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https://www.readbyqxmd.com/read/28821116/active-release-coating-of-multilayer-assembled-branched-and-ionic-%C3%AE-cyclodextrins-onto-poly-ethylene-terephthalate
#1
Leyre Pérez-Álvarez, Leire Ruiz-Rubio, Erlantz Lizundia, Estíbaliz Hernáez, Luis M León, Jose Luis Vilas-Vilela
Branched ionic cyclodextrins multilayers were assembled onto the surface of previously aminolyzed poly(ethylene terephthalate) in order to construct local drug delivery tailored platforms with potential applicability as materials for indwelling medical devices. The construction of the multilayers took place by the alternate deposition of ionic cyclodextrin derivatives and was characterized by surface zeta-potential measurements, X-ray photoelectron spectroscopy and, after fluorescent labeling of anionic branched cyclodextrins, by UV-vis spectroscopy and confocal fluorescence spectroscopy...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821107/relationship-between-multi-scale-structures-and-properties-of-photophobic-films-based-on-hydroxypropyl-methylcellulose-and-monosodium-phosphate
#2
Liang Zhang, Yan Zhao, Jian-Ya Qian, Shan Jiang, Jun Liu, Xiao-Long He
Photophobic (white) films were prepared with hydroxypropyl methylcellulose (HPMC) and monosodium phosphate (NaH2PO4) to overcome the redox reaction induced by titanium dioxide photocatalysis of HPMC/TiO2 white film. What's more, HPMC/NaH2PO4 white film could overcome the drying temperature dependent property of white films based on HPMC and calcium salts. Attenuated total reflection Fourier transform infrared spectroscopy, wide angel X-ray diffraction, small angle X-ray scattering, scanning electron microscope and texture analyzer were used to investigate the effect of NaH2PO4 on the short-range, supra-molecular structures and properties of HPMC film...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821061/morphology-and-mechanical-properties-of-poly-%C3%AE-hydroxybutyrate-poly-%C3%AE%C2%B5-caprolactone-blends-controlled-with-cellulosic-particles
#3
Jianxiang Chen, Yuankun Wang, Zeren Yin, Kam C Tam, Defeng Wu
The rigid microcrystalline cellulose (MCC) particles and semi-rigid ethyl cellulose (EC) were used to control phase morphology and mechanical properties of immiscible poly(β-hydroxybutyrate) (PHB)/poly(ε-caprolactone) (PCL) blends. The interfacial properties were evaluated by the fiber retraction and contact angle methods MCC is incompatible with PHB and PCL, and dispersed independently in the two polymer phases in their blends. However, EC is more compatible with the two polymers, with a higher affinity for PCL...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821043/effect-of-moderate-electric-fields-in-the-properties-of-starch-and-chitosan-films-reinforced-with-microcrystalline-cellulose
#4
Caroline C S Coelho, Miguel A Cerqueira, Ricardo N Pereira, Lorenzo M Pastrana, Otniel Freitas-Silva, António A Vicente, Lourdes M C Cabral, José A Teixeira
Microcrystalline cellulose (MCC) can provide improved properties when the aim is the development of biodegradable packaging materials. In this work the physicochemical properties of polysaccharide-based films (chitosan and starch) with the incorporation of MCC and the application of moderate electric field (MEF) and ultrasonic bath (UB) as treatments, were evaluated. For each treatment, the thickness, moisture content, solubility, water vapor permeability, contact angle, mechanical properties, along with its color and opacity were determined...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821040/characteristics-of-a-free-standing-film-from-banana-pseudostem-nanocellulose-generated-from-tempo-mediated-oxidation
#5
R H Fitri Faradilla, George Lee, Ji-Youn Arns, Justine Roberts, Penny Martens, Martina H Stenzel, Jayashree Arcot
Demand for bioplastic, especially for food packaging, increases as the consumers become more aware of the destructive effect of non-biodegradable plastics. Nanocellulose from banana pseudo-stem has great potential to be formed as a bioplastic. This study aimed to characterize the free-standing film produced from banana pseudo-stem nanocellulose that was prepared by TEMPO-mediated oxidation. The film was found containing calcium oxalate crystals, which most likely influenced the film transparency and possibly affected the contact angle and tensile strength...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820949/association-between-patient-factors-and-outcome-of-synthetic-cartilage-implant-hemiarthroplasty-vs-first-metatarsophalangeal-joint-arthrodesis-in-advanced-hallux-rigidus
#6
Andy Goldberg, Dishan Singh, Mark Glazebrook, Chris M Blundell, Gwyneth De Vries, Ian L D Le, Dominic Nielsen, M Elizabeth Pedersen, Anthony Sakellariou, Matthew Solan, Alastair S E Younger, Timothy R Daniels, Judith F Baumhauer
BACKGROUND: We evaluated data from a clinical trial of first metatarsophalangeal joint (MTPJ1) implant hemiarthroplasty and arthrodesis to determine the association between patient factors and clinical outcomes. METHODS: Patients ≥18 years with hallux rigidus grade 2, 3, or 4 were treated with synthetic cartilage implant MTPJ1 hemiarthroplasty or arthrodesis. Pain visual analog scale (VAS), Foot and Ankle Ability Measure (FAAM) sports and activities of daily living (ADL) scores, and Short Form-36 Physical Function (SF-36 PF) subscore were obtained preoperatively, and at 2, 6, 12, 24, 52, and 104 weeks postoperatively...
August 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28820920/presumed-solar-retinopathy-in-child-with-juvenile-open-angle-glaucoma
#7
Ta C Chang, Kara M Cavuoto
No abstract text is available yet for this article.
August 18, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28820843/cephalometric-predictors-of-clinical-severity-in-treacher-collins-syndrome
#8
Elcin Esenlik, Natalie M Plana, Barry H Grayson, Roberto L Flores
BACKGROUND: The aim of this study is to identify cephalometric measurements associated with clinical severity in patients with Treacher Collins Syndrome (TCS). METHODS: A retrospective single-institutional review of patients with TCS was conducted. Pre-operative cephalograms and computed tomography scans (n=30) were evaluated. 50 cephalometric measurements were compared to age-specific normative data using ANOVA. These cephalometric measurements and the patient's Pruzansky classification were correlated to clinical severity using Spearman analysis...
August 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28820747/involvement-of-hyperglycemia-in-the-development-of-platelet-procoagulant-response-the-role-of-aldose-reductase-and-platelet-swelling
#9
Tomasz Rusak, Tomasz Misztal, Malgorzata Rusak, Justyna Branska-Januszewska, Marian Tomasiak
: Rise in mean platelet volume (MPV) has been demonstrated to be associated with increased platelet reactivity. In diabetes patients, augmented MPV was proposed to contribute to increased risk of thrombotic complications. Therefore, the aim of this study was to investigate whether under hyperglycemic conditions, aldose reductase (AR)-mediated sorbitol formation and associated rise in cell volume, which subsequently results in platelet hyperactivation. Platelets were obtained from 30 healthy volunteers and 13 patients with diabetes...
September 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28820649/targets-of-neuroprotection-in-glaucoma
#10
Shaoqing He, Dorota L Stankowska, Dorette Z Ellis, Raghu R Krishnamoorthy, Thomas Yorio
Progressive neurodegeneration of the optic nerve and the loss of retinal ganglion cells is a hallmark of glaucoma, the leading cause of irreversible blindness worldwide, with primary open-angle glaucoma (POAG) being the most frequent form of glaucoma in the Western world. While some genetic mutations have been identified for some glaucomas, those associated with POAG are limited and for most POAG patients, the etiology is still unclear. Unfortunately, treatment of this neurodegenerative disease and other retinal degenerative diseases is lacking...
August 18, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28820541/automatic-estimation-of-optimal-deployment-of-transcatheter-aortic-valve-implantation-using-computed-tomography
#11
Arthur Kerner, Sobhi Abadi, Roy Dotan, Marcia Javitt, Doron Aronson, Jonathan Lessick
BACKGROUND: A comparison was made between the accuracy of and time saved by using novel automated software for pre-procedural computed tomography (CT) planning before transcatheter aortic valve implantation (TAVI) and manual methods. Preprocedural CT to assess aortic annulus dimensions and predict the optimal C-arm implant angle before TAVI can reduce complications related to incorrect prosthesis sizing and positioning. METHODS: A total of 61 consecutive patients underwent TAVI using either the SAPIEN XT or CoreValve prosthesis...
March 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28820488/phase-behaviour-and-miscibility-studies-of-collagen-silk-fibroin-macromolecular-system-in-dilute-solutions-and-solid-state
#12
Ima Ghaeli, Mariana A de Moraes, Marisa M Beppu, Katarzyna Lewandowska, Alina Sionkowska, Frederico Ferreira-da-Silva, Maria P Ferraz, Fernando J Monteiro
Miscibility is an important issue in biopolymer blends for analysis of the behavior of polymer pairs through the detection of phase separation and improvement of the mechanical and physical properties of the blend. This study presents the formulation of a stable and one-phase mixture of collagen and regenerated silk fibroin (RSF), with the highest miscibility ratio between these two macromolecules, through inducing electrostatic interactions, using salt ions. For this aim, a ternary phase diagram was experimentally built for the mixtures, based on observations of phase behavior of blend solutions with various ratios...
August 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28820482/in-situ-synthesis-of-silver-nanoparticles-on-the-polyelectrolyte-coated-sericin-pva-film-for-enhanced-antibacterial-application
#13
Rui Cai, Gang Tao, Huawei He, Pengchao Guo, Meirong Yang, Chaoxiang Ding, Hua Zuo, Lingyan Wang, Ping Zhao, Yejing Wang
To develop silk sericin (SS) as a potential antibacterial biomaterial, a novel composite of polyelectrolyte multilayers (PEMs) coated sericin/poly(vinyl alcohol) (SS/PVA) film modified with silver nanoparticles (AgNPs) has been developed using a layer-by-layer assembly technique and ultraviolet-assisted AgNPs synthesis method. Ag ions were enriched by PEMs via the electrostatic attraction between Ag ions and PEMs, and then reduced to AgNPs in situ with the assistance of ultraviolet irradiation. PEMs facilitated the high-density growth of AgNPs and protected the synthesized AgNPs due to the formation of a 3D matrix, and thus endowed SS/PVA film with highly effective and durable antibacterial activity...
August 18, 2017: Materials
https://www.readbyqxmd.com/read/28820301/translabyrinthine-microsurgical-resection-of-small-vestibular-schwannomas
#14
Marc S Schwartz, Gregory P Lekovic, Mia E Miller, William H Slattery, Eric P Wilkinson
OBJECTIVE Translabyrinthine resection is one of a number of treatment options available to patients with vestibular schwannomas. Though this procedure is hearing destructive, the authors have noted excellent clinical outcomes for patients with small tumors. The authors review their experience at a tertiary acoustic neuroma referral center in using the translabyrinthine approach to resect small vestibular schwannomas. All operations were performed by a surgical team consisting of a single neurosurgeon and 1 of 7 neurotologists...
August 18, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28820271/cam-deformities-and-limited-hip-range-of-motion-are-associated-with-early-osteoarthritic-changes-in-adolescent-athletes-a-prospective-matched-cohort-study
#15
Cody C Wyles, Germán A Norambuena, Benjamin M Howe, Dirk R Larson, Bruce A Levy, Brandon J Yuan, Robert T Trousdale, Rafael J Sierra
BACKGROUND: The natural history of femoroacetabular impingement (FAI) remains incompletely understood. In particular, there is limited documentation of joint damage in adolescent patients with limited range of motion (LROM) of the hip, which is commonly associated with FAI. PURPOSE: To evaluate changes in magnetic resonance imaging (MRI), radiographs, and clinical examinations over 5 years in a group of athletes from a wide variety of sports with asymptomatic LROM of the hip compared with matched controls...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28820165/extraocular-needle-guided-haptic-insertion-technique-of-scleral-fixation-intraocular-lens-surgeries-x-nit
#16
Prabu Baskaran, Pratyusha Ganne, Sahil Bhandari, Seema Ramakrishnan, Rengaraj Venkatesh, Prashant Gireesh
The most challenging step in sutureless scleral fixation of intraocular lens (SFIOL) is exteriorization of haptics. The conventional handshake technique has a learning curve since it involves intraocular handing over of haptics from one forceps to another. Here, we describe "extraocular needle-guided haptic insertion technique" (X-NIT), a novel technique of exteriorizing haptics that totally eliminates intraocular manipulations. This method involves sequential introduction of two bent 26-gauge needles through the sclera (pars plicata zone) into the eye which are brought out through a sclerocorneal wound...
August 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28820157/incidence-outcomes-and-risk-factors-for-hemorrhagic-complications-in-eyes-with-polypoidal-choroidal-vasculopathy-following-photodynamic-therapy-in-indian-subjects
#17
Pukhraj Rishi, Ekta Rishi, Minal Sharma, Aditya Maitray, Muna Bhende, Lingam Gopal, Tarun Sharma, Dhanashree Ratra, Parveen Sen, Pramod Bhende, Chetan Rao, Pradeep Susvar
PURPOSE: To evaluate the incidence, outcomes, and risk factors for hemorrhagic complications in eyes with polypoidal choroidal vasculopathy (PCV) following photodynamic therapy (PDT). METHODS: Medical records of 94 eyes of 86 consecutive patients with PCV who underwent PDT between January 2007 and December 2014 were retrospectively reviewed. The diagnosis of PCV was based on clinical features and indocyanine green angiography. Eyes were treated with PDT monotherapy or a combination of PDT plus anti-vascular endothelial growth factor...
August 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28820156/viscoelastic-augmented-trabeculectomy-a-newer-concept
#18
Meghna Solanki, Ankur Kumar, Anubhav Upadhyay, Kishor Kumar
PURPOSE: Comparison of conventional trabeculectomy (CT) and viscoelastic-augmented trabeculectomy (VAT) in primary open-angle glaucoma. METHODS: A total of 65 primary open-angle glaucoma cases were taken for each of the two groups, i.e., CT and VAT. Viscoelastic-augmented trabeculectomy constituted lamellar scleral flap, deep scleral flap, penetrating trabeculectomy, peripheral iridectomy, filling of the anterior chamber with viscoelastic (sodium hyaluronate) and balanced salt solution, movement of visco in bleb, and tight flap closure...
August 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28820012/effect-of-rotational-prosthetic-alignment-variation-on-tibiofemoral-contact-pressure-distribution-and-joint-kinematics-in-total-knee-replacement
#19
Xin Xie, Roy Rusly, John D DesJardins, Frank Voss, Kim Chillag, Martine LaBerge
In total knee replacement surgery, implant alignment is one of the most important criteria for successful long-term clinical outcome. During total knee replacement implantation, femoral and tibial alignment are determined through appropriate bone resections, which could vary based on patient anatomy, implant design and surgical technique and further influence loading conditions and clinical outcomes. The current research focused on three critical alignment parameters for total knee replacement insertion: femoral component internal/external (I/E) rotation, varus-valgus tibiofemoral angulation and posterior tibial slope...
August 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28819985/prediction-of-labor-outcome-using-serial-transperineal-ultrasound-in-the-first-stage-of-labor
#20
Chung Ming Chor, Liona Chiu Yee Poon, Tak Yeung Leung
OBJECTIVE: To evaluate the feasibility of predicting labor outcome using serial transperineal ultrasound (TPU) in the early active phase of labor. METHODS: This is a single center prospective observational study in a tertiary obstetrics unit in Hong Kong. Nulliparous women carrying singleton pregnancy at the onset of active phase of labor were recruited. Serial 3D volumes by TPU were acquired and then repeated after 1 and 2 hours, which were subsequently analyzed for fetal head symphyseal distance (HSD), angle of progression (AoP) and fetal head progression distance (PD)...
August 18, 2017: Journal of Maternal-fetal & Neonatal Medicine
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