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Sodium carbonate

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https://www.readbyqxmd.com/read/27902337/thermodesulfitimonas-autotrophica-gen-nov-sp-nov-a-thermophilic-obligate-sulfite-reducing-bacterium-isolated-from-a-terrestrial-hot-spring
#1
G B Slobodkina, R V Baslerov, A A Novikov, E A Bonch-Osmolovskaya, A I Slobodkin
A novel thermophilic, anaerobic, chemolithoautotrophic bacterium, strain SF97T, was isolated from a terrestrial hot spring (Kuril Islands, Russia). Cells of strain SF97T were rod-shaped and motile with a Gram-positive cell-wall type. The novel isolate grew at 45-72oC (optimum 65oC) and pH 5.5-8.5 (optimum 6.0-6.5). The strain grew chemolithoautotrophically with molecular hydrogen as electron donor, sodium sulfite or SO2 gas as electron acceptor and bicarbonate/CO2 as a carbon source. Sulfate, thiosulfate, elemental sulfur, Fe(III) or nitrate were not used as an electron acceptors either with H2 or organic electron donors...
October 27, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27897399/density-functional-theory-research-on-the-reduction-mechanism-for-the-solvent-additive-in-sodium-ion-battery
#2
Qi Liu, Daobin Mu, Borong Wu, Lei Wang, Liang Gai, Feng Wu
Solid electrolyte interface (SEI) film in Na-ion battery is closely related to capacity fading and cycling stability of the battery. However, there is less study on SEI film of Na-ion battery and the mechanism of SEI film formation is unclear. The mechanism for the reduction of ethylene carbonate (EC), propylene carbonate (PC), vinylene carbonate (VC), ethylene sulfite (ES), 1,3-propylene sulfite (PS) and fluorinated ethylene carbonate (FEC) is studied by density functional theory (DFT) method. The reaction activation energy, Gibbs free energies and enthalpies, structures of the transition states etc...
November 29, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27891595/comparison-of-the-use-of-sodium-carbonate-washing-soda-crystals-and-apomorphine-for-inducing-emesis-in-dogs
#3
E Yam, G Hosgood, L Smart
OBJECTIVE: To describe the use of sodium carbonate and apomorphine in a historical cohort of dogs, compare the occurrence of emesis and report any adverse effects recorded. METHODS: This historical, observational study included information from medical records of dogs that received an emetic agent. The occurrence of emesis with apomorphine or sodium carbonate was calculated and the association between emesis and agent was explored, with the odds ratio and 95% confidence interval (CI) reported...
December 2016: Australian Veterinary Journal
https://www.readbyqxmd.com/read/27885733/s-doped-n-rich-carbon-nanosheets-with-expanded-interlayer-distance-as-anode-materials-for-sodium-ion-batteries
#4
Jiqian Yang, Xianlong Zhou, Dihua Wu, Xudong Zhao, Zhen Zhou
2D composites with S doping into N-rich carbon nanosheets are fabricated, whose interlayer distance becomes large enough for Na(+) insertion and diffusion. The large surface area and stable structure also provide more sites for Na(+) adsorption, leading to high Na-storage capacity and excellent rate performance. Moreover, Faradaic reactions between Na(+) and tightly bound S is beneficial for further improvement of Na-storage capacity.
November 25, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27885728/tailoring-graphene-oxide-based-aerogels-for-efficient-solar-steam-generation-under-one-sun
#5
Xiaozhen Hu, Weichao Xu, Lin Zhou, Yingling Tan, Yang Wang, Shining Zhu, Jia Zhu
Graphene oxide-based aerogels with carefully tailored properties are developed to enable efficient solar steam generation. Aerogels, with inherent porous structures, are excellent thermal insulators and provide channels for water supply and vapor escape. With enhanced absorption and hydrophilicity by incorporation of carbon nanotubes and sodium alginate, the resulting aerogels can enable efficient (≈83%) solar steam generation under one-sun illumination.
November 25, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27882619/in-operando-mechanism-analysis-on-nanocrystalline-silicon-anode-material-for-reversible-and-ultrafast-sodium-storage
#6
Lei Zhang, Xianluo Hu, Chaoji Chen, Haipeng Guo, Xiaoxiao Liu, Gengzhao Xu, Haijian Zhong, Shuang Cheng, Peng Wu, Jiashen Meng, Yunhui Huang, Shixue Dou, Huakun Liu
The electrochemical mechanism of nanocrystalline silicon anode in sodium ion batteries is first studied via in operando Raman and in operando X-ray diffraction. An irreversible structural conversion from crystalline silicon to amorphous silicon takes place during the initial cycles, leading to ultrafast reversible sodium insertion in the newly generated amorphous silicon. Furthermore, an optimized silicon/carbon composite has been developed to further improve its electrochemical performance.
November 24, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27881933/new-bis-azobenzocrown-s-with-dodecylmethylmalonyl-linkers-as-ionophores-for-sodium-selective-potentiometric-sensors
#7
Elżbieta Luboch, Maciej Jeszke, Mirosław Szarmach, Natalia Łukasik
Novel biscrowns 1 and 2 were synthesized from 13-membered azobenzocrown ethers containing bromoalkylenoxy chains in para position relative to the azo group. The synthesized diester molecules are dodecylmethylmalonic acid derivatives differing by the linker length. The synthesized compounds have the potential of being used as sodium ionophores in ion-selective electrodes. They were characterized and used as ionophores in classic and miniature, solid contact (screen-printed and glassy carbon) membrane ion-selective electrodes...
2016: Journal of Inclusion Phenomena and Macrocyclic Chemistry
https://www.readbyqxmd.com/read/27880962/production-of-cellulases-by-rhizopus-stolonifer-from-glucose-containing-media-based-on-the-regulation-of-transcriptional-regulator-cre
#8
Yingyiing Zhang, Bin Tang, Guocheng Du
Carbon catabolite repression is a crucial regulation in microorganism, while its characteristic in Rhizopus is unclear now. We extracted a carbon regulation gene cre that encoded a carbon catabolite repressor protein (CRE) from Rhizopus stolonifer TP-02, and studied the regulation of CRE by real-time qPCR. CRE responded to the glucose in a certain range, wherein it could significantly regulate part of cellulases genes (eg, bg and cbh2) without cbh1. Compared with the responding of cre and four cellulases genes to the carboxymethylcellulose sodium (CMC) and the simple carbon source (lactose), the effect of CRE was only related to the concentration of reducing sugars...
November 23, 2016: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27879049/double-helix-structure-in-carrageenan-metal-hydrogels-a-general-approach-to-porous-metal-sulfides-carbon-aerogels-with-excellent-sodium-ion-storage
#9
Daohao Li, Dongjiang Yang, Xianfeng Yang, Yu Wang, Ziqi Guo, Yanzhi Xia, Shenglei Sun, Shaojun Guo
The metal sulfide-carbon nanocomposite is a new class of anode material for sodium ion batteries, but its development is restricted by its relative poor rate ability and cyclic stability. Herein, we report the use of double-helix structure of carrageenan-metal hydrogels for the synthesis of 3D metal sulfide (Mx Sy ) nanostructure/carbon aerogels (CAs) for high-performance sodium-ion storage. The method is unique, and can be used to make multiple Mx Sy /CAs (such as FeS/CA, Co9 S8 /CA, Ni3 S4 /CA, CuS/CA, ZnS/CA, and CdS/CA) with ultra-small nanoparticles and hierarchical porous structure by pyrolyzing the carrageenan-metal hydrogels...
November 23, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27874277/graphite-lini0-5mn1-5o4-cells-based-on-environmentally-friendly-in-water-made-electrodes
#10
Francesca De Giorgio, Nina Laszczynski, Jan von Zamory, Marina Mastragostino, Catia Arbizzani, Stefano Passerini
The performance of graphite//LiNi0.5Mn1.5O4 (LNMO) cells whose both electrodes are made using water-soluble sodium carboxymethyl cellulose (CMC) binder is reported for the first time. The full cell performed outstandingly at 400 cycles in the conventional electrolyte ethylene carbonate: dimethyl carbonate - 1M LiPF6 and the delivered specific energy at the 100th, 200th, 300th and 400th cycle corresponded to 82%, 78%, 73% and 66% of the initial energy value of 259 Wh kg-1 referred to the sum of the two electrode composite weights...
November 22, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27871380/an-improved-amperometric-l-lactate-biosensor-based-on-covalent-immobilization-of-microbial-lactate-oxidase-onto-carboxylated-multiwalled-carbon-nanotubes-copper-nanoparticles-polyaniline-modified-pencil-graphite-electrode
#11
Kusum Dagar, C S Pundir
An improved amperometric l-lactate biosensor was constructed based on covalent immobilization of lactate oxidase (LOx) from Pediococcus species onto carboxylated multiwalled carbon nanotubes (cMWCNT)/copper nanoparticles (CuNPs)/polyaniline (PANI) hybrid film electrodeposited on the surface of a pencil graphite electrode (PGE). The enzyme electrode was characterized by cyclic voltammetry (CV), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and electrochemical impedance spectroscopy (EIS), while CuNPs synthesized by chemical reduction method, were characterized by transmission electron microscopy (TEM), UV spectrascopy and X-ray diffraction (XRD)...
January 2017: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27868364/production-and-characterization-of-polyhydroxybutyrate-from-vibrio-harveyi-mccb-284-utilizing-glycerol-as-carbon-source
#12
Sowmya P Mohandas, Linu Balan, N Lekshmi, Sherine Sonia Cubelio, Rosamma Philip, I S Bright Singh
AIM: Production and characterization of polyhydroxybutyrate (PHB) from moderately halophilic bacterium Vibrio harveyi MCCB 284 isolated from tunicate Phallusia nigra. METHODS AND RESULTS: Twenty five bacterial isolates were obtained from tunicate samples and three among them exhibited an orange fluorescence in Nile red staining indicating the presence of PHB. One of the isolates, MCCB 284, which showed rapid growth and good polymer yield, was identified as V. harveyi...
November 21, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27864702/selective-spectrofluorimetric-method-with-enhanced-sensitivity-for-determination-of-silodosine-in-dosage-form-and-human-plasma-application-to-stability-studies-and-content-uniformity-testing
#13
Mahmoud A Omar, Abdel-Maaboud I Mohamed, Sayed M Derayea, Mohamed A Hammad, Abobakr A Mohamed
A novel, sensitive and selective spectrofluorimetric method has been developed and validated for determination of silodosine (SLD) in its dosage form and human plasma. The method is based on nucleophilic substitution reaction of SLD with 5-(dimethylamino) naphthalene-1-sulfonyl chloride (dansyl chloride) in presence of 5.0 × 10(-4) M sodium carbonate (pH 10.50) to yield a highly fluorescent derivative that was measured at 435 nm after excitation at 347 nm. The different experimental parameters affecting the development and stability of the reaction product were carefully studied and optimized...
November 19, 2016: Journal of Fluorescence
https://www.readbyqxmd.com/read/27864059/biosynthesis-and-physicochemical-characterization-of-a-bacterial-polysaccharide-polyamide-blend-applied-for-microfluidics-study-in-porous-media
#14
Maryam Ijadi Bajestani, Seyyed Mohammad Mousavi, Arezou Jafari, Seyed Abbas Shojaosadati
Screening among some new isolated bacteria from oily samples, which were capable of producing extracellular polymeric substances (EPSs), one was selected and identified as Bacillus sonorensis. An efficient micro-total analysis approach was carried out to assay the produced EPSs by this bacterium. Sucrose and yeast concentrations as carbon and nitrogen sources, respectively, sodium salt concentration and initial pH were selected to be the variables in experimental design. Production of EPS in optimal condition was increased by 5...
November 15, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27860417/an-electrolyte-for-reversible-cycling-of-na-metal-and-na-intercalation-compounds
#15
Lukas Schafzahl, Ilie Hanzu, Martin Wilkening, Stefan A Freunberger
Na battery chemistries show poor passivation behavior of low voltage Na storage compounds and Na metal with organic carbonate based electrolytes adopted from Li-ion batteries. A suitable electrolyte remains therefore a major challenge for establishing Na batteries. Here we report highly concentrated sodium bis(fluorosulfonyl)imide (NaFSI) in dimethoxyethane (DME) electrolytes that forms a stable solid electrolyte interface on anode materials. This permitted non-dendritic Na metal cycling with ~98 % coulombic efficiency as shown for up to 300 cycles...
November 18, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27859284/comparison-of-rehydration-techniques-for-fingerprinting-the-deceased-after-mummification
#16
Chun-Chieh Chen, Chao-Kai Yang, Chun-Yu Chen, Henry C Lee, Sheng-Meng Wang
Postmortem decay causes fingertip decomposition, desiccation, shriveling, and rigidity, reducing the possibility of obtaining sufficiently clear fingerprints for identification. In this study, five rehydration solutions (ammonium hydroxide, sodium carbonate, potassium hydroxide, urea, and warm water) followed by three fingerprint recording methods (photograph, inking roll, and dusting tape) were investigated to process mummified fingertips from an unidentified cadaver. The results show that sodium carbonate treatment is the most effective for minutiae restoration, followed by ammonium hydroxide treatment...
November 10, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27855492/sodium-ascorbate-kills-candida-albicans-in-vitro-via-iron-catalyzed-fenton-reaction-importance-of-oxygenation-and-metabolism
#17
Pinar Avci, Fernanda Freire, Andras Banvolgyi, Eleftherios Mylonakis, Norbert M Wikonkal, Michael R Hamblin
AIM: Ascorbate can inhibit growth and even decrease viability of various microbial species including Candida albicans. However the optimum conditions and the mechanism of action are unclear. Materials/methodology: Candida albicans shaken for 90 min in a buffered solution of ascorbate (90 mM) gave a 5-log reduction of cell viability, while there was no killing without shaking, in growth media with different carbon sources or at 4°C. Killing was inhibited by the iron chelator 2,2'-bipyridyl...
November 18, 2016: Future Microbiology
https://www.readbyqxmd.com/read/27855391/suppression-of-microrna-219-5p-activates-keratinocyte-growth-factor-to-mitigate-severity-of-experimental-cirrhosis
#18
Li Chen, Xiang Cui, Peng Li, Cong Feng, Lili Wang, Hao Wang, Xuan Zhou, Bo Yang, Faqin Lv, Tanshi Li
BACKGROUND/AIMS: Keratinocyte growth factor (KGF) plays a critical role in prevention of cirrhosis and enhancement of liver regeneration. However, the molecular regulation of KGF in liver is unknown. MicroRNAs (miRNAs) control the pathogenesis of cirrhosis, whereas the exact involved miRNAs and molecular signaling pathways remain ill-defined. Here we addressed these questions. METHODS: We examined the correlation of the levels of miR-219-5p and KGF in the liver biopsies from patients with liver diseases...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27854056/bioreductive-deposition-of-highly-dispersed-ag-nanoparticles-on-carbon-nanotubes-with-enhanced-catalytic-degradation-for-4-nitrophenol-assisted-by-shewanella-oneidensis-mr-1
#19
Xiaojie Song, Xianyang Shi
Biogenetic nanomaterials research provides insights and valuable implications for the green synthesis of nanomaterials and auxiliary biodegradation behaviors. Ag nanoparticles (Ag NPs) fabricated on multiwalled carbon nanotubes (MWNTs) (Ag/MWNTs nanocomposites) are prepared in situ assisted by Shewanella oneidensis MR-1 (S. oneidensis MR-1) that provide respiratory pathway to transmit electrons. The Ag/MWNTs nanocomposites are characterized by a scanning electron microscopy (SEM), an energy dispersive X-ray (EDX), a transmission electron microscopy (TEM), an X-ray diffraction (XRD), and an X-ray photoelectron spectroscopy (XPS), respectively...
November 16, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27845454/incorporating-conjugated-carbonyl-compounds-into-carbon-nanomaterials-as-electrode-materials-for-electrochemical-energy-storage
#20
Guanhui Yang, Yu Zhang, Yanshan Huang, Muhammad Imran Shakir, Yuxi Xu
The increasing demand for energy and growing concerns for environmental issues are promoting the development of organic electrode materials. Among these, conjugated carbonyl compounds (CCCs) represent one of the most attractive and promising candidates for sustainable and eco-benign energy storage devices in the coming future. However, most of the current compounds suffer from dissolution in organic electrolytes and low electronic conductivity, which result in severe capacity decay and poor rate performance...
November 15, 2016: Physical Chemistry Chemical Physics: PCCP
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