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https://www.readbyqxmd.com/read/29923405/self-assembly-of-unconventional-low-molecular-mass-amphiphiles-containing-a-peg-chain
#1
Joykrishna Dey, Rita Ghosh, Rita Das Mahapatra
The design and synthesis of biocompatible surfactants are important for a wide range of applications in cosmetics, personal care products, and nanomedicines. This feature article summarizes our studies over the past 8 years on the design, synthesis, surface activity, and self-assembly of a series of unconventional low-molecular-mass amphiphiles containing poly(ethylene glycol) (PEG) tail or spacer and different ionic or zwitterionic head groups, including carboxylate, sulfonate, and quaternary ammonium salts...
June 20, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29908605/ultrasound-assisted-fabrication-of-a-novel-optode-base-on-a-triazine-based-schiff-base-immobilized-on-teos-for-copper-detection
#2
Zohreh Parsaee, Nima Karachi, Razieh Razavi
This work introduces novel selective and sensitive optical sensor based on a nano sized triazine based Schiff base (H2 L) immbolized on a transparent glass substrate through the sol-gel process to detection of copper (II) ions in aqueous solutions. This sensor can determine the copper (II) in the range of 8.54 × 10-8 -1.0 × 10-5  mol L-1 with a low detection limit of 1.53 × 10-8  mol L-1 . The optimized geometry of H2 L and its copper complex was obtained based on DFT/B3LYP levels of theory with B3LYP/6-311 + G(d,p) and LANL2DZ/6-311 + G(d,p) basis sets respectively...
October 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29884020/modulating-supramolecular-chirality-in-alanine-derived-assemblies-by-multiple-external-stimuli
#3
Fang Wang, Minggao Qin, Ting Peng, Xianhui Tang, Auphedeous Yinme Dang-I, Chuan-Liang Feng
Having control over the supramolecular chirality through multi-external stimulators provides many possibilities in realizing functional chiral materials. Herein, the supramolecular chirality of nanotwists comprising PA centered with 1,4-phenyldicarboxamide bearing two L/D-helicogenic alanine motifs and achiral COOH at each terminus of the alanine arms is modulated by solvent, temperature, and ultrasound. The modulations are mainly due to the hydrogen bonds among gelators and solvent-gelator interactions, resulting in changes of the molecular arrangement and subsequent self-assembled nanostructures...
June 8, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29876514/knowledge-of-endoscopic-ultrasound-delivered-fiducial-composition-and-dimension-necessary-when-planning-proton-beam-radiotherapy
#4
Ferga C Gleeson, Erik J Tryggestad, Nicholas B Remmes, Chris J Beltran, Jon J Kruse, Michael G Haddock, Christopher L Hallemeier, Andrew C Storm, Michael J Levy
Background and study aims : Little consideration has been given to selection of endoscopic ultrasound-guided fiducials for proton radiotherapy and the resulting perturbations in the therapy dose and pattern. Our aim was to assess the impact of perturbations caused by six fiducials of different composition and dimensions in a phantom gel model. Materials and methods:  The phantom was submerged in a water bath and irradiated with a uniform 10 cm × 10 cm field of 119...
June 2018: Endoscopy International Open
https://www.readbyqxmd.com/read/29875935/locating-the-mental-foramen-at-the-bedside-with-point-of-care-ultrasound-imaging
#5
Abdullah Ebrahim Laher, Feroza Motara, Mike Wells
Introduction: Ultrasound guided neuro-anaesthesia is a developing field of interest to clinicians from various disciplines. The objective of this proof of concept study was to explore the ability, ease and rapidity of ultrasonography in locating the mental foramen. Methods: A convenience sample of 100 patients aged 18 years or older, with no known pathology to the mandibular region, that presented to a single urban ED were enrolled. All patients underwent an ultrasound examination on both sides of the face to locate the mental foramina...
2018: Pan African Medical Journal
https://www.readbyqxmd.com/read/29873448/prior-knowledge-snake-segmentation-of-ultrasound-images-denoised-by-j-divergence-anisotropy-diffusion
#6
Jiawen Yan, Bo Pan, Yunfeng Qi, Jin Ben, Yili Fu
BACKGROUND: Applying transrectal ultrasound to robot-assisted laparoscopic radical prostatectomy has attracted attention in recent years, and it is considered as a proper method to provide real-time subsurface anatomic features. A precise registration between the ultrasound equipment and robotic surgical system is necessary, which usually requires a fast and accurate recognition of the registration tool in the ultrasound image. METHODS: Tissue forceps are chosen as the registration tool...
June 6, 2018: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29866632/ultrasound-probe-use-and-reprocessing-results-from-a-national-survey-among-u-s-infection-preventionists
#7
Ruth M Carrico, Stephen Furmanek, Connor English
BACKGROUND: Improper infection prevention practice associated with ultrasound probe use has been linked to increased infection risk, outbreaks, and death. Although guidelines for reprocessing and use of probes exist, it is unclear how extensively these have been adopted in practice. METHODS: Infection preventionists from U.S. health care facilities were surveyed (N = 358). The anonymous survey had 31 multiple choice, sliding scale, and text response questions...
June 1, 2018: American Journal of Infection Control
https://www.readbyqxmd.com/read/29844469/ultrasound-mediated-egf-coated-microbubble-cavitation-in-dressings-for-wound-healing-applications
#8
Ai-Ho Liao, Chi-Ray Hung, Hang-Kang Chen, Chien-Ping Chiang
The feasibility of ultrasound (US) controlled cavitation for transdermal drug delivery (TDD) using gas-filled microbubbles (MBs) has been explored. However, liquid or gel-type MBs is not easy used for TDD. The present study investigated a new treatment model for evaluating the US-mediated liquid-type epidermal growth factor (EGF)-coated lysozyme microbubble (LYMB) cavitation in a wound dressing for enhancing wound healing. The maximum loading efficacy of EGF onto LYMBs was 19.40 ± 0.04%. In terms of the in vitro treatment efficacy, the growth of Staphylococcus aureus was inhibited by 97...
May 29, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29794443/new-imaging-modalities-in-otology
#9
Manohar Bance, Andrzej Zarowski, Robert A Adamson, Jan W Casselman
Despite steady improvements in cross-sectional imaging of the ear, current technologies still have limitations in terms of resolution, diagnosis, functional assessment and safety. In this chapter, state-of-the-art imaging techniques in current clinical practice are presented including cone-beam computerized tomography, non-echo planar imaging magnetic resonance imaging, imaging for labyrinthine hydrops and imaging of the central auditory pathways. Potential future imaging modalities are also presented, including optical coherence tomography (OCT) and high-frequency ultrasound (HFUS) of the ear...
2018: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29791430/ex-vivos-models-to-teaching-therapeutic-endoscopic-ultrasound-t-eus
#10
Everson L A Artifon, Spencer Cheng, Thaisa Nakadomari, Leandro Kashiwagi, Jose Celso Ardengh, Emilio Belmonte, Jose P Otoch
BACKGROUND: Endoscopic ultrasound training has a learning curve greater than the other endoscopic therapeutic techniques. One of the preclinical teaching methods is the use of ex vivo porcine models. AIM: To describe five ex vivo porcine models for training in therapeutic echoendoscopic procedures. MATERIALS AND METHODS: Using porcine digestive tract containing esophagus, stomach, duodenum, spleen, liver and gallbladder, five models for therapeutic echoendoscopy training were described...
January 2018: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/29766523/a-case-of-allergic-contact-dermatitis-caused-by-disperse-blue-dye-in-ultrasound-gel
#11
Karin A Skalina, Manish Ramesh
No abstract text is available yet for this article.
May 15, 2018: Contact Dermatitis
https://www.readbyqxmd.com/read/29736924/effects-of-high-intensity-ultrasound-treatment-on-functional-properties-of-plum-pruni-domesticae-semen-seed-protein-isolate
#12
Feng Xue, Shenyan Wang, Haozhen Liu, Chen Li
BACKGROUND: In order to improve the functional properties of plum seed protein isolate (PSPI), the effects of high-intensity ultrasound (20 kHz) at different levels of power output (200, 400 and 600 W) on the water/oil holding, solubility, emulsifying, foaming, gel, film formation capacity and hydrolysis degrees of PSPI were investigated. RESULTS: Compared with untreated PSPI, ultrasound treatment improved water holding capacity, solubility, emulsifying properties, foaming capacity of PSPI...
May 8, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29733278/design-and-characterization-of-an-acoustically-and-structurally-matched-3-d-printed-model-for-transcranial-ultrasound-imaging
#13
Chen Bai, Meiling Ji, Ayache Bouakaz, Yujin Zong, Mingxi Wan
For investigating human transcranial ultrasound imaging (TUI) through the temporal bone, an intact human skull is needed. Since it is complex and expensive to obtain one, it requires that experiments are performed without excision or abrasion of the skull. Besides, to mimic blood circulation for the vessel target, cellulose tubes generally fit the vessel simulation with straight linear features. These issues, which limit experimental studies, can be overcome by designing a 3-D-printed skull model with acoustic and dimensional properties that match a real skull and a vessel model with curve and bifurcation...
May 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29727758/deliberate-practice-using-validated-metrics-improves-skill-acquisition-in-performance-of-ultrasound-guided-peripheral-nerve-block-in-a-simulated-setting
#14
Osman M A Ahmed, Imran Azher, Anthony G Gallagher, Dara S Breslin, Brian D O'Donnell, George D Shorten
STUDY OBJECTIVES: The aim of this study was to compare the effects of deliberate vs. self-guided practices (both using validated metrics) on the acquisition of needling skills by novice learners. DESIGN: Randomized Controlled Study. SETTING: Simulation lab, Department of Anesthesia, St.Vincent's Hospital, Dublin. SUBJECTS: Eighteen medical students. INTERVENTIONS: Students were assigned to either (i) deliberate practice (n = 10) or (ii) self-guided practice (n = 8) groups...
May 1, 2018: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/29705305/investigation-of-the-visible-light-photocatalytic-activity-of-bivo-4-prepared-by-sol-gel-method-assisted-by-ultrasonication
#15
J P Deebasree, V Maheskumar, B Vidhya
Visible light induced photocatalyst BiVO4 with monoclinic scheelite structure has been synthesised via sol gel method assisted by ultrasonication. The prepared samples were characterised using X-ray diffraction (XRD), scanning electron microscope (SEM), UV-Vis diffused reflectance spectroscopy (DRS) techniques. The photocatalytic efficiency was evaluated by decolourisation of MB under visible light irradiation. The effect of ultrasound output power on the properties of BiVO4 during and after preparation by sol-gel method has been compared with normal agitated sample (As prepared)...
July 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29683200/posterior-wall-punctures-between-long-and-short-axis-techniques-in-a-phantom-intravenous-model
#16
Darien Davda, David Schrift
OBJECTIVES: To determine whether a long-axis, in-plane approach to ultrasound-guided vascular access produces fewer posterior wall punctures than a short-axis, out-of-plane approach when attempted by novices without prior ultrasound-guided procedural experience. METHODS: Participants were randomized to perform either technique on a ballistic gel-based phantom in a randomized controlled trial. They were then crossed over to repeat the experiment using the alternative approach...
April 23, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29680612/water-treatment-mn-tio-2-synthesized-by-ultrasound-with-increased-aromatics-adsorption
#17
M Stucchi, A Elfiad, M Rigamonti, H Khan, D C Boffito
Pharma-products are mostly single or multiple cyclic compounds. They pollute surface water and are persistent in the aquatic ecosystem. When irradiated by UV light, TiO2 catalysts cleave or degrade organic contaminants in water. Removal of organics by photocatalysis results from a synergistic effect of adsorption and photocatalysis. Synthesis of catalysts by ultrasound (US) produces high surface area and porous solids. Here, we synthesized Mn-doped TiO2 with a US-assisted sol-gel method. Compared to the classical synthesis, US increased the BET surface area from 83 m2  g-1 to 90 m2  g-1 in the Mn-TiO2 sample and from 9...
June 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29643620/opioid-free-anesthesia-for-breast-cancer-surgery-an-observational-study
#18
Swagata Tripathy, Satyajit Rath, Suresh Agrawal, P Bhaskar Rao, A Panda, T S Mishra, Sukdev Nayak
Background and Aims: Opioids are associated with postoperative nausea, vomiting, drowsiness, and increased analgesic requirement. A nonopioid anesthesia technique may reduce morbidity, enable day care surgery, and possibly decrease tumor recurrence. We compared opioid-free, nerve block-based anesthesia with opioid-based general anesthesia for breast cancer surgery in a prospective cohort study. Material and Methods: Twenty four adult American Society of Anesthesiologists grade I-III patients posted for modified radical mastectomy (MRM) with axillary dissection were induced with propofol and maintained on isoflurane (0...
January 2018: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/29620705/building-ultrasound-phantoms-with-modified-polyvinyl-chloride-a-comparison-of-needle-insertion-forces-and-sonographic-appearance-with-commercial-and-traditional-simulation-materials
#19
David Frederick Pepley, Cheyenne Cassel Sonntag, Rohan Sunil Prabhu, Mary Alice Yovanoff, David C Han, Scarlett Rae Miller, Jason Zachary Moore
INTRODUCTION: Training using ultrasound phantoms allows for safe introduction to clinical skills and is associated with improved in-hospital performance. Many materials have been used to simulate human tissue in phantoms including commercial manikins, agar, gelatin, and Ballistics Gel; however, phantom tissues could be improved to provide higher-fidelity ultrasound images or tactile sensation. This article describes a novel phantom tissue mixture of a modified polyvinyl chloride (PVC) polymer, mineral oil, and chalk powder and evaluates needle cutting and ultrasonic properties of the modified PVC polymer mixture compared with a variety of phantom tissues...
June 2018: Simulation in Healthcare: Journal of the Society for Simulation in Healthcare
https://www.readbyqxmd.com/read/29611172/prevention-of-in-stent-restenosis-with-endothelial-progenitor-cell-epc-capture-stent-placement-combined-with-regional-epc-transplantation-an-atherosclerotic-rabbit-model
#20
You-Hua Huang, Qiang Xu, Tao Shen, Jian-Ke Li, Jing-Yu Sheng, Hong-Jian Shi
BACKGROUND: Even with drug-eluting stents, the risk of in-stent restenosis (ISR) remains high. The goal of this study was to investigate the use of an endothelial progenitor cell (EPC) capture stent plus regional EPC transplantation to reduce the ISR rate. METHODS: Endothelial progenitor cell capture stents were fabricated using fibrin gel and anti-CD34 plus anti-VEGFR-2 dual antibodies. Twenty male New Zealand white rabbits established as an atherosclerotic model were randomly divided into two groups: group 1 (n = 10), in which EPC capture stents were deployed into the right iliac artery; and group 2 (n = 10), in which sirolimus-eluting stents were placed...
April 3, 2018: Cardiology Journal
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