Plasma metals and serum bilirubin levels in workers from manganese-exposed workers healthy cohort (MEWHC).
This study aimed to explore the cross-sectional relationships of plasma metals with liver function parameters. For 571 on-the-spot workers in the manganese-exposed workers healthy cohort (MEWHC), we determined liver function parameters: total bilirubin (TBILI), direct bilirubin (DBILI), indirect bilirubin (IBILI), alanine transaminase (ALT) and aspartate transaminase (AST). Total concentrations of 22 plasma metals were measured by ICP-MS. The LASSO (least absolute shrinkage and selection operator) penalized regression model was applied for selecting plasma metals independently associated with liver function parameters. Mul...
Source: Environmental Pollution - December 4, 2019 Category: Environmental Health Authors: Ge X, Liu Z, Hou Q, Huang L, Zhou Y, Li D, Huang S, Luo X, Lv Y, Li L, Cheng H, Chen X, Zan G, Tan Y, Liu C, Zou Y, Yang X Tags: Environ Pollut Source Type: research

Application and mechanism of manganese-coated caramelization nanospheres for active targeting in hepatobiliary tumors
Nanomedicine, Ahead of Print. (Source: Nanomedicine)
Source: Nanomedicine - December 3, 2019 Category: Nanotechnology Authors: Yafei Qi Wenqin Li Jiayang Fang Ying Xiang Mingquan Zhu Xiaoming Zhang Xiangxing Ma Qing Wang Jinhua Zhan Dexin Yu Source Type: research

Application and mechanism of manganese-coated caramelization nanospheres for active targeting in hepatobiliary tumors
Nanomedicine, Ahead of Print. (Source: Future Medicine: Nanomedicine)
Source: Future Medicine: Nanomedicine - December 3, 2019 Category: Nanotechnology Authors: Yafei Qi Wenqin Li Jiayang Fang Ying Xiang Mingquan Zhu Xiaoming Zhang Xiangxing Ma Qing Wang Jinhua Zhan Dexin Yu Source Type: research

Microbially Mediated Ore-Forming Processes and Cell Mineralization
This study of the Urucum Mn deposit in Brazil is included as a case study for microbially mediated ore-forming processes. The results were compared and interpreted in a comparative way, and the data were elaborated by a complex, structural hierarchical method. The first syngenetic products of microbial enzymatic oxidation were ferrihydrite and lepidocrocite on the Fe side, and vernadite, todorokite, birnessite, and manganite on the Mn side, formed under obligatory oxic (Mn) and suboxic (Fe) conditions and close to neutral pH. Fe- and Mn-oxidizing bacteria played a basic role in metallogenesis based on microtextural feature...
Source: Frontiers in Microbiology - December 3, 2019 Category: Microbiology Source Type: research

Association of dissolved organic matter characteristics and trace metals in mountainous streams with sabo dams.
Abstract Metals undergo various processes transforming from one phase to another during transportation from head streams to oceans. The major chemical processes in the streams and rivers appear to be strongly dependent on dissolved organic matter (DOM). The mutualistic interactions between DOM and metals are important in determining the fate of many elements. We collected surface water samples from four stations along two mountainous streams in 2015 and analysed DOM quality and quantity and metal concentrations with the aim of understanding how changes in DOM characteristics are associated with dissolved metals al...
Source: Environmental Science and Pollution Research International - December 3, 2019 Category: Environmental Health Authors: Praise S, Ito H, Watanabe K, Sasaki A, Watanabe T Tags: Environ Sci Pollut Res Int Source Type: research

Association between long-term occupational manganese exposure and bone quality among retired workers.
Abstract Despite well documents for manganese-induced neurological deficits, limited researches are available for effects of manganese (Mn) exposure on the bone. Here we aimed to explore the associations between long-term occupational Mn exposure and bone quality among retired workers. We conducted a cross-sectional study of 304 exposed subjects (n, male = 161 and female = 143) and 277 control retired workers (n, male = 65 and female = 212) recruited from a ferromanganese refinery. Self-reported occupation types were used as exposure classification confirmed ...
Source: Environmental Science and Pollution Research International - December 3, 2019 Category: Environmental Health Authors: Li D, Ge X, Liu Z, Huang L, Zhou Y, Liu P, Qin L, Lin S, Liu C, Hou Q, Li L, Cheng H, Ou S, Wei F, Shen Y, Zou Y, Yang X Tags: Environ Sci Pollut Res Int Source Type: research

Comparative genomic and metabolic analysis of manganese-oxidizing mechanisms in Celeribacter manganoxidans DY25T: Its adaptation to the environment of polymetallic nodules.
Abstract Manganese (Mn) nodule is one of the ubiquitous polymetallic concretions and mainly consists of Mn - Fe oxi-hydroxide precipitations. A primary oxidation of Mn(II) to MnO2, in which microorganisms may play important roles, is followed by agglomeration of MnO2 into nodules. Celeribater manganoxidans DY25T, belonging to family Rhodobacteraceae, has ability to catalyze the formation of MnO2 [1]. The concentration of MnO2 formed by harvested cells reached 7.08 μM after suspended in 10 mM HEPES (pH 7.5). Genomic and physiological characteristics of strain DY25T provided a better understanding of it...
Source: Genomics - December 3, 2019 Category: Genetics & Stem Cells Authors: Wang X, Yu M, Wang L, Lin H, Li B, Xue C, Sun H, Zhang XH Tags: Genomics Source Type: research

Nickel manganese hydroxides with thin-layer nanosheets and multivalences for high-performance supercapacitor
Publication date: Available online 2 December 2019Source: Results in PhysicsAuthor(s): Hao Liu, Zhongguan Liang, Shaobo Liu, Luomeng Zhang, Hui Xia, Wenke XieAbstractWe propose a simple and effective one-step hydrothermal strategy to prepare various nickel manganese layered double hydroxides (NiMn-LDHs) by changing the concentrations of NiCl2∙6H2O and MnCl2∙4H2O under a fixed molar ratio of Ni to Mn of 3:1. The SEM and TEM results indicate that the obtained NiMn-LDHs are composed of thin-layer nanosheets with well-improved dispersity. Furthermore, the NiMn-LDHs displayed by the XPS analysis contain multivalent Ni and M...
Source: Results in Physics - December 2, 2019 Category: Physics Source Type: research

Manganese ferrite (MnFe 2 O 4 ) as potential nanosorbent for adsorption of uranium(VI) and thorium(IV)
AbstractThe adsorption behavior of U(VI) and Th(IV) metal ions by MnFe2O4 NPs was studied as a function of pH, mass of sorbent, contact time, and temperature. Kinetic data was fitted to Pseudo second-order model andqm reached maximum value at pH 3 for Th(IV) and at pH 3.0 –5.0 for U(VI) after 3 h. The Langmuir, Freundlich, and Dubinin–Raduskevich isotherm equations were applied to the adsorption data and the proper constants were derived. Adsorption isotherms were studied at different temperature to find ΔH°, ΔG°, and ΔS°. Recovery was carried out by using 0.10 M of HNO3,...
Source: Journal of Radioanalytical and Nuclear Chemistry - December 2, 2019 Category: Nuclear Medicine Source Type: research

Should Age at Onset of Parkinsonism be the End Point of Interest in Investigations of the Link Between Exosomal α-Synuclein and Manganese Exposure in Welders?
No abstract available (Source: Journal of Occupational and Environmental Medicine)
Source: Journal of Occupational and Environmental Medicine - December 1, 2019 Category: Occupational Health Tags: LETTERS TO THE EDITOR Source Type: research

Studies on the interactions between nicosulfuron and degradation enzymes
Publication date: Available online 29 November 2019Source: Process BiochemistryAuthor(s): Zhe Zhang, Dongchen Yang, Jiaying Wang, Jingqian Huo, Jinlin ZhangAbstractThe interactions between nicosulfuron and two degradation enzymes (vegetative catalase 1 and manganese ABC transporter) from the Bacillus subtilis YB1 strain were studied and molecular docking simulations and surface plasmon resonance (SPR) were used to research their specific interaction patterns and affinities. The results showed that vegetative catalase 1 and manganese ABC transporter bound specifically to nicosulfuron and that the former binding ability was ...
Source: Process Biochemistry - December 1, 2019 Category: Biochemistry Source Type: research

Protective effect of propolis on Manganese chloride (MnCl2) neurotoxicity of olfactory bulb in adult male albino rat.
In this study forty adult male albino rats were divided randomly into four groups 10 rats each. Group I (control group), group II Manganese Chloride (MnCl2) received 10 mg/kg/day/orally for 4 weeks by intra-gastric tube. Group III (Propolis group) received 50mg/kg/day/orally for 4 weeks by intra-gastric tube and Group IV (MnCl2 +Propolis group) received the same doses with the same duration and route as in groups II and III. Rats were sacrificed after 24 hours of last dose. The olfactory bulbs removed, the right bulb cut to be processed for Haematoxylin and Eosin, immunohistochemical staining and the left cut for electron ...
Source: Folia Morphologica - November 30, 2019 Category: Anatomy Tags: Folia Morphol (Warsz) Source Type: research

Effect of heat processing on the nutrient composition, colour, and volatile odour compounds of the long-horned grasshopper Ruspolia differens Serville
This study aimed at determining the effect of boiling and subsequent oven roasting on Ruspolia differens’ nutrient composition, colour and odor compounds. Boiling leads to: a significant increase in protein and decrease in fat content on a dry matter basis; a minimal influence on its amino and fatty acids profile; a significant reduction in its ash content due to leaching of phosphorus, potassium and sodium; a significant increase in iron, zinc, copper, manganese and calcium content; and a fivefold reduction in the amount of vitamin B12. Roasting leads to a relative increase in the amount of calcium and trace mineral...
Source: Food Research International - November 30, 2019 Category: Food Science Source Type: research

Characterization and photocatalytic application of Ce4+, Co2+, Mn2+ and Ni2+ doped Fe3O4 magnetic nanoparticles obtained by the co-precipitation method
Publication date: 15 February 2020Source: Materials Chemistry and Physics, Volume 242Author(s): N.F. Andrade Neto, L.E. Nascimento, M. Correa, F. Bohn, M.R.D. Bomio, F.V. MottaAbstractIn this work, Ce4+, Co2+, Mn2+ and Ni2+ doped Fe3O4 nanoparticles were obtained by the co-precipitation method at 70 °C. The effects of the metal cations in the Fe3O4 lattice were investigated by X-ray diffraction (XRD), X-ray fluorescence (XRF), field emission scanning electron microscopy (SEM), nitrogen adsorption by the Brunauer-Emmett-Teller (BET) and UV–Visible (UV–Vis) spectroscopy. Magnetic properties were estimate...
Source: Materials Chemistry and Physics - November 28, 2019 Category: Materials Science Source Type: research

Molecular and biochemical investigations of key antioxidant/oxidant molecules in Saudi patients with recurrent miscarriage.
In conclusion, our data highlight a plausible cause-effect association between the observed increase in placental OS level and depletion of the activity of antioxidant enzymes. This suggests that OS is a contributing factor in the pathogenesis of idiopathic RM. PMID: 31772636 [PubMed] (Source: Experimental and Therapeutic Medicine)
Source: Experimental and Therapeutic Medicine - November 28, 2019 Category: General Medicine Tags: Exp Ther Med Source Type: research

The novel cobalt and manganese polymeric complex with the non-steroidal anti-inflammatory drug diclofenac: Synthesis, characterization and antibacterial studies
Publication date: Available online 28 November 2019Source: Journal of Molecular StructureAuthor(s): Fatemeh Ashouri, Ali Reza Faraji, Sogol Molaeian, Mame A. Fall, Raymond J. ButcherAbstractThe novel 3D and 2D cobalt and manganese polymeric complexes with diclofenac ligand (Co-DIC and Mn-DIC) as non-steroidal anti-inflammatory drugs (NSAIDs) were successfully synthesized. The structure analysis by X-ray crystallography exhibited that Co-DIC and Mn-DIC complexes were crystallized in the Monoclinic space group P21/c and Monoclinic space groupC2/c, respectively. Intermolecular hydrogen bonding between adjusted complexes and ...
Source: Journal of Molecular Structure - November 28, 2019 Category: Molecular Biology Source Type: research

Free-standing manganese cobalt sulfide@cobalt nickel layered double hydroxide core-shell heterostructure for asymmetric supercapacitor
Dalton Trans., 2019, Accepted Manuscript DOI: 10.1039/C9DT03974K, PaperHaoyan Liang, Tiesong Lin, Shengyao Wang, H. N. Jia, Chun Li, Jian Cao, Jicai Feng, Weidong Fei, Junlei Qi Rational design of the self-supported electrode materials is an important point to develop high-performance supercapacitor. Herein, a free-standing MnCo2S4@CoNi LDH (MCS@CN LDH) core-shell heterostructure is successfully prepared on Ni foam... The content of this RSS Feed (c) The Royal Society of Chemistry (Source: RSC - Dalton Trans. latest articles)
Source: RSC - Dalton Trans. latest articles - November 28, 2019 Category: Chemistry Authors: Haoyan Liang Source Type: research

Deciphering functional brain circuitry during morphine withdrawal with dynamic manganese-enhanced MRI
Publication date: Available online 26 November 2019Source: Neuroscience LettersAuthor(s): Wenheng FangAbstractWithdrawal plays a key role in the development of addiction, and several brain regions, such as the extended amygdala, are functional during this stage. Manganese-enhanced magnetic resonance imaging (MEMRI) is a promising method for directly studying neural activity during morphine withdrawal, versus functional MRI, which is based on hemodynamic alterations. The functional brain circuitry associated with morphine withdrawal has not been thoroughly investigated, and there are very few longitudinal studies utilizing ...
Source: Neuroscience Letters - November 27, 2019 Category: Neuroscience Source Type: research

Hybrid manganese dioxide-bovine serum albumin nanostructure incorporated with doxorubicin and IR780 for enhanced breast cancer chemo-photothermal therapy.
Authors: Yuan X, Yin Y, Zan W, Sun X, Yang Q Abstract The therapeutic outcome of chemotherapy is limited, although it is still the preferent strategy for cancer therapy. By regulation of tumor microenvironment and introduction of another therapeutic manner for combination therapy can enhance the anticancer activity of chemotherapeutics. Herein, we have constructed a hybrid nanostructure which composed of manganese dioxide (MnO2) and doxorubicin (DOX) as well as IR780 by stabilizing with BSA (BMDI) in one-pot procedure to alleviate tumor hypoxia and enhance tumor growth inhibition. The MnO2 can react with H2O2 to ge...
Source: Drug Delivery - November 27, 2019 Category: Drugs & Pharmacology Tags: Drug Deliv Source Type: research

Waste minimized synthesis of pharmaceutically active compounds via heterogeneous manganese catalysed C –H oxidation in flow
Green Chem., 2019, Accepted Manuscript DOI: 10.1039/C9GC02961C, PaperLuigi Vaccaro, Francesco Ferlin, Daniela Lanari, Pilar Maria Luque Navarro, Yanlong Gu Herein we present our results on the development of a continuous flow protocol enabling the waste minimised synthesis of relevant pharmaceuticals and natural compounds. Manganese heterogeneous catalytic systems have been... The content of this RSS Feed (c) The Royal Society of Chemistry (Source: RSC - Green Chem. latest articles)
Source: RSC - Green Chem. latest articles - November 27, 2019 Category: Chemistry Authors: Luigi Vaccaro Source Type: research

The essential role of niobium in high manganese austenitic steel for application in liquefied natural gas tanks
Publication date: Available online 26 November 2019Source: Materials Science and Engineering: AAuthor(s): Jun Chen, Jia-kuan Ren, Zhen-yu Liu, Guo-dong WangAbstractFive high manganese austenitic steels with different niobium additions were designed, and the essential role of niobium in high manganese austenitic steel has been elucidated by means of electron back-scatter diffraction, transmission electron microscopy, high-angle annular dark-field scanning transmission electron microscopy. Regardless of niobium content, NbC carbides can be formed during hot rolling in the temperature range of 1100-970 °C, whereas these...
Source: Materials Science and Engineering: A - November 27, 2019 Category: Materials Science Source Type: research

The formability of twinning—Induced plasticity steels predicted on the base of Marciniak-Kuczynski theory
Publication date: Available online 13 November 2019Source: Journal of Materials Processing TechnologyAuthor(s): Marilena C. Butuc, Frederic Barlat, Gabriela VinczeAbstractThe purpose of this work is to predict and analyze the formability of twinning – induced plasticity steels through the Marciniak-Kuczynski (MK) theory with emphasis on the solutions for improving the prediction results. The selected constitutive equations involve the Yld00-2d of Barlat et al. (2003) plane stress yield function, the Swift strain–hardening power law and the dislocation density based constitutive model proposed by Kim et al. (201...
Source: Journal of Materials Processing Technology - November 27, 2019 Category: Materials Science Source Type: research

Chapter Twelve - Parkinsonism in diseases predominantly presenting with dystonia
Publication date: 2019Source: International Review of Neurobiology, Volume 149Author(s): Alessio Di Fonzo, Giulia Franco, Paolo Barone, Roberto ErroAbstractIf the presence of dystonia is a well-recognized phenomenon in disorders predominantly presenting with parkinsonism, including sporadic Parkinson Disease, the term dystonia-parkinsonism usually refers to rare conditions, often genetic, in which the severity of dystonia usually equates that of parkinsonism. At variance with parkinsonian syndromes with additional dystonia, the conditions reviewed in this chapter have usually their onset in childhood and their diagnostic w...
Source: International Review of Neurobiology - November 27, 2019 Category: Neuroscience Source Type: research

Mixtures of aromatic compounds induce ligninolytic gene expression in the wood-rotting fungus Dichomitus squalens
This study suggests potential for aromatic waste streams, e.g. from lignocellulose pretreatment, to produce a lignin-specific enzyme cocktail from D. squalens or other white-rot fungi. (Source: Journal of Biotechnology)
Source: Journal of Biotechnology - November 26, 2019 Category: Biotechnology Source Type: research

Syntheses, molecular structures, and spectroscopic properties of manganese(II)/(III) complexes with tetraphenylimidodiphosphinato and bi-pyridine or salicylaldehyde ligands
Publication date: Available online 25 November 2019Source: Inorganica Chimica ActaAuthor(s): Zhe Qian, Ying Zhang, Ai-Quan Jia, Hua-Tian Shi, Qian-Feng ZhangAbstractTreatment of [Mn(CH3COO)2∙4H2O] with two equivalents of K[N(Ph2PO)2] in the presence of one equivalent of 2,2′-bipyridine (bpy) or 5,5'-dimethyl-2,2'-bipyridine(dmbpy) in ethanol resulted in the formation of the mono-nuclear manganese(II) complexes [Mn{η1-O-N(Ph2PO)2}{N(Ph2PO)2}(EtOH)(bpy)] (1) and [Mn{N(Ph2PO)2}2(dmbpy)] (2), respectively. Interaction of [Mn(CH3COO)2∙4H2O], K[N(Ph2PO)2] and salicylaldehyde or 5-chlorosalicylaldehyde or 3,5-dibrom...
Source: Inorganica Chimica Acta - November 26, 2019 Category: Chemistry Source Type: research

PSA targeted dual-modality manganese oxide–mesoporous silica nanoparticles for prostate cancer imaging
Publication date: January 2020Source: Biomedicine & Pharmacotherapy, Volume 121Author(s): Dou Du, Hui-Jun Fu, Wei-wei Ren, Xiao-Long Li, Le-Hang GuoAbstractStudies have shown the potential of nanomaterials for the accurate and early detection of cancer. The aim of the present study was to design and evaluate the value of prostate-specific membrane antigen (PSA)-targeted manganese oxide–mesoporous silica nanoparticles (Mn–Msns) for the detection of prostate cancer. Mn–Msns were prepared, and then conjugated with the PSA antibody and Cy7 to create the multimodality PSA-Mn-Msn-Cy7. Their particle size, z...
Source: Biomedicine and Pharmacotherapy - November 26, 2019 Category: Drugs & Pharmacology Source Type: research

[ASAP] Manganese(II) in Tetrahedral Halide Environment: Factors Governing Bright Green Luminescence
Chemistry of MaterialsDOI: 10.1021/acs.chemmater.9b03782 (Source: Chemistry of Materials)
Source: Chemistry of Materials - November 26, 2019 Category: Materials Science Authors: Viktoriia Morad †‡, Ihor Cherniukh†‡, Lena Po¨ttschacher†, Yevhen Shynkarenko†‡, Sergii Yakunin†‡, and Maksym V. Kovalenko*†‡ Source Type: research

Characterization of a Dimeric Arginase From Zymomonas mobilis ZM4
Many organisms have genes to protect themselves from toxic conditions such as high ethanol and/or ammonia concentrations. When a high ethanol condition is induced to Zymomonas mobilis ZM4, a representative ethanologenic organism, this bacterium overexpresses several genes to overcome this ethanol stress. Among them, we characterized a gene product annotated as an arginase (zmARG) from Z. mobilis ZM4. Even though all of the arginase-determining sequence motifs are not strictly conserved in zmARG, this enzyme converts L-arginine to urea and L-ornithine in the presence of a divalent manganese ion. The revealed high-resolution...
Source: Frontiers in Microbiology - November 26, 2019 Category: Microbiology Source Type: research

Probabilistic health risk assessment of heavy metals at wastewater discharge points within the Vaal River Basin, South Africa.
This study focused on assessing potential health risks for humans exposed to concentrations of heavy metals in river systems that receive effluents from wastewater treatment plants in the Maluti-a-Phofung municipality. Untreated influents and treated effluents from two plants, one in the town of Phuthaditjhaba, the other in the town of Harrismith, were analysed for heavy metals. Water samples were also collected from the Elands and the Wilge Rivers, which receive effluents from the treatment plants in Phuthaditjhaba and Harrismith, respectively. All samples were analysed for heavy metals; Iron (Fe), Magnesium (Mg), Mangane...
Source: International Journal of Hygiene and Environmental health - November 26, 2019 Category: Environmental Health Authors: Moloi M, Ogbeide O, Voua Otomo P Tags: Int J Hyg Environ Health Source Type: research

The role of iron in Parkinson's disease monkeys assessed by susceptibility weighted imaging and inductively coupled plasma mass spectrometry
Publication date: Available online 21 November 2019Source: Life SciencesAuthor(s): Shao-Jun Li, Yan-De Ren, Jin Li, Bin Cao, Chi Ma, Shan-Shan Qin, Xiang-Rong LiAbstractMounting evidences indicated that elevated iron levels in the substantia nigra (SN) have been concerned as the underlying mechanisms of neurodegenerative diseases, including Parkinson's disease (PD). The present study used the 1-Methyl-4-phenyl-1, 2, 3, 6 -tetrahydropyridine (MPTP)-treated cynomolgus monkeys for PD to evaluate the usability of SWI for assessing iron deposition in the cerebral nuclei of PD. The results showed that susceptibility-weighted ima...
Source: Life Sciences - November 25, 2019 Category: Biology Source Type: research

Microstructure and dynamic tensile characteristics of dissimilar fiber laser welded advanced high strength steels
Publication date: Available online 24 November 2019Source: Materials Science and Engineering: AAuthor(s): M.H. Razmpoosh, A. Macwan, E. Biro, Y. ZhouAbstractThe desire for production of anti-crash weight-optimized modern vehicles has resulted in the development of tailor welded blanks (TWBs) of 3rd-generation advanced high strength steels (3G-AHSSs). Therefore, understanding crash response (dynamic loading: strain rate of 1-100 s−1) of TWBs is essential for deploying new classes of AHSSs. The present work investigates dissimilar fiber laser joints between press-hardened 22MnB5 steel - medium manganese transformation ...
Source: Materials Science and Engineering: A - November 25, 2019 Category: Materials Science Source Type: research

Rational designing of porous structured nickel manganese sulfides hexagonal sheets-in-cage structures as an advanced electrode material for high-performance electrochemical capacitors.
Abstract The design of hierarchical electrode comprising multiple components with a high electrical conductivity and a large specific surface area has been recognized as a feasible strategy to remarkably boost pseudocapacitors. Herein, we delineate hexagonal sheets-in-cage shaped nickel-manganese sulfides (Ni-Mn-S) with nanosized open spaces for supercapacitors application to realize faster redox reactions and a lower charge transfer resistance with a markedly enhanced specific capacitance. The hybrid was facilely prepared through a two-step hydrothermal method. Benefiting from the synergistic effect between Ni an...
Source: Chemistry - November 25, 2019 Category: Chemistry Authors: Khalafallah D, Wu Z, Zhi M, Hong Z Tags: Chemistry Source Type: research

Dissolution of pure chalcopyrite with manganese nodules and waste water
Publication date: Available online 23 November 2019Source: Journal of Materials Research and TechnologyAuthor(s): Norman Toro, Kevin Pérez, Manuel Saldaña, Ricardo I. Jeldres, Matías Jeldres, Manuel CánovasAbstractChalcopyrite is the most abundant copper ore and, consequently, the most utilised to produce metallic copper. The main route of treatment is through pyrometallurgical processes, but these emit significant quantities of SO2 into the atmosphere (e.g. 182,000 t/year among all Chilean smelters), producing mighty concern in the community. In this context, hydrometallurgy is presented as an ...
Source: Journal of Materials Research and Technology - November 24, 2019 Category: Materials Science Source Type: research

Mechanical response of a medium manganese steel with encapsulated austenite
Publication date: 15 March 2020Source: Scripta Materialia, Volume 178Author(s): Yong Li, Wei Li, Na Min, Wenqing Liu, Caiyi Zhang, Xuejun JinAbstractEncapsulated microstructures of austenite and co-precipitates were formed using a designed tempering and double partitioning (TDP) heat treatment based on the precipitation-induced localized austenite reversion in a medium manganese (Mn) steel. The retained austenite in TDP steel showed better mechanical stability due to the preferable coherency of austenite/ferrite interfaces and a greater capability of geometrically necessary dislocations (GNDs) accommodation. The outstandin...
Source: Scripta Materialia - November 24, 2019 Category: Materials Science Source Type: research

Fabrication and theoretical investigation of cobaltosic sulfide nanosheets for flexible aqueous Zn/Co batteries
Publication date: Available online 22 November 2019Source: Nano EnergyAuthor(s): Si-Wen Zhang, Bo-Si Yin, Yong-Zheng Luo, Lei Shen, Bao-Shan Tang, Zongkui Kou, Xixia Liu, David-Boon-Kiang Lim, Da-Ming Gu, Zhen-Bo Wang, Hao GongABSTRACTFlexible and recyclable zinc-based batteries have been hot research topics due to their high discharge platform, safety, and low cost. However, most research on zinc-based batteries put their attention on metal oxides as the cathode, such as manganese dioxide (MnO2), cobaltosic oxide (Co3O4), nickel oxide (NiO), etc. Very few studies use metal sulfides as electrode materials and focus on its ...
Source: Nano Energy - November 23, 2019 Category: Nanotechnology Source Type: research

Parkinsonism in diseases predominantly presenting with dystonia
Publication date: Available online 21 November 2019Source: International Review of NeurobiologyAuthor(s): Alessio Di Fonzo, Giulia Franco, Paolo Barone, Roberto ErroAbstractIf the presence of dystonia is a well-recognized phenomenon in disorders predominantly presenting with parkinsonism, including sporadic Parkinson Disease, the term dystonia-parkinsonism usually refers to rare conditions, often genetic, in which the severity of dystonia usually equates that of parkinsonism. At variance with parkinsonian syndromes with additional dystonia, the conditions reviewed in this chapter have usually their onset in childhood and t...
Source: International Review of Neurobiology - November 22, 2019 Category: Neuroscience Source Type: research

Manganese-Catalyzed Cascade Annulations of Alkyne-Tethered N-Alkoxyamides: Synthesis of Polycyclic Isoquinolin-1(2H)-ones
Org. Biomol. Chem., 2019, Accepted Manuscript DOI: 10.1039/C9OB02364J, CommunicationGui-Xian Kong, Jiao-Na Han, Dandan Yang, Jun-Long Niu, Mao-Ping Song A strategy for the synthesis of isoxazolidine/1,2-oxazinane-fused isoquinolin-1(2H)ones from alkyne-tethered N-alkoxyamides is described, in which cheap Mn(acac)2 is used as catalyst to facilitate a radical cascade annulation. The method features... The content of this RSS Feed (c) The Royal Society of Chemistry (Source: RSC - Organic and Biomolecular Chemistry)
Source: RSC - Organic and Biomolecular Chemistry - November 22, 2019 Category: Molecular Biology Authors: Gui-Xian Kong Source Type: research

Effect of Water and Alkali-ion content on the Structure of Manganese(II) Hexacyanoferrate(II) by a Joint Operando XAS-Chemometric Approach.
Abstract Manganese hexacyanoferrate (MnHCF) is made of abundant elements via a safe and easy synthesis. The material features higher specific capacity at higher potential when compared to other Prussian blue analogs (PBAs). However, the effect of hydration is critical in determining the electrochemical performance, since both the electrochemical behavior and the reaction dynamics are affected by interstitial/structural water and adsorbed water. Here we investigate the electrochemical activity of MnHCF by varying the interstitial ion content through a joint operando XAS (x-ray absorption spectroscopy) - chemometric...
Source: ChemSusChem - November 22, 2019 Category: Chemistry Authors: Mullaliu A, Aquilanti G, Conti P, Giorgetti M, Passerini S Tags: ChemSusChem Source Type: research

Surface characteristics and catalytic activity of modified rare earth concentrate for low-temperature selective catalytic reduction of NOx with NH3
Publication date: 15 February 2020Source: Materials Chemistry and Physics, Volume 242Author(s): Kai Zhang, Yue Ge, Jinhao Zhu, Na Li, Huijuan Luo, Baowei Li, Zengwu Zhao, Wenfei WuAbstractThe surface properties of the modified rare earth concentrate supported by γ-Al2O3 and the factors affecting the catalytic activity were studied. Roasting and NaHCO3-oxalic acid leaching were used to study on surface properties of modified rare earth concentrates. The effects of modification treatment on the microstructure and catalytic activity of the impurity-removed samples were characterized by XRD, BET, TPD, TPR, XPS, in-situ D...
Source: Materials Chemistry and Physics - November 21, 2019 Category: Materials Science Source Type: research

Microstructural characterization of the protective oxide scale forming on Ni–25Cr–xMn (x = 0.5, 1 and 1.5% wt) in a 200 Pa O2 environment at 1050 °C
Publication date: 15 March 2020Source: Scripta Materialia, Volume 178Author(s): T. Perez, J. Ghanbaja, S. Mathieu, L. Latu-Romain, M. Vilasi, Y. WoutersAbstractTo clarify the influence of manganese on the oxidation behavior of Ni–Cr alloys, high resolution transmission electron microscopy was used to examine the microstructure and chemistry of oxide scales forming at 1050 °C on Ni–25Cr–xMn (x = 0.5, 1 and 1.5% wt) in 200 Pa O2. The scales consisted of two layers of chromia and one layer of spinel Mn1+xCr2-xO4. The internal layer exhibited an equiaxed grain structure, whereas column...
Source: Scripta Materialia - November 21, 2019 Category: Materials Science Source Type: research

Antioxidative system of Deinococcus radiodurans
Publication date: Available online 19 November 2019Source: Research in MicrobiologyAuthor(s): Hui-zhou Qi, Wu-zhou Wangi, Jun-yan He, Yun Ma, Fang-zhu Xiao, Shu-ya HeAbstractDeinococcus radiodurans is famous for its extreme resistance to various stresses such as ionizing radiation (IR), desiccation and oxidative stress. The underlying mechanism of exceptional resistance of this robust bacterium still remained unclear. However, the antioxidative system of D. radiodurans has been considered to be the determinant factor for its unparalleled resistance and protects the proteome during stress, then the DNA repair system and met...
Source: Research in Microbiology - November 21, 2019 Category: Microbiology Source Type: research

Assessment of nephrotoxicity of herbal medicine containing aristolochic acid in mice.
Conclusions: The nephrotoxic potential of HM containing AA was similar to that of AA itself. PMID: 31739654 [PubMed - as supplied by publisher] (Source: The Korean Journal of Internal Medicine)
Source: The Korean Journal of Internal Medicine - November 21, 2019 Category: Internal Medicine Authors: Quan Y, Jin L, Luo K, Jin J, Lim SW, Shin YJ, Ko EJ, Chung BH, Yang CW Tags: Korean J Intern Med Source Type: research

MnTBAP reduces pulmonary vascular remodeling in experimental pulmonary arterial hypertension
Conclusion: MnTBAP treatment can partly reverse RV afterload and pulmonary vascular remodeling in established experimental PAH. Together with the improved cardiac function, MnTBAP may be a promising intervention for PAH. (Source: European Respiratory Journal)
Source: European Respiratory Journal - November 21, 2019 Category: Respiratory Medicine Authors: Sun, X.-Q., Gomez-Puerto, M. C., Schalij, I., Vonk-Noordegraaf, A., De Man, F. S., Ten Dijke, P., Bogaard, H.-J. Tags: Pulmonary hypertension Source Type: research

Characteristics of heavy metal concentrations and risk assessment for giant pandas and their habitat in the Qinling Mountains, China.
Abstract High concentrations of heavy metals in the environment threaten the quality of ecosystems and the health of human beings and animals. Giant panda (Ailuropoda melanoleuca), which is endemic to China and a global conservation icon, has the largest density in the Qinling Mountains. This paper investigated the spatiotemporal variation of heavy metal concentrations in soil (N = 44) at the regional scale with three zones of urban areas, mountain edges, and central mountains, the temporal variation of heavy metal concentrations in three bamboo species (N = 19) and two types of feces (N = 10), and assessed the ec...
Source: Environmental Science and Pollution Research International - November 21, 2019 Category: Environmental Health Authors: Tian Z, Liu X, Sun W, Ashraf A, Zhang Y, Jin X, He X, He B Tags: Environ Sci Pollut Res Int Source Type: research

Nickel-Catalyzed Reductive Coupling for Transforming Unactivated Aryl Electrophiles into β-Fluoroethylarenes.
We report herein a facile synthetic method for converting unactivated (hetero)aryl electrophiles into β-fluoroethylated (hetero)arenes via nickel-catalyzed reductive cross-couplings. This coupling reaction features the involvement of FCH2CH2 radical intermediate rather than β-fluoroethyl manganese species which provides effective solutions to the problematic β-fluoride side eliminations. The practical value of this protocol is further demonstrated by the late-stage modification of several complex ArCl or ArOH-derived bioactive molecules. PMID: 31755237 [PubMed - as supplied by publisher] (Source: Chemis...
Source: Chemistry, an Asian Journal - November 21, 2019 Category: Chemistry Authors: Yang Y, Luo G, Li Y, Tong X, He M, Zeng H, Jiang Y, Liu Y, Zheng Y Tags: Chem Asian J Source Type: research

A novel smartphone-based CD-spectrometer for high sensitive and cost-effective colorimetric detection of ascorbic acid.
Abstract As a powerful tool for medical diagnosis and bioanalysis, conventional optical spectrometers are generally expensive, bulky and always require an accompanying data processing device. In this work, we developed a novel smartphone-based CD-spectrometer (SCDS) for high sensitive and ultra-portable colorimetric analysis, with the advantage of cost-effective and simplicity. The distance between the light source and slit, the structure of SCDS and the parameters of camera in the smartphone were all optimized to ensure the best analytical performance. Besides, the SCDS employed HSV color model and utilized the o...
Source: Analytica Chimica Acta - November 20, 2019 Category: Chemistry Authors: Kong L, Gan Y, Liang T, Zhong L, Pan Y, Kirsanov D, Legin A, Wan H, Wang P Tags: Anal Chim Acta Source Type: research

Daily exposure to toxic metals through urban road dust from industrial, commercial, heavy traffic, and residential areas in Petaling Jaya, Malaysia: a health risk assessment.
Abstract Human health is threatened by significant emissions of heavy metals into the urban environment due to various activities. Various studies describing health risk analyses on soil and dust have been conducted previously. However, there are limited studies that have been carried out regarding the potential health risk assessment of heavy metals in urban road dust of
Source: Environmental Science and Pollution Research International - November 20, 2019 Category: Environmental Health Authors: Shabanda IS, Koki IB, Low KH, Zain SM, Khor SM, Abu Bakar NK Tags: Environ Sci Pollut Res Int Source Type: research

Uptake Prediction of Ten Heavy Metals by Eruca sativa Mill. Cultivated in Soils Amended with Sewage Sludge.
This study was carried out to develop mathematical regression equations for predicting the uptake of ten heavy metals (HMs) (cadmium, Cd; cobalt, Co; chromium, Cr; copper, Cu; iron, Fe; manganese, Mn; molybdenum, Mo; nickel, Ni; lead, Pb; zinc, Zn) by a vegetable species (Eruca sativa Mill.) in the Abha region (Saudi Arabia) based on the concentration of these HMs in soils amended with sewage sludge, organic matter (OM) content and soil pH. The resultant regression equations indicated that the three soil factors were significant predictors for the uptake of the ten HMs in the plant tissues. By applying a t test, we found t...
Source: Bulletin of Environmental Contamination and Toxicology - November 20, 2019 Category: Environmental Health Authors: Eid EM, Shaltout KH, Abdallah SM, Galal TM, El-Bebany AF, Sewelam NA Tags: Bull Environ Contam Toxicol Source Type: research

Reference values for trace essential elements in the whole blood and serum samples of the adult Serbian population: significance of selenium deficiency.
This study was aimed to determine reference values (RVs) for the manganese (Mn), copper (Cu), zinc (Zn), and selenium (Se) in the whole blood (B) and serum (S) samples of the Serbian population. Blood specimens were collected from healthy persons (n = 295; women/men ratio = 149/146; mean age: 42 ± 2 years). The RVs were calculated as lower limit (LL) and upper limit (UL) of the 95% confidence interval (CI) and were expressed as percentiles (P) in the range from P2.5 to P97.5. The influences of sex, age, and smoking habits on element profiles were considered. It was found that the contents of B-Cu and S-Cu were highe...
Source: Environmental Science and Pollution Research International - November 20, 2019 Category: Environmental Health Authors: Stojsavljević A, Jagodić J, Vujotić L, Borković-Mitić S, Rašić-Milutinović Z, Jovanović D, Gavrović-Jankulović M, Manojlović D Tags: Environ Sci Pollut Res Int Source Type: research

Co-recovery of manganese from pyrolusite and gold from carbonaceous gold ore using fluidized roasting coupling technology
Publication date: Available online 17 November 2019Source: Chemical Engineering and Processing - Process IntensificationAuthor(s): Hao Wu, Yali Feng, Haoran Li, Hongjun Wang, Jinrong JuAbstractRoasting pre-treatment is a necessary process for recovering pyrolusite and carbonaceous gold ore. In order to reduce energy consumption and make full use of the carbon component in carbonaceous gold ore, the gold ore was used as the reductant in pyrolusite processing. Based on the fluidized roasting coupling technology, the roasting process of reducing pyrolusite with carbonaceous gold ore was investigated. Co-recovery of manganese ...
Source: Chemical Engineering and Processing: Process Intensification - November 19, 2019 Category: Chemistry Source Type: research