200,022 results match your criteria Interface focus[Journal]


In situ soft x-ray absorption spectroscopic study of polycrystalline Fe/MgO interfaces.

J Phys Condens Matter 2018 Dec 17. Epub 2018 Dec 17.

Center for Spintronic Materials, Amity University, Sector 125, Noida, INDIA.

Interfacial interactions between a layer of iron and MgO hold the key to various phenomena like, tunnel magnetoresistance, perpendicular magnetic anisotropy, interlayer exchange coupling, observed in the system. Interface structure has been studied<i> in situ </i>during deposition of iron on MgO surface, using soft x-ray absorption spectroscopy (SXAS). Sub-monolayer sensitivity of SXAS, combined with <i>in situ</i> measurements as a function of iron layer thickness, allowed one to study the evolution of interface with film thickness. Read More

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December 2018

Sandwich-type electrochemical immunosensor for sensitive detection of CEA based on the enhanced effects of Ag NPs@CS spaced Hemin/rGO.

Biosens Bioelectron 2018 Dec 7;126:785-791. Epub 2018 Dec 7.

School of Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China.

An ultrasensitive sandwich-type electrochemical immunosensor was designed by using gold nanoparticles (Au NPs) as the substrate material and microporous carbon spheres (CS) loading silver nanoparticles (Ag NPs) spaced Hemin/reduced graphene oxide (Hemin/rGO) porous composite materials (Ag NPs@CS-Hemin/rGO) as the detection antibodies (Ab) label for detecting carcinoembryonic antigen (CEA). The Au NPs with good electrical conductivity and biocompatibility could accelerate the electron transfer on the electrode interface and enhance the load capacity of capture antibodies (Ab). Hemin is peroxidase-like substance which has excellent catalytic ability for HO reduction but easy to molecular aggregation and oxidative self-destruction. Read More

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December 2018

Non-invasive MRI of brain clearance pathways using multiple echo time arterial spin labelling: An Aquaporin-4 study.

Neuroimage 2018 Dec 14. Epub 2018 Dec 14.

UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, London, UK.

There is currently a lack of non-invasive tools to assess water transport in healthy and pathological brain tissue. Aquaporin-4 (AQP4) water channels are central to many water transport mechanisms, and emerging evidence also suggests that AQP4 plays a key role in amyloid-β (Aβ) clearance, possibly via the glymphatic system. Here, we present the first non-invasive technique sensitive to AQP4 channels polarised at the blood-brain interface (BBI). Read More

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December 2018

Phycoerythrin-phycocyanin aggregates and phycoerythrin aggregates from phycobilisomes of the marine red alga Polysiphonia urceolata.

Int J Biol Macromol 2018 Dec 14. Epub 2018 Dec 14.

College of Life Sciences, Yantai University, Shandong 264005, PR China.

Phycoerythrin-phycocyanin aggregates and phycoerythrin aggregates showing special spectral characteristics were prepared from the partly dissociated products of phycobilisomes from Polysiphonia urceolata. The absorption difference spectra between the aggregates and phycoerythrins showing normal spectral characteristics show peaks at 583 nm. The fluorescence emission difference spectra between the phycoerythrin aggregates and normal phycoerythrins show peaks at 602 nm. Read More

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December 2018

Vitrectomy for diabetic macular edema: optical coherence tomography criteria and pathology of the vitreomacular interface.

Am J Ophthalmol 2018 Dec 14. Epub 2018 Dec 14.

Department of Ophthalmology, Ludwig-Maximilians-University, Munich, Germany.

Purpose: To correlate spectral-domain optical coherence tomography (SD-OCT) criteria and clinical data with pathology of the vitreomacular interface (VMI) in eyes with diabetic macular edema (DME).

Design: Retrospective cross-sectional study and laboratory investigation.

Methods: We included specimens of 27 eyes of 26 patients with center-involved DME that underwent vitrectomy with peeling of the internal limiting membrane (ILM). Read More

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December 2018

Dynamic Phase Diagram of Catalytic Surface of Hexagonal Boron Nitride in Conditions of Oxidative Dehydrogenation of Propane.

J Phys Chem Lett 2018 Dec 17. Epub 2018 Dec 17.

Partially oxidized surfaces of hexagonal boron nitride (hBN) and several metal borides are unexpectedly excellent catalysts for oxidative dehydrogenation of alkanes to olefins, but the nature of the active site(s) on these B-containing interfaces remains elusive. We characterize the surface of the partially oxidized B-rich hBN surface under reaction conditions from first principles. The interface has thermal access to multiple different stoichiometries, and multiple structures of each stoichiometry. Read More

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December 2018

Nature of Hydrogen Adsorption on Platinum in the Aqueous Phase.

Angew Chem Int Ed Engl 2018 Dec 17. Epub 2018 Dec 17.

Technische Universität München, Department Chemie, Lichtenbergstrasse 4, 85748, Garching, GERMANY.

The thermodynamic state of H₂ adsorbed on Pt in the aqueous phase was determined by kinetic analysis of H₂ reacting with D₂O to HDO, HD and D₂ and by DFT based ab inito molecular dynamic simulation of H2 adsorption on Pt (111), Pt (110), and Pt nanoparticles. Dissociative adsorption of H₂ on Pt is significantly weakened in the aqueous phase compared to adsorption at gas-solid interface. Water destabilizes adsorbed H, decreasing the heat of adsorption by 19 - 22 kJ/mol(H₂), while inducing an additional entropy loss of 50 - 70 J/(mol(H₂)·K). Read More

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December 2018

Structure-guided design combined with evolutionary diversity led to the discovery of the xylose-releasing exo-xylanase activity in the glycoside hydrolase family 43.

Biotechnol Bioeng 2018 Dec 17. Epub 2018 Dec 17.

Brazilian Bioethanol Science and Technology Laboratory, National Center for Research in Energy and Materials, Giuseppe Maximo Scolfaro 10000, Campinas, São Paulo, Brazil.

Rational design is an important tool for sculpting functional and stability properties of proteins and its potential can be much magnified when combined with in vitro and natural evolutionary diversity. Herein, we report the structure-guided design of a xylose-releasing exo-β-1,4-xylanase from an inactive member of glycoside hydrolase family 43 (GH43). Structural analysis revealed a non-conserved substitution (Lys ) that results in the disruption of the hydrogen bond network that supports catalysis. Read More

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December 2018

Theoretical insights into photo-induced electron transfer at BiOX (X = F, Cl, Br, I) (001) surfaces and interfaces.

Phys Chem Chem Phys 2018 Dec 17. Epub 2018 Dec 17.

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, China.

The electron transfer process (ETP) of a photocatalyst plays a crucial role in clarifying its photoelectrochemical catalytic mechanism. BiOX (X = F, Cl, Br, I) (001) surfaces display excellent photocatalytic performance due to the high separation efficiency of photogenerated electron-hole (e--h+) pairs in their own efficient internal electric field (IEF). The oxygen vacancies (OVs) on the surfaces could cause a change in localized electronic states, then improve the photocatalytic activity of BiOX. Read More

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December 2018

High-Efficiency Nose-to-Lung Aerosol Delivery in an Infant: Development of a Validated Computational Fluid Dynamics Method.

J Aerosol Med Pulm Drug Deliv 2018 Dec 15. Epub 2018 Dec 15.

1 Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University , Richmond, Virginia.

Background: Computational fluid dynamics (CFD) provides a powerful tool for developing new high-efficiency aerosol delivery strategies, such as nose-to-lung (N2L) aerosol administration to infants and children using correctly sized aerosols. The objective of this study was to establish numerically efficient CFD solution methods and guidelines for simulating N2L aerosol administration to an infant based on comparisons with concurrent in vitro experiments.

Materials And Methods: N2L administration of a micrometer-sized aerosol (mass median aerodynamic diameter [MMAD] = 1. Read More

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December 2018

Surface and interface design for heterogeneous catalysis.

Phys Chem Chem Phys 2018 Dec 17. Epub 2018 Dec 17.

Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Materials for Energy Conversion of Chinese Academy of Sciences, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China.

Surface and interface designs are an efficient strategy to fabricate innovative and advanced catalysts. A prerequisite for this is a fundamental understanding of the structure-performance relations of catalyst nanoparticles, which, however, remains a formidable challenge due to the complexity of heterogeneous catalysis. Recent progresses in catalytic nanocrystals with uniform and well-defined structures, in situ characterization techniques, and theoretical calculations have offered opportunities for the fundamental studies of heterogeneous catalysis, and the achieved outputs are turning the innovation of efficient catalysts via surface and interface designs into a reality. Read More

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December 2018

Highly efficient hydrogen evolution of platinum via tuning the interfacial dissolved-gas concentration.

Chem Commun (Camb) 2018 Dec 17. Epub 2018 Dec 17.

Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.

A facile perfluorooctanesulfonate (PFOS)-modulation strategy was developed to precisely control the dissolved-gas concentration at the electrode/gas/electrolyte interface for enhanced HER. With PFOS modulation, lowered dissolved-hydrogen concentrations at the catalytic interface and sufficient exposure of the surface active area can be achieved. Accordingly, relative to pure Pt, PFOS-modulated Pt possesses a remarkable HER performance. Read More

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December 2018

A bone preservation protocol that enables evaluation of osseointegration of implants with micro- and nanotextured surfaces.

Biotech Histochem 2018 Dec 17:1-10. Epub 2018 Dec 17.

b Materials and Nanoscience Laboratory , Physics University, Pontifical Catholic University of Rio Grande do Sul , Porto Alegre , Brazil.

Development of surface treatments has enabled secure attachment of dental implants in less than 1 month. Consequently, it is necessary to characterize accurately the osseointegration of the implant surface in the region of the bone-implant contact (BIC). We developed a method for sample preparation that preserves both bone and BIC to permit analysis of the contact interface. Read More

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December 2018

Bioacessibility of lipophilic compounds vehiculated in emulsions: choice of lipids and emulsifiers.

J Agric Food Chem 2018 Dec 17. Epub 2018 Dec 17.

Great efforts have been made to design emulsions considering the need to perform an effective encapsulation, protection, vehiculation and bioaccessibility of lipophilic compounds. This task can be achieved by manipulating the structure of the emulsion based on the choice of the processes and ingredients of the aqueous phase, interface and lipid matrix. Thus, the main focus of this manuscript is to provide insights into the use of ingredients engineering in manipulating/building emulsion structures that enhance lipophilic compounds release and bioaccessibility. Read More

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December 2018

A High Current Density Direct-Current Generator Based on a Moving van der Waals Schottky Diode.

Adv Mater 2018 Dec 17:e1804398. Epub 2018 Dec 17.

College of microelectronics, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.

Traditionally, Schottky diodes are used statically in the electronic information industry while dynamic or moving Schottky diode-based applications are rarely explored. Herein, a novel Schottky diode named "moving Schottky diode generator" is designed, which can convert mechanical energy into electrical energy by means of lateral movement between the graphene/metal film and semiconductor. The mechanism is based on the built-in electric field separation of the diffusing carriers in moving Schottky diode. Read More

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December 2018

Pollen tube integrity regulation in flowering plants: insights from molecular assemblies on the pollen tube surface.

New Phytol 2018 Dec 16. Epub 2018 Dec 16.

State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at College of Life Sciences, Peking University, Beijing, 100871, People's Republic of China.

Unlike in animals, sperm in flowering plants are immotile and they are embraced as passive cargoes by a pollen tube which embarks on a long journey in the pistil to deliver them to the female gametophyte for fertilization. How the pollen tube switches from a rapid polarized growth towards its target to an abrupt disintegration for sperm cell release inside the female gametophyte has been puzzling. Recent studies showed that members of the Catharanthus roseus RLK1-like (CrRLK1L) receptor kinase family and their ligands, 5-kDa cysteine-rich peptides rapid alkalinization factors (RALFs), engage in an intricate balancing act involving autocrine and paracrine signaling to maintain pollen tube growth and induce timely tube rupture at the spatially confined pollen tube-female gametophyte interface. Read More

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December 2018

Binding of Telomestatin, TMPyP4, BSU6037, and BRACO19 to a Telomeric G-Quadruplex-Duplex Hybrid Probed by All-Atom Molecular Dynamics Simulations with Explicit Solvent.

ACS Omega 2018 Nov 5;3(11):14788-14806. Epub 2018 Nov 5.

Chemistry & Biochemistry and Department of Molecular & Cellular Biosciences, College of Science and Mathematics, Rowan University, Glassboro, New Jersey 08028, United States.

A promising anticancer therapeutic strategy is the stabilization of telomeric G-quadruplexes using G-quadruplex-binding small molecules. Although many G-quadruplex-specific ligands have been developed, their low potency and selectivity to G-quadruplexes over duplex remains unsolved. Recently, a crystal structure of a telomeric 3' quadruplex-duplex hybrid was reported and the quadruplex-duplex interface was suggested to a good target to address the issues. Read More

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November 2018

Oxygen Reduction Activity and Stability of Composite Pd/Co-Nanofilms/C Electrocatalysts in Acid and Alkaline Media.

Front Chem 2018 29;6:596. Epub 2018 Nov 29.

Department of Energy and Chemical Engineering, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, China.

The morphology tuning of Pd and Pd-M nanoparticles is one of the significant strategies to control the catalytic activity toward oxygen reduction reaction (ORR). In this study, composite Pdx/Co-nanofilms/C electrocatalysts of Pd nanoparticles implanted onto Co nanofilms were synthesized on an immiscible ionic liquid (IL)/water interface for ORR. The Pd nanoparticles implanted onto Co nanofilms show a marked distortion of crystal lattice and surface roughness. Read More

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November 2018

Genetic Inactivation of Inclusion Membrane Protein CT228 Alters MYPT1 Recruitment, Extrusion Production, and Longevity of Infection.

Front Cell Infect Microbiol 2018 30;8:415. Epub 2018 Nov 30.

Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, OK, United States.

is an obligate intracellular pathogen with global health and economic impact. Upon infection, resides within a protective niche, the inclusion, wherein it replicates and usurps host cell machinery and resources. The inclusion membrane is the key host-pathogen interface that governs specific protein-protein interactions to manipulate host signaling pathways. Read More

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November 2018

Reversible Restructuring of Silver Particles during Ethylene Epoxidation.

ACS Catal 2018 Dec 8;8(12):11794-11800. Epub 2018 Nov 8.

Laboratory of Inorganic Materials Chemistry, Schuit Institute of Catalysis, Eindhoven University of Technology P.O. Box 513, 5600 MB Eindhoven, The Netherlands.

The restructuring of a silver catalyst during ethylene epoxidation under industrially relevant conditions was investigated without and with vinyl chloride (VC) promotion. During non-VC-promoted ethylene epoxidation, the silver particles grow and voids are formed at the surface and in the bulk. Electron tomography highlighted the presence of voids below the Ag surface. Read More

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December 2018

Contemporary Knowledge Workers and the Boundaryless Work-Life Interface: Implications for the Human Resource Management of the Knowledge Workforce.

Front Psychol 2018 30;9:2414. Epub 2018 Nov 30.

School of Management, College of Business, RMIT University, Melbourne, VIC, Australia.

In the last decade, knowledge workers have seen tremendous change in ways of working and living, driven by proliferating mobile communication technologies, the rise of dual-income couples, shifting expectations of ideal motherhood and involved fatherhood, and the rise of flexible working arrangements. Drawing on 54 interviews with Australian knowledge workers in the information technology sector, we argue that the interface between work and life is now blurred and boundaryless for knowledge workers. By this, we mean that knowledge workers are empowered and enslaved by mobile devices that bring work into the home, and family into the workplace. Read More

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November 2018

System Transparency in Shared Autonomy: A Mini Review.

Front Neurorobot 2018 30;12:83. Epub 2018 Nov 30.

ETSI Industriales, Universidad Politécnica de Madrid, Madrid, Spain.

What does transparency mean in a shared autonomy framework? Different ways of understanding system transparency in human-robot interaction can be found in the state of the art. In one of the most common interpretations of the term, transparency is the observability and predictability of the system behavior, the understanding of what the system is doing, why, and what it will do next. Since the main methods to improve this kind of transparency are based on interface design and training, transparency is usually considered a property of such interfaces, while natural language explanations are a popular way to achieve transparent interfaces. Read More

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November 2018

Enhanced Plasticity of Human Evoked Potentials by Visual Noise During the Intervention of Steady-State Stimulation Based Brain-Computer Interface.

Front Neurorobot 2018 29;12:82. Epub 2018 Nov 29.

School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, China.

Neuroplasticity, also known as brain plasticity, is an inclusive term that covers the permanent changes in the brain during the course of an individual's life, and neuroplasticity can be broadly defined as the changes in function or structure of the brain in response to the external and/or internal influences. Long-term potentiation (LTP), a well-characterized form of functional synaptic plasticity, could be influenced by rapid-frequency stimulation (or "tetanus") within human sensory pathways. Also, stochastic resonance (SR) has brought new insight into the field of visual processing for the study of neuroplasticity. Read More

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November 2018

Early Detection of Hemodynamic Responses Using EEG: A Hybrid EEG-fNIRS Study.

Front Hum Neurosci 2018 29;12:479. Epub 2018 Nov 29.

School of Mechanical Engineering, Pusan National University, Busan, South Korea.

Enhanced classification accuracy and a sufficient number of commands are highly demanding in brain computer interfaces (BCIs). For a successful BCI, early detection of brain commands in time is essential. In this paper, we propose a novel classifier using a modified vector phase diagram and the power of electroencephalography (EEG) signal for early prediction of hemodynamic responses. Read More

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November 2018

Correction function for accuracy improvement of the Composite Smeared Finite Element for diffusive transport in biological tissue systems.

Comput Methods Appl Mech Eng 2018 Aug 22;338:97-116. Epub 2018 Apr 22.

Bioengineering Research and Development Center BioIRC Kragujevac, Prvoslava Stojanovica 6, 34000 Kragujevac, Serbia.

Modeling of drug transport within capillaries and tissue remains a challenge, especially in tumors and cancers where the capillary network exhibits extremely irregular geometry. Recently introduced Composite Smeared Finite Element (CSFE) provides a new methodology of modeling complex convective and diffusive transport in the capillary-tissue system. The basic idea in the formulation of CSFE is in dividing the FE into capillary and tissue domain, coupled by 1D connectivity elements at each node. Read More

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Development and testing of acoustically-matched hydrogel-based electrodes for simultaneous EMG-ultrasound detection.

Med Eng Phys 2018 Dec 13. Epub 2018 Dec 13.

Laboratory for Engineering of the Neuromuscular System (LISiN), Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.

In this manuscript we describe the development and testing of a bipolar electrode for the simultaneous acquisition of ultrasound (US) images and surface electromyograms (EMGs) from the same muscle region. The developed electrode (bEMG-US) consists of two circular sensing regions (20 mm diameter) with fixed inter-electrode distance (3.5 cm, center-to-center). Read More

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December 2018

The role of polymerization in adhesive dentistry.

Dent Mater 2018 Dec 13. Epub 2018 Dec 13.

Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna and IGM-CNR, Unit of Bologna, Italy.

Adhesive systems are resin-based materials that reach their final mechanical properties through a polymerization process. Previous literature correlated the failure of the adhesive interface to low polymer setting. Adhesives systems are elaborate mixtures of different molecules of both hydrophilic and hydrophobic nature, included in the formulation to adequately infiltrate the complex dental substrate or added to prolong the stability of the adhesive layer over time. Read More

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December 2018

Experimental analysis of surface detection methods for two-medium imaging with a linear ultrasonic array.

Ultrasonics 2018 Dec 7. Epub 2018 Dec 7.

Mechatronics Engineering Department, School of Engineering at the University of Sao Paulo, Sao Paulo, Brazil.

In ultrasonic nondestructive testing, when using an ultrasonic linear array transducer for imaging objects with nonplanar surfaces, a coupling medium must be used. To compensate for the refraction at the coupler-object interface, its shape must be known. Two methods for surface detection of convex objects in immersion are proposed, using the same linear array transducer for surface detection and for SAFT imaging. Read More

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December 2018

Cementless revision femoral stems application of press-fit principles and clinical outcomes.

Int Orthop 2018 Dec 15. Epub 2018 Dec 15.

, Rennes, France.

Background: Cementless femoral stems are currently used in revision total hip arthroplasty (THA) with the surgeon choosing between various fixation modes. The outcomes are good in the medium term; however, some failures have been attributed to technical errors during implantation. When the decision has been made to use a press-fit implant, the impact of the surgeon's technique on the functional outcomes have not been explored in-depth. Read More

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December 2018

Exchanges of nitrogen and phosphorus across the sediment-water interface influenced by the external suspended particulate matter and the residual matter after dredging.

Environ Pollut 2018 Dec 5;246:207-216. Epub 2018 Dec 5.

State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, PR China; Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, PR China.

Dredging is frequently implemented for the reduction of internal nitrogen (N) and phosphorus (P) loadings and the control of eutrophication. Residuals during dredging activities and external pollution loadings after dredging both commonly contribute to influence the effectiveness of dredging and have been widely discussed. In the current study, the exchanges of N and P across the sediment-water interface (SWI) to these two factors were compared in a six-month field incubation experiment. Read More

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December 2018

Intercellular adhesion molecule 1 antibody-mediated mesoporous drug delivery system for targeted treatment of triple-negative breast cancer.

J Colloid Interface Sci 2018 Dec 10;538:630-637. Epub 2018 Dec 10.

Department of Medical Imaging, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, 210002 Jiangsu, PR China; State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093 Jiangsu, PR China; Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing 210046 Jiangsu, PR China. Electronic address:

The development of effective targeted therapies for triple negative breast cancer (TNBC) remains a challenge. This targeted drug delivery system used a near-infrared fluorescence dye cyanine 5.5 (Cy5. Read More

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December 2018
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A general strategy to fabricate soft magnetic CuFeO@SiO nanofibrous membranes as efficient and recyclable Fenton-like catalysts.

J Colloid Interface Sci 2018 Dec 8;538:620-629. Epub 2018 Dec 8.

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China; Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China. Electronic address:

Fenton or Fenton-like technique, as one of the advanced oxidation processes, plays a significant role in the removal of non-easily degradable organic pollutants; however, most of such catalysts are fragile with poor structural integrity under large deformation, thereby restricting their wide applications. Herein, soft copper ferrite nanostructures functionalized silica nanofibrous membranes (CuFeO@SNM) were fabricated through a novel strategy with the combination of in-situ dopamine polymerization, ion adsorption, and cohesive precipitation method. Benefiting from the high metallic ion adsorption capacity of polydopamine together with the rapid co-precipitation of adsorbed ions on fiber surface in alkaline solution, the membranes possessed homogenously distributed nanostructured CuFeO, large specific surface area, and high pore volume, which are a benefit for the improvement of Fenton-like catalytic activity towards organic pollutants decomposition. Read More

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December 2018

Utility of sheathless capillary electrophoresis-mass spectrometry for metabolic profiling of limited sample amounts.

J Chromatogr B Analyt Technol Biomed Life Sci 2018 Dec 6;1105:10-14. Epub 2018 Dec 6.

Biomedical Microscale Analytics, Division of Systems Biomedicine and Pharmacology, Leiden Academic Center for Drug Research, Leiden University, the Netherlands. Electronic address:

Metabolomics studies using a small amount of cells may save time and money, while in some cases (e.g., profiling pathogenic cells in an early-stage tissue), only a small number of cells are accessible for analysis. Read More

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December 2018

Structure and stability of nanofluid films wetting solids: An overview.

Adv Colloid Interface Sci 2018 Dec 7;264:1-10. Epub 2018 Dec 7.

Department of Chemical Engineering, Illinois Institute of Technology, Chicago, IL, 60616, United States.

When an air bubble or an oil droplet in a nanofluid (liquid containing dispersed nanoparticles) approaches a solid surface, a nanofluid film is formed between the bubble or drop and a solid substrate. The nanoparticles confined in the film surfaces tend to self-layer and the film thins in a stepwise manner. The wetting behavior and film stability criteria valid for the classical molecularly thin films cannot be applied to nanofilm. Read More

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December 2018

Ligand binding domain interface: A tipping point for pharmacological agents binding with GluN1/2A subunit containing NMDA receptors.

Eur J Pharmacol 2018 Dec 13. Epub 2018 Dec 13.

Edward Via Virginia College of Osteopathic Medicine, Technical University, Darmstadt, Germany; Virginia-Maryland College of Veterinary MedicineVirginia Tech, Blacksburg, VA, USA; School of Neuroscience, Virginia Tech, Blacksburg, VA, USA. Electronic address:

N-methyl D-aspartate (NMDA) receptors play a crucial role in normal brain function, pathogenesis of neurodegenerative and psychiatric disorders. Functional tetra-heteromeric NMDA receptor contains two obligatory GluN1 subunits and two identical or different non-GluN1 subunits that evolve from six different genes including four GluN2 (A-D) and two GluN3 (A-B) subunits. Since NMDA receptors confer varied physiological properties and spatiotemporal distributions in the brain, pharmacological agents that target NMDA receptors with specific GluN2 subunits have significant potential for therapeutic applications. Read More

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December 2018

Liquid secretion and setal compliance: the beetle's winning combination for a robust and reversible adhesion.

Curr Opin Insect Sci 2018 Dec 24;30:19-25. Epub 2018 Aug 24.

Functional Morphology and Biomechanics, Kiel University, D-24118 Kiel, Germany.

This paper is a brief review and discussion of the recent literature on the hairy adhesive pads of beetles, with the focus on two features of these pads, firstly, compliant setal tips and secondly, a liquid secretion, that together guarantee robust cycles of attachment/detachment on smooth and rough substrates. The compliance is required to ensure sufficient contact between the setal tips and the substrate with a minimum of elastically stored energy at the contact interface. The secretion fills potential gaps between both surfaces, generates capillary adhesive forces, and enhances self-cleaning of these microstructures. Read More

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December 2018

Multiscale simulations of critical interfacial failure in carbon nanotube-polymer composites.

J Chem Phys 2018 Dec;149(22):224102

Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom.

Computational investigation of interfacial failure in composite materials is challenging because it is inherently multi-scale: the bond-breaking processes that occur at the covalently bonded interface and initiate failure involve quantum mechanical phenomena, yet the mechanisms by which external stresses are transferred through the matrix occur on length and time scales far in excess of anything that can be simulated quantum mechanically. In this work, we demonstrate and validate an adaptive quantum mechanics (QM)/molecular mechanics simulation method that can be used to address these issues and apply it to study critical failure at a covalently bonded carbon nanotube (CNT)-polymer interface. In this hybrid approach, the majority of the system is simulated with a classical forcefield, while areas of particular interest are identified on-the-fly and atomic forces in those regions are updated based on QM calculations. Read More

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December 2018

Functionalized rifampicin-loaded nanostructured lipid carriers enhance macrophages uptake and antimycobacterial activity.

Colloids Surf B Biointerfaces 2018 Dec 4;175:306-313. Epub 2018 Dec 4.

Laboratório de Fitotecnologia, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Brazil. Electronic address:

Tuberculosis is an infectious bacterial disease that causes millions of deaths worldwide. Current treatment recommended by WHO is effective, however it is an extensive and arduous process associated to severe adverse effects, which induces a low patient compliance and the emerging of multidrug resistant tuberculosis. Thus, as a main goal of this study, rifampicin nanoparticles were surface functionalized with a tuftsin-modifed peptide to selectively recognize receptors located on infected alveolar macrophages, enhancing nanoparticles uptake by these cells and improving antimycobacterial activity. Read More

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December 2018
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Two-dimensional porphyrin-based covalent organic framework: A novel platform for sensitive epidermal growth factor receptor and living cancer cell detection.

Biosens Bioelectron 2018 Dec 7;126:734-742. Epub 2018 Dec 7.

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450000, PR China. Electronic address:

A porphyrin-based covalent organic framework (denoted as p-COF) was synthesized by a simple oil-bath method and exploited as a novel sensing layer for immobilizing epidermal growth factor receptor (EGFR)-targeting aptamer strands to detect trace EGFR and living michigan cancer foundation-7 (MCF-7) cells for the first time. p-COF presented a nanosheet-like structure, large cavities, rich nitrogen-bearing groups, high electrochemical activity, excellent bioaffinity, low toxicity, and good stability in aqueous solution; the microstructural features of this material enabled strong immobilization of the aptamer strands. Interactions between the aptamer strands and EGFR significantly changed the electrochemical signals of the modified electrode due to the formation of an aptamer-EGFR complex. Read More

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December 2018
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A bifunctional conjugated polyelectrolyte for the interfacial engineering of polymer solar cells.

J Colloid Interface Sci 2018 Dec 7;538:611-619. Epub 2018 Dec 7.

Istituto per lo Studio delle Macromolecole (ISMac - CNR), Via Bassini 15, 20133 Milano, Italy. Electronic address:

In this work a novel combination of side chain functionalities, alkyl-phosphonate (EP) and alkyl-ammonium bromide (NBr) groups, on a polyfluorene backbone (PF-NBr-EP) was studied as cathode interfacial material (CIM) in polymer-based solar cells. The devices were made with a conventional geometry, with PTB7:PC BM as active layer and aluminum as metal electrode. The CIM showed good solubility in ethanol and film forming ability onto the active layer so that its deposition could be finely tuned. Read More

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December 2018

Nanoparticle-nanobubble interactions: Charge inversion and re-entrant condensation of amidine latex nanoparticles driven by bulk nanobubbles.

J Colloid Interface Sci 2018 Dec 5;538:605-610. Epub 2018 Dec 5.

MESA+ Institute for Nanotechnology & Faculty of Science and Technology, University of Twente, PO Box 217, 7500 AE Enschede, the Netherlands. Electronic address:

Hypothesis: The stability of colloidal suspensions can be influenced by supersaturation of the supporting electrolyte with gas. It has been proposed that this effect can be attributed to the formation of nanobubbles on the surface of the colloidal particles, in turn influencing DLVO forces. While previous interpretations have focused primarily on van der Waals interactions, probing positively charged particles can provide complementary insight into electrostatic interactions. Read More

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December 2018

An acid-pasting approach towards perylenetetracarboxylic diimide based lithium/sodium ion battery cathodes with high rate performances.

J Colloid Interface Sci 2018 Nov 23;538:597-604. Epub 2018 Nov 23.

National Engineering Lab for TFT-LCD Materials and Technologies, Department of Electronic Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China. Electronic address:

An acid-pasting approach is developed in this work to fabricate the composite of perylenetetracarboxylic diimide (PTCDI) and carbon black in concentrated sulfuric acid. Different from traditional mechanical mixing, the solution-based fabrication strategy enables the sufficient blending of PTCDI as active component and carbon black as conductive agent in the PTCDI/CB composite. Serving as the cathode material, the PTCDI/CB composite shows excellent electrochemical performances in both lithium ion battery (137 mAh g at 100 mA g and 110 mAh g at 2000 mA g) and sodium ion battery (134 mAh g at 100 mA g and 99 mAh g at 1000 mA g), which are comparable to the state-of-art organic/inorganic cathode materials. Read More

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November 2018

Binding of norharmane with RNA reveals two thermodynamically different binding modes with opposing heat capacity changes.

J Colloid Interface Sci 2018 Dec 4;538:587-596. Epub 2018 Dec 4.

Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 426066, Madhya Pradesh, India. Electronic address:

The binding interaction of a prospective anti-cancer photosensitizer, norharmane (NHM, 9H-pyrido[3,4-b]indole) with double stranded RNA reveals a primarily intercalative mode of binding. Steady-state and time-resolved fluorescence spectroscopic results demonstrate the occurrence of drug-RNA binding interaction as manifested through environment-sensitive prototropic equilibrium of NHM. However, the key finding of the present study lies in unraveling the complexities in the NHM-RNA binding thermodynamics. Read More

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December 2018

Energy and cost-efficient nano-Ru-based perovskites/RGO composites for application in high performance supercapacitors.

J Colloid Interface Sci 2018 Dec 5;538:578-586. Epub 2018 Dec 5.

Institute of Electrochemistry, Ulm University, 89081 Ulm, Germany; Helmholtz-Institute-Ulm (HIU) [d], Helmholtzstr. 11, 89081 Ulm, Germany; Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany. Electronic address:

Nano-Ru-based perovskites RGO are prepared simultaneously in presence of various A-metal salts (A = Sr, Ba or Ca salts) using two different methods for reaction initiation. No further calcination step is needed for the formation of well-defined perovskite structure. Graphene oxide (GO) is used as a fuel to prepare various Ru-based perovskites for the first time. Read More

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December 2018
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Noble metal nanoparticle-functionalized Zr-metal organic frameworks with excellent photocatalytic performance.

J Colloid Interface Sci 2018 Dec 6;538:569-577. Epub 2018 Dec 6.

College of Chemical Engineering, Jiangsu Key Lab for the Chemistry & Utilization of Agricultural and Forest Biomass, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, Jiangsu 210037, China. Electronic address:

Noble metal nanoparticles (NPs) functionalized MOFs are attractive materials for photocatalytic reactions, and outstanding catalytic performances can be expected, especially when they have intrinsically matched crystal faces between metals and MOFs. This study discovered that the photocatalytic oxidation of aromatic alcohols to aldehydes was enhanced over Au/UiO-66-NH or Au/UiO-66 but suppressed over Pt loaded counterparts, whereas the reduction of Cr(VI) was boosted over both two catalysts. In reactions, the conversion of benzyl alcohol was 17. Read More

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December 2018
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Janus multi-responsive superparamagnetic nanoparticles functionalized with two on-demand and independently cleavable ligands for Actinide separation.

J Colloid Interface Sci 2018 Dec 7;538:546-558. Epub 2018 Dec 7.

State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China. Electronic address:

Hypothesis: Nanoparticles functionalized with ligands which can on-demand and remotely be detached have recently attracted interest as stimuli-responsive materials. Research is now focused on multi-responsive systems, with applications in environmental science and biomedicine. The possibility to covalently couple two different ligands on a single nanoparticles, and to release them independently is investigated. Read More

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December 2018
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Effects of cellular differentiation in human primary bronchial epithelial cells: Metabolism of 4-(methylnitrosamine)-1-(3-pyridyl)-1-butanone.

Toxicol In Vitro 2018 Dec 12. Epub 2018 Dec 12.

Division of Genetic and Molecular Toxicology, Division of Biochemical Toxicology, National Center for Toxicological Research, U.S Food and Drug Administration, Jefferson, AR 72079, United States. Electronic address:

Many of the toxicants in tobacco smoke undergo biotransformation in the lungs of smokers, both to reactive and to detoxified derivatives. Human air-liquid-interface (ALI) airway tissue models have emerged as an advanced in vitro model for evaluating the toxicity of inhaled substances; however, the metabolic potential of these cultures has not been evaluated extensively. In this study, we compared the metabolic activities of an ALI tissue model to the undifferentiated normal human primary bronchial epithelial (NHBE) cells from which it was derived. Read More

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December 2018
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Galvanic displacement-induced codeposition of reduced-graphene-oxide/silver on alloy fibers for non-destructive SPME@SERS analysis of antibiotics.

Mikrochim Acta 2018 Dec 14;186(1):19. Epub 2018 Dec 14.

Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong, 250100, People's Republic of China.

This work describes the integration of solid-phase microextraction (SPME) and surface-enhanced Raman spectroscopy (SERS) by codeposition of a hybrid consisting of reduced graphene oxide and silver on silver-copper alloy fibers. The morphology and structure of the coating were characterized by a variety of microscopic and spectroscopic techniques that confirmed the hybrid structure of the material. A galvanic-displacement-induced process is assumed to be involved during the codeposition of the hybrid coating on the alloy. Read More

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December 2018

A note on evolution of pressure and flow within an evaporating capillary bridge.

Eur Phys J E Soft Matter 2018 Dec 5;41(12):140. Epub 2018 Dec 5.

Duke University, Mechanical Engineering and Materials Science Dept., Durham, NC, USA.

Experiments with evaporation of capillary bridges between two glass spheres show that the bridge gorge radius decreases much faster than the contact radius, distorting the original constant mean curvature bridge shape. In addition, the Laplace pressure calculated from local principal curvatures exhibits high gradients along the bridge moving external surface, most commonly with a high suction near the triple phase contact and positive pressure near the gorge. The high suction results from a negative external curvature at contact. Read More

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December 2018
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Reply to: Characterizing coral skeleton mineralogy with Raman spectroscopy.

Nat Commun 2018 Dec 14;9(1):5324. Epub 2018 Dec 14.

Department of Marine Biology, The Leon H. Charney School of Marine Sciences, University of Haifa, Mt. Carmel, 3498838, Haifa, Israel.

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December 2018