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https://www.readbyqxmd.com/read/28822153/-analyze-moisture-transformation-and-transport-rules-during-processing-of-paeoniae-radix-alba-by-using-low-field-nmr
#1
Wen-Juan Duan, Yue Li, Li Cui, Feng Liu, Guo-Hong Yang, Lan-Ping Guo, Xiao Wang
Moisture status and content during the processing of Paeoniae Radix Alba were studied by nuclear magnetic resonance (NMR) and nuclear magnetic resonance imaging (MRI) to investigate the changes of transverse relaxation time (T ₂) and MRI images during boiling and drying processes of Paeoniae Radix Alba. The results showed that water in Paeoniae Radix Alba fresh products was major of free water, and in the boiling process, the content of free water increased whereas the content of bound water declined. At the end of boiling, content of free water reached over 90%...
June 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28821068/radiation-synthesis-and-performance-of-novel-cellulose-based-microsphere-adsorbents-for-efficient-removal-of-boron-iii
#2
Siqi Liu, Min Xu, Tianlin Yu, Dong Han, Jing Peng, Jiuqiang Li, Maolin Zhai
A novel cellulose-based microsphere containing glucamine groups, referred as CVN, was successfully synthesized by radiation-induced graft polymerization of 4-vinylbenzyl chloride onto cellulose microspheres and subsequent functionalization with N-methyl-d-glucamine. The adsorption by CVN for boron (III) from aqueous solutions was evaluated systematically by batch adsorption technique. Langmuir models could fit well with the adsorption behavior of CVN. The CVN adsorbents exhibited a high adsorption capacity up to 12...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820446/towards-scalable-strain-gauge-based-joint-torque-sensors
#3
Hamza Khan, Mariapaola D'Imperio, Ferdinando Cannella, Darwin G Caldwell, Alfred Cuschieri, Claudio Semini
During recent decades, strain gauge-based joint torque sensors have been commonly used to provide high-fidelity torque measurements in robotics. Although measurement of joint torque/force is often required in engineering research and development, the gluing and wiring of strain gauges used as torque sensors pose difficulties during integration within the restricted space available in small joints. The problem is compounded by the need for a scalable geometric design to measure joint torque. In this communication, we describe a novel design of a strain gauge-based mono-axial torque sensor referred to as square-cut torque sensor (SCTS), the significant features of which are high degree of linearity, symmetry, and high scalability in terms of both size and measuring range...
August 18, 2017: Sensors
https://www.readbyqxmd.com/read/28820196/on-the-mobility-of-carriers-at-semi-coherent-oxide-heterointerfaces
#4
Pratik P Dholabhai, Enrique Martínez, Nicholas T Brown, Blas Pedro Uberuaga
In the quest to develop new materials with enhanced ionic conductivity for battery and fuel cell applications, nano-structured oxides have attracted attention. Experimental reports indicate that oxide heterointerfaces can lead to enhanced ionic conductivity, but these same reports cannot elucidate the origin of this enhancement, often vaguely referring to pipe diffusion at misfit dislocations as a potential explanation. However, this highlights the need to understand the role of misfit dislocation structure at semi-coherent oxide heterointerfaces in modifying carrier mobilities...
August 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28818688/anodization-of-magnesium-for-biomedical-applications-processing-characterization-degradation-and-cytocompatibility
#5
Aaron F Cipriano, Jiajia Lin, Christopher Miller, Alan Lin, Mayra C Cortez Alcaraz, Pedro Soria, Huinan Liu
This article reports anodization of Mg in KOH electrolyte and the associated surface, degradation, and biological properties for bioresorbable implant applications. The preparation procedures for electrodes and anodization setup significantly enhanced reproducibility of samples. The results of anodization performed at the applied potentials of 1.8, 1.9, or 2.0 V showed that the sample anodized at 1.9 V and annealed, referred to as the 1.9 AA sample, had homogenous surface microstructure and elemental composition, and a reduction in corrosion current density in the electrochemical testing...
August 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28818118/effects-of-age-and-stimulus-material-on-character-introductions-of-swedish-speaking-four-to-six-year-olds
#6
Josefin Lindgren
This study investigates effects of age on character introductions in the oral narratives of seventy-two monolingual Swedish-speaking four- to six-year-olds, comparing results from the Multilingual Assessment Instrument for Narratives (MAIN; Gagarina et al., 2012, 2015), and the Edmonton Narrative Norms Instrument (ENNI; Schneider et al., 2005). The proportion of appropriate referring expressions for introducing story characters clearly increases from age four to six. However, the children's performance is strongly stimulus-dependent...
August 18, 2017: Journal of Child Language
https://www.readbyqxmd.com/read/28817383/combined-influence-of-ct-random-noise-and-hu-rsp-calibration-curve-nonlinearities-on-proton-range-systematic-errors
#7
Sébastien Brousmiche, Kevin Souris, Jonathan Orban de Xivry, John Aldo Lee, Benoit Macq, Joao Seco
Proton range random and systematic uncertainties are the major factors undermining the advantages of proton therapy, namely, a sharp dose falloff and a better dose conformality for lower doses in normal tissues. The influence of CT artifacts such as beam hardening or scatter can easily be understood and estimated due to their large-scale effects on the CT image, like cupping and streaks. In comparison, the effects of weakly-correlated stochastic noise are more insidious and less attention is drawn on them partly due to the common belief that they only contribute to proton range uncertainties and not to systematic errors thanks to some averaging effects...
August 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28817168/infection-with-a-novel-derogenid-trematode-in-a-flap-necked-chameleon-chamaeleo-dilepis
#8
Nancy B Collicutt, Nicole I Stacy, Heather Stockdale Walden, April Childress, Jennifer Dill, Marita Anderson, James F X Wellehan
A 2-year-old female Flap-necked chameleon (Chamaeleo dilepis) was presented with a history of anorexia. On physical examination, three 11×4×2 mm, light tan-pink, raised, gelatinous, freely movable, poorly demarcated, raised nodules were identified within the oral cavity. An impression smear contained multiple, light blue to green structures exhibiting an 18×35 μm, elliptical-shaped anterior portion and a single 1×150 μm filament with a tapered end. Initial differential etiologies included trematode ova, flagellate protozoa, fungal sporangia, plant material, and sperm...
August 17, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28817089/measurement-techniques-of-the-magneto-electric-coupling-in-multiferroics
#9
REVIEW
M M Vopson, Y K Fetisov, G Caruntu, G Srinivasan
The current surge of interest in multiferroic materials demands specialized measurement techniques to support multiferroics research. In this review article we detail well-established measurement techniques of the magneto-electric coupling coefficient in multiferroic materials, together with newly proposed ones. This work is intended to serve as a reference document for anyone willing to develop experimental measurement techniques of multiferroic materials.
August 17, 2017: Materials
https://www.readbyqxmd.com/read/28816659/low-frequency-and-broadband-vibration-energy-harvesting-using-base-mounted-piezoelectric-transducers
#10
Robert Koven, Matthew Mills, Richard Gale, Burak Aksak
Piezoelectric vibration energy harvesters often consist of a cantilevered beam composed of a support layer and one or two piezoelectric layers with a tip mass. While this configuration is advantageous for maximizing electromechanical coupling, the mechanical properties of the piezoelectric material can place limitations on harvester size and resonant frequency. Here, we present numerical and experimental results from a new type of piezoelectric energy harvester in which the mechanical properties and the resonant frequency of the cantilever beam resonator are effectively decoupled from the piezoelectric component...
August 14, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28815280/overcoming-challenges-in-single-particle-inductively-coupled-plasma-mass-spectrometry-measurement-of-silver-nanoparticles
#11
Jingyu Liu, Karen E Murphy, Michael R Winchester, Vincent A Hackley
Single particle ICP-MS has evolved rapidly as a quantitative method for determining nanoparticle size and number concentration at environmentally relevant exposure levels. Central to the application of spICP-MS is a commonly used, but not rigorously validated, calibration approach based on the measured transport efficiency and the response of ionic standards. In this work, we present a comprehensive and systematic study of the accuracy, precision and robustness of spICP-MS using the rigorously characterized reference material (RM) 8017 (Polyvinylpyrrolidone Coated Nominal 75 nm Silver Nanoparticles), recently issued by the National Institute of Standards and Technology (NIST)...
August 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28815244/-cytotoxicity-of-carboxymethyl-chitosan-zinc-and-peptide-to-human-periodontal-ligament-cells
#12
Hui Guo, Ke-Qing Pan, Jing Deng, Xue-Yu Liu, Jia Song
PURPOSE: The purpose of this investigation was to study the cytotoxicity of carboxymethyl chitosan zinc and peptide to human periodontal ligament cells in vitro, in order to provide a reference for understanding materials' safety. METHODS: The primary cells were obtained from human periodontal tissues and cultured. The cultured cells were identified by observing the shape under microscope and by immunocytochemical method. HPDLCs were cultured in different concentrations of the tested materials extract and the activity of cells was evaluated using CCK-8 assay...
April 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28813744/alkaptonuria-a-case-report-with-diagnostic-challenge
#13
Vasantha L Gali, Amy M Kerkvliet, Jacob M Kusmak, Jana K Elwood
Alkaptonuria is a rare autosomal recessive metabolic disorder caused by deficiency of homogentisic acid (HGA) oxidase, the only enzyme capable of catabolizing HGA. Deficiency of this enzyme leads to excess HGA which deposits in the connective tissue. We present a case of a 64-year-old woman who was referred to the dermatology clinic for a full body mole check and skin cancer screening. Clinically she had blue/gray pigmentation of the external ear and sclera. Also she had a domed papule on the left cheek with punctate gray pigmentation which was biopsied...
August 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28812998/a-framework-based-on-reference-data-with-superordinate-accuracy-for-the-quality-analysis-of-terrestrial-laser-scanning-based-multi-sensor-systems
#14
Ulrich Stenz, Jens Hartmann, Jens-André Paffenholz, Ingo Neumann
Terrestrial laser scanning (TLS) is an efficient solution to collect large-scale data. The efficiency can be increased by combining TLS with additional sensors in a TLS-based multi-sensor-system (MSS). The uncertainty of scanned points is not homogenous and depends on many different influencing factors. These include the sensor properties, referencing, scan geometry (e.g., distance and angle of incidence), environmental conditions (e.g., atmospheric conditions) and the scanned object (e.g., material, color and reflectance, etc...
August 16, 2017: Sensors
https://www.readbyqxmd.com/read/28812808/history-structure-and-agency-in-global-health-governance-comment-on-global-health-governance-challenges-2016-are-we-ready
#15
Stephen Gill, Solomon R Benatar
Ilona Kickbusch's thought provoking editorial is criticized in this commentary, partly because she fails to refer to previous critical work on the global conditions and policies that sustain inequality, poverty, poor health and damage to the biosphere and, as a result, she misreads global power and elides consideration of the fundamental historical structures of political and material power that shape agency in global health governance. We also doubt that global health can be improved through structures and processes of multilateralism that are premised on the continued reproduction of the ecologically myopic and socially unsustainable market civilization model of capitalist development that currently prevails in the world economy...
August 29, 2016: International Journal of Health Policy and Management
https://www.readbyqxmd.com/read/28812090/zero-charged-catanionic-lamellar-liquid-crystals-doped-with-fullerene-c60-for-potential-applications-in-tribology
#16
Mengjun Chen, Baoyong Liu, Xiaolin Wang, Yanxu Fu, Jingcheng Hao, Hongguang Li
The formation of lamellar liquid crystals (LLCs) has been demonstrated in a few salt-free catanionic surfactant systems and their properties have been well documented. However, examples of their combination with other materials are relatively rare. Herein, a salt-free zero-charged catanionic surfactant with low chain melting temperature was prepared by mixing equimolar tetradecyltrimethylammonium oxide (TTAOH) and oleic acid (OA) in water, and its concentration-dependent aggregate transition was investigated...
August 16, 2017: Soft Matter
https://www.readbyqxmd.com/read/28811929/dual-energy-computed-tomography-angiography-virtual-calcified-plaque-subtraction-in-a-vascular-phantom
#17
Kwang Nam Jin, Jin Wook Chung, Eun-Ah Park, Whal Lee
BACKGROUND: Material decomposition of dual-energy computed tomography (DECT) enables subtraction of calcified plaque. PURPOSE: To evaluate the accuracy of lumen area measurement in calcified plaque by subtraction of DECT and to determine the effect of contrast material concentration, lumen diameter, density, and thickness of calcified plaque for the measurement. MATERIAL AND METHODS: Vessel phantoms were made with six lumen diameters (5.7, 4...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28811021/quantitative-analysis-of-major-and-trace-elements-in-nh4hf2-modified-silicate-rock-powders-by-laser-ablation-inductively-coupled-plasma-mass-spectrometry
#18
Wen Zhang, Zhaochu Hu, Yongsheng Liu, Wenwu Yang, Haihong Chen, Shenghong Hu, Hongyan Xiao
In this paper, we described a NH4HF2 digestion method as sample preparation for the rapid determination of major and trace elements in silicate rocks using laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS). Sample powders digested by NH4HF2 at 230 °C for 3 h form ultrafine powders with a typical grain size d80 < 8.5 μm, and various silicate rocks have a consistent grain morphology and size, allowing us to produce pressed powder pellets that have excellent cohesion and homogeneity suitable for laser ablation micro-analysis without the addition of binder...
August 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28810179/utility-of-ultrasound-assisted-cloud-point-extraction-and-spectophotometry-as-a-preconcentration-and-determination-tool-for-the-sensitive-quantification-of-mercury-species-in-fish-samples
#19
Nail Altunay
The current study reports, for the first time, the development of a new analytical method employing ultrasound assisted-cloud point extraction (UA-CPE) for the extraction of CH3Hg(+) and Hg(2+) species from fish samples. Detection and quantification of mercury species were performed at 550nm by spectrophotometry. The analytical variables affecting complex formation and extraction efficiency were extensively evaluated and optimized by univariate method. Due to behave 14-fold more sensitive and selective of thiophene 2,5-dicarboxylic acid (H2TDC) to Hg(2+) ions than CH3Hg(+) in presence of mixed surfactant, Tween 20 and SDS at pH5...
August 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28809904/sparse-spatially-phase-retarded-spectroscopic-ellipsometry-for-real-time-film-analysis
#20
Dae Hee Kim, Young Ho Yun, Ki-Nam Joo
In this Letter, we propose a novel type of spectroscopic ellipsometer, named spatially phase-retarded spectroscopic ellipsometry (SPARSE), based on the spatial polarization distribution opposed to the temporal polarization changes. SPARSE can collect all information necessary to characterize film structures with a single image acquisition, and it has the benefit of real-time measurements. For the verification, feasible experiments with single film-layered certificated reference materials and multi-layered film specimens were carried out...
August 15, 2017: Optics Letters
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