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https://www.readbyqxmd.com/read/27935614/hybrid-porous-bamboo-like-cnts-embedding-ultrasmall-licrtio4-nanoparticles-as-high-rate-and-long-life-anode-materials-for-lithium-ion-batteries
#1
Yakun Tang, Lang Liu, Hongyang Zhao, Shasha Gao, Yan Lv, Lingbing Kong, Junhong Ma, Dianzeng Jia
Compared with Li4Ti5O12, LiCrTiO4 with the same spinel structure exhibits superior conductivity and Li(+) diffusion properties. However, there has been no extensive study on LiCrTiO4 as an anode material in lithium ion batteries, due to its pulverization, loss of electrical contact, and particle aggregation. A unique architecture based on hybrid porous CNTs embedding ultrasmall LiCrTiO4 nanoparticles (6 ± 2 nm) was designed by using a facile sol-gel process combined with subsequent heat treatment. As an anode for lithium ion batteries, due to the absence of the aforementioned problems, the electrode exhibited high reversible capacity, excellent rate capability and superior long-term cycling stability at high current densities...
December 9, 2016: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/27935610/comparison-of-nanomedicine-based-chemotherapy-photodynamic-therapy-and-photothermal-therapy-using-reduced-graphene-oxide-for-the-model-system
#2
Jingjing Liu, Kai Liu, Liangzhu Feng, Zhuang Liu, Ligeng Xu
Given the complexity of tumors, several nanomaterial-based treatment modalities like chemotherapy (CT), photodynamic therapy (PDT) and photothermal therapy (PTT) have been developed for combating cancers. However, it is still unclear which strategy is better or how to select optimal approaches for combination treatment since each strategy has been investigated under different conditions. Inspired by its good payload capacity and unique near-infrared absorption, reduced graphene oxide (rGO) was selected in this study as the carrier for loading of doxorubicin (DOX), a chemotherapy drug, and chlorin e6 (Ce6), a photosensitizer...
December 9, 2016: Biomaterials Science
https://www.readbyqxmd.com/read/27934258/capturing-lithium-from-wastewater-using-a-fixed-bed-packed-with-3-d-mno2-ion-cages
#3
Xubiao Luo, Kai Zhang, Jinming Luo, Shenglian Luo, John Crittenden
3-D MnO2 ion cages (CMO) were fabricated and shown to have a high capacity for lithium removal from wastewater. CMO had a maximum Li(I) adsorption capacity of 56.87 mg/g, which is 1.38 times greater than the highest reported value (41.36 mg/g). X-ray photoelectron spectroscopy indicated that the stability of the -Mn-O-Mn-O- skeleton played an essential role in Li adsorption. The lattice clearance had a high charge density, forming a strong electrostatic field. The Dubinin-Ashtakhov (DA) site energy distribution model based on Polanyi theory described the linear increase of Li adsorption capacity (Q0) with increasing temperature (Q0 = k3 × Em + d3 = k3 × (a × T) + d3)...
December 6, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27933831/improved-cycling-stability-and-fast-charge-discharge-performance-of-cobalt-free-lithium-rich-oxides-by-magnesium-doping
#4
Ting-Feng Yi, Yan-Mei Li, Shuang-Yuan Yang, Yan-Rong Zhu, Ying Xie
Layered Li-rich, Co-free, and Mn-based cathode material, Li1.17Ni0.25-xMn0.58MgxO2 (0 ≤ x ≤ 0.05), was successfully synthesized by a coprecipitation method. All prepared samples have typical Li-rich layered structure, and Mg has been doped in the Li1.17Ni0.25Mn0.58O2 material successfully and homogeneously. The morphology and the grain size of all material are not changed by Mg doping. All materials have a estimated size of about 200 nm with a narrow particle size distribution. The electrochemical property results show that Li1...
November 30, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27933114/instantaneous-formation-of-siox-nanocomposite-for-high-capacity-lithium-ion-batteries-by-enhanced-disproportionation-reaction-during-plasma-spray-physical-vapor-deposition
#5
Tohru Tashiro, Masashi Dougakiuchi, Makoto Kambara
Nanocomposite SiOx particles have been produced by a single step plasma spray physical vapor deposition (PS-PVD) through rapid condensation of SiO vapors and the subsequent disproportionation reaction. Core-shell nanoparticles, in which 15 nm crystalline Si is embedded within the amorphous SiOx matrix, form under typical PS-PVD conditions, while 10 nm amorphous particles are formed when processed with an increased degree of non-equilibrium effect. Addition of CH4 promotes reduction in the oxygen content x of SiO x , and thereby increases the Si volume in a nanocomposite particle...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27932874/bronchodilator-response-of-advanced-lung-function-parameters-depending-on-copd-severity
#6
Linnea Jarenbäck, Göran Eriksson, Stefan Peterson, Jaro Ankerst, Leif Bjermer, Ellen Tufvesson
BACKGROUND: COPD is defined as partly irreversible airflow obstruction. The response pattern of bronchodilators has not been followed in advanced lung function parameters. PURPOSE: The aim of this study was to investigate bronchodilator response pattern in advanced lung function parameters in a continuous fashion along forced expiratory volume in 1 second (FEV1) percent predicted (%p) in COPD patients and controls. PATIENTS AND METHODS: Eighty-one smokers/ex-smokers (41 controls and 40 COPD) performed spirometry, body plethysmography, impulse oscillometry and single-breath helium dilution carbon monoxide diffusion at baseline, after salbutamol inhalation and then after an additional inhalation of ipratropium...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27932673/are-there-sex-differences-in-the-capillary-blood-volume-and-diffusing-capacity-response-to-exercise
#7
Melissa M Bouwsema, Vincent Tedjasaputra, Michael K Stickland
Previous work suggests that women may exhibit a greater respiratory limitation to exercise compared to height-matched men. Diffusion capacity (DLCO) increases with incremental exercise, and the smaller lungs of women may limit membrane diffusing capacity (Dm) and pulmonary capillary blood volume (Vc) in response to the increased oxygen demand. We hypothesized that females would have a lower DLCO, DLCO relative to cardiac output (DLCO/Q), Dm, Vc, and pulmonary transit time, secondary to lower Vc at peak exercise...
December 8, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27931683/in-silico-pass-analysis-and-determination-of-antimycobacterial-antifungal-and-antioxidant-efficacies-of-maslinic-acid-in-an-extract-rich-in-pentacyclic-triterpenoids
#8
Prasad G Jamkhande, Shahbaz K Pathan, Shailesh J Wadher
OBJECTIVE/BACKGROUND: Microbial infections such as tuberculosis is a major cause of mortality worldwide. Plant-derived phytochemicals have a long history of providing much-needed novel therapeutics. Triterpenoids are among the prominent phytochemicals that possess numerous biological activities. Among them is maslinic acid (MA), a biologically active olean-type pentacyclic triterpenoid. In search of a novel antimicrobial agent, we aimed to evaluate the antimicrobial potential of MA. METHODS: Antibacterial and antifungal activity was evaluated through the agar well diffusion method...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27930883/enhancing-sodium-ion-battery-performance-by-strongly-binding-nanostructured-sb2s3-on-sulfur-doped-graphene-sheets
#9
Xunhui Xiong, Guanhua Wang, Yuwei Lin, Ying Wang, Xing Ou, Fenghua Zheng, Chenghao Yang, Jeng-Han Wang, Meilin Liu
Sodium ion batteries (SIBs) have been considered as promising alternative to lithium ion batteries (LIBs) for large-scale energy storage. However, their inferior electrochemical performances, especially cyclability become the major challenge for further development of SIBs. Large volume change and sluggish diffusion kinetics are generally considered to be responsible for the fast capacity degradation. Here we report the strong chemical bonding of nanostructured Sb2S3 on sulfur-doped graphene sheets (Sb2S3/SGS) that enables stable capacity retention of 83% for 900 cycles with high capacities and excellent rate performances...
December 8, 2016: ACS Nano
https://www.readbyqxmd.com/read/27925428/measuring-sedentary-behaviours-in-patients-with-idiopathic-pulmonary-fibrosis-using-wrist-worn-accelerometers
#10
Chris Atkins, Mark Baxter, Andrew Jones, Andrew Wilson
Introduction - Idiopathic pulmonary fibrosis (IPF) patients suffer increasing functional limitation with disease worsening disease. Increasing time in sedentary behaviour has been associated with poorer quality of life. Determining thresholds for activity in patients with respiratory disease is difficult due to variable cardiorespiratory limitations between individuals. Measuring sedentary behaviour is not confounded by this limitation and may be a better measurement of activity in patients with respiratory disease...
December 7, 2016: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/27922730/anchoring-nitrogen-doped-tio2-nanocrystals-on-nitrogen-doped-3d-graphene-frameworks-for-enhanced-lithium-storage
#11
Yan Yu, Xiaowu Liu, Zhenzhong Yang, Lin Gu
An advanced architecture design of nitrogen doped TiO2 anchored on nitrogen doped 3D graphene frameworks composites (denoted as N-TiO2/N-3D GFs) have been fabricated by a facile template process and further NH3 treatment. The 3D graphene framework allows the electrolyte penetrate into the inverse opal structure and possess high electronic conductivity. The intimate contact between the N-TiO2 and the graphene suppresses the growth and aggregation of TiO2 nanoparticles during heating process, leading to decreased Li+ diffusion length...
December 6, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27920514/usefulness-of-the-6-minute-walk-test-as-a-screening-test-for-pulmonary-arterial-enlargement-in-copd
#12
Yutaro Oki, Masahiro Kaneko, Yukari Fujimoto, Hideki Sakai, Shogo Misu, Yuji Mitani, Takumi Yamaguchi, Hisafumi Yasuda, Akira Ishikawa
PURPOSE: Pulmonary hypertension and exercise-induced oxygen desaturation (EID) influence acute exacerbation of COPD. Computed tomography (CT)-detected pulmonary artery (PA) enlargement is independently associated with acute COPD exacerbations. Associations between PA to aorta (PA:A) ratio and EID in patients with COPD have not been reported. We hypothesized that the PA:A ratio correlated with EID and that results of the 6-minute walk test (6MWT) would be useful for predicting the risk associated with PA:A >1...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27919562/impact-of-pre-equilibration-and-diffusion-limited-release-kinetics-on-effluent-concentration-in-column-leaching-tests-insights-from-numerical-simulations
#13
Michael Finkel, Peter Grathwohl
Column leaching tests have become a standard method for assessing leaching of pollutants from materials used, e.g., for road and railway constructions and in landscaping measures. Column tests showed to be practical in laboratories yielding robust and reproducible results. However, considerable uncertainty still exists related particularly to the degree of equilibration of the pore water with the solids during preparation (pre-equilibration) and percolation of the column. We analyse equilibration time scales and sensitivity of concentrations in column leachate with respect to initial conditions in a series of numerical experiments covering a broad spectrum of material and solute properties...
December 2, 2016: Waste Management
https://www.readbyqxmd.com/read/27916736/the-history-of-the-pulmonary-diffusing-capacity-for-nitric-oxide-dl-no
#14
Colin Dr Borland, Hervé Guénard
The DL,NO (TL,NO) had its unexpected origins in the Paris "events" of 1968 and the unsuccessful efforts of the UK tobacco industry in the 1970's to create a "safer cigarette". Adoption of the technique has been slow due to the instability of NO in air, lack of standardisation of the technique and lack of agreement as to whether DL,NO is equal to or merely reflects membrane diffusing capacity (DM.) With the availability of inexpensive analysers, standardisation of the technique and publication of reference equations we believe that its worldwide use will increase...
December 1, 2016: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/27916135/integrating-chemical-imaging-of-cationic-trace-metal-solutes-and-ph-into-a-single-hydrogel-layer
#15
Christoph Hoefer, Jakob Santner, Sergey M Borisov, Walter W Wenzel, Markus Puschenreiter
Gel-based, two-dimensional (2D) chemical imaging techniques are versatile methods for investigating biogeochemically active environments at high spatial resolution (sub-mm). State-of-the-art solute imaging techniques, such as diffusive gradients in thin films (DGT) and planar optodes (PO), employ passive solute sampling or sensing. Combining these methods will provide powerful tools for studying the biogeochemistry of biological niches in soils and sediments. In this study we aimed at developing a combined single-layer gel for direct pH imaging using PO and sampling of anionic and cationic solutes by DGT, with subsequent analysis of the bound solutes by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)...
January 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27916127/in-situ-determination-of-v-v-by-diffusive-gradients-in-thin-films-and-inductively-coupled-plasma-mass-spectrometry-techniques-using-amberlite-ira-410-resin-as-a-binding-layer
#16
Karen Silva Luko, Amauri Antonio Menegário, Carlos Alfredo Suárez, Makenly Tafurt-Cardona, Jorge Henrique Pedrobom, Ana Marta Cavinato Marchini Rolisola, Everton Tiago Sulato, Chang Hung Kiang
Amberlite IRA-410 anionic exchange resin was evaluated as the binding layer for sampling V(V) by using Diffusive Gradients in Thin Films (DGT). V(V) was determined by inductively coupled plasma mass spectrometry (ICP-MS). Mass vs. time DGT deployments (ionic strength = 0.03 mol L(-1) NaNO3, pH = 5.6 and T = 23.5 ± 0.5 °C) was characterized by excellent linear relationship (R(2) = 0.9993) and a significant retention of V(V) by the binding layer. An exchange capacity of at least 40 μg V g(-1) resin was achieved for the proposed binding layer...
January 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27913735/preoperative-pulmonary-rehabilitation-for-marginal-function-lung-cancer-patients
#17
Asra Hashmi, Frank A Baciewicz, Ayman O Soubani, Shirish M Gadgeel
BACKGROUND: This study aimed to evaluate the impact of preoperative pulmonary rehabilitation in lung cancer patients undergoing pulmonary resection surgery with marginal lung function. METHODS: Short-term outcomes of 42 patients with forced expiratory volume in 1 s < 1.6 L who underwent lung resection between 01/2006 and 12/2010 were reviewed retrospectively. They were divided into group A (no preoperative pulmonary rehabilitation) and group B (receiving pulmonary rehabilitation)...
December 2, 2016: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/27913083/different-biosorption-mechanisms-of-uranium-vi-by-live-and-heat-killed-saccharomyces-cerevisiae-under-environmentally-relevant-conditions
#18
Tieshan Wang, Xinyan Zheng, Xiaoyu Wang, Xia Lu, Yanghao Shen
Uranium adsorption mechanisms of live and heat-killed Saccharomyces cerevisiae in different pH values and biomass concentrations were studied under environmentally relevant conditions. Compared with live cells, the adsorption capacity of heat-killed cells is almost one order of magnitude higher in low biomass concentration and highly acidic pH conditions. To explore the mesoscopic surface interactions between uranium and cells, the characteristic of uranium deposition was investigated by SEM-EDX, XPS and FTIR...
November 29, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/27912137/a-novel-continuous-two-phase-partitioning-bioreactor-operated-with-polymeric-tubing-performance-validation-for-enhanced-biological-removal-of-toxic-substrates
#19
M Concetta Tomei, Domenica Mosca Angelucci, Andrew J Daugulis
A continuous two-phase partitioning bioreactor (C-TPPB), operated with coiled tubing made of the DuPont polymer Hytrel 8206, was tested for the bioremediation of 4-chlorophenol, as a model toxic compound. The tubing was immersed in the aqueous phase, with the contaminated water flowing tube-side, and an adapted microbial culture suspended in the bioreactor itself, with the metabolic demand of the cells creating a concentration gradient to cause the substrate to diffuse into the bioreactor for biodegradation...
November 29, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27912123/synthesis-of-hierarchical-porous-zinc-oxide-zno-microspheres-with-highly-efficient-adsorption-of-congo-red
#20
Chunsheng Lei, Meng Pi, Chuanjia Jiang, Bei Cheng, Jiaguo Yu
Hierarchical porous zinc oxide (ZnO) was successfully synthesized via a facile hydrothermal method followed by calcination, and characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, nitrogen adsorption-desorption, and Fourier transform infrared spectroscopy analyses. The as-prepared porous ZnO exhibits microsphere morphologies with diameters of 6-8μm, which are assembled from two-dimensional nanosheets. The as-prepared hierarchical porous ZnO microspheres possessed high specific surface areas (57m(2)/g), and were evaluated for adsorption of Congo red (CR) in aqueous solution...
November 15, 2016: Journal of Colloid and Interface Science
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