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https://www.readbyqxmd.com/read/28078889/quantification-of-free-polyelectrolytes-present-in-colloidal-suspension-revealing-a-source-of-toxic-responses-for-polyelectrolyte-wrapped-gold-nanoparticles
#1
Tian A Qiu, Marco D Torelli, Ariane M Vartanian, Nathan B Rackstraw, Joseph T Buchman, Lisa M Jacob, Catherine J Murphy, Robert J Hamers, Christy L Haynes
Polyelectrolyte (PE) wrapping of colloidal nanoparticles (NPs) is a standard method to control NP surface chemistry and charge. Because excess polyelectrolytes are usually employed in the surface modification process, it is critical to evaluate different purification strategies to obtain a clean final product and thus avoid ambiguities in the source of effects on biological systems. In this work, 4 nm diameter gold nanoparticles (AuNPs) were wrapped with 15 kDa poly(allylamine hydrochloride) (PAH), and three purification strategies were applied: (a) diafiltration or either (b) one round or (c) two rounds of centrifugation...
January 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28078355/-compression-therapy-of-venous-leg-ulcers-in-the-decongestion-phase
#2
REVIEW
J Dissemond, S Eder, S Läuchli, H Partsch, M Stücker, W Vanscheidt
Compression therapy is the basis for successful treatment in most patients with venous leg ulcers. Concerning compression therapy, the initial phase of decongestion and the following phase of maintenance should be differentiated. While in the maintenance phase (ulcer) stocking systems are now frequently recommended, in the decongestion phase compression bandages are mostly still used, which however are often inappropriately applied. In German-speaking countries, compression therapy with short-stretch bandages has a long tradition...
January 11, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/28077564/blend4php-a-php-api-for-galaxy
#3
Connor Wytko, Brian Soto, Stephen P Ficklin
Galaxy is a popular framework for execution of complex analytical pipelines typically for large data sets, and is a commonly used for (but not limited to) genomic, genetic and related biological analysis. It provides a web front-end and integrates with high performance computing resources. Here we report the development of the blend4php library that wraps Galaxy's RESTful API into a PHP-based library. PHP-based web applications can use blend4php to automate execution, monitoring and management of a remote Galaxy server, including its users, workflows, jobs and more...
2017: Database: the Journal of Biological Databases and Curation
https://www.readbyqxmd.com/read/28075593/formation-of-nickel-clusters-wrapped-in-carbon-cages-towards-new-endohedral-metallofullerene-synthesis
#4
Alexander S Sinitsa, Thomas W Chamberlain, Thilo Zoberbier, Irina V Lebedeva, Andrey M Popov, Andrey A Knizhnik, Robert L McSweeney, Johannes Biskupek, Ute Kaiser, Andrei N Khlobystov
In spite of the high potential of endohedral metallofullerenes (EMFs) for application in biology, medicine and molecular electronics and recent efforts in EMF synthesis, the variety of EMFs accessible by conventional synthetic methods remains limited and does not include, for example, EMFs of late transition metals. We propose a method in which EMF formation is initiated by electron irradiation in aberration-corrected high-resolution transmission electron spectroscopy (AC-HRTEM) of a metal cluster surrounded by amorphous carbon inside a carbon nanotube serving as a nano-reactor and apply this method for synthesis of nickel EMFs...
January 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/28069513/structure-and-mechanical-implications-of-the-pectoral-fin-skeleton-in-the-longnose-skate-chondrichthyes-batoidea
#5
Wei Huang, Watcharapong Hongjamrassilp, Jae-Young Jung, Philip A Hastings, Vlado A Lubarda, Joanna McKittrick
Animal propulsion systems are believed to show high energy and mechanical efficiency in assisting movement compared to artificial designs. As an example, batoid fishes have very light cartilaginous skeletons that facilitate their elegant swimming via enlarged wing-like pectoral fins. The aim of this work is to illustrate the hierarchical structure of the pectoral fin of a representative batoid, the Longnose Skate (Raja rhina), and explain the mechanical implications of its structural design. At the macro level, the pectoral fins are comprised of radially oriented fin rays, formed by staggered mineralized skeletal elements stacked end-to-end...
January 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28069189/ultrasound-treated-potato-peel-and-sweet-lime-pomace-based-biopolymer-film-development
#6
Purba Prasad Borah, Pulak Das, Laxmikant S Badwaik
Treatment and management of food processing waste is a major challenge for food industry. Potato processing industry generates tremendous amount of peel and consider it as zero valued waste. Again, pomace generated after juice extraction from sweet lime pulp is considered as waste and not properly utilized. Whereas these waste could be utilized for the development of biodegradable packaging film to overcome environmental issues. Composite films were prepared with varying proportion of potato peel powder (PP) and sweet lime pomace (SLP) in the ratio of 0:1(A), 0...
May 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28067211/gan-nanowire-arrays-with-nonpolar-sidewalls-for-vertically-integrated-field-effect-transistors
#7
Feng Yu, Shengbo Yao, Friedhard Römer, Bernd Witzigmann, Tilman Schimpke, Martin Strassburg, Andrey Bakin, Hans Schumacher, Erwin Peiner, Hutomo Suryo Wasisto, Andreas Waag
Vertically aligned GaN nanowire (NW) arrays have attracted a lot of attention because of their potential for novel devices in the fields of optoelectronics and nanoelectronics. In this work, GaN NW arrays have been designed and fabricated by combining suitable nanomachining processes including dry and wet etching. After inductively coupled plasma (ICP) dry reactive ion etching (RIE), the GaN NWs are subsequently treated in wet chemical etching using AZ400K developer (i.e., with an activation energy of 0.69 �� 0...
January 9, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28064482/temperature-tuned-faceting-and-shape-changes-in-liquid-alkane-droplets
#8
Shani Guttman, Zvi Sapir, Benjamin M Ocko, Moshe Deutsch, Eli Sloutskin
Recent extensive studies reveal that surfactant-stabilized spherical alkane emulsion droplets spontaneously adopt polyhedral shapes upon cooling below a temperature Td, while still remaining liquid. Further cooling induces growth of tails and spontaneous droplet splitting. Two mechanisms were offered to account for these intriguing effects. One assigns the effects to the formation of an intra-droplet frame of tubules, consisting of crystalline rotator phases with cylindrically curved lattice planes. The second assigns the sphere-to-polyhedron transition to the buckling of defects in a crystalline interfacial monolayer, known to form in these systems at some Ts > Td...
January 9, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28064093/hybrid-nano-composites-made-of-ss-dna-wrapped-carbon-nanotubes-and-titania
#9
Martina Romio, Camillo La Mesa
Multi-walled carbon nanotubes, MWCNTs, are stabilized thanks to the surface wrapping of single-strand DNA, ss-DNA; the resulting adducts are kinetically and thermodynamically stable Such entities build up nano-hybrids with titania, TiO2, nano-particles, in presence of surfactant as an adjuvant. The conditions leading to TiO2 adsorption onto ss-DNA/CNTs were investigated, by optimizing the concentration of adducts, nano-particles (NPs), and of the cationic surfactant (CTAB). Controlling the working conditions makes possible to get homogeneously organized hybrids...
December 24, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28060245/the-hook-and-release-technique-during-enucleation-surgery
#10
David R Jordan, Bazil Stoica, Jonathan J Dutton
PURPOSE: To describe the results and potential benefit of direct muscle release from the globe during enucleation surgery without identifying sutures in the rectus muscle insertion sites, a technique referred to as the hook and release technique. METHODS: Single center, retrospective chart review of patients who underwent enucleation with direct removal of the rectus muscles without identifying sutures in their insertion sites between January 2011 and September 2015 was carried out...
January 5, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28057996/a-case-report-on-buccal-mucosa-graft-for-upper-ureteral-stricture-repair
#11
Vilas Pandurang Sabale, Naveen Thakur, Sharad Kumar Kankalia, Vikram Pramod Satav
Management of ureteric stricture especially long length upper one-third poses a challenging job for most urologists. With the successful use of buccal mucosa graft (BMG) for stricture urethra leads the foundation for its use in ureteric stricture also. A 35-year-old male diagnosedcase of left upper ureteric stricture, postureteroscopy with left percutaneous nephrostomy (PCN) in situ. Cysto-retrograde pyelography and nephrostogram done simultaneously suggestive of left upper ureteric stricture of 3 cm at L3 level...
October 2016: Urology Annals
https://www.readbyqxmd.com/read/28057526/even-with-rehydration-preservation-in-ethanol-influences-the-mechanical-properties-of-bone-and-how-bone-responds-to-experimental-manipulation
#12
Evan O Vesper, Max A Hammond, Matthew R Allen, Joseph M Wallace
Typically, bones are harvested at the time of animal euthanasia and stored until mechanical testing. However, storage methods are not standardized, and differential effects on mechanical properties are possible between methods. The goal of this study was to investigate the effects that two common preservation methods (freezing wrapped in saline-soaked gauze and refrigerating ethanol fixed samples) have on bone mechanical properties in the context of an in vitro ribosylation treatment designed to modify mechanical integrity...
January 3, 2017: Bone
https://www.readbyqxmd.com/read/28057169/difference-in-the-dissolution-behaviors-of-tablets-containing-polyvinylpolypyrrolidone-pvpp-depending-on-pharmaceutical-formulation-after-storage-under-high-temperature-and-humid-conditions
#13
Yoh Takekuma, Haruka Ishizaka, Masato Sumi, Yuki Sato, Mitsuru Sugawara
PURPOSE: Storage under high temperature and humid conditions has been reported to decrease the dissolution rate for some kinds of tablets containing polyvinylpolypyrrolidone (PVPP) as a disintegrant. The aim of this study was to elucidate the properties of pharmaceutical formulations with PVPP that cause a decrease in the dissolution rate after storage under high temperature and humid conditions by using model tablets with a simple composition. METHODS: Model tablets, which consisted of rosuvastatin calcium or 5 simple structure compounds, salicylic acid, 2-aminodiphenylmethane, 2-aminobiphenyl, 2-(p-tolyl)benzoic acid or 4...
October 2016: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28054751/the-prevention-of-pancreatic-fistula-using-polyethylene-glycolic-acid-mesh-reinforcement-around-pancreatojejunostomy-the-propensity-score-matched-analysis
#14
Jae Seung Kang, Youngmin Han, Hongbeom Kim, Wooil Kwon, Sun-Whe Kim, Jin-Young Jang
BACKGROUND/PURPOSE: Several small-scale studies have shown that wrapping polyethylene glycolic acid (PGA) mesh around the anastomotic site reinforced pancreaticojejunostomy following pancreatoduodenectomy (PD) with favorable outcomes. This study investigated the efficacy of PGA mesh for reducing postoperative pancreatic fistula (POPF) and evaluated other risk factors for POPF. METHODS: This study enrolled 464 consecutive patients who underwent PD performed by one surgeon between 2006 and 2015, including a PGA group of 281 patients (60...
January 5, 2017: Journal of Hepato-biliary-pancreatic Sciences
https://www.readbyqxmd.com/read/28054654/aminophylline-suppresses-stress-induced-visceral-hypersensitivity-and-defecation-in-irritable-bowel-syndrome
#15
Teita Asano, Ken-Ichiro Tanaka, Arisa Tada, Hikaru Shimamura, Rikako Tanaka, Hiroki Maruoka, Mitsuko Takenaga, Tohru Mizushima
Pharmacological therapy for irritable bowel syndrome (IBS) has not been established. In order to find candidate drugs for IBS with diarrhea (IBS-D), we screened a compound library of drugs clinically used for their ability to prevent stress-induced defecation and visceral hypersensitivity in rats. We selected the bronchodilator aminophylline from this library. Using a specific inhibitor for each subtype of adenosine receptors (ARs) and phosphodiesterases (PDEs), we found that both A2BARs and PDE4 are probably mediated the inhibitory effect of aminophylline on wrap restraint stress (WRS)-induced defecation...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28051266/one-stage-breast-reconstruction-techniques-in-elderly-patients-to-preserve-quality-of-life
#16
M Maruccia, M Mazzocchi, L A Dessy, M G Onesti
OBJECTIVE: The aim of this study was to review one-stage breast reconstruction techniques performed in elderly patients at our institution to identify the criteria of selection of each in terms of outcomes and quality of life. PATIENTS AND METHODS: Patients older than 65 years who underwent one-stage breast reconstruction between January 2004 and July 2014 at our hospital were included. Patients and procedure-related data were collected from the medical records...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28050968/simulation-of-scintillation-light-output-in-lyso-scintillators-through-a-full-factorial-design
#17
Francis Loignon-Houle, Mélanie Bergeron, Catherine M Pepin, Serge A Charlebois, Roger Lecomte
Individually coupled scintillation detectors used in positron emission tomography (PET) imaging suffer from important signal losses due to the suboptimal light collection from crystals. As only a fraction of the light is generally extracted from long and thin scintillators, it is important to identify and understand the predominant causes of signal loss in order to eventually recover it. This simulation study investigates the multiple factors affecting the light transport in high-aspect ratio LYSO scintillators wrapped in specular reflectors through a full factorial design...
January 4, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28049660/an-exclusive-cellular-and-molecular-network-governs-intestinal-smooth-muscle-cell-differentiation-in-vertebrates
#18
Dafne Gays, Christopher Hess, Annalisa Camporeale, Ugo Ala, Paolo Provero, Christian Mosimann, Massimo M Santoro
Intestinal smooth muscle cells (iSMCs) are a critical component of the adult gastrointestinal (GI) tract and support intestinal differentiation, peristalsis, and epithelial homeostasis during development. Despite these critical roles, the origin of iSMCs and the mechanisms responsible for their differentiation and function remain fairly unknown in vertebrates. Here, using genetic lineage tracing in zebrafish, we demonstrated that iSMCs arise from the lateral plate mesoderm (LPM) in a stepwise process. Early during organogenesis, LPM cells progressively migrate ventral to the endoderm tube wrapping the developing gut...
January 3, 2017: Development
https://www.readbyqxmd.com/read/28048823/mo-fg-brb-04-debater
#19
J Seibert
: Building on the energy and excitement of Washington DC in a presidential election year, AAPM will host its own Presidential Debate to better understand the views of the AAPM membership! Past presidents of the AAPM, Drs. Bayouth, Hazle, Herman, and Seibert, will debate hot topics in medical physics including issues facing education, professional practice, and the advancement of science. The moderators, Drs. Brock and Stern, will also draw in topics from Point-Counterpoint articles from the Medical Physics Journals...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048763/su-g-brc-10-feasibility-of-a-web-based-monte-carlo-simulation-tool-for-dynamic-electron-arc-radiotherapy-dear
#20
A Rodrigues, D Sawkey, Q Wu
PURPOSE: DEAR is a radiation therapy technique utilizing synchronized motion of gantry and couch during delivery to optimize dose distribution homogeneity and penumbra for treatment of superficial disease. Dose calculation for DEAR is not yet supported by commercial TPSs. The purpose of this study is to demonstrate the feasibility of using a web-based Monte Carlo (MC) simulation tool (VirtuaLinac) to calculate dose distributions for a DEAR delivery. METHODS: MC simulations were run through VirtuaLinac, which is based on the GEANT4 platform...
June 2016: Medical Physics
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