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Veronika Hagelstein, Markus Gerhart, Karl G Wagner
OBJECTIVES: Tricalcium citrate (TCC) was characterized as a tableting excipient for direct compression (DC) and dry granulation (DG). SIGNIFICANCE: Brittle materials usually lead to tablets of inferior mechanical strength compared to plastic deforming materials. A brittle material exhibiting a high tabletability with the ability to retain that behaviour during recompression would represent a valuable alternative to the commonly used microcrystalline cellulose (MCC)...
June 19, 2018: Drug Development and Industrial Pharmacy
Peter D Karp, Daniel Weaver, Mario Latendresse
BACKGROUND: Reaction gap filling is a computational technique for proposing the addition of reactions to genome-scale metabolic models to permit those models to run correctly. Gap filling completes what are otherwise incomplete models that lack fully connected metabolic networks. The models are incomplete because they are derived from annotated genomes in which not all enzymes have been identified. Here we compare the results of applying an automated likelihood-based gap filler within the Pathway Tools software with the results of manually gap filling the same metabolic model...
June 19, 2018: BMC Systems Biology
Xiaolu Wang, Wei Zheng, Lingxuan Zhao, Yuqiu Liu, Binyao Huang, John X Zhang
Whether and how context plays a role in metaphor processing remains a controversial issue. One major theory on metaphor comprehension, the graded salience hypothesis (GSH) model, emphasizes salience as the key factor determining the precedence of semantic access. Using event-related potential technique, the present study examined Chinese metaphors to investigate whether the salient meaning is always processed first regardless of context. The experiment employed a Prime-Target-Probe paradigm. Three-character Chinese verb-object metaphors were used as the Target proceeded by one of the three contexts (the Prime): (1) metaphorical context priming the Target's metaphorical meaning, (2) literal context priming the Target's literal meaning, and (3) irrelevant context as the control condition...
January 1, 2018: Psychological Reports
Alessandro Mattiola, Dieter Bosshardt, Patrick R Schmidlin
Tooth extraction causes vertical and horizontal alveolar bone loss and consequent remodeling. Several methods have been introduced in terms of so-called “ridge preservation” techniques, which mostly resemble guided bone regenerative (GBR) procedures using filler materials and membranes in order to stabilize the respective sites. This conceptual case report describes a novel approach using a degradable polylactic acid membrane covered with a collagen matrix, which aims to reshape the resorbed alveolar wall and thereby to stabilize the soft tissues during matrix formation and socket mineralization...
June 17, 2018: Dentistry journal
Robert Stencel, Jacek Kasperski, Wojciech Pakieła, Anna Mertas, Elżbieta Bobela, Izabela Barszczewska-Rybarek, Grzegorz Chladek
Secondary caries is one of the important issues related to using dental composite restorations. Effective prevention of cariogenic bacteria survival may reduce this problem. The aim of this study was to evaluate the antibacterial activity and physical properties of composite materials with silver sodium hydrogen zirconium phosphate (SSHZP). The antibacterial filler was introduced at concentrations of 1%, 4%, 7%, 10%, 13%, and 16% ( w / w ) into model composite material consisting of methacrylate monomers and silanized glass and silica fillers...
June 18, 2018: Materials
Michele Pascali, Davide Quarato, Francesco Carinci
The ideal perioral and lip rejuvenation technique provides the longest period of efficacy, lowest complication rate, and best aesthetic results. Genetics, intrinsic aging, sun exposure and repetitive muscle twitching of the orbicularis oris produce angular, radial, and vertical lines of the perioral lines and, for this reason, the needs of patients in the treatment of this anatomical area can range from simple lip enhancement to a broader and more comprehensive treatment with simultaneous correction of perioral wrinkles...
June 18, 2018: Rejuvenation Research
Samera H Hamad, Nathan M Johnson, Margaret E Tefft, Marielle C Brinkman, Sydney M Gordon, Pamela I Clark, Stephanie S Buehler
Objective: Our objective was to characterize physical properties and semivolatile harmful and potentially harmful constituent yields in the mainstream smoke (MSS) of 4 popular little cigars compared to the 3R4F reference cigarette. Methods: We used the ISO and Canadian Intense Regimen protocols to generate MSS for Cheyenne (Full Flavor and Menthol) and Swisher Sweets (Original and Sweet Cherry) little cigars; and the 3R4F. We examined physical properties such as length, tobacco filler mass, pressure drop, and ventilation for each product...
October 2017: Tobacco Regulatory Science
Tyler J D'Ovidio, Rebecca M Roberts, Dixa Gautam, Zefram D Marks, Manju Saraswathy, Jeffrey W Stansbury, Devatha P Nair
The enhanced in situ photopolymerization kinetics of methyl methacrylate (MMA) to poly(methyl methacrylate) (PMMA) through the incorporation of both inert and reactive nanogel (NG) fillers under ambient conditions has been demonstrated. In addition to the polymerization kinetics, the physical and chemical properties of the prepolymeric NG were also utilized to tune the thermoplasticity and mechanical properties of the PMMA polymer network. The protocol followed in this study imparts superior MMA photopolymerization kinetics (≥ 60% double-bond conversion within 15 min for > 35 wt% nanogel loadings and ≥ 95% double-bond conversion in < 60 min for all NG concentrations) when compared with traditional polymerization mechanisms...
June 2, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Matej Par, Nika Spanovic, Ruza Bjelovucic, Hrvoje Skenderovic, Ozren Gamulin, Zrinka Tarle
OBJECTIVES: The aim of this work was to investigate the curing potential of an experimental resin composite series with the systematically varying amount of bioactive glass 45S5 by evaluating the degree of conversion, light transmittance and depth of cure. METHODS: Resin composites based on a Bis-GMA/TEGDMA resin with a total filler load of 70 wt% and a variable amount of bioactive glass (0-40 wt%) were prepared. The photoinitiator system was camphorquinone and ethyl-4-(dimethylamino) benzoate...
June 14, 2018: Journal of Dentistry
Teresa Limpo, Rui A Alves
Expert writing involves the interaction among three cognitively demanding processes: planning, translating, and revising. To manage the cognitive load brought on by these processes, writers frequently use strategies. Here, we examined the effects of planning strategies on writing dynamics and final texts. Before writing an argumentative text with the triple-task technique, 63 undergraduates were asked either to elaborate an outline with the argumentative structure embedded (structure-based planning condition), to provide a written list of ideas for the text (list-based planning condition), or to do a non-writing-related filler task (no planning condition)...
June 12, 2018: Acta Psychologica
Martina Rossi, Barbara Roda, Silvia Zia, Ilaria Vigliotta, Chiara Zannini, Francesco Alviano, Laura Bonsi, Andrea Zattoni, Pierluigi Reschiglian, Alessandro Gennai
Background: New microfat preparations provide material suitable for use as a regenerative filler for different facial areas. To support the development of new robust techniques for regenerative purposes, the cellular content of the sample should be considered. Objectives: To evaluate the stromal vascular fraction (SVF) cell components of micro-superficial enhanced fluid fat injection (SEFFI) samples via a technique to harvest re-injectable tissue with minimum manipulation...
June 14, 2018: Aesthetic Surgery Journal
U Wollina, C Wiegand, U-C Hipler
Soft tissue fillers are used in aesthetic medicine for volumizing and for contouring. Calcium hydroxylapatite (CaHA) is a fully biodegradable biostimulatory filler. The study presents results of in vitro biocompatibility and cytotoxicity investigations performed on CaHA and illustrates its clinical effects. We used a human cell culture model for in vitro studies with HaCaT keratinocytes and human dermal fibroblasts, known to be a sensitive cell type for biocompatibility and cytotoxicity. Cells were exposed to different concentrations of CaHA (Radiesse®)...
May 2018: Georgian Medical News
Frances M Walocko, Ariel E Eber, Robert S Kirsner, Evangelos Badiavas, Keyvan Nouri
BACKGROUND: Adipose tissue has classically functioned as a filler in restoring facial volume. Adipose tissue is also rich in stem cells, which may have a role in regenerative medicine. OBJECTIVE: To summarize the literature on the clinical uses of adipose tissue in scarring, wound healing, and hair growth and determine if evidence exists for clinical practice changes in dermatology. METHODS: We utilized the Preferred Reporting Items for Systemic Reviews and Meta-Analysis (PRISMA) to conduct the review...
June 11, 2018: Journal of the American Academy of Dermatology
Hui Shi, Ling-Ling Liang, Zhi-Hua Cui
No abstract text is available yet for this article.
June 14, 2018: JAMA Ophthalmology
Benjamin März, Kenny Jolley, Thomas James Marrow, Zhaoxia Zhou, Malcolm Heggie, Roger Smith, Houzheng Wu
The data in this article are related to the research article "Mesoscopic structure features in synthetic graphite" (März et al., 2018) [1]. Details of the manufacture of isostatically moulded graphite (iso-graphite), thin foil preparation by focused ion beams (FIB) for analysis, and characterisation methods are provided. The detailed structures of coke filler and binding carbon are presented through scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM) and Raman spectroscopy characterisation...
August 2018: Data in Brief
Na Wang, Miao Zhang, Ping Kang, Jing Zhang, Qinghong Fang, Wenda Li
Aiming to improve the flame retardancy performance of natural rubber (NR), we developed a novel flame retardant synergistic agent through grafting of MCM-41 to graphene oxide (GO), named as GO-NH-MCM-41, as an assistant to intumescent flame retardants (IFR). The flame retardancy of NR/IFR/GO-NH-MCM-41 composites was evaluated by limited oxygen index (LOI), UL-94, and cone calorimeter test. The LOI value of NR/IFR/GO-NH-MCM-41 reached 26.3%; the UL-94 ratings improved to a V-0 rating. Moreover, the addition of GO-NH-MCM-41 decreased the peak heat release rate (PHRR) and the total heat release (THR) of the natural rubber composites...
June 13, 2018: Materials
Didem Civancik-Uslu, Laura Ferrer, Rita Puig, Pere Fullana-I-Palmer
The use of functional fillers can be advantageous in terms of cost reduction and improved properties in plastics. There are many types of fillers used in industry, organic and inorganic, with a wide application area. As a response to the growing concerns about environmental damage that plastics cause, recently fillers have started to be considered as a way to reduce it by decreasing the need for petrochemical resources. Life cycle assessment (LCA) is identified as a proper tool to evaluate potential environmental impacts of products or systems...
June 1, 2018: Science of the Total Environment
Fabíola Jardim Barbon, Rafael Ratto Moraes, Joseane Viccari Calza, Ana Paula Perroni, Aloísio Oro Spazzin, Noéli Boscato
The influence of inorganic filler content of resin-based luting agents (RBLAs) on color change (ΔE00), CIEL*a*b* (individual color coordinates), and translucency parameters (TP) of simulated ceramic laminate veneer (CLV) was investigated. RBLAs with low, intermediate, and high inorganic filler content (55%, 65%, and 75% mass fractions, respectively) were prepared. Feldspar ceramic (Vitablocs Mark II) specimens (1.2 mm × 0.8 mm, A1C shade) were bonded to simulated composite resin substrates (1.6 mm × 1.2 mm, A2D shade) using three experimental and a commercial (RelyX Veneer) RBLA (translucent shade)...
June 7, 2018: Brazilian Oral Research
Miles H Graivier, Lawrence M Bass, Z Paul Lorenc, Rebecca Fitzgerald, David J Goldberg, Gottfried Lemperle
Though the incidence of complications and adverse events with dermatological fillers is inherently low, practitioners should be well versed in both prevention of filler complications and the treatment algorithms for addressing "granulomas," nodules, infection, and vascular compromise. Appropriate preventative measures, coupled with timely and effective treatment, are critically important for patient safety and satisfaction. In addition to the preventive measures and treatment algorithms outlined here, the authors emphasize that the broad classification and treatment of nodules as "granulomas" is likely to lead to ineffective treatment, or worse, unnecessary exposure to incorrect treatment...
April 6, 2018: Aesthetic Surgery Journal
David J Goldberg, Lawrence M Bass, Rebecca Fitzgerald, Miles H Graivier, Z Paul Lorenc
Loss of facial volume and soft-tissue support are common to types of facial aging. Restoration of a youthful appearance relies upon correction of this loss, and can be achieved in various capacities through use of biostimulatory or hyaluronic acids (HA) injectable fillers. Here, the authors discuss the versatility of calcium hydroxylapatite (CaHA) in volume replacement and the applications and facial regions for which CaHA, poly-L-lactic acid (PLLA), and HA fillers are best suited.
April 6, 2018: Aesthetic Surgery Journal
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