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https://www.readbyqxmd.com/read/28651240/indirect-spectrophotometric-determination-of-sulfadiazine-based-on-localized-surface-plasmon-resonance-peak-of-silver-nanoparticles-after-cloud-point-extraction
#1
Elahe Kazemi, Shayessteh Dadfarnia, Ali Mohammad Haji Shabani, Mohammad Reza Fattahi, Javad Khodaveisi
A novel, efficient, easy to use, environmentally friendly and cost-effective methodology is developed for the indirect spectrophotometric determination of sulfadiazine in different samples. The method is based on the micelle-mediated extraction of silver sulfadiazine and converting the silver content of the resultant surfactant-rich phase to the silver nanoparticles via generation of [Ag(NH3)2](+) followed by its chemical reduction using ascorbic acid. The changes in the amplitude of localized surface plasmon resonance peak of silver nanoparticles as a function of sulfadiazine concentration in the sample solution was monitored using fiber optic linear array spectrophotometry at 457nm...
June 17, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28651131/formic-acid-production-using-a-microbial-electrolysis-desalination-and-chemical-production-cell
#2
Yaobin Lu, Haiping Luo, Kunpeng Yang, Guangli Liu, Renduo Zhang, Xiao Li, Bo Ye
The aim of this study was to investigate the feasibility and optimization of formic acid production in the microbial electrolysis desalination and chemical-production cell (MEDCC). The maximum current density in the MEDCC with 72cm of the anode fiber length (72-MEDCC) reached 24.0±2.0A/m(2), which was much higher than previously reported. The maximum average formic acid production rate in the 72-MEDCC was 5.28 times higher than that in the MEDCC with 24cm of the anode fiber length (37.00±1.15vs. 7.00±0.25mg/h)...
June 13, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28651048/nutritional-and-metabolic-characteristics-of-brassica-carinata-coproducts-from-biofuel-processing-in-dairy-cows
#3
Yajing Ban, Nazir Ahmad Khan, Peiqiang Yu
The increased utilization of Brassica carinata in the biofuel industry in Canada has resulted in the large scale production of coproducts that can be potentially exploited as alternative protein ingredient in dairy ration. The objectives of this study were to investigate the nutritive value of carinata presscake and meal for dairy cows in terms of (1) nutrient and anti-nutrient composition; (2) rumen degradation kinetics of organic matter (OM), crude protein (CP) and neutral detergent fiber; (3) hourly effective degradation ratio and potential N to energy synchronization; (4) intestinal digestion of rumen undegraded protein (RUP); and (5) total metabolizable protein (MP) supply to the small intestine...
June 26, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28651042/effect-of-dephytinization-by-fermentation-and-hydrothermal-autoclaving-treatments-on-the-antioxidant-activity-dietary-fiber-and-phenolic-content-of-oat-bran
#4
H Özkaya, B Özkaya, B Duman, S Turksoy
Fermentation and hydrothermal methods were tested to reduce the phytic acid (PA) content of oat bran and the effects of these methods on the dietary fiber (DF) and total phenolic (TP) contents and antioxidant activity (AA) were also investigated. Fermentation with 6% yeast and for 6 h resulted in 88.2% reduction in PA content while it was only 32.5% in sample incubated for 6 h without yeast addition. The PA loss in autoclaved oat bran sample (1.5 h, pH 4.0) was 95.2% while it was at most 41.8% in sample autoclaved without pH adjustment...
June 26, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28650925/quantitative-analysis-of-the-inner-retinal-layer-thicknesses-in-age-related-macular-degeneration-using-corrected-optical-coherence-tomography-segmentation
#5
Ilkay Kilic Muftuoglu, Hema L Ramkumar, Dirk-Uwe Bartsch, Amit Meshi, Raouf Gaber, William R Freeman
PURPOSE: To characterize inner retinal damage in patients with dry age-related macular degeneration (AMD) using high-resolution spectral domain optical coherence tomography images. METHODS: Sixty eyes of 60 patients with AMD were categorized using the Age-Related Eye Disease Study (AREDS) severity scale. Spectral domain optical coherence tomography images of these patients were quantified by manually correcting the segmentation of each retinal layer, including the retinal nerve fiber layer, ganglion cell layer, and inner plexiform layer to ensure accurate delineation of layers...
June 23, 2017: Retina
https://www.readbyqxmd.com/read/28650457/fibroblast-growth-factor-19-regulates-skeletal-muscle-mass-and-ameliorates-muscle-wasting-in-mice
#6
Bérengère Benoit, Emmanuelle Meugnier, Martina Castelli, Stéphanie Chanon, Aurélie Vieille-Marchiset, Christine Durand, Nadia Bendridi, Sandra Pesenti, Pierre-Axel Monternier, Anne-Cécile Durieux, Damien Freyssenet, Jennifer Rieusset, Etienne Lefai, Hubert Vidal, Jérôme Ruzzin
The endocrine-derived hormone fibroblast growth factor (FGF) 19 has recently emerged as a potential target for treating metabolic disease. Given that skeletal muscle is a key metabolic organ, we explored the role of FGF19 in that tissue. Here we report a novel function of FGF19 in regulating skeletal muscle mass through enlargement of muscle fiber size, and in protecting muscle from atrophy. Treatment with FGF19 causes skeletal muscle hypertrophy in mice, while physiological and pharmacological doses of FGF19 substantially increase the size of human myotubes in vitro...
June 26, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28650415/videolaryngoscopy-versus-fiber-optic-intubation-through-a-supraglottic-airway-in-children-with-a-difficult-airway-an-analysis-from-the-multicenter-pediatric-difficult-intubation-registry
#7
Nicholas E Burjek, Akira Nishisaki, John E Fiadjoe, H Daniel Adams, Kenneth N Peeples, Vidya T Raman, Patrick N Olomu, Pete G Kovatsis, Narasimhan Jagannathan, Agnes Hunyady, Adrian Bosenberg, See Tham, Daniel Low, Paul Hopkins, Chris Glover, Olutoyin Olutoye, Peter Szmuk, John McCloskey, Nicholas Dalesio, Rahul Koka, Robert Greenberg, Scott Watkins, Vikram Patel, Paul Reynolds, Maria Matuszczak, Ranu Jain, Samia Khalil, David Polaner, Jennifer Zieg, Judit Szolnoki, Kumar Sathyamoorthy, Brad Taicher, N Ricardo Riveros Perez, Solmaletha Bhattacharya, Tarun Bhalla, Paul Stricker, Justin Lockman, Jorge Galvez, Mohamed Rehman, Britta Von Ungern-Sternberg, David Sommerfield, Codruta Soneru, Franklin Chiao, Martina Richtsfeld, Kumar Belani, Lina Sarmiento, Sam Mireles, Guelay Bilen Rosas, Raymond Park, James Peyton
BACKGROUND: The success rates and related complications of various techniques for intubation in children with difficult airways remain unknown. The primary aim of this study is to compare the success rates of fiber-optic intubation via supraglottic airway to videolaryngoscopy in children with difficult airways. Our secondary aim is to compare the complication rates of these techniques. METHODS: Observational data were collected from 14 sites after management of difficult pediatric airways...
June 23, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28650386/corneal-nerve-morphology-and-tear-film-substance-p-in-diabetes
#8
Maria Markoulli, Jingjing You, Juno Kim, Carmen L Duong, Jonathan B Tolentino, Joshua Karras, Edward Lum
PURPOSE: This work aims to characterize the relationship between tear film neuropeptide substance P and the structural integrity of the sub-basal nerve plexus in diabetes. METHODS: Seventeen healthy control participants and nine participants with diabetes were recruited in this cross-sectional study. Total protein content and substance P concentrations were determined in the flush tears of participants. Corneal nerve morphology was assessed by capturing the corneal sub-basal nerve plexus using the Heidelberg Retinal Tomograph II with the Rostock Corneal Module (Heidelberg Engineering GmbH, Heidelberg, Germany) in the central cornea...
July 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28650218/bilateral-surgical-damage-of-the-central-tegmental-tract-resulting-in-bilateral-hypertrophic-olivary-degeneration-an-mri-case-report
#9
Silvia Lana, Chiara Ganazzoli, Girolamo Crisi
Hypertrophic olivary degeneration (HOD) is a rare trans-synaptic neuronal degeneration of the inferior olivary nucleus caused by an injury to the dentato-rubro-olivary connection, also known as Guillain-Mollaret triangle. It leads to hypertrophy of the affected nucleus rather than atrophy and is characterized by hyperintensity on T2-weighted images. Unilateral and bilateral cases are described. We present a case of a 70-year-old patient affected by a tumor inside the fourth ventricle who suffered from diplopia and right seventh cranial nerve palsy...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28650050/bilayered-nanofibrous-3d-hierarchy-as-skin-rudiment-by-emulsion-electrospinning-for-burn-wound-management
#10
Pallabi Pal, Prabhash Dadhich, Pavan Kumar Srivas, Bodhisatwa Das, Dhrubajyoti Maulik, Santanu Dhara
Mimicking skin extracellular matrix hierarchy, the present work aims to develop a bilayer skin graft comprising a porous cotton-wool-like 3D layer with membranous structure of PCL-chitosan nanofibers. Emulsion electrospinning with differential stirring periods of PCL-chitosan emulsion results in development of a bilayer 3D structure with varied morphology. The electrospun membrane has fiber diameter ∼274 nm and pore size ∼1.16 μm while fluffy 3D layer has fiber diameter ∼1.62 μm and pore size ∼62 μm...
June 26, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28649960/gold-nanoparticles-decorated-electrospun-poly-n-vinyl-2-pyrrolidone-nanofibers-with-tunable-size-and-coverage-density-for-nanomolar-detection-of-single-and-binary-component-dyes-by-surface-enhanced-raman-spectroscopy
#11
Alfin Kurniawan, Meng-Jiy Wang
The application of the electrospun nanomaterials to surface-enhanced Raman spectroscopy (SERS) is a rapidly evolving field which holds potential for future developments in the generation of portable plasmonic-based detection platforms. In this study, a simple approach to fabricate electrospun poly(N-vinylpyrrolidone) (PVP) mats decorated with gold nanoparticles (AuNPs) by combining electrospinning and calcination was presented. AuNPs were decorated on the fiber mat surface through electrostatic interactions between positively charged aminosilane groups and negatively charged AuNPs...
June 26, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28649713/mechanistic-modeling-of-the-loss-of-protein-sieving-due-to-internal-and-external-fouling-of-microfilters
#12
Glen R Bolton, Alex J Apostolidis
Fed-batch and perfusion cell culture processes used to produce therapeutic proteins can utilize microfilters for product harvest. In this study, new explicit mathematical models of sieving loss due to internal membrane fouling, external membrane fouling, or a combination of the two were generated. The models accounted for membrane and cake structures and hindered solute transport. Internal membrane fouling was assumed to occur due to the accumulation of foulant on either membrane pore walls (pore-retention model) or membrane fibers (fiber-retention model)...
June 26, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/28649681/bio-inspired-colorful-flexible-defrostable-light-scattering-hybrid-films-for-the-effective-distribution-of-led-light
#13
Seongpil An, Hong Seok Jo, Yong Il Kim, Kyo Yong Song, Min-Woo Kim, Kyu Bum Lee, Alexander L Yarin, Sam S Yoon
Bioluminescent jellyfish has a unique structure derived from fiber/polymer interfaces that is advantageous for effective light scattering in the dark, deep sea water. Herein, we demonstrate the fabrication of bio-inspired hybrid films by mimicry of the jellyfish's structure, leading to excellent light-scattering performance and defrosting capability. A haze value reaching 59.3% and a heating temperature of up to 292 °C were achieved with the films. Accordingly, the developed surface constitutes an attractive optical device for lighting applications, especially for street or vehicle luminaries for freezing Arctic-climate countries...
June 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28649573/supramolecular-self-assembly-of-a-model-hydrogelator-characterization-of-fiber-formation-and-morphology
#14
Yuan Gao, Ryan Nieuwendaal, Emilios K Dimitriadis, Boualem Hammouda, Jack F Douglas, Bing Xu, Ferenc Horkay
Hydrogels are of intense recent interest in connection with biomedical applications ranging from 3-D cell cultures and stem cell differentiation to regenerative medicine, controlled drug delivery and tissue engineering. This prototypical form of soft matter has many emerging material science applications outside the medical field. The physical processes underlying this type of solidification are incompletely understood and this limits design efforts aimed at optimizing these materials for applications. We address this general problem by applying multiple techniques (e...
December 2016: Gels
https://www.readbyqxmd.com/read/28649465/dietary-and-cardio-metabolic-risk-factors-in-patients-with-obstructive-sleep-apnea-cross-sectional-study
#15
Marta Stelmach-Mardas, Marcin Mardas, Khalid Iqbal, Magdalena Kostrzewska, Tomasz Piorunek
BACKGROUND: Little is known about the role of dietary intake in obstructive sleep apnea (OSA), which could prove important in improving clinical outcomes for people with obesity and/or cardiovascular disease within these populations. Reduction in energy intake typically results in weight loss, markedly improving metabolic parameters and ameliorating OSA severity. The aim of this study was to evaluate the association of dietary and cardio-metabolic risk factors with OSA severity. METHODS: This was a cross-sectional study...
2017: PeerJ
https://www.readbyqxmd.com/read/28649346/couch-potatoes-do-better-delayed-dispersal-and-territory-size-affect-the-duration-of-territory-occupancy-in-a-monogamous-mammal
#16
Martin Mayer, Andreas Zedrosser, Frank Rosell
In territorial, socially monogamous species, the establishment and defense of a territory are an important strategy to maximize individual fitness, but the factors responsible for the duration of territory occupancy are rarely studied, especially in long-lived mammals. A long-term monitoring program in southeast Norway spanning over 18 years allowed us to follow the individual life histories of Eurasian beavers (Castor fiber) from adolescence in their natal family group to dispersal and territory establishment until the end of territory occupancy...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28649015/on-command-on-off-switching-of-progenitor-cell-and-cancer-cell-polarized-motility-and-aligned-morphology-via-a-cytocompatible-shape-memory-polymer-scaffold
#17
Jing Wang, Andy Quach, Megan E Brasch, Christopher E Turner, James H Henderson
In vitro biomaterial models have enabled advances in understanding the role of extracellular matrix (ECM) architecture in the control of cell motility and polarity. Most models are, however, static and cannot mimic dynamic aspects of in vivo ECM remodeling and function. To address this limitation, we present an electrospun shape memory polymer scaffold that can change fiber alignment on command under cytocompatible conditions. Cellular response was studied using the human fibrosarcoma cell line HT-1080 and the murine mesenchymal stem cell line C3H/10T1/2...
June 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28649013/online-quantitative-monitoring-of-live-cell-engineered-cartilage-growth-using-diffuse-fiber-optic-raman-spectroscopy
#18
Mads S Bergholt, Michael B Albro, Molly M Stevens
Tissue engineering (TE) has the potential to improve the outcome for patients with osteoarthritis (OA). The successful clinical translation of this technique as part of a therapy requires the ability to measure extracellular matrix (ECM) production of engineered tissues in vitro, in order to ensure quality control and improve the likelihood of tissue survival upon implantation. Conventional techniques for assessing the ECM content of engineered cartilage, such as biochemical assays and histological staining are inherently destructive...
June 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28648759/epha2-and-ephrin-a5-are-not-a-receptor-ligand-pair-in-the-ocular-lens
#19
Catherine Cheng, Velia M Fowler, Xiaohua Gong
Eph-ephrin bidirectional signaling is essential for eye lens transparency in humans and mice. Our previous studies in mouse lenses demonstrate that ephrin-A5 is mainly expressed in the anterior epithelium, where it is required for maintaining the anterior epithelial monolayer. In contrast, EphA2 is localized in equatorial epithelial and fiber cells where it is essential for equatorial epithelial and fiber cell organization and hexagonal cell shape. Immunostaining of lens epithelial and fiber cells reveals that EphA2 and ephrin-A5 are also co-expressed in anterior fiber cell tips, equatorial epithelial cells and newly formed lens fibers, although they are not precisely colocalized...
June 22, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28648721/stability-metrics-for-optic-radiation-tractography-towards-damage-prediction-after-resective-surgery
#20
Stephan Meesters, Pauly Ossenblok, Louis Wagner, Olaf Schijns, Paul Boon, Luc Florack, Anna Vilanova, Remco Duits
BACKGROUND: An accurate delineation of the optic radiation (OR) using diffusion MR tractography may reduce the risk of a visual field deficit after temporal lobe resection. However, tractography is prone to generate spurious streamlines, which deviate strongly from neighboring streamlines and hinder a reliable distance measurement between the temporal pole and the Meyer's loop (ML-TP distance). NEW METHOD: Stability metrics are introduced for the automated removal of spurious streamlines near the Meyer's loop...
June 22, 2017: Journal of Neuroscience Methods
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