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Journal articles on the topic 'Copper polyphosphates'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Acevedo-López, José, Gabriela González-Madrid, Claudio A. Navarro, and Carlos A. Jerez. "Role of Polyphosphate as an Inorganic Chaperone to Prevent Protein Aggregation Under Copper Stress in Saccharolobus solfataricus." Microorganisms 12, no. 12 (2024): 2627. https://doi.org/10.3390/microorganisms12122627.

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Polyphosphates are biopolymers composed of phosphate monomers linked by high-energy phosphoanhydride bonds. They are present across all life domains, serving as a source of energy, metal chelators, and playing a crucial role in stress defense. In Escherichia coli, polyphosphates also function as inorganic molecular chaperones. The present study aims to investigate whether polyphosphate serves a similar chaperone function in archaea, using Saccharolobus solfataricus as a model organism. To this end, polyphosphate was extracted and quantified, the ADP/ATP ratio was determined, insoluble protein

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2

Alvarez, Sergio, and Carlos A. Jerez. "Copper Ions Stimulate Polyphosphate Degradation and Phosphate Efflux in Acidithiobacillus ferrooxidans." Applied and Environmental Microbiology 70, no. 9 (2004): 5177–82. http://dx.doi.org/10.1128/aem.70.9.5177-5182.2004.

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ABSTRACT For some bacteria and algae, it has been proposed that inorganic polyphosphates and transport of metal-phosphate complexes could participate in heavy metal tolerance. To test for this possibility in Acidithiobacillus ferrooxidans, a microorganism with a high level of resistance to heavy metals, the polyphosphate levels were determined when the bacterium was grown in or shifted to the presence of a high copper concentration (100 mM). Under these conditions, cells showed a rapid decrease in polyphosphate levels with a concomitant increase in exopolyphosphatase activity and a stimulation

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3

Vojvodić, Snežana, Marina Stanić, Bernd Zechmann, et al. "Mechanisms of detoxification of high copper concentrations by the microalga Chlorella sorokiniana." Biochemical Journal 477, no. 19 (2020): 3729–41. http://dx.doi.org/10.1042/bcj20200600.

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Microalgae have evolved mechanisms to respond to changes in copper ion availability, which are very important for normal cellular function, to tolerate metal pollution of aquatic ecosystems, and for modulation of copper bioavailability and toxicity to other organisms. Knowledge and application of these mechanisms will benefit the use of microalgae in wastewater processing and biomass production, and the use of copper compounds in the suppression of harmful algal blooms. Here, using electron microscopy, synchrotron radiation-based Fourier transform infrared spectroscopy, electron paramagnetic r

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Horbatiuk, N. "ASSESSMENT OF THE CHEMICAL CONDITION OF DRINKING WATER IN UKRAINE DURING THE WAR." Sciences of Europe, no. 123 (August 21, 2023): 6–8. https://doi.org/10.5281/zenodo.8266044.

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In March 2022, during the Russian aggression, shelling and shells hit water pumping stations, water pipes, and sewage treatment plants, which led to accidents and changes in the quality of drinking water. To determine the condition and safety of drinking water, we conducted a study of its chemical composition. The content of: total iron, manganese, copper, polyphosphates, chlorides, zinc, mercury, lead and dry residue was determined in drinking water according to standard methods.

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Rivero, Matías, Constanza Torres-Paris, Rodrigo Muñoz, Ricardo Cabrera, Claudio A. Navarro, and Carlos A. Jerez. "Inorganic Polyphosphate, Exopolyphosphatase, andPho84-Like Transporters May Be Involved in Copper Resistance inMetallosphaera sedulaDSM 5348T." Archaea 2018 (2018): 1–12. http://dx.doi.org/10.1155/2018/5251061.

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Polyphosphates (PolyP) are linear polymers of orthophosphate residues that have been proposed to participate in metal resistance in bacteria and archaea. In addition of having a CopA/CopB copper efflux system, the thermoacidophilic archaeonMetallosphaera sedulacontains electron-dense PolyP-like granules and a putative exopolyphosphatase (PPXMsed,Msed_0891) and four presumedpho84-like phosphate transporters (Msed_0846,Msed_0866,Msed_1094, andMsed_1512) encoded in its genome. In the present report, the existence of a possible PolyP-based copper-resistance mechanism inM. sedulaDSM 5348Twas evalua

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Puziy, Alexander M., Olga I. Poddubnaya, Barbara Gawdzik, Magdalena Sobiesiak, and Myroslav Sprynskyy. "Structural Evolution of Polyimide-Derived Carbon during Phosphoric Acid Activation." C 8, no. 3 (2022): 47. http://dx.doi.org/10.3390/c8030047.

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Carbon adsorbents were obtained by carbonization of polyimide polymer with and without the presence of phosphoric acid at temperatures in the range of 400–1000 °C. Carbons produced in the presence of phosphoric acid have been demonstrated to contain up to 13.2% phosphorus. The structure of phosphorus-containing compounds was investigated by XPS and 31P MAS NMR methods. Deconvolution of the P 2p peak with variable binding energy showed the presence of only phosphates/polyphosphates. However, a low value of the O/P ratio is an indirect indication of the possible presence of phosphonates. A 31P M

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7

Bobtelsky, M., and S. Kertes. "The polyphosphates of manganese, cobalt, nickel and copper: Their complex character, composition and behaviour." Journal of Applied Chemistry 5, no. 12 (2007): 675–86. http://dx.doi.org/10.1002/jctb.5010051206.

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8

Flores-García, Mirthala, Juan Manuel Fernández-G., Cristina Busqueta-Griera, et al. "New Copper Compounds with Antiplatelet Aggregation Activity." Medicinal Chemistry 15, no. 8 (2019): 850–62. http://dx.doi.org/10.2174/1573406415666190222123207.

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Background: Ischemic heart disease, cerebrovascular accident, and venous thromboembolism have the presence of a thrombotic event in common and represent the most common causes of death within the population. Objective: Since Schiff base copper(II) complexes are able to interact with polyphosphates (PolyP), a procoagulant and potentially prothrombotic platelet agent, we investigated the antiplatelet aggregating properties of two novel tridentate Schiff base ligands and their corresponding copper( II) complexes. Methods: The Schiff base ligands (L1) and (L2), as well as their corresponding coppe

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9

Liu, J., R. M. Friedman, E. Cortez, F. Pacholec, and S. M. Vesecky. "Investigation of film formation in water-distribution systems by field emission sem and spectroscopy techniques." Proceedings, annual meeting, Electron Microscopy Society of America 54 (August 11, 1996): 212–13. http://dx.doi.org/10.1017/s0424820100163526.

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EPA has set limits on the concentration of heavy metals in drinking water supplies to protect the public health. Furthermore, the failure of pipes in the water distribution system from corrosion represents a massive investment in rebuilding its infrastructure. We have initiated a program to study the formation of corrosion-inhibition films formed in potable water delivery systems using various chemical phosphate treatments. In particular, blends of ortho- and polyphosphates have recently been used to reduce both lead and copper leaching. Several factors are important to the successful implemen

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10

Li, Yanhong, Jing Wang, Yuliang Wang, Wenjia Du, and Shuanke Wang. "Transplantation of copper-doped calcium polyphosphate scaffolds combined with copper (II) preconditioned bone marrow mesenchymal stem cells for bone defect repair." Journal of Biomaterials Applications 32, no. 6 (2018): 738–53. http://dx.doi.org/10.1177/0885328217739456.

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Calcium polyphosphate is a bioactive ceramic that possesses similar mineral components to bone and possess good physicochemical properties. However, pure calcium polyphosphate scaffold is brittle, and it is insufficient in promoting vascularization and osteoinductivity. This study was conducted to assess whether copper (Cu) incorporated into calcium polyphosphate could improve the scaffolds’ inherent shortcomings. In the experiments, Cu-calcium polyphosphate scaffolds’ mechanical strength, biocompatibility, and biodegradability were researched primarily. And then, hypoxia-inducible factor 1-al

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Zozulia, V., J. Shatrava, T. Sliva, V. Ovchynnikov, and V. Amirkhanov. "COORDINATION COMPOUNDS OF COBALT AND COPPER BASED ON CAPH LIGAND N,N'-DIBENZYL-N"-TRICHLORACETYLPHOSPHORIC TRIAMIDE." Bulletin of Taras Shevchenko National University of Kyiv. Chemistry, no. 1(55) (2018): 27–31. http://dx.doi.org/10.17721/1728-2209.2018.1(55).6.

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Сarbacylamidophosphates is a class of organic compounds having a composition -C(O)NHP(O)=. The presence of both peptide and phosphoramidic groups in the same molecule causes a wide range of inherent biological properties. On the basis of the ligand of the carbacylamide phosphorus type (CAPh ligand) N, N'-dibenzyl-N"-trichloroacetylphosphoric triamide (HL), di- and tetramer coordination compounds were synthesized: cobalt (II) Co2L4(СH3OH)2 and copper (ІI) Cu4L4(OCH3)4. The composition and structure of the synthesized compounds was studied using the methods of IR spectroscopy, thermogravimetric

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12

Gomes, F. M., D. B. Carvalho, A. C. Peron, K. Saito, K. Miranda, and E. A. Machado. "Inorganic polyphosphates are stored in spherites within the midgut of Anticarsia gemmatalis and play a role in copper detoxification." Journal of Insect Physiology 58, no. 2 (2012): 211–19. http://dx.doi.org/10.1016/j.jinsphys.2011.09.008.

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13

Jastrzab, Renata, and Lechoslaw Lomozik. "Stability and Coordination Mode of Complexes of Polyphosphates and Polymetaphosphates with Copper(II) Ions in Aqueous Solution—Potentiometric, Spectral and Theoretical Studies." Journal of Solution Chemistry 39, no. 7 (2010): 909–19. http://dx.doi.org/10.1007/s10953-010-9558-1.

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14

Lewandowski, Brian, Kathie Lusker, Zorabel LeJeune, et al. "Impact of pH, Dissolved Inorganic Carbon, and Polyphosphates for the Initial Stages of Water Corrosion of Copper Surfaces Investigated by AFM and NEXAFS." CheM 1, no. 1 (2011): 16–26. http://dx.doi.org/10.5618/chem.2011.v1.n1.3.

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15

Guo, Chengrui, Li Li, Shuangshuang Li, Yaping Wang, and Xixun Yu. "Preparation, characterization, bioactivity and degradation behavior in vitro of copper-doped calcium polyphosphate as a candidate material for bone tissue engineering." RSC Advances 7, no. 67 (2017): 42614–26. http://dx.doi.org/10.1039/c7ra06159e.

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In this study, copper, as one of the essential trace elements in the human body, was introduced into calcium polyphosphate (CPP) to prepare a novel scaffold in bone tissue engineering: copper-doped calcium polyphosphate (CCPP) scaffolds.

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16

S., S. Das, P. Baranwal B., A. Rayeeny S., and Singh Punita. "Catalytic action of water-miscible organic solvents on the hydrolytic degradation of phosphate glasses." Journal of Indian Chemical Society Vol. 80, Apr 2003 (2003): 379–83. https://doi.org/10.5281/zenodo.5839704.

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Department of Chemistry, D. D. U. Gorakhpur University, Gorakhpur-273 001, India <em>E-mail : </em>ssdas2002@rediffmail.com <em>Manuscript received 1 October 2002</em> A number of samples of sodium-nickel and sodium-copper copolyphosphate glasses having Na : Ni/Cu ratio 9 : 1 and 8 : 2 were prepared alongwith control samples of sodium polyphosphate. Their hydrolytic degradation catalyzed by six watermiscible organic solvents methanol, ethanol, <em>n</em>-propanol, <em>t</em>-butanol, acetone and dioxane at four different concentrations (10, 20, 30 and 40%, v/v) at 35° was studied. While th

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17

Remonsellez, Francisco, Alvaro Orell, and Carlos A. Jerez. "Copper tolerance of the thermoacidophilic archaeon Sulfolobus metallicus: possible role of polyphosphate metabolism." Microbiology 152, no. 1 (2006): 59–66. http://dx.doi.org/10.1099/mic.0.28241-0.

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It has been postulated that inorganic polyphosphate (polyP) and transport of metal–phosphate complexes could participate in heavy metal tolerance in some bacteria. To study if such a system exists in archaea, the presence of polyP was determined by the electron energy loss spectroscopy (EELS) procedure and quantified by using specific enzymic methods in Sulfolobus acidocaldarius, Sulfolobus metallicus and Sulfolobus solfataricus. All three micro-organisms synthesized polyP during growth, but only S. metallicus greatly accumulated polyP granules. The differences in the capacity to accumulate po

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18

González-Madrid, Gabriela, Claudio A. Navarro, José Acevedo-López, Luis H. Orellana, and Carlos A. Jerez. "Possible Role of CHAD Proteins in Copper Resistance." Microorganisms 12, no. 2 (2024): 409. http://dx.doi.org/10.3390/microorganisms12020409.

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Conserved Histidine Alpha-helical Domain (CHAD) proteins attached to the surface of polyphosphate (PolyP) have been studied in some bacteria and one archaeon. However, the activity of CHAD proteins is unknown beyond their interaction with PolyP granules. By using bioinformatic analysis, we report that several species of the biomining acidophilic bacteria contain orthologs of CHAD proteins with high sequence identity. Furthermore, the gene coding for the CHAD protein is in the same genetic context of the enzyme polyphosphate kinase (PPK), which is in charge of PolyP synthesis. Particularly, the

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19

Ito, Hiroyasu, Masahiro Inouhe, Hiroshi Tohoyama, and Masanori Joho. "Effect of Copper on Acid Phosphatase Activity in Yeast Yarrowia lipolytica." Zeitschrift für Naturforschung C 62, no. 1-2 (2007): 70–76. http://dx.doi.org/10.1515/znc-2007-1-213.

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Acid phosphatase (APase) activity of the yeast Yarrowia lipolytica increased with increasing Cu2+ concentrations in the medium. Furthermore, the enzyme in soluble form was stimulated in vitro by Cu2+, Co2+, Ni2+, Mn2+ and Mg2+ and inhibited by Ag+ and Cd2+. The most effective ion was Cu2+, especially for the enzyme from cultures in medium containing Cu2+, whereas APase activity in wall-bound fragments was only slightly activated by Cu2+. The content of cellular phosphate involving polyphosphate was decreased by adding Cu2+, regardless of whether or not the medium was rich in inorganic phosphat

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20

Hashemi, F., G. G. Leppard, and D. J. Kushnert. "Copper resistance in Anabaena variabilis: Effects of phosphate nutrition and polyphosphate bodies." Microbial Ecology 27, no. 2 (1994): 159–76. http://dx.doi.org/10.1007/bf00165815.

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21

Schock, Michael R., Darren A. Lytle, Anne M. Sandvig, Jonathan Clement, and Stephen M. Harmon. "Replacing polyphosphate with silicate to solve lead, copper, and source water iron problems." Journal - American Water Works Association 97, no. 11 (2005): 84–93. http://dx.doi.org/10.1002/j.1551-8833.2005.tb07521.x.

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22

Bandyopadhyay, Siladitya, Kunal Ghosh, and Chandrika Varadachari. "Multimicronutrient Slow-Release Fertilizer of Zinc, Iron, Manganese, and Copper." International Journal of Chemical Engineering 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/327153.

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The process for the production of a slow-release micronutrient fertilizer is described. The compound contains zinc, iron, manganese, and copper as micronutrients and is produced by polymerizing a system containing phosphoric acid, zinc oxide, hematite, pyrolusite, copper sulfate, and magnesium oxide followed by neutralization of the polyphosphate chain with ammonium hydroxide. Changes in temperature, density, and viscosity of the reaction system during polymerization were studied. Reaction kinetics was studied at three different temperatures. Rate curves revealed a multistage process with esse

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23

Ikeh, Mélanie A. C., Stavroula L. Kastora, Alison M. Day, et al. "Pho4 mediates phosphate acquisition inCandida albicansand is vital for stress resistance and metal homeostasis." Molecular Biology of the Cell 27, no. 17 (2016): 2784–801. http://dx.doi.org/10.1091/mbc.e16-05-0266.

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During interactions with its mammalian host, the pathogenic yeast Candida albicans is exposed to a range of stresses such as superoxide radicals and cationic fluxes. Unexpectedly, a nonbiased screen of transcription factor deletion mutants revealed that the phosphate-responsive transcription factor Pho4 is vital for the resistance of C. albicans to these diverse stresses. RNA-Seq analysis indicated that Pho4 does not induce stress-protective genes directly. Instead, we show that loss of Pho4 affects metal cation toxicity, accumulation, and bioavailability. We demonstrate that pho4Δ cells are s

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Toso, Daniel B., Muhammad Mohsin Javed, Elizabeth Czornyj, Robert P. Gunsalus, and Z. Hong Zhou. "Discovery and Characterization of Iron Sulfide and Polyphosphate Bodies Coexisting inArchaeoglobus fulgidusCells." Archaea 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/4706532.

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Inorganic storage granules have long been recognized in bacterial and eukaryotic cells but were only recently identified in archaeal cells. Here, we report the cellular organization and chemical compositions of storage granules in the Euryarchaeon, Archaeoglobus fulgidusstrain VC16, a hyperthermophilic, anaerobic, and sulfate-reducing microorganism. Dense granules were apparent inA. fulgiduscells imaged by cryo electron microscopy (cryoEM) but not so by negative stain electron microscopy. Cryo electron tomography (cryoET) revealed that each cell contains one to several dense granules located n

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Baba, Haruo, Toshiaki Kodama, and Tetsuo Fujii. "Effect of Silicate and Polyphosphate on the Pitting Corrosion of Copper Tubes in Hot Water." CORROSION ENGINEERING 36, no. 4 (1987): 219–27. http://dx.doi.org/10.3323/jcorr1974.36.4_219.

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26

Esteves, Catarina V., Judite Costa, David Esteban-Gómez, et al. "Phosphate and polyphosphate anion recognition by a dinuclear copper(ii) complex of an unsymmetrical squaramide." Dalton Transactions 48, no. 27 (2019): 10104–15. http://dx.doi.org/10.1039/c9dt01434a.

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At pH = 7.4, ATP<sup>4−</sup> is selectively removed from water containing PhPO<sub>4</sub><sup>2−</sup>, Haep<sup>−</sup>, AMP<sup>2−</sup> and ADP<sup>3−</sup> by the studied squaramide-based dicopper(ii) complex.

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27

Müller, Werner, Xiaohong Wang, Yue-Wei Guo, and Heinz Schröder. "Potentiation of the Cytotoxic Activity of Copper by Polyphosphate on Biofilm-Producing Bacteria: A Bioinspired Approach." Marine Drugs 10, no. 12 (2012): 2369–87. http://dx.doi.org/10.3390/md10112369.

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28

Sun, Xinzeng, Huanqing Niu, Jiarui Song, et al. "Preparation of a Copper Polyphosphate Kinase Hybrid Nanoflower and Its Application in ADP Regeneration from AMP." ACS Omega 5, no. 17 (2020): 9991–98. http://dx.doi.org/10.1021/acsomega.0c00329.

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Grillo-Puertas, Mariana, Lici Schurig-Briccio, Luisa Rodríguez-Montelongo, María Rintoul, and Viviana Rapisarda. "Copper tolerance mediated by polyphosphate degradation and low-affinity inorganic phosphate transport system in Escherichia coli." BMC Microbiology 14, no. 1 (2014): 72. http://dx.doi.org/10.1186/1471-2180-14-72.

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30

Chen, Xilei, Xihong Chen, Shaoxiang Li, and Chuanmei Jiao. "Copper metal‐organic framework toward flame‐retardant enhancement of thermoplastic polyurethane elastomer composites based on ammonium polyphosphate." Polymers for Advanced Technologies 32, no. 8 (2021): 2829–42. http://dx.doi.org/10.1002/pat.5260.

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31

Latty, Monique hazel, James Sullivan, and Paul Gaskin. "Salmon Sperm DNA As a Corrosion Inhibitor on Ductile Cast for Use in Water Distribution System Pipes." ECS Meeting Abstracts MA2022-01, no. 16 (2022): 1018. http://dx.doi.org/10.1149/ma2022-01161018mtgabs.

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Ductile cast iron (DCI) is a high carbon iron alloy with a composition of up to 3.7% C, 2.3% Si, 0.35% Mn and various smaller constitutes. Upon casting of DCI, the high carbon content results in solidification in a secondary phase in the form of graphite nodules. These graphite nodules form around a matrix of ferrite (α-Fe) and pearlite (α-Fe + Fe3C) and impart desirable properties such as high strength properties and corrosion resistance due to graphite’s cathodic potential. DCI is commonly used for water distribution pipework and contribute to 40% of all drinking water distribution pipes in

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Orell, A., C. A. Navarro, and Carlos A. Jerez. "Copper Resistance Mechanisms of Biomining Bacteria and Archaea Living under Extremely High Concentrations of Metals." Advanced Materials Research 71-73 (May 2009): 279–82. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.279.

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Extremophiles such as the acidophilic Sulfolobus metallicus (Archaea) and Acidithiobacillus ferrooxidans (Bacteria) can resist Cu (CuSO4) concentrations of 200 mM and 800 mM respectively. These microorganisms are important in biomining processes to extract copper and other metals. A. ferrooxidans grown at low Cu concentrations (5 mM) expressed genes coding for ATPases most likely involved in pumping the metal from the cytoplasm to the periplasm of the bacterium. At 100 mM Cu the previous systems were repressed and there was a great induction in the expression of efflux systems known to use the

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Zakharchenko, A. A., S. V. Borisov, M. A. Vaniev, et al. "Casting Compositions Based on Phosphorus-Containing Polyol, Melamine Polyphosphate, and Copper Orthohydrophosphate for the Design of Low-Combustible Foamed Polymurethanes." Polymer Science, Series D 16, no. 1 (2023): 111–15. http://dx.doi.org/10.1134/s1995421223010355.

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Hascoet, M. C., M. Florentz, and P. Granger. "Biochemical Aspects of Enhanced Biological Phosphorus Removal from Wastewater." Water Science and Technology 17, no. 11-12 (1985): 23–41. http://dx.doi.org/10.2166/wst.1985.0219.

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Enhanced biological phosphorus removal from wastewater by means of microorganisms found in activated sludge has for the past few years been the subject of much research and it is now commonly recognized that an activated sludge system must include alternating anaerobic-aerobic periods. The present article covers biochemical aspects of this phenomenon using a phosphorus removing biomass obtained in a laboratory-scale pilot with alternating phases and a synthetic substrate feed. The percentage of phosphorus obtained in the pilot sludge was four times greater than that of a conventional sludge pl

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Islam, Md Nazrul, Keisuke Ando, Hidefumi Yamauchi, et al. "Impregnation of laser incised wood of Douglas fir and Japanese cedar by dipping (passive impregnation) in solutions of copper azole (CuAz-B) and a fire retardant (PPC)." Holzforschung 68, no. 3 (2014): 353–60. http://dx.doi.org/10.1515/hf-2013-0140.

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Abstract The performance of the passive impregnation method of CO2-laser incised lumber has been investigated concerning wood preservation against different wood-destroying agents. Copper azole type B (CuAz-B) preservative and polyphosphatic carbamate (PPC) fire retardant were impregnated into Douglas fir and Japanese cedar lumber under both green and kiln-dried conditions. Final drying of the lumber was performed by steam injection or kiln drying. The temperature and pressure change in the lumber, as well as the total chemical retention, penetration, decay resistance, fire retardancy and tota

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Tsai, Yung-Pin, and Hsiu-Ting Chen. "Influence of sludge retention time on tolerance of copper toxicity for polyphosphate accumulating organisms linked to polyhydroxyalkanoates metabolism and phosphate removal." Bioresource Technology 102, no. 23 (2011): 11043–47. http://dx.doi.org/10.1016/j.biortech.2011.09.050.

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Riyazuddin, Samrin Bano, Fohad Mabood Husain, et al. "Role of Copper Oxide on Epoxy Coatings with New Intumescent Polymer-Based Fire Retardant." Molecules 25, no. 24 (2020): 5978. http://dx.doi.org/10.3390/molecules25245978.

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Epoxy resins (EP) have been used as a thermos-setting material in the field of coating, casting, bonding agent, and laminating. However, a major drawback associated with its use is the lack of good flaming properties, and it is responsible for heavy smoke along with hazardous gases considerably limiting its uses in various fields. In this study, N-ethanolamine triazine-piperizine, a melamine polymer (ETPMP), was established as a new charring-foaming agent and was successfully synthesized with ethanolamine, piperizine, cyanuric chloride, and melamine as precursor molecules via the nucleophilic

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Barczewski, Mateusz, Aleksander Hejna, Kamila Sałasińska, et al. "Thermomechanical and Fire Properties of Polyethylene-Composite-Filled Ammonium Polyphosphate and Inorganic Fillers: An Evaluation of Their Modification Efficiency." Polymers 14, no. 12 (2022): 2501. http://dx.doi.org/10.3390/polym14122501.

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The development of new polymer compositions characterized by a reduced environmental impact while lowering the price for applications in large-scale production requires the search for solutions based on the reduction in the polymer content in composites’ structure, as well as the use of fillers from sustainable sources. The study aimed to comprehensively evaluate introducing low-cost inorganic fillers, such as copper slag (CS), basalt powder (BP), and expanded vermiculite (VM), into the flame-retarded ammonium polyphosphate polyethylene composition (PE/APP). The addition of fillers (5–20 wt%)

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Esteves, Catarina V., David Esteban-Gómez, Carlos Platas-Iglesias, Raphaël Tripier, and Rita Delgado. "Steric Effects on the Binding of Phosphate and Polyphosphate Anions by Zinc(II) and Copper(II) Dinuclear Complexes of m-Xylyl-bis-cyclen." Inorganic Chemistry 57, no. 11 (2018): 6466–78. http://dx.doi.org/10.1021/acs.inorgchem.8b00539.

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Kalynovskyi, V. Y., A. S. Pustovalov, G. Y. Grodzyuk, N. S. Andriushyna, and M. E. Dzerzhynsky. "Effect of gold and silver nanoparticles on the morpho-functional state of the epididymis and prostate gland in rats." Visnyk of Dnipropetrovsk University. Biology, medicine 7, no. 2 (2016): 106–11. http://dx.doi.org/10.15421/021619.

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Metals are widely used in modern medicine: iron, copper, zinc, vanadium, titanium – all of them are vital for treatment of different diseases. Recently a new field of medical technology has emerged, which focuses on the biomedical application of metallic nanoparticles, with a particular interest in a gold and silver-based materials. These structures are already used for photothermal anticancer therapy, drug delivery, bioimaging, radiosensitizers and as drugs themselves. Despite the wide usage of nanoparticles, we still don’t know much about the toxicity of nanomaterials. Nanotoxicological stud

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Terebilenko, Kateryna, Yegor Pashynskyi, and Mykola Slobodyanik. "EFFECT OF MoO3 ON THE STRUCTURE AND LUMINESCENT PROPERTIES OF SODIUM PHOSPHATE-GERMANATE GLASSES CONTAINING EUROPIUM(III)." Ukrainian Chemistry Journal 90, no. 11 (2024): 25–34. https://doi.org/10.33609/2708-129x.90.11.2024.25-34.

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This study investigates there gularities of obtaining phosphate-germanate glass modified with molybdenum(VI) oxide, with the following composition: (45-0.5x)P2O5-xMoO3-10.0GeO2-(45-0.5x)Na2O (x = 0.0-30.0). It was found that an increase in the concentration of MoO3from 5 to 30 mol% leads to a reduction in the width of the forbidden band of there sulting amorphous materials, from 3.53 eV to 3.42 eV. This change is accompanied by a decrease in hygroscopicity and an enhancement in solubility with respect to Eu2O3 when subjected to is other maltreatment at 1000 °C for 4 hours. The effect of MoO3

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Yik, L. Y., Chin, G. J. W. L., Joseph, C. G., and Rodrigues, K. F. "The effect of simulated copper stress on genes associated with the metabolism of polyphosphates and polyhydroxyalkanoates in Bacillus thuringiensis Y1." Malaysian Journal of Microbiology, December 2023. http://dx.doi.org/10.21161/mjm.230003.

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Souza, Patrícia Mendes de, Petrusk Homero Marinho, Marcos Antônio Barbosa de Lima, Aline Elesbão do Nascimento, and Galba Maria de Campos Takaki. "Copper influence on polyphosphate metabolism of Cunninghamella elegans." Brazilian Journal of Microbiology 36, no. 4 (2005). http://dx.doi.org/10.1590/s1517-83822005000400002.

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H., A. Taner, and Önen V. "Investigation of Some Flotation Parameters and the Role of Dispersants in the Flotation of Chalcopyrite." International Journal of Earth, Energy and Environmental Sciences 11.0, no. 11 (2018). https://doi.org/10.5281/zenodo.2021729.

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A suitable choice of flotation parameters and reagents have a strong effect on the effectiveness of flotation process. The objective of this paper is to give an overview of the flotation of chalcopyrite with the different conditions and dispersants. Flotation parameters such as grinding time, pH, type, and dosage of dispersant were investigated. In order to understand the interaction of some dispersants, sodium silicate, sodium hexametaphosphate and sodium polyphosphate were used. The optimum results were obtained at a pH of 11.5 and a grinding time of 10 minutes. A copper concentrate was prod

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Llorca, Marina García, and Rosa María Martínez-Espinosa. "Assessment of Haloferax mediterranei Genome in Search of Copper-Molecular Machinery With Potential Applications for Bioremediation." Frontiers in Microbiology 13 (June 15, 2022). http://dx.doi.org/10.3389/fmicb.2022.895296.

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Heavy metals are essential micronutrients at low concentrations, serving as cofactors for relevant microbial enzymes (i.e., respiratory nitrate and nitrite reductases NADH dehydrogenase-2, amine oxidase, etc.), but they become harmful cellular intoxicants at significant low concentrations compared to other chemical compounds. The increasing need to incorporate bioremediation in the removal of heavy metals and other contaminants from wastewaters has led extremophiles to the spotlight of research. The haloarchaeon Haloferax mediterranei has promising physiological characteristics regarding biore

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"Retraction: Transplantation of copper-doped calcium polyphosphate scaffolds combined with copper (II) preconditioned bone marrow mesenchymal stem cells for bone defect repair." Journal of Biomaterials Applications, October 24, 2024. http://dx.doi.org/10.1177/08853282241284192.

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Shi, Yongqian, Junqiang Han, Ansheng Yao, et al. "Constructing SiAPP‐NH₂@MOFs Core‐Shell Structure Toward Hierarchical Composites With Excellent Flame Retardancy, Smoke Suppression, and Electromagnetic Interference Shielding." Journal of Applied Polymer Science, February 23, 2025. https://doi.org/10.1002/app.56898.

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ABSTRACTDesigning multifunctional composites with high flame retardancy and excellent electromagnetic shielding performance is of significant importance. In order to address the poor flame retardant and electromagnetic shielding performances of thermoplastic polyurethane (TPU) composites, in this work, the γ‐propyl‐trimethoxysilane (KH550) functionalized silicon microencapsulated ammonium polyphosphate (SiAPP‐NH2) was synthesized using interface modulation technology. Then, SiAPP‐NH2 was combined with a copper metal–organic framework (MOF‐Cu) through microencapsulation and electrostatic self‐a

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Kim, Joshua E., Shaik Waseem Vali, Trang Q. Nguyen, Andrew Dancis та Paul A. Lindahl. "Mössbauer and LC-ICP-MS investigation of iron trafficking between vacuoles and mitochondria in Vma2Δ Saccharomyces cerevisiae". Journal of Biological Chemistry, 2 грудня 2020, jbc.RA120.015907. http://dx.doi.org/10.1074/jbc.ra120.015907.

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Vacuoles are acidic organelles that store FeIII polyphosphate, participate in iron homeostasis, and have been proposed to deliver iron to mitochondria for iron-sulfur cluster (ISC) and heme biosynthesis. Vma2Δ cells have dysfunctional v-ATPases, rendering their vacuoles nonacidic. These cells have mitochondria that are iron-dysregulated, suggesting disruption of a putative vacuole-to-mitochondria iron trafficking pathway. To investigate this potential pathway, we examined the iron content of a Vma2Δ mutant derived from W303 cells using Mössbauer and EPR spectroscopies and LC-ICP-MS chromatogra

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Muñoz-Villagrán, Claudia, Jonnathan Grossolli-Gálvez, Javiera Acevedo-Arbunic, et al. "Characterization and genomic analysis of two novel psychrotolerant Acidithiobacillus ferrooxidans strains from polar and subpolar environments." Frontiers in Microbiology 13 (August 24, 2022). http://dx.doi.org/10.3389/fmicb.2022.960324.

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The bioleaching process is carried out by aerobic acidophilic iron-oxidizing bacteria that are mainly mesophilic or moderately thermophilic. However, many mining sites are located in areas where the mean temperature is lower than the optimal growth temperature of these microorganisms. In this work, we report the obtaining and characterization of two psychrotolerant bioleaching bacterial strains from low-temperature sites that included an abandoned mine site in Chilean Patagonia (PG05) and an acid rock drainage in Marian Cove, King George Island in Antarctic (MC2.2). The PG05 and MC2.2 strains

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Xu, Wenzong, Le Yao, Ding Ding, Haiou Zhou, Yaocheng Zhou, and Yi Zhang. "Influence of in‐situ growth of boron nitride with chestnut ball copper cobaltate synergistic ammonium polyphosphate on flame retardancy, smoke suppression, and thermal conductivity of polylactic acid." Polymers for Advanced Technologies, September 6, 2022. http://dx.doi.org/10.1002/pat.5858.

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