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Journal articles on the topic 'Copper red'

Author: Grafiati

Published: 25 May 2024

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1

Batool, Madiha, Muhammad Zahid Qureshi, Farwa Hashmi, Nida Mehboob, and Walid M. Daoush. "Adsorption of Congo Red (Acid Red 28) Azodye on Biosynthesized Copper Oxide Nanoparticles." Asian Journal of Chemistry 31, no. 3 (2019): 707–13. http://dx.doi.org/10.14233/ajchem.2019.21752.

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A green synthesis of copper oxide nanoparticles and its removal efficiency of azodye were studied. Biosynthesis of stable copper oxide nanoparticles were preformed using Aloe barbadensis leaf extract as a size and shape-directing agent for preparing of spherical copper oxide nanoparticles by calcination at 400 °C. The leaf extract of Aloe barbadensis was prepared in deionized water. The produced copper particles were calcined at 400 °C to produce copper oxide nanoparticles. The characterization of copper oxide nanoparticles was performed by XRD, SEM, FTIR, UV spectroscopy. The XRD analysis sho

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2

Lu, Xi Zhao. "Laser Micro-Jet Processing on Red Copper." Advanced Materials Research 602-604 (December 2012): 2040–44. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.2040.

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Red copper is difficult to process with laser for its high reflection rate and high density. On the contrary, with the development of Modern Laser Micro-Jet processing, the new Laser Micro-jet with 30μm and 130μm are utilized to process new area like red copper plate etc., new Laser Micro-jet with 30μm nozzle is redesigned as well as working experiment on red copper is carried out. Red copper is machining with the Laser Micro-Jet The experiment shows the methods can improve the red copper‘s machining quality, on the contrary, the result of experiment shows the new laser processing methods can

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3

Zhu, Jian, Huiping Duan, Yimin Yang, et al. "Colouration mechanism of underglaze copper-red decoration porcelain (AD 13th–14th century), China." Journal of Synchrotron Radiation 21, no. 4 (2014): 751–55. http://dx.doi.org/10.1107/s1600577514009382.

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Underglaze copper-red decoration,i.e.the copper colourant used to paint diversified patterns on the surface of a body and then covered by transparent glaze and fired at high temperature in a reductive firing environment, is famous all over the world. However, the red colouration mechanism generated by underglaze copper remains unclear. In particular, the fact that the edges of the red patterns are orange has been ignored in previous research. Here, non-destructive analysis has been carried out on a precious fragment of early underglaze red porcelain using synchrotron radiation X-ray fluorescen

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4

Mathur, R., H. Falck, E. Belogub, et al. "Origins of Chalcocite Defined by Copper Isotope Values." Geofluids 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/5854829.

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The origin of chalcocite is explored through a comparison of the copper isotope values of this mineral from supergene enrichment, sedimentary copper/red bed, and high-temperature hypogene mineralization around the world. Data from the literature and the data presented here (n=361) reveal that chalcocite from high-temperature mineralization has the tightest cluster of values of δCu65=0±0.6 in comparison to sedimentary copper/red bed δCu65=-0.9±1.0 and supergene enrichment δCu65=+1.9±1.8. Although the errors of the means overlap, large portions of the data lie in different values, allowing for d

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5

Gou, Rui Jun, and Shu Hai Zhang. "The Bifurcate Fracture Analysis of Linear Red Copper Penetrator." Advanced Materials Research 189-193 (February 2011): 213–16. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.213.

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Red copper has been widely used in shaped charge liner because of its good ductility. Red copper penetrator is the Linear Explosively Formed Penetrator (LEFP) with some length and energy which has been produced when linear red copper shaped charge liner is overturned under the effect of detonation production. Compared with some ordinary jets sword, it has some characteristics such as the broad range of stand-off, big cratering and obvious rear effect and may meet with many operating requirements in different environment. It has been discovered that the bifurcate fracture phenomenon of red copp

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6

Eo, Hye-Jin, and Byung-Ha Lee. "Coloration Characteristics of Copper Red Glaze." Korean Journal of Materials Research 23, no. 7 (2013): 399–403. http://dx.doi.org/10.3740/mrsk.2013.23.7.399.

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7

Han, Bao Jun. "Investigation of Rare-Earth Salt Refiner on Purifying Effect of Impure Red Copper." Advanced Materials Research 898 (February 2014): 436–39. http://dx.doi.org/10.4028/www.scientific.net/amr.898.436.

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A method to fabricate a new kind rare earth salt refiner for purifying impure red copper was introduced in present paper, and the application of which on deoxidization, conductivity and mechanical properties of impure red copper were also inspected by composition analysis, Scanning Electron Microscope (SEM) and mechanical properties test technologies. The effect mechanism of the rare earth salt refiner on the performance of red copper was discussed in detail in this paper.

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8

Zhou, Qingchao, Chengsi Wang, and Andy-Hsitien Shen. "Application of High-Temperature Copper Diffusion in Surface Recoloring of Faceted Labradorites." Minerals 12, no. 8 (2022): 920. http://dx.doi.org/10.3390/min12080920.

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Owing to the high market values of natural sunstones in Oregon, a kind of artificially diffused red feldspar exhibited at the Tucson Exhibition at the beginning of this century, whose color origin is the same as that of natural sunstone (copper nanoparticles). However, the details of the artificial diffusion process are less disclosed, there is no systematic method to obtain such gemstones. In this paper, we developed the high-temperature copper diffusion process for the surface recoloring of faceted labradorites, which are partly buried in the diffusant. By optimizing the experimental paramet

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9

Xue, Wei, Pierre Kennepohl, and John N. R. Ruddick. "Reacted copper(II) concentrations in earlywood and latewood of micronized copper-treated Canadian softwood species." Holzforschung 69, no. 4 (2015): 509–12. http://dx.doi.org/10.1515/hf-2014-0128.

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Abstract Electron paramagnetic resonance was used in conjunction with X-ray fluorescence spectroscopy to quantify total copper and reacted copper retentions in MCQ and MCA treated Canadian red pine sapwood and western hemlock heartwood. Total copper retentions were distinctly different between earlywood and latewood of both softwood species examined. Earlywood of red pine sapwood had higher total copper content than the latewood, while western hemlock heartwood had higher total copper contents in latewood than earlywood. The reacted copper concentrations were similar in earlywood and latewood,

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10

Shirshnev, P. S., R. M. Eremina, I. V. Yatsyk, et al. "The Electron Spin Resonance (Esr) Spectra of Potassium-Alumina-Borate Glass Doped with Copper Ions." REVIEWS ON ADVANCED MATERIALS SCIENCE 57, no. 2 (2018): 212–14. http://dx.doi.org/10.1515/rams-2018-0066.

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Abstract We investigate electron spin resonance (ESR), absorption, and photoluminescence spectra of potassium-boron copper-containing glasses. In previous works it was found, that the considered glasses demonstrate a red shift of photoluminescence. In present work, we provide an evidence on the formation in glasses specific copper-containing structures that can be responsible for the red shift of photoluminescence “copper” band.

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11

Buntem, Radchada, Blythe McCarthy, and Chawalit Khaokhiew. "Morphological Studies on Microstructure of Thai Ancient Glass Beads." Key Engineering Materials 702 (July 2016): 8–12. http://dx.doi.org/10.4028/www.scientific.net/kem.702.8.

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Various ancient glass beads in prehistorical - historical period (around 2500-1200 BP) from the collection of the Banraiprachasawan local museum (A. Pisalee, Nakhon Sawan) were studied to determine elemental compositions and morphologies using electron probe microanalysis (EPMA) and scanning electron microscopy/energy dispersive x-ray analysis (SEM/EDX). The colors of the beads range from blue to red brown. From the EPMA data, all beads contain copper in the glass matrices. The SEM/EDX showed differences in the microstructures of the glass beads. The transparent blue, greenish blue and light g

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12

Liu, Peng, Jian Ping Jiang, and Bai Lian Sun. "Interface and Bonding Strength of Explosively Welded T2/DT4C Laminate." Advanced Materials Research 785-786 (September 2013): 1051–54. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.1051.

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T2 red copper plate and DT4C electrical pure iron plate were cladded by explosive welding. Microcosmic analysis and bonding strength of the bonding interface were also studied. Results indicate that the welded zone appears periodical wavy metallurgical interface and obvious element diffusion occurs in the interfacial zone. In addition, no separation happens after the bonding strength test and tension-shear test and the broken zone takes place in the T2 red copper part of the samples, indicating that the bonding strength of the welded interface can get no less than the strength of T2 red copper

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13

Xia, Xiang, Shi Kun Xie, and Li Ping Liao. "Weld Repairs of the Electroslag Casting Red Copper Crucible." Advanced Materials Research 1033-1034 (October 2014): 1296–99. http://dx.doi.org/10.4028/www.scientific.net/amr.1033-1034.1296.

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The paper analyses the manufacturability and difficulties in weld repairs of the electroslag casting red copper crucible with bent axle, work out the relevant measure. It is proved by experiment that large red copper product can be perfectly repairs by use suitable welding procedure.

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14

He, Wen, Yun Long Ai, Jia Yuan Ding, Li Liu, and Fei He. "Microwave Annealing of Cold Compression Deformation Red Copper." Advanced Materials Research 199-200 (February 2011): 1840–44. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.1840.

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Annealing treatment of cold compression deformation red copper was heated by microwave. The feasibility of microwave heating technology applied to heat treatment of metallic materials, and the effect of annealing process on microstructure were discussed. The results show that the phenomenon of arc discharge do not occur during the process of microwave heating red copper, which illustrates that microwave can be used as heat source for heat treatment of metallic materials. When annealing condition is 510°C for 30min, the grains of deformation red copper undergo a transition from fibrous grain to

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15

Liu, Xi, Yun-Zhi Yang, Chun-Hai Wang, and Kun-Lin Huang. "A Copper Cyanide Complex with Efficient Red Luminescence." Australian Journal of Chemistry 66, no. 8 (2013): 989. http://dx.doi.org/10.1071/ch13143.

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Gaseous diffusion of diethyl ether into the solvothermal reaction mixture of copper cyanide (CuCN) with 2,2′-bipyridine (bipy) in anhydrous acetonitrile leads to a copper cyanide complex Cu(CN)(bipy) (1) with a special helical chain structure. Solid-state luminescence experiments show that complex 1 can emit efficient red luminescence, and its possible emission mechanism was investigated in detail based on theoretical calculations. The results may be helpful for the design and synthesis of more efficient luminescent materials.

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16

Brun, N., L. Mazerolles, and M. Pernot. "Microstructure of opaque red glass containing copper." Journal of Materials Science Letters 10, no. 23 (1991): 1418–20. http://dx.doi.org/10.1007/bf00735696.

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17

Goins, B., W. T. Phillips, R. Klipper, and R. Blumhardt. "LABELING RED BLOOD CELLS WITH COPPER-67." Clinical Nuclear Medicine 18, no. 2 (1993): 173. http://dx.doi.org/10.1097/00003072-199302000-00034.

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18

Melnik, Milan, Luba Macaskova, and Clive E. Holloway. "Structural aspects of red copper(I) compounds." Coordination Chemistry Reviews 126, no. 1-2 (1993): 71–92. http://dx.doi.org/10.1016/0010-8545(93)85033-z.

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19

Rafique, Muhammad Asim, Adil Jamal, Zainab Ali, et al. "Biologically Synthesized Copper Nanoparticles Show Considerable Degradation of Reactive Red 81 Dye: An Eco-Friendly Sustainable Approach." BioMed Research International 2022 (July 16, 2022): 1–9. http://dx.doi.org/10.1155/2022/7537955.

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Diospyros kaki leaf extract was used in this study as a favorable basis for the synthesis of copper nanoparticles (Cu NPs). X-ray diffraction (XRD) and UV-visible spectroscopy approaches were used to characterize the biologically synthesized copper nanoparticles. The XRD analysis showed that copper nanoparticles were face-centered cubic structure. Various experimental levels like conc. of dye, concentration of Cu NPs, pH, reaction time, and temperature were optimized to decolorize reactive red 81 dye using the synthesized Cu NPs. Reactive red 81 dye was decolorized maximum using Cu NPs of 0.00

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20

Brass, T. J., G. J. Keever, C. H. Gilliam, and D. J. Eakes. "STYRENE-LINED AND COPPER-COATED POTS AFFECT MAPLE GROWTH." HortScience 29, no. 7 (1994): 730b—730. http://dx.doi.org/10.21273/hortsci.29.7.730b.

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Red maple cultivars 'October Glory' and `Northwood' were grown in 7 gallon containers to determine the influence of styrene lining and copper coating of containers on container medium temperature and growth of red maple cultivars. Copper coating effectively reduced circling of roots at the container wall-medium interface. Root control with copper was less effective on `October Glory' (a more vigorous cultivar) than on `Northwood'. Height, caliper, and root dry weight also were less for `Northwood'. In the absence of copper, surface-root coverage was greater in foam - lined containers than in c

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21

Benson, Jodi, and John Kelly. "EFFECT OF COPPER SULFATE FILTERS ON GROWTH OF BEDDING PLANTS." HortScience 25, no. 9 (1990): 1144a—1144. http://dx.doi.org/10.21273/hortsci.25.9.1144a.

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Height control is a major concern when growing bedding plants. Growth regulating chemicals are often applied to regulate height of bedding plant species. However, reductions in plant height have been observed when plants were grown under light with a high ratio of red to far red light. Light passing through clear double walled, acrylic panels filled with copper sulfate solution has a high red to far red ratio. This work examined the effect of growing tomatoes, peppers, pansies, petunias, geraniums, and impatiens under panels filled with 4, 8, and 16 percent copper sulfate solution. Plants were

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22

Noirot, Cécile, Laurent Cormier, Nadine Schibille, Nicolas Menguy, Nicolas Trcera, and Emiliano Fonda. "Comparative Investigation of Red and Orange Roman Tesserae: Role of Cu and Pb in Colour Formation." Heritage 5, no. 3 (2022): 2628–45. http://dx.doi.org/10.3390/heritage5030137.

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This study aims at the characterisation of red and orange glass tesserae from the 4th-century Roman villa of Noheda (Spain). Due to the limited number of analyses available for such ancient materials, many questions remain unanswered about the production processes in the Roman period. Six samples were chosen for their hue variations, including two samples showing banded patterns of red and orange. Differences in copper speciation were investigated by X-ray absorption spectroscopy and compared with colour and compositional variations obtained by EPMA. The shapes and sizes of colouring crystals

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23

Berry, Steven M., Erika L. Bladholm, Elise J. Mostad, and Audrey R. Schenewerk. "Incorporation of the red copper nitrosocyanin binding loop into blue copper azurin." JBIC Journal of Biological Inorganic Chemistry 16, no. 3 (2010): 473–80. http://dx.doi.org/10.1007/s00775-010-0746-7.

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24

Liang, Junyi, Lele Guo, Yin Ding, et al. "Genetically encoded red fluorescent copper(I) sensors for cellular copper(I) imaging." Biochemical and Biophysical Research Communications 443, no. 3 (2014): 894–98. http://dx.doi.org/10.1016/j.bbrc.2013.12.101.

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25

Vengust, G., T. Svara, M. Goc, and D. Zele. "Enzootic ataxia associated with copper deficiency in a farmed red deer: a case report." Veterinární Medicína 60, No. 9 (2016): 522–26. http://dx.doi.org/10.17221/8444-vetmed.

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26

Shen, Keyu. "EXPERIMENTAL STUDY ON PRESSURE SENSITIVE PROPERTIES OF COPPER CONTAMINATED SOIL SOLIDIFIED BY MODIFIED RED MUD." Journal of Environmental Engineering and Landscape Management 27, no. 2 (2019): 93–100. http://dx.doi.org/10.3846/jeelm.2019.9799.

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As a static method for testing pollution and strength of soil, the resistivity method has been used by many scholars, whereas few studies have been carried out on dynamic deformation monitoring by this method. To study the pressure sensitive properties of copper contaminated soils solidified by modified red mud, a series of unconfined compression tests were conducted. The compressive stress, strain and electrical resistivity in whole process were determined. Relationship between the resistivity and the parameters including stress, strain, red mud content, copper content, and curing age were an

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27

Li, Dan, Guannan Wang, Yongjin Peng, et al. "Development of ratiometric sensing and white light-harvesting materials based on all-copper nanoclusters." Nanoscale Advances 1, no. 3 (2019): 1086–95. http://dx.doi.org/10.1039/c8na00224j.

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28

Lê Anh, Mai, Alexander Wolff, Martin Kaiser, et al. "Mechanistic exploration of the copper(i) phosphide synthesis in phosphonium-based and phosphorus-free ionic liquids." Dalton Transactions 46, no. 43 (2017): 15004–11. http://dx.doi.org/10.1039/c7dt03083e.

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29

Wang, Xuan, Caicheng Long, Zixin Jiang, et al. "In situ synthesis of fluorescent copper nanoclusters for rapid detection of ascorbic acid in biological samples." Analytical Methods 11, no. 36 (2019): 4580–85. http://dx.doi.org/10.1039/c9ay01627a.

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Schematic presentation of the in situ synthesis of fluorescent copper nanoclusters for rapid determination of ascorbic acid is provided. After addition of ascorbic acid, copper(ii) is reduced to copper(0) and then clustered on dsDNA, thus producing red-emission CuNCs.

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30

Shen, Jiadong, Duosheng Li, Boming Xu, Xiaolei Xiong, Jiyuan Guan, and Youbin Gao. "Study on the Corrosion Characteristics of Grounding Materials in Acid Red Soil." Coatings 12, no. 2 (2022): 111. http://dx.doi.org/10.3390/coatings12020111.

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The corrosion of grounding materials seriously threatens the safe operation of the power system. The corrosion resistance of four typical grounding materials as carbon steel, galvanized steel, Zn–Al-coated steel, copper was studied in acid red soil. The results show that carbon steel, galvanized steel, Zn–Al-coated steel, copper exhibit different corrosion resistance behaviors, respectively. The corrosion rate of these grounding materials usually increases first and then slowly decreases. Pitting corrosion is the main corrosion feature of carbon steel. The corrosion rate of carbon steel is the

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31

Zhu, Xiayoue, Tiffany W. Victor, Ashwin Ambi, et al. "Copper accumulation and the effect of chelation treatment on cerebral amyloid angiopathy compared to parenchymal amyloid plaques." Metallomics 12, no. 4 (2020): 539–46. http://dx.doi.org/10.1039/c9mt00306a.

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32

Struve, Daniel K. "Effect of Copper-Treated Containers on Transplant Survival and Regrowth of Four Tree Species." Journal of Environmental Horticulture 11, no. 4 (1993): 196–99. http://dx.doi.org/10.24266/0738-2898-11.4.196.

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Abstract Northern red oak (Quercus rubra L.), scarlet oak (Q. coccinea Muenchh.), sweetgum (Liquidambar styraciflura L.), and ‘Autumn Flame’ red maple (Acer rubrum L.) liners were produced in copper-treated (100 gm Cu(OH)2/1 white latex paint) or untreated black plastic 3.8 1 containers (Lerio C-700) in 1989. In spring 1990, liners were transplanted into field plots. Half the liners produced in untreated containers were root pruned just before transplanting, half were not. Liners grown in copper-treated containers were not root pruned before transplanting. Survival percentage was high for all

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33

Tao, Y. L., C. H. Wang, H. Y. Xiang, G. R. Li, C. H. Li, and X. Liu. "A COPPER(I) COORDINATION COMPOUND WITH RED PHOTOLUMINESCENCE." Journal of Structural Chemistry 63, no. 1 (2022): 1–8. http://dx.doi.org/10.1134/s0022476622010012.

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34

Schreiber, Henry D., M. Andrew Stone, and Amy M. Swink. "Novel red–blue dichroic glass containing copper nanocrystals." Journal of Non-Crystalline Solids 352, no. 6-7 (2006): 534–38. http://dx.doi.org/10.1016/j.jnoncrysol.2005.11.041.

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35

Ding, Zhao Yong, Bao Min Sun, Yong Hong Guo, and Bing Hao Xu. "Effects of Sampling Substrate for Carbon Nanotubes Synthesis." Advanced Materials Research 129-131 (August 2010): 1341–45. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.1341.

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Pyramid shaped pyrolysis flame is a new method for carbon nanotubes synthesis. Oxy-acetylene flame outside the frustum of pyramid shaped reactor provides the necessary high temperature environment, while carbon monoxide is used as the source of carbon, iron pentacarbonyl (Fe(CO)5) as the source of catalyst precursor in reactor. In this experimental, substrate is the platform on which carbon nanotubes produced. The locations of 304 stainless steel and 201 stainless steel as substrates stayed in flame, 304 stainless steel pretreated or not, and different thickness of red copper and brass were st

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36

Koebke, Karl J., Leela Ruckthong, Jennifer L. Meagher, et al. "Clarifying the Copper Coordination Environment in a de Novo Designed Red Copper Protein." Inorganic Chemistry 57, no. 19 (2018): 12291–302. http://dx.doi.org/10.1021/acs.inorgchem.8b01989.

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Shang, Zhongyi, Zhiqing Zhang, and Qingchao Zhou. "Identification of Some Gem-Quality Red and Green Feldspars." Crystals 14, no. 5 (2024): 409. http://dx.doi.org/10.3390/cryst14050409.

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Sunstone is a member of the feldspar group. Natural sunstones from Oregon exhibit unique optical effects and hold significant market value. However, since 2008, there has been a persistent issue of diffused red feldspars masquerading as natural sunstones in the market, severely undermining consumer confidence in purchasing natural sunstones. Fluorescence characteristics under 305–335 nm ultraviolet excitation are considered an effective method for distinguishing copper-diffused red feldspars from natural sunstones. In this paper, through detailed analysis and testing of ten market-acquired red

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Abu-Amsha, Rima, Kevin D. Croft, Ian B. Puddey, Julie M. Proudfoot, and Lawrence J. Beilin. "Phenolic Content of Various Beverages Determines the Extent of Inhibition of Human Serum and Low-Density Lipoprotein Oxidation in Vitro: Identification and Mechanism of Action of Some Cinnamic Acid Derivatives from Red Wine." Clinical Science 91, no. 4 (1996): 449–58. http://dx.doi.org/10.1042/cs0910449.

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1. An antioxidant effect of phenolic substances in red wine to reduce oxidizability of low-density lipoprotein has been proposed as the basis for a relatively lower incidence of coronary disease in populations with high red wine intake. We have now investigated the possible antioxidant effects of various beverages, including red wines, white wines, beers and red grape juices (diluted 1:500), on metal ion-dependent (copper) and -independent (aqueous peroxyl radicals) oxidation of isolated human low-density lipoprotein. We also tested the effects of these beverages on copper-initiated oxidation

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Irawati, Wahyu, Vania A. C. Timotius, Ruben P. Adhiwijaya, and Eunike B. Marvella. "Karakterisasi Resistensi dan Dekolorisasi Berbagai Pewarna Oleh Bakteri Indigen Indonesia Escherichia coli Strain CN5." JURNAL BIOLOGI PAPUA 14, no. 2 (2022): 109–17. http://dx.doi.org/10.31957/jbp.2202.

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The development of the textile industry in Indonesia is increasing the amount of dye waste produced. Copper is often a component of dyes, both of which harm aquatic ecosystems because they cannot be degraded. These problems can be overcome by bioremediation using bacteria isolated from polluted waters, called indigenous bacteria. It is hoped that indigenous bacteria can degrade textile waste and reduce copper toxicity in waters. This study aims to characterize, test resistance, and test the decolorization of the Indonesian indigenous bacterial isolate CN5 to dye and copper. There are 12 kinds

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40

Messaoudi, Boulanouar, Tarik Attar, and Naceur Benhadria. "DFT Study of Some Copper Complexes and Their Detection Limit." Chemistry & Chemical Technology 16, no. 2 (2022): 185–94. http://dx.doi.org/10.23939/chcht16.02.185.

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A theoretical investigation was probed to shed light on the correlation between low detection limit (LOD) in AdSV technique and metal trace complexes stability energy. The study was conducted by means of DFT calculations of copper traces complexation by using three different organic molecules as chelating agents, such as: morin, red pyrogallol and thymolphtalexone. The quantum chemistry calculations were carried out at the B3LYP/6-31G(d) level implemented in Gaussian 09 program package. The results of the electrophilicity index ω indicate that all the studied molecules have a tendency to excha

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Zheng, Yan, Xue Jin Zhou, Yun Tao Gao, et al. "Ultrasonic-Assisted Oxalic Acid Extraction of Copper from Plateau Red Soil and Tessier Speciation Evaluation." Advanced Materials Research 726-731 (August 2013): 2368–71. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.2368.

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Abstract. The copper in plateau red soil was extracted by ultrasonic-assisted oxalic acid. Tessier fractional extraction method was used to evalute copper speciation. The result showed that the biggest extraction rate was 69%. Compared with oscillation extraction, the extraction rate of ultrasonic extraction was increased by 7.18% under the condition of 0.1 mol/L oxalic acid, 20:1 of liquid-solid ratio and 30 min of extraction time. Ultrasound could promote the oxalic acid extraction of copper from plateau red soil effectively, which could be attributed the success to the activation effect of

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42

Li, Gen, and Yong Lei. "The computational simulation of the reflection spectra of copper red glaze." AIP Advances 12, no. 9 (2022): 095319. http://dx.doi.org/10.1063/5.0095570.

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Owing to the limitation of traditional analytical methods, the coloration mechanism of copper red glaze has been disputed in the academic field for a long time, which mainly focuses on whether the color agent is metallic copper nanoparticles or cuprous oxide (Cu2O) nanoparticles. Based on Mie scattering theory, this work calculated the reflection spectra of nanoparticles uniformly dispersed in transparent glaze with different types, diameters, and volume fractions, then discussed the differences between the reflection spectra of metallic copper and cuprous oxide as scatterers, calculated the c

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Khan, Rohit, Mahbub Mayukh Rishad, Muhammad Abu Idris, Amsm Sharfuzzaman Rubel, and Quazi Tarikul Islam. "Acute Copper Sulfate Poisoning: a case report." Bangladesh Journal of Medicine 35, no. 2 (2024): 114–17. http://dx.doi.org/10.3329/bjm.v35i2.72627.

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Copper Sulfate known as a powerful oxidizing agent and it can lead to widespread cellular damage, depending upon the dose ingested. The systemic effects of poisoning are seen primarily on red blood cells, gastrointestinal system, kidneys and cardiovascular system. The ingestion of poison can be lethal in severe cases. We reported the case of a 16-year-old girl who presented to the emergency department after ingestion of an unknown amount of copper sulfate 3 days earlier. On admission to the hospital, she had upper abdominal pain, vomiting and red colored urine with a normal serum copper level.

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Singh, Varinder, Abdullah M. Abudayyeh, Matthew G. Robb, and Sally Brooker. "Mono-copper far more active than analogous di-copper complex for electrocatalytic hydrogen evolution." Dalton Transactions 51, no. 10 (2022): 4166–72. http://dx.doi.org/10.1039/d2dt00141a.

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Two metal ions are not better than one: new bimetallic 2 (blue), with no NH in the macrocyclic framework, is inactive, whereas literature monometallic 1 (red), with an NH group in the macrocyclic framework, is an active HER electrocatalyst.

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Pereira, H. Jessica, Oliver S. Hutter, G. Dinesha M. R. Dabera, Luke A. Rochford, and Ross A. Hatton. "Copper light-catching electrodes for organic photovoltaics." Sustainable Energy & Fuels 1, no. 4 (2017): 859–65. http://dx.doi.org/10.1039/c7se00077d.

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Liu, Xiong, Weiping Cai, and Huijuan Bi. "Optical Absorption of Copper Nanoparticles Dispersed within Pores of Monolithic Mesoporous Silica." Journal of Materials Research 17, no. 5 (2002): 1125–28. http://dx.doi.org/10.1557/jmr.2002.0166.

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Nano-sized copper particles are loaded into the pores of monolithic mesoporous silica by soaking and drying, followed by thermal reduction of copper nitrate [Cu(NO3)2]in a hydrogen atmosphere at 973 K for 90 min. It has been shown that copper nanoparticles are isolated from each other and highly uniformly dispersed inside the pores of silica. It is found that the surface plasmon resonance peak of the copper particles shows a significant red-shift with decreasing the particle size, which is in contrast to the corresponding fully embedded system. The peak decreases with exposure time to air and

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Belov, D. V., M. V. Maximov, S. N. Belyaev, T. I. Devyatkina, and G. A. Gevorgyan. "Effect of azo compounds on structure and mechanical properties of copper coating electrodeposited on oxidized aluminum alloys." Perspektivnye Materialy 6 (2021): 40–59. http://dx.doi.org/10.30791/1028-978x-2021-6-40-59.

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This article discusses a new method for producing copper electrolytic coatings with high performance properties applied to oxidized aluminum alloys. The purpose of this work is to reveal the effect of the azo compound additive, methyl red (MR), on the structure and physicomechanical properties of copper coatings deposited on oxidized aluminum. To achieve this goal, the following tasks were solved: the microstructure and adhesive properties of the copper coating formed on oxidized aluminum alloys were determined, and the physical and mechanical properties of the copper coating (microhardness, o

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K, APPAVU, and SREE RAMULU U.S. "DISTRIBUTION OF COPPER IN SOIL." Madras Agricultural Journal 78, March Augest (1991): 182–85. http://dx.doi.org/10.29321/maj.10.a01839.

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The distribution of total and available copper and their relationship to different soil properties were studied in twenty three soil profiles representing seven major soil series of Namakkal Taluk in Tamil Nadu. The total copper content varied from 12.6 to 105.5 ppm and increased with depth. Laterite soils contained more of total copper than black, alluvial and red soils and the total copper was closely related to available copper, clay, silt, calcium carbonate, fine and coarse sand. The available copper content varied from 0.20 to 1.13 ppm and the content showed an irregular distribution with

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de Cecco, Bianca, Franciéli Molossi, Lauren de Mello, Matheus Bianchi, and Saulo Pavarini. "Chronic copper poisoning in a sheep." Brazilian Journal of Veterinary Pathology 15, no. 2 (2022): 118–20. http://dx.doi.org/10.24070/bjvp.1983-0246.v15i2p118-120.

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Clinical History: A one-year-old female Texel sheep had anorexia and jaundice. After one day, the clinical condition progressed to lethargy, lateral recumbency, and death within hours. The sheep was part of a flock of 20 housed indoors and received an increasing amount of feed (specific for sheep) for the last two months. Gross Findings: The sheep was in excellent body condition. The carcass was discolored by marked icterus. In the subcutaneous tissue, there was multifocal petechiae and ecchymosis. The kidneys had a deep red-brown discoloration. The urinary bladder was distended and filled wit

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Odabasi, Ersin, Mustafa Turan, Ahmet Aydin, Cemal Akay, and Mustafa Kutlu. "Magnesium, Zinc, Copper, Manganese, and Selenium Levels in Postmenopausal Women with Osteoporosis. Can Magnesium Play a Key Role in Osteoporosis?" Annals of the Academy of Medicine, Singapore 37, no. 7 (2008): 564–67. http://dx.doi.org/10.47102/annals-acadmedsg.v37n7p564.

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Introduction: There has been a resurgence of interest in studies concerning the role of elements in the development and maintenance of the skeleton. The aim of the study was to assess the plasma and red blood concentrations of some elements in postmenopausal women with osteoporosis. Materials and Methods: Seventy-seven postmenopausal women with osteoporosis aged 61 years (median interquartile range, 7.5; range, 46 to 74) and 61 age- and BMI-matched healthy postmenopausal women aged 60 years (median interquartile range, 8.0; range, 44 to 76) were included in the study. Element concentrations in

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