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Yang Wu, Xueyong Li, Xiaowen Shi, Yingfei Zhan, Hu Tu, Yumin Du, Hongbing Deng, Linbin Jiang
When an efficient automated coating machine is used to process layer-by-layer (LBL) deposited nanofibrous mats, it causes an obvious planar effect on the surface of the mats, which can be eliminated through ultimate immersion. During this process, chitosan (CS) - rectorite (REC) intercalated composite films are built on the surface of cellulose acetate (CA) nanofibrous mats by a coating machine. Then, the immersion process is utilized to allow positively charged CS or CS-REC intercalated composites to uniformly assemble on the surface of negatively charged CA nanofibers...
October 17, 2016: Colloids and Surfaces. B, Biointerfaces
Tahereh Zargar, Taghi Khayamian, Mohammad T Jafari
A selective thin-film microextraction based on aptamer immobilized on cellulose paper was used as a paper spray ionization source for ion mobility spectrometry (PSI-IMS), for the first time. In this method, the paper is not only used as an ionization source but also it is utilized for the selective extraction of analyte, based on immobilized aptamer. This combination integrates both sample preparation and analyte ionization in a Whatman paper. To that end, an appropriate sample introduction system with a novel design was constructed for the paper spray ionization source...
October 17, 2016: Journal of Pharmaceutical and Biomedical Analysis
Allison L Clouthier, Eric R Bohm, John F Rudan, Barbara L Shay, Michael J Rainbow, Kevin J Deluzio
Multicentre studies are rare in three dimensional motion analyses due to challenges associated with combining waveform data from different centres. Principal component analysis (PCA) is a statistical technique that can be used to quantify variability in waveform data and identify group differences. A correction technique based on PCA is proposed that can be used in post processing to remove nuisance variation introduced by the differences between centres. Using this technique, the waveform bias that exists between the two datasets is corrected such that the means agree...
October 13, 2016: Gait & Posture
Yanin Suwan, Sunpong Jiamsawad, Wasu Supakontanasan, Chaiwat Teekhasaenee
BACKGROUND: To evaluate the mechanisms of acute angle-closure (AAC) other than the pupillary block using ultrasound biomicroscopy DESIGN: Retrospective chart review. PARTICIPANTS: All patients who were diagnosed with AAC in Ramathibodi Hospital, Bangkok, Thailand, between June 2011 and February 2015 were enrolled. METHODS: 72 patients who were diagnosed with AAC underwent a detailed ocular examination. The diagnosed mechanism of AAC was confirmed by UBM and ocular biometry...
October 22, 2016: Clinical & Experimental Ophthalmology
Dawei Song, Bin Meng, Guangdong Chen, Junjie Niu, Weimin Jiang, Zongping Luo, Huilin Yang
PURPOSE: To explore the efficacy of secondary balloon kyphoplasty (BKP) for new vertebral compression fracture (NVCF) of previously non-fractured, non-treated vertebrae after previous BKP and to compare the therapeutic effect between patients with single-level adjacent NVCF and remote NVCF. METHODS: We retrospectively studied patients with single-level NVCF after initial BKP in our hospital from January 2007 to August 2014. The mean follow-up time from secondary BKP was 13...
October 21, 2016: European Spine Journal
Alexey N Boychuk, Dmitriy V Makarov, Alexander N Zakhlevnykh
We theoretically study the dynamics of the orientational structure of a ferronematic liquid crystal with soft planar coupling between the director and the magnetization in a rotating magnetic field. We determine critical parameters characterizing the boundary between synchronous and asynchronous rotation regimes. We show that the magnetic impurity increases the stability threshold of an asynchronous rotation regime. The critical angular velocity, the angles of the director and the magnetization rotation in each regime of orientational structure rotation are found for rigid planar coupling...
October 2016: European Physical Journal. E, Soft Matter
Enrique Gonzalez-Díaz, Camino Fernández Fernández, Maria Jose Fernández Galguera, Alfonso Fernández Corona
INTRODUCTION AND HYPOTHESIS: The aim of this study was to describe perineum deformation during the final part of delivery and suggest a modification of the episiotomy cut to increase accuracy for obtaining a suitable angle (45°) for surgical wound suture. METHODS: This prospective study enrolled 45 primiparous women. The perineum at rest was marked with five lines (0°, 30°, 45°, 60°, 90°), and each line was marked with two dots (point A-B: to 2-3 cm from initial point in fourchette, respectively)...
October 21, 2016: International Urogynecology Journal
Jasper Stevens, Kenneth Meijer, Wouter Bijnens, Mathijs C H W Fuchs, Lodewijk W van Rhijn, Joris P S Hermus, Sander van Hoeve, Martijn Poeze, Adhiambo M Witlox
BACKGROUND: Arthrodesis of the first metatarsophalangeal (MTP1) joint is an intervention often used in patients with severe MTP1 joint osteoarthritis and relieves pain in approximately 80% of these patients. The kinematic effects and compensatory mechanism of the foot for restoring a more normal gait pattern after this intervention are unknown. The aim of this study was to clarify this compensatory mechanism, in which it was hypothesized that the hindfoot and forefoot would be responsible for compensation after an arthrodesis of the MTP1 joint...
October 21, 2016: Foot & Ankle International
Na Jin Seo, Mojtaba F Fathi, Pilwon Hur, Vincent Crocher
STUDY DESIGN: Repeated measures. INTRODUCTION: The Kinect (Microsoft, Redmond, WA) is widely used for telerehabilitation applications including rehabilitation games and assessment. PURPOSE OF THE STUDY: To determine effects of the Kinect location relative to a person on measurement accuracy of upper limb joint angles. METHODS: Kinect error was computed as difference in the upper limb joint range of motion (ROM) during target reaching motion, from the Kinect vs 3D Investigator Motion Capture System (NDI, Waterloo, Ontario, Canada), and compared across 9 Kinect locations...
October 18, 2016: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
Marion Marrel, Ulla Jörn Good, Miriam Marks, Daniel B Herren, Jörg Goldhahn
STUDY DESIGN: Bench research-biomechanical study. INTRODUCTION: Static progressive orthotic devices are efficient in treating contractures. However, current outriggers are unable to keep force transmission and the force application angle (FAA) constant. PURPOSE OF THE STUDY: To evaluate the biomechanical performance of the Isoforce outrigger, a novel extension orthosis. METHODS: A hand model was used to measure the required force at the outrigger and FAA, while simulating resolution of different contracture angles...
October 18, 2016: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
F Li, H-T Wang, Y-Y Chen, W-L Wu, J-Y Liu, J-S Hao, D-Y Luo
This study was performed to investigate the incidence of and risk factors for postoperative cleft relapse and oronasal fistula after Furlow palatoplasty in infants. Sixty-two infants with cleft palate, aged 6-12 months (mean 8.25 months), who underwent cleft repair by Furlow double opposing Z-plasty between March 2012 and August 2014, were enrolled in the study. Risk factors for postoperative cleft relapse and oronasal fistula after Furlow palatoplasty were identified by logistic regression analysis. The incidence rates of cleft relapse at 1 week and oronasal fistula at 3 months after surgery were 24...
October 18, 2016: International Journal of Oral and Maxillofacial Surgery
Gauthier Desuter, Sylvie Henrard, Julie T Van Lith-Bijl, Avigaëlle Amory, Thierry Duprez, Peter Paul van Benthem, Elisabeth Sjögren
OBJECTIVE: This study aimed to determine whether the shape of the thyroid cartilage and gender influence voice outcomes after a Montgomery thyroplasty implant system (MTIS). METHODS: A retrospective cohort study was performed on 20 consecutive patients who underwent MTIS. Voice outcome variables were the relative decrease in Voice Handicap Index (%) and the absolute increase in maximum phonation time (MPT) (in seconds). Material variables were the angle between the thyroid cartilage laminae (α-angle), the size of the prosthesis, and a combination of both (the α-ratio)...
October 18, 2016: Journal of Voice: Official Journal of the Voice Foundation
Min Hee Suh, Linda M Zangwill, Patricia Isabel C Manalastas, Akram Belghith, Adeleh Yarmohammadi, Felipe A Medeiros, Alberto Diniz-Filho, Luke J Saunders, Robert N Weinreb
PURPOSE: To investigate factors associated with dropout of the parapapillary deep retinal layer microvasculature assessed by optical coherence tomography angiography (OCTA) in glaucomatous eyes. DESIGN: Cross-sectional study. PARTICIPANTS: Seventy-one eyes from 71 primary open-angle glaucoma (POAG) patients with β-zone parapapillary atrophy (βPPA) enrolled in the Diagnostic Innovations in Glaucoma Study. METHODS: Parapapillary deep-layer microvasculature dropout was defined as a complete loss of the microvasculature located within the deep retinal layer of the βPPA from OCTA-derived optic nerve head vessel density maps by standardized qualitative assessment...
October 18, 2016: Ophthalmology
So Goto, Naoyuki Maeda, Shizuka Koh, Kazuhiko Ohnuma, Kenichi Hayashi, Ikko Iehisa, Toru Noda, Kohji Nishida
PURPOSE: To evaluate the accuracy of a new formula for predicting postoperative anterior chamber depth (ACD) with preoperative angle-to-angle (ATA) depth using anterior segment (AS) optical coherence tomography (OCT) and to compare it with established methods. DESIGN: Retrospective consecutive case series. PARTICIPANTS: Three hundred four eyes (276 patients) implanted with acrylic intraocular lenses (IOLs) were divided randomly into a training set (152 eyes) and a validation set (152 eyes)...
October 18, 2016: Ophthalmology
Dongping Yu, Zhimou Guo, Aijin Shen, Jingyu Yan, Xuefang Dong, Gaowa Jin, Zhen Long, Lina Liang, Xinmiao Liang
Zwitterionic polymer stationary phases have attracted increasing attention in hydrophilic interaction chromatography (HILIC). In this work, a zwitterionic sulfobetaine functionalized polyacrylamide stationary phase (named TENS) based on porous silica particles was prepared via controlled surface initiated reversible addition-fragmentation transfer (RAFT) polymerization. Instead of traditional methacrylate type sulfobetaine monomer, acrylamide type sulfobetaine monomer, which has higher chemical stability and hydrophicility, was employed in this work...
December 1, 2016: Talanta
Qiaohui Luo, Neng Yu, Chunfei Shi, Xiaoping Wang, Jianmin Wu
A surface plasmon resonance (SPR) sensor combined with nanoscale molecularly imprinted polymer (MIP) film as recognition element was developed for selective detection of the antibiotic ciprofloxacin (CIP). The MIP film on SPR sensor chip was prepared by in situ photo-initiated polymerization method which has the advantages of short polymerization time, controllable thickness and good uniformity. The surface wettability and thickness of MIP film on SPR sensor chip were characterized by static contact angle measurement and stylus profiler...
December 1, 2016: Talanta
A D Surowka, M Töpperwien, M Bernhardt, J D Nicolas, M Osterhoff, T Salditt, D Adamek, M Szczerbowska-Boruchowska
Human dopaminergic system in general, and substantia nigra (SN) neurons, in particular, are implicated in the pathologies underlying the human brain aging. The interplay between aberrations in the structural organization and elemental composition of SN neuron bodies has recently gained in importance as selected metals: Fe, Cu, Zn, Ca were found to trigger oxidative-stress-mediated aberration in their molecular assembly due to concomitant protein (alpha-synuclein, tau-protein) aggregation, gliosis and finally oxidative stress...
December 1, 2016: Talanta
Xinbo Gao, Wenbin Huang, Wei Wang, Minwen Zhou, Jiawei Wang, Shaolin Du, Shida Chen, Xiulan Zhang
OBJECTIVE: To characterize and compare the topographic profile of choroid in eyes after acute primary angle-closure (APAC) and in normal controls. DESIGN, SETTING, AND PARTICIPANTS: A prospective observational study was conducted. Forty-four consecutive patients who had experienced unilateral APAC that was resolved by treatment were recruited. Seventy age- and sex-matched normal individuals were recruited as controls. METHODS: Enhanced depth imaging-optical coherence tomography was used to measure choroidal thickness (CT) in 9 diffuse locations of macular region...
October 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
Itsuko Tsukimura, Hideki Murakami, Makoto Sasaki, Hirooki Endo, Daisuke Yamabe, Ryosuke Oikawa, Minoru Doita
The safety of metallic spinal implants in magnetic resonance imaging (MRI) performed using ultrahigh fields has not been established. Hence, we examined whether the displacement forces caused by a static magnetic field and the heating induced by radiofrequency radiation are substantial for spinal implants in a 7 T field. We investigated spinal rods of various lengths and materials, a screw, and a cross-linking bridge in accordance with the American Society for Testing and Materials guidelines. The displacement forces of the metallic implants in static 7 T and 3 T static magnetic fields were measured and compared...
October 21, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Jae Hoon Lee, Duke Whan Chung, Jong Hun Baek, Young Jun Kim, So Young Park
Background Although proximal fibular flaps have been widely applied in wrist arthroplasty, controversy remains regarding which side of the proximal fibula is better for reconstruction of the distal radius. If the articular surface of the proximal fibula shows dorsal tilting, the ipsilateral (right) proximal fibula should be harvested in right wrist arthroplasty because the articular surface of the distal radius normally has volar tilt. This study investigated anatomical similarities between the proximal fibular articular surface and the distal radius articular surface based on morphologic analysis of the proximal fibula using computed tomography (CT)...
October 21, 2016: Journal of Reconstructive Microsurgery
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