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https://www.readbyqxmd.com/read/28317370/two-dimensional-ch3nh3pbi3-perovskite-nanosheets-for-ultrafast-pulsed-fiber-lasers
#1
Pengfei Li, Yao Chen, Tieshan Yang, Ziyu Wang, Han Lin, Yanhua Xu, Lei Li, Haoran Mu, Bannur Nanjunda Shivananju, Yupeng Zhang, Qinglin Zhang, Anlian Pan, Shaojuan Li, Ding Yuan Tang, Baohua Jia, Han Zhang, Qiaoliang Bao
Even though the nonlinear optical effects of solution processed organic-inorganic perovskite films have been studied, the nonlinear optical properties in two-dimensional (2D) perovskites especially their applications for ultrafast photonics are largely unexplored. In comparison to bulk perovskite films, 2D perovskite nanosheets with small thickness of a few unit cells are more suitable for investigating the intrinsic nonlinear optical properties because bulk recombination of photo-carriers and the nonlinear scattering are relatively small...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28297055/any-use-for-alternative-lock-solutions-in-the-prevention-of-catheter-related-blood-stream-infections
#2
Laura Labriola, Jean-Michel Pochet
The prevention of catheter-related blood stream infections (CRBSI) in hemodialysis (HD) patients remains a challenge because of high morbidity and mortality associated to CRBSI. Alternative locking solutions (ALS) containing an antithrombotic substance with additional antimicrobial or antibiofilm properties (citrate, ethylenediaminetetraacetic acid [EDTA], 70% ethanol, thrombolytics) with or without the addition of molecules with specific antimicrobial activity (antibiotics, taurolidine, paraben-methylene-blue) has been proposed with the aim to prevent or eradicate intraluminal biofilm colonization and subsequent CRBSI...
March 6, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28292637/patterns-and-predictors-of-peripherally-inserted-central-catheter-occlusion-the-3p-o-study
#3
Shawna N Smith, Nancy Moureau, Valerie M Vaughn, Tanya Boldenow, Scott Kaatz, Paul J Grant, Steven J Bernstein, Scott A Flanders, Vineet Chopra
PURPOSE: To evaluate patterns and predictors of peripherally inserted central catheter (PICC)-related occlusion. MATERIALS AND METHODS: Data from a multihospital study were used to examine factors associated with PICC occlusion. Occlusion was defined if documented in the medical record or when tissue plasminogen activator was administered for occlusion-related concerns. Mixed-effects logistic regression was used to predict occlusion, controlling for patient-, provider-, device-, and hospital-level characteristics...
March 11, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28287523/use-of-sacrificial-nanoparticles-to-remove-the-effects-of-shot-noise-in-contact-holes-fabricated-by-e-beam-lithography
#4
Shankar B Rananavare, Moshood K Morakinyo
Nano-patterns fabricated with extreme ultraviolet (EUV) or electron-beam (E-beam) lithography exhibit unexpected variations in size. This variation has been attributed to statistical fluctuations in the number of photons/electrons arriving at a given nano-region arising from shot-noise (SN). The SN varies inversely to the square root of a number of photons/electrons. For a fixed dosage, the SN is larger in EUV and E-beam lithographies than for traditional (193 nm) optical lithography. Bottom-up and top-down patterning approaches are combined to minimize the effects of shot noise in nano-hole patterning...
February 12, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28271002/coherence-properties-of-short-cavity-swept-lasers
#5
Bart Johnson, Walid Atia, Mark Kuznetsov, Brian D Goldberg, Peter Whitney, Dale C Flanders
It has been shown theoretically and experimentally that short cavity swept lasers are passively mode locked. We develop a mathematical model of these lasers and the light field solutions are used to predict the coherence length and coherence revival behavior. The calculations compare favorably with data from a 990-1100 nm laser swept at 100 kHz suitable for optical coherence tomography applications.
February 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28268487/optimal-weighted-averaging-of-event-related-activity-from-acquisitions-with-artifacts
#6
Luca Vollero, Sara Petrichella, Giulio Innello
In several biomedical applications that require the signal processing of biological data, the starting procedure for noise reduction is the ensemble averaging of multiple repeated acquisitions (trials). This method is based on the assumption that each trial is composed of two additive components: (i) a time-locked activity related to some sensitive/stimulation phenomenon (ERA, Event Related Activity in the following) and (ii) a sum of several other non time-locked background activities. The averaging aims at estimating the ERA activity under very low Signal to Noise and Interference Ratio (SNIR)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28254401/liquor-legislation-last-drinks-and-lockouts-the-newcastle-australia-solution
#7
G R Hoffman, K Palazzi, B K Oteng Boateng, C Oldmeadow
The aim of this study was to determine whether the regional implementation of prohibitive liquor legislation, introduced in order to limit the sale of and access to alcohol, can lead to a sustained reduction in the incidence of assault occasioning facial injury, as seen in patients presenting to a level 1 trauma hospital. A retrospective observational cohort study was conducted to document patients who were identified as an acute hospital presentation of assault occasioning facial injury. The period of study was 2003-2015; this ensured a similar period of time before and after the implementation of the legislation in 2008...
February 18, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28243767/practical-considerations-for-investigation-of-protein-conformational-dynamics-by-15-n-r-1%C3%AF-relaxation-dispersion
#8
Erik Walinda, Daichi Morimoto, Masahiro Shirakawa, Kenji Sugase
It is becoming increasingly apparent that proteins are not static entities and that their function often critically depends on accurate sampling of multiple conformational states in aqueous solution. Accordingly, the development of methods to study conformational states in proteins beyond their ground-state structure ("excited states") has crucial biophysical importance. Here we investigate experimental schemes for optimally probing chemical exchange processes in proteins on the micro- to millisecond timescale by (15)N R 1ρ relaxation dispersion...
February 28, 2017: Journal of Biomolecular NMR
https://www.readbyqxmd.com/read/28241410/inertial-navigation-system-doppler-velocity-log-ins-dvl-fusion-with-partial-dvl-measurements
#9
Asaf Tal, Itzik Klein, Reuven Katz
The Technion autonomous underwater vehicle (TAUV) is an ongoing project aiming to develop and produce a small AUV to carry on research missions, including payload dropping, and to demonstrate acoustic communication. Its navigation system is based on an inertial navigation system (INS) aided by a Doppler velocity log (DVL), magnetometer, and pressure sensor (PS). In many INSs, such as the one used in TAUV, only the velocity vector (provided by the DVL) can be used for aiding the INS, i.e., enabling only a loosely coupled integration approach...
February 22, 2017: Sensors
https://www.readbyqxmd.com/read/28237334/functional-involvement-of-protein-kinase-c-rho-kinase-and-trpc3-decreases-while-plc-increases-with-advancement-of-pregnancy-in-mediating-oxytocin-induced-myometrial-contractions-in-water-buffaloes-bubalus-bubalis
#10
Abhishek Sharma, Udayraj P Nakade, Soumen Choudhury, Satish Kumar Garg
Present study unravels the involvement of different calcium signaling pathways in oxytocin-induced contractions in myometrium of non-pregnant and pregnant buffaloes during early and mid-pregnancy stages. Uteri of pregnant animals were more sensitive than of non-pregnant buffaloes. Phasic contractions and frequency of contraction significantly increased with advancement of pregnancy, while tonic contractions non-significantly and amplitude significantly decreased from six months pregnancy onward. Oxytocin produced concentration-dependent-contraction on isolated myometrial strips of pregnant and non-pregnant buffaloes and the dose response curves (DRCs) of oxytocin were significantly (P < 0...
April 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28226661/optimal-weighted-averaging-of-event-related-activity-from-acquisitions-with-artifacts
#11
Luca Vollero, Sara Petrichella, Giulio Innello, Luca Vollero, Sara Petrichella, Giulio Innello, Luca Vollero, Sara Petrichella, Giulio Innello
In several biomedical applications that require the signal processing of biological data, the starting procedure for noise reduction is the ensemble averaging of multiple repeated acquisitions (trials). This method is based on the assumption that each trial is composed of two additive components: (i) a time-locked activity related to some sensitive/stimulation phenomenon (ERA, Event Related Activity in the following) and (ii) a sum of several other non time-locked background activities. The averaging aims at estimating the ERA activity under very low Signal to Noise and Interference Ratio (SNIR)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28203008/-effects-of-different-techniques-on-removal-of-vapor-lock-in-the-apical-region-of-curved-canals-a-cone-beam-computed-tomography-study
#12
Z Su, Y H Bai, X M Hou
OBJECTIVE: To compare the effect of four different techniques on removal of vapor lock in the apical region of curved root canals. METHODS: Forty simulated resin root canals with 45° curvature were prepared using WaveOne Primary, then the apical foramen were sealed with soft wax. The teeth were divided randomly into 4 groups thereafter (n=10). Contract solution was injected into the canals using a 30 G side-vented needle and scanned with cone-beam CT (CBCT) to identify the volume of the vapor lock...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28183606/one-step-synthesis-self-assembly-and-bioimaging-applications-of-adenosine-triphosphate-containing-amphiphilies-with-aggregation-induced-emission-feature
#13
Zi Long, Meiying Liu, Liucheng Mao, Guangjian Zeng, Qiang Huang, Hongye Huang, Fengjie Deng, Yiqun Wan, Xiaoyong Zhang, Yen Wei
Amphiphilic molecules with aggregation-induced emission (AIE) characteristics have attracted intensive interest for biological imaging applications for their self-assembly into nanostructures and obvious enhanced fluorescence intensity in aqueous solution. Although many AIE-active fluorescent organic nanoparticles (FONs) have been fabricated recently, the direct linkage of hydrophilic small molecules and hydrophobic AIE dyes has rarely been reported. In this work, we reported a one-pot strategy for preparation of adenosine triphosphate (ATP) containing molecules that conjugated the amino group of ATP and aldehyde-terminated AIE dye (PhCHO) based on mercaptoacetic acid locking imine (MALI) reaction...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28170269/nanomechanical-characterization-of-micellar-surfactant-films-via-atomic-force-microscopy-at-a-graphite-surface
#14
Benjamin L Micklavzina, Shengwei Zhang, Hao He, Marjorie L Longo
In this work, we study the mechanical properties of sodium dodecyl sulfate (SDS) and dodecylamine hydrochloride (DAH) micellar films at a graphite surface via atomic force microscopy (AFM). Breakthrough forces for these films were measured using silicon nitride cantilevers and were found to be 1.1 ± 0.1 nN for a 10 mM DAH film and 3.0 ± 0.3 nN for a 10 mM SDS film. For 10 mM SDS films, it was found that the addition of 1.5 mM of NaCl, Na2SO4, or MgCl2 produced a 50-70% increase in the measured breakthrough force...
February 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28147611/resonant-mode-characterisation-of-a-cylindrical-helmholtz-cavity-excited-by-a-shear-layer
#15
Gareth J Bennett, David B Stephens, Francisco Rodriguez Verdugo
This paper investigates the interaction between the shear-layer over a circular cavity with a relatively small opening and the flow-excited acoustic response of the volume within to shear-layer instability modes. Within the fluid-resonant category of cavity oscillation, most research has been conducted on rectangular geometries: generally restricted to longitudinal standing waves, or when cylindrical: to Helmholtz resonance. In practical situations, however, where the cavity is subject to a range of flow speeds, many different resonant mode types may be excited...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28128340/ultrafast-nonlinear-optical-properties-of-thin-solid-dna-film-and-their-application-as-a-saturable-absorber-in-femtosecond-mode-locked-fiber-laser
#16
Reza Khazaeinezhad, Sahar Hosseinzadeh Kassani, Bjorn Paulson, Hwanseong Jeong, Jiyoon Gwak, Fabian Rotermund, Dong-Il Yeom, Kyunghwan Oh
A new extraordinary application of deoxyribonucleic acid (DNA) thin-solid-film was experimentally explored in the field of ultrafast nonlinear photonics. Optical transmission was investigated in both linear and nonlinear regimes for two types of DNA thin-solid-films made from DNA in aqueous solution and DNA-cetyltrimethylammonium chloride (CTMA) in an organic solvent. Z-scan measurements revealed a high third-order nonlinearity with n2 exceeding 10(-9) at a wavelength of 1570 nm, for a nonlinarity about five orders of magnitude larger than that of silica...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28112099/performance-of-an-insect-inspired-target-tracker-in-natural-conditions
#17
Zahra M Bagheri, Steven D Wiederman, Benjamin S Cazzolato, Steven Grainger, David C O'Carroll
Robust and efficient target-tracking algorithms embedded on moving platforms, are a requirement for many computer vision and robotic applications. However, deployment of a real-time system is challenging, even with the computational power of modern hardware. As inspiration, we look to biological lightweight solutions-lightweight and low-powered flying insects. For example, dragonflies pursue prey and mates within cluttered, natural environments, deftly selecting their target amidst swarms. In our laboratory, we study the physiology and morphology of dragonfly 'small target motion detector' neurons likely to underlie this pursuit behaviour...
February 16, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28078825/ethanol-combined-with-heparin-as-a-locking-solution-for-the-prevention-of-catheter-related-blood-stream-infections-in-hemodialysis-patients-a-prospective-randomized-study
#18
Sofia Sofroniadou, Ioanna Revela, Alexandros Kouloubinis, Ioanna Makriniotou, Sinodi Zerbala, Despina Smirloglou, Petros Kalocheretis, Apostolos Drouzas, George Samonis, Christos Iatrou
Introduction Ethanol lock solution has been mainly administered in paediatric and home parenteral nutrition patients in order to prevent catheter related blood stream infections (CRBSI). Its utility in hemodialysis (HD) patients with non-tunneled-uncuffed catheter (NTC) has been poorly explored. Methods We conducted a prospective randomized study in chronic HD patients requiring a newly inserted NTC-while awaiting for the maturation of an already established arteriovenous fistula (AVF) or arteriovenous graft (AVG) or tunneled-cuffed catheter insertion...
January 11, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28074948/hot-electron-driven-photocatalytic-water-splitting
#19
Bingya Hou, Lang Shen, Haotian Shi, Rehan Kapadia, Stephen B Cronin
We report measurements of photocatalytic water splitting using Au films with and without TiO2 coatings. In these structures, a thin (3-10 nm) film of TiO2 is deposited using atomic layer deposition (ALD) on top of a 100 nm thick Au film. We utilize an AC lock-in technique, which enables us to detect the relatively small photocurrents (∼μA) produced by the short-lived hot electrons that are photoexcited in the metal. Under illumination, the bare Au film produces a small AC photocurrent (<1 μA) for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) due to hot electrons and hot holes, respectively, that are photoexcited in the Au film...
January 11, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28035620/does-antimicrobial-lock-solution-reduce-catheter-related-infections-in-hemodialysis-patients-with-central-venous-catheters-a-bayesian-network-meta-analysis
#20
Jun Zhang, Bo Wang, Rongke Li, Long Ge, Kee-Hsin Chen, Jinhui Tian
PURPOSE: The purpose of our study is to carry out a Bayesian network meta-analysis comparing the efficacy of different antimicrobial lock solutions (ALS) for prevention of catheter-related infections (CRI) in patients with hemodialysis (HD) and ranking these ALS for practical consideration. METHODS: We searched six electronic databases, earlier relevant meta-analysis and reference lists of included studies for randomized controlled trials (RCTs) that compared ALS for preventing episodes of CRI in patients with HD either head-to-head or against control interventions using non-ALS...
April 2017: International Urology and Nephrology
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