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https://www.readbyqxmd.com/read/28813013/recent-advances-in-electrospun-nanofiber-interfaces-for-biosensing-devices
#1
REVIEW
Eleni Sapountzi, Mohamed Braiek, Jean-François Chateaux, Nicole Jaffrezic-Renault, Florence Lagarde
Electrospinning has emerged as a very powerful method combining efficiency, versatility and low cost to elaborate scalable ordered and complex nanofibrous assemblies from a rich variety of polymers. Electrospun nanofibers have demonstrated high potential for a wide spectrum of applications, including drug delivery, tissue engineering, energy conversion and storage, or physical and chemical sensors. The number of works related to biosensing devices integrating electrospun nanofibers has also increased substantially over the last decade...
August 16, 2017: Sensors
https://www.readbyqxmd.com/read/28812871/high-performance-porous-molybdenum-oxynitride-based-fiber-supercapacitors
#2
Dan Ruan, Rui Lin, Kui Jiang, Xiang Yu, Yaofeng Zhu, Yaqin Fu, Zilong Wang, He Yan, Wenjie Mai
Scalable manufacturing of flexible, fiber-shaped energy storage devices has enabled great technological advances in wearable and portable technology. Replacing inefficient oxides with inexpensive and high-performance oxynitrides with more favourable 3D structures is critical if the practical applications of these technologies are to be realised. Here we developed a facile and controllable approach for the synthesis of 3D porous micropillars of molybdenum oxynitride, which exhibit high conductivity, robust stability and excellent energy storage properties...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28812866/directly-coating-multifunctional-interlayer-on-the-cathode-via-electrospinning-for-advanced-lithium-sulfur-batteries
#3
Yueying Peng, Yiyong Zhang, Yunhui Wang, Xiu Shen, Feng Wang, He Li, Bing-Joe Hwang, Jinbao Zhao
Lithium sulfur battery is considered as a prospective candidate for high-energy-storage system as its high theoretical specific capacity and energy. However, the dissolution and shutter of polysulfides lead to low active material utilization and fast capacity fading. Electrospinning technology is employed to directly coat an interlayer composed of polyacrylonitrile (PAN) and nitrogen-doped carbon black (NC) fibers on the cathode. Benefited from electrospinning technology, the PAN-NC fibers possess good electrolyte infiltration for fast lithium-ion transport and great flexibility for adhering on the cathode...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28811669/paraventricular-thalamic-control-of-food-intake-and-reward-role-of-glucagon-like-peptide-1-receptor-signaling
#4
Zhi Yi Ong, Jing-Jing Liu, Zhiping P Pang, Harvey J Grill
Paraventricular thalamic nucleus (PVT) neurons receive hindbrain and hypothalamic inputs, and project to forebrain sites involved in reward and motivation function. The role of PVT in energy balance and reward control is however understudied. Given that PVT neurons express glucagon-like peptide-1 receptors (GLP-1R), which are critical to feeding and body weight control, we tested the hypothesis that PVT GLP-1R signaling contributes to food intake and reward inhibition. To assess the hypothesis, behavioral tests including chow and high-fat diet intake, meal patterns, conditioned place preference for high-fat food, cue-induced reinstatement of sucrose-seeking, and motivation to work for sucrose were employed following intra-PVT delivery of either GLP-1R agonist, exendin-4 (Ex4), or GLP-1R antagonist, exendin-9-39 (Ex9)...
July 19, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28810228/evolution-of-molecular-weight-and-fluorescence-of-effluent-organic-matter-efom-during-oxidation-processes-revealed-by-advanced-spectrographic-and-chromatographic-tools
#5
Zhiqiang Chen, Mo Li, Qinxue Wen, Nanqi Ren
Effluent organic matter (EfOM) is an emerging concern to receiving aquatic environment due to its refractory property. The degradation of EfOM in ozonation and other two advanced oxidation processes (AOPs), UV/H2O2 and UV/persulfate (PS), was investigated in this study. Fluorescence spectra coupled with parallel factor analysis (PARAFAC) and two-dimensional correlation gel permeation chromatography (2D-GPC) were used to track the evolution of EfOM during each oxidation process. Results showed that the degradation of EfOM indicated by dissolved organic carbon (DOC), UV254 and fluorescence components, fitted well with pseudo-first-order kinetic model during the oxidation processes...
August 4, 2017: Water Research
https://www.readbyqxmd.com/read/28809393/ythdc2-is-an-n-6-methyladenosine-binding-protein-that-regulates-mammalian-spermatogenesis
#6
Phillip J Hsu, Yunfei Zhu, Honghui Ma, Yueshuai Guo, Xiaodan Shi, Yuanyuan Liu, Meijie Qi, Zhike Lu, Hailing Shi, Jianying Wang, Yiwei Cheng, Guanzheng Luo, Qing Dai, Mingxi Liu, Xuejiang Guo, Jiahao Sha, Bin Shen, Chuan He
N(6)-methyladenosine (m(6)A) is the most common internal modification in eukaryotic mRNA. It is dynamically installed and removed, and acts as a new layer of mRNA metabolism, regulating biological processes including stem cell pluripotency, cell differentiation, and energy homeostasis. m(6)A is recognized by selective binding proteins; YTHDF1 and YTHDF3 work in concert to affect the translation of m(6)A-containing mRNAs, YTHDF2 expedites mRNA decay, and YTHDC1 affects the nuclear processing of its targets. The biological function of YTHDC2, the final member of the YTH protein family, remains unknown...
August 15, 2017: Cell Research
https://www.readbyqxmd.com/read/28808312/the-synchronous-improvement-of-strength-and-plasticity-sisp-in-new-ni-co-based-disc-superalloys-by-controling-stacking-fault-energy
#7
H Xu, Z J Zhang, P Zhang, C Y Cui, T Jin, Z F Zhang
It is a great challenge to improve the strength of disc superalloys without great loss of plasticity together since the microstructures benefiting the strength always do not avail the plasticity. Interestingly, this study shows that the trade-off relationship between strength and plasticity can be broken through decreasing stacking fault energy (SFE) in newly developed Ni-Co based disc superalloys. Axial tensile tests in the temperature range of 25 to 725 °C were carried out in these alloys with Co content ranging from 5% to 23% (wt...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28808004/critical-structural-fluctuations-of-proteins-upon-thermal-unfolding-challenge-the-lindemann-criterion
#8
Marina Katava, Guillaume Stirnemann, Marco Zanatta, Simone Capaccioli, Maria Pachetti, K L Ngai, Fabio Sterpone, Alessandro Paciaroni
Internal subnanosecond timescale motions are key for the function of proteins, and are coupled to the surrounding solvent environment. These fast fluctuations guide protein conformational changes, yet their role for protein stability, and for unfolding, remains elusive. Here, in analogy with the Lindemann criterion for the melting of solids, we demonstrate a common scaling of structural fluctuations of lysozyme protein embedded in different environments as the thermal unfolding transition is approached. By combining elastic incoherent neutron scattering and advanced molecular simulations, we show that, although different solvents modify the protein melting temperature, a unique dynamical regime is attained in proximity of thermal unfolding in all solvents that we tested...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28807238/unravelling-the-complexity-of-signalling-networks-in-cancer-a-review-of-the-increasing-role-for-computational-modelling
#9
REVIEW
John Garland
Cancer induction is a highly complex process involving hundreds of different inducers but whose eventual outcome is the same. Clearly, it is essential to understand how signalling pathways and networks generated by these inducers interact to regulate cell behaviour and create the cancer phenotype. While enormous strides have been made in identifying key networking profiles, the amount of data generated far exceeds our ability to understand how it all "fits together". The number of potential interactions is astronomically large and requires novel approaches and extreme computation methods to dissect them out...
September 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28805313/about-how-to-capture-and-exploit-the-co2-surplus-that-nature-per-se-is-not-capable-of-fixing
#10
Manuel S Godoy, Beatrice Mongili, Debora Fino, M Auxiliadora Prieto
Human activity has been altering many ecological cycles for decades, disturbing the natural mechanisms which are responsible for re-establishing the normal environmental balances. Probably, the most disrupted of these cycles is the cycle of carbon. In this context, many technologies have been developed for an efficient CO2 removal from the atmosphere. Once captured, it could be stored in large geological formations and other reservoirs like oceans. This strategy could present some environmental and economic problems...
August 14, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28804961/gaseous-nanocarving-mediated-carbon-framework-with-spontaneous-metal-assembly-for-structure-tunable-metal-carbon-nanofibers
#11
Dae-Hyun Nam, Sungwoo Lee, Young-Joo Lee, Jun-Hyun Jo, Euijoon Yoon, Kyung-Woo Yi, Gun-Do Lee, Young-Chang Joo
Vapor phase carbon (C)-reduction-based syntheses of C nanotubes and graphene, which are highly functional solid C nanomaterials, have received extensive attention in the field of materials science. This study suggests a revolutionary method for precisely controlling the C structures by oxidizing solid C nanomaterials into gaseous products in the opposite manner of the conventional approach. This gaseous nanocarving enables the modulation of inherent metal assembly in metal/C hybrid nanomaterials because of the promoted C oxidation at the metal/C interface, which produces inner pores inside C nanomaterials...
August 14, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28804491/phylloremediation-of-air-pollutants-exploiting-the-potential-of-plant-leaves-and-leaf-associated-microbes
#12
REVIEW
Xiangying Wei, Shiheng Lyu, Ying Yu, Zonghua Wang, Hong Liu, Dongming Pan, Jianjun Chen
Air pollution is air contaminated by anthropogenic or naturally occurring substances in high concentrations for a prolonged time, resulting in adverse effects on human comfort and health as well as on ecosystems. Major air pollutants include particulate matters (PMs), ground-level ozone (O3), sulfur dioxide (SO2), nitrogen dioxides (NO2), and volatile organic compounds (VOCs). During the last three decades, air has become increasingly polluted in countries like China and India due to rapid economic growth accompanied by increased energy consumption...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28804449/loss-of-leptin-induced-modulation-of-hippocampal-synaptic-trasmission-and-signal-transduction-in-high-fat-diet-fed-mice
#13
Marco Mainardi, Matteo Spinelli, Federico Scala, Andrea Mattera, Salvatore Fusco, Marcello D'Ascenzo, Claudio Grassi
Hippocampal plasticity is triggered by a variety of stimuli including sensory inputs, neurotrophins and inflammation. Leptin, whose primary function is to regulate food intake and energy expenditure, has been recently shown to affect hippocampal neurogenesis and plasticity. Interestingly, mice fed a high-fat diet (HFD) exhibit impaired hippocampal function, but the underlying mechanisms are poorly understood. To address this issue, we compared leptin responsiveness of hippocampal neurons in control and HFD-fed mice by combining single-cell electrophysiology and biochemical assays...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28803154/prospects-recent-advancements-and-challenges-of-different-wastewater-streams-for-microalgal-cultivation
#14
REVIEW
Abhishek Guldhe, Sheena Kumari, Luveshan Ramanna, Prathana Ramsundar, Poonam Singh, Ismail Rawat, Faizal Bux
Microalgae are recognized as one of the most powerful biotechnology platforms for many value added products including biofuels, bioactive compounds, animal and aquaculture feed etc. However, large scale production of microalgal biomass poses challenges due to the requirements of large amounts of water and nutrients for cultivation. Using wastewater for microalgal cultivation has emerged as a potential cost effective strategy for large scale microalgal biomass production. This approach also offers an efficient means to remove nutrients and metals from wastewater making wastewater treatment sustainable and energy efficient...
August 9, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28803063/cascading-biomethane-energy-systems-for-sustainable-green-gas-production-in-a-circular-economy
#15
REVIEW
David M Wall, Shane McDonagh, Jerry D Murphy
Biomethane is a flexible energy vector that can be used as a renewable fuel for both the heat and transport sectors. Recent EU legislation encourages the production and use of advanced, third generation biofuels with improved sustainability for future energy systems. The integration of technologies such as anaerobic digestion, gasification, and power to gas, along with advanced feedstocks such as algae will be at the forefront in meeting future sustainability criteria and achieving a green gas supply for the gas grid...
July 23, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28802767/real-rock-microfluidic-flow-cell-a-test-bed-for-real-time-in-situ-analysis-of-flow-transport-and-reaction-in-a-subsurface-reactive-transport-environment
#16
Rajveer Singh, Mayandi Sivaguru, Glenn A Fried, Bruce W Fouke, Robert A Sanford, Martin Carrera, Charles J Werth
Physical, chemical, and biological interactions between groundwater and sedimentary rock directly control the fundamental subsurface properties such as porosity, permeability, and flow. This is true for a variety of subsurface scenarios, ranging from shallow groundwater aquifers to deeply buried hydrocarbon reservoirs. Microfluidic flow cells are now commonly being used to study these processes at the pore scale in simplified pore structures meant to mimic subsurface reservoirs. However, these micromodels are typically fabricated from glass, silicon, or polydimethylsiloxane (PDMS), and are therefore incapable of replicating the geochemical reactivity and complex three-dimensional pore networks present in subsurface lithologies...
August 4, 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/28802391/pathophysiology-of-esophageal-impairment-due-to-button-battery-ingestion
#17
Johannes Völker, Christine Völker, Philipp Schendzielorz, Sebastian P Schraven, Andreas Radeloff, Robert Mlynski, Rudolf Hagen, Kristen Rak
BACKGROUND: The increased use of button batteries with high energy densities in devices of daily life presents a high risk of injury, especially for toddlers and young children. If an accidental ingestion of a button battery occurs, this foreign body can become caught in the constrictions of the esophagus and cause serious damage to the adjacent tissue layers. The consequences can be ulcerations, perforations with fistula formation and damage to the surrounding anatomical structures. In order to gain a better understanding of the pathophysiology after ingestion, we carried out systematic studies on fresh preparations of porcine esophagi...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28802332/new-algorithms-for-processing-time-series-big-eeg-data-within-mobile-health-monitoring-systems
#18
Mohamed Adel Serhani, Mohamed El Menshawy, Abdelghani Benharref, Saad Harous, Alramzana Nujum Navaz
BACKGROUND AND OBJECTIVES: Recent advances in miniature biomedical sensors, mobile smartphones, wireless communications, and distributed computing technologies provide promising techniques for developing mobile health systems. Such systems are capable of monitoring epileptic seizures reliably, which are classified as chronic diseases. Three challenging issues raised in this context with regard to the transformation, compression, storage, and visualization of big data, which results from a continuous recording of epileptic seizures using mobile devices...
October 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28802091/a-cyclic-and-intermittent-very-low-protein-diet-can-have-beneficial-effects-against-advanced-diabetic-nephropathy-in-wistar-fatty-fa-fa-rats-an-animal-model-of-type-2-diabetes-and-obesity
#19
Munehiro Kitada, Yoshio Ogura, Taeko Suzuki, Itaru Monnno, Keizo Kanasaki, Ai Watanabe, Daisuke Koya
A low-protein diet (LPD), particularly, very low-protein diet (VLPD) is expected for reno-protection in advanced chronic kidney disease, including diabetic nephropathy. We previously also demonstrated that a VLPD clearly improved advanced diabetic nephropathy in a type 2 diabetes and obesity rat. However, clinically, an everyday long-term VLPD contributes to poor adherence, which may be related to controvertial results of an LPD on the suppression for diabetic nephropathy, and has nutritional issues, such as sarcopenia or protein-energy wasting...
August 12, 2017: Nephrology
https://www.readbyqxmd.com/read/28801546/incoherent-scattering-can-favorably-influence-energy-filtering-in-nanostructured-thermoelectrics
#20
Aniket Singha, Bhaskaran Muralidharan
Investigating in detail the physics of energy filtering through a single planar energy barrier in nanostructured thermoelectric generators, we reinforce the non-trivial result that the anticipated enhancement in generated power at a given efficiency via energy filtering is a characteristic of systems dominated by incoherent scattering and is absent in ballistic devices. In such cases, assuming an energy dependent relaxation time τ(E) = kE (r) , we show that there exists a minimum value r min beyond which generation can be enhanced by embedding nanobarriers...
August 11, 2017: Scientific Reports
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