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https://www.readbyqxmd.com/read/28106371/enhancement-of-electrode-stability-using-platinum-cobalt-nanocrystals-on-a-novel-composite-sictic-support
#1
María Millán, Hector Zamora, Manuel Andrés Rodrigo, Justo Lobato
PtCo alloy catalysts for high temperature PEMFCs (Protonic Exchange Membrane Fuel Cells) were synthesized on a novel non-carbonaceous support (SiCTiC) using the impregnation method with NaBH4 as the reducing agent at different synthesis temperatures to evaluate the effect of this variable on their physicochemical and electrochemical properties. The catalysts were characterized by inductively coupled plasma optical emission spectrometry (ICP-OES), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), X-ray diffraction (XRD), transmission electron microscope-energy dispersive X-ray (TEM) and temperature programmed reduction (TPR)...
January 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28102678/a-self-assembled-cofacial-cobalt-porphyrin-prism-for-oxygen-reduction-catalysis
#2
Amanda N Oldacre, Alan E Friedman, Timothy R Cook
Herein we report the first study of the oxygen reduction reaction (ORR) catalyzed by a cofacial porphyrin scaffold accessed in high yield (overall 53%) using coordination-driven self-assembly with no chromatographic purification steps. The ORR activity was investigated using chemical and electrochemical techniques on monomeric cobalt(II) tetra(meso-4-pyridyl)porphyrinate (CoTPyP) and its cofacial analogue [Ru8(η(6)-iPrC6H4Me)8(dhbq)4(CoTPyP)2][OTf]8 (Co Prism) (dhbq = 2,5-dihydroxy-1,4-benzoquinato, OTf = triflate) as homogeneous oxygen reduction catalysts...
January 19, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28096977/high-rates-of-multidrug-resistance-among-uropathogenic-escherichia-coli-in-children-and-analyses-of-esbl-producers-from-nepal
#3
Narayan Prasad Parajuli, Pooja Maharjan, Hridaya Parajuli, Govardhan Joshi, Deliya Paudel, Sujan Sayami, Puspa Raj Khanal
BACKGROUND: Emergence of Extended-spectrum beta-lactamase producing Escherichia coli causing urinary tract infections (UTI) among pediatric patients is an increasing problem worldwide. However, very little is known about pediatric urinary tract infections and antimicrobial resistance trend from Nepal. This study was conducted to assess the current antibiotic resistance rate and ESBL production among uropathogenic Escherichia coli in pediatric patients of a tertiary care teaching hospital of Nepal...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28096690/the-relationship-between-findings-on-magnetic-resonance-imaging-and-previous-history-of-low-back-pain
#4
Juichi Tonosu, Hiroyuki Oka, Ko Matsudaira, Akiro Higashikawa, Hiroshi Okazaki, Sakae Tanaka
The objective of this study was to evaluate the relationship between magnetic resonance imaging (MRI) findings and previous low back pain (LBP) in participants without current LBP. Current LBP was defined as LBP during the past month. Previous LBP was defined as a history of medical consultation for LBP. Ninety-one participants without current LBP were included. Sagittal T2-weighted MRI was used to assess the intervertebral space from T12/L1 to L5/S1. These images were classified into five grades based on the Pfirrmann grading system...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28095794/development-of-an-algorithm-for-phenotypic-screening-of-carbapenemase-producing-enterobacteriaceae-in-the-routine-laboratory
#5
Jérôme Robert, Alix Pantel, Audrey Merens, Elodie Meiller, Jean-Philippe Lavigne, Marie-Hélène Nicolas-Chanoine
BACKGROUND: Carbapenemase-producing Enterobacteriaceae (CPE) are difficult to identify among carbapenem non-susceptible Enterobacteriaceae (NSE). We designed phenotypic strategies giving priority to high sensitivity for screening putative CPE before further testing. METHODS: Presence of carbapenemase-encoding genes in ertapenem NSE (MIC > 0.5 mg/l) consecutively isolated in 80 French laboratories between November 2011 and April 2012 was determined by the Check-MDR-CT103 array method...
January 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28091877/influence-of-enamel-dentin-thickness-on-the-toxic-and-esthetic-effects-of-experimental-in-office-bleaching-protocols
#6
C C de Oliveira Duque, D G Soares, F G Basso, J Hebling, C A de Souza Costa
OBJECTIVES: This paper aims to assess the whitening effectiveness and toxicity of tooth-bleaching protocols applied to enamel/dentin disks simulating mandibular incisors (ICs) and premolars (PMs). MATERIALS AND METHODS: A 10% hydrogen peroxide (H2O2) gel was applied for 3 × 15, 1 × 15, or 1 × 5 min to enamel/dentin disks simulating mandibular ICs and PMs, and the trans-enamel and trans-dentinal diffusion products were applied to human dental pulp cells (1 h)...
January 14, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28089837/direct-midline-posterior-corpectomy-and-fusion-of-a-lumbar-burst-fracture-with-retrospondyloptosis-a-case-report
#7
Arthur Carminucci, Rachid Assina, R Nick Hernandez, Ira M Goldstein
BACKGROUND: Traumatic burst fractures of the lumbar spine can result in significant neurological injury and mechanical instability. The ideal surgical approach for the treatment of unstable lumbar spine burst fractures remains debatable. CASE DESCRIPTION: A 37 year-old male presented with severe neurological injury including loss of motor function below the level of the iliopsoas muscles bilaterally, saddle anesthesia, and absent rectal tone, following a fall from 60 ft...
January 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28074781/mechanically-tunable-sub-10-nm-metal-gap-by-stretching-pdms-substrate
#8
Wenjie Liu, Yang Shen, Guohui Xiao, Xiaoyi She, Jianfang Wang, Chongjun Jin
Manipulating light in sub-10 nm or subnanometer metal nanogaps is crucial to study the strong interaction between electromagnetic waves and matters. However, the fabrication of metallic nanogaps with precisely controlled size and high-throughput still remains a challenge. Here, we developed an approach to actively control the gap distance between adjacent metal nanoparticles from 140 nm to sub-10 nm or even 0 nm via mechanical stretching process. To demonstrate this method, we manufactured the gold disk arrays in a square lattice on the polydimethylsiloxane (PDMS) substrate through interference lithography and gold deposition, and sub-10 nm interparticle gap was achieved as exerting a strain of 100% to the PDMS substrate...
January 11, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28074125/shiga-vero-toxin-producing-escherichia-coli-isolated-from-the-hospital-foods-virulence-factors-o-serogroups-and-antimicrobial-resistance-properties
#9
Reza Ranjbar, Mojtaba Masoudimanesh, Farhad Safarpoor Dehkordi, Nematollah Jonaidi-Jafari, Ebrahim Rahimi
BACKGROUND: According to the presence of the weak, diabetic and immunosuppressive patients in hospitals, hospital foods should have a high quality and safety. Cooking a lot of foods higher than daily requirement, storage of cooked foods in an inappropriate condition and presence of nurses and servants in distribution of food to patients are the main reasons caused contamination of hospital foods. Shiga toxigenic Escherichia coli is one of the common cause of food poisoning in hospitals...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28072493/patterns-of-infections-aetiological-agents-and-antimicrobial-resistance-at-a-tertiary-care-hospital-in-northern-tanzania
#10
Happiness Houka Kumburu, Tolbert Sonda, Blandina Theophil Mmbaga, Michael Alifrangis, Ole Lund, Gibson Kibiki, Frank M Aarestrup
OBJECTIVE: To determine the causative agents of infections and their antimicrobial susceptibility at a tertiary care hospital in Moshi, Tanzania, to guide optimal treatment. METHODS: A total of 590 specimens (stool (56), sputum (122), blood (126) and wound swabs (286)) were collected from 575 patients admitted in the medical and surgical departments. The bacterial species were determined by conventional methods and disk diffusion was used to determine the antimicrobial susceptibility pattern of the bacteria isolates...
January 10, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28065306/measuring-abscission-spatiotemporal-dynamics-using-quantitative-high-resolution-microscopy
#11
O Gershony, S Sherman, S Adar, I Segal, D Nachmias, I Goliand, N Elia
The spatiotemporal characteristics of ESCRT (Endosomal Sorting Complex Required for Transport)-mediated mammalian cytokinetic abscission have been studied in recent years using quantitative high-resolution light microscopy techniques. Here we describe how to apply spinning disk live cell imaging and structured illumination microscopy (SIM) to define the dynamics and structural organization of abscission and of proteins involved in abscission in a quantitative manner. We further provide a protocol to correlate the structural data, obtained by SIM, to the dynamic information obtained by live cell recordings...
2017: Methods in Cell Biology
https://www.readbyqxmd.com/read/28059296/plasmon-hybridization-in-split-ring-nanosandwich-for-refractive-index-sensing-numerical-investigation
#12
Sara M Kandil, Islam A Eshrah, Inas S El Babli, Ashraf H Badawi
In this paper, a numerical investigation of a new nanosandwich structure suitable for use in refractive index sensing is presented. The split ring nanosandwich consists of a stack of two gold split rings separated by a SiO<sub>2 </sub>disk spacer where the gaps in the upper and lower split rings are in perpendicular axes. The optical properties of the structure are described using the plasmon hybridization picture. This structure shows a high tunability of the optical response due to its strong hybridized modes...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28056831/nasal-carriage-of-methicillin-resistant-staphylococcus-aureus-among-health-care-workers-at-al-shifa-hospital-in-gaza-strip
#13
Nabil Abdullah El Aila, Nahed Ali Al Laham, Basim Mohammad Ayesh
BACKGROUND: Nasal carriage of Staphylococcus aureus among hospital personnel is a common cause of hospital acquired infections. Emergence of drug resistant strains especially methicillin resistant S. aureus (MRSA) is a serious problem in hospital environment. Therefore, the aim of this study was to determine the nasal carriage rate of S. aureus and MRSA among Health Care Workers (HCWs) at Al Shifa Hospital, the major hospital in Gaza Strip. METHODS: A cross sectional study was conducted on 200 HCWs...
January 5, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28056445/stabilizer-free-silver-nanoparticles-as-efficient-catalysts-for-electrochemical-reduction-of-oxygen
#14
Alexey Treshchalov, Heiki Erikson, Laurits Puust, Sergey Tsarenko, Rando Saar, Alexander Vanetsev, Kaido Tammeveski, Ilmo Sildos
In this work we demonstrated the potential of the He+5% H2+1% N2 plasma jet treatment for the synthesis of surfactant-free silver nanoparticles (Ag NPs) with narrow size distribution. The obtained colloidal solutions of electrostatically stabilized Ag NPs do not show any agglomeration for several months. Apart from an atomic thin oxide layer and the relatively weakly bound OH(-) ions, the surface of Ag NPs can be considered as stabilizer-free. The surface charge (characterized by the zeta potential) of Ag NPs in solution was measured by electrophoretic light scattering technique...
December 24, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28056219/antimicrobial-resistant-escherichia-coli-and-enterococcus-spp-isolated-from-miranda-donkey-equus-asinus-an-old-problem-from-a-new-source-with-a-different-approach
#15
Isabel Carvalho, Rosa Del Campo, Margarida Sousa, Nuno Silva, João Carrola, Catarina Marinho, Tiago Santos, Silvia Carvalho, Miguel Nóvoa, Miguel Quaresma, José Eduardo Pereira, Marta Cobo, Gilberto Igrejas, Patricia Poeta
The Miranda Donkey (Equus asinus) is an endangered asinine from Miranda do Douro region, located in North East of Portugal. We study the antimicrobial resistance (AMR) and virulence genes in Escherichia coli and Enterococcus spp. isolates from these animals. In March 2014, a total of 66 faecal samples were recovered from independent animals. Antibiotic resistance was determined by the disk diffusion method. Carriage of genes codifying for antibiotic resistant and virulent factors was analyzed by polymerase chain reaction (PCR)...
January 5, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28054781/reversible-vesicle-to-disk-transitions-of-liposomes-induced-by-the-self-assembly-of-water-soluble-porphyrins
#16
Kouta Sugikawa, Yutaro Takamatsu, Kazuma Yasuhara, Masafumi Ueda, Atsushi Ikeda
Structural control of lipid membranes is important for mechanisms underlying biological functions and for creating high-functionality soft materials. We demonstrate the reversible control of vesicle structures (liposomes) using supramolecular assemblies. Specifically, water-soluble anionic porphyrin molecules interact with positively charged lipid membrane surfaces to form one-dimensional self-assembled structures (J-aggregates) under acidic conditions. Cryogenic transmission electron microscopy revealed that porphyrin J-aggregates on the membrane surface induced an extensive structural change from vesicles to layered disks...
January 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28050537/spinopelvic-balance-evaluation-of-patients-with-degenerative-spondylolisthesis-l4l5-and-l4l5-herniated-disc-who-underwent-surgery
#17
Viviane Regina Hernandez Nunes, Charbel Jacob, Igor Machado Cardoso, José Lucas Batista, Marcus Alexandre Novo Brazolino, Thiago Cardoso Maia
OBJECTIVE: To correlate spinopelvic balance with the development of degenerative spondylolisthesis and disk herniation. METHODS: This was a descriptive retrospective study that evaluated 60 patients in this hospital, 30 patients with degenerative spondylolisthesis at the L4-L5 level and 30 with herniated disk at the L4-L5 level, all of whom underwent Surgical treatment. RESULTS: Patients with lumbar disk herniation at L4-L5 level had a mean tilt of 8...
November 2016: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28050321/comparison-of-anterior-segment-measurements-obtained-by-aladdin-optical-biometer-and-sirius-corneal-topography
#18
Onur Polat, Zeki Baysal, Serkan Özcan, Sibel İnan, Ümit Übeyt İnan
OBJECTIVES: To assess the agreement of anterior segment parameter measurements derived from Aladdin optical biometer using optical low coherence interferometer and Sirius corneal topography using combined Scheimpflug-Placido disk. MATERIALS AND METHODS: Data obtained using the Aladdin and Sirius systems from 110 eyes of 59 subjects who had no health problems other than refractive errors were retrospectively evaluated. Anterior chamber depth (ACD), flat (K1) and steep (K2) keratometry readings, and white-to-white distance (WTW) measurements taken with both devices were noted...
December 2016: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28048082/su-f-i-62-a-dcm4chee-log-analyzer-for-monitoring-dicom-network-performance
#19
M Moriyama, Y Murakami, M Ohki, K Tokumori, S Okamoto
PURPOSE: The dcm4chee is an open source software for making a high-performance DICOM server. The process of dcm4chee is recorded in a log as text file. It takes a lot of time to read the log file for checking DICOM server performance. Therefore, we made a log analyzer for dcm4chee, which compiles the statistics on image transfer between DICOM server and imaging devices. METHODS: The log analysis program was written in Perl (practical extraction and report language)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047428/su-f-t-48-clinical-implementation-of-brachytherapy-planning-system-for-coms-eye-plaques
#20
C Ferreira, M Islam, S Ahmad, T De La Fuente Herman
PURPOSE: To commission the Brachytherapy Planning (BP) system (Varian, Palo Alto, CA) for the Collaborative Ocular Melanoma Study (COMS) eye plaques by evaluating dose differences against original plans from Nucletron Planning System (NPS). METHODS: NPS system is the primary planning software for COMS-plaques at our facility; however, Brachytherapy Planning 11.0.47 (Varian Medical Systems) is used for secondary check and for seed placement configurations not originally commissioned...
June 2016: Medical Physics
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