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https://www.readbyqxmd.com/read/27896337/a-multicomponent-assembly-approach-for-the-design-of-deep-desulfurization-heterogeneous-catalysts
#1
Yanqi Xu, Weimin Xuan, Mengmeng Zhang, Haralampos N Miras, Yu-Fei Song
Deep desulfurization is a challenging task and global efforts are focused on the development of new approaches for the reduction of sulfur-containing compounds in fuel oils. In this work, we have proposed a new design strategy for the development of deep desulfurization heterogeneous catalysts. Based on the adopted design strategy, a novel composite material of polyoxometalate (POM)-based ionic liquid-grafted layered double hydroxides (LDHs) was synthesized by an exfoliation/grafting/assembly process. The structural properties of the as-prepared catalyst were characterized using FT-IR, XRD, TG, NMR, XPS, BET, SEM and HRTEM...
November 29, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27890657/targeting-tumor-highly-expressed-lat1-transporter-with-amino-acid-modified-nanoparticles-toward-a-novel-active-targeting-strategy-in-breast-cancer-therapy
#2
Lin Li, Xingsheng Di, Mingrui Wu, Zhisu Sun, Lu Zhong, Yongjun Wang, Qiang Fu, Qiming Kan, Jin Sun, Zhonggui He
Designing active targeting nanocarriers with increased cellular accumulation of chemotherapeutic agents is a promising strategy in cancer therapy. Herein, we report a novel active targeting strategy based on the large amino acid transporter 1 (LAT1) overexpressed in a variety of cancers. Glutamate was conjugated to polyoxyethylene stearate as a targeting ligand to achieve LAT1-targeting PLGA nanoparticles. The targeting efficiency of nanoparticles was investigated in HeLa and MCF-7 cells. Significant increase in cellular uptake and cytotoxicity was observed in LAT1-targeting nanoparticles compared to the unmodified ones...
November 24, 2016: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/27885725/recyclable-and-green-triboelectric-nanogenerator
#3
Qijie Liang, Qian Zhang, Xiaoqin Yan, Xinqin Liao, Linhong Han, Fang Yi, Mingyuan Ma, Yue Zhang
A recyclable and green triboelectronic nanogenerator (TENG) is developed based on triboelectrification and designed cascade reactions. Once triggered by water, the TENG can fully dissolve and degrade into environmentally benign end products. With features of rapid dissolution, reproductivity, and green electronic, the TENG has potential of serving as clearable energy harvester and nanosensor for health monitoring and motion sensing.
November 25, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27865033/selective-production-of-carbon-monoxide-via-methane-oxychlorination-over-vanadyl-pyrophosphate
#4
Vladimir Paunović, Guido Zichittella, Réne Verel, Amol P Amrute, Javier Pérez-Ramírez
A catalytic process is demonstrated for the selective conversion of methane into carbon monoxide via oxychlorination chemistry. The process involves addition of HCl to a CH4 -O2 feed to facilitate C-H bond activation under mild conditions, leading to the formation of chloromethanes, CH3 Cl and CH2 Cl2 . The latter are oxidized in situ over the same catalyst, yielding CO and recycling HCl. A material exhibiting chlorine evolution by HCl oxidation, high activity to oxidize chloromethanes into CO, and no ability to oxidize CO, is therefore essential to accomplish this target...
November 16, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27863486/costs-of-conservative-management-of-early-stage-prostate-cancer-compared-to-radical-prostatectomy-a-claims-data-analysis
#5
Alina Brandes, Florian Koerber, Larissa Schwarzkopf, Matthias Hunger, Wolf H Rogowski, Raphaela Waidelich
BACKGROUND: Due to widespread PSA testing incidence rates of localized prostate cancer increase but curative treatment is often not required. Overtreatment imposes a substantial economic burden on health care systems. We compared the direct medical costs of conservative management and radical therapy for the management of early-stage prostate cancer in routine care. METHODS: An observational study design is chosen based on claims data of a German statutory health insurance fund for the years 2008-2011...
November 18, 2016: BMC Health Services Research
https://www.readbyqxmd.com/read/27858271/pilot-study-on-the-internal-exposure-to-heavy-metals-of-informal-level-electronic-waste-workers-in-agbogbloshie-accra-ghana
#6
Jürgen Wittsiepe, Torsten Feldt, Holger Till, Gerd Burchard, Michael Wilhelm, Julius N Fobil
Informal-level electronic waste (e-waste)-processing activities are performed at hotspots in developing countries such as India, China, and Ghana. These activities increase the ambient burden of heavy metals and contribute to the toxic exposure of the general population. However, few data exist on the internal exposure of populations involved in these informal activities and in close contact with fumes from the direct combustion of electronic waste products in these countries. Therefore, in a cross-sectional study design, we analyzed blood, urine, and hair samples from 75 e-waste workers residing in and/or working on a large e-waste recycling site in Agbogbloshie, Accra, Ghana, and compared the results against those of 40 individuals living in a suburb of Accra without direct exposure to e-waste recycling activities...
November 17, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27856054/task-specific-thioglycolate-ionic-liquids-for-heavy-metal-extraction-synthesis-extraction-efficacies-and-recycling-properties
#7
Sonja Platzer, Mega Kar, Raphlin Leyma, Sonia Chib, Alexander Roller, Franz Jirsa, Regina Krachler, Douglas R MacFarlane, Wolfgang Kandioller, Bernhard K Keppler
Eight novel task-specific ionic liquids (TSILs) based on the thioglycolate anion designed for heavy metal extraction have been prepared and characterized by (1)H and (13)C NMR, UV-Vis, infrared, ESI-MS, conductivity, viscosity, density and thermal properties. Evaluation of their time-resolved extraction abilities towards cadmium(II) and copper(II) in aqueous solutions have been investigated where distribution ratios up to 1200 were observed. For elucidation of the IL extraction mode, crystals were grown where Cd(II) was converted with an excess of S-butyl thioglycolate...
October 24, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27842821/magnetic-cellulose-ag-as-a-novel-eco-friendly-nanobiocomposite-to-catalyze-synthesis-of-chromene-linked-nicotinonitriles
#8
Ali Maleki, Hamed Movahed, Parisa Ravaghi
In this work, design, preparation and performance of magnetic cellulose/Ag nanobiocomposite as a recyclable and highly efficient heterogeneous nanocatalyst is described. Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) pattern, vibrating sample magnetometer (VSM) curve, field-emission scanning electron microscopy (FE-SEM) image, energy dispersive X-ray (EDX) analysis and thermogravimetric analysis/differential thermal analysis (TGA/DTA) were used for the characterization. Then, its activity was investigated in the synthesis of 2-amino-6-(2-oxo-2H-chromen-3-yl)-4-phenylnicotinonitrile derivatives...
January 20, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27827843/proposal-of-environmental-impact-assessment-method-for-concrete-in-south-korea-an-application-in-lca-life-cycle-assessment
#9
Tae Hyoung Kim, Sung Ho Tae
This study aims to develop a system for assessing the impact of the substances discharged from concrete production process on six environmental impact categories, i.e., global warming (GWP), acidification (AP), eutrophication (EP), abiotic depletion (ADP), ozone depletion (ODP), and photochemical oxidant creation (POCP), using the life a cycle assessment (LCA) method. To achieve this, this study proposed an LCA method specifically applicable to the Korean concrete industry by adapting the ISO standards to suit the Korean situations...
November 2, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27826519/an-efficient-recyclable-magnetic-material-for-the-selective-removal-of-organic-pollutants
#10
Clément Monteil, Nathalie Bar, Agnès Bee, Didier Villemin
Wastewater cleaning strategies based on the adsorption of materials are being increasingly considered, but the wide variety of organic pollutants at low concentrations still makes their removal a challenge. The hybrid material proposed here consists of a zwitterionic polyethylenimine polymer coating a magnetic core. Polyethylenimine is phosphonated at different percentages by a one-step process and used to coat maghemite nanoparticles. It selectively extracts high amounts of cationic and anionic contaminants over a wide range of pH values, depending on the adjustable number of phosphonate groups introduced on the polymer...
2016: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/27818041/a-facile-and-green-strategy-for-preparing-newly-designed-3d-graphene-gold-film-and-its-application-in-highly-efficient-electrochemical-mercury-assay
#11
Lei Shi, Yan Wang, Shiming Ding, Zhenyu Chu, Yu Yin, Danfeng Jiang, Jingyi Luo, Wanqin Jin
In this work, we report a facile and green strategy for in situ and one step preparation of a novel 3D graphene/gold (G/Au) film. Triggering with unique driving force from hydrothermal growth, a 3D interlaced graphene framework with hierarchically porous structures was directly attached on a gold substrate pretreated with a self-assembled monolayer. Simultaneously, highly dispersive Au nanoparticles with tunable morphologies were anchored on the framework utilizing generated graphene as an endogenous reductant...
September 29, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27815031/wide-scale-utilization-of-mswi-fly-ashes-in-cement-production-and-its-impact-on-average-heavy-metal-contents-in-cements-the-case-of-austria
#12
Jakob Lederer, Verena Trinkel, Johann Fellner
A number of studies present the utilization of fly ashes from municipal solid waste incineration (MSWI) in cement production as a recycling alternative to landfilling. While there is a lot of research on the impact of MSWI fly ashes utilization in cement production on the quality of concrete or the leaching of heavy metals, only a few studies have determined the resulting heavy metal content in cements caused by this MSWI fly ashes utilization. Making use of the case of Austria, this study (1) determines the total content of selected heavy metals in cements currently produced in the country, (2) designs a scenario and calculates the resulting heavy metal contents in cements assuming that all MSWI fly ashes from Austrian grate incinerators were used as secondary raw materials for Portland cement clinker production and (3) evaluates the legal recyclability of demolished concretes produced from MSWI fly ash amended cements based on their total heavy metal contents...
November 1, 2016: Waste Management
https://www.readbyqxmd.com/read/27807067/characterization-of-heparan-sulfate-proteoglycan-positive-recycling-endosomes-isolated-from-glioma-cells
#13
Katarzyna A Podyma-Inoue, Takuya Moriwaki, Anupama R Rajapakshe, Kazue Terasawa, Miki Hara-Yokoyama
BACKGROUND: Heparan sulfate proteoglycans (HSPGs)-dependent endocytic events have been involved in glioma progression. Thus, comprehensive understanding of the intracellular trafficking complexes formed in presence of HSPGs would be important for development of glioma treatments. MATERIALS AND METHODS: Subcellular fractionation was used to separate vesicles containing HSPGs from the rat C6 glioma cell line. Isolated HSPG-positive vesicles were further characterized with liquid chromatography-mass spectrometry...
November 2016: Cancer Genomics & Proteomics
https://www.readbyqxmd.com/read/27791343/efficient-ionic-liquid-promoted-chemical-fixation-of-co2-into-%C3%AE-alkylidene-cyclic-carbonates
#14
Jikuan Qiu, Yuling Zhao, Zhiyong Li, Huiyong Wang, Maohong Fan, Jianji Wang
The efficient conversion of CO2 into value-added chemicals under metal-free conditions is of significant importance from the viewpoint of sustainable chemistry. In this work, ionic liquids (ILs) with different properties were used to promote the reaction between CO2 and propargylic alcohol for the synthesis of α-alkylidene cyclic carbonates. The protic IL 1,8-diazabicyclo-[5.4.0]-7-undecenium 2-methylimidazolide ([DBUH][MIm]) was prepared by simple neutralization of the superbase with a weak proton donor and could efficiently promote the reactions in high yields...
October 28, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27790471/developing-a-novel-sustainable-and-beneficial-system-for-the-systematic-management-of-hospital-wastes
#15
Sanket Mohan Doiphode, Indira N Hinduja, Harish S Ahuja
INTRODUCTION: India is the 2(nd) most populated country in the world. Population of India is increasing at a tremendous rate. Proportionately, the numbers of people seeking health care are increasing. In that ratio the quantities of hospital wastes, in wider terms, healthcare wastes that are getting generated is also increasing. Current methods for the safe disposal of healthcare wastes are not able to cope up with the rate of generation of healthcare wastes and moreover are not eco-friendly at all...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27788441/early-testing-of-new-sanitation-technology-for-urban-slums-the-case-of-the-blue-diversion-toilet
#16
Robert Tobias, Mark O'Keefe, Rahel Künzle, Heiko Gebauer, Harald Gründl, Eberhard Morgenroth, Wouter Pronk, Tove A Larsen
The toilets used most in informal urban settlements have detrimental consequences for the environment and human health due to the lack of proper collection and treatment of toilet waste. Concepts for safe, sustainable and affordable sanitation systems exist, but their feasibility and acceptance have to be investigated at an early stage of development, which is difficult due to the high costs of building working models. In this paper, we present an approach to estimate acceptance in a valid and representative form with only one working model, and apply it to test an innovative zero-emission toilet with recycling of wash water...
October 24, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27787752/synthetic-biology-for-co2-fixation
#17
REVIEW
Fuyu Gong, Zhen Cai, Yin Li
Recycling of carbon dioxide (CO2) into fuels and chemicals is a potential approach to reduce CO2 emission and fossil-fuel consumption. Autotrophic microbes can utilize energy from light, hydrogen, or sulfur to assimilate atmospheric CO2 into organic compounds at ambient temperature and pressure. This provides a feasible way for biological production of fuels and chemicals from CO2 under normal conditions. Recently great progress has been made in this research area, and dozens of CO2-derived fuels and chemicals have been reported to be synthesized by autotrophic microbes...
October 26, 2016: Science China. Life Sciences
https://www.readbyqxmd.com/read/27783897/controlled-encapsulation-of-flower-like-rh-ni-alloys-with-mofs-via-tunable-template-dealloying-for-enhanced-selective-hydrogenation-of-alkyne
#18
Luning Chen, Huiqi Li, Wen-Wen Zhan, Zhenming Cao, Jiayu Chen, Qiaorong Jiang, Ya-Qi Jiang, Zhaoxiong Xie, Qin Kuang, Lan-Sun Zheng
For new composite materials with functional nanoparticles (NPs) embedded in metal organic frameworks (MOFs), rational design as well as precise control over their architectures are imperative for achieving enhanced performance and novel functions. Especially in catalysis, the activity and selectivity of such composite materials are strongly determined by the encapsulation state and thickness of the MOF shell, which greatly influences the diffusion and adsorption of substance molecules onto the NP surface. In this study, MOF-74(Ni)-encapsulated Rh-Ni hierarchical heterostructures (Rh-Ni@MOF-74(Ni)) were successfully constructed using magnetic Rh-Ni-alloyed nanoflowers (NFs) as a self-sacrificial template...
October 26, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27783453/thermally-triggered-phase-separation-of-organic-electrolyte-cellulose-solutions
#19
Heitor F N de Oliveira, Matthew T Clough, Roberto Rinaldi
Organic electrolyte solutions (OES)-binary mixtures of an ionic liquid (IL) with a neutral polar aprotic co-solvent-are being recognized as excellent candidate solvents for the dissolution, derivatization, and sustainable processing of cellulose. These solutions exhibit the beneficially combined properties of rapid-to-instantaneous cellulose dissolution, raised thermal stability, and reduced viscosity, compared to cellulose solutions in the parent ILs. Herein, we report the reversible, thermally triggered phase separation of cellulose solutions in 1-ethyl-3-methylimidazolium acetate with 1,3-dimethyl-2-imidazolidinone...
October 26, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27782541/babymeg-a-whole-head-pediatric-magnetoencephalography-system-for-human-brain-development-research
#20
Yoshio Okada, Matti Hämäläinen, Kevin Pratt, Anthony Mascarenas, Paul Miller, Menglai Han, Jose Robles, Anders Cavallini, Bill Power, Kosal Sieng, Limin Sun, Seok Lew, Chiran Doshi, Banu Ahtam, Christoph Dinh, Lorenz Esch, Ellen Grant, Aapo Nummenmaa, Douglas Paulson
We developed a 375-channel, whole-head magnetoencephalography (MEG) system ("BabyMEG") for studying the electrophysiological development of human brain during the first years of life. The helmet accommodates heads up to 95% of 36-month old boys in the USA. The unique two-layer sensor array consists of: (1) 270 magnetometers (10 mm diameter, ∼15 mm coil-to-coil spacing) in the inner layer, (2) thirty-five three-axis magnetometers (20 mm × 20 mm) in the outer layer 4 cm away from the inner layer. Additionally, there are three three-axis reference magnetometers...
September 2016: Review of Scientific Instruments
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