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Hongyan Zhao, Yizhou Wang, Danyu Zhang, Heyong Cheng, Yuanchao Wang
Graphene oxide functionalized silica microspheres (GO@SiO2 ) were synthesized based on condensation reaction between amino from aminosilica particles and carboxyl groups from GO. Reduction of GO@SiO2 with hydrazinium hydroxide generated graphene modified silica particles (G@SiO2 ). GO@SiO2 and G@SiO2 packed capillary columns for capillary electrochromatography were thereafter fabricated by pressure slurry packing with single-particle frits. GO of 0.3 mg mL-1 in dispersion solution for GO@SiO2 synthesis was considered as a compromise between retaining and column efficiency whereas GO@SiO2 of 20 mg mL-1 in slurries for column packing was chosen for a homogenous and tight bed...
December 13, 2017: Electrophoresis
Tingfang Yi
Complex immunoprecipitation (Co-IP) is a powerful technique for precipitating an intact protein complex out of solution and cell lysates using an antibody that specifically binds to a particular protein in a large complex of proteins. Mass spectrometry (MS) is used to identify, sequence, and quantify proteins. RNA-induced silencing complexes (RISCs), Ago2 centered protein assemblies, are essential for miRNA mediated RNA decay and gene expression regulation; however, the complete list of RISCs is unknown. Here we describe methods used to combine IP and MS to identify new components of RISCs...
2018: Methods in Molecular Biology
Shuying Wang, Xiaona Huang, Haoxuan Sun, Chunyang Wu
Inverted planar perovskite solar cells (PSCs), which are regarded as promising devices for new generation of photovoltaic systems, show many advantages, such as low-temperature film formation, low-cost fabrication, and smaller hysteresis compared with those of traditional n-i-p PSCs. As an important carrier transport layer in PSCs, the hole transport layer (HTL) considerably affects the device performance. Therefore, HTL modification becomes one of the most critical issues in improving the performance of PSCs...
December 13, 2017: Nanoscale Research Letters
Andrés Vásquez-Rivera, Kim K Sommer, Harriëtte Oldenhof, Adam Z Higgins, Kelvin G M Brockbank, Andres Hilfiker, Willem F Wolkers
Cryopreservation can be used for long-term preservation of tissues and organs. It relies on using complex mixtures of cryoprotective agents (CPAs) to reduce the damaging effects of freezing, but care should be taken to avoid toxic effects of CPAs themselves. In order to rationally design cryopreservation strategies for tissues, it is important to precisely determine permeation kinetics of the protectants that are used to ensure maximum permeation, while minimizing the exposure time and toxicity effects. This is particularly challenging with protectant solutions consisting of multiple components each with different physical properties and diffusing at a different rate...
December 13, 2017: Analyst
Nicole L Ing, Tyler D Nusca, Allon I Hochbaum
Correction for 'Geobacter sulfurreducens pili support ohmic electronic conduction in aqueous solution' by Nicole L. Ing et al., Phys. Chem. Chem. Phys., 2017, 19, 21791-21799.
December 13, 2017: Physical Chemistry Chemical Physics: PCCP
Jacopo Tosi, Fabrizio Taffoni, Marco Santacatterina, Roberto Sannino, Domenico Formica
Small, compact and embedded sensors are a pervasive technology in everyday life for a wide number of applications (e.g., wearable devices, domotics, e-health systems, etc.). In this context, wireless transmission plays a key role, and among available solutions, Bluetooth Low Energy (BLE) is gaining more and more popularity. BLE merges together good performance, low-energy consumption and widespread diffusion. The aim of this work is to review the main methodologies adopted to investigate BLE performance. The first part of this review is an in-depth description of the protocol, highlighting the main characteristics and implementation details...
December 13, 2017: Sensors
Jae B Park
p38 Mitogen-activated protein kinase (p38 MAPK) is a protein kinase critically involved in the progress of inflammation/stress-associated diseases. Our data suggested that javamide analogues may contain strong anti-inflammation activities, but there is little information about their effects on p38 MAPK. Therefore, in this paper, the effects of thirty javamide analogues on p38 MAPK were investigated using in silico screening and in vitro p38 MAPK assay methods. The javamide analogues were synthesized and their chemical structures were confirmed using nuclear magnetic resonance (NMR) spectroscopic methods...
December 13, 2017: International Journal of Molecular Sciences
Sebastian Stieber, Rainer Dorsch, Christian Haubelt
In the context of modern cyber-physical systems, the accuracy of underlying sensor data plays an increasingly important role in sensor data fusion and feature extraction. The raw events of multiple sensors have to be aligned in time to enable high quality sensor fusion results. However, the growing number of simultaneously connected sensor devices make the energy saving data acquisition and processing more and more difficult. Hence, most of the modern sensors offer a first-in-first-out (FIFO) interface to store multiple data samples and to relax timing constraints, when handling multiple sensor devices...
December 13, 2017: Sensors
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No abstract text is available yet for this article.
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Danielle França de Oliveira, Jefferson Antoniol Mendes Neri, Jonas Alves de Almeida Ribeiro, Fabiana Soares Dos Santos, Mendelssolm Kister de Pietre
In this study β-zeolite, ferrierite and partially delaminated PREFER (precursor of ferrierite) zeolites with several chemical and textural properties were synthesized for the removal of zinc and lead ion metals from their respective solutions. Adsorption experiments involving the suspension of tiny amounts of these solids in aqueous solutions containing either Zn2+ or Pb2+ showed that the removal of these metals at a considerable extent may be attained. Among the studied materials, β-zeolite displayed the better performance in metal ion removal, which may be ascribed to its higher aluminum content, surface area and external surface area, that allows a greater density and availability of ion adsorption active sites...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Shaohua Chen, Yan Sun, Jia Li, Ling Xiong
Amyl xanthate (AX), a widely used reagent in sulfide mineral flotation, has caused serious environmental problems. Manganese dioxides (MnO2), ubiquitous in natural soils and sediments, are one kind of important oxidant or catalyst in facilitating organic pollutant decomposition. In this study, the oxidative degradation of AX by MnO2 was investigated in batch experiments. It was found that up to 90% AX was decomposed by MnO2 in 30 min and the removal efficiency of AX depended strongly on the loading of MnO2 and pH value in the solution where the reactions closely followed a pseudo-first-order model...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Leticia Belén Escudero, Patricia Nora Smichowski, Guilherme Luiz Dotto
In the present work, Iridaea cordata (IC), a red marine macroalgae, was used as an efficient biosorbent for the removal of crystal violet (CV) and methylene blue (MB) dyes from aqueous solutions. The effects of pH (5, 7, and 9) and IC concentration (1, 3, and 5 g L-1) on the biosorption were studied through a 32 full factorial design. Under the optimal conditions (pH: 7, biosorbent concentration: 1 g L-1), biosorption kinetic studies were developed and the obtained experimental data were evaluated by pseudo-first order and pseudo-second order models...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Kartick Lal Bhowmik, Animesh Debnath, Ranendu Kumar Nath, Biswajit Saha
This study reports adsorptive removal of Cr(VI) by magnetic manganese ferrite and manganese oxide nano-particles (MnF-MO-NPs) composite from aqueous media. The X-ray diffraction pattern of MnF-MO-NPs revealed a polycrystalline nature with nanoscale crystallite size. The prepared adsorbent with high Brunauer-Emmett-Teller specific surface area of 100.62 m2/g and saturation magnetization of 30.12 emu/g exhibited maximum Cr(VI) removal at solution pH 2.0 and was easily separated from water under an external magnetic field...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
I K Tsoukalas, C K Makropoulos, S N Michas
Rapid urbanization affecting demand patterns, coupled with potential water shortages due to supply side impacts of climatic changes, has led to the emergence of new technologies for water and wastewater reuse. Sewer mining (SM) is a novel decentralized option that could potentially provide non-potable water for urban uses, including for example the irrigation of urban green spaces, providing a mid-scale solution to effective wastewater reuse. SM is based on extracting wastewater from local sewers and treatment at the point of demand and entails in some cases the return of treatment residuals back to the sewer system...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Tingting Qin, Zhaowei Wang, Xiaoyun Xie, Chaoran Xie, Junmin Zhu, Yan Li
The biochar was prepared by pyrolyzing the roots of cauliflowers, at a temperature of 500 °C under oxygen-limited conditions. The structure and characteristics of the biochar were examined using scanning electron microscopy, an energy dispersive spectrometer, a zeta potential analyzer, and Fourier transform infrared spectroscopy. The effects of the temperature, the initial pH, antibiotic concentration, and contact time on the adsorption of norfloxacin (NOR) and chlortetracycline (CTC) onto the biochar were investigated...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Nurdan Büyükkamacı, Gökçe Karaca
A life cycle assessment (LCA) approach was used in the assessment of environmental impacts of some polishing units for reuse of wastewater treatment plant effluents in agricultural irrigation. These alternative polishing units were assessed: (1) microfiltration and ultraviolet (UV) disinfection, (2) cartridge filter and ultrafiltration (UF), and (3) just UV disinfection. Two different energy sources, electric grid mix and natural gas, were considered to assess the environmental impacts of them. Afterwards, the effluent of each case was evaluated against the criteria required for irrigation of sensitive crops corresponding to Turkey regulations...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
T Olmez-Hanci, I Arslan-Alaton, M Doğan, S Khoei, H Fakhri, G Korkmaz
Advanced oxidation of the aqueous Triton™ X-45 (TX-45), iopamidol (IOPA), ciprofloxacin (CIP) and bisphenol A (BPA) solutions via activation of persulfate (PS) with zero-valent aluminum (ZVA) was investigated. The study aimed at assessing the effectiveness of the PS/ZVA process in terms of target micropollutants (MPs) and toxicity abatements in raw surface water (RSW) and distilled water (DW). TX-45, CIP and BPA were completely degraded after 90-minute, 120-minute and 40-minute treatment, respectively, with PS/ZVA in DW, whereas 95% IOPA removal was achieved after 120-minute (MPs = 2 mg/L; ZVA = 1 g/L; PS = 0...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Sevgi Ertuğrul Karatay, Gönül Dönmez, Zümriye Aksu
The use of microbial biomass as biosorbent for phenol removal has been extensively studied, but its removal by biosorption by thermophilic cyanobacterium Phormidium sp. has not been investigated to the best of our knowledge. In the present study, some important parameters for biosorption process were optimized, starting with testing the effects of different pH values ranging from 1 to 12, and then initial phenol concentrations of 45.1, 115.3, 181.4, 243.3, 339.9 mg/L on phenol uptake. The efficiency of removal from aqueous solution was higher within the pH 6-8 range, with the maximum of 100% at pH 7 after 24 hours of adsorption time...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Matthew Scarpelli, Jens Eickhoff, Enrique Cuna, Scott Perlman, Robert Jeraj
The statistical analysis of positron emission tomography (PET) standardized uptake value (SUV) measurements is challenging due to the skewed nature of SUV distributions. This limits utilization of powerful parametric statistical models for analyzing SUV measurements. An ad-hoc approach, which is frequently used in practice, is to blindly use a log transformation, which may or may not result in normal SUV distributions. This study sought to identify optimal transformations leading to normally distributed PET SUVs extracted from tumors and assess the effects of therapy on the optimal transformations...
December 13, 2017: Physics in Medicine and Biology
Junjun Liu, Rongjie Zhang, Rui Feng, Jiaxuan Feng, Zhiqing Zhao, Zhenjiang Li, Yuxi Zhao, Yiming Li, Jian Zhou, Zaiping Jing
Background Unplanned stents in thoracic endovascular aortic repair mean additional stents implantation beyond the preoperative planning to achieve operation success. This study aimed to reveal the prevalence and consequences of unplanned stents in thoracic endovascular aortic repair for type B aortic dissection and explore the reasons, risk factors and solutions for unplanned stents. Methods Retrospectively analysis consecutive patients diagnosed as type B aortic dissection with initial tear originating distal from the left subclavian artery and underwent thoracic endovascular aortic repair from September 1998 to June 2014 in our center...
January 1, 2017: Vascular
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