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Mohammad Z Zailaie
It is widely believed that the loss of the epidermal melanocytes in vitiligo is basically due to excessive oxidative stress. Previous research work described abnormal elevation of the absolute concentration of the epidermal hydrogen peroxide (H2O2) in lesional and non-lesional skin of vitiligo. Based on this finding, our primary research objective was to use this feature as a screening marker in individuals at a great risk of developing vitiligo. Ninety-six patients of non-segmental vitiligo (NSV) of varying durations, skin phototypes, and treatment modalities (psoralen UVA-, narrow band UVB-treated) were recruited for this study...
October 25, 2016: Archives of Dermatological Research
Mingshun Jiang, Yaozhang Sai, Xiangyi Geng, Qingmei Sui, Xiaohui Liu, Lei Jia
We proposed and studied an impact detection system based on a fiber Bragg grating (FBG) sensor array and multiple signal classification (MUSIC) algorithm to determine the location and the number of low velocity impacts on a carbon fiber-reinforced polymer (CFRP) plate. A FBG linear array, consisting of seven FBG sensors, was used for detecting the ultrasonic signals from impacts. The edge-filter method was employed for signal demodulation. Shannon wavelet transform was used to extract narrow band signals from the impacts...
October 24, 2016: Sensors
Hiroyuki Katsuki, Kenji Ohmori
We have experimentally performed the coherent control of delocalized ro-vibrational wave packets (RVWs) of solid para-hydrogen (p-H2) by the wave packet interferometry (WPI) combined with coherent anti-Stokes Raman scattering (CARS). RVWs of solid p-H2 are delocalized in the crystal, and the wave function with wave vector k ∼ 0 is selectively excited via the stimulated Raman process. We have excited the RVW twice by a pair of femtosecond laser pulses with delay controlled by a stabilized Michelson interferometer...
September 28, 2016: Journal of Chemical Physics
Shihao Dong, Jingsong Chen
Serrated polyposis syndrome (SPS) is closely associated with the initiation and development of colorectal cancer (CRC), however, there is few research on SPS in China. Serrated polyps can be divided into hyperplastic polyps, sessile serrated polyps and traditional serrated polyps. The diagnosis standard of SPS is as following: (1) There are at least 5 serrated lesions in proximal colon, and diameter of more than 2 lesions is >10 mm; (2) The patient has one serrated polyp with family history of SPS; (3) More than 20 serrated polyps can be found in the entire large bowel...
October 25, 2016: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
Ricardo Vega Monroy, Guillermo Salazar Cohen
In this work we present a theory, which is able to explain the non-monotonic decreasing behavior (observed in experimental data(1-11)) of the graphene terahertz conductivity with the increase of the field frequency. In this connection, the displacement of the structure of topological states inside the energy band gap, which appears in graphene due to the strong photon-electron coupling, and the narrowing of this gap, as result of electron transitions from bound photon-dressed electron states to extended states outside the energy gap driven by the field frequency, lead to a periodic change of singularities near the edge of the band gap, resulting in subtle quantum oscillations of the dynamical terahertz conductivity...
October 25, 2016: Nano Letters
M A Timirgazin, P A Igoshev, A K Arzhnikov, V Yu Irkhin
The ground-state magnetic phase diagram (including collinear and spiral states) of the single-band Hubbard model for the face-centered cubic lattice and related metal-insulator transition (MIT) are investigated within the slave-boson approach by Kotliar and Ruckenstein. The correlation-induced electron spectrum narrowing and a comparison with a generalized Hartree-Fock approximation allow one to estimate the strength of correlation effects. This, as well as the MIT scenario, depends dramatically on the ratio of the next-nearest and nearest electron hopping integrals [Formula: see text]...
October 25, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Jasper L A Vleugels, Joep E G IJspeert, Yark Hazewinkel, Manon van der Vlugt, Paul Fockens, Lianne Koens, Evelien Dekker
BACKGROUND: Optical diagnosis of diminutive (1 to 5 mm) polyps could result in a more cost-effective colonoscopy practice. Previous optical diagnosis studies did not incorporate the differentiation of sessile serrated polyps (SSPs). This study aimed to evaluate the impact of optical diagnosis of diminutive SSPs on the overall performance of endoscopic polyp differentiation in daily colonoscopy practice. METHODS: Endoscopy data were prospectively collected between 2011 and 2014 in a colonoscopy center...
October 21, 2016: Journal of Clinical Gastroenterology
Xiaoli Gao, Yan Song, Guixia Liu, Xiangting Dong, Jinxian Wang, Wensheng Yu
As a new class of non-rare-earth red phosphors for high-efficiency warm white light-emitting diodes (white LEDs), Mn(4+) ion activated fluoride compounds have been extensively investigated recently and hold the potential to supersede commercial rare earth doped nitride phosphors. Herein, a series of Mn(4+) ions doped BaTiF6 phosphors have been prepared via the hydrothermal route using citric acid as a surfactant. After a systematic investigation, we illustrate the effects of reaction time, nominal concentration of HF solution, and reaction temperature on the luminescence performance of the phosphor...
October 24, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Giancarlo Tirelli, Marco Piovesana, Annalisa Gatto, Lucio Torelli, Roberto Di Lenarda, Francesca Boscolo Nata
PURPOSE: Despite advances in the surgical management of head and neck squamous cell carcinoma, the identification of synchronous lesions, precancerous lesions around the main tumor, or the unknown primary in the case of neck metastasis remains a problem, as these lesions may be invisible to the naked eye or with standard white light (WL) endoscopy. However, the advent of tools such as narrow-band imaging (NBI) could help the clinician. The purpose of this study was to assess the impact of NBI during the pre-operative and intra-operative stages of management of oral and oropharyngeal cancers...
October 1, 2016: American Journal of Otolaryngology
Shoko Ono, Satoshi Abiko, Mototsugu Kato
Gastric intestinal metaplasia (GIM) is a high risk for intestinal type gastric cancer; however, there is a limitation for detection of GIM using white light imaging (WLI). Image-enhanced endoscopy (IEE) is more advantageous than WLI for optical diagnosis of GIM (1). Linked color imaging (LCI) (FUJIFILM Co., Tokyo, Japan) was newly developed for advanced IEE and enables visualization of red lesions that appear redder and whitish red lesions that appear whiter during routine endoscopy (2). GIM is observed as a lavender color that is distinguishable from the circumferential mucosa without GIM by using LCI (Figure 1)...
October 22, 2016: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
Yuhong Liu, Linlin Zhao, Jin Zhang, Jinzha Zhang, Wenbo Zhao, Chun Mao
The work investigates a new fluorescence resonance energy transfer (FRET) system using NaEuF4 nanoparticles (NPs) and Au@Ag2S NPs as the energy donor-acceptor pair for the first time. The NaEuF4/Au@Ag2S NPs-based FRET DNA sensor was constructed with NaEuF4 NPs as the fluorescence (FL) donor and Au@Ag2S core-shell NPs as FL acceptor. In order to find the matching energy acceptor, the amount of AgNO3 and Na2S were controlled in the synthesis process to overlap the absorption spectrum of energy acceptor with the emission spectrum of energy donors...
December 1, 2016: Talanta
Mieke T Bus, Daniel M De Bruin, Guido M Kamphuis, Patricia J Zondervan, Maria P Laguna Pes, Theo M De Reijke, Ton G Van Leeuwen, Jean J De LA Rosette
BACKGROUND: The applicability of urinary biomarkers and optical diagnostics in upper urinary tract carcinoma (UUTUC) are increasingly debated. To receive insight in the opinion of the urological community involved in this field, a survey was sent out to identify the most promising techniques and understand the need for new diagnostics. Primary objective of this study was to provide an overview of current diagnostics in upper urinary tract urothelial carcinoma. Secondary objectives of this study was to assess the need for additional diagnostic techniques in the current diagnostic work-up for UUT-UC and to assess knowledge of novel techniques...
October 21, 2016: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
Abel Santos, Cheryl Suwen Law, Dominique Wong Chin Lei, Taj Pereira, Dusan Losic
In this study, we present an advanced nanofabrication approach to produce gradient-index photonic crystal structures based on nanoporous anodic alumina. An apodization strategy is for the first time applied to a sinusoidal pulse anodisation process in order to engineer the photonic stop band of nanoporous anodic alumina (NAA) in depth. Four apodization functions are explored, including linear positive, linear negative, logarithmic positive and logarithmic negative, with the aim of finely tuning the characteristic photonic stop band of these photonic crystal structures...
October 21, 2016: Nanoscale
Qiang Wang, Qingjun Guo, Leping Wang, Bing Li
Highly crystalline and idiomorphic CoTiO3 single crystals with a well-defined polyhedral morphology were grown successfully for the first time by a facile flux method. Herein, the effects of the molten salt type and cobalt precursor on the phase composition, crystallization habit and morphology of the CoTiO3 products were also investigated. Importantly, using the flux-grown CoTiO3 crystal as the visible-light sensitizer due to its narrow band gap to couple with graphitic carbon nitride (g-C3N4) by a direct in situ thermal induced polycondensation route, novel CoTiO3/g-C3N4 composite photocatalysts were obtained...
October 21, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Folasade M Olajuyigbe, Cornelius O Fatokun
Functionality of enzymes within narrow pH range and temperature is a major challenge which limits their industrial applications, hence, there is need to search for thermostable pH-versatile enzymes. Here, a novel thermostable pH-versatile laccase from Sporothrix carnis CPF-05 was purified by ion-exchange and gel filtration chromatography. Single protein band on sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) confirmed homogeneity of the enzyme with molecular weight of 56kDa. Enzyme yield was 3...
October 17, 2016: International Journal of Biological Macromolecules
H Rostami-Ahmadvandi, D Kahrizi, K Cheghamirza, I Nosratti, J Zargooshi
Iran, especially its western provinces, is one of the most chickpea producing countries of the world with the yield about 500 kg/ ha in average. Narrow genetic variability for chickpea is one of the most limitations in conventional breeding approaches. In this study, derived genetic variation among 94 chickpea (Bivanij cultivar) mutant lines produced by Ethyl Methane Sulfonate (EMS) were assessed based on ISSR, RAPD markers in M4 and morpho-agronomic traits in M3 generation. The induced variation via EMS in field experiment, showed significant differences among mutant lines based on almost measured traits...
September 30, 2016: Cellular and Molecular Biology
Hagit Shoffel-Havakuk, Yonatan Lahav, Barak Meidan, Yaara Haimovich, Meir Warman, Moshe Hain, Yaniv Hamzany, Alexander Brodsky, Tali Landau-Zemer, Doron Halperin
OBJECTIVES/HYPOTHESIS: The primary suspicion for glottic malignancy during office laryngoendoscopy is based on lesion appearance. Previous studies investigating laryngeal use of narrow band imaging (NBI) are mostly descriptive. The additive value of NBI relative to white light (WL) requires further investigation. STUDY DESIGN: Observational matched study. METHODS: NBI was compared with WL images of 45 vocal fold lesions suspected for malignancy (21 carcinoma, 22 dysplasia, two benign)...
October 18, 2016: Laryngoscope
Anees A Ansari, Abdul K Parchur, Brijesh Kumar, S B Rai
The design of nanostructured materials with highly stable water-dispersion and luminescence efficiency is an important concern in nanotechnology and nanomedicine. In this paper, we described the synthesis and distinct surface modification on the morphological structure and optical (optical absorption, band gap energy, excitation, emission, decay time, etc.) properties of highly crystalline water-dispersible CaF2:Ce/Tb nanocrystals (core-nanocrystals). The epitaxial growth of inert CaF2 and silica shell, respectively, on their surface forming as CaF2:Ce/Tb@CaF2 (core/shell) and CaF2:Ce/Tb@CaF2@SiO2 (core/shell/SiO2) nanoarchitecture...
December 2016: Journal of Materials Science. Materials in Medicine
Simon Kahmann, Daniele Fazzi, Gebhard Josef Matt, Walter Thiel, Maria Antonietta Loi, Christoph J Brabec
We investigate the photoinduced absorption (PIA) spectra of the prototypical donor-acceptor polymers C/Si-PCPDTBT over a spectral range from 0.07 to 1.5 eV. Comparison between (TD)DFT simulations of the electronic and vibrational transitions of singlet- and triplet-excitons as well as polarons and bipolarons with the experimental results prove the observed features to be due to positive polarons delocalized on the polymer chains. We find the more crystalline Si-bridged variant to give rise to a red-shift in the transition energies, especially in the mid infrared (MIR) spectral range, and furthermore observe the pristine polymers' responses to depend on the excitation energy...
October 17, 2016: Journal of Physical Chemistry Letters
John Vinson, Terrence Jach, Matthias Müller, Rainer Unterumsberger, Burkhard Beckhoff
It has been previously shown that two effects cause dramatic changes in the x-ray absorption and emission spectra from the N K edge of the insulating crystal ammonium nitrate. First, vibrational disorder causes major changes in the absorption spectrum, originating not only from the thermal population of phonons, but, significantly, from zero-point motion as well. Second, the anomalously large broadening (~ 4 eV) of the emission originating from nitrate σ states is due to unusually short lifetimes of quasiparticles in an otherwise extremely narrow band...
July 15, 2016: Physical Review. B
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