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https://www.readbyqxmd.com/read/28636168/improved-hemodialysis-with-hemocompatible-polyethersulfone-hollow-fiber-membranes-in-vitro-performance
#1
Surendra Kumar Verma, Akshay Modi, Atul Kumar Singh, Rohit Teotia, Jayesh Bellare
We show that addition of nanozeolite (NZ) and vitamin E D-α-Tocopherol polyethylene glycol succinate (TPGS or T) considerably improves the performance of polyethersulfone (PES or P) hollow fiber membrane (HFM) for hemodialysis. Nanocomposite HFMs were manufactured using PES as a polymer, TPGS as an additive and NZ as a filler to give a composite membrane called PT-NZ. HFMs were spun by dry-wet spinning principle based on liquid-liquid phase separation. TPGS and NZ were successfully incorporated in HFMs, as confirmed by EDX elemental mapping...
June 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28635249/perfluorocarbon-gold-loading-for-non-invasive-in-vivo-assessment-of-bone-fillers-using-19f-magnetic-resonance-imaging-and-computed-tomography
#2
Simone Mastrogiacomo, Weiqiang Dou, Olga Koshkina, Otto C Boerman, John A Jansen, Arend Heerschap, Mangala Srinivas, X Frank Walboomers
Calcium phosphate cement (CPC) is used in bone repair because of its biocompatibility. However, high similarity between CPC and the natural osseous phase results in poor image contrast in most of the available in vivo imaging techniques such as computed tomography (CT) and magnetic resonance imaging (MRI). For accurate identification and localization during and after implantation in vivo, a composition with enhanced image contrast is needed. In this study, we labeled CPC with perfluoro-15-crown-5-ether-loaded (PFCE) poly(latic-co-glycolic acid) nanoparticles (hydrodynamic radius 100 nm) and gold nanoparticles (diameter 40 nm), as 19F MRI and CT contrast agents respectively...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28634301/microbial-glycoside-hydrolases-as-antibiofilm-agents-with-cross-kingdom-activity
#3
Brendan D Snarr, Perrin Baker, Natalie C Bamford, Yukiko Sato, Hong Liu, Mélanie Lehoux, Fabrice N Gravelat, Hanna Ostapska, Shane R Baistrocchi, Robert P Cerone, Elan E Filler, Matthew R Parsek, Scott G Filler, P Lynne Howell, Donald C Sheppard
Galactosaminogalactan and Pel are cationic heteropolysaccharides produced by the opportunistic pathogens Aspergillus fumigatus and Pseudomonas aeruginosa, respectively. These exopolysaccharides both contain 1,4-linked N-acetyl-d-galactosamine and play an important role in biofilm formation by these organisms. Proteins containing glycoside hydrolase domains have recently been identified within the biosynthetic pathway of each exopolysaccharide. Recombinant hydrolase domains from these proteins (Sph3h from A...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28633856/using-of-sonochemically-prepared-sbsi-for-electrospun-nanofibers
#4
M Nowak, T Tański, P Szperlich, W Matysiak, M Kępińska, D Stróż, Ł Bober, B Toroń
A novel polymeric, polyacrylonitrile (PAN) nanofibers containing ferroelectric and semiconducting antimony sulfoiodide (SbSI) have been made by electrospinning. SbSI nanowires, used as the filler, have been prepared sonochemically from antimony sulphide (Sb2S3) and antimony tri-iodide (SbI3) for the first time. Nanocrystalline SbSI has been fabricated in ethanol under ultrasonic irradiation (20kHz, 565W/cm(2)) at 323K within 2h. The products have been characterized by using techniques such as powder X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, high-resolution transmission electron microscopy, selected area electron diffraction and optical diffuse reflection as well as transmission spectroscopy...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28632885/restoring-facial-symmetry-through-non-surgical-cosmetic-procedures-after-permanent-facial-paralxsis-a-case-report
#5
Ali Sahan, Funda Tamer
Facial nerve paralysis can occur due to infection, inflammation, trauma, surgery, and tumors. It leads to facial asymmetry, impaired oral competence, articulation deficits, and psychological problems. Treatment options include physical therapy, static slings, nerve and muscle transfers, blepharoplasty, brow lift, and chemodenervation with botulinum toxin. We report the case of a 66-year-old Caucasian female with permanent facial paralysis following middle ear surgery. The facial asymmetry was treated successfully with botulinum toxin A injection, hyaluronic acid dermal filler injection, and a thread-lift procedure...
June 2017: Acta Dermatovenerologica Alpina, Panonica, et Adriatica
https://www.readbyqxmd.com/read/28632638/fda-authors-publish-articles-on-dermal-filler-materials-injection-methods-and-skin-preparation
#6
K Scott Phillips, Yi Wang
No abstract text is available yet for this article.
June 15, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28629032/effects-of-silane-modified-fillers-on-properties-of-dental-composite-resin
#7
Aysu Aydınoğlu, Afife Binnaz Hazar Yoruç
The effect of silanization on the mechanical, chemical, and physical properties of dental composites was investigated. Silica fillers were obtained from colloidal silica solution, Ludox® HS-40 and they were silanized by using 3-methacryloxypropyl trimethoxysilane (MPTMS) in an acidic media. Mineralogical and chemical structures of unsilanized and silanized fillers were determined by using XRD and FT-IR analyses. The modification of unsilanized/silanized fillers were investigated by performing XPS and TGA analyses...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629028/physicochemical-and-biological-assessment-of-peek-composites-embedding-natural-amorphous-silica-fibers-for-biomedical-applications
#8
Patrícia R Monich, Fernanda V Berti, Luismar M Porto, Bruno Henriques, Antonio P Novaes de Oliveira, Márcio C Fredel, Júlio C M Souza
The main aim of this study was to assess the physicochemical and biological properties of a novel poly(ether ether ketone) (PEEK) composite containing 30%wt natural amorphous silica fibers (NASF). PEEK and NASF powders were previously functionalized by atomization and citric acid in order to enhance adhesion between polymeric matrix and fillers. Then, composites were produced by cold compression molding technique at 350°C for 3h. Materials were characterized by chemical, microstructural, thermophysical, mechanical and cytotoxic analysis...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28628686/off-face-usage-of-poly-l-lactic-acid-for-body-rejuvenation
#9
Ahmad Jabbar, Suleima Arruda, Neil Sadick
<p>Injectable soft-tissue augmentation agents have become popular alternatives to surgical procedures for the aging face and body. In contrast to temporary, space-occupying replacement fillers such as collagen-based and hyaluronic acid products, poly-l-lactic acid (PLLA) has been demonstrated to gradually promotes deposition of collagen via a biostimulatory response, with therapeutic effects lasting approximately two years. In 2004, the FDA approved its use for rejuvenation of facial contours secondary to lipoatrophy associated with antiretroviral therapy for HIV infection...
May 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28628317/controllability-of-polymer-crystal-orientation-using-heterogeneous-nucleation-of-deformed-polymer-loops-grafted-on-two-dimensional-nanofiller
#10
Yijing Nie, Zhouzhou Gu, Qiang Zhou, Ya Wei, Tongfan Hao, Yong Liu, Rongjuan Liu, Zhiping Zhou
Nowadays, it is a research hotspot to realize the controllability of polymer crystal structure in polymer nanocomposites. However, polymer crystals induced by two-dimensional filler always exhibit random orientation, which somewhat limit the improvement of physical properties of polymer materials. In the current paper, dynamic Monte Carlo simulations were performed to explore the methods preparing crystals with uniform orientation. Heterogeneous nucleation of deformed polymer loops grafted on two-dimensional filler can induce the appearance of a special nanohybrid shish-kebab (NHSK) structure, in which the two-dimensional filler acts as "shish" and induces the formation of crystals with uniform orientation...
June 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28623571/erratum-to-co-spray-drying-with-hpmc-as-a-platform-to-improve-direct-compaction-properties-of-various-tablet-fillers
#11
JinZhi Li, LiJie Zhao, Xiao Lin, Lan Shen, Yi Feng
No abstract text is available yet for this article.
June 16, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28621129/a-multiscale-shear-lag-analysis-of-stiffness-enhancement-in-polymer-graphene-nanocomposites
#12
Asanka Weerasinghe, Chang-Tsan Lu, Dimitrios Maroudas, Ashwin Ramasubramaniam
Graphene and other 2D materials are of emerging interest as functional fillers in polymer-matrix composites. In this work, we present a multiscale atomistic-to-continuum approach for modeling interfacial stress transfer in graphene-HDPE nanocomposites. Via detailed characterization of atomic-level stress profiles in sub-micron graphene fillers, we develop a modified shear-lag model for short fillers. A key feature of our approach lies in the correct accounting of stress concentration at the ends of fillers that exhibits a power-law dependence on filler ("flaw") size, determined explicitly from atomistic simulations, without any ad hoc modeling assumptions...
June 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28619575/reduction-of-early-nodules-after-injection-of-hyaluronic-acid-filler
#13
Sang Ju Lee, Joon Seok, Kui Young Park, Beom Joon Kim, Young Koo Kim
No abstract text is available yet for this article.
July 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28618717/the-electrical-properties-of-hybrid-composites-based-on-multiwall-carbon-nanotubes-with-graphite-nanoplatelets
#14
Yulia Perets, Lyudmila Aleksandrovych, Mykola Melnychenko, Oleksandra Lazarenko, Lyudmila Vovchenko, Lyudmila Matzui
In the present work, we have investigated the concentration dependences of electrical conductivity of monopolymer composites with graphite nanoplatelets or multiwall carbon nanotubes and hybrid composites with both multiwall carbon nanotubes and graphite nanoplatelets. The latter filler was added to given systems in content of 0.24 vol%. The content of multiwall carbon nanotubes is varied from 0.03 to 4 vol%. Before incorporation into the epoxy resin, the graphite nanoplatelets were subjected to ultraviolet ozone treatment for 20 min...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28618233/a-simple-and-consecutive-melt-extrusion-method-to-fabricate-thermally-conductive-composites-with-highly-oriented-boron-nitrides
#15
Xiaomeng Zhang, Jiajia Zhang, Lichao Xia, Chunhai Li, Jianfeng Wang, Fang Xu, Xianlong Zhang, Hong Wu, Shaoyun Guo
In the region of thermally conductive polymer composites, forcing anisotropic fillers into the highly oriented structure is the most effective method to improve the thermal conductivity and mechanical properties simultaneously. However, up to now, such highly oriented structure was mainly achieved in low viscosity polymer matrix or solutions. For the purpose of expanding the range of application, in the present work, a new strategy, the consecutive and powerful shear flow field, was applied to introduce highly oriented boron nitride (BN) into high viscosity polymer matrix...
June 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28615811/adipokine-concentrations-in-lipoaspirates-may-have-a-role-in-wound-healing
#16
Christian Herold, Stefan Engeli, Bibiana Beckmann, Peter M Vogt, Hans-Oliver Rennekampff
OBJECTIVES: In addition to its use as a volume filler, fat grafting may have a potential role in wound healing based on the concentration of growth factors in the lipoaspirate. In this study, we compare the quantitative and qualitative concentration of the various growth factors and adipokines using the Shippert or the Coleman techniques to prepare the lipoaspirate. METHODS: We measured leptin, adiponectin and the growth factors, i.e., acidic fibroblast growth factor (aFGF), basic FGF (bFGF), keratinocyte growth factor (KGF), bone morphogenetic protein-2 (BMP-2) and vascular endothelial growth factor (VEGF) by ELISA in solid and liquid fractions obtained with both techniques in human fat obtained with Coleman technique and Shippert technique...
January 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/28615491/enhanced-osteointegration-of-poly-methylmethacrylate-bone-cements-by-incorporating-strontium-containing-borate-bioactive-glass
#17
Xu Cui, Chengcheng Huang, Meng Zhang, Changshun Ruan, Songlin Peng, Li Li, Wenlong Liu, Ting Wang, Bing Li, Wenhai Huang, Mohamed N Rahaman, William W Lu, Haobo Pan
Although poly(methylmethacrylate) (PMMA) cements are widely used in orthopaedics, they have numerous drawbacks. This study aimed to improve their bioactivity and osseointegration by incorporating strontium-containing borate bioactive glass (SrBG) as the reinforcement phase and bioactive filler of PMMA cement. The prepared SrBG/PMMA composite cements showed significantly decreased polymerization temperature when compared with PMMA and retained properties of appropriate setting time and high mechanical strength...
June 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28614968/putty-like-bone-fillers-based-on-cap-ceramics-or-biosilicate%C3%A2-combined-with-carboxymethylcellulose-characterization-optimization-and-evaluation
#18
Paulo R Gabbai-Armelin, Ana Cm Renno, Murilo C Crovace, Angela Mp Magri, Edgar D Zanotto, Oscar Peitl, Sander Cg Leeuwenburgh, John A Jansen, Jeroen Jjp van den Beucken
Calcium phosphates and bioactive glass ceramics have been considered promising biomaterials for use in surgeries. However, their moldability should be further enhanced. We here thereby report the handling, physicochemical features, and morphological characteristics of formulations consisting of carboxymethylcellulose-glycerol and hydroxyapatite-tricalcium phosphate or Biosilicate® particles. We hypothesized that combining either material with carboxymethylcellulose-glycerol would improve handling properties, retaining their bioactivity...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28613905/unexpected-effects-of-activator-molecules-polarity-on-the-electroreological-activity-of-titanium-dioxide-nanopowders
#19
Alexander Viktorovich Agafonov, Olga I Davydova, Anton S Krayev, Olga S Ivanova, Olga L Evdokimova, Tatiana V Gerasimova, Alexander E Baranchikov, Vladimir V Kozik, Vladimir K Ivanov
Titanium dioxide nanoparticles, obtained using the sol-gel method and modified with organic solvents such as acetone, acetonitrile, benzene, diethyl ether, dimethylsulfoxide, toluene and chloroform, were used as the filler of polydimethylsiloxane-based electrorheological fluids. The effect of electric field strength on the shear stress and yield stress of electrorheological fluids was investigated, as well as the spectra of their dielectric relaxation in the frequency range from 25 to 106 Hz. Modification of titanium dioxide by polar molecules was found to enhance the electrorheological effect, as compared with unmodified TiO2, in accordance with the widely accepted concept of polar molecule dominated electrorheological effect (PM-ER)...
June 14, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28613388/self-assembled-polymeric-ionic-liquid-functionalized-cellulose-nano-crystals-constructing-3d-ion-conducting-channels-within-ionic-liquid-based-composite-polymer-electrolytes
#20
Xuan Qing Shi, Qing Xia, Xiao Xiang, Yun Sheng Ye, Yan Hai Peng, Gang Zhi Xue, Lin Xiao Xie, Yiu-Wing Mai
Composite polymeric and ionic liquid (IL) electrolytes are some of the most promising electrolyte systems for safer battery technology. Although much effort has been directed towards enhancing the transport properties of polymer electrolytes (PEs) through nanoscopic modification by incorporating nano-fillers, it is still difficult to construct ideal ion conducting networks. Here, a novel class of three-dimensional self-assembled polymeric ionic liquid (PIL)-functionalized cellulose nano-crystals (CNC) confining ILs in surface-grafted PIL polymer chains, able to form colloidal crystal polymer electrolytes (CCPE), is reported...
June 14, 2017: Chemistry: a European Journal
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