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https://www.readbyqxmd.com/read/28343106/a-structure-based-plasma-protein-pre-fractionation-using-conjoint-immobilized-metal-chelate-affinity-ima-system
#1
Karan Karkra, Kishore K R Tetala, M A Vijayalakshmi
The potential of immobilized metal/chelate affinity (IMA) in a continuous fashion, referred as conjoint approach, to pre-fractionate plasma proteins (in their native state) prior to LC-MS analysis was investigated in this study. Four transition metal-ions (Co (II), Zn (II), Ni (II) and Cu (II)) were individually chelated with IDA (iminodiacetic acid) coated CIM (Convective Interaction Media) disks and placed in a single housing in the following sequential order: IDA-Co (II)→IDA-Zn (II)→IDA-Ni (II)→IDA-Cu (II)...
March 10, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28343087/cad-cam-machining-vs-pre-sintering-in-lab-fabrication-techniques-of-y-tzp-ceramic-specimens-effects-on-their-mechanical-fatigue-behavior
#2
C P Zucuni, L F Guilardi, S Fraga, L G May, G K R Pereira, L F Valandro
This study evaluated the effects of different pre-sintering fabrication processing techniques of Y-TZP ceramic (CAD/CAM Vs. in-lab), considering surface characteristics and mechanical performance outcomes. Pre-sintered discs of Y-TZP ceramic (IPS e.max ZirCAD, Ivoclar Vivadent) were produced using different pre-sintering fabrication processing techniques: Machined- milling with a CAD/CAM system; Polished- fabrication using a cutting device followed by polishing (600 and 1200 SiC papers); Xfine- fabrication using a cutting machine followed by grinding with extra-fine diamond bur (grit size 30 μm); Fine- fabrication using a cutting machine followed by grinding with fine diamond bur (grit size 46 μm); SiC- fabrication using a cutting machine followed by grinding with 220 SiC paper...
March 18, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28342729/repeatability-and-agreement-of-scheimpflug-based-and-swept-source-optical-biometry-measurements
#3
Saadettin Sel, Jana Stange, Delia Kaiser, Laszlo Kiraly
PURPOSE: To evaluate the repeatability and comparability of biometry parameters between a Scheimpflug-based topography with axial length measurement (Pentacam AXL, Oculus, Wetzlar, Germany) and a swept-source optical biometry (IOLMaster 700, Carl Zeiss Meditec AG, Jena, Germany). METHODS: A total of 50 eyes from 50 adult subjects had biometry measurements in one session three times using the Pentacam AXL and the IOLMaster 700. Keratometry, anterior chamber depth (ACD) and axial length (AL) values were obtained by both devices...
March 22, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28340505/afferent-and-efferent-connections-of-the-interpeduncular-nucleus-with-special-reference-to-circuits-involving-the-habenula-and-raphe-nuclei
#4
Leandro B Lima, Debora Bueno, Fernanda Leite, Stefani Souza, Luciano Gonçalves, Isadora C Furigo, Jose Donato, Martin Metzger
The habenula is an epithalamic structure differentiated into two nuclear complexes, medial (MHb) and lateral habenula (LHb). Recently, MHb together with its primary target, the interpeduncular nucleus (IP), have been identified as major players in mediating the aversive effects of nicotine. However, structures downstream of the MHb-IP axis, including the median (MnR) and caudal dorsal raphe nucleus (DRC), may contribute to the behavioral effects of nicotine. The afferent and efferent connections of the IP have hitherto not been systematically investigated with sensitive tracers...
March 24, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28338573/a-machine-learning-based-surface-electromyography-topography-evaluation-for-prognostic-prediction-of-functional-restoration-rehabilitation-in-chronic-low-back-pain
#5
Naifu Jiang, Keith Dip-Kei Luk, Yong Hu
STUDY DESIGN: A retrospective study. OBJECTIVE: To investigate the feasibility and applicability of support vector machine (SVM) algorithm in classifying patients with LBP who would obtain satisfactory or unsatisfactory progress after the functional restoration rehabilitation program. SUMMARY OF BACKGROUND DATA: Dynamic surface electromyography (SEMG) topography has demonstrated the potential use in predicting the prognosis of functional restoration rehabilitation for patients with low back pain (LBP)...
March 23, 2017: Spine
https://www.readbyqxmd.com/read/28336901/an-optical-sensor-with-polyaniline-gold-hybrid-nanostructures-for-monitoring-ph-in-saliva
#6
Chongdai Luo, Yangyang Wang, Xuemeng Li, Xueqin Jiang, Panpan Gao, Kang Sun, Jianhua Zhou, Zhiguang Zhang, Qing Jiang
Saliva contains important personal physiological information that is related to some diseases, and it is a valuable source of biochemical information that can be collected rapidly, frequently, and without stress. In this article, we reported a new and simple localized surface plasmon resonance (LSPR) substrate composed of polyaniline (PANI)-gold hybrid nanostructures as an optical sensor for monitoring the pH of saliva samples. The overall appearance and topography of the substrates, the composition, and the wettability of the LSPR surfaces were characterized by optical and scanning electron microscope (SEM) images, infrared spectra, and contact angles measurement, respectively...
March 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336849/modification-of-the-surface-topography-and-composition-of-ultrafine-and-coarse-grained-titanium-by-chemical-etching
#7
Denis V Nazarov, Elena G Zemtsova, Alexandr Yu Solokhin, Ruslan Z Valiev, Vladimir M Smirnov
In this study, we present the detailed investigation of the influence of the etching medium (acidic or basic Piranha solutions) and the etching time on the morphology and surface relief of ultrafine grained (UFG) and coarse grained (CG) titanium. The surface relief and morphology have been studied by means of scanning electron microscopy (SEM), atomic force microscopy (AFM), and the spectral ellipsometry. The composition of the samples has been determined by X-ray fluorescence analysis (XRF) and X-ray Photoelectron Spectroscopy (XPS)...
January 13, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336224/surface-coverage-with-single-vs-multiple-gaze-surface-topography-to-fit-scleral-lenses
#8
Gregory DeNaeyer, Donald R Sanders, Timothy S Farajian
OBJECTIVES: To determine surface coverage of measurements using the sMap3D(®) corneo-scleral topographer in patients presenting for scleral lens fitting. METHODS: Twenty-five eyes of 23 scleral lens patients were examined. Up-gaze, straight-gaze, and down-gaze positions of each eye were "stitched" into a single map. The percentage surface coverage between 10mm and 20mm diameter circles from corneal center was compared between the straight-gaze and stitched images...
March 20, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28335337/effect-of-crystal-orientation-on-self-assembly-nanocones-formed-on-tungsten-surface-induced-by-helium-ion-irradiation-and-annealing
#9
Shilin Huang, Guang Ran, Penghui Lei, Shenghua Wu, Nanjun Chen, Ning Li
The self-assembly nanocone structures on the surface of polycrystalline tungsten were created by He⁺ ion irradiation and then annealing, and the resulting topography and morphology were characterized using atomic force microscopy and scanning electron microscopy. The cross-sectional samples of the self-assembly nanocones were prepared using an in situ-focused ion beam and then observed using transmission electron microscopy. The self-assembly nanocones were induced by the combined effect of He⁺ ion irradiation, the annealing process and the chromium impurity...
November 12, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335325/nanoscale-electric-characteristics-and-oriented-assembly-of-halobacterium-salinarum-membrane-revealed-by-electric-force-microscopy
#10
Denghua Li, Yibing Wang, Huiwen Du, Shiwei Xu, Zhemin Li, Yanlian Yang, Chen Wang
Purple membranes (PM) of the bacteria Halobacterium salinarum are a unique natural membrane where bacteriorhodopsin (BR) can convert photon energy and pump protons. Elucidating the electronic properties of biomembranes is critical for revealing biological mechanisms and developing new devices. We report here the electric properties of PMs studied by using multi-functional electric force microscopy (EFM) at the nanoscale. The topography, surface potential, and dielectric capacity of PMs were imaged and quantitatively measured in parallel...
November 2, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335186/ex-vivo-tissues-engineering-modeling-for-reconstructive-surgery-using-human-adult-adipose-stem-cells-and-polymeric-nanostructured-matrix
#11
Francesco Morena, Chiara Argentati, Eleonora Calzoni, Marino Cordellini, Carla Emiliani, Francesco D'Angelo, Sabata Martino
The major challenge for stem cell translation regenerative medicine is the regeneration of damaged tissues by creating biological substitutes capable of recapitulating the missing function in the recipient host. Therefore, the current paradigm of tissue engineering strategies is the combination of a selected stem cell type, based on their capability to differentiate toward committed cell lineages, and a biomaterial, that, due to own characteristics (e.g., chemical, electric, mechanical property, nano-topography, and nanostructured molecular components), could serve as active scaffold to generate a bio-hybrid tissue/organ...
March 31, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335129/the-topography-of-cerebral-ischemic-accidents-influences-the-results-of-the-surgery-of-the-symptomatic-carotid-stenoses
#12
Caroline Kazandjian, Nicla Settembre, Julien Koenig, Benjamin Kretz, Serguei Malikov, Elixène Jean-Baptiste, Éric Steinmetz
No abstract text is available yet for this article.
January 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28334314/a-template-and-probabilistic-atlas-of-the-human-sensorimotor-tracts-using-diffusion-mri
#13
Derek B Archer, David E Vaillancourt, Stephen A Coombes
The purpose of this study was to develop a high-resolution sensorimotor area tract template (SMATT) which segments corticofugal tracts based on 6 cortical regions in primary motor cortex, dorsal premotor cortex, ventral premotor cortex, supplementary motor area (SMA), pre-supplementary motor area (preSMA), and primary somatosensory cortex using diffusion tensor imaging. Individual probabilistic tractography analyses were conducted in 100 subjects using the highest resolution data currently available. Tractography results were refined using a novel algorithm to objectively determine slice level thresholds that best minimized overlap between tracts while preserving tract volume...
March 14, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28332250/visual-hallucinations-in-patients-with-acute-stroke-a-prospective-exploratory-study
#14
E Morenas-Rodríguez, P Camps-Renom, A Pérez-Cordón, A Horta-Barba, M Simón-Talero, E Cortés-Vicente, D Guisado-Alonso, E Vilaplana, C García-Sánchez, A Gironell, C Roig, R Delgado-Mederos, J Martí-Fàbregas
BACKGROUND AND PURPOSE: The incidence, underlying physiopathology, features and association with lesion topography of visual hallucinations in acute stroke have scarcely been investigated. METHODS: Patients with a diagnosis of acute stroke (ischaemic or haemorrhagic) in any vascular territory, admitted within 24 h after the onset of symptoms, were consecutively included in the study. Patients with a previous history of psychosis or cognitive impairment were excluded...
March 22, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28332092/the-spectrum-of-neuropathological-changes-associated-with-congenital-zika-virus-infection
#15
Leila Chimelli, Adriana S O Melo, Elyzabeth Avvad-Portari, Clayton A Wiley, Aline H S Camacho, Vania S Lopes, Heloisa N Machado, Cecilia V Andrade, Dione C A Dock, Maria Elisabeth Moreira, Fernanda Tovar-Moll, Patricia S Oliveira-Szejnfeld, Angela C G Carvalho, Odile N Ugarte, Alba G M Batista, Melania M R Amorim, Fabiana O Melo, Thales A Ferreira, Jacqueline R L Marinho, Girlene S Azevedo, Jeime I B F Leal, Rodrigo F Madeiro da Costa, Stevens Rehen, Monica B Arruda, Rodrigo M Brindeiro, Rodrigo Delvechio, Renato S Aguiar, Amilcar Tanuri
A major concern associated with ZIKV infection is the increased incidence of microcephaly with frequent calcifications in infants born from infected mothers. To date, postmortem analysis of the central nervous system (CNS) in congenital infection is limited to individual reports or small series. We report a comprehensive neuropathological study in ten newborn babies infected with ZIKV during pregnancy, including the spinal cords and dorsal root ganglia (DRG), and also muscle, pituitaries, eye, systemic organs, and placentas...
March 22, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28331589/complex-variation-in-habitat-selection-strategies-among-individuals-driven-by-extrinsic-factors
#16
Edward J Raynor, Hawthorne L Beyer, John M Briggs, Anthony Joern
Understanding behavioral strategies employed by animals to maximize fitness in the face of environmental heterogeneity, variability, and uncertainty is a central aim of animal ecology. Flexibility in behavior may be key to how animals respond to climate and environmental change. Using a mechanistic modeling framework for simultaneously quantifying the effects of habitat preference and intrinsic movement on space use at the landscape scale, we investigate how movement and habitat selection vary among individuals and years in response to forage quality-quantity tradeoffs, environmental conditions, and variable annual climate...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28331312/investigation-of-silk-fibroin-nanoparticle-decorated-poly-l-lactic-acid-composite-scaffolds-for-osteoblast-growth-and-differentiation
#17
Biao-Qi Chen, Ranjith Kumar Kankala, Ai-Zheng Chen, Ding-Zhu Yang, Xiao-Xia Cheng, Ni-Na Jiang, Kai Zhu, Shi-Bin Wang
Attempts to reflect the physiology of organs is quite an intricacy during the tissue engineering process. An ideal scaffold and its surface topography can address and manipulate the cell behavior during the regeneration of targeted tissue, affecting the cell growth and differentiation significantly. Herein, silk fibroin (SF) nanoparticles were incorporated into poly(l-lactic acid) (PLLA) to prepare composite scaffolds via phase-inversion technique using supercritical carbon dioxide (SC-CO2). The SF nanoparticle core increased the surface roughness and hydrophilicity of the PLLA scaffolds, leading to a high affinity for albumin attachment...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28330986/diffusion-or-advection-mass-transfer-and-complex-boundary-layer-landscapes-of-the-brown-alga-fucus-vesiculosus
#18
Mads Lichtenberg, Rasmus Dyrmose Nørregaard, Michael Kühl
The role of hyaline hairs on the thallus of brown algae in the genus Fucus is long debated and several functions have been proposed. We used a novel motorized set-up for two-dimensional and three-dimensional mapping with O2 microsensors to investigate the spatial heterogeneity of the diffusive boundary layer (DBL) and O2 flux around single and multiple tufts of hyaline hairs on the thallus of Fucus vesiculosus. Flow was a major determinant of DBL thickness, where higher flow decreased DBL thickness and increased O2 flux between the algal thallus and the surrounding seawater...
March 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28330788/oral-cancer-characteristics-in-france-descriptive-epidemiology-for-early-detection
#19
K Jéhannin-Ligier, O Dejardin, M Colonna, A V Guizard
Despite the frequency and lethality of oral cancers in France, there are no detailed general population data regarding the characteristics of these patients to fuel the public health authorities' reflections about early detection policies. Thus, the objective of this study was to determine, in the general population, the characteristics of both patients and tumours at the time of the diagnosis. A high-resolution, population-based study using 13 French registries was conducted on 1089 tumours diagnosed in 2010...
February 24, 2017: J Stomatol Oral Maxillofac Surg
https://www.readbyqxmd.com/read/28328608/tomographic-evaluation-of-prevalence-position-and-diameter-of-the-intraosseous-branch-of-the-posterior-superior-alveolar-artery-in-fully-edentulous-individuals
#20
Guilherme José Pimentel Lopes de Oliveira, Marciel Antônio Abdala, Hugo Nary-Filho, Celso Eduardo Sakakura, Valdir Gouveia Garcia, Felipe Coletti Leite
The objective of this study was to evaluate the presence, position, and diameter of the intraosseous branch (IObr) of the posterior superior alveolar artery in fully edentulous patients. Two-hundred five computed tomography scans of fully edentulous patients were analyzed. The presence of the IObr was investigated in the coronal plane at the lateral wall of the maxillary sinus. In patients in whom the IObr was detected, the artery diameter was measured, and the distance from the artery to the bone crest of the alveolar ridge, the maxillary sinus floor, and the distance of the maxillary sinus floor to the bone crest of the alveolar ridge were measured as well...
March 21, 2017: Journal of Craniofacial Surgery
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