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https://www.readbyqxmd.com/read/28817769/a-paper-based-surface-enhanced-raman-scattering-lateral-flow-strip-for-detection-of-neuron-specific-enolase-in-blood-plasma
#1
Xuefei Gao, Peng Zheng, Sujan Kasani, Steven Wu, Feng Yang, Sara Lewis, Sara Nayeem, Elizabeth Engler-Chiurazzi, Jane Wigginton, James W Simpkins, Nianqiang Wu
An inexpensive and disposable paper-based lateral flow strip (PLFS) has been developed as an immunoassay, in which surface-enhanced Raman scattering (SERS) is utilized for sensing signal transduction. The Au nanostar@Raman Reporter@silica sandwich nanoparticles are developed as the SERS probes, which is the key to high sensitivity of device. Compared with a colorimetric PLFS, the SERS-PLFS exhibits superior performance in terms of sensitivity and limit of detection (LOD) in a blood plasma-containing sample matrix...
August 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28816943/spinal-cord-compression-syndrome-caused-by-intraspinal-epidural-fibrous-cord-three-case-reports
#2
Yingjie Zhou, Xubin Chai, Huailiang Zheng, Renqian Song, Xiaofei Qin
RATIONALE: The spinal cord compression caused by intraspinal epidural fibrous cord. PATIENT CONCERNS: All patients in this study had spinal cord compression syndrome caused by an intraspinal epidural fibrous cord, manifested as abnormally increased epidural adipose tissue by imaging. DIAGNOSE: These abnormal fibrous connective tissue strips were not identical to the known pathological tissue such as "meningovertebral ligament." Instead, it might be a novel pathogenic cause for the spinal cord compression...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816245/ram-pressure-feeding-of-supermassive-black-holes
#3
Bianca M Poggianti, Yara L Jaffé, Alessia Moretti, Marco Gullieuszik, Mario Radovich, Stephanie Tonnesen, Jacopo Fritz, Daniela Bettoni, Benedetta Vulcani, Giovanni Fasano, Callum Bellhouse, George Hau, Alessandro Omizzolo
When a supermassive black hole at the centre of a galaxy accretes matter, it gives rise to a highly energetic phenomenon: an active galactic nucleus. Numerous physical processes have been proposed to account for the funnelling of gas towards the galactic centre to feed the black hole. There are also several physical processes that can remove gas from a galaxy, one of which is ram-pressure stripping by the hot gas that fills the space between galaxies in galaxy clusters. Here we report that six out of a sample of seven 'jellyfish' galaxies-galaxies with long 'tentacles' of material that extend for dozens of kiloparsecs beyond the galactic disks-host an active nucleus, and two of them also have galactic-scale ionization cones...
August 16, 2017: Nature
https://www.readbyqxmd.com/read/28816188/assessment-of-changes-in-nickel-and-chromium-levels-in-the-gingival-crevicular-fluid-during-fixed-orthodontic-treatment
#4
Vinny Bhasin, Swati J Pustake, Viprat Joshi, Anil Tiwari, Meenakshi Bhasin, Ramandeep S Punia
BACKGROUND: Various components of appliances used in fixed orthodontic treatment are fabricated from materials that are highly resistant in nature and have high strength and biocompatibility. Corrosion of materials occurs inside the oral cavity due to numerous environmental or oral factors that act on them. These factors include temperature, pH variation, salivary conditions, mechanical loads, microbiological and enzymatic activity, and various food components. Gingival crevicular fluid (GCF) is the material obtained from the gingival sulcus and might act as a potential source for various biomarkers in the orthodontic setup because inflammatory-induced response is directly related to orthodontic forces in GCF...
August 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28816183/impact-of-polishing-systems-on-the-surface-roughness-and-microhardness-of-nanocomposites
#5
Yasser Alfawaz
AIM: The aim of this article is to evaluate the influence of finishing and polishing techniques on the surface roughness and microhardness of two composite resins with two different types of polishing systems. MATERIALS AND METHODS: A total of 30 disk-shaped specimens of nanocomposite Filtek™ Z350 and Ceram-X® were prepared. They were divided into three groups. The control group (n = 10) received no finishing and polishing. The remaining specimens were divided into two groups, and they received polishing and finishing either with PoGo or Sof-Lex system...
August 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28816040/carbon-nanotube-thread-electrochemical-cell-detection-of-heavy-metals
#6
Daoli Zhao, David Siebold, Noe T Alvarez, Vesselin N Shanov, William R Heineman
In this work, all three electrodes in an electrochemical cell were fabricated based on carbon nanotube (CNT) thread. CNT thread partially insulated with a thin polystyrene coating to define the microelectrode area was used as the working electrode; bare CNT thread was used as the auxiliary electrode; and a micro quasi-reference electrode was fabricated by electroplating CNT thread with Ag and then anodizing it in chloride solution to form a layer of AgCl. The AgǀAgCl coated CNT thread electrode provided a stable potential comparable to the conventional liquid-junction type AgǀAgCl reference electrode...
August 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28815005/phase-i-study-evaluating-the-safety-tolerability-and-pharmacokinetics-of-a-novel-oral-dissolvable-film-containing-dexamethasone-versus-fortecortin-dexamethasone-tablets
#7
Zuzana Diamant, Gabriella Samuelsson Palmgren, Bengt Westrin, Leif Bjermer
Introduction: Systemic corticosteroids are anti-inflammatory agents with dexamethasone among the most potent in the class. Within (respiratory) allergy, systemic corticosteroids are usually applied in medical emergencies. In these situations, patients may experience physical or logistic problems taking tablets. To fulfil a practical unmet need for outpatients, Dexa ODF, an oral dissolvable film containing dexamethasone, was developed. Objectives: We compared the safety, tolerability and pharmacokinetics (PK) of Dexa ODF with Fortecortin tablets in healthy subjects...
2017: European Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28813593/ptni-nanocrystals-supported-on-hollow-carbon-spheres-enhancing-the-electrocatalytic-performance-through-high-temperature-annealing-and-electrochemical-co-stripping-treatments
#8
Chunmei Zhang, Ruizhong Zhang, Xiaokun Li, Wei Chen
PtNi nanoparticles have been proved to be a type of highly efficient electrocatalyst for the oxygen reduction reaction (ORR) among the Pt-based nanomaterials. However, how to improve the surface catalytic activity and stability of polymer-stabilized Pt-based nanocrystals is still a critical issue for their application in fuel cells. In this work, a one-step solvothermal process was used to synthesize PVP-stabilized PtNi nanocubes supported on hollow carbon spheres. With optimized metal precursor ratio (Pt/Ni=1:1) and solvothermal temperature (130 oC), PtNi nanocrystals with uniform size and cubic shape can be synthesized and highly dispersed on hollow carbon spheres...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28811557/separating-vegetation-greening-and-climate-change-controls-on-evapotranspiration-trend-over-the-loess-plateau
#9
Zhao Jin, Wei Liang, Yuting Yang, Weibin Zhang, Jianwu Yan, Xuejuan Chen, Sha Li, Xingguo Mo
Evapotranspiration (ET) is a key ecological process connecting the soil-vegetation-atmosphere system, and its changes seriously affects the regional distribution of available water resources, especially in the arid and semiarid regions. With the Grain-for-Green project implemented in the Loess Plateau (LP) since 1999, water and heat distribution across the region have experienced great changes. Here, we investigate the changes and associated driving forces of ET in the LP from 2000 to 2012 using a remote sensing-based evapotranspiration model...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810215/continuous-operation-of-thermophilic-food-waste-digestion-with-side-stream-ammonia-stripping
#10
Wei Zhang, Sonia Heaven, Charles J Banks
Digesters fed on food waste (high nitrogen content) were operated successfully over an extended period using sidestream biogas stripping to control total ammonia nitrogen (TAN) below inhibitory concentrations. This is the first time biogas stripping has been used to achieve stable thermophilic operation with undiluted substrate of this type. Stripping columns operated batch-wise treated the equivalent of 1.7-4.1% of digester contents daily at pH >10 and 70°C, with no detrimental effect on digestion. TKN removal was 54%, with potential to recover 3...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28809875/bi-directional-top-hat-d-scan-single-beam-accurate-characterization-of-nonlinear-waveguides
#11
Samuel Serna, Nicolas Dubreuil
The characterization of a third-order nonlinear integrated waveguide is reported for the first time by means of a top-hat dispersive-scan (D-Scan) technique, a temporal analog of the top-hat Z-Scan. With a single laser beam, and by carrying two counterdirectional nonlinear transmissions to assess the input and output coupling efficiencies, a novel procedure is described leading to accurate measurement of the TPA figure of merit, the effective two-photon absorption (TPA), and optical Kerr (including the sign) coefficients...
August 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28809842/noninvasive-sampling-of-mucosal-lining-fluid-for-the-quantification-of-in-vivo-upper-airway-immune-mediator-levels
#12
Helene M Wolsk, Bo L Chawes, Jonathan Thorsen, Jakob Stokholm, Klaus Bønnelykke, Susanne Brix, Hans Bisgaard
This protocol describes noninvasive sampling of undisturbed upper airway mucosal lining fluid. It also details the extraction procedure used prior to the analysis of immune mediators in fluid eluates for the study of the airway topical immune signature, without the need for stimulation procedures (often used by other techniques). The mucosal lining fluid is sampled on a strip of filter paper placed at the anterior part of the inferior turbinate and left for 2 min of absorption. Analytes are eluted from the filter papers, and the extracted protein-based eluates are analyzed by an electrochemiluminescence-based immunoassay, allowing for the high-sensitivity quantification of low- and high-level analytes in the same sample...
August 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28807870/an-open-multi-vendor-multi-field-strength-brain-mr-dataset-and-analysis-of-publicly-available-skull-stripping-methods-agreement
#13
REVIEW
Roberto Souza, Oeslle Lucena, Julia Garrafa, David Gobbi, Marina Saluzzi, Simone Appenzeller, Letícia Rittner, Richard Frayne, Roberto Lotufo
This paper presents an open, multi-vendor, multi-field strength magnetic resonance (MR) T1-weighted volumetric brain imaging dataset, named Calgary-Campinas-359 (CC-359). The dataset is composed of images of older healthy adults (29-80 years) acquired on scanners from three vendors (Siemens, Philips and General Electric) at both 1.5 T and 3 T. CC-359 is comprised of 359 datasets, approximately 60 subjects per vendor and magnetic field strength. The dataset is approximately age and gender balanced, subject to the constraints of the available images...
August 11, 2017: NeuroImage
https://www.readbyqxmd.com/read/28807818/novel-concentrated-water-in-oil-emulsions-based-on-a-non-ionic-silicone-surfactant-appealing-application-properties-and-tuneable-viscoelasticity
#14
Lisa Binder, Johannes Jatschka, Dieter Baurecht, Michael Wirth, Claudia Valenta
Silicone excipients are non-irritating ingredients that are extensively used in topical formulations. In the present study, innovative water-in-oil emulsions with a high water content stabilised by a non-ionic silicone surfactant were developed. Effects of formulation composition on its properties and stability were investigated. It was possible to prepare highly stable emulsions with a water volume fraction of up to 80%. The emulsions exhibited desirable application properties such as non-sticky and cooling qualities...
August 11, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28807294/recombinase-polymerase-amplification-rpa-combined-with-lateral-flow-lf-strip-for-detection-of-toxoplasma-gondii-in-the-environment
#15
Y D Wu, M J Xu, Q Q Wang, C X Zhou, M Wang, X Q Zhu, D H Zhou
Toxoplasma gondii infects all warm-blooded vertebrates, resulting in a great threat to human health and significant economic loss to the livestock industry. Ingestion of infectious oocysts of T. gondii from the environment is the major source of transmission. Detection of T. gondii oocysts by existing methods is laborious, time-consuming and expensive. The objective of the present study was to develop a recombinase polymerase amplification (RPA) method combined with a lateral flow (LF) strip for detection of T...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28806833/-dynamic-correction-of-scapholunate-instability-using-an-ecrl-tendon-strip-and-a-free-pl-interponat
#16
Evelin Soleman, Lukas Fatzer, Tomas Sanchez
The present article describes our technique of correction of static reduceable scapholunate instability.
August 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28806669/griess-reaction-based-paper-strip-for-colorimetric-fluorescent-sers-triple-sensing-of-nitrite
#17
Dan Li, Yadan Ma, Huazhen Duan, Wei Deng, Dawei Li
This study demonstrates a novel strategy for colorimetric/fluorescent/surface enhanced Raman scattering (SERS) triple-mode sensing of nitrite based on Griess reaction modulated gold nanorods (GNRs)-Azo-gold nanoparticles (GNPs) (GNRs-Azo-GNPs) assembly. The p-aminothiophenol (PATP)-capped GNRs (GNRs@PATP) and 1,8-diaminonaphthalene (DAP)-modified GNPs (GNPs@DAP) are first synthesized through Au-S and Au-N bonds, respectively. Upon being excited at 365nm, the dispersion of GNRs-GNPs (GNRs@PATP and GNPs@DAP) emits cyan fluorescence...
August 8, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28806517/from-non-luminescent-cs4pbx6-x-cl-br-i-nanocrystals-to-highly-luminescent-cspbx3-nanocrystals-water-triggered-transformation-through-a-csx-stripping-mechanism
#18
Linzhong Wu, Huicheng Hu, Yong Xu, Shu Jiang, Min Chen, Qixuan Zhong, Di Yang, Qipeng Liu, Yun Zhao, Baoquan Sun, Qiao Zhang, Yadong Yin
We report a novel CsX-stripping mechanism which enables efficient chemical transformation of non-luminescent Cs4PbX6 (X = Cl, Br, I) nanocrystals (NCs) to highly luminescent CsPbX3 NCs. During the transformation, Cs4PbX6 NCs dispersed in a nonpolar solvent are converted into CsPbX3 NCs by stripping CsX through an interfacial reaction with water in a different phase. This process takes advantage of the high solubility of CsX in water as well as the ionic nature and high ion diffusion property of Cs4PbX6 NCs, and produces monodisperse and air-stable CsPbX3 NCs with controllable halide composition, tunable emission wavelength covering the full visible range, narrow emission width, and high photoluminescent quantum yield (up to 75%)...
August 14, 2017: Nano Letters
https://www.readbyqxmd.com/read/28806289/augmentation-of-the-nasal-dorsum-using-the-multi-stripped-autologous-cartilage-technique-mact
#19
Liqiang Liu, Zhaoyun Bu, Jincai Fan, Jia Tian, Cheng Gan, Zengjie Yang, Hu Jiao
Nasal augmentation is a popular modern technique requested by many Asian people.There are two kinds of autologous cartilage used to augment the nose at present: carved as a monobloc or diced into pieces. Each approach has its pros and cons.We performed our surgical technique on a group of 28 patients. Twenty of these patients had had several rhinoplasties performed before referral to our hospital; 8 of these patients had undergone a primary rhinoplasty. bilateral conchal, nasal septum, or rib cartilage were harvested, deep temporal fascia or abdominal muscle fascia to be prepared for packing stripped cartilage were also removed at this time...
August 3, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28805825/the-processing-and-heterostructuring-of-silk-with%C3%A2-light
#20
Mehra S Sidhu, Bhupesh Kumar, Kamal P Singh
Spider silk is a tough, elastic and lightweight biomaterial, although there is a lack of tools available for non-invasive processing of silk structures. Here we show that nonlinear multiphoton interactions of silk with few-cycle femtosecond pulses allow the processing and heterostructuring of the material in ambient air. Two qualitatively different responses, bulging by multiphoton absorption and plasma-assisted ablation, are observed for low- and high-peak intensities, respectively. Plasma ablation allows us to make localized nanocuts, microrods, nanotips and periodic patterns with minimal damage while preserving molecular structure...
August 14, 2017: Nature Materials
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