Manganese-Catalyzed Enantioselective Hydrogenation of Simple Ketones Using an Imidazole-Based Chiral PNN Tridentate Ligand
Synlett DOI: 10.1055/s-0039-1690783 A series of Mn(I) catalysts containing imidazole-based chiral PNN tridentate ligands with controllable ‘side arm’ groups have been established, enabling the inexpensive base-promoted asymmetric hydrogenation of simple ketones with outstanding activities (up to 8200 TON) and good enantioselectivities (up to 88.5% ee). This protocol features wide substrate scope and functional group tolerance, thereby providing easy access to a key intermediate of crizotinib. [...] © Georg Thieme Verlag Stuttgart · New YorkArticle in Thieme eJournals: Table of contents &nb...
Source: Synlett - January 10, 2020 Category: Chemistry Authors: Ling, Fei Chen, Jiachen Nian, Sanfei Hou, Huacui Yi, Xiao Wu, Feifei Xu, Min Zhong, Weihui Tags: letter Source Type: research

Study on Trace Elements Concentration in Medicinal Plants Using EDXRF Technique.
Abstract Ten medicinal plants used as ingredients of folklore and Ayurvedic medicine belonging to the Malnad Kerala region of South India, were analysed for concentrations of trace elements Fe, Cr, Mn, Co, Ni, Cu, Zn, As, and Pb using the Energy Dispersive X-ray Fluorescence (EDXRF) technique. The soil from the root area of these medicinal plants was also analysed, and the soil to plant transfer factor (TF) of the elements was estimated. Iron (Fe) recorded higher concentration than the other trace elements estimated in the medicinal plants, followed by manganese (Mn) and zinc (Zn). The mean TF was found to be high...
Source: Biological Trace Element Research - January 10, 2020 Category: Biology Authors: Kulal C, Padhi RK, Venkatraj K, Satpathy KK, Mallaya SH Tags: Biol Trace Elem Res Source Type: research

The effects of mild closed head injuries on tauopathy and cognitive deficits in rodents: Primary results in wild type and rTg4510 mice, and a systematic review.
Abstract In humans, the majority of sustained traumatic brain injuries (TBIs) are classified as 'mild' and most often a result of a closed head injury (CHI). The effects of a non-penetrating CHI are not benign and may lead to chronic pathology and behavioral dysfunction, which could be worsened by repeated head injury. Clinical-neuropathological correlation studies provide evidence that conversion of tau into abnormally phosphorylated proteotoxic intermediates (p-tau) could be part of the pathophysiology triggered by a single TBI and enhanced by repeated TBIs. However, the link between p-tau and CHI in rodents rem...
Source: Experimental Neurology - January 10, 2020 Category: Neurology Authors: Bachstetter AD, Morganti JM, Bodnar CN, Webster SJ, Higgins EK, Roberts KN, Snider H, Meier SE, Nation GK, Goulding DS, Hamm M, Powell DK, Vandsburger M, Van Eldik LJ, Abisambra JF Tags: Exp Neurol Source Type: research

Leishmanicidal activity of ibuprofen and its complexes with Ni (II), Mn(II) and Pd(II)
In this study, nickel (II), manganese (II), and palladium (II) coordination compounds with ibuprofen were synthesized, and their potential leishmanicidal activity was evaluated. The compounds were characterized by molar conductimetry, electronics spectroscopy, infrared vibrational spectroscopy, 13C NMR, and elemental analysis, and the data were compared with literature. Comparison of the leishmanicidal activity of these compounds against promastigotes of Leishmania amazonensis and the cytotoxicity against lung fibroblast cells indicated that the IbuNi (nickel ibuprofen complex) compound was promising because it had the hig...
Source: Inorganic Chemistry Communications - January 9, 2020 Category: Chemistry Source Type: research

A new synthesis of porphyrins via a putative trans-manganese(IV)-dihydroxide intermediate
Dalton Trans., 2020, Advance Article DOI: 10.1039/C9DT03573G, PaperSruti Mondal, Kasturi Sahu, Bratati Patra, Subhrakant Jena, Himansu S. Biswal, Sanjib Kar An efficient, milder (occurs at RT), scalable, and environmentally benign methodology for the facile synthesis of porphyrin derivatives without using quinone based oxidants has been developed. To cite this article before page numbers are assigned, use the DOI form of citation above. The content of this RSS Feed (c) The Royal Society of Chemistry (Source: RSC - Dalton Trans. latest articles)
Source: RSC - Dalton Trans. latest articles - January 9, 2020 Category: Chemistry Authors: Sruti Mondal Source Type: research

A high voltage aqueous zinc-manganese battery using hybrid alkaline-mild electrolyte
Chem. Commun., 2020, Accepted Manuscript DOI: 10.1039/C9CC08604H, CommunicationWeijia Fan, Fei Liu, Yu Liu, Zhixian Wu, Lili Wang, Yi Zhang, Qinghong Huang, Lijun Fu, Yuping Wu A high-voltage aqueous zinc-manganese battery using alkaline-mild hybrid electrolyte is reported. The operation voltage of the battery can reach 2.2 V. The energy density is 487 Wh kg-1 at 200... The content of this RSS Feed (c) The Royal Society of Chemistry (Source: RSC - Chem. Commun. latest articles)
Source: RSC - Chem. Commun. latest articles - January 9, 2020 Category: Chemistry Authors: Weijia Fan Source Type: research

Effect of simultaneous electrochemical deposition of manganese hydroxide and polypyrrole on structure and capacitive behavior
Publication date: Available online 7 January 2020Source: Journal of Electroanalytical ChemistryAuthor(s): Tamene Tamiru Debelo, Masaki UjiharaAbstractNanocomposite electrodes were prepared by single-phase galvanostatic electrodeposition on a stainless-steel mesh in an aqueous solution of manganese nitrate and pyrrole. On the anode, the deposited film (anodic film) was composed of spherical particle aggregates of almost pure polypyrrole, which strongly adhered to the stainless steel. In contrast, highly porous nanosheets of Mn(OH)2 effectively formed on the cathode and became Mn oxides with a trace of carbon material after ...
Source: Journal of Electroanalytical Chemistry - January 8, 2020 Category: Chemistry Source Type: research

Synthesis and characterization of a manganese(III) schiff base complex and exploration of Br ···Br interaction in the solid state structure of the complex
(Source: Journal of Coordination Chemistry)
Source: Journal of Coordination Chemistry - January 8, 2020 Category: Chemistry Authors: Mondal, Ipsita Ghosh, Kousik Franconetti, Antonio Frontera, Antonio Chatterjee, Sudipta Chattopadhyay, Shouvik Source Type: research

[ASAP] DFT Mechanistic Account for the Site Selectivity of Electron-Rich C(sp < sup > 3 < /sup > ) –H Bond in the Manganese-Catalyzed Aminations
Organic LettersDOI: 10.1021/acs.orglett.9b04215 (Source: Organic Letters)
Source: Organic Letters - January 8, 2020 Category: Chemistry Authors: Zheyuan Liu †, Yu Lu‡, Jiandong Guo‡, Wenping Hu†, Yanfeng Dang*†, and Zhi-Xiang Wang*‡ Source Type: research

High-temperature transport properties of lithium manganese spinels substituted with Ni and Ti
Publication date: Available online 7 January 2020Source: Journal of Solid State ChemistryAuthor(s): Satoko Abe, Masaya Takagi, Shoko Iwasaki, Yoshinori Satou, Satoko Tezuka, Shigeki Komine, Fumio MunakataAbstractSpinel Li1.05Mn2O4−δ substituted with Ni and Ti were fabricated via a solid-state reaction technique. The Rietveld refinement of synchrotron X-ray powder diffraction data confirmed an Fd3¯m space group of spinel structure for all synthesized materials. Variation in the lattice parameter and M − O distances (M: transition metal at 16d site) due to the dopant content indicated that Ni subst...
Source: Journal of Solid State Chemistry - January 8, 2020 Category: Chemistry Source Type: research

Synthesis, characterization and activity of doped graphitic carbon nitride materials towards photocatalytic oxidation of volatile organic pollutants emitted from 3D printer
Publication date: Available online 7 January 2020Source: Journal of Photochemistry and Photobiology A: ChemistryAuthor(s): Szymon Wojtyła, Klaudyna Śpiewak, Tomasz BaranAbstractA low specific surface area and high rate of electron-hole pairs recombination restrict photocatalytic use of graphitic carbon nitride (g-C3N4). In this context, we demonstrated that doping of g-C3N4 may overcome these obstacles. Graphitic carbon nitride doped with iron, manganese, antimony, and bismuth demonstrated the reduced band gap energy, enlarged specific surface area, suppressed recombination of photogenerated charge carriers, and enhanced...
Source: Journal of Photochemistry and Photobiology A: Chemistry - January 8, 2020 Category: Chemistry Source Type: research

Highly efficient Co-OMS-2 catalyst for the degradation of reactive blue 19 in aqueous solution
In this study, Co-doped manganese oxide octahedral molecular sieve (Co-OMS-2) has been successfully synthesized. The Co-OMS-2 catalyst shows high efficiency and excellent stability in activating peroxymonosulfate (PMS) to generate sulfate radicals for the degradation of Reactive Blue 19 in aqueous solution. The results illuminate the degradation efficiency has been enhanced by increasing catalyst dose and PMS concentration. Moreover, Co-OMS-2 has been successfully reused 5 times without significant decrease in the catalytic activity by the simple filtration.Graphical abstract (Source: Inorganic Chemistry Communications)
Source: Inorganic Chemistry Communications - January 8, 2020 Category: Chemistry Source Type: research

Manganese Chloride Exposure Causes Disorder of Energy Metabolism and Induces Oxidative Stress and Autophagy in Chicken Liver.
Abstract Manganese (Mn) pollution is an important environmental problem because of the potential toxicity to human and animal health. However, the effects of Mn on energy metabolism and autophagy are not clear. Consequently, we examined the effects of excessive and chronic exposure to Mn on liver function, oxidative stress, respiratory chain complex activity, and autophagy in chicken liver. Our results indicated that the accumulation of Mn in the liver and levels of AST and ALT in the serum of the Mn-exposed group were significantly higher (P
Source: Biological Trace Element Research - January 8, 2020 Category: Biology Authors: Jiang J, Wang F, Wang L, Xiao J, Guo D Tags: Biol Trace Elem Res Source Type: research

Manganese-modified biochar for highly efficient sorption of cadmium.
In this study, corn stalk was modified by manganese (Mn) before (MBC1) and after (MBC2) pyrolysis at different temperatures (400~600 °C) under anaerobic conditions for Cd sorption in both water and soil. Batch experiments in aqueous solution were conducted to evaluate the optimum sorption capability by biochar with and without manganese-modified. Both types of manganese modification can improve the sorption capacity of Cd(II) on biochar, which is superior to the corresponding pristine biochar without modification, especially, pyrolyzed at 500 °C with 5:1 modification ratio. Under the optimal preparation c...
Source: Environmental Science and Pollution Research International - January 8, 2020 Category: Environmental Health Authors: Tan X, Wei W, Xu C, Meng Y, Bai W, Yang W, Lin A Tags: Environ Sci Pollut Res Int Source Type: research

Removal of heavy metals using a novel sulfidogenic AMD treatment system with sulfur reduction: Configuration, performance, critical parameters and economic analysis.
Abstract A novel sulfidogenic acid mine drainage (AMD) treatment system with a sulfur reduction process was developed. During the 220-d operation,>99.9% of 380-mg/L ferric, 150-mg/L aluminum, 110-mg/L zinc, 20-mg/L copper and 2.5-mg/L lead ions, and 42.6-44.4% of 100-mg/L manganese ions in the synthetic AMD were step-by-step removed in the developed system with three pre-posed metal precipitators and a sulfur reduction reactor. Among them, zinc, copper and lead ions were removed by the biogenic hydrogen sulfide that produced through elemental sulfur reduction; while ferric, aluminum and manganese ions were remo...
Source: Environment International - January 8, 2020 Category: Environmental Health Authors: Sun R, Li Y, Lin N, Ou C, Wang X, Zhang L, Jiang F Tags: Environ Int Source Type: research

[ASAP] Advanced Paramagnetic Resonance Studies on Manganese and Iron Corroles with a Formal d < sup > 4 < /sup > Electron Count
Inorganic ChemistryDOI: 10.1021/acs.inorgchem.9b02635 (Source: Inorganic Chemistry)
Source: Inorganic Chemistry - January 7, 2020 Category: Chemistry Authors: J. Krzystek †, Alexander Schnegg‡§, Azar Aliabadi§, Karsten Holldack?, Sebastian A. Stoian?, Andrew Ozarowski†, Scott D. Hicks#, Mahdi M. Abu-Omar¶, Kolle E. Thomas?, Abhik Ghosh?, Kenneth P. Caulfield?, Zachary J. Tonzetich?, and Joshua Telser*? Source Type: research

Assessment of the manganese cluster’s oxidation state via photoactivation of photosystem II microcrystals [Biophysics and Computational Biology]
Knowledge of the manganese oxidation states of the oxygen-evolving Mn4CaO5 cluster in photosystem II (PSII) is crucial toward understanding the mechanism of biological water oxidation. There is a 4 decade long debate on this topic that historically originates from the observation of a multiline electron paramagnetic resonance (EPR) signal with... (Source: Proceedings of the National Academy of Sciences)
Source: Proceedings of the National Academy of Sciences - January 7, 2020 Category: Science Authors: Mun Hon Cheah, Miao Zhang, Dmitry Shevela, Fikret Mamedov, Athina Zouni, Johannes Messinger Tags: Physical Sciences Source Type: research

Oxidation of iodide and hypoiodous acid by non-chlorinated water treatment oxidants and formation of iodinated organic compounds: A review
Publication date: 15 April 2020Source: Chemical Engineering Journal, Volume 386Author(s): Juan Li, Jin Jiang, Su–Yan Pang, Ying Cao, Yang Zhou, Chaoting GuanAbstractIodinated organic compounds (I-OCs) have raised significant public concerns due to their high toxicity. Iodide (I−) as an inorganic source of I-OCs is ubiquitously present in raw waters. I− can be easily oxidized by water treatment oxidants/disinfectants generating reactive iodine species such as hypoiodous acid (HOI), which can further react with organic compounds generating I-OCs. The oxidation of I−/HOI by chlorinated oxidants/disinfe...
Source: Chemical Engineering Journal - January 5, 2020 Category: Chemistry Source Type: research

Effect of borate glass network to electrochemical properties: Manganese-doped lithium borate glasses
Publication date: May 2020Source: Radiation Physics and Chemistry, Volume 170Author(s): Amorntep Montreeuppathum, Pinit Kidkhunthod, Saroj Rujirawat, Rattikorn Yimnirun, Supree Pinitsoontorn, Santi MaensiriAbstractRecent development of manganese-lithium borate glasses for applications as supercapacitor was reported. The glasses were prepared by melt-quench technique and characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), and Uv–visible spectroscopy (UV-VIS). The paramagnetism of synthesized glasses was observed at room temperature measured by vibrating sample magnetometry (VSM). The electroc...
Source: Radiation Physics and Chemistry - January 4, 2020 Category: Physics Source Type: research

Photothermal conversion of graphene/layered manganese oxide 2D/2D composites for room-temperature catalytic purification of gaseous formaldehyde
Publication date: Available online 3 January 2020Source: Journal of the Taiwan Institute of Chemical EngineersAuthor(s): Zhongsen Wang, Huijia Yu, Long Zhang, Limin Guo, Xiaoping DongAbstractManganese oxides (MnOx) are one kind of the most used thermo-catalysts for catalytic oxidation of gaseous organic pollutants, but this process will cause excessive energy consumption. Herein, the photothermal effect of graphene oxide (GO) was utilized to convert the inexpensive solar energy to thermal energy, which subsequently drives the thermo-catalysis of MnOx for degrading gaseous formaldehyde at ambient condition. For achieving hi...
Source: Journal of the Taiwan Institute of Chemical Engineers - January 3, 2020 Category: Chemistry Source Type: research

Measuring the fast oxidation kinetics of a manganese oxygen carrier using microfluidized bed thermogravimetric analysis
Publication date: 1 April 2020Source: Chemical Engineering Journal, Volume 385Author(s): Ye Li, Zhenshan Li, Lei Liu, Ningsheng CaiAbstractOxygen carriers play critical roles in chemical looping combustion. A key task in investigating the oxygen carrier reactivity is to measure the redox kinetics in the fluidization state. However, this is still a challenge because one must perform the redox kinetics measurement in a fluidizing environment in order to simulate the strong mass and heat transfer occurring in a practical fluidized bed reactor. Herein, we report a new method, called the microfluidized bed thermogravimetric ana...
Source: Chemical Engineering Journal - January 3, 2020 Category: Chemistry Source Type: research

Controlled Self-Template Synthesis of Manganese-Based Cuprous Oxide Nanoplates Towards Improved Fire Safety Properties of Epoxy Composites
Publication date: Available online 31 December 2019Source: Journal of Hazardous MaterialsAuthor(s): Wei Wang, Yao Yuan, Bin Yu, Kim Meow Liew, Richard K.K. Yuen, Jiajia Liu, Yuan HuAbstractTo date epoxy resins have been extensively used in the field of chemical engineering, aerospace and building materials. Nevertheless, the utilization of flammable epoxy resins has posed a huge threat to lives and properties, which restricted their applications. In this work, manganese-based cuprous oxides two-dimensional nanosheets (Mn@Cu2O-M) are rationally designed and successfully prepared to improve the toxic effluent elimination of ...
Source: Journal of Hazardous Materials - January 3, 2020 Category: Environmental Health Source Type: research

Cu-Mn-Ce Ternary Oxide Catalyst Coupled with KOH Sorbent for Air Pollution Control in Confined Space
Publication date: Available online 20 December 2019Source: Journal of Hazardous MaterialsAuthor(s): Jin Lin, Qian Li, Shouxiang Lu, Xiao Chen, Kim Meow LiewAbstractFor air pollution control in confined space such as submarine and spacecraft, copper-manganese-cerium ternary oxide catalysts coupled with KOH sorbent were synthesized through the wet impregnation method, solid-state impregnation method A and B, and wet/solid-state impregnation method. The samples were tested for CO and CO2 removal dynamically and isothermally from 30 °C to 150 °C using two fixed bed reactors, and then characterized by XRD,...
Source: Journal of Hazardous Materials - January 3, 2020 Category: Environmental Health Source Type: research

In situ polymerization of aniline on the surface of manganese oxide nanosheets for reducing fire hazards of epoxy
Publication date: 1 March 2020Source: Materials Chemistry and Physics, Volume 243Author(s): Dengdeng Xie, Youming Han, Keqing Zhou, Congling ShiAbstractLayered manganese dioxide (MnO2) is a promising nanofillers for reducing the fire hazards of polymeric materials due to its excellent catalytic charring effect. However, its poor dispersion in polymer matrices hindered its full performance. In this work, polyaniline (PANI) coatings were uniformly coated on the surface of MnO2 nanosheets by in-situ polymerization method to form binary hybrids (PANI-MnO2 hybrids). The prepared PANI-MnO2 hybrids were characterized by X-ray dif...
Source: Materials Chemistry and Physics - January 3, 2020 Category: Materials Science Source Type: research

Morphology and corrosion properties of FeMn-Graphene oxide composite coatings
Publication date: 25 April 2020Source: Journal of Alloys and Compounds, Volume 821Author(s): Ahmed Aliyu, Chandan SrivastavaAbstractMorphology and corrosion properties of electrodeposited iron manganese-graphene oxide (FeMn-GO) composite coatings was investigated as a function of the GO content. The composite coatings exhibited uniform and compact morphology for lower concentrations of GO in the coating. For higher GO concentrations, agglomeration of GO in the electrolyte bath resulted in non-uniform coating morphology with large surface defects. The influence of GO concentration and coating morphology on the corrosion pro...
Source: Journal of Alloys and Compounds - January 2, 2020 Category: Chemistry Source Type: research

Manganese hexacyanoferrate reinforced by PEDOT coating toward high-rate and long-life sodium-ion battery cathode
J. Mater. Chem. A, 2020, Accepted Manuscript DOI: 10.1039/C9TA12376H, PaperXiao Wang, Baoqi Wang, Yuxin Tang, Ben Xu, Chu Liang, Mi Yan, Yinzhu Jiang Prussian blue analogues hold great promise as cathodes in sodium ion batteries. Among Prussian blue analogues, manganese hexacyanoferrate is desirable because of its high working voltage, as well as its... 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 - January 2, 2020 Category: Chemistry Authors: Xiao Wang Source Type: research

An ultrasensitive immunosensor based on manganese dioxide-graphene nanoplatelets and core shell Fe3O4@Au nanoparticles for label-free detection of carcinoembryonic antigen.
Abstract A novel electrochemical immunosensor was developed for label-free detection of carcinoembryonic antigen (CEA) as a cancer biomarker. The designed immunosensor was based on CEA antibody (anti-CEA) anchored with core shell Fe3O4@Au nanoparticles which were immobilized on a screen-printed carbon electrode modified with manganese dioxide decorating on graphene nanoplatelets (SPCE/GNP-MnO2/Fe3O4@Au-antiCEA). The SPCE was placed onto a home-made electrode holder for easy handling. The approach was based on direct binding of CEA to a fixed amount of anti-CEA on the modified electrode for the specific detection u...
Source: Bioelectrochemistry - January 2, 2020 Category: Biochemistry Authors: Butmee P, Tumcharern G, Thouand G, Kalcher K, Samphao A Tags: Bioelectrochemistry Source Type: research

Nutritional and biological characteristics of the date palm fruit (Phoenix dactylifera L.) – A review
Publication date: Available online 30 December 2019Source: Food BioscienceAuthor(s): M. Iftikhar Hussain, Muhammad Farooq, Qamar Abbas SyedAbstractThe date palm (Phoenix dactylifera L.) is a popular perennial fruit tree cultivated worldwide, especially in West Asia and North Africa. Its fruit (date) is equally liked around the globe. This systematic review critically evaluates past and recent literature from the perspective of nutritional profile and nutraceuticals attributes of different date varieties. A systematic literature search was done using the Scopus, Centre for Agriculture and Bioscience International (CABI), Go...
Source: Food Bioscience - January 1, 2020 Category: Food Science Source Type: research

Concentrations and deficiencies of minerals in cattle submitted to a diagnostic laboratory in Saskatchewan from 2003-2012: A retrospective study.
Abstract Trace mineral analyses of samples submitted to Prairie Diagnostic Services laboratory from Saskatchewan cattle between 2003 and 2012 were examined, with the objective of describing trends and reporting concentrations and deficiencies of minerals. Deficiencies were observed with copper, iron, manganese, magnesium, zinc, and cobalt. Deficiency was most commonly seen in copper, followed by iron, manganese, and magnesium accounting for 47.2%, 15.1%, 13.0%, and 10.8% of deficiencies, respectively. Deficiency in cobalt was least common followed by zinc accounting for 4.2% and 9.7% of deficiencies, respectively....
Source: The Canadian Veterinary Journal - January 1, 2020 Category: Veterinary Research Authors: Perdrizet U, Blakley B, Al Dissi A Tags: Can Vet J Source Type: research

Alteration of Metal Elements in Radiation Injury: Radiation-Induced Copper Accumulation Aggravates Intestinal Damage.
In this study, we explored the association between radiation-induced damage and 7 trace metal elements in mouse models. We found that the concentration of zinc and copper in mice serum was decreased significantly after irradiation, whereas that of nickel, manganese, vanadium, cobalt, and stannum was not changed by inductively coupled plasma mass spectrometry. The role of copper in radiation-induced intestines was characterized in detail. The concentration of copper was increased in irradiated intestine but reduced in irradiated heart. Immunohistochemistry staining showed that copper transporter protein copper transport 1 e...
Source: Dose Response - January 1, 2020 Category: Drugs & Pharmacology Authors: Zhong L, Dong A, Feng Y, Wang X, Gao Y, Xiao Y, Zhang J, He D, Cao J, Zhu W, Zhang S Tags: Dose Response Source Type: research

Zero-valent iron-manganese bimetallic nanocomposites catalyze hypochlorite for enhanced thallium(I) oxidation and removal from wastewater: Materials characterization, process optimization and removal mechanisms
In this study, zero-valent iron-manganese (nZVIM) bimetallic nanocomposites were prepared via one-pot borohydride reduction and coupled with hypochlorite (ClO−) oxidation for enhanced thallium (Tl) removal from wastewater. Amorphous nZVIM nanoparticles were successfully synthesized, with a specific surface area of 106.89 m2/g, and a saturation magnetization of 65.16 emu/g. In comparison with the nZVIM adsorption or ClO− oxidation alone, the hybrid nZVIM/ClO− process achieved much faster Tl(I) removal rate over a wide pH range from 6 to 10. Maximum Tl(I) removal capacity was as high as 990.0 mg/g. The oxid...
Source: Journal of Hazardous Materials - December 31, 2019 Category: Environmental Health Source Type: research

[ASAP] Effect of Sodium Content on the Electrochemical Performance of Li-Substituted, Manganese-Based, Sodium-Ion Layered Oxide Cathodes
ACS Applied Materials& InterfacesDOI: 10.1021/acsami.9b12984 (Source: ACS Applied Materials and Interfaces)
Source: ACS Applied Materials and Interfaces - December 31, 2019 Category: Materials Science Authors: Qun Huang †, Pingge He‡, Lei Xiao†, Yiming Feng†, Jiatu Liu§, Ying Yang†, Boyun Huang†, Xinwei Cui*?, Peng Wang*§, and Weifeng Wei*† Source Type: research

Formation and kinetic studies of manganese(IV)-oxo porphyrins: Oxygen atom transfer mechanism of sulfide oxidations.
Abstract Visible light irradiation of photo-labile porphyrin-manganese(III) chlorates or bromates (2) produced manganese(IV)-oxo porphyrins [MnIV(Por)(O)] (Por = porphyrin) (3) in three porphyrin ligands. The same oxo species 3 were also formed by chemical oxidation of the corresponding manganese(III) precursors (1) with iodobenzene diacetate, i.e. PhI(OAc)2. The systems under study include 5,10,15,20-tetra(pentafluorophenyl)porphyrin‑manganese(IV)-oxo (3a), 5,10,15,20-tetra(2,6-difluorophenyl)porphyrin‑manganese(IV)-oxo (3b), and 5,10,15,20-tetramesitylporphyrin‑manganese(IV)-oxo (3c). As expected...
Source: Journal of Inorganic Biochemistry - December 31, 2019 Category: Biochemistry Authors: Klaine S, Bratcher F, Winchester CM, Zhang R Tags: J Inorg Biochem Source Type: research

Acid functionalized-nanoporous carbon/MnO2 composite for removal of arsenic from aqueous medium
Publication date: December 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 8Author(s): Shahin Pathan, Nancy Pandita, Nand KishoreAbstractNanoporous carbon (NPC) structures synthesized from grass clippings mown at yard were acid functionalized and coated with manganese oxide nanoparticles at room temperature. The synthesized composite was characterized by FTIR, XRD, BET, TEM, TGA and XPS. Characterization results showed formation of acid functionalized nanoporouscarbon/MnO2 (Af-NPC/MnO2) composite which was amorphous in nature. Af-NPC/MnO2 was further explored for removal of As(III) and As(V) from aqueous medium....
Source: Arabian Journal of Chemistry - December 30, 2019 Category: Chemistry Source Type: research

Remediation of wastewater using various nano-materials
Publication date: December 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 8Author(s): Muzammil Anjum, R. Miandad, Muhammad Waqas, F. Gehany, M.A. BarakatAbstractIn the present era of scarcity of water resources, effective treatment of wastewater is a major prerequisite for growing economy. It is critical to develop and implement advanced wastewater treatment technologies with high efficiency and low capital requirement. Among various treatments, recent advanced processes in nano-material sciences have been attracting the attention of scientists. However, limited collective knowledge is available in this context...
Source: Arabian Journal of Chemistry - December 30, 2019 Category: Chemistry Source Type: research

[ASAP] A Highly Selective Manganese-Catalyzed Synthesis of Imines under Phosphine-Free Conditions
OrganometallicsDOI: 10.1021/acs.organomet.9b00769 (Source: Organometallics)
Source: Organometallics - December 30, 2019 Category: Chemistry Authors: Huining Chai* †?, Kun Yu‡?, Bo Liu‡?, Weiqiang Tan†, and Guangyao Zhang§ Source Type: research

Determining the provenance of the European glass beads of Lumbu (Mbanza Kongo, Angola)
Publication date: May 2020Source: Microchemical Journal, Volume 154Author(s): Mafalda Costa, Pedro Barrulas, Luís Dias, Maria da Conceição Lopes, João Barreira, Bernard Clist, Karlis Karklins, Maria da Piedade de Jesus, Sónia da Silva Domingos, Luc Moens, Peter Vandenabeele, José MirãoAbstractA collection of glass beads found in Lumbu (Mbanza Kongo, Angola) were analyzed by means of a multi-analytical minimally invasive methodology, which included handheld X-ray fluorescence (hXRF), variable pressure scanning electron microscope coupled with energy dispersive X-ray spectrome...
Source: Microchemical Journal - December 29, 2019 Category: Chemistry Source Type: research

Ionic liquid functionalized magnetic organosilica nanocomposite: A powerful and efficient support for manganese catalyst
Publication date: Available online 27 December 2019Source: Materials Chemistry and PhysicsAuthor(s): Maryam Neysi, Dawood Elhamifar, Meysam NorouziAbstractA novel Mn-containing ionic liquid and ethyl based magnetic organosilica with core-shell structure (Fe3O4@OS/IL-Mn) is prepared, characterized and applied as powerful and recoverable nanocatalyst. The Fe3O4@OS/IL-Mn was prepared via simultaneous coating of tetramethoxysilane (TMOS) and 1,2-bis(triethoxysilyl)ethane (BTEE) over magnetite nanoparticles (MNPs) followed by treatment with ionic liquid and manganese acetate. This catalyst was characterized using scanning elect...
Source: Materials Chemistry and Physics - December 28, 2019 Category: Materials Science Source Type: research

The influence of manganese on the bake hardening of hot dip galvanized low carbon steels
Publication date: Available online 26 December 2019Source: Journal of Materials Research and TechnologyAuthor(s): Rodrigo Rocha de Meira, Fabio Moreira da Silva Dias, Jefferson Fabrício Cardoso LinsAbstractThis work is a study of the manganese influence on the aging behavior of hot rolled and hot dip galvanized low carbon steels. For this, two steels were evaluated, with Mn content ranged between 0.16% and 0.30%. The work was carried out on industrial scale, in order to verify the tendency of results obtained previously on studies performed on laboratory scale. The evaluation of the aging phenomenon was performed in...
Source: Journal of Materials Research and Technology - December 28, 2019 Category: Materials Science Source Type: research

Oxidative enzymes from newly local strain Aspergillus iizukae EAN605 using pumpkin peels as a production substrate: Optimized production, characterization, application and techno-economic analysis
Publication date: 15 March 2020Source: Journal of Hazardous Materials, Volume 386Author(s): Efaq Noman, A.A. Al-Gheethi, Balkis A. Talip, Radin Mohamed, Amir Hashim KassimAbstractThe present study deals with optimizing, producing, characterizing, application and techno- economic analysis of oxidative enzymes [Laccase (Lac), manganese peroxidase (MnP), and lignin peroxidase (LiP)] from Aspergillus iizukae EAN605 in submerged fermentation process using pumpkin peels as a production substrate. The best operating parameters for producing Lac, MnP and LiP (6.15, 2.58 and 127.99 U mg−1 respectively) were recorded with 20...
Source: Journal of Hazardous Materials - December 27, 2019 Category: Environmental Health Source Type: research

[ASAP] Three-Coordinate Formal Cobalt(0), Iron(0), and Manganese(0) Complexes with Persistent Carbene and Alkene Ligation
Accounts of Chemical ResearchDOI: 10.1021/acs.accounts.9b00492 (Source: Accounts of Chemical Research)
Source: Accounts of Chemical Research - December 27, 2019 Category: Chemistry Authors: Yang Liu †, Jun Cheng, and Liang Deng* Source Type: research

YvcI from Bacillus subtilis has in vitro RNA pyrophosphohydrolase activity [Enzymology]
RNA degradation is one of several ways for organisms to regulate gene expression. In bacteria, the removal of two terminal phosphate moieties as orthophosphate (Bacillus subtilis) or pyrophosphate (Escherichia coli) triggers ribonucleolytic decay of primary transcripts by 5′-monophosphate–dependent ribonucleases. In the soil-dwelling firmicute species B. subtilis, the RNA pyrophosphohydrolase BsRppH, a member of the Nudix family, triggers RNA turnover by converting primary transcripts to 5′-monophospate RNA. In addition to BsRppH, a source of redundant activity in B. subtilis has been proposed. Here, usin...
Source: Journal of Biological Chemistry - December 27, 2019 Category: Chemistry Authors: Jens Frindert, Masroor Ahmad Kahloon, Yaqing Zhang, Yasar Luqman Ahmed, Irmgard Sinning, Andres Jaschke Tags: RNA Source Type: research

Molecules, Vol. 25, Pages 111: Enhanced Heavy Metal Removal from Acid Mine Drainage Wastewater Using Double-Oxidized Multiwalled Carbon Nanotubes
In this study, we assessed the capacity of oxidized and double-oxidized multiwalled carbon nanotubes (MWCNTs) to remove heavy metals ions from acidic solutions. The MWCNTs were tested for copper (Cu), manganese (Mn), and zinc (Zn) removal, which showed an increment of 79%, 78%, and 48%, respectively, with double-oxidized MWCNTs compared to oxidized MWCNTs. Moreover, the increase in pH improved the sorption capacity for all the tested metals, which indicates that the sorption potential is strongly dependent on the pH. The kinetic adsorption process for three metals can be described well with a pseudo-second-order kinetic mo...
Source: Molecules - December 27, 2019 Category: Chemistry Authors: Carolina Rodr íguez Eduardo Leiva Tags: Article Source Type: research

Highly Reversible Water Splitting Cell Building from Hierarchical 3D Nickel Manganese Oxyphosphide Nanosheets
Publication date: Available online 26 December 2019Source: Nano EnergyAuthor(s): Jayaraman Balamurugan, Thanh Tuan Nguyen, Vanchiappan Aravindan, Nam Hoon Kim, Joong Hee LeeAbstractWhile it is essential to progress highly reversible water splitting cells with hierarchical nanostructures for overall water splitting, meeting large-scale industrial applications remains a key challenge. Herein, for the first time, a new strategy is established to fabricate hierarchical 3D nickel manganese oxyphosphide nanosheets (NiMnOP NSs) with high electroactive sites, numerous nanoporous networks, and plentiful oxygen vacancies for highly ...
Source: Nano Energy - December 26, 2019 Category: Nanotechnology Source Type: research

Improving osteogenesis of calcium phosphate bone cement by incorporating with manganese doped β-tricalcium phosphate
Publication date: April 2020Source: Materials Science and Engineering: C, Volume 109Author(s): Tingting Wu, Haishan Shi, Yongyi Liang, Teliang Lu, Zefeng Lin, Jiandong YeAbstractLack of osteogenic capacity limits the bone repair effect of calcium phosphate cement (CPC). In present work, bivalent manganese ion (Mn2+) doped β-tricalcium phosphate (Mn-TCP) was incorporated into CPC to enhance its osteogenic ability. The incorporation of Mn-TCP promoted the hydration reaction of CPC. The presence of Mn2+ made the hydration products finer. When adding 10 wt% Mn-TCP in CPC (Mn-CPC-1), the setting time of CPC was shorte...
Source: Materials Science and Engineering: C - December 26, 2019 Category: Materials Science Source Type: research

Synthesis and biological characterization of Mn0.5Zn0.5EuxDyxFe1.8-2xO4 nanoparticles by sonochemical approach
Publication date: April 2020Source: Materials Science and Engineering: C, Volume 109Author(s): S. Rehman, M.A. Almessiere, F.A. Khan, A. Demir Korkmaz, N. Tashkandi, Y. Slimani, A. BaykalAbstractMetallic nanoparticles (NPs) possess unique properties which makes them attractive candidates for various applications especially in field of experimental medicine and drug delivery. Many approaches were developed to synthesize divers and customized metallic NPs that can be useful in many areas such as, experimental medicine, drug design, drug delivery, electrical and electronic engineering, electrochemical sensors, and biochemical...
Source: Materials Science and Engineering: C - December 26, 2019 Category: Materials Science Source Type: research

Metal-organic framework-derived porous MnNi2O4 microflower as an advanced electrode material for high-performance supercapacitors
Publication date: Available online 25 December 2019Source: Journal of Alloys and CompoundsAuthor(s): Mengdi Lan, Xixi Wang, Ruijie Zhao, Mengyao Dong, Linxia Fang, Lingling WangAbstractMetal-organic framework (MOF)-derived materials have attracted considerable research interest for electrochemical energy storage and conversion due to their porosity characteristics and relatively simple synthesis routes. Spinel-type ternary transition metal oxide nanomaterials are promising electrode materials in energy-related fields in view of their high reactivity. In this work, flower-like manganese nickelate (MnNi2O4) assembled with po...
Source: Journal of Alloys and Compounds - December 26, 2019 Category: Chemistry Source Type: research

Particle and organic vapor emissions from children's 3-D pen and 3-D printer toys.
Authors: Yi J, Duling MG, Bowers LN, Knepp AK, LeBouf RF, Nurkiewicz TR, Ranpara A, Luxton T, Martin SB, Burns DA, Peloquin DM, Baumann EJ, Virji MA, Stefaniak AB Abstract Objective: Fused filament fabrication "3-dimensional (3-D)" printing has expanded beyond the workplace to 3-D printers and pens for use by children as toys to create objects.Materials and methods: Emissions from two brands of toy 3-D pens and one brand of toy 3-D printer were characterized in a 0.6 m3 chamber (particle number, size, elemental composition; concentrations of individual and total volatile organic compounds (TVOC)). ...
Source: Inhalation Toxicology - December 26, 2019 Category: Respiratory Medicine Tags: Inhal Toxicol Source Type: research

Evolution of chromium, manganese and iron oxidation state during conversion of nuclear waste melter feed to molten glass
Publication date: 1 March 2020Source: Journal of Non-Crystalline Solids, Volume 531Author(s): D.P. Guillen, S. Lee, P. Hrma, J. Traverso, R. Pokorny, J. Klouzek, A.A. KrugerAbstractOxidation state and chemical conversion of three surrogate nuclear high-level waste melter feeds heat treated to temperatures between 500 and 1200 °C were studied using X-ray near-edge structure, feed expansion tests, X-ray diffraction, and evolved gas analyses. For the high-chromium feed (3.00 mass% Cr2O3 in glass), the average Cr oxidation state was predominately Cr3+ at the lowest and highest heat-treatment temperatures and Cr6+ at i...
Source: Journal of Non Crystalline Solids - December 26, 2019 Category: Chemistry Source Type: research

Synthesis and characterization of N,N-chelate manganese complexes and applications in CN coupling reactions
Publication date: 1 March 2020Source: Inorganica Chimica Acta, Volume 502Author(s): Kuhali Das, Amol Kumar, Akash Jana, Biplab MajiAbstractBidentate NN-ligands have been derived from the reaction between aldehydes and 2-(aminomethyl)pyridine. The treatment of these ligands with Mn(CO)5Br gave complexes that are highly bench stable. The complexes were characterized by various analytical and spectral methods. Single-crystal XRD of complex Mn-2 was performed, which indicates an octahedral geometry around the metal center. The complexes efficiently catalyze the N-alkylation of anilines with alcohols under optimized reaction co...
Source: Inorganica Chimica Acta - December 26, 2019 Category: Chemistry Source Type: research