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Search Results: 1 - 10 of 1940 matches for " filler injection "
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Processed Low NOx Fly Ash as a Filler in Plastics  [PDF]
X. Huang, J.Y. Hwang, J.M. Gillis
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2003, DOI: 10.4236/jmmce.2003.21002
Abstract: Fly ash generated from low NOx burners at American Electric Power's Glen Lyn facility was beneficiated to remove residual carbon, magnetic particles, and cenospheres. The clean fly ash had a mean particle size of about 30 microns, which is coarser than typical commercial fillers used in plastics. To obtain a finer sized fly ash, air classification was used to separate the clean fly ash into its coarse and fine fractions. The resulting fine fraction had a mean particle size of 4.13 microns and accounted for 16.7 wt% of the total clean ash. The brightness of the clean ash was also less than that of typical commercial fillers and efforts to improve the brightness proved unsuccessful. The resulting fine ash was then coated with a silane coupling agent and then added to polypropylene, low density polyethylene, and high density polyethylene at various levels. These mixtures were in turn used to make tensile test specimens by injection molding. For comparison, a commercial CaCO3 filler was also tested under the same conditions. The mechanical properties of these specimens were determined and the results show that the polymers containing fly ash as a filler have equivalent properties to those same polymers when commercial fillers are used in most cases.
Perspectives in the selection of hyaluronic acid fillers for facial wrinkles and aging skin
Hannah E John, Richard D Price
Patient Preference and Adherence , 2009, DOI: http://dx.doi.org/10.2147/PPA.S3183
Abstract: spectives in the selection of hyaluronic acid fillers for facial wrinkles and aging skin Review (5084) Total Article Views Authors: Hannah E John, Richard D Price Published Date July 2009 Volume 2009:3 Pages 225 - 230 DOI: http://dx.doi.org/10.2147/PPA.S3183 Hannah E John, Richard D Price Department of Plastic and Reconstructive Surgery, Addenbrookes Hospital, Cambridge University Teaching Hospitals NHS Trust, Cambridge, UK Abstract: Aesthetic surgery is, in the USA at least, no longer a taboo subject. Outside North America, public acceptance continues to grow as more procedures are performed each year. While there appears, anecdotally, to be a decrease in patients undergoing cosmetic treatments because of the global financial crisis, the overall trend remains upward. Although popular television programs espouse the benefits of surgery, it is nonsurgical procedures that account, numerically, for the majority of procedures performed; in the USA, there was a 48% growth from 2000 to 2008 in nonsurgical treatments undertaken by women, and 64% in men and while the average surgeon might perform 60 blepharoplasty operations in 2007, (s)he would also undertake 375 botulinum injections, and almost 200 filler injections of varying sorts. Clearly there is enthusiasm for nonsurgical treatments, and this trend appears to be rising. With this in mind, we present an overview of the commonest filler injection material, hyaluronic acid. We present the mechanism of action, the purported risks and benefits, and briefly discuss technique.
Tratamento dos sulcos palpebromalar e nasojugal com ácido hialur?nico
Viana, Giovanni André Pires;Osaki, Midori Hentona;Cariello, Angelino Júlio;Damasceno, Renato Wendell;
Arquivos Brasileiros de Oftalmologia , 2011, DOI: 10.1590/S0004-27492011000100010
Abstract: background: volume loss and muscular hyperactivity are two major components of the aging process that contribute to the formation of the folds and wrinkles. tear trough deformity is one of the most difficult depressions to correct surgically. purpose: the aim of this study was to evaluate the results of ten patients submitted to periorbital filling with hyaluronic acid gel filler. methods: between june and august, 2008, 10 patients have had their tears troughs treated with hyaluronic acid gel filler. the filler was introduced by a serial puncture technique and approximately 0.1 ml was injected at each pass. the filler was placed in the pre-periosteal tissue. patients photographs before and after the procedure were reviewed to assess the outcomes. results: the mean volume per side needed to achieve correction was on the right side 0.61 ml (sd=0.25) and on the left side 0.65 ml (sd=0.26). the most common complications were bruising, erythema, local swelling, and pain at the injection site. the effect of treatment lasted up to 12 months. conclusions: this pilot study showed that the treatment of tear trough deformity with hyaluronic acid gel filler was feasible, predictable and effective. all patients were very satisfied with their results.
A Guide to Cheek Augmentation: Single-Point Deep Injection of Hyaluronic Acid Filler at Midface in Close Proximity to Medial Suborbicularis Oculi Fat (SOOF) Area  [PDF]
Chung-Pin Liang, Haw-Yueh Thong
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2016, DOI: 10.4236/jcdsa.2016.61001
Abstract: Loss of volume in midface can result in an aged, wasted appearance. Osseous and fat atrophy with aging may further contribute to the loss of soft tissue support and midface ptosis. In the aging of periorbital area and midface, fat atrophy occurs mostly in the suborbicularis oculi fat (SOOF) area. The authors proposed that injection of hyaluronic acid (HA) filler to support the SOOF area could counteract the aging sign due to fat atrophy, restore volume loss and achieve a more youthful appearance. The authors described the treatment of 10 female patients who received CHAP®-particle hyaluronic acid (CHAP®-HA) injections for cheek augmentation, using single-point deep injection technique at midface in close proximity to SOOF area. Such approach provides satisfactory cheek augmentation results without significant complications. The authors discussed a rationale for their choice of dermal filler and provided an injection technique for restoring volume in the midface region with CHAP®-HA. Such technique is relatively quick to perform, have little down time, and result in a high rate of patient satisfaction.
Reinforcement of Polypropylene Composite system via Fillers and Compatibilizers  [PDF]
Neelam Singh, Santanu Dutta
Open Journal of Organic Polymer Materials (OJOPM) , 2013, DOI: 10.4236/ojopm.2013.31002
Abstract: The purpose of this work is to compare the mechanical properties of the different PP/ Filler composites. We considered the effect of treatment of the filler on the adhesion between the filler and the matrix. Modification of polypropylene (PP) with different coated and uncoated fillers is investigated in this paper. Six types of different fillers are used for preparation of filled PP composites. The composite samples were homogenized in a twin screw extruder. The compatibility of PP and fillers focused in this study and modified by using coupling agent. The obtained values of composites were cor- related with mechanical properties.
Effect of the Mineralogical Composition of Limestone on the Properties of Mortars  [PDF]
Carla Macie, Ar?o Manhique, Rodrigues Manjate, Carvalho Madivate
Journal of Materials Science and Chemical Engineering (MSCE) , 2016, DOI: 10.4236/msce.2016.45003
Abstract: Limestone has been used as a partial substitute for cement, due to its beneficial effect on mechanical properties of mortars and concretes. In the present research, we studied the effect of the mineralogical composition in mortars produced from limestone samples collected in different areas of Mozambique, using two cement types (Portland cement 32.5N and 42.5N). Additions of 10 to 25% limestone gave, in general and for the 32.5N cement, good results of the compressive strength for all limestone samples, while for the 42.5N only the Massinga samples performed well. Effect of the limestone additions on the flexural strength showed a beneficial effect for all samples and at all compositions studied, when using the 42.5N cement, while for the 32.5N cement only additions of 10% limestone gave values of the flexural strength higher than the reference material, with the exception of the Magude samples.
Effect of Nano-Filler on Structural and Ionic Transport Properties of Plasticized Polymer Electrolyte  [PDF]
Poonam Sharma, Dinesh Kumar Kanchan, Nirali Gondaliya
Open Journal of Organic Polymer Materials (OJOPM) , 2012, DOI: 10.4236/ojopm.2012.22006
Abstract: Polymer blend electrolytes, where PEO-PMMA polymer blend is used as polymer host matrix, doped with AgNO3 and plasticized with ethylene carbonate (EC) and Al2O3 as nano-filler were synthesized using the solution cast techniques. The polymer films were characterized by impedance spectroscopy, XRD, DSC, SEM, FT-IR and ionic transport mea-surements. The results indicate an enhancement in conductivity of PEO-PMMA-AgNO3-EC polymer electrolytes. The ionic conductivity of the polymer films is also found to increase with temperature. Electrical properties of polymer films in the framework of dielectric and modulus formalism are studied and discussed
Nanofiller Dispersion in Polymer Dielectrics  [PDF]
Daniel Tan, Yang Cao, Enis Tuncer, Patricia Irwin
Materials Sciences and Applications (MSA) , 2013, DOI: 10.4236/msa.2013.44A002
Abstract:

Nanodielectric composites have been developed in recent years attempting to improve the dielectric properties such as dielectric constant, dielectric strength and voltage endurance. Among various investigations, nanoparticle dispersion was particularly emphasized in this work. General Electric Global Research Center in Niskayuna NY USA has investigated various nanoparticles, nanocomposites and nanocomposite synthesis methods intending to understand particle dispersion and their impact on the nanocomposite dielectric properties. The breakdown strength and microstructures of the nanocomposites containing different particles were studied for projects related to capacitor and electrical insulation technologies. The nanocomposite synthesis methods either employed commerical nanoparticles or utilized nanoparticles that were self-assembled (in-situ precipitation) in a matrix. Our investigations have shown that nanocomposites prepared with solution chemistry were more favorable for producing uniform dispersion of nanoparticles. Structural information of nanocomposites was studied with transmission electron microscopy and the interection between particles and matrix polymers were tentatively probed using dielectric spectroscopy. In these new class of materials high energy densities on the order of 15J/cc were achievable in nanocomposites.

Abscess Formation as a Complication of Injectable Fillers  [PDF]
K. Conrad, Rassouli Alipasha, Siva Thiru, Thileeban Kandasamy
Modern Plastic Surgery (MPS) , 2015, DOI: 10.4236/mps.2015.52003
Abstract: Importance: Dermal filler use in aesthetic clinics, are now widespread and although complications are rare, the formation of granulomas or abscesses and subsequent defects can be devastating to the patient. Design: Retrospective chart review of 4 cases over the period of 10 years, from 2002-2012 were examined from The Nasal and Facial Plastic Cosmetic Surgery Institute. Results: Four female patients experienced delayed onset reactions (>2 weeks) with sterile abscess formation and eventual resolution with serial drainage and macrolide antibiotics were observed over a prolonged period until resolution occurred. Only 1 case identified an organism (streptococci) on culture after 8 months, however, the initial culture still showed only sterile abscess. All 4 had a history of previous injectable fillers, 2 patients had evidence of pre existing autoimmune disorders. Conclusions and Relevance: Since the treatment of all of these patients, there is new evidence that infections may present as delayed onset sterile abscesses due to biofilm formation. Fluorescent in situ hybridization (FISH) test has shown to be as specific in identifying responsible organisms in biofilm infections as simple culture but is more sensitive; thus preventing misdiagnosis of sterile abscess. Counter intuitively steroid injection may promote abscesses, while hyaluronidase may be useful.
Physico-Mechanical Properties of Luffa aegyptiaca Fiber Reinforced Polymer Matrix Composite  [PDF]
S. I. Ichetaonye, I. C. Madufor, M. E. Yibowei, D. N. Ichetaonye
Open Journal of Composite Materials (OJCM) , 2015, DOI: 10.4236/ojcm.2015.54014
Abstract: This paper presents the study of moisture content, hardness, bulk density, apparent porosity, tensile and flexural characteristics of composite properties of Luffa aegyptiaca fiber. Luffa aegyptiaca reinforced epoxy composites have been developed by hand lay-up method with Luffa fiber untreated and treated conditions for 12 Hrs and 24 Hrs in different filler loading as in 2:1 ratio (5%, 10%, 15%, 20% and 25%). The effects of filler loading on the moisture content, hardness, bulk density, apparent porosity, tensile and flexural properties were studied. In general, the treated Luffa fibre composite for 24 Hrs showed better improvement properties via addition of modified Luffa fibre as reinforcement. However, tensile and flexural properties improved continuously with increasing filler loading up to 20% but decreasing at 25% due to weak interfacial bonding for both untreated and treated composite. The favourable results were obtained at 20% for treated composite at 24 Hrs especially at tensile and flexural characteristics and are suitable for mechanical applications.
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