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https://www.readbyqxmd.com/read/28822314/a-portable-smart-phone-device-for-rapid-and-sensitive-detection-of-e-coli-o157-h7-in-yoghurt-and-egg
#1
Mohamed Maarouf Ali Zeinhom, Yijia Wang, Yang Song, Mei-Jun Zhu, Yuehe Lin, Dan Du
The detection of E. coli O157:H7 in foods has held the attention of many researchers because of the seriousness attributed to this pathogen. In this study, we present a simple, sensitive, rapid and portable smartphone based fluorescence device for E. coli O157:H7 detection. This field-portable fluorescent imager on the smartphone involves a compact laser-diode-based photosource, a long-pass (LP) thin-film interference filter and a high-quality insert lenses. The design of the device provided a low noise to background imaging system...
August 4, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28822276/exploiting-algal-mineralization-for-nanotechnology-bringing-coccoliths-to-the-fore
#2
REVIEW
Alastair W Skeffington, André Scheffel
Complex mineral structures are produced by many microalgal species. Pioneering work on diatom silica has demonstrated the potential of such structures in nanotechnology. The calcified scales of coccolithophores (coccoliths) have received less attention, but the large diversity of architectures make coccoliths attractive as parts for nano-devices. Currently coccolith calcite can be modified by the incorporation of metal ions or adsorption of enzymes to the surface, but genetic modification of coccolithophores may permit the production of coccoliths with customized architectures and surface properties...
August 16, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28822215/family-emergency-plan-and-preparedness-among-medical-practitioners-in-zaria-nigeria
#3
Jerry Godfrey Makama, Istifanus Anekoson Joshua, Elizabeth Jerry Makama
BACKGROUND: There has been an increase in the incidence of disasters in many parts of the world. Similarly, Nigeria has witnessed a recent increase of man-made disaster events such as plane crash, fire incidents, flood, and building collapse, including bomb blast orchestrated by terrorists that often create emergency situations. Therefore, the aim of the study was to evaluate family emergency plan and preparedness among medical practitioners in Zaria. METHODS: This was a cross-sectional descriptive study (May-July, 2013) of medical practitioners in Zaria, Nigeria...
January 2017: American Journal of Disaster Medicine
https://www.readbyqxmd.com/read/28822017/validation-of-a-non-contact-screening-device-for-the-combination-of-sleep-disordered-breathing-and-periodic-limb-movements-in-sleep
#4
Gerhard Weinreich, Sarah Terjung, Yi Wang, Stefanie Werther, Alberto Zaffaroni, Helmut Teschler
PURPOSE: Recent studies found that the non-contact screening device SleepMinder (ResMed Sensor Technologies, Dublin, Ireland) detects sleep-disordered breathing (SDB) with high diagnostic accuracy in cohorts suspected of this disorder. However, it was reported that in patients with periodic limb movement in sleep (PLMS), this non-contact device overestimates the apnea-hypopnea index (AHI). We aimed to overcome this limitation by introducing the novel sleep disorder index (SDI) which is sum of the AHI and the period limb movement index (PLMI)...
August 18, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28822008/label-free-sensing-and-classification-of-old-stored-blood
#5
Jun Hong Park, Taesik Go, Sang Joon Lee
Transfusion is crucial in surgical operation and anemia treatment. However, several hemorheological properties of blood are adversely altered during blood storage. After transfusion, these adverse alterations are related with decrease of oxygen and ion transport in blood circulation, which increase the mortality of transfused patients. Therefore, accurate sensing of whether a blood supply is still viable for transfusion or not is extremely important. In this study, a H-shaped microfluidic device and digital in-line holographic microscopy were employed to measure temporal variations of blood viscosity and the optical focusing property of erythrocytes during blood storage...
August 18, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28821963/myocardial-regenerative-therapy-using-a-scaffold-free-skeletal-muscle-derived-cell-sheet-in-patients-with-dilated-cardiomyopathy-even-under-a-left-ventricular-assist-device-a-safety-and-feasibility-study
#6
Yasushi Yoshikawa, Shigeru Miyagawa, Koichi Toda, Atsuhiro Saito, Yasushi Sakata, Yoshiki Sawa
BACKGROUND AND PURPOSE: Despite promising experimental results, clinically, intramyocardial myoblast injection failed to reverse remodeling and it induced arrhythmogenicity. In contrast, scaffold-free skeletal muscle-derived cell (SC) sheets attenuated cardiac dysfunction and arrhythmogenicity via paracrine effects. We report the first clinical trial of SC sheet implantation (SCSI) conducted in four patients with dilated cardiomyopathy (DCM) supported by a left ventricular assist device (LVAD)...
August 18, 2017: Surgery Today
https://www.readbyqxmd.com/read/28821929/magnetic-resonance-cinematography-of-the-fingers-a-3-0-tesla-feasibility-study-with-comparison-of-incremental-and-continuous-dynamic-protocols
#7
Thomas Bayer, Werner Adler, Rolf Janka, Michael Uder, Frank Roemer
OBJECTIVE: To study the feasibility of magnetic resonance cinematography of the fingers (MRCF) with comparison of image quality of different protocols for depicting the finger anatomy during motion. MATERIALS AND METHODS: MRCF was performed during a full flexion and extension movement in 14 healthy volunteers using a finger-gating device. Three real-time sequences (frame rates 17-59 images/min) and one proton density (PD) sequence (3 images/min) were acquired during incremental and continuous motion...
August 19, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28821928/is-lead-shielding-of-patients-necessary-during-fluoroscopic-procedures-a-study-based-on-kyphoplasty
#8
Joshua R Smith, Rebecca M Marsh, Michael S Silosky
OBJECTIVE: To determine the benefits, risks, and limitations associated with wrapping a patient with lead shielding during fluoroscopy-guided kyphoplasty procedures as a way to reduce operator radiation exposure. MATERIALS AND METHODS: An anthropomorphic phantom was used to mimic a patient undergoing a kyphoplasty procedure under fluoroscopic guidance. Radiation measurements of the air kerma rate (AKR) were made at several locations and under various experimental conditions...
August 18, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28821881/high-operating-temperature-in-v-based-superconducting-quantum-interference-proximity-transistors
#9
Nadia Ligato, Giampiero Marchegiani, Pauli Virtanen, Elia Strambini, Francesco Giazotto
Here we report the fabrication and characterization of fully superconducting quantum interference proximity transistors (SQUIPTs) based on the implementation of vanadium (V) in the superconducting loop. At low temperature, the devices show high flux-to-voltage (up to 0.52 mV/Φ0) and flux-to-current (above 12 nA/Φ0) transfer functions, with the best estimated flux sensitivity ~ 2.6 μΦ0/(Hz)(1/2) reached under fixed voltage bias, where Φ0 is the flux quantum. The interferometers operate up to T bath  [Formula: see text] 2 K, with an improvement of 70% of the maximal operating temperature with respect to early SQUIPTs design...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821862/water-soluble-epitaxial-nacl-thin-film-for-fabrication-of-flexible-devices
#10
Dong Kyu Lee, Sungjoo Kim, Sein Oh, Jae-Young Choi, Jong-Lam Lee, Hak Ki Yu
We studied growth mechanisms of water-soluble NaCl thin films on single crystal substrates. Epitaxial growth of NaCl(100) on Si(100) and domain-matched growth of NaCl(111) on c-sapphire were obtained at thicknesses below 100 nm even at room temperature from low lattice mismatches in both cases. NaCl thin film, which demonstrates high solubility selectivity for water, was successfully applied as a water-soluble sacrificial layer for fabrication of several functional materials, such as WO3 nano-helix and Sn doped In2O3 nano-branches...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821843/broadband-polarization-conversion-with-anisotropic-plasmonic-metasurfaces
#11
Wei Cao, Xiaodong Yang, Jie Gao
Metasurfaces offer exciting opportunities that enable precise control of light propagation, optical intensity, phase and polarization. Plasmonic metasurface based quarter-wave plates have been recently studied to realize the conversion between linear polarization and circular polarization. However, it is still quite challenging to directly measure the birefringent phase retardation introduced by metasurface wave plates with a reliable technique. Here, we report a high-performance broadband metasurface quarter-wave plate made of anisotropic T-shaped plasmonic antennas in near-infrared wavelength range, where the achromatic nearly 90° transmitted phase retardation through the metasurface is precisely characterized with an optical vortex based interferometric approach...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821823/highly-efficient-up-conversion-luminescence-in-er-3-yb-3-co-doped-na5lu9f32-single-crystals-by-vertical-bridgman-method
#12
Shinan He, Haiping Xia, Jianli Zhang, Yongsheng Zhu, Baojiu Chen
Er(3+)/Yb(3+) co-doped Na5Lu9F32 single crystals with different concentrations of Yb(3+) ions were prepared to investigate their phase structure, up-conversion (UC) properties and mechanism of UC luminescence by Bridgman method. Under 980 nm near-infrared (NIR) excitation, three sharp UC emission bands topping at green ~525 nm, ~548 nm and red ~669 nm were obtained in Er(3+)/Yb(3+) doped Na5Lu9F32 single crystals which are attributing to the transitions of (2)H11/2 → (4)I15/2, (4)S3/2 → (4)I15/2 and (4)F9/2 → (4)I15/2, respectively...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821803/hidden-peculiar-magnetic-anisotropy-at-the-interface-in-a-ferromagnetic-perovskite-oxide-heterostructure
#13
Le Duc Anh, Noboru Okamoto, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, Shinobu Ohya
Understanding and controlling the interfacial magnetic properties of ferromagnetic thin films are crucial for spintronic device applications. However, using conventional magnetometry, it is difficult to detect them separately from the bulk properties. Here, by utilizing tunneling anisotropic magnetoresistance in a single-barrier heterostructure composed of La0.6Sr0.4MnO3 (LSMO)/LaAlO3 (LAO)/Nb-doped SrTiO3 (001), we reveal the presence of a peculiar strong two-fold magnetic anisotropy (MA) along the [110]c direction at the LSMO/LAO interface, which is not observed in bulk LSMO...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821794/a-twice-electrochemical-etching-method-to-fabricate-superhydrophobic-superhydrophilic-patterns-for-biomimetic-fog-harvest
#14
Xiaolong Yang, Jinlong Song, Junkai Liu, Xin Liu, Zhuji Jin
Superhydrophobic-superhydrophilic patterned surfaces have attracted more and more attention due to their great potential applications in the fog harvest process. In this work, we developed a simple and universal electrochemical-etching method to fabricate the superhydrophobic-superhydrophilic patterned surface on metal superhydrophobic substrates. The anti-electrochemical corrosion property of superhydrophobic substrates and the dependence of electrochemical etching potential on the wettability of the fabricated dimples were investigated on Al samples...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821766/protein-composition-analysis-of-polyhedra-matrix-of-bombyx-mori-nucleopolyhedrovirus-bmnpv-showed-powerful-capacity-of-polyhedra-to-encapsulate-foreign-proteins
#15
Zhong-Jian Guo, Meng-Han Yu, Xian-Yun Dong, Wei-Li Wang, Ting Tian, Xian-Yin Yu, Xu-Dong Tang
Polyhedra can encapsulate other proteins and have potential applications as protein stabilizers. The extremely stable polyhedra matrix may provide a platform for future engineered micro-crystal devices. However, the protein composition of the polyhedra matrix remains largely unknown. In this study, the occlusion-derived virus (ODV)-removed BmNPV polyhedra matrix fraction was subjected to SDS-PAGE and then an LC-ESI-MS/MS analysis using a Thermo Scientific Q Exactive mass spectrometer. In total, 28 host and 91 viral proteins were identified...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821726/the-switching-of-strong-spin-wave-beams-in-patterned-garnet-films
#16
R Gieniusz, P Gruszecki, M Krawczyk, U Guzowska, A Stognij, A Maziewski
The application of spin waves in communication with information encoded in amplitude and phase could replace or enhance existing microelectronic and microwave devices with significantly decreased energy consumption. Spin waves (SW) are usually transported in a magnetic material shaped to act as a waveguide. However, the implementation of SW transport and switching in plane homogeneous magnetic films and running as a narrow beam with a small divergence angle still present a challenge. We propose a realization of a strong SW switchers based on a patterned yttrium iron garnet (YIG) film that could serve as a magnonic fundamental building block...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821718/high-energy-storage-density-over-a-broad-temperature-range-in-sodium-bismuth-titanate-based-lead-free-ceramics
#17
Haibo Yang, Fei Yan, Ying Lin, Tong Wang, Fen Wang
A series of (1-x)Bi0.48La0.02Na0.48Li0.02Ti0.98Zr0.02O3-xNa0.73Bi0.09NbO3 ((1-x)LLBNTZ-xNBN) (x = 0-0.14) ceramics were designed and fabricated using the conventional solid-state sintering method. The phase structure, microstructure, dielectric, ferroelectric and energy storage properties of the ceramics were systematically investigated. The results indicate that the addition of Na0.73Bi0.09NbO3 (NBN) could decrease the remnant polarization (P r ) and improve the temperature stability of dielectric constant obviously...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821628/frontline-adapt-therapy-to-treat-patients-with-symptomatic-m2-and-m3-occlusions-in-acute-ischemic-stroke-initial-experience-with-the-penumbra-ace-and-3max-reperfusion-system
#18
Jens Altenbernd, Oliver Kuhnt, Svenja Hennigs, Ruediger Hilker, Christian Loehr
BACKGROUND: After a series of positive studies for mechanical thrombectomy in large vessel occlusion acute ischemic stroke, the question remains, can symptomatic patients with distal vessel occlusion benefit from mechanical thrombectomy? PURPOSE: To assess the safety and efficacy of the 3MAX reperfusion system as frontline therapy for M2 and M3 occlusions. METHODS: This study retrospectively collected data on 58 patients treated for M2 and M3 occlusions between January and September 2016...
August 18, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28821626/current-applications-and-future-perspectives-of-robotics-in-cerebrovascular-and-endovascular-neurosurgery
#19
REVIEW
Simon A Menaker, Sumedh S Shah, Brian M Snelling, Samir Sur, Robert M Starke, Eric C Peterson
Advances in robotic medicine have been adopted by various surgical subspecialties as the benefits of this technology become more readily apparent: precision in narrow operative windows, tremor controlled movements, and modestly improved outcomes, among others. Vascular neurosurgery, in particular, remains open to newer and more cutting edge treatment options for complex pathologies, and robotics may be on the horizon for such advances. We seek to provide a broad overview of these innovations in vascular neurosurgery for both practitioners well acquainted with robotics and those seeking to become more familiar...
August 18, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28821474/validation-relaxation-a-quality-assurance-strategy-for-electronic-data-collection
#20
Avi Kenny, Nicholas Gordon, Thomas Griffiths, John D Kraemer, Mark J Siedner
BACKGROUND: The use of mobile devices for data collection in developing world settings is becoming increasingly common and may offer advantages in data collection quality and efficiency relative to paper-based methods. However, mobile data collection systems can hamper many standard quality assurance techniques due to the lack of a hardcopy backup of data. Consequently, mobile health data collection platforms have the potential to generate datasets that appear valid, but are susceptible to unidentified database design flaws, areas of miscomprehension by enumerators, and data recording errors...
August 18, 2017: Journal of Medical Internet Research
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