Read by QxMD icon Read

Sodium carbonate

Biswa Nath Bhadra, Pill Won Seo, Nazmul Abedin Khan, Sung Hwa Jhung
Two highly porous Co-based metal-azolate frameworks (MAFs), MAF-5(Co) and MAF-6(Co), which are isostructural with MAF-5(Zn) and MAF-6(Zn), respectively, were first synthesized in high yield and purity at room temperature. The syntheses compared two mixing methods, slow and fast, using cobalt acetate as the metal ion (Co(2+)) source and 2-ethylimidazole as the ligand. Triethylamine was applied as an additive/promoter in aqueous/ethanol solutions, and benzene and cyclohexane were used as hydrophobic templates...
October 20, 2016: Inorganic Chemistry
Thrinathreddy Ramireddy, Neeraj Sharma, Tan Xing, Ying Chen, Jeremie Leforestier, Alexey M Glushenkov
Sodium-ion batteries are in the spotlight as viable alternatives to lithium-ion batteries in stationary storage and power grid applications. Among possible anode materials, Sb is one of the interesting candidates due to a combination of battery-type potential plateaus in the charge-discharge profiles, high capacity (theoretical capacity of 660 mAh g(-1)) and demonstrated good cyclic stability. The influence of Sb particle size (particularly at the nanoscale range) and the composition of Sb-carbon composites on the electrode performance, stability and charge storage mechanism is systematically evaluated here for the first time...
October 18, 2016: ACS Applied Materials & Interfaces
Peng Zheng, Ting Liu, Shouwu Guo
Superior first-cycle Coulomb efficiency (above 80%) is displayed by filter paper-derived micro-nano structure hard carbon, and it delivers a high reversible capacity of 286 mAh g(-1) after 100 cycles as the anode for Na-ion battery at 20 mA g(-1). These advantageous performance characteristics are attributed to the unique micro-nano structure, which reduced the first irreversible capacity loss by limiting the contact between the electrode and electrolyte, and enhanced the capacity by accelerating electron and Na-ion transfer through inter-connected nano-particles and nano-pores, respectively...
October 18, 2016: Scientific Reports
Xin Zhang, Ruyan Wu, Zeyi Wang, Mingxia Gao, Hongge Pan, Yongfeng Liu
Sodium alanate (NaAlH4) has attracted intense interest as a prototypical high-density hydrogen storage material. However, poor reversibility and slow kinetics limit its practical applications. In this work, a nanocrystalline ZrO2@C catalyst is synthesized using Uio-66(Zr) as a precursor and furfuryl alcohol (FA) as a carbon source. The as-synthesized ZrO2@C exhibits good catalytic activity for dehydrogenation and hydrogenation of NaAlH4. The NaAlH4-7 wt% ZrO2@C sample releases hydrogen starting from 126 °C and re-absorbs starting from 54 °C, and these temperatures are reduced by 71 °C and 36 °C, respectively, relative to those of pristine NaAlH4...
October 17, 2016: Chemistry, An Asian Journal
Zhen Zhang, Yongling An, Xiaoyan Xu, Chenglong Dong, Jinkui Feng, Lijie Ci, Shenglin Xiong
Graphene@nitrogen doped carbon@ultrafine TiO2 nanoparticles (G-NC@TiO2) with porous structure are obtained through annealing the precursor of graphene oxide/metal-organic frameworks (MOFs) for the first time. As an anode material for sodium ion batteries (SIB), the G-NC@TiO2 composite can deliver an excellent capacity retention of 93% even after 5000 cycles, and a superior rate capability.
October 17, 2016: Chemical Communications: Chem Comm
Darcie L Stack, Jason D Masuda
The title compound, C27H38ClN2(+)·C32H12BF24(-), was synthesized by reacting the product formed from a previous reaction between 1,3-bis-(2,6-diiso-propyl-phen-yl)imidazolinium-2-carboxyl-ate (SIPrCO2), and SOCl2, with sodium tetra-kis-[3,5-bis-(tri-fluoro-meth-yl)phen-yl]borate (NaBARF). In the cation, the imidazole ring is in a half-chair conformation and the formerly carbene carbon atom is bonded in a distorted trigonal-planar geometry with N-C-Cl angles of 122.96 (16) and 122.21 (16)° and an N-C-N angle of 114...
October 1, 2016: Acta Crystallographica. Section E, Crystallographic Communications
Lauren D Wu, L Renee Ruhaak, Carlito B Lebrilla
Human milk oligosaccharides (HMOs) are a highly abundant constituent in human milk, and its protective and prebiotic properties have attracted considerable attention. HMOs have been shown to directly and indirectly benefit the overall health of the infant due to a number of functions including serving as a beneficial food for gut bacteria, block to pathogens, and aiding in brain development. Researchers are currently exploring whether these structures may act as possible disease and nutrition biomarkers. Because of this, rapid-throughput methods are desired to investigate biological activity in large patient sets...
2017: Methods in Molecular Biology
Cian McGinley, David John Bishop
This study measured the adaptive response to exercise training for each of the acid/base transport protein families, including providing isoform-specific evidence for the monocarboxylate transporter (MCT)1/4 chaperone protein basigin and for the electrogenic sodium/bicarbonate cotransporter (NBCe)1. We investigated whether 4 weeks of work-matched, high-intensity interval training (HIIT), performed either just above the lactate threshold (HIITΔ20; n = 8), or close to peak aerobic power (HIITΔ90; n = 8), influenced adaptations in acid/base transport protein abundance, non-bicarbonate muscle buffer capacity (βmin vitro), and exercise capacity in active men...
October 14, 2016: Journal of Applied Physiology
Doongar R Chaudhary, Aditya P Rathore, Raghawendra Kumar, Bhavanath Jha
Microbial communities in intertidal coastal soils respond to a variety of environmental factors related to resources availability, habitat characteristics and vegetation. These intertidal soils of India are dominated with Salicornia brachiata, Aeluropus lagopoides and Suaeda maritima halophytes which play a significant role in carbon sequestration, nutrient cycling and improving micro-environment. However, the relative contribution of edaphic factors, halophytes, rhizosphere and bulk sediments on microbial community composition is poorly understood in the intertidal sediments...
October 14, 2016: International Journal of Phytoremediation
Junming Li, Yun Fu, Xiaodong Shi, Zhenming Xu, Zhian Zhang
Urchin-like ZnS microspheres decorated with nitrogen-doped carbon (ZnS@NC) are designed by a facile two-step method, in which the unrchin-like ZnS microspheres were coated by polydopamine and then calcined at inert gas ambient. When employed as the anode material for lithium ion batteries (LIBs) and sodium ion batteries (SIBs), the ZnS@NC electrode can exhibit a reversible lithium storage capacity of 690 mAh g-1 after 100 cycles at 100 mA g-1 and a reversible sodium storage capacity of 460 mAh g-1 after 80 cycles at 200 mA g-1...
October 14, 2016: Chemistry: a European Journal
Jian Cheng, Wei Zhuang, Nana Li, Chenglun Tang, Hanjie Ying
Low D-ribose production by B. subtilis was resulted from plenty of acid formation as responsible for carbon overflow. An approach of co-feeding glucose and sodium citrate is developed here and proved to be useful for D-ribose production. This strategy is critical because it affects the cell concentration, the productivity of D-ribose and, especially, the formation of by-products such as acetoin, lactate, and acetate. D-ribose production was increased by 59.6% from 71.06 to 113.41 g l(-1) without acid formation via co-feeding of 2...
October 14, 2016: Letters in Applied Microbiology
Qizhen Wei, Zhiyu Song, Jing Nie, Hailun Xia, Fujiang Chen, Zuguang Li, Mawrong Lee
A pretreatment method named tablet-effervescence-assisted dissolved carbon flotation was introduced for the determination of four triazole fungicides in environmental water. In this method, the use of effervescent tablet composed of nontoxic sodium carbonate and sodium dihydrogen phosphate could generate CO2 in situ to assist the dispersion of extraction solvent and to accelerate mass transfer of target analytes. In addition, the simple phase separation simply based on the rising of low-density organic solvent from the aqueous phase was applied rather than the application of apparatus, which demonstrated the potential for on-site extraction in the field...
October 13, 2016: Journal of Separation Science
Lina Yao, Hui Shen, Nan Wang, Jaspaul Tatlay, Liang Li, Tin Wee Tan, Yuan Kun Lee
Microalgal neutral lipids (mainly in the form of triacylglycerols (TAGs)), feasible substrates for biofuel, are typically accumulated during the stationary growth phase. To make microalgal biofuels economically competitive with fossil fuels, generating strains that trigger TAG accumulation from the exponential growth phase is a promising biological approach. The regulatory mechanisms to trigger TAG accumulation from the exponential growth phase (TAEP) are important to be uncovered for advancing economic feasibility...
October 13, 2016: Plant Biotechnology Journal
Yang Zhao, Ye Zhang, Hao Sun, Xiaoli Dong, Jingyu Cao, Lie Wang, Yifan Xu, Jing Ren, Yunil Hwang, In Hyuk Son, Xianliang Huang, Yonggang Wang, Huisheng Peng
Flexible lithium-ion batteries are critical for the next-generation electronics. However, during the practical application, they may break under deformations such as twisting and cutting, causing their failure to work or even serious safety problems. A new family of all-solid-state and flexible aqueous lithium ion batteries that can self-heal after breaking has been created by designing aligned carbon nanotube sheets loaded with LiMn2 O4 and LiTi2 (PO4 )3 nanoparticles on a self-healing polymer substrate as electrodes, and a new kind of lithium sulfate/sodium carboxymethylcellulose serves as both gel electrolyte and separator...
October 12, 2016: Angewandte Chemie
Sigrun Reumann, Piotr Lisik
To date, less than 150 proteins have been located to plant peroxisomes, indicating that unbiased large-scale approaches such as experimental proteome research are required to uncover the remaining yet unknown metabolic functions of this organelle as well as its regulatory mechanisms and membrane proteins. For experimental proteome research, Arabidopsis thaliana is the model plant of choice and an isolation methodology that obtains peroxisomes of sufficient yield and high purity is vital for research on this organelle...
2017: Methods in Molecular Biology
Yu Kanasaki, Yasuyuki Kobayashi, Keiko Gotoh
Removal process of a fatty acid from four substrates was monitored using a quartz crystal microbalance (QCM). Model substrates included carbon, silica, and gold sputtered electrodes and a polymer film prepared on a gold sputtered electrode. Stearic acid (SA), a model solid oily contaminant, was deposited on the substrates as an ultra-thin layer using the Langmuir-Blodgett (LB) technique. Cleaning tests of the SA-LB films were performed in aqueous solutions containing sodium chloride (NaCl), sodium hydroxide (NaOH), and/or sodium dodecyl sulfate (SDS)...
2016: Journal of Oleo Science
Lianbo Ma, Renpeng Chen, Yi Hu, Guoyin Zhu, Tao Chen, Hongling Lu, Jia Liang, Zuoxiu Tie, Zhong Jin, Jie Liu
To improve the energy storage performance of carbon-based materials, considerable attention has been paid to the design and fabrication of novel carbon architectures with structural and chemical modifications. Herein, we report that hierarchical porous nitrogen-rich carbon (HPNC) nanospheres originating from acidic etching of metal carbide/carbon hybrid nanoarchitectures can be employed as high-performance anode materials for both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). The structural advantages of HPNC nanospheres are that the exceptionally-high content of nitrogen (17...
October 10, 2016: Nanoscale
Min-Kun Kim, Seung-Ho Yu, Aihua Jin, Jin Kim, In-Hwan Ko, Kug-Seung Lee, Junyoung Mun, Yung-Eun Sung
A bismuth oxide electrode, delivering high capacity, as an anode material for sodium-ion batteries was simply prepared. The electrochemical properties of bismuth oxide were studied by operando X-ray absorption near edge structure spectroscopy and ex situ X-ray diffraction methods. A bismuth oxide/carbon composite showed enhanced cycle stability at high current densities.
September 27, 2016: Chemical Communications: Chem Comm
Joshua M Stratford, Phoebe K Allan, Oliver Pecher, Philip A Chater, Clare P Grey
Operando(23)Na solid-state NMR and pair distribution function analysis experiments provide insights into the structure of hard carbon anodes in sodium-ion batteries. Capacity results from "diamagnetic" sodium ions first adsorbing onto pore surfaces, defects and between expanded layers, before pooling into larger quasi-metallic clusters/expanded carbon sheets at lower voltages.
October 13, 2016: Chemical Communications: Chem Comm
Changbao Zhu, Peter Kopold, Weihan Li, Peter A van Aken, Joachim Maier, Yan Yu
Transition metal sulfides have a great potential for energy storage due to the pronouncedly higher capacity (owing to conversion to metal or even alloy) than traditional insertion electrode materials. However, the poor cycling stability still limits the development and application in lithium and sodium ion batteries. Here, taking SnS as a model material, a novel general strategy is proposed to fabricate a 3D porous interconnected metal sulfide/carbon nanocomposite by the electrostatic spray deposition technique without adding any expensive carbonaceous materials such as graphene or carbon nanotube...
December 2015: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"