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https://www.readbyqxmd.com/read/29160880/low-temperature-growth-of-gallium-oxide-thin-films-via-plasma-enhanced-atomic-layer-deposition
#1
Richard O'Donoghue, Julian Rechmann, Morteza Aghaee, Detlef Rogalla, Hans-Werner Becker, Mariadriana Creatore, Andreas Dirk Wieck, Anjana Devi
Herein we describe an efficient low temperature (60-160 °C) plasma enhanced atomic layer deposition (PEALD) process for gallium oxide (Ga2O3) thin films using hexakis(dimethylamido)digallium [Ga(NMe2)3]2 with oxygen (O2) plasma on Si(100). The use of O2 plasma was found to have a significant improvement on the growth rate and deposition temperature when compared to former Ga2O3 processes. The process yielded the second highest growth rates (1.5 Å per cycle) in terms of Ga2O3 ALD and the lowest temperature to date for the ALD growth of Ga2O3 and typical ALD characteristics were determined...
November 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29160761/fronto-parietal-coherence-response-to-tdcs-modulation-in-patients-with-disorders-of-consciousness
#2
Yang Bai, Xiaoyu Xia, Yong Wang, Yongkun Guo, Yi Yang, Jianghong He, Xiaoli Li
A transcranial direct current stimulation (tDCS) protocol (2 min, 2 mA, anodal electrode at the left dorsolateral prefrontal cortex and cathodal electrode at the right supraorbital area) was applied in patients with different degrees of disorders of consciousness (DoC). Although previous research indicates that it could improve patients' coma recovery scale-revised (CRS-R) scores, the brain's electrophysiological responses to tDCS are still unclear. Therefore, the present study was performed to explore the underlying brain responses of patients in a minimally conscious state (MCS) and a Unresponsive Wakefulness Syndrome (UWS) to tDCS modulation...
November 21, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29159677/not-all-sagittal-band-tears-come-with-extensor-instability-a-case-report-with-radiological-and-operative-correlation
#3
Shuo Li, Jeffrey J Brooks, Jubin Jacob, Ahmadreza Ghasemiesfe, Greg B Marrinan
The sagittal bands are a component of the extensor hood. They serve an important role in stabilizing the extensor tendon by forming a "check-rein" to radial-ulnar translation of the tendon over the metacarpal head, and extending the metacarpophalangeal (MCP) joint by virtue of attaching the extensor tendon to the palmar plate. Injury to the sagittal band is thought to cause extensor instability and subluxation to the contralateral side by disruption of this "check-rein" function, although recent evidence from cadaver studies suggests that ulnar sagittal band tear may be spared of extensor instability...
November 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29158700/x-ray-crystallographic-and-validated-hptlc-analysis-of-the-biomarker-chromone-glucoside-schumanniofioside-a-isolated-from-acalypha-fruticosa-growing-in-saudi-arabia
#4
Areej M Al-Taweel, Ghada A Fawzy, Shagufta Perveen, Perwez Alam, Ali A El Gamal
A chromone glucoside 2-methyl-5,7-dihydroxychromone 5-O-β-D-glucopyranoside (schumanniofioside A, compound 1) was isolated from the methanol extract of Acalypha fruticosa. The structure of compound 1 was fully assigned based on nuclear magnetic resonance (NMR) ((1)H, (13)C and 2D) spectra and electrospray ionization mass spectrum (ESI-MS) in addition to X-ray Crystallography. The molecules were packed in the crystal structure by eight intermolecular O-H⋯O and C-H⋯O interactions. The structure of compound 1 belongs to monoclinic, P21, a = 9...
November 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/29158511/anti-stokes-photoluminescence-probing-k-conservation-and-thermalization-of-minority-carriers-in-degenerately-doped-semiconductors
#5
K Mergenthaler, N Anttu, N Vainorius, M Aghaeipour, S Lehmann, M T Borgström, L Samuelson, M-E Pistol
It has recently been found that anti-Stokes photoluminescence can be observed in degenerately n-doped indium phosphide nanowires, when exciting directly into the electron gas. This anti-Stokes mechanism has not been observed before and allows the study of carrier relaxation and recombination using standard photoluminescence techniques. It is important to know if this anti-Stokes photoluminescence also occurs in bulk semiconductors as well as its relation to carrier recombination and relaxation. Here we show that similar anti-Stokes photoluminescence can indeed be observed in degenerately doped bulk indium phosphide and gallium arsenide and is caused by minority carriers scattering to high momenta by phonons...
November 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/29157608/retention-and-effective-diffusion-of-model-metabolites-on-porous-graphitic-carbon
#6
Daniel B Lunn, Young J Yun, James W Jorgenson
The study of metabolites in biological samples is of high interest for a wide range of biological and pharmaceutical applications. Reversed phase liquid chromatography is a common technique used for the separation of metabolites, but it provides little retention for polar metabolites. An alternative to C18 bonded phases, porous graphitic carbon has the ability to provide significant retention for both non-polar and polar analytes. The goal of this work is to study the retention and effective diffusion properties of porous graphitic carbon, to see if it is suitable for the wide injection bands and long run times associated with long, packed capillary-scale separations...
November 14, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29157412/behavioral-oscillation-in-face-priming-prediction-about-face-identity-is-updated-at-a-theta-band-rhythm
#7
Yuanye Wang, Huan Luo
In order to deal with external world efficiently, the brain constantly generates predictions about incoming sensory inputs, a process known as "predictive coding." Our recent studies, by employing visual priming paradigms in combination with a time-resolved behavioral measurement, reveal that perceptual predictions about simple features (e.g., left or right orientation) return to low sensory areas not continuously but recurrently in a theta-band (3-4Hz) rhythm. However, it remains unknown whether high-level object processing is also mediated by the oscillatory mechanism and if yes at which rhythm the mechanism works...
2017: Progress in Brain Research
https://www.readbyqxmd.com/read/29156600/fabrication-of-semiconductor-zno-nanostructures-for-versatile-sers-application
#8
REVIEW
Lili Yang, Yong Yang, Yunfeng Ma, Shuai Li, Yuquan Wei, Zhengren Huang, Nguyen Viet Long
Since the initial discovery of surface-enhanced Raman scattering (SERS) in the 1970s, it has exhibited a huge potential application in many fields due to its outstanding advantages. Since the ultra-sensitive noble metallic nanostructures have increasingly exposed themselves as having some problems during application, semiconductors have been gradually exploited as one of the critical SERS substrate materials due to their distinctive advantages when compared with noble metals. ZnO is one of the most representative metallic oxide semiconductors with an abundant reserve, various and cost-effective fabrication techniques, as well as special physical and chemical properties...
November 19, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29156590/enhancement-of-aggregation-induced-emission-by-introducing-multiple-o-carborane-substitutions-into-triphenylamine
#9
Kenta Nishino, Kyoya Uemura, Masayuki Gon, Kazuo Tanaka, Yoshiki Chujo
The enhancement of aggregation-induced emission (AIE) is presented on the basis of the strategy for improving solid-state luminescence by employing multiple o-carborane substituents. We synthesized the modified triphenylamines with various numbers of o-carborane units and compared their optical properties. From the optical measurements, the emission bands from the twisted intramolecular charge transfer (TICT) state were obtained from the modified triphenylamines. It was notable that emission efficiencies of the multi-substituted triphenylamines including two or three o-carborane units were enhanced 6- to 8-fold compared to those of the mono-substituted triphenylamine...
November 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29156513/production-and-characterization-of-keratinolytic-proteases-by-a-chicken-feather-degrading-thermophilic-strain-thermoactinomyces-sp-yt06
#10
Lin Wang, Yuting Qian, Yun Cao, Ying Huang, Zhizhou Chang, Hongying Huang
Thermoactinomyces sp. strain YT06 was isolated from poultry compost and observed to degrade integral chicken feathers at 60°C completely, resulting in the formation of 3.24 mg/mL of free amino acid from 50 mL of culture containing 10 g/L chicken feathers. Strain YT06 could grow and secret keratinase using feather as the only carbon and nitrogen sources without other supplement, but complementation of 10 g/L sucrose and 4 g/L NaNO₃ increased the production of the keratinolytic enzyme. The maximum protease activities obtained were 110 U/mL and keratinase were 42 U/mL...
November 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29155864/supraglottic-squamous-cell-carcinomas-have-distinctive-clinical-features-and-prognosis-based-on-subregion
#11
Weiquan Ding, Tianrun Liu, Jiangang Liang, Tingbao Hu, Shaoyun Cui, Guorong Zou, Weiwei Cai, Ankui Yang
OBJECTIVE: To analyze the clinicopathologic characteristics and prognosis of patients with squamous cell carcinoma localized to different supraglottic subregions. METHODS: Clinicopathologic data were reviewed retrospectively for 111 patients with supraglottic squamous cell carcinoma who were diagnosed between January 1, 1995 and December 31, 2005 and were initially treated with surgery. DNA from human papillomavirus (HPV) 16 and (or /and) HPV 18 were detected in all the 111 supraglottic carcinoma specimens using in situ hybridization...
2017: PloS One
https://www.readbyqxmd.com/read/29154143/investigation-of-various-factors-influencing-raman-spectra-interpretation-with-the-use-of-likelihood-ratio-approach
#12
Aleksandra Michalska, Agnieszka Martyna, Grzegorz Zadora
The main aim of this study was to verify whether selected analytical parameters may affect solving the comparison problem of Raman spectra with the use of the likelihood ratio (LR) approach. Firstly the LR methodologies developed for Raman spectra of blue automotive paints obtained with the use of 785nm laser source (results published by the authors previously) were implemented for good quality spectra recorded for these paints with the use of 514.5nm laser source. For LR models construction two types of variables were used i...
November 3, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29153065/-genotypes-of-rhinoviruses-in-children-and-adults-patients-with-acute-respiratory-tract-infections
#13
Eda Demirkan, Sevin Kırdar, Emel Ceylan, Ayşe Yenigün, İmran Kurt Ömürlü
Rhinovirus (RV) is one of the most frequent causative agent of acute respiratory tract infections in the world. The virus may cause a mild cold, as well as more serious clinical symptoms in patients with immune system deficiency or comorbidities. Rhinoviruses have been identified by molecular methods under three types: RV-A, RV-B and RV-C. In most of the cases, it was reported that RV-A and RV-C were related with lower respiratory tract infections and asthma exacerbations, while RV-B was rarely reported in lower respiratory tract infections...
October 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/29152533/automatic-psoriasis-lesion-segmentation-in-two-dimensional-skin-images-using-multiscale-superpixel-clustering
#14
Yasmeen George, Mohammad Aldeen, Rahil Garnavi
Psoriasis is a chronic skin disease that is assessed visually by dermatologists. The Psoriasis Area and Severity Index (PASI) is the current gold standard used to measure lesion severity by evaluating four parameters, namely, area, erythema, scaliness, and thickness. In this context, psoriasis skin lesion segmentation is required as the basis for PASI scoring. An automatic lesion segmentation method by leveraging multiscale superpixels and [Formula: see text]-means clustering is outlined. Specifically, we apply a superpixel segmentation strategy on CIE-[Formula: see text] color space using different scales...
October 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29151608/the-eso-diffuse-interstellar-bands-large-exploration-survey-edibles-i-project-description-survey-sample-and-quality-assessment
#15
Nick L J Cox, Jan Cami, Amin Farhang, Jonathan Smoker, Ana Monreal-Ibero, Rosine Lallement, Peter J Sarre, Charlotte C M Marshall, Keith T Smith, Christopher J Evans, Pierre Royer, Harold Linnartz, Martin A Cordiner, Christine Joblin, Jacco Th van Loon, Bernard H Foing, Neil H Bhatt, Emeric Bron, Meriem Elyajouri, Alex de Koter, Pascale Ehrenfreund, Atefeh Javadi, Lex Kaper, Habib G Khosroshadi, Mike Laverick, Franck Le Petit, Giacomo Mulas, Evelyne Roueff, Farid Salama, Marco Spaans
The carriers of the diffuse interstellar bands (DIBs) are largely unidentified molecules ubiquitously present in the interstellar medium (ISM). After decades of study, two strong and possibly three weak near-infrared DIBs have recently been attributed to the [Formula: see text] fullerene based on observational and laboratory measurements. There is great promise for the identification of the over 400 other known DIBs, as this result could provide chemical hints towards other possible carriers. In an effort to systematically study the properties of the DIB carriers, we have initiated a new large-scale observational survey: the ESO Diffuse Interstellar Bands Large Exploration Survey (EDIBLES)...
October 2017: Astronomy and Astrophysics
https://www.readbyqxmd.com/read/29151606/a-spectroscopic-survey-of-orion-kl-between-41-5-and-50-ghz
#16
J R Rizzo, B Tercero, J Cernicharo
Context: The nearby massive star-forming region Orion KL is one of the richest molecular reservoirs known in our Galaxy. The region hosts newly formed protostars, and the strong interaction between their radiation and their outflows with the environment results in a series of complex chemical processes leading to a high diversity of interstellar tracers. The region is therefore one of the most frequently observed sources, and the site where many molecular species have been discovered for the first time...
September 2017: Astronomy and Astrophysics
https://www.readbyqxmd.com/read/29150649/non-empirical-atomistic-dipole-interaction-model-for-quantum-plasmon-simulation-of-nanoparticles
#17
Jaechang Lim, Sungwoo Kang, Jaewook Kim, Woo Youn Kim, Seol Ryu
Plasmonic nanoparticles in the quantum regime exhibit characteristic optical properties that cannot be described by classical theories. Time-dependent density functional theory (TDDFT) is rising as a versatile tool for study on such systems, but its application has been limited to very small clusters due to rapidly growing computational costs. We propose an atomistic dipole-interaction-model for quantum plasmon simulations as a practical alternative. Namely the atomic dipole approximation represents induced dipoles with atomic polarizabilities obtained from TDDFT without empirical parameters...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150027/tailored-resections-in-oral-and-oropharyngeal-cancer-using-narrow-band-imaging
#18
Giancarlo Tirelli, Marco Piovesana, Alberto Vito Marcuzzo, Annalisa Gatto, Matteo Biasotto, Rossana Bussani, Lorenzo Zandonà, Fabiola Giudici, Francesca Boscolo Nata
PURPOSE: In a previous pilot study we observed that intra-operative narrow-band imaging (NBI) helps achieve clear superficial resection margins. The aim of this study was to verify if the use of intra-operative NBI can help to obtain tailored resections and if it is influenced by the lesion site, aspects not investigated in our previous study. MATERIALS AND METHODS: The resection margins of 39 oral and 22 oropharyngeal squamous cell carcinomas were first set at 1...
November 10, 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/29149444/morphology-molecular-structure-and-stable-carbon-isotopic-composition-of-black-carbon-bc-in-urban-topsoils
#19
Yutong Zong, Qing Xiao, Shenggao Lu
Urban soils contain significant amounts of black carbon (BC) from biomass and fossil fuel combustion and regard to be a pool of BC. BC in urban soils has multiple effects on environmental processes in urban system, such as global climate change, air quality, and public health. Urban topsoil samples (0-10 cm) were collected from Anshan, Liaoning Province, northeast China, which is one of the most important old steel industrial bases in China. The BC in urban topsoils was extracted using the density method. Their chemical composition, morphology, molecular structure, and stable carbon isotopic composition were examined using elemental analysis, scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and stable carbon isotope (δ(13)C)...
November 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29148594/metabolic-study-of-paeoniflorin-and-total-paeony-glucosides-from-paeoniae-radix-rubra-in-rats-by-high-performance-liquid-chromatography-coupled-with-sequential-mass-spectrometry-uplc-esi-ms-n
#20
Lijun Zhu, Shanshan Sun, Yanxi Hu, Yufeng Liu
A clear understanding of the metabolism of Traditional Chinese Medicine (TCM) is extremely important in their rational clinical application and effective material foundation research. A novel and reliable strategy was performed to find more metabolites of paeoniflorin, determine the metabolites of total paeony glucosides (TPG) by means of determining those metabolites of paeoniflorin, and compare the metabolism differences between paeoniflorin and TPG by intragastric administration. This strategy was characterized as follows: firstly, the rats were divided into two groups (the paeoniflorin group and the TPG group) to find different metabolism mechanism between paeoniflorin and TPG; secondly, UPLC-FT-ICR MS and UPLC-Q-TOF MS(2) were applied to obtain accurate molecular weight and structural information respectively; thirdly, the metabolites were tentatively identified by a combination of data-processing methods including mass defect screening, characteristic neutral loss screening and product ion screening; finally, a comparative study was employed in the metabolism of paeoniflorin and TPG...
November 17, 2017: Biomedical Chromatography: BMC
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