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Guillaume Croville, Charlotte Foret, Pauline Heuillard, Alexis Senet, Mattias Delpont, Mohammed Mouahid, Mariette F Ducatez, Faouzi Kichou, Jean-Luc Guerin
Respiratory syndromes (RS) are among the most significant pathological conditions in food animals and are caused by complex coactions of pathogens and environmental factors. In poultry, low pathogenic avian Influenza A viruses, metapneumoviruses, infectious bronchitis virus, infectious laryngotracheitis virus, Mycoplasma spp. Escherichia coli and/or Ornithobacterium rhinotracheale (ORT) in turkeys, are considered as key co-infectious agents of respiratory syndromes. Aspergillus sp., Pasteurella multocida, Avibacterium paragallinarum or Chlamydia psittaci may also be involved in respiratory outbreaks...
January 19, 2018: Avian Pathology: Journal of the W.V.P.A
Junjie Zhong, Jason Riordon, Seyed Hadi Zandavi, Yi Xu, Aaron Harrinarine Persad, Farshid Mostowfi, David Sinton
Condensation at the nanoscale is essential to understanding many natural and synthetic systems relevant to water, air and energy. Despite its importance, the underlying physics of condensation initiation and propagation remain largely unknown at sub-10 nm, mainly due to the challenges of controlling and probing such small systems. Here we study the condensation of n-propane down to 8-nm confinement in a nanofluidic system, distinct from previous studies at ~100 nm. The condensation initiates significantly earlier in the 8-nm channels and it initiates from the entrance, in contrast to channels just 10-times larger...
January 11, 2018: Journal of Physical Chemistry Letters
Noor Muhammad, Sohail Nadeem, M T Mustafa
Theoretical analysis has been carried out to establish the heat transport phenomenon of six different ferromagnetic MnZnFe2O4-C2H6O2 (manganese zinc ferrite-ethylene glycol), NiZnFe2O4-C2H6O2 (Nickel zinc ferrite-ethylene glycol), Fe2O4-C2H6O2 (magnetite ferrite-ethylene glycol), NiZnFe2O4-H2O (Nickel zinc ferrite-water), MnZnFe2O4-H2O (manganese zinc ferrite-water), and Fe2O4-H2O (magnetite ferrite-water) nanofluids containing manganese zinc ferrite, Nickel zinc ferrite, and magnetite ferrite nanoparticles dispersed in a base fluid of ethylene glycol and water mixture...
2018: PloS One
Elisa I Martín, Antonio Sánchez-Coronilla, Javier Navas, Roberto Gómez-Villarejo, Paloma Martínez-Merino, Rodrigo Alcántara, Concha Fernández-Lorenzo
A molecular dynamics study based on gold nanofluids performed with and without the presence of tetraoctylammonium halide as a surfactant in a base fluid is presented. The base fluid consisting of a mixture of biphenyl and diphenyl oxide is used in concentrating solar power (CSP) plants. The radial distribution functions (RDFs) and spatial distribution functions (SDFs) were analysed with the temperature. Theoretical results indicate that the surfactant acts as a kind of net around the nanoparticle that plays an active role in enhancing the thermal properties of the gold nanofluid system...
January 8, 2018: Physical Chemistry Chemical Physics: PCCP
Dongshuai Hou, Tao Li
The transport and adsorption behavior of ions and water in nanometer pores is influenced by the composition of the substrate. In this paper, to understand the effect of Al species on the properties of confined nanofluids, molecular dynamics is utilized to study the structure, dynamics and interfacial adsorption behavior of NaCl solution confined in the gel pores of C-S-H and C-A-S-H. The bridging silicate tetrahedron substituted by the aluminate species enhances the hydrophilic properties of C-S-H gel. As compared with water on the C-S-H surface, the water layered packing is densified and the magnitude of dipole moment is enlarged for water located in the vicinity of the C-A-S-H surface...
January 8, 2018: Physical Chemistry Chemical Physics: PCCP
Lingyan Gong, Wei Ouyang, Zirui Li, Jongyoon Han
Electrokinetic concentration devices based on the ion concentration polarization (ICP) phenomenon have drawn much attention due to their simple setup, high enrichment factor, and easy integration with many subsequent processes, such as separation, reaction, and extraction etc. Despite significant progress in the experimental research, fundamental understanding and detailed modeling of the preconcentration systems is still lacking. The mechanism of the electrokinetic trapping of charged particles is currently limited to the force balance analysis between the electric force and fluid drag force in an over-simplified one-dimensional (1D) model, which misses many signatures of the actual system...
December 2017: AIP Advances
Ruirui Li, Xin Sui, Chao Li, Jiaqiao Jiang, Jin Zhai, Longcheng Gao
Gas messenger molecule Nitric Oxide (NO) plays important roles in K+ nanochannels of guard cells by binding directly to the heme-containing enzymes. Inspired by this natural phenomenon, we developed artificial K+ nanochannels modified with ferroporphyrin, where NO triggered the nanochannels turn to be "ON" states from the ferroporphyrin blocked "OFF" states. The mechanism relies on the fact that NO has higher affinity with ferroporphyrin compared to carboxyl groups on the nanochannels surface. The synergistic effect of the released carboxyl groups and the conically asymmetric shape leads the ion transportation to be diode-like...
January 5, 2018: ACS Applied Materials & Interfaces
Rodolphe Marie, Jonas N Pedersen, Kalim U Mir, Brian Bilenberg, Anders Kristensen
Nucleotide incorporation by DNA polymerase forms the basis of DNA sequencing-by-synthesis. In current platforms, either the single-stranded DNA or the enzyme is immobilized on a solid surface to locate the incorporation of individual nucleotides in space and/or time. Solid-phase reactions may, however, hinder the polymerase activity. We demonstrate a device and a protocol for the enzymatic labeling of genomic DNA arranged in a dense array of single molecules without attaching the enzyme or the DNA to a surface...
January 4, 2018: Nanoscale
Dinh-Tuan Phan, Lin Jin, Shofarul Wustoni, Chia-Hung Chen
To perform precision medicine in real-time, a sensor capable of continuously monitoring target biomolecules secreted from a patient under dynamic situations is essential. In this study, a novel portable device combining an aptamer probe and a nanofluidic component was developed, enabling the buffer-free continuous monitoring of small molecules in biological fluids. This integration is synergistic: the aptamer sensor is used to bind target biomolecules, triggering a fluorescence signal change, while the nanofluidic component is applied to achieve ion concentration polarization and convert serum into a clean buffer for aptamer signal regeneration...
January 4, 2018: Lab on a Chip
Xiaofen Yu, Qibai Wu, Haiyan Zhang, Guoxun Zeng, Wenwu Li, Yannan Qian, Yang Li, Guoqiang Yang, Muyu Chen
With the rapid development of industry, heat removal and management is a major concern for any technology. Heat transfer plays a critically important role in many sectors of engineering; nowadays utilizing nanofluids is one of the relatively optimized techniques to enhance heat transfer. In the present work, a facile low-temperature solvothermal method was employed to fabricate the SnO₂/reduced graphene oxide (rGO) nanocomposite. X-ray diffraction (XRD), thermogravimetric analysis (TGA), X-ray photoelectron spectroscope (XPS), Raman spectroscopy, and transmission electron microscopy (TEM) have been performed to characterize the SnO₂/rGO nanocomposite...
December 27, 2017: Materials
Morten M C H van Schie, Kourosh Honarmand Ebrahimi, Wilfred R Hagen, Peter-Leon Hagedoorn
Recent developments in microfluidic and nanofluidic technologies have resulted in development of new chip-based microfluidic calorimeters with potential use in different fields. One application would be the accurate high-throughput measurement of enzyme activity. Calorimetry is a generic way to measure activity of enzymes, but unlike conventional calorimeters, chip-based calorimeters can be easily automated and implemented in high-throughput screening platforms. However, application of chip-based microfluidic calorimeters to measure enzyme activity has been limited due to problems associated with miniaturization such as incomplete mixing and a decrease in volumetric heat generated...
December 20, 2017: Analytical Biochemistry
R L Yang, Y P Zheng, T Y Wang, P P Li, Y D Wang, D D Yao, L X Chen
A series of core/shell nanoparticle organic/inorganic hybrid materials (NOHMs) with different weight ratios of two components, consisting of multi-walled carbon nanotubes (MWCNTs) and silicon dioxide (SiO2) as the core were synthesized. The NOHMs display a liquid-like state in the absence of solvent at room temperature. Five NOHMs were categorized into three kinds of structure states based on different weight ratio of two components in the core, named the power strip model, the critical model and the collapse model...
December 15, 2017: Nanotechnology
Nuria Navarrete, Alexandra Gimeno-Furio, Rosa Mondragon, Leonor Hernandez, Luis Cabedo, Eloisa Cordoncillo, J Enrique Julia
Nanofluids using nanoencapsulated Phase Change Materials (nePCM) allow increments in both the thermal conductivity and heat capacity of the base fluid. Incremented heat capacity is produced by the melting enthalpy of the nanoparticles core. In this work two important advances in this nanofluid type are proposed and experimentally tested. It is firstly shown that metal and metal alloy nanoparticles can be used as self-encapsulated nePCM using the metal oxide layer that forms naturally in most commercial synthesis processes as encapsulation...
December 14, 2017: Scientific Reports
Yu Ma, Jinxiu Guo, Laibing Jia, Yanbo Xie
The nanofluidic diode, as one of the emerging nanofluidic logic devices, has been used in many fields such as biosensors, energy harvesting and so on. However, the entrance effects of the nanofluidic ionic conductance were less discussed, which can be a crucial factor for the ionic conduction. Here we calculate the ionic conductance as a function of the length-to-pore ratio (L/r), which has a clear boundary between nanopore (surface dominated) and nanochannel (geometry dominated) electrically in diluted salt solution...
December 13, 2017: ACS Sensors
Mohammad Amani, Pouria Amani, Alibakhsh Kasaeian, Omid Mahian, Ioan Pop, Somchai Wongwises
This research investigates the applicability of an ANN and genetic algorithms for modeling and multiobjective optimization of the thermal conductivity and viscosity of water-based spinel-type MnFe2O4 nanofluid. Levenberg-Marquardt, quasi-Newton, and resilient backpropagation methods are employed to train the ANN. The support vector machine (SVM) method is also presented for comparative purposes. Experimental results demonstrate the efficacy of the developed ANN with the LM-BR training algorithm and the 3-10-10-2 structure for the prediction of the thermophysical properties of nanofluids in terms of the significantly superior accuracy compared to developing the correlation and employing SVM regression...
December 12, 2017: Scientific Reports
Mara Fanelli, Alessia Camperchioli, Lella Petrella, Marco Petrillo, Cinzia Baranello, Pina Baccaro, Carmela Paolillo, Ettore Capoluongo, Giovanni Scambia
BACKGROUND: In this study we investigated the function of the non-catalytic region of tyrosine kinase adaptor protein 2 (NCK2) and its correlation with ITGB1 and ITGB4 integrins in driving ovarian cancer (OvCa) aggressiveness. We also evaluated whether NCK2 may influence prognosis in OvCa patients. METHODS: Nanofluidic technology was used to analyze expression of NCK2 in 332 OvCa patients. To evaluate mRNA expression of NCK2, integrins and VEGFA in OvCa cell lines, qRT-PCR was performed...
December 5, 2017: International Journal of Biological Markers
Qianqian Zhang, Jianxin Kang, Zhiqiang Xie, Xungang Diao, Zhaoyue Liu, Jin Zhai
Many ion channels in the cell membrane are believed to function as gates that control the water and ion flow through the transitions between an inherent hydrophobic state and a stimuli-induced hydration state. The construction of nanofluidic gating systems with high gating efficiency and reversibility is inspired by this hydrophobic gating behavior. A kind of electrically actuated nanochannel is developed by integrating a polypyrrole (PPy) micro/nanoporous film doped with perfluorooctanesulfonate ions onto an anodic aluminum oxide nanoporous membrane...
December 7, 2017: Advanced Materials
Dianchen Lu, M Ramzan, Naeem Ullah, Jae Dong Chung, Umer Farooq
A numerical investigation of steady three dimensional nanofluid flow carrying effects of gyrotactic microorganism with anisotropic slip condition along a moving plate near a stagnation point is conducted. Additionally, influences of Arrhenius activation energy, joule heating accompanying binary chemical reaction and viscous dissipation are also taken into account. A system of nonlinear differential equations obtained from boundary layer partial differential equations is found by utilization of apposite transformations...
December 5, 2017: Scientific Reports
Yanan Jiang, Yaping Feng, Jianjian Su, Jingxin Nie, Liuxuan Cao, Lanqun Mao, Lei Jiang, Wei Guo
The discovery of ionic current rectification (ICR) phenomena in synthetic nanofluidic systems elicits broad interest from interdisciplinary fields of chemistry, physics, materials science, and nanotechnology; and thus, boosts their applications in, for example, chemical sensing, fluidic pumping, and energy related aspects. So far, it is generally accepted that the ICR effect stems from the broken symmetry either in the nanofluidic structures, or in the environmental conditions. Although this empirical regularity is supported by numerous experimental and theoretical results, great challenge still remains to precisely figure out the correlation between the asymmetric ion transport properties and the degree of symmetry breaking...
November 29, 2017: Journal of the American Chemical Society
Kuo-Tang Liao, Joshua Schumacher, Henri J Lezec, Samuel M Stavis
The vertical dimensions of complex nanostructures determine the functions of diverse nanotechnologies. In this paper, we investigate the unknown limits of such structure-function relationships at subnanometer scales. We begin with a quantitative evaluation of measurement uncertainty from atomic force microscopy, which propagates through our investigation from ion beam fabrication to fluorescent particle characterization. We use a focused beam of gallium ions to subtractively pattern silicon surfaces, and silicon nitride and silicon dioxide films...
November 29, 2017: Lab on a Chip
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