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https://www.readbyqxmd.com/read/28449548/vibration-induced-property-change-in-the-melting-and-solidifying-process-of-metallic-nanoparticles
#1
Yonggang Zheng, Liquan Ding, Hongfei Ye, Zhen Chen
Tuning material properties in the 3-D printing process of metallic parts is a challenging task of current interests. Much research has been conducted to understand the effects of controlling parameters such as the particle geometry (size and shape), heating, and cooling ways on the outcome of the printing process. However, nothing has been done to explore the system vibration effect. This letter reports our findings on the vibration-induced property change in the melting and solidifying process of silver nanoparticles with the use of molecular dynamics simulation...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28449431/three-dimensional-printing-of-external-airway-splints-for-tracheomalacia
#2
EDITORIAL
Hester F Shieh, Russell W Jennings
No abstract text is available yet for this article.
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28448043/challenges-in-rheological-characterization-of-highly-concentrated-suspensions-a-case-study-for-screen-printing-silver-pastes
#3
Ceren Yüce, Norbert Willenbacher
A comprehensive rheological characterization of highly concentrated suspensions or pastes is mandatory for a targeted product development meeting the manifold requirements during processing and application of such complex fluids. In this investigation, measuring protocols for a conclusive assessment of different process relevant rheological parameters have been evaluated. This includes the determination of yield stress, viscosity, wall slip velocity, structural recovery after large deformation and elongation at break as well as tensile force during filament stretching...
April 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28448040/determination-of-high-affinity-antibody-antigen-binding-kinetics-using-four-biosensor-platforms
#4
Danlin Yang, Ajit Singh, Helen Wu, Rachel Kroe-Barrett
Label-free optical biosensors are powerful tools in drug discovery for the characterization of biomolecular interactions. In this study, we describe the use of four routinely used biosensor platforms in our laboratory to evaluate the binding affinity and kinetics of ten high-affinity monoclonal antibodies (mAbs) against human proprotein convertase subtilisin kexin type 9 (PCSK9). While both Biacore T100 and ProteOn XPR36 are derived from the well-established Surface Plasmon Resonance (SPR) technology, the former has four flow cells connected by serial flow configuration, whereas the latter presents 36 reaction spots in parallel through an improvised 6 x 6 crisscross microfluidic channel configuration...
April 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28448003/standardized-method-for-measuring-collection-efficiency-from-wipe-sampling-of-trace-explosives
#5
Jennifer R Verkouteren, Jeffrey A Lawrence, Matthew E Staymates, Edward Sisco
One of the limiting steps to detecting traces of explosives at screening venues is effective collection of the sample. Wipe-sampling is the most common procedure for collecting traces of explosives, and standardized measurements of collection efficiency are needed to evaluate and optimize sampling protocols. The approach described here is designed to provide this measurement infrastructure, and controls most of the factors known to be relevant to wipe-sampling. Three critical factors (the applied force, travel distance, and travel speed) are controlled using an automated device...
April 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447994/scaling-of-engineered-vascular-grafts-using-3d-printed-guides-and-the-ring-stacking-method
#6
Cameron B Pinnock, Zhengfan Xu, Mai T Lam
Coronary artery disease remains a leading cause of death, affecting millions of Americans. With the lack of autologous vascular grafts available, engineered grafts offer great potential for patient treatment. However, engineered vascular grafts are generally not easily scalable, requiring manufacture of custom molds or polymer tubes in order to customize to different sizes, constituting a time-consuming and costly practice. Human arteries range in lumen diameter from about 2.0-38 mm and in wall thickness from about 0...
March 27, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447851/-understanding-the-role-of-speech-production-in-reading-evidence-for-a-print-to-speech-neural-network-using-graphical-analysis-correction-to-cummine-et-al-2016
#7
(no author information available yet)
Reports an error in "Understanding the role of speech production in reading: Evidence for a print-to-speech neural network using graphical analysis" by Jacqueline Cummine, Ivor Cribben, Connie Luu, Esther Kim, Reyhaneh Bahktiari, George Georgiou and Carol A. Boliek (Neuropsychology, 2016[May], Vol 30[4], 385-397). In the article, the fifth author's name [Bakhtiari] was misspelled. The online version of this article has been corrected. (The following abstract of the original article appeared in record 2015-49069-001...
May 2017: Neuropsychology
https://www.readbyqxmd.com/read/28447801/droplets-on-microdecorated-surfaces-evolution-of-the-polygonal-contact-line
#8
Alok Kumar, Rishi Raj
Interaction of liquids with surfaces is ubiquitous in our physical environment as well as many engineering applications. Recent advances on this topic have not only provided us with valuable insight into nature's design, but also enabled improved fluidic manipulation for liquid-based printing applications such as bio-microarrays for protein and DNA sequencing, multicolor polymer-based LED displays, inkjet printing, and solder droplet printing, among others. For example, droplet contact lines which are typically circular on a smooth and homogenous surface when deposited on a microdecorated surface may take various common polygonal shapes such as squares, rectangles, hexagons, octagons and dodecagons...
April 27, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28447665/creation-of-energetic-biothermite-inks-using-ferritin-liquid-protein
#9
Joseph M Slocik, Ruel McKenzie, Patrick B Dennis, Rajesh R Naik
Energetic liquids function mainly as fuels due to low energy densities and slow combustion kinetics. Consequently, these properties can be significantly increased through the addition of metal nanomaterials such as aluminium. Unfortunately, nanoparticle additives are restricted to low mass fractions in liquids because of increased viscosities and severe particle agglomeration. Nanoscale protein ionic liquids represent multifunctional solvent systems that are well suited to overcoming low mass fractions of nanoparticles, producing stable nanoparticle dispersions and simultaneously offering a source of oxidizing agents for combustion of reactive nanomaterials...
April 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28446974/stents-for-airway-strictures-selection-and-results
#10
REVIEW
Adil Ayub, Adnan M Al-Ayoubi, Faiz Y Bhora
Airway stents can provide effective and timely relief in patients with central airway obstruction. Silicone based stents are the most commonly used airway stents worldwide with a long track record of safety. Metallic stents continue to evolve from the earliest uncovered versions to a variety of newly designed covered stents. Despite the availability of a variety of stent materials and designs, minimal advances have been made towards innovation in stent technology and an ideal stent has unfortunately not yet been developed...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28446938/minimally-invasive-surgery-for-resection-of-ossification-of-the-ligamentum-flavum-in-the-thoracic-spine
#11
Wei Zhao, Chaoxiong Shen, Ranze Cai, Jianfeng Wu, Yuandong Zhuang, Zhaowen Cai, Rui Wang, Chunmei Chen
INTRODUCTION: Thoracic ossification of the ligamentum flavum (TOLF) is a common cause of progressive thoracic myelopathy. Surgical decompression is commonly used to treat TOLF. AIM: To evaluate the clinical outcomes of microsurgical decompression of TOLF via a paraspinal approach, using a percutaneous tubular retractor system. MATERIAL AND METHODS: First, three-dimensional (3D) image reconstruction and printed models were made from thin computed tomography scans for each patient...
2017: Wideochirurgia i Inne Techniki Mało Inwazyjne, Videosurgery and Other Miniinvasive Techniques
https://www.readbyqxmd.com/read/28446794/up-scalable-full-colour-plasmonic-pixels-with-controllable-hue-brightness-and-saturation
#12
Renilkumar Mudachathi, Takuo Tanaka
It has long been the interests of scientists to develop ink free colour printing technique using nano structured materials inspired by brilliant colours found in many creatures like butterflies and peacocks. Recently isolated metal nano structures exhibiting preferential light absorption and scattering have been explored as a promising candidate for this emerging field. Applying such structures in practical use, however, demands the production of individual colours with distinct reflective peaks, tunable across the visible wavelength region combined with controllable colour attributes and economically feasible fabrication...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28446781/inkjet-printing-of-high-performance-transistors-with-micron-order-chemically-set-gaps
#13
Peter Mack Grubb, Harish Subbaraman, Saungeun Park, Deji Akinwande, Ray T Chen
This paper reports a 100% inkjet printed transistor with a short channel of approximately 1 µm with an operating speed up to 18.21 GHz. Printed electronics are a burgeoning area in electronics development, but are often stymied by the large minimum feature size. To combat this, techniques were developed to allow for the printings of much shorter transistor channels. The small gap size is achieved through the use of silver inks with different chemical properties to prevent mixing. The combination of the short channel and semiconducting carbon nanotubes (CNT) allows for an exceptional experimentally measured on/off ratio of 10(6)...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28446020/direct-writing-of-microfluidic-footpaths-by-pyro-ehd-printing
#14
Sara Coppola, Giuseppe Nasti, Michele Todino, Federico Olivieri, Veronica Vespini, Pietro Ferraro
A direct writing method for fabricating microfluidic footpaths by pyro-Electrohydrodynamic (EHD) jet printing is reported. Here we propose the use of a nozzle-free 3D printing technique for the fabrication of printed structures that can be embedded in a variety of soft, transparent, flexible and biocompatible polymers, and thus easily integrated into lab-on-chip (LOC) devices. We prove the advantage of the high resolution and flexibility of pyro-EHD printing for the realization of microfluidic channels well below the standard limit in dimension of conventional ink-jet printing technique and simply adaptable to the final user desires in terms of geometry and materials...
April 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28445902/a-3d-printed-cap-with-sideoptics-for-colonoscopy-a-randomized-ex-vivo-study
#15
Benjamin M Walter, Alexander Hann, Rena Frank, Alexander Meining
Background Adequate polyp detection is crucial to colonoscopy; however, detection can be impaired. In particular, flat polyps located behind folds or near the colonic flexures appear to be a problem. We present a cheap and easily adjustable 3D-printed tool to enhance the view of a standard colonoscope using additional commercially available sideoptics. Materials and methods A cap adjustable to a standard endoscope was printed by a 3 D printer and had two microcameras fixed to offer two additional views...
April 26, 2017: Endoscopy
https://www.readbyqxmd.com/read/28445488/a-versatile-method-for-dynamically-controlled-patterning-of-small-populations-of-epithelial-cells-on-substrates-via-non-contact-piezoelectric-inkjet-printing
#16
Kristen B Lee, Laimonas Kelbauskas, Alan Brunner, Deirdre R Meldrum
Intercellular interactions play a central role at the tissue and whole organism level modulating key cellular functions in normal and disease states. Studies of cell-cell communications are challenging due to ensemble averaging effects brought about by intrinsic heterogeneity in cellular function which requires such studies to be conducted with small populations of cells. Most of the current methods for producing and studying such small cell populations are complex to implement and require skilled personnel limiting their widespread utility in biomedical research labs...
2017: PloS One
https://www.readbyqxmd.com/read/28445375/a-new-classification-of-three-dimensional-printing-technologies-systematic-review-of-three-dimensional-printing-for-patient-specific-craniomaxillofacial-surgery
#17
Carly A Jacobs, Alexander Y Lin
BACKGROUND: Three-dimensional printing technology has been advancing in surgical applications. This systematic review examines its patient-specific applications in craniomaxillofacial surgery. METHODS: Terms related to "three-dimensional printing" and "surgery" were searched on PubMed on May 4, 2015; 313 unique articles were returned. Inclusion and exclusion criteria concentrated on patient-specific surgical applications, yielding 141 full-text articles, of which 33 craniomaxillofacial articles were analyzed...
May 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28444580/three-dimensional-virtual-planning-of-corrective-osteotomies-of-distal-radius-malunions-a-systematic-review-and-meta-analysis
#18
REVIEW
R J O de Muinck Keizer, K M Lechner, M A M Mulders, N W L Schep, D Eygendaal, J C Goslings
The purpose of this study was to summarize and evaluate results of three-dimensional (3D-) planned corrective osteotomies of malunited distal radius fractures. 3D-planning techniques provide the possibility to address 3D-deformity that conventional planning methods might not address. We systematically searched PubMed, EMBASE and the Cochrane library for studies that performed a 3D-planned corrective osteotomy on patients with a malunited distal radius fracture. Fifteen studies with a total of 68 patients were included in the analysis...
April 25, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28444404/velmahos-gc-degiannis-e-doll-d-eds-penetrating-trauma-a-practical-guide-on-operative-technique-and-peri-operative-management-springer-verlag-berlin-heidelberg-2017-isbn-978-3-662-49857-6-print-978-3-662-49859-0-online
#19
F J Turégano
No abstract text is available yet for this article.
April 25, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/28444177/single-centre-experience-with-transapical-transcatheter-mitral-valve-implantation%C3%A2
#20
Gry Dahle, Kjell-Arne Rein, Arnt E Fiane
OBJECTIVES: A transcatheter heart valve technique can be used in failed mitral valve repairs with annuloplasty rings, deterioriated bioprostheses and in mitral annular calcification, all serving as 'docking stations' for balloon-expandable valves. Specially designed transcatheter mitral valve platforms are used in ongoing studies for native mitral valve regurgitation. We present our single centre experience with transcatheter mitral valve implantation-transapical approach procedures in eleven patients...
April 21, 2017: Interactive Cardiovascular and Thoracic Surgery
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