević, Zdenka Stanojevic-Šimšić, and Corneliu Craciunescu. "Characterization of copper-based shape memory alloy with zinc and aluminum." Mining and Metallurgy Engineering Bor, no. 1-2 (2018): 79–88. http://dx.doi.org/10.5937/mmeb1802079k.

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30

Negrete, J., Y. H. Zhu, and G. Torres-Villaseñor. "Effect of Copper Modification on Impact Strength of Zinc-Aluminum Alloys." Materials Transactions, JIM 35, no. 5 (1994): 332–35. http://dx.doi.org/10.2320/matertrans1989.35.332.

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31

Ana, Kostov, Milosavljevic Aleksandra, and Stanojevic Simsic Zdenka. "Characterization of Copper-Based Shape Memory Alloy with Zinc and Aluminum." International Journal of Engineering Research & Science 4, no. 1 (2018): 36–43. https://doi.org/10.5281/zenodo.1187302.

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<em>Copper-based shape memory alloy with zinc and aluminum was manufactured, plastically deformed, heat treated and characterized in terms of physico-mechanical, structural and micro-structural investigation. Typical martensitic microstructure with twins is revealed by optical and electron microscopy. The presence of the martensite in the structure was further confirmed through X-ray diffraction. Toughness and hardness of the alloy are investigated too. Optimal properties are obtained for the condition of the alloy that was subjected to heat treatment according to the following scheme: anneali
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32

Shilykovskaya, D. О., D. Yu Kuimova, and А. М. Elokhov. "Metal ions extraction in the ammonium sulfate–oxyethylated nonylphenol (neonol AF 9-10)–water system in the presence of organic complexing agents." Žurnal neorganičeskoj himii 69, no. 5 (2024): 786–91. http://dx.doi.org/10.31857/s0044457x24050184.

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Using isothermal titration method and isothermal method of sections, phase equilibria in the ammonium sulfate–oxyethylated nonylphenol (neonol AF 9-10)–water at 25°C system were studied. Optimal extraction parameters (ratio neonol AF 9–10 : ammonium sulfate = 1 : 3, mass fraction of water 75.0 wt.%) were determined and the patterns of distribution of iron(III), copper(II), aluminum and indium ions in the system ammonium sulfate–oxyethylated nonylphenol (neonol AF 9-10)–water in the presence of acetylacetone and 1,2,3-benzotriazole were established . Conditions for the quantitative extraction o
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33

Wang, Y. "Removal of arsenic and metal ions from acidic effluents via the Fenton reaction method." Journal of the Southern African Institute of Mining and Metallurgy 123, no. 8 (2023): 415–21. http://dx.doi.org/10.17159/2411-9717/1863/2023.

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Arsenic-bearing acidic effluent from hydrometallurgical processes contains many harmful metal ions and must be appropriately treated before discharge. In the present study, arsenic, copper, zinc, aluminum, and magnesium were co-precipitated by means of the Fenton reaction. The precipitates obtained under different conditions were investigated to determine their stability. The results indicate that pH value and hydrogen peroxide (H2O2) dosage have significant effects on the removal of various elements. Arsenic, copper, zinc, and aluminum (but not magnesium) can be removed at pH 5-6 and anH2O2/A
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34

Akhmetova, Dana. "Anthropogenic impact on soil and vegetation in Turkistan region: Chemical composition and heavy metal contamination." Journal of the Geographical Institute Jovan Cvijic, SASA, no. 00 (2024): 13. http://dx.doi.org/10.2298/ijgi240426013a.

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The main purpose of this study is to analyze the anthropogenic impact on the soil and vegetation cover of the landscapes of the Turkistan region (southern part of Kazakhstan), and to investigate the chemical composition of elements and pollutants. The current state of landscapes with patterns of distribution of chemical elements and the influence of anthropogenic activity have been revealed. Quantitative indicators of the content of chemical elements (carbon, oxygen, sodium, magnesium, aluminum, silicon, potassium, calcium, titanium, iron, lead, arsenic, copper, zinc, nickel, cobalt, vanadium,
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35

Sun, Yingqi, Xinghua Han, and Zhongkui Zhao. "Direct coating copper–zinc–aluminum oxalate with H-ZSM-5 to fabricate a highly efficient capsule-structured bifunctional catalyst for dimethyl ether production from syngas." Catalysis Science & Technology 9, no. 14 (2019): 3763–70. http://dx.doi.org/10.1039/c9cy00980a.

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This work reports a facile strategy for preparing a highly efficient capsule bifunctional catalyst by direct coating copper–zinc–aluminum oxalate with H-ZSM-5, showing outstanding catalytic properties for dimethyl ether production from syngas.
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36

Tista, Si Putu Gede Gunawan, I. Gusti Ngurah Nitya Santhiarsa, Ketut Astawa, I. Gusti Ngurah Putu Tenaya, and Komang Metty Trisna Negara. "PEMBANGKITAN TEGANGAN MENGGUNAKAN KARBON AKTIF TEMPURUNG KELAPA DENGAN ELEKTROLIT AIR." Jurnal Rekayasa Mesin 15, no. 2 (2024): 741–55. http://dx.doi.org/10.21776/jrm.v15i2.1520.

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The generation of electrical energy from fossil fuels is currently running low, besides that it can cause global warming due to gas emissions such as carbon dioxide. Besides that, the development of small portable equipment such as watches, handphones, and cameras, requires batteries with small power. Therefore, environmentally friendly materials on a small scale are needed to generate electricity, one of which is coconut shell-activated carbon. The purpose of this research is to generate a voltage from a model using activated coconut shell carbon with a water-electrolyte. The model consists o
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37

Karlsson, S., P. Sandén, and B. Allard. "Environmental Impacts of an Old Mine Tailings Deposit — Metal Adsorption by Particulate Matter." Hydrology Research 18, no. 4-5 (1987): 313–24. http://dx.doi.org/10.2166/nh.1987.0023.

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The distribution of metals (aluminum, manganese, iron, copper, zinc, cadmium and lead) between suspended particles and solution phase has been studied by analysis of time series data in a stream receiving leachates from a mine tailings deposit. A precipitation of aluminum and iron takes place when the acidic effluents are neutralized by unpolluted groundwater, while the other dissolved elements never reach saturation. The particulate fraction is largely amorphous. A transfer of dissolved elements from the solution phase to the particle phase, increasing in the order zinc &amp;lt; cadmium &amp;
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38

Baltaci, Abdulkerim Kasim, Fusun Sunar, Rasim Mogulkoc, and Hatice Toy. "The Effect of Zinc Deficiency and Supplementation on Elements in the Kidney Tissue of Ovariectomized Rats: Histopathologic Changes." International Journal for Vitamin and Nutrition Research 87, no. 3-4 (2017): 131–38. http://dx.doi.org/10.1024/0300-9831/a000396.

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Abstract. The objective of the present study is to determine the effects of zinc deficiency in and zinc supplementation to ovariectomized rats on some elements in kidney tissue. The study included 40 Sprague-Dawley type adult female rats. The experimental animals were randomized into four groups with equal numbers as follows: Group 1: Control (10). Group 2: Ovariectomized control (10). Group 3: Ovariectomized + zinc supplemented (10). Group 4: Ovariectomized + zinc deficient (10). After the animals were decapitated at the end of the experiment, element levels were determined by Atomic Emission
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39

Shargaev, E. O., and I. N. Pashkov. "The research of interaction of zinc solders with aluminum alloys during friction application." Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta, no. 4 (2020): 58–66. http://dx.doi.org/10.18323/2073-5073-2020-4-58-66.

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Nowadays, due to the search for more efficient and steady processes of aluminum combination and the products that cannot be manufactured using flux, the issue of application of flux-free soldering methods for aluminum-based alloys is highly relevant. The lack of the description of the processes and mechanisms of flux-free soldering by the technique of friction of the solder on the aluminum surface makes it urgent to study and describe them in detail. To carry out the study, the authors produced zinc-based alloys and prepared solder rods using the hot pressing method. Using the technique of fri
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40

Amelkovich, Yuliya A., and Olga B. Nazarenko. "Production of Precursors for Ceramics Materials on the Base of Aluminum Nanopowders in Mixtures with Some Simple Substances." Advanced Materials Research 872 (December 2013): 70–73. http://dx.doi.org/10.4028/www.scientific.net/amr.872.70.

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Chemical activity parameters for aluminum nanopowder in mixtures with zinc, graphite, silicon, iron and copper powders are explored. The study of the phase content of combustion products shows that these mixtures can be used to produce precursors for ceramic materials.
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41

Balasundaram, R., V. K. Patel, S. D. Bhole, and D. L. Chen. "Effect of zinc interlayer on ultrasonic spot welded aluminum-to-copper joints." Materials Science and Engineering: A 607 (June 2014): 277–86. http://dx.doi.org/10.1016/j.msea.2014.03.135.

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42

Raghavan, V. "Al-Cu-Mg-Sc-Zn-Zr (Aluminum-Copper-Magnesium-Scandium-Zinc-Zirconium)." Journal of Phase Equilibria and Diffusion 28, no. 2 (2007): 226–27. http://dx.doi.org/10.1007/s11669-007-9037-6.

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43

Gusi, S., F. Trifiró, and A. Vaccari. "Kinetic study of the reduction of copper-zinc-aluminum mixed oxide catalysts." Reactivity of Solids 2, no. 1-2 (1986): 59–71. http://dx.doi.org/10.1016/0168-7336(86)80064-x.

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44

Kolesnikov, A. V., and E. I. Ageenko. "Comparative studies of the discharge of hydronium ions on zinc, copper and aluminum cathodes." Izvestiya Vuzov. Tsvetnaya Metallurgiya (Universities' Proceedings Non-Ferrous Metallurgy) 28, no. 6 (2022): 22–31. http://dx.doi.org/10.17073/0021-3438-2022-6-22-31.

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Electrochemical reduction of hydrogen (hydronium ion) was carried out on zinc, aluminum and copper cathodes from acidic aqueous solutions containing sulfuric acid (0.09, 0.18 and 0.36 mol/l) to study the effect of electrolyte acidity, the type of cathodes used and potential values on electrolysis indicators. The studies were carried out on the potentiostat using a three-electrode cell under conditions of intensive electrolyte stirring with a magnetic stirrer. At the initial stage, electrolysis was performed in the following modes: potentiodynamic measurements at a sweep rate of 1 mV/s in the p
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45

Park, Jaehwan. "The Role of Canceled Warrants in the LME Market." International Journal of Financial Studies 7, no. 1 (2019): 10. http://dx.doi.org/10.3390/ijfs7010010.

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This article visits the question of whether canceled warrants (CWs) have a positive effect on LME metal prices. To examine this question carefully, a regression model is applied. This paper finds a statistically significant positive link between CWs and LME metal prices, including aluminum, zinc, tin, and nickel. However, other metals such as copper and lead are not statistically significant. The second objective of the study is to identify the dynamic response of metal price returns for aluminum, zinc, tin, and nickel to an innovation in the CWs using VAR. It is found that the positive impact
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46

Berish, C. W., and H. L. Ragsdale. "Chronological sequence of element concentrations in wood of Carya spp. in the southern Appalachian Mountains." Canadian Journal of Forest Research 15, no. 3 (1985): 477–83. http://dx.doi.org/10.1139/x85-078.

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Tree-ring analyses of hickory (Carya spp.) from the long-term ecological research site, Coweeta Hydrologic Research Laboratory, revealed that concentrations (micrograms per gram) of lead, aluminum, and zinc are increasing, that concentrations of copper, cadmium, nickel, and manganese have remained generally constant since the 1880's, and that hickory annual radial growth increments are declining. Lead, aluminum, and zinc burdens (microgram per growth interval), unlike their respective concentrations, have remained generally constant during the 1900's. The interpretation of growth and burden da
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47

Lavrinenko, A. A., O. G. Lucinian, I. N. Kuznetsova, and V. G. Olennikov. "Obtaining copper concentrate during iron ore processing." Izvestiya. Non-Ferrous Metallurgy 1, no. 1 (2023): 5–15. http://dx.doi.org/10.17073/0021-3438-2023-1-5-15.

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The data on the complex processing of iron ore from one of the deposits of the Republic of Kazakhstan, which involves several operations of wet magnetic separation with re-grinding of raw products and their subsequent refining to produce a conditioned iron concentrate with 65–66 % iron containing 79–80 % Fe and 2.2–2.5 % Si, are presented. It was found that during the magnetic enrichment of the ore under study, the copper minerals concentrate in the magnetic separation tailings and the copper content in them increases from 0.093 to 0.2 %. A scheme and reagent system have been developed for the
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48

Marinho-Reis, Amélia P., Cristiana Costa, Fernando Rocha, et al. "Biogeochemistry of Household Dust Samples Collected from Private Homes of a Portuguese Industrial City." Geosciences 10, no. 10 (2020): 392. http://dx.doi.org/10.3390/geosciences10100392.

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The main objectives of the present study were to (i) investigate the effects of mineralogy and solid-phase distribution on element bioaccessibility and (ii) perform a risk assessment to calculate the risks to human health via the ingestion pathway. Multiple discriminant analysis showed that the dust chemistry discriminates between indoor and outdoor samples. The solid-phase distribution of the elements in indoor dust indicated that a large proportion of zinc, nickel, lead, copper, and cobalt is associated with an aluminum oxy-hydroxides component, formed by the weathering of aluminum silicates
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49

Sobri, Normidatul Salwa, Khisbullah Hudha, Zulkiffli Abd Kadir, Noor Hafizah Amer, and Ku Zarina Ku Ahmad. "THE EFFECTS OF ADDITIVE ON THE IMPACT ABSORPTION CAPABILITY OF MAGNETORHEOLOGICAL ELASTOMER." Jurnal Teknologi 85, no. 4 (2023): 17–25. http://dx.doi.org/10.11113/jurnalteknologi.v85.19092.

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Magnetorheological elastomer (MRE) is a smart material whose its damping and stiffness characteristics change when exposed to a magnetic field. MRE usually contains rubber and ferrous particles. Other materials such as additives, can improve physical properties of MRE during cyclic loading. However, limited research has been conducted into the effect of incorporating these additives on MRE performance when subjected to impact loading. Additives can change the MRE’s structure such as stiffness and enhance its damping properties, especially its impact absorption capabilities. This study focuses
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50

Akaratiwa, Somchai, and Tammanoon Udomman. "Steam Reforming of Methanol Over Cu/Al203/ZnO Catalysts." ASEAN Journal of Chemical Engineering 3, no. 1 (2003): 9. https://doi.org/10.22146/ajche.50854.

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In this research, steam reforming of methanol over Cu/Al2O3/ZnO catalysts was investigated. The catalysts were prepared by conventional co-precipitation and sequential precipitation methods. Especially, the sequential precipitation method were performed by varying the sequence of additions of copper, aluminum, and zinc nitrate solutions. The experimental results showed clearly that the preparation methods affected the performance of catalysts. The Cu/AI2O3/ZnO catalysts prepared by consecutively adding copper, aluminum, and zinc nitrate solutionsexhibited better performance. The effect of Al2O
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