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Articoli di riviste sul tema "Copper antimonite"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 10 febbraio 2022

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1

Focke, Walter W., Sfiso S. Mkhize, Rowan Storey, Olinto Del Fabbro e Elmar Muller. "FACILE SYNTHESIS OF COPPER ANTIMONITE". Chemical Engineering Communications 201, n. 2 (6 novembre 2013): 153–59. http://dx.doi.org/10.1080/00986445.2012.762629.

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2

Farias, Pedro, Christophe Espírito Santo, Rita Branco, Romeu Francisco, Susana Santos, Lars Hansen, Soren Sorensen e Paula V. Morais. "Natural Hot Spots for Gain of Multiple Resistances: Arsenic and Antibiotic Resistances in Heterotrophic, Aerobic Bacteria from Marine Hydrothermal Vent Fields". Applied and Environmental Microbiology 81, n. 7 (30 gennaio 2015): 2534–43. http://dx.doi.org/10.1128/aem.03240-14.

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ABSTRACTMicroorganisms are responsible for multiple antibiotic resistances that have been associated with resistance/tolerance to heavy metals, with consequences to public health. Many genes conferring these resistances are located on mobile genetic elements, easily exchanged among phylogenetically distant bacteria. The objective of the present work was to isolate arsenic-, antimonite-, and antibiotic-resistant strains and to determine the existence of plasmids harboring antibiotic/arsenic/antimonite resistance traits in phenotypically resistant strains, in a nonanthropogenically impacted environment. The hydrothermal Lucky Strike field in the Azores archipelago (North Atlantic, between 11°N and 38°N), at the Mid-Atlantic Ridge, protected under the OSPAR Convention, was sampled as a metal-rich pristine environment. A total of 35 strains from 8 different species were isolated in the presence of arsenate, arsenite, and antimonite. ACR3 andarsBgenes were amplified from the sediment's total DNA, and 4 isolates also carried ACR3 genes. Phenotypic multiple resistances were found in all strains, and 7 strains had recoverable plasmids. Purified plasmids were sequenced by Illumina and assembled by EDENA V3, and contig annotation was performed using the “Rapid Annotation using the Subsystems Technology” server. Determinants of resistance to copper, zinc, cadmium, cobalt, and chromium as well as to the antibiotics β-lactams and fluoroquinolones were found in the 3 sequenced plasmids. Genes coding for heavy metal resistance and antibiotic resistance in the same mobile element were found, suggesting the possibility of horizontal gene transfer and distribution of theses resistances in the bacterial population.
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Liu, Hong, Chao Qin, Yong-Ge Wei, Lin Xu, Guang-Gang Gao, Feng-Yan Li e Xiao-Shu Qu. "Copper-Complex-Linked Polytungsto-Bismuthate (-Antimonite) Chain Containing Sandwich Cu(II) Ions Partially Modified with Imidazole Ligand". Inorganic Chemistry 47, n. 10 (maggio 2008): 4166–72. http://dx.doi.org/10.1021/ic7022264.

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Askarova, Gulzhan, Mels Shautenov e Kulzhamal Nogaeva. "Flotation enrichment of resistant gold ores". E3S Web of Conferences 168 (2020): 00005. http://dx.doi.org/10.1051/e3sconf/202016800005.

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Ores of the Vasilkovsky deposit include arsenopyrite, pyrite, pyrrhotite, marcasite, gold, chalcopyrite, sphalerite, galena, faded ore (tennantite)S, bismuthine, native bismuth, lellingite, molybdenite, cubanite, bornite, antimonite, relict minerals, magnetite, apatite and apatite chromite, sericite, chlorite, potassium feldspar, tourmaline), quartz, carbonates (siderite, ankerite, calcite), fluorite, barite. Arsenopyrite is the main ore mineral. It contains the bulk of gold, as well as impurities - copper, cobalt, nickel, bismuth, zirconium, titanium, lead, zinc, antimony, silver, molybdenum. Bismuth and its minerals are widespread, they are constantly associated with arsenopyrite, forming intergrowths with native gold, less often with chalcopyrite and faded ore. Native gold is distributed very unevenly, forms the finest precipitates ranging in size from tenths of a micron to 0.063 mm, grows together with quartz, arsenopyrite, pyrite and bismuth minerals. Rich ores were formed by combining bismuthcontaining associations with arsenopyrite. The role of gold in arsenopyrite increases with depth. Ores are of the gold-quartz-sulfide type. Quartz in ore up to 90 %, sulfides from 3 to 5 %. The content of harmful impurities (arsenic) reaches 2 % or more. Ores are refractory, require special technology for the beneficiation and extraction of gold.
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Olmi, Filippo, Alessandrο Santucci e Renza Trosti-Ferroni. "Sabelliite, a new copper-zinc arsenate-antimonate mineral from Sardinia, Italy". European Journal of Mineralogy 7, n. 6 (27 dicembre 1995): 1325–30. http://dx.doi.org/10.1127/ejm/7/6/1325.

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6

Singh, Satyendra, Archana Singh, Ajendra Singh e Poonam Tandon. "An efficient room-temperature liquefied petroleum gas sensor based on trirutile copper antimonate nano-polygons". New Journal of Chemistry 44, n. 28 (2020): 11949–58. http://dx.doi.org/10.1039/d0nj02528c.

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7

Poirier, Gaël, Michel Poulain e Marcel Poulain. "Copper and lead halogeno-antimoniate glasses". Journal of Non-Crystalline Solids 284, n. 1-3 (maggio 2001): 117–22. http://dx.doi.org/10.1016/s0022-3093(01)00389-1.

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8

Xue-Wen, Wang, Chen Qi-Yuan, Yin Zhou-Lan e Xiao Lian-Sheng. "Identification of arsenato antimonates in copper anode slimes". Hydrometallurgy 84, n. 3-4 (novembre 2006): 211–17. http://dx.doi.org/10.1016/j.hydromet.2006.05.013.

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9

Font, J. M., e R. G. Reddy. "Modelling of antimonate capacity in copper and nickel smelting slags". Mineral Processing and Extractive Metallurgy 114, n. 3 (settembre 2005): 160–64. http://dx.doi.org/10.1179/037195505x63349.

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10

Jackson, Everett D., e Amy L. Prieto. "Copper Antimonide Nanowire Array Lithium Ion Anodes Stabilized by Electrolyte Additives". ACS Applied Materials & Interfaces 8, n. 44 (31 ottobre 2016): 30379–86. http://dx.doi.org/10.1021/acsami.6b08033.

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11

Wang, Xingming, Xuewen Wang, Biao Liu, Mingyu Wang, Huaguang Wang, Xuehui Liu e Shengfan Zhou. "Promotion of copper electrolyte self-purification with antimonic oxides". Hydrometallurgy 175 (gennaio 2018): 28–34. http://dx.doi.org/10.1016/j.hydromet.2017.10.028.

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12

Olivo, Gema Ribeiro, e Michel Gauthier. "Palladium minerals from the Cauê iron mine, Itabira District, Minas Gerais, Brazil". Mineralogical Magazine 59, n. 396 (settembre 1995): 455–63. http://dx.doi.org/10.1180/minmag.1995.059.396.07.

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AbstractPalladium-bearing minerals from the Cauê iron mine, Itabira District, Minas Gerais, Brazil, are found in gold-rich jacutinga, a hydrothermally-altered Lake Superior-type carbonate-bearing oxide facies iron-formation. Palladium occurs as: native palladium with trace contents of Au, Fe and Cu; palladseite ((Pd,Cu,Hg)17Se15), which was found in the core of a grain of palladium; palladium–copper oxide ((Pd,Cu)O); and arsenopalladinite (Pd8(As,Sb)3), with inclusions of palladium–copper oxide. The palladium and palladium–copper oxide grains are coated with films of gold and commonly do not exceed 100 µm in width. These palladium minerals occur in hematite bands and in boudinaged bands of quartz and white phyllosilicate parallel to the S1 mylonitic foliation. Palladium-copper oxide also occurs as inclusions in gold grains which are strongly to weakly stretched parallel to S1.Palladium mineralization is interpreted as synchronous with intense D1 shearing and contemporaneous with the peak of thermal metamorphism. At high oxygen fugacities and high temperatures (up to 600°C), Pd may have been transported as chloride complexes and deposited following changes in pH caused by mineralizing fluids reacting with jacutinga. Deposition may also have been prompted by the formation of insoluble selenide and arsenide–antimonide minerals and by the dilution of C1 concentrations in the mineralizing fluid. Textural studies, and the zonation observed in palladium and other hydrothermal minerals, suggest that oscillations in the physico-chemical conditions of hydrothermal fluids occurred during the mineralizing event.
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13

Mosby, James M., Derek C. Johnson e Amy L. Prieto. "Evidence of Induced Underpotential Deposition of Crystalline Copper Antimonide via Instantaneous Nucleation". Journal of The Electrochemical Society 157, n. 6 (2010): E99. http://dx.doi.org/10.1149/1.3392292.

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14

Blair, Claude, John Blair e R. Brownsword. "An Oxford Brasiers' Dispute of the 1390s: Evidence for Brass-Making in Medieval England". Antiquaries Journal 66, n. 1 (marzo 1986): 82–90. http://dx.doi.org/10.1017/s0003581500084493.

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A contract of 1392 between two Oxford brasiers, with an account of the ensuing dispute, provides important evidence for the organization of the medieval brasier's craft andfor technical aspects of his trade. One brasier employed another to make pots, bells and fawtys (probably faucets) for a flat payment by weight. The master-brasier provided the raw materials, comprising scrap brass on the one hand, and graycober (perhaps antimonial copper) and stelebake (probably zinc-bearing calamine ore so called from the place Stolberg) on the other. This, with newly discovered references to the importation of calamys and calamin in 1384, provides the first evidence yet found for the making of brass in England from its raw materials.
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15

Costa, Mafalda, Ana Margarida Arruda, Rui Barbosa, Pedro Barrulas, Peter Vandenabeele e José Mirão. "A Micro-Analytical Study of the Scarabs of the Necropolis of Vinha das Caliças (Portugal)". Microscopy and Microanalysis 25, n. 1 (31 gennaio 2019): 214–20. http://dx.doi.org/10.1017/s143192761801560x.

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AbstractFive scarabs and one scaraboid found in Vinha das Caliças 4 (Beja, Portugal) were analyzed using a micro-analytical methodology in order to determine their mineralogical and chemical composition. Microstructural characterization and chemical analysis revealed that all were composed of a white body of crushed feldspathic sand covered by a lead-rich, alkaline-depleted silicate blue-green glaze showing evident signs of glass deterioration. Variable pressure scanning electron microscopy with X-ray energy dispersive spectrometry, handheld X-ray fluorescence spectroscopy, and micro X-ray diffraction results show that blue-green color of the glaze was produced by using copper ions (Cu2+) in conjunction with the lead antimonate bindheimite, a yellow-colored opacifier. The introduction of small amounts of tin in the structure of bindheimite enabled the production of a ternary Pb–Sb–Sn oxide. Tin, which was most likely added with the copper source (bronze scrapings), is known to facilitate the crystallization of bindheimite. The results are consistent with the five scarabs and one scaraboid being manufactured in Egypt. This study, the first archeometric study of scarabs found in the Iberian peninsula, has greatly contributed to the understanding of the influence of the Eastern and Central Mediterranean world in the Southwestern Iberia during the first millennium B.C.
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16

Owens-Baird, B., S. Lee e K. Kovnir. "Two-dimensional metal NaCu6.3Sb3and solid-state transformations of sodium copper antimonides". Dalton Transactions 46, n. 37 (2017): 12438–45. http://dx.doi.org/10.1039/c7dt02329d.

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Synthesis, crystal structure, and transport properties of a novel two-dimensional metal, NaCu6.3Sb3, are reported together with the solid-state transformations observed within the Na–Cu–Sb system.
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17

Niu, Tianchao, Qingling Meng, Dechun Zhou, Nan Si, Shuwei Zhai, Xiamin Hao, Miao Zhou e Harald Fuchs. "Large‐Scale Synthesis of Strain‐Tunable Semiconducting Antimonene on Copper Oxide". Advanced Materials 32, n. 4 (11 dicembre 2019): 1906873. http://dx.doi.org/10.1002/adma.201906873.

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18

Tzankova, Nikoleta, e Philip Mihaylov. "Chemical characterization of glass beads from the necropolis of DrenDelyan (6th–4th century BC), Southwest Bulgaria". Geologica Balcanica 48, n. 2 (agosto 2019): 31–50. http://dx.doi.org/10.52321/geolbalc.48.2.31.

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The glass beads from the Dren-Delyan necropolis are found in burial complexes dated as from the end of the 6th century BC until the first half of the 4th century BC. The purpose of this study is to obtain data on the chemical composition of the glass and the technology of its production. LA-ICP-MS and SEM-EDS analyses were conducted. The analysed glass beads are classified as a low-magnesium type (LMG), and only one of the samples is determined as high-magnesium glass (HMG). The yellow colour of the glass is due to crystals of lead antimonate incorporated into the glass matrix. The green colour of the beads is a result of interaction of added copper and lead in the glass mixture, in presence of iron and chromium. Dark blue samples are coloured by additives with cobalt, copper and lower iron content. Light blue colouration of opaque glass beads is due to high copper content, along with the presence of iron. The colouring agent of a transparent light blue bead is FeO in amount up to 0.25 wt%. The brown colour is associated with high iron content. Two different opacifiers were used for the production of opaque glass beads – antimony and tin, either individually or together. The decolourising agent is antimony without the involvement of manganese. Based on the results of the studied glass beads, we assume at least four types of raw material mixtures for their production. Comparison of the obtained results and published data about similar ancient glass findings was made.
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19

Zhu, Min, WenJie Tan, Zhen Wu, Xu-Tang Tao, Baibiao Huang e Sheng-Qing Xia. "Sr4Cu25.37(18)Sb12 and Eu4Cu26.06(13)Sb12: Copper-Rich Antimonide Intermetallics with Cage Structure". Crystal Growth & Design 18, n. 3 (27 gennaio 2018): 1722–29. http://dx.doi.org/10.1021/acs.cgd.7b01645.

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20

Aly, Hisham M., Gehan S. El-Din e Ahmed A. Taha. "EQUILIBRIA AND KINETICS OF COBALT, NICKEL, AND COPPER ION EXCHANGE ON TITANIUM(IV) ANTIMONATE". Solvent Extraction and Ion Exchange 19, n. 2 (31 marzo 2001): 345–56. http://dx.doi.org/10.1081/sei-100102700.

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21

Kuleshevich, L. V. "Noble-metal associations related to Paleoproterozoic basic-hyperbasic magmatism in the Lapland-Onega province of Karelia". Vestnik of Geosciences 9 (2020): 14–18. http://dx.doi.org/10.19110/geov.2020.9.3.

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Topomineralogical studies are part of mineralogenic research conducted in the Paleoproterozoic Lapland-Onega rift-related structure in Karelia. These studies are important because of the location of promising areas and the study of deposits associated with basic-hyperbasic magmatism in Paleoproterozoic rift-related structures (chromite, titanomagnetite and nickel ores with PGE and gold). The aim of mineralogenic studies is to better understand major ore and noble-metal mineral associations by microprobe and ICP-MS-analyses. It was found that chromite ores are accompanied by high-temperature associations of platinoids — arsenides, sulfo-arsenides Pt, Rh, Ir and bismutotellurides Pt (with Pd), and sulfide Cu-Ni ores — mainly Pt-Pd bismutotellurides and tellurides. Titanomagnetite ores with low-sulfide copper mineralization contain stibio-sulfoarsenides, antimonides, stannides, and more rarely sulfides of Pd, Pd-Pt, and silver-containing gold.
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22

Abou-Mesalam, M. M. "Sorption kinetics of copper, zinc, cadmium and nickel ions on synthesized silico-antimonate ion exchanger". Colloids and Surfaces A: Physicochemical and Engineering Aspects 225, n. 1-3 (settembre 2003): 85–94. http://dx.doi.org/10.1016/s0927-7757(03)00191-2.

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23

Xiao, Fa-xin, Jian-wei Mao, Dao Cao, Xiao-ni Shen e Feng-zhang Ren. "Formation of antimonate in co-precipitation reaction of As, Sb and Bi in copper electrolytes". Minerals Engineering 35 (agosto 2012): 9–15. http://dx.doi.org/10.1016/j.mineng.2012.05.001.

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24

Ali, Shoaib, Christopher A. Muryn, Floriana Tuna e Richard E. P. Winpenny. "Synthesis and structural and magnetic characterisation of copper(ii) complexes of mixed phosphonate-antimonate ligands". Dalton Trans. 39, n. 1 (2010): 124–31. http://dx.doi.org/10.1039/b913467k.

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Balasubramaniam, M., e S. Balakumar. "Ultrasonication-assisted fabrication of hierarchical architectures of copper oxide/zinc antimonate nanocomposites based supercapacitor electrode materials". Ultrasonics Sonochemistry 56 (settembre 2019): 337–49. http://dx.doi.org/10.1016/j.ultsonch.2019.04.021.

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26

Smirnova, O. A., V. B. Nalbandyan, A. A. Petrenko e M. Avdeev. "Subsolidus phase relations in Na2O–CuO–Sb2On system and crystal structure of new sodium copper antimonate Na3Cu2SbO6". Journal of Solid State Chemistry 178, n. 4 (aprile 2005): 1165–70. http://dx.doi.org/10.1016/j.jssc.2005.02.002.

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27

Fiorenza, Elia, Natalia Rovella, Maria D’Andrea, Marianna Musella, Fabrizio Sudano, Armando Taliano Grasso e Donatella Barca. "Vitreous Tesserae from the Four Seasons Mosaic of the S. Aloe Quarter in Vibo Valentia–Calabria, Italy: A Chemical Characterization". Minerals 10, n. 8 (25 luglio 2020): 658. http://dx.doi.org/10.3390/min10080658.

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Abstract (sommario):
This work reports the results of the archaeometrical investigation performed on twenty glass tesserae collected in 2018, during the restoration of the Four Seasons mosaic, which dates between the second and the third century AD, in the archaeological area of the S. Aloe quarter in Vibo Valentia (Calabria, Italy). The coloured glass tesserae were analysed through a micro-analytical approach using an Electron Probe Micro Analyser with Wavelength-Dispersive Spectroscopy (EPMA-WDS) and Laser Ablation with Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). The aims of the study were (1) the determination of the chemical composition and the technology of glass mosaic tesserae production; (2) the individuation of colouring and opacifying agents used for the production of the glass tesserae. The glasses show the typical soda–lime–silica composition. EPMA-WDS results prove the use of Sn–Pb antimonates to create yellow glass, and of cuprite to obtain the red colour. Copper and cobalt were employed in both green and blue glasses to produce different shades of colour (grey, tints of green, dark and light blue).
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CHAGAS, Ana Flávia da Silva, Marina PORCHIA, Thaís Pinto NASCIMENTO, Carolina Nunes Souza CORREA, Anny Maíza Vargas BRASIL e Antonia Maria Ramos FRANCO. "In vitro and in vivo activity of a hypotoxic copper(I) complex against dermotropic Leishmania species". Acta Amazonica 51, n. 3 (settembre 2021): 260–69. http://dx.doi.org/10.1590/1809-4392202100920.

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ABSTRACT Cutaneous leishmaniasis is a disease caused by protozoa of the genus Leishmania and, currently, the treatment of first choice is meglumine antimoniate. However, due to its limited effectiveness and high toxicity, it is necessary to seek new active principles for leishmaniasis treatment. Metal complexes are gaining importance due to their effectiveness and low toxicity. In this context, the present study aimed to evaluate the in vitro and in vivo antileishmanial activity of the hypotoxic copper(I) complex [HB(pz)3]Cu(PCN). Four dermotropic species of Leishmania were tested with the metal complex and its effectiveness was determined through parasitic viability and infectivity rate, and cytotoxicity was determined using a redox dye (resazurin). For the in vivo tests, hamsters were infected and the lesions treated with a formulated ointment containing the complex, the effectiveness of which was assessed by measuring the diameter of the inoculum/snout location and determining the parasitic load. The results demonstrated moderate toxicity in murine macrophages and human monocytes and better efficacy in Leishmania (V.) braziliensis when compared to the other species tested, with a 50% reduction in the viability of promastigote and amastigote forms (in vitro). General data from daily topical treatment for up to 30 days showed low efficacy for reducing lesions, and no clinical and parasitological cure was observed in the experimental animals. Thus, the [HB(pz)3]Cu(PCN) complex proved to be promising in in vitro studies against L. (V.) braziliensis, and should be further tested in new formulations and new experimental treatment schemes.
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Albalawi, Aishah E., Sobhy Abdel-Shafy, Amal Khudair Khalaf, Abdullah D. Alanazi, Parastoo Baharvand, Katrin Ebrahimi e Hossein Mahmoudvand. "Therapeutic Potential of Green Synthesized Copper Nanoparticles Alone or Combined with Meglumine Antimoniate (Glucantime®) in Cutaneous Leishmaniasis". Nanomaterials 11, n. 4 (31 marzo 2021): 891. http://dx.doi.org/10.3390/nano11040891.

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Background: In recent years, the focus on nanotechnological methods in medicine, especially in the treatment of microbial infections, has increased rapidly. Aim: The present study aims to evaluate in vitro and in vivo antileishmanial effects of copper nanoparticles (CuNPs) green synthesized by Capparis spinosa fruit extract alone and combined with meglumine antimoniate (MA). Methods: CuNPs were green synthesized by C. spinosa methanolic extract. The in vitro antileishmanial activity of CuNPs (10–200 µg/mL) or MA alone (10–200 µg/mL), and various concentrations of MA (10–200 μg/mL) along with 20 μg/mL of CuNPs, was assessed against the Leishmania major (MRHO/IR/75/ER) amastigote forms and, then tested on cutaneous leishmaniasis induced in male BALB/c mice by L. major. Moreover, infectivity rate, nitric oxide (NO) production, and cytotoxic effects of CuNPs on J774-A1 cells were evaluated. Results: Scanning electron microscopy showed that the particle size of CuNPs was 17 to 41 nm. The results demonstrated that CuNPs, especially combined with MA, significantly (p < 0.001) inhibited the growth rate of L. major amastigotes and triggered the production of NO (p < 0.05) in a dose-dependent manner. CuNPs also had no significant cytotoxicity in J774 cells. The mean number of parasites was significantly (p < 0.05) reduced in the infected mice treated with CuNPs, especially combined with MA in a dose-dependent response. The mean diameter of the lesions decreased by 43 and 58 mm after the treatment with concentrations of 100 and 200 mg/mL of CuNPs, respectively. Conclusion: The findings of the present study demonstrated the high potency and synergistic effect of CuNPs alone and combined with MA in inhibiting the growth of amastigote forms of L. major, as well as recovery and improving cutaneous leishmaniasis (CL) induced by L. major in BALB/c mice. Additionally, supplementary studies, especially in clinical settings, are required.
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Brylak, Markus, e Wolfgang Jeitschko. "U3TiSb5, U3VSb5, U3CrSb5, and U3MnSb5 with "Anti"-Hf5Sn3Cu Type Structure". Zeitschrift für Naturforschung B 49, n. 6 (1 giugno 1994): 747–52. http://dx.doi.org/10.1515/znb-1994-0605.

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The title compounds have been prepared from the elemental components by arc-melting and subsequent annealing. Single crystals of U3TiSb5 and U3MnSb5 were obtained from a tin flux and their structures were determined from single-crystal X-ray data: P63/mcm, Z = 2; a = 913.9(2), c = 611.2(1) pm, R = 0.011 (233 structure factors, 14 variables) for U3TiSb5 and a = 916.8(2), c = 613.2(1) pm, R = 0.015 (427 structure factors, 14 variables) for U3MnSb5. The lattice constants of the isotypic compounds are: a = 908.2(2), c = 608.3(2) pm for U3VSb5 and a = 911.0(1), c = 611.5(1) pm for U3CrSb5. The structure of these antimonides may be regarded as an “anti”-type structure of Hf5Sn3Cu with the antimony atoms on the hafnium sites, while the positions of the uranium and transition metal atoms correspond to the positions of the tin and copper atoms. A comparison of the interatomic distances of U3TiSb5 with those of U3Sb4, USb2, and a-antimony suggests oxidation numbers according to (U+III)3Ti+IV(Sb1-III)3(Sb2-II)2, where the Sb2 atoms form weakly bonded chains
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Barca, Donatella, Elia Fiorenza, Maria D’Andrea, Emilia Le Pera, Marianna Musella, Fabrizio Sudano e Armando Taliano Grasso. "Chemical and Petrographic Characterization of Stone and Glass Tesserae in the Nereid and Geometric Mosaics from the S. Aloe Quarter in Vibo Valentia–Calabria, Italy". Minerals 9, n. 12 (26 novembre 2019): 729. http://dx.doi.org/10.3390/min9120729.

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Vibo Valentia’s S. Aloe quarter is an archaeological area which has three beautiful mosaic floors, dated between the centuries I BC and V AD. This work reports the results obtained on 22 glass and stone tesserae collected from the Nereid and Geometric mosaics during a recent restoration of the site. The analyses were carried out through a multi-analytical approach. The petrographic study of the stone tesserae was carried out using polarizing optical microscopy while the geochemical one was conducted using two micro-analytical techniques: the electron probe micro-analyzer with energy-dispersive X-ray spectrometry and a combination of laser ablation with inductively coupled plasma mass spectrometry for determining the major, minor, and trace element concentrations. The research highlights the use of different kinds of stones such as marble, volcanic, and sedimentary rocks. The glasses show the typical soda–lime–silica composition indicating the use of natron as a flux. The trace element concentrations prove the use of Pb-antimonates to create yellow glass. The bronze scrap was used to obtain the green color, while cobalt and copper were used to obtain different gradations of blue. These results confirm the high technological level reached by glassmakers in the Imperial Age, thus highlighting the importance of the S. Aloe archeological site.
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32

Jackson, Everett D., James M. Mosby e Amy L. Prieto. "Evaluation of the Electrochemical Properties of Crystalline Copper Antimonide Thin Film Anodes for Lithium Ion Batteries Produced by Single Step Electrodeposition". Electrochimica Acta 214 (ottobre 2016): 253–64. http://dx.doi.org/10.1016/j.electacta.2016.07.126.

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33

Cipriano, Patrícia, Ana Cláudia Miranda, Isabel Antunes e Kamal Mansinho. "Leishmaniose Visceral em Doentes com Infeção VIH: O Desafio da Recaída e Falência Terapêutica". Acta Médica Portuguesa 30, n. 6 (30 giugno 2017): 443. http://dx.doi.org/10.20344/amp.8291.

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Introduction: Visceral leishmaniasis is an endemic disseminated infection, considered to be the third most frequent opportunistic parasitic infection in Europe. It is especially prevalent in patients co-infected with human immunodeficiency virus, in whom it poses a great therapeutic challenge due to increased risk of relapse. The goal of this study is to characterize a population of co-infected patients, as well as the efficiency of the adopted treatment strategies.Material and Methods: Retrospective study with a sample composed of all patients with visceral leishmaniasis and human immunodeficiency virus admitted in an Infectious Diseases ward over a period of 10 years.Results: Of the 23 enrolled patients, two were female (8.7%). The mean TCD4+ cell count was 104.4 cells/uL (± 120.3cells/uL), only two patients had undetectable viral load (< 20 copies/mL) and 16 (69.6%) were not under antiretroviral therapy at the time of diagnosis. Treatment-wise, liposomal amphotericin B was used in 18 patients, meglumine antimoniate in four and miltefosine in one. Fourteen (60.9%) were adherent to secondary prophylaxis protocol. A relapse rate of 26.1% was observed (six patients).Discussion: Co-infection is responsible for higher treatment failure rates and more relapses. TCD4+ cell count is the main predictive factor of relapse, and strict adherence to chemoprophylaxis protocols unequivocally results in a reduction of relapse rate. Combined treatment strategies using liposomal amphotericin B and miltefosine yield fewer therapeutic failures than the classic approach.Conclusion: We therefore conclude that alternative, combined therapeutic protocols seem to be a viable solution for these patients.
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Smirnova, O. A., V. B. Nalbandyan, A. A. Petrenko e M. Avdeev. "Corrigendum to “Subsolidus phase relations in Na2O–CuO–Sb2O system and crystal structure of new sodium copper antimonate Na3Cu2SbO6” [J. Solid State Chem. 178 (2005) 1165–1170]". Journal of Solid State Chemistry 179, n. 4 (aprile 2006): 1293. http://dx.doi.org/10.1016/j.jssc.2006.01.070.

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35

Ohta, Michihiro. "Thermoelectric Properties of Ternary Rare-Earth Copper Antimonides LaCuxSb2 (0.9≤x≤1.3)". MATERIALS TRANSACTIONS 50, n. 7 (2009): 1881–84. http://dx.doi.org/10.2320/matertrans.m2009047.

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36

Bonamin, Leoni Villano, Renata Rossetini Palombo, Carolina Shultz Morim, Sandra AG Pinto, Luciane Costa Dalboni, Fabiana Rodrigues Santana, Michelle S. Correia e Maristela Dutra-Correa. "Searching for the mechanisms involved in Antimonium crudum action on macrophage – Leishmania interaction in vitro". International Journal of High Dilution Research - ISSN 1982-6206 17, n. 1 (22 luglio 2021): 02–04. http://dx.doi.org/10.51910/ijhdr.v17i1.891.

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In previous studies [1,2] we showed that treatment of mice with Antimonium crudum (Ant-c) 30cH was able to significantly reduce monocyte migration to the infection site after injection of Leishmania (L) amazonensis into the subcutaneous tissue, resulting in clinical improvement. Follow up was performed with an in vitro model, which showed that treatment of co-cultures of RAW 264.7 macrophages and parasites with Ant-c 30cH inhibited two parasite-induced CCL2 peaks 48 and 120 hours after infection together with early inhibition of lysosome activity. These findings explained the results previously obtained in vivo. In turn, treatment with Ant-c 200cH resulted in an early and transitory peak of cell spreading at 48 hours. The coherence between the in vivo and in vitro results indicates that this is a good model to study more thoroughly the mechanisms of action of homeopathic medicines, being the first step to establish correlations between the biological effects and the physical and chemical features of Ant-c 30cH and 200cH. In the present study, the same experimental model was replicated, through comparison of vehicle (30% cereal alcohol), Ant-c 200cH, Zincum metallicum (Zinc) 200cH and Arsenicum album (Ars) 200cH, to confirm the specificity of Ant-c effects. In addition, Ant-c 200cH was ultra-centrifuged, and only the superficial phase was applied to the culture medium. This procedure intended to separate the heavier particles from the lighter ones suspended in the homeopathic medicine. The physical-chemical profile of the medicines was assessed. Solid contaminants (microparticles) in the suspension were analyzed. Conductivity was assessed through measurement of the electron current induced by a micro-amperimeter (Ryodoraku®) connected to 2 clean electrodes immersed in the samples, prepared immediately before the analysis, diluted in pure water (MilliQ, Millipore®) and filtered in 22-µ filter (Millipore®). Pure water was used as control. The device was calibrated immediately before measurements. The microparticle profile was assessed with a scanning electronic microscope - SEM (JEOL JSM 6510®) coupled to an energy dispersive spectroscopy (EDS) system to identify the nature of the elements present in each particle. The size and the number of particles were analyzed from the images generated by electronic microscopy with an automatic image analysis system (Metamorph®). For this purpose, all materials used was cleansed through immersion in pure acetone and subjected to 30-minute sonication before insertion into the microscope to avoid secondary contamination. The samples of medicines were subjected to ultra-centrifugation (10000rpm for 60 minutes) to induce particle sedimentation in the bottom of microtubes. 10 microliters of each sample were collected from the bottom of tubes and placed on a copper stub and kept in a closed recipient until the material was fully dry. The samples were directly analyzed with the microscope. Metallization was not necessary, because the analyzed particles had metallic nature. The biological effects of Ant-c 200cH reproduced the previous ones: spreading and phagocytosis index were significantly higher in the co-cultures treated with Ant-c 200cH compared to vehicle and other, non-specific treatments (Ars 200cH and Zinc 200cH) (p=0.05). However, these results were not exhibited by centrifuged Ant-c 200cH. Analysis of the supernatant after 48-hour incubation revealed increase of the GM-CSF content only in cultures treated with Ant-c 200cH and centrifuged-Ant-c 200cH. No change was observed in the cytokine profile in the cultures treated with Ars 200cH or Zinc 200cH. Morphological analysis of Ant-c samples on SEM showed that the microparticles in Ant-c 30cH were smaller compared to Ant-c 6cH, most of them having half-moon shape. Curiously, agglomerates of particles were detected in Ant-c 200cH. Contaminant particles suspended in pure water contained Pb, Zn, Ca, Na, Au, Hg, Nb and Si, therefore, not related to any specific biological effect of Ant-c. P was identified only in Ant-c 30cH (6.51%) and Ant-c 200cH (13.56%). This wide-range profile of different microparticles did not change after centrifugation, which indicates that the weight of these particles is not conditioned by the nature of their component elements. Conductivity was lower in the vehicle (30% alcohol) compared to Ant-c 6, 30 and 200cH (p=0.0001); the conductivity of Ant-c 200cH was the highest (p=0.008). Also Ars 200cH exhibited higher conductivity (p=0.001) compared to the vehicle. Taken together, these data suggest that the biological effect of Ant-c 200cH on macrophage spreading and phagocytosis might be partially related to the size of the microparticles found in suspension. However, specific effects relative to cytokine production did not depend on microparticle size or content. The changes in conductivity changes exhibited correlation with presence of some elements, such as P, but not with any biological effect. To summarize, the results point to the relevance of eventual false-positive effects relative to phagocytosis in macrophages treated with homeopathic medicines in vitro, due to the interference of larger sized microparticles. They also points to the specificity of GM-CSF expression after 48-hours of co-culture exposure to Ant-c 200cH, centrifuged or not, which suggests it was independent from microparticle content and conductivity. The physical-chemical features of homeopathic medicines related to their specific biological effects are still unknown. Additional studies are needed in this regard.
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37

Schauffer, Dennis. "We know what we are, but not what we may be". Journal for Transdisciplinary Research in Southern Africa 2, n. 2 (11 aprile 2006). http://dx.doi.org/10.4102/td.v2i2.285.

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This essay attempts to trace a personal journey from a liberal humanist stance to an awareness of non-dualism within the altering landscape of contemporary advances in technology. My fundamental argument is that the single inimitable characteristic of human consciousness is an ability to encompass non-dual thought and that this capacity can a priori not be copied, scanned or uploaded into an informational matrix that operates through bi-polar antimonies.
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38

Wang, Shutao, Na Liu, Qi Cheng, Bo Pang e Jiangtao Lv. "Surface Plasmon Resonance on the Antimonene–Fe2O3–Copper Layer for Optical Attenuated Total Reflection Spectroscopic Application". Plasmonics, 11 novembre 2020. http://dx.doi.org/10.1007/s11468-020-01309-1.

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39

Zhang, Miaomiao, Max Kolton, Zhe Li, Hanzhi Lin, Fangbai Li, Guimei Lu, Pin Gao et al. "Bacteria responsible for antimonite oxidation in antimony-contaminated soil revealed by DNA-SIP coupled to metagenomics". FEMS Microbiology Ecology 97, n. 5 (31 marzo 2021). http://dx.doi.org/10.1093/femsec/fiab057.

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ABSTRACT Antimony (Sb), the analog of arsenic (As), is a toxic metalloid that poses risks to the environment and human health. Antimonite (Sb(III)) oxidation can decrease Sb toxicity, which contributes to the bioremediation of Sb contamination. Bacteria can oxidize Sb(III), but the current knowledge regarding Sb(III)-oxidizing bacteria (SbOB) is limited to pure culture studies, thus underestimating the diversity of SbOB. In this study, Sb(III)-oxidizing microcosms were set up using Sb-contaminated rice paddies as inocula. Sb(III) oxidation driven by microorganisms was observed in the microcosms. The increasing copies and transcription of the arsenate-oxidizing gene, aioA, in the microcosms during biotic Sb(III) oxidation indicated that microorganisms mediated Sb(III) oxidation via the aioA genes. Furthermore, a novel combination of DNA-SIP and shotgun metagenomic was applied to identify the SbOB and predict their metabolic potential. Several putative SbOB were identified, including Paracoccus, Rhizobium, Achromobacter and Hydrogenophaga. Furthermore, the metagenomic analysis indicated that all of these putative SbOB contained aioA genes, confirming their roles in Sb(III) oxidation. These results suggested the concept of proof of combining DNA-SIP and shotgun metagenomics directly. In addition, the identification of the novel putative SbOB expands the current knowledge regarding the diversity of SbOB.
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40

"Evaluación de la aplicabilidad de especies forestales de la serranía peruana en fitorremediación de relaves mineros". Revista ECIPeru, 18 dicembre 2018, 83–87. http://dx.doi.org/10.33017/reveciperu2014.0013/.

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Evaluación de la aplicabilidad de especies forestales de la serranía peruana en fitorremediación de relaves mineros Assessment of the applicability of phytoremediation in mining tailings using forest species of the peruvian highland Javier Paredes Mur Universidad Católica de Santa María; Urb. San José s/n, Yanahuara, Arequipa DOI: https://doi.org/10.33017/RevECIPeru2014.0013/ Resumen La fitorremediación es una tecnología alternativa de bajo costo utilizada para descontaminar suelos con metales pesados. En este ensayo se evaluó el uso de especies forestales de la sierra peruana (Acacia visco, Buddleja coriacea, Eucalyptus globulus, Myoporum laetum, Polylepis racemosa y Schinus molle) para el tratamiento de relaves mineros. Se evaluó el desarrollo de las especies plantadas en relave minero durante 27 semanas y se hizo un análisis fisicoquímico al relave para determinar el pH y la concentración de elementos químicos. Las especies forestales demostraron tener gran tolerancia a suelos contaminados y se obtuvo una remoción de los elementos químicos: antimonio (Sb), arsénico (As), cadmio (Cd), cobre (Cu), plata (Ag) y plomo (Pb). Descriptores: relaves mineros, fitorremediación, contaminación, especies forestales. Abstract Phytoremediation is a low cost remediation technology used to decontaminate soils from heavy metals. In this study, the use of forest species from the Peruvian Andes (Acacia visco, Buddleja coriacea, Eucalyptus globulus, Myoporum laetum, Polylepis racemosa and Schinus molle) for the treatment of mine tailings, was evaluated. The development of the species in the mining waste was evaluated for 27 weeks, and the pH and concentration of chemical elements were analyzed. The employed species demonstrated a great grow tolerance in contaminated soils, and was removed chemical elements, such as antimony (Sb), arsenic (As), cadmium (Cd), copper (Cu), silver (Ag) and lead (Pb). Keywords: mining tailings, phytoremediation, contamination, forest species.
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