Ethylene carbonate adsorption on the major surfaces of lithium manganese oxide Li1 −xMn2O4 spinel (0.000 < x < 0.375): a DFT+U-D3 study
Phys. Chem. Chem. Phys., 2020, Accepted Manuscript DOI: 10.1039/C9CP05658K, PaperBrian Ramogayana, David Santos-Carballal, Pablo Arturo Aparicio Sanchez, Matthew Quesne, Khomotso Portia Maenetja, Phuti Esrom Ngoepe, Nora Henriette De Leeuw Understanding the surface reactivity of the commercial cathode material LiMn2O4 towards the electrolyte is important to improve the cycling performance of secondary lithium-ion batteries and to prevent manganese dissolution. In... The content of this RSS Feed (c) The Royal Society of Chemistry (Source: RSC - Phys. Chem. Chem. Phys. latest articles)
Source: RSC - Phys. Chem. Chem. Phys. latest articles - February 29, 2020 Category: Chemistry Authors: Brian Ramogayana Source Type: research
A novel method for the stabilization of soluble contaminants in electrolytic manganese residue: Using low-cost phosphogypsum leachate and magnesia/calcium oxide.
This study presents experimental results for the stabilization of NH4+-N and Mn2+ in the EMR using phosphogypsum leachate as a low-cost phosphate source and MgO/CaO (PLMC) process. The results demonstrated that the stabilization efficiency of NH4+-N and Mn2+ was 93.65% and 99.99%, respectively, under the following conditions: a phosphogypsum leachate dose of 1.5 mL g-1, an added MgO dose of 0.036 g g-1, an added CaO dose of 0.1 g g-1 and a reaction time of 2 h. The stabilization effect of the PLMC process was higher and more cost effective than that of using Na3PO4·12H2O and MgO/Ca...
Source: Ecotoxicology and Environmental Safety - February 29, 2020 Category: Environmental Health Authors: Chen H, Long Q, Zhang Y, Wang S, Deng F Tags: Ecotoxicol Environ Saf Source Type: research
[ASAP] Manganese-Mediated Growth of ZnS Shell on KMnF < sub > 3 < /sub > :Yb,Er Cores toward Enhanced Up/Downconversion Luminescence
ACS Applied Materials& InterfacesDOI: 10.1021/acsami.9b21832 (Source: ACS Applied Materials and Interfaces)
Source: ACS Applied Materials and Interfaces - February 28, 2020 Category: Materials Science Authors: Haoran Ning †‡, Lihong Jing*†, Yi Hou†, Sergii Kalytchuk§, Yingying Li†‡, Xiaodan Huang†‡, and Mingyuan Gao*†‡ Source Type: research
Synthesis and crystal structure of (1,4,7,10-tetraazacyclododecane- κ 4N)(tetrasulfido- κ 2S1,S4)manganese(II)
The title compound, [Mn(S4)(C8H20N4)], was accidentally obtained by the hydrothermal reaction of Mn(ClO4)2 · 6H2O, cyclen (cyclen = 1,4,7,10-tetraazacyclododecane) and Na3SbS4 · 9H2O in water at 413 K, indicating that polysulfide anions might represent intermediates in the synthesis of thiometallate compounds using Na3SbS4 · 9H2O as a reactant. X-ray powder diffraction proves that the sample is slightly contaminated with NaSb(OH)6 and an unknown crystalline phase. The crystal investigated was twinned with a twofold rotation axis as the twin element, and therefore a twin refinement using data in HKL...
Source: Acta Crystallographica Section E - February 28, 2020 Category: Chemistry Authors: Danker, F. N ä ther, C. Bensch, W. Tags: crystal structure polysulfide manganese(II) discrete complex hydrogen bonding research communications Source Type: research
Toxic levels of manganese in an acidic Cambisol alters antioxidant enzymes activity, element uptake and subcellular distribution in Triticum aestivum.
Abstract In the Montado system, in Portuguese Alentejo region, some Eutric Cambisols are known to promote manganese (Mn) toxicity in wheat. Variation on bioavailable Mn concentration depends on soil acidity, which can be increased by natural events (e.g. waterlogging) or human activity (e.g. excess use of chemical fertilizers). The effect of increasing soil Mn on crop element uptake, element distribution and oxidative stress was evaluated on winter wheat (Triticum aestivum). Plants were grown for 3 weeks in an acidic Cambisol spiked with increasing Mn concentrations (0, 45.2 and 90.4 mg MnCl2/Kg soil). Calciu...
Source: Ecotoxicology and Environmental Safety - February 28, 2020 Category: Environmental Health Authors: Faria JMS, Teixeira DM, Pinto AP, Brito I, Barrulas P, Alho L, Carvalho M Tags: Ecotoxicol Environ Saf Source Type: research
Critical role of corrosion inhibitors modified by silyl ether functional groups on electrochemical performances of lithium manganese oxides
Publication date: Available online 26 February 2020Source: Journal of Energy ChemistryAuthor(s): Min Ji Seong, Taeeun Yim (Source: Journal of Energy Chemistry)
Source: Journal of Energy Chemistry - February 27, 2020 Category: Chemistry Source Type: research
[ASAP] In Situ Construction of Spinel Coating on the Surface of a Lithium-Rich Manganese-Based Single Crystal for Inhibiting Voltage Fade
ACS Applied Materials& InterfacesDOI: 10.1021/acsami.9b21271 (Source: ACS Applied Materials and Interfaces)
Source: ACS Applied Materials and Interfaces - February 26, 2020 Category: Materials Science Authors: Hang Peng †‡, Shi-Xi Zhao*†, Chao Huang†‡, Lu¨-Qaing Yu†‡, Zou-Qiang Fang‡, and Guo-Dan Wei† Source Type: research
Manganese dioxide thin films deposited by chemical bath and successive ionic layer adsorption and reaction deposition methods and their supercapacitive performance
Publication date: Available online 24 February 2020Source: Inorganic Chemistry CommunicationsAuthor(s): V.J. Mane, D.B. Malavekar, S.B. Ubale, V.C. Lokhande, C.D. Lokhande (Source: Inorganic Chemistry Communications)
Source: Inorganic Chemistry Communications - February 26, 2020 Category: Chemistry Source Type: research
Binuclear manganese-iron complexes containing ferrocenyl thiosemicarbazones: biological activity and carbon monoxide-releasing properties
Publication date: Available online 25 February 2020Source: Inorganica Chimica ActaAuthor(s): Madelyn L. Lawrence, Steven M. Shell, Floyd A. Beckford (Source: Inorganica Chimica Acta)
Source: Inorganica Chimica Acta - February 26, 2020 Category: Chemistry Source Type: research
Molecules, Vol. 25, Pages 1053: Quercetin Protects Against Lipopolysaccharide-Induced Intestinal Oxidative Stress in Broiler Chickens through Activation of Nrf2 Pathway
Wenfa Lu We investigated the potential ability of quercetin to protect against lipopolysaccharide (LPS)-induced intestinal oxidative stress in broiler chickens and the potential role of the Nrf2 (nuclear factor erythroid 2-related factor 2) signaling pathway. One-day-old broiler chickens (n = 240) were randomized into four groups: saline-challenged broiler chickens fed a basal diet (Con), LPS-challenged broiler chickens on a basal diet (LPS), and LPS-treated broiler chickens on a basal diet containing either 200 or 500 mg/kg of quercetin (Que200+LPS or Que500+LPS). Quercetin (200 mg/kg) significantly alleviated LPS-...
Source: Molecules - February 26, 2020 Category: Chemistry Authors: Lei Sun Gaoqing Xu Yangyunyi Dong Meng Li Lianyu Yang Wenfa Lu Tags: Article Source Type: research
Deep Eutectic Solvent-Based Self-Healing Polymer Electrolyte for Safe and Long-Life Lithium Metal Batteries.
Abstract The deployment of high-energy-density lithium (Li) metal batteries has been greatly impeded by the Li dendrite growth and the safety concerns originating from flammable liquid electrolytes. Herein, we report a stable quasi-solid-state Li metal battery employing a deep eutectic solvent (DES)-based self-healing polymer (DSP) electrolyte. This electrolyte was facilely fabricated via in situ copolymerizing (2-(3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)ureido)ethyl methacrylate) (UPyMA) and pentaerythritol tetraacrylate (PETEA) monomers in a DES-based electrolyte containing fluoroethylene carbonate (FEC) add...
Source: Angewandte Chemie - February 26, 2020 Category: Chemistry Authors: Jaumaux P, Liu Q, Zhou D, Xu X, Wang T, Wang Y, Kang F, Li B, Wang G Tags: Angew Chem Int Ed Engl Source Type: research
Rice grains alleviate cadmium toxicity by expending glutamate and increasing manganese in the cadmium contaminated farmland.
Abstract The accumulation of cadmium (Cd) in rice grains is closely associated with the content of mineral nutrients and amino acid metabolism, but the causal link among them is unclear. Profiles of amino acids (AAs) and quantities of essential nutrients in grains from early and late rice cultivars grown at four sites with different Cd levels were analyzed in the present study. Hazard quotients (HQs) for consumers by intake of rice from late cultivars were much higher than that from early cultivars at sites with soil Cd content of 0.25, 0.61 and 0.84 mg kg-1. Cadmium accumulation in grains resulted in a ...
Source: Environmental Pollution - February 26, 2020 Category: Environmental Health Authors: Yuan K, Wang C, Zhang C, Huang Y, Wang P, Liu Z Tags: Environ Pollut Source Type: research
Dynamic thiol/disulfide homeostasis as indicator of oxidative stress in automotive workers.
Authors: Büyükşekerci M, Gündüzöz M, Özakıncı G, Karataş M, Şenat A, Neşelioğlu S, Erel Ö Abstract Purpose: To examine thiol-disulfide homeostasis auto paintersMaterials and methods: A total of 115 male workers, including 60 auto painters workers and 55 reference group, of the painting and assembly line units respectively, were included in the study. Thiol-disulfide parameters and ischemia-modified albumin (IMA) of groups were determined. Urinary hippuric acid, (HA) phenol, hexanedione, trichloroacetic acid, arsenic and blood lead and manganese were analyzed.Results: The me...
Source: Biomarkers - February 25, 2020 Category: Research Tags: Biomarkers Source Type: research
Manganese-Enhanced Magnetic Resonance Imaging: Application in Central Nervous System Diseases
Manganese-enhanced magnetic resonance imaging (MEMRI) relies on the strong paramagnetism of Mn2+. Mn2+ is a calcium ion analog and can enter excitable cells through voltage-gated calcium channels. Mn2+ can be transported along the axons of neurons via microtubule-based fast axonal transport. Based on these properties, MEMRI is used to describe neuroanatomical structures, monitor neural activity, and evaluate axonal transport rates. The application of MEMRI in preclinical animal models of central nervous system (CNS) diseases can provide more information for the study of disease mechanisms. In this article, we provide a bri...
Source: Frontiers in Neurology - February 25, 2020 Category: Neurology Source Type: research
Novel K/Mn phosphate hydrates, K2Mn3(H2O)2[P2O7]2 and KMn(H2O)2[Al2(PO4)3]: hydrothermal synthesis and crystal chemistry
Two novel K/Mn phosphate hydrates, namely, dipotassium trimanganese dipyrophosphate dihydrate, K2Mn3(H2O)2[P2O7]2, (I), and potassium manganese dialuminium triphosphate dihydrate, KMn(H2O)2[Al2(PO4)3], (II), were obtained in the form of single crystals during a single hydrothermal synthesis experiment. Their crystal structures were studied by X-ray diffraction. Both new compounds are members of the morphotropic series of phosphates with the following formulae: A2M3(H2O)2[P2O7]2, where A = K, NH4, Rb or Na and M = Mn, Fe, Co or Ni, and AM2+(H2O)2[M3+2(PO4)3], where A = Cs, Rb, K, NH4 or (H3O); M2+ = Mn, Fe, Co or Ni; and M3...
Source: Acta Crystallographica Section C - February 25, 2020 Category: Chemistry Authors: Kiriukhina, G.V. Yakubovich, O.V. Shvanskaya, L.V. Kochetkova, E.M. Dimitrova, O.V. Volkov, A.S. Simonov, S.V. Tags: X-ray diffraction crystal structure open framework morphotropic series hydrothermal synthesis aluminophosphate diphosphate feldspar paramagnet research papers Source Type: research
Biochar Modified by Nano-manganese Dioxide as Adsorbent and Oxidant for Oxytetracycline.
Abstract Biochar has limited capacity to adsorb oxytetracycline (OTC). Here we have used bamboo willow biochar (BC) as a carrier to produce nMnO2-loaded biochars (MBC) by a co-precipitation method. Their chemical compositions, morphological features, specific surface area, and surface functional groups were observed or determined. Batch experiments were conducted to assess the effects of reaction time, initial OTC concentrations, pH, salt concentrations, and natural organic matter (NOM) on OTC removal. Kinetics and isotherms indicated that OTC was mainly adsorbed via chemical interactions, and mono- and multi-laye...
Source: Bulletin of Environmental Contamination and Toxicology - February 25, 2020 Category: Environmental Health Authors: Feng L, Yuan G, Xiao L, Wei J, Bi D Tags: Bull Environ Contam Toxicol Source Type: research
Liver Function of Male Rats Exposed to Manganese at Different Time Points.
This study aims to investigate the effects of manganese exposure on serum hepatic enzymes in male rats at different time points. After adaptive feeding for 7 days, male Sprague-Dawley (SD) rats were injected intraperitoneally with 30 mg/kg MnCl2·4H2O once a day for 21 days at zeitgeber time point 2 (ZT2), ZT8, ZT14, and ZT20, respectively. We found that short-term repeated exposure to manganese caused slower body weight gain and increased relative liver and spleen weight index in male rats at different time points. Moreover, serum total bile acid (TBA) increased while aspartate aminotransferase (AST) ...
Source: Biological Trace Element Research - February 25, 2020 Category: Biology Authors: Zhu X, Yang L, He Y, Sun Y, Shi W, Ou C Tags: Biol Trace Elem Res Source Type: research
CR6 interacting factor 1 deficiency induces premature senescence via SIRT3 inhibition in endothelial cells.
Abstract Vascular endothelial cell senescence is an important cause of cardiac-related diseases. Mitochondrial reactive oxygen species (mtROS) have been implicated in cellular senescence and multiple cardiovascular disorders. CR6 interacting factor 1 (CRIF1) deficiency has been shown to increase mtROS via the inhibition of mitochondrial oxidative phosphorylation; however, the mechanisms by which mtROS regulates vascular endothelial senescence have not been thoroughly explored. The goal of this study was to investigate the effects of CRIF1 deficiency on endothelial senescence and to elucidate the underlying mechani...
Source: Free Radical Biology and Medicine - February 25, 2020 Category: Biology Authors: Kim S, Piao S, Lee I, Nagar H, Choi SJ, Shin N, Kim DW, Shong M, Jeon BH, Kim CS Tags: Free Radic Biol Med Source Type: research
Aqueous Manganese-Lead battery for large-scale energy storage
J. Mater. Chem. A, 2020, Accepted Manuscript DOI: 10.1039/D0TA01484B, PaperJianhang Huang, Lei Yan, Duan Bin, Xiaoli Dong, Yonggang Wang, Yong-Yao Xia With increasing interest in energy storage for the grid application, rechargeable battery, as an efficient energy storage/conversion system, has been receiving great attention. However, their development is largely stalled by... The content of this RSS Feed (c) The Royal Society of Chemistry (Source: RSC - J. Mater. Chem. latest articles)
Source: RSC - J. Mater. Chem. latest articles - February 24, 2020 Category: Chemistry Authors: Jianhang Huang Source Type: research
[ASAP] Ligand-Controlled Product Selectivity in Electrochemical Carbon Dioxide Reduction Using Manganese Bipyridine Catalysts
Journal of the American Chemical SocietyDOI: 10.1021/jacs.9b11806 (Source: Journal of the American Chemical Society)
Source: Journal of the American Chemical Society - February 24, 2020 Category: Chemistry Authors: Magnus H. R ønne†, Dasol Cho‡§?, Monica R. Madsen†?, Joakim B. Jakobsen†?, Seunghwan Eom‡§, E´mile Escoude´†, Hans Christian D. Hammershøj†, Dennis U. Nielsen†, Steen U. Pedersen†, Mu-Hyun Baik*‡§, Troels Skrydstrup*†, and Kim Source Type: research
[ASAP] Ni-Doped Layered Manganese Oxide as a Stable Cathode for Potassium-Ion Batteries
ACS Applied Materials& InterfacesDOI: 10.1021/acsami.9b22237 (Source: ACS Applied Materials and Interfaces)
Source: ACS Applied Materials and Interfaces - February 24, 2020 Category: Materials Science Authors: Peilai Bai †, Kezhu Jiang†, Xueping Zhang†, Jialu Xu†, Shaohua Guo*†‡, and Haoshen Zhou†§ Source Type: research
IJERPH, Vol. 17, Pages 1451: Joint Toxicity of a Multi-Heavy Metal Mixture and Chemoprevention in Sprague Dawley Rats
Zhao Chunlan Tang To explore the joint toxicity and bio-accumulation of multi-heavy metals and potential chemoprevention strategies, Male Sprague Dawley (SD) rats (n = 30) were treated orally once a week for six months with 500mg/kg•bw of eight heavy metals which were commonly identified in aquatic products in the Ningbo area including chromium, manganese, nickel, copper, zinc, cadmium, mercury, and lead. At the same time, 200mg/kg•bw of epigallocatechin-3-gallate (EGCG), trisodium citrate dihydrate (TCD) or glutathione (GSH) were administered to evaluate their antagonistic effects against adverse effects o...
Source: International Journal of Environmental Research and Public Health - February 24, 2020 Category: Environmental Health Authors: Yafei Wang Yuqing Tang Zhou Li Qihang Hua Li Wang Xin Song Baobo Zou Min Ding Jinshun Zhao Chunlan Tang Tags: Article Source Type: research
Induction of hepatic portal fibrosis, mitochondria damage, and extracellular vesicle formation in Sprague-Dawley rats exposed to copper, manganese, and mercury, alone and in combination.
In conclusion, Cu, Mn, and Hg alone and as part of a mixture cause cellular damage, inflammation, and fibrosis increasing the risk of associated diseases. PMID: 32091299 [PubMed - as supplied by publisher] (Source: Ultrastructural Pathology)
Source: Ultrastructural Pathology - February 24, 2020 Category: Pathology Authors: Dhanraj P, Venter C, Bester MJ, Oberholzer HM Tags: Ultrastruct Pathol Source Type: research
Metalloimmunology: The metal ion-controlled immunity.
Abstract Metals are essential components in all forms of life required for the function of nearly half of all enzymes and are critically involved in virtually all fundamental biological processes. Especially, the transition metals iron (Fe), zinc (Zn), manganese (Mn), nickel (Ni), copper (Cu) and cobalt (Co) are crucial micronutrients known to play vital roles in metabolism as well due to their unique redox properties. Metals carry out three major functions within metalloproteins: to provide structural support, to serve as enzymatic cofactors, and to mediate electron transportation. Metal ions are also involved in...
Source: Advances in Immunology - February 23, 2020 Category: Allergy & Immunology Authors: Wang C, Zhang R, Wei X, Lv M, Jiang Z Tags: Adv Immunol Source Type: research
Cellular automaton modeling of austenite formation from ferrite plus pearlite microstructures during intercritical annealing of a C-Mn steel
Publication date: Available online 21 February 2020Source: Journal of Materials Science & TechnologyAuthor(s): Chunni Jia, Chengwu Zheng, Dianzhong LiAbstractA mesoscopic cellular automaton model was developed to study the microstructure evolution and solute redistribution of austenization during intercritical annealing of a C-Mn steel. This model enables a depiction of three-stage kinetics of the transformation combined with the thermodynamic analysis: (1) the rapid austenite growth accompanied with pearlite degeneration until the pearlite dissolves completely; (2) the slower austenite growth into ferrite with a rate ...
Source: Journal of Materials Science and Technology - February 22, 2020 Category: Materials Science Source Type: research
Molecules, Vol. 25, Pages 980: Effects of Manganese Porphyrins on Cellular Sulfur Metabolism
e Karl D. Straubg Manganese porphyrins (MnPs), MnTE-2-PyP5+, MnTnHex-2-PyP5+ and MnTnBuOE-2-PyP5+, are superoxide dismutase (SOD) mimetics and form a redox cycle between O2 and reductants, including ascorbic acid, ultimately producing hydrogen peroxide (H2O2). We previously found that MnPs oxidize hydrogen sulfide (H2S) to polysulfides (PS; H2Sn, n = 2&ndash;6) in buffer. Here, we examine the effects of MnPs for 24 h on H2S metabolism and PS production in HEK293, A549, HT29 and bone marrow derived stem cells (BMDSC) using H2S (AzMC, MeRho-AZ) and PS (SSP4) fluorophores. All MnPs decreased intracellular H2S pr...
Source: Molecules - February 22, 2020 Category: Chemistry Authors: Kenneth R. Olson Yan Gao Andrea K. Steiger Michael D. Pluth Charles R. Tessier Troy A. Markel David Boone Robert V. Stahelin Ines Batinic-Haberle Karl D. Straubg Tags: Article Source Type: research
[ASAP] Nature of Reaction Intermediates and Origin of Bifunctionality in Manganese Oxide
The Journal of Physical Chemistry CDOI: 10.1021/acs.jpcc.0c00714 (Source: The Journal of Physical Chemistry C)
Source: The Journal of Physical Chemistry C - February 21, 2020 Category: Chemistry Authors: Indroneil Roy †, Qi Wang†, and Vidhya Chakrapani*†‡ Source Type: research
Fabrication of manganese oxide decorated copper oxide (MnO2/CuO) nanocomposite electrodes for energy storage supercapacitor devices
Publication date: Available online 19 February 2020Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): K. Mohamed Racik, A. Manikandan, M. Mahendiran, P. Prabakaran, J. Madhavan, M. Victor Antony RajAbstractThis paper reports the fabrication of MnO2–CuO nanocomposite by a hydrothermal approach for supercapacitor applications. The crystal nature, morphology and chemical states of synthesized MnO2–CuO nanocomposite were examined by powder XRD, FT-IR, HRSEM, TEM, EDX, XPS and its electrochemical performance of as prepared nanocomposite materials as supercapacitor electrodes is measured by CV, G...
Source: Physica E: Low dimensional Systems and Nanostructures - February 21, 2020 Category: Nanotechnology Source Type: research
Synthesis and Characterization of Photocatalytic MnFe2O4 Nanoparticles
Publication date: 2020Source: Materials Today: Proceedings, Volume 21, Part 4Author(s): Harshal B. Desai, Laxmi J. Hathiya, Hiren H. Joshi, Ashish R. TannaAbstractNanoparticles of manganese ferrite are successfully synthesized by auto combustion technique. The chemical stoichiometry of the sample is checked by Energy Dispersive X-ray (EDAX). The structure of prepared ferrite is confirmed through X-ray Diffraction (XRD) method and is endorsed by Fourier Transform Infrared (FTIR) Spectra. The range of crystallite size is obtained 20-40 nm from Transmission Electron Microscopy (TEM). Photocatalytic dye degradation of methylen...
Source: Materials Today: Proceedings - February 21, 2020 Category: Materials Science Source Type: research
Large room temperature relative cooling power in La0.5Pr0.2Ca0.1Sr0.2MnO3
Publication date: 25 June 2020Source: Journal of Alloys and Compounds, Volume 827Author(s): Ridha Skini, Sagar Ghorai, Petter Ström, Sergey Ivanov, Daniel Primetzhofer, Peter SvedlindhAbstractThe La0.5Pr0.2Ca0.1Sr0.2MnO3 compound has been investigated as a potential candidate for room temperature magnetocaloric refrigeration. The Rietveld refinement of X-ray powder diffraction patterns confirms that the compound crystalizes in an orthorhombic phase with the Pnma space group. Rutherford backscattering spectrometry and time-of-flight elastic recoil detection analysis, verified the desired ratio of the elements in the co...
Source: Journal of Alloys and Compounds - February 20, 2020 Category: Chemistry Source Type: research
The Manganese-Responsive Transcriptional Regulator MumR Protects Acinetobacter baumannii from Oxidative Stress [Molecular Pathogenesis]
Acinetobacter baumannii is an emerging opportunistic pathogen that primarily infects critically ill patients in nosocomial settings. Because of its rapid acquisition of antibiotic resistance, infections caused by A. baumannii have become extremely difficult to treat, underlying the importance of identifying new antimicrobial targets for this pathogen. Manganese (Mn) is an essential nutrient metal required for a number of bacterial processes, including the response to oxidative stress. Here, we show that exogenous Mn can restore A. baumannii viability in the presence of reactive oxygen species (ROS). This restoration is not...
Source: Infection and Immunity - February 20, 2020 Category: Infectious Diseases Authors: Green, E. R., Juttukonda, L. J., Skaar, E. P. Tags: Molecular Pathogenesis Source Type: research
Vibrio cholerae Virulence Activator ToxR Regulates Manganese Transport and Resistance to Reactive Oxygen Species [Molecular Pathogenesis]
In this study, we found that another key virulence regulator, ToxR, was important for V. cholerae resistance to hydrogen peroxide. Through a genome-wide transposon screen, we discovered that a deletion in mneA, which encodes a manganese exporter, restored ROS resistance of the toxR mutant. We then showed that ToxR did not affect mneA transcription but that the ToxR-regulated major porin OmpU was critical for ROS resistance. The addition of manganese in culture medium restored ROS resistance in both the toxR and ompU mutants. Furthermore, elemental analysis indicated that the intracellular concentration of manganese in both...
Source: Infection and Immunity - February 20, 2020 Category: Infectious Diseases Authors: Jiang, H.-h., Zhou, Y., Liu, M., Larios-Valencia, J., Lee, Z., Wang, H., Gao, X.-H., Zhu, J. Tags: Molecular Pathogenesis Source Type: research
Environmental pollutants affecting children's growth and development: Collective results from the MOCEH study, a multi-centric prospective birth cohort in Korea.
CONCLUSION: The collective results from MOCEH study provide strong scientific evidence that exposures to prenatal and postnatal environmental pollutants have a negative effect on growth and development of children, which will be useful in implementing effective national policy to improve children's environmental health. PMID: 32088541 [PubMed - as supplied by publisher] (Source: Environment International)
Source: Environment International - February 20, 2020 Category: Environmental Health Authors: Shah S, Jeong KS, Park H, Hong YC, Kim Y, Kim B, Chang N, Kim S, Kim Y, Kim BN, Kwon H, Bae S, Kim HC, Leem JH, Park EK, Joo H, Park B, Ha M, Ha E Tags: Environ Int Source Type: research
Vault packaged enzyme mediated degradation of amino-aromatic energetic compounds.
In this study, we investigated their degradation by natural manganese peroxidase (nMnP) derived from Phanerochaete chrysosporium and recombinant manganese peroxidase packaged in vaults (vMnP). Encapsulation of manganese peroxidase (MnP) in ribonucleoprotein nanoparticle cages, called vaults, was achieved by creating recombinant vaults in yeast Pichia pastoris. Vault packaging increased the stability of MnP by locally sequestering multiple copies of the enzyme. Within 96 h, both vMnP and nMnP catalyzed over 72% removal of ANT in-vitro, which indicates that vault packaging did not limit substrate diffusion. It was observe...
Source: Chemosphere - February 19, 2020 Category: Chemistry Authors: Lothe AG, Kalra SS, Wang M, Mack EE, Walecka-Hutchison C, Kickhoefer VA, Rome LH, Mahendra S Tags: Chemosphere Source Type: research
Graphene-quantum-dots-induced MnO2 with needle-like nanostructure grown on carbonized wood as advanced electrode for supercapacitors
In this study, PWC was directly produced as a conductive matrix by pyrolyzing natural balsa wood, and then manganese dioxide (MnO2) and graphene quantum dots (GQDs) were deposited to fabricate a PWC/MnO2/GQDs electrode by a hydrothermal method. GQDs significantly boosts the ions transport, and protects MnO2 from falling off both the external surface and inside the channel of PWC. Compared with a PWC/MnO2 electrode, the unique needle-like nanostructures formed by adding GQDs resulted in a better electrochemical performance for a supercapacitor electrode, including a moderate areal specific capacitance (2,712 mF cm&minus...
Source: Carbon - February 19, 2020 Category: Materials Science Source Type: research
In silico Prediction of Protein –Protein Interaction Network Induced by Manganese II in Meyerozyma guilliermondii
Recently, there has been an increasing interest in the use of yeast to produce biosorbent materials, because yeast is economical to use, adaptable to a variety of conditions, and amenable to morphological manipulations to yield better raw biomaterials. Previous studies from our laboratory have shown that Meyerozyma guilliermondii, a non-pathogenic haploid yeast (ascomycete), exhibits excellent biosorption capacity for Mn2+, as demonstrated by kinetic analyses. Shotgun/bottom-up analyses of soluble fractions revealed a total of 1257 identified molecules, with 117 proteins expressed in the absence of Mn2+ and 69 expressed on...
Source: Frontiers in Microbiology - February 19, 2020 Category: Microbiology Source Type: research
Physico-chemical Characterization of hydrochloric acid-treated kaolin clay: An industry approach as a potential catalyst.
This study explains the FT-IR, XRD, XRF, SEM/EDX, TGA, and DSC/DTA characterization of commercially available kaolin clay. The kaolin clay was treated with 4M hydrochloric acid. The objective of this paper is to explore the prominent utilization of kandites clay and useful chemical aspects for modification of kaolin clay minerals. The mineral phase in the presence of chlorite, cristobalite, halloysite, and quartz of kaolin clay was identified by XRD. The FT-IR revealed the functional group of Al-O, A1-OH, and Si-O. Elemental analysis was done by the XRF. The main elements of kaolin clay, SiO2, Al2O3, K2O, Fe2O3, and TiO2 w...
Source: Combinatorial Chemistry and High Throughput Screening - February 19, 2020 Category: Chemistry Authors: Kumar A, Lingfa P Tags: Comb Chem High Throughput Screen Source Type: research
Silica-Supported Manganese(II) Catalyst for Carbonyl Hydrosilylation, Hydroboration, and Transesterification
Synfacts 2020; 16: 0327- DOI: 10.1055/s-0039-1691727 © Georg Thieme Verlag Stuttgart · New YorkArticle in Thieme eJournals: Table of contents | Full text (Source: Synfacts)
Source: Synfacts - February 18, 2020 Category: Chemistry Tags: Polymer-Supported Synthesis Source Type: research
Effect of packing substrates on the purification of municipal wastewater treatment plant effluent.
Abstract The effluents of municipal wastewater treatment plant (WWTP) contain excessive nitrogen and phosphorus compared with the concentration in rivers or lakes. To reduce the pollutant load placed on aqueous environments, constructed wetland (CW) technology has been widely applied to advanced wastewater treatment. Packing substrates in CW could remove various pollutants. Steel slag, yellow earth, kaolin, volcanic rock, anthracite, and ceramsite could effectively remove phosphorus (P); volcanic rock, ceramsite, zeolite, yellow earth, manganese sand, and activated carbon have an affinity for ammonia nitrogen (NH4...
Source: Environmental Science and Pollution Research International - February 18, 2020 Category: Environmental Health Authors: Wan Z, Zhang Y, Lu S, Zhang X, Liu X, Yang Y Tags: Environ Sci Pollut Res Int Source Type: research
Bacterial manganese sensing and homeostasis.
Abstract Manganese (Mn) plays a complex role in the survival of pathogenic and symbiotic bacteria in eukaryotic hosts and is also important for free-living bacteria to thrive in stressful environments. This review summarizes new aspects of regulatory strategies to control intracellular Mn levels and gives an overview of several newly identified families of bacterial Mn transporters. Recent illustrative examples of advances in quantification of intracellular Mn pools and characterization of the effects of Mn perturbations are highlighted. These discoveries help define mechanisms of Mn selectivity and toxicity and c...
Source: Current Opinion in Chemical Biology - February 18, 2020 Category: Biochemistry Authors: Waters LS Tags: Curr Opin Chem Biol Source Type: research
Heterozygous SOD2 deletion deteriorated chronic intermittent hypoxia-induced lung inflammation and vascular remodeling through mtROS-NLRP3 signaling pathway.
In this study, wild-type (WT) and SOD2-heterozygous knockout (SOD2+/-) mice were exposed to CIH or normoxic (Nor) conditions. After 4 weeks, pulmonary artery pressure was measured, and the mice were processed to harvest either serum for cytokine assays or lungs for flow cytometry and histopathological studies. Herein, we showed that heterozygous deletion of SOD2 markedly deteriorated pulmonary remodeling and increased the oxidative stress, especially promoted the infiltration of macrophages in the lungs of CIH mouse. Moreover, in the intermittent hypoxia (IH)-treated RAW264.7 cells, SOD2 knockdown increased the nucleotide-...
Source: Acta Pharmacologica Sinica - February 17, 2020 Category: Drugs & Pharmacology Authors: Song JQ, Jiang LY, Fu CP, Wu X, Liu ZL, Xie L, Wu XD, Hao SY, Li SQ Tags: Acta Pharmacol Sin Source Type: research
Birth outcomes associated with maternal exposure to metals from informal electronic waste recycling in Guiyu, China.
DISCUSSION: We observed slight and statistically significant differences in the head size, BMI, and PI of neonates, but not birth weight, from Guiyu when compared to neonates from Haojiang. Cumulative metal exposure may partially account for the findings. PMID: 32078870 [PubMed - as supplied by publisher] (Source: Environment International)
Source: Environment International - February 17, 2020 Category: Environmental Health Authors: Kim SS, Xu X, Zhang Y, Zheng X, Liu R, Dietrich KN, Reponen T, Xie C, Sucharew H, Huo X, Chen A Tags: Environ Int Source Type: research
Li1.2Ni0.25Mn0.55O2: A high-capacity cathode material with a homogeneous monoclinic Li2MnO3-like superstructure
Publication date: 25 June 2020Source: Journal of Alloys and Compounds, Volume 827Author(s): Zhi-Liang Wu, Hanjie Xie, Yingzi Li, Fangchang Zhang, Zhenyu Wang, Wei Zheng, Mingyang Yang, Zhenghe Xu, Zhouguang LuAbstractHigh-energy lithium-rich and manganese-based layered materials are one of the most promising candidates for the cathode materials of lithium-ion batteries. These cathode materials can deliver anomalously high capacity due to multiple electron transfers involving both cationic and anionic redox processes. An unprecedented homogeneous monoclinic Li2MnO3-like structured material Li1.2Ni0.25Mn0.55O2, which with th...
Source: Journal of Alloys and Compounds - February 15, 2020 Category: Chemistry Source Type: research
Simple manganese carbonyl catalyzed hydrogenation of quinolines and imines
Publication date: Available online 14 February 2020Source: Chinese Chemical LettersAuthor(s): Zelong Wang, Lei Chen, Guoliang Mao, Congyang WangABSTRACTManganese-catalyzed hydrogenation of unsaturated molecules has made tremendous progresses recently on the benefits of non-innocent pincer or bidentate ligands for manganese. Herein, we describe the hydrogenation of quinolines and imines catalyzed by simple manganese carbonyls, Mn2(CO)10 or MnBr(CO)5, thus eliminating the prerequisite pincer-type or bidentate ligands.Graphical abstractEarth-abundant manganese catalysis can now enable hydrogenation of quinolines and imines by...
Source: Chinese Chemical Letters - February 15, 2020 Category: Chemistry Source Type: research
Selective recovery of lithium from geothermal water by EGDE cross-linked spherical CTS/LMO
Publication date: 1 June 2020Source: Chemical Engineering Journal, Volume 389Author(s): Hongshuang Wang, Jinjie Cui, Mingli Li, Yafei Guo, Tianlong Deng, Xiaoping YuAbstractAs a new-type liquid lithium resource, the recovery of lithium from geothermal water is of great significance due to the increasing importance of lithium in modern industry. In this work, different lithium manganese oxides (LMOs), including LiMn2O4, Li1.66Mn1.66O4, and Li4Mn5O12, were synthesized and applied for selective recovery of lithium from geothermal water. It was found that the powdery Li4Mn5O12 exhibits high performances for low concentrations ...
Source: Chemical Engineering Journal - February 15, 2020 Category: Chemistry Source Type: research
Mechanical property development of a 0.15C–6Mn–2Al–1Si third-generation advanced high strength steel using continuous galvanizing heat treatments
Publication date: Available online 15 February 2020Source: Materials Science and Engineering: AAuthor(s): Daniella M. Pallisco, Joseph R. McDermidAbstractThe effects of starting microstructure and intercritical annealing (IA) temperature on the mechanical properties of a prototype 0.15C–6Mn-1.5Al–1Si (wt%) third-generation medium manganese advanced high strength steel (3G AHSS) were determined. The general 3G AHSS mechanical property targets UTS × TE of 24,000–40,000 MPa% were met after a continuous galvanizing line (CGL)-compatible IA treatments at 710 °C and 740 °C for 120 s fr...
Source: Materials Science and Engineering: A - February 15, 2020 Category: Materials Science Source Type: research
Texture formation in face-centered cubic high-entropy alloys
Publication date: 15 June 2020Source: Journal of Alloys and Compounds, Volume 826Author(s): G. Dan Sathiaraj, Aurimas Pukenas, Werner SkrotzkiAbstractHigh-entropy alloys (HEAs) have attracted much attention both from academia and industry mainly because of their particular properties giving hope for future structural and functional applications. As texture leads to an anisotropy of the properties, it is the aim of this paper to present a detailed review on texture evolution in face-centered cubic (FCC) HEAs during thermo-mechanical processing. Key results from published articles provide an up-to-date information regarding ...
Source: Journal of Alloys and Compounds - February 15, 2020 Category: Chemistry Source Type: research
Histopathological, genotoxic, and behavioral damages induced by manganese (II) in adult zebrafish.
L, Gehlen G Abstract Manganese is a metal often found as an environmental pollutant and very associated with neurological disorders when in high concentrations. However, little is known about the effects that this contaminant can cause when in environmentally relevant concentrations and occurrence, that is, much lower than those commonly studied. So, the aim of the study was to evaluate the effects that environmentally relevant concentrations of this metal would cause in different zebrafish organs (brain, liver, and blood). Acute 96-h and chronic 30-day exposures were performed using the manganese chloride salt as...
Source: Chemosphere - February 15, 2020 Category: Chemistry Authors: Zimmermann Prado Rodrigues G, Staudt LBM, Moreira MG, Dos Santos TG, de Souza MS, Lúcio CJ, Panizzon J, Kayser JM, Simões LAR, Ziulkoski AL, Bonan CD, de Oliveira DL, Gehlen G Tags: Chemosphere Source Type: research
Biochar efficacy for reducing heavy metals uptake by Cilantro (Coriandrum sativum) and spinach (Spinaccia oleracea) to minimize human health risk.
Abstract Environmentally friendly and cost-effective techniques are required to reclaim land degraded during mining activities. Bioaccumulation of heavy metals (HMs) in vegetables grown on contaminated soils can increase human health risks. The potential effects of hardwood biochar (HWB) was assessed for chromium (Cr), zinc (Zn), copper (Cu), manganese (Mn) and lead (Pb) bioavailability in mine-contaminated soils and their subsequently bioaccumulation in crops and associated health risk. HWB was applied to chromium-manganese mine contaminated soils at the rate of 3% to investigate the efficiency of HWB for the sec...
Source: Chemosphere - February 15, 2020 Category: Chemistry Authors: Khan AZ, Ding X, Khan S, Ayaz T, Fidel R, Khan MA Tags: Chemosphere Source Type: research
Modeling coupled kinetics of arsenic adsorption/desorption and oxidation in ferrihydrite-Mn(II)/manganese (oxyhydr)oxides systems.
This study provides a modeling framework for predicting the kinetic behavior of As when multiple adsorption/desorption and oxidation reactions are coupled in the environment. PMID: 32050332 [PubMed - in process] (Source: Chemosphere)
Source: Chemosphere - February 15, 2020 Category: Chemistry Authors: You Y, Liang Y, Peng S, Lan S, Lu G, Feng X, Shi Z Tags: Chemosphere Source Type: research