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https://www.readbyqxmd.com/read/28102670/microfluidization-of-graphite-and-formulation-of-graphene-based-conductive-inks
#1
Panagiotis G Karagiannidis, Stephen A Hodge, Lucia Lombardi, Flavia Tomarchio, Nicolas Decorde, Silvia Milana, Ilya Goykhman, Yang Su, Steven V Mesite, Duncan N Johnstone, Rowan K Leary, Paul A Midgley, Nicola M Pugno, Felice Torrisi, Andrea C Ferrari
We report the exfoliation of graphite in aqueous solutions under high shear rate turbulent flow conditions, with a 100\% exfoliation yield. The material is stabilized without centrifugation at concentrations up to 100 g/L using carboxymethylcellulose sodium salt to formulate conductive printable inks. The sheet resistance of blade coated films is below~2Ω/□. This is a simple and scalable production route for conductive inks for large area printing in flexible electronics.
January 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28102576/printable-functional-chips-based-on-nanoparticle-assembly
#2
REVIEW
Yu Huang, Wenbo Li, Meng Qin, Haihua Zhou, Xingye Zhang, Fengyu Li, Yanlin Song
With facile manufacturability and modifiability, impressive nanoparticles (NPs) assembly applications were performed for functional patterned devices, which have attracted booming research attention due to their increasing applications in high-performance optical/electrical devices for sensing, electronics, displays, and catalysis. By virtue of easy and direct fabrication to desired patterns, high throughput, and low cost, NPs assembly printing is one of the most promising candidates for the manufacturing of functional micro-chips...
January 2017: Small
https://www.readbyqxmd.com/read/28102349/development-of-patient-specific-phantoms-for-verification-of-stereotactic-body-radiation-therapy-planning-in-patients-with-metallic-screw-fixation
#3
Dongryul Oh, Chae-Seon Hong, Sang Gyu Ju, Minkyu Kim, Bum Yong Koo, SungBack Choi, Hee Chul Park, Doo Ho Choi, Hongryull Pyo
A new technique for manufacturing a patient-specific dosimetric phantom using three-dimensional printing (PSDP_3DP) was developed, and its geometrical and dosimetric accuracy was analyzed. External body contours and structures of the spine and metallic fixation screws (MFS) were delineated from CT images of a patient with MFS who underwent stereotactic body radiation therapy for spine metastasis. Contours were converted into a STereoLithography file format using in-house program. A hollow, four-section PSDP was designed and manufactured using three types of 3DP to allow filling with a muscle-equivalent liquid and insertion of dosimeters...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28099529/a-possible-role-of-the-full-length-nascent-protein-in-post-translational-ribosome-recycling
#4
Debasis Das, Dibyendu Samanta, Arpita Bhattacharya, Arunima Basu, Anindita Das, Jaydip Ghosh, Abhijit Chakrabarti, Chanchal Das Gupta
Each cycle of translation initiation in bacterial cell requires free 50S and 30S ribosomal subunits originating from the post-translational dissociation of 70S ribosome from the previous cycle. Literature shows stable dissociation of 70S from model post-termination complexes by the concerted action of Ribosome Recycling Factor (RRF) and Elongation Factor G (EF-G) that interact with the rRNA bridge B2a/B2b joining 50S to 30S. In such experimental models, the role of full-length nascent protein was never considered seriously...
2017: PloS One
https://www.readbyqxmd.com/read/28099494/a-3d-printed-toolbox-for-opto-mechanical-components
#5
Luis José Salazar-Serrano, Juan P Torres, Alejandra Valencia
In this article we present the development of a set of opto-mechanical components (a kinematic mount, a translation stage and an integrating sphere) that can be easily built using a 3D printer based on Fused Filament Fabrication (FFF) and parts that can be found in any hardware store. Here we provide a brief description of the 3D models used and some details on the fabrication process. Moreover, with the help of three simple experimental setups, we evaluate the performance of the opto-mechanical components developed by doing a quantitative comparison with its commercial counterparts...
2017: PloS One
https://www.readbyqxmd.com/read/28098753/reagent-less-and-robust-biosensor-for-direct-determination-of-lactate-in-food-samples
#6
Iria Bravo, Mónica Revenga-Parra, Félix Pariente, Encarnación Lorenzo
Lactic acid is a relevant analyte in the food industry, since it affects the flavor, freshness, and storage quality of several products, such as milk and dairy products, juices, or wines. It is the product of lactose or malo-lactic fermentation. In this work, we developed a lactate biosensor based on the immobilization of lactate oxidase (LOx) onto N,N'-Bis(3,4-dihydroxybenzylidene) -1,2-diaminobenzene Schiff base tetradentate ligand-modified gold nanoparticles (3,4DHS-AuNPs) deposited onto screen-printed carbon electrodes, which exhibit a potent electrocatalytic effect towards hydrogen peroxide oxidation/reduction...
January 13, 2017: Sensors
https://www.readbyqxmd.com/read/28098672/a-chronicle-of-pa-journals
#7
Roderick S Hooker
At its semicentennial mark, the PA profession appears to be flourishing. Over the past 50 years, a number of journals have emerged to highlight the development of the profession and offer observations on it. The Physician Associate Journal, launched in 1970, was the first foray into PA reporting. Following this small effort, a dozen journals or newspapers came into print, lasted for a while, and then were replaced or died. Of journals that survived to the present, four are in English and one in Dutch. Three of the five journals are association-based, and four produce clinical articles; publication is monthly, quarterly, or semiannually...
February 2017: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/28097947/evaluating-waste-printed-circuit-boards-recycling-opportunities-and-challenges-a-mini-review
#8
Abhishek Kumar Awasthi, Gabriel Ionut Zlamparet, Xianlai Zeng, Jinhui Li
Rapid generation of waste printed circuit boards has become a very serious issue worldwide. Numerous techniques have been developed in the last decade to resolve the pollution from waste printed circuit boards, and also recover valuable metals from the waste printed circuit boards stream on a large-scale. However, these techniques have their own certain specific drawbacks that need to be rectified properly. In this review article, these recycling technologies are evaluated based on a strength, weaknesses, opportunities and threats analysis...
January 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28097249/application-of-a-3d-custom-printed-patient-specific-spinal-implant-for-c1-2-arthrodesis
#9
Kevin Phan, Alessandro Sgro, Monish M Maharaj, Paul D'Urso, Ralph J Mobbs
The study aims to describe a three-dimensional printed (3DP) posterior fixation implant used for C1/C2 fusion in a 65-year-old female. Spinal fusion remains a common intervention for a range of spinal pathologies including degenerative disc and facet disease when conservative methods are unsuccessful. However, fusion devices are not always entirely efficacious in providing the desired fixation, and surgeons rely on 'off the shelf' implants which may not provide an anatomical fit to address the particular pathology...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28096976/effect-of-handrubbing-using-locally-manufactured-alcohol-based-handrubs-in-paediatric-wards-in-harare-zimbabwe
#10
Muchaneta Gudza-Mugabe, Marcelyn T Magwenzi, Hilda A Mujuru, Mutsa Bwakura-Dangarembizi, Valerie Robertson, Alexander M Aiken
We assessed bacterial contamination of hands of adults present in paediatric wards in two tertiary-care hospitals in Harare, Zimbabwe and the microbiologic efficacy of locally-manufactured alcohol-based hand rub (ABHR). During unannounced visits, samples were collected using hand-print and hand-rinse methods. Samples were collected from 152 individuals (16 nurses, 10 doctors, 28 students, 86 parents/guardians, 12 others). Contamination of hands with Gram-negative bacteria was found in 91% of adults tested with a mean of 14...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28096747/implementing-a-3d-printing-service-in-a-biomedical-library
#11
Verma Walker
Three-dimensional (3D) printing is opening new opportunities in biomedicine by enabling creative problem solving, faster prototyping of ideas, advances in tissue engineering, and customized patient solutions. The National Institutes of Health (NIH) Library purchased a Makerbot Replicator 2 3D printer to give scientists a chance to try out this technology. To launch the service, the library offered training, conducted a survey on service model preferences, and tracked usage and class attendance. 3D printing was very popular, with new lab equipment prototypes being the most common model type...
January 2017: Journal of the Medical Library Association: JMLA
https://www.readbyqxmd.com/read/28094997/combined-inkjet-printing-and-infra-red-sintering-of-silver-nanoparticles-using-a-swathe-by-swathe-and-layer-by-layer-approach-for-3-dimensional-structures
#12
Jayasheelan Vaithilingam, Marco Simonelli, Ehab Saleh, Nicola Senin, Ricky D Wildman, Richard J M Hague, Richard K Leach, Christopher J Tuck
Despite the advancement of additive manufacturing/3-dimensional (3D) printing, single-step fabrication of multifunctional parts using AM is limited. With the view of enabling multifunctional AM (MFAM), in this study, sintering of metal nanoparticles was performed to obtain conductivity for continuous line inkjet printing of electronics. This was achieved using a bespoke three dimensional (3D) inkjet-printing machine, JETx®, capable of printing a range of materials and utilizing different post processing procedures to print multi-layered 3D structures in a single manufacturing step...
January 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28094916/3d-printing-of-carbon-nanotubes-based-microsupercapacitors
#13
Wei Yu, Han Zhou, Ben Q Li, Shujiang Ding
A novel 3D printing procedure is presented for fabrication of carbon nanotubes-based microsupercapacitors. The 3D printer uses CNTs ink slurry with moderate solid content and prints continuous droplets. Appropriate control of a heated base is applied to facilitate the solvent removal and adhesion among printed features and to improve the structure integrity without delamination or distortion upon drying. The printed electrodes for microsupercapacitors are characterized by SEM, a laser scanning confocal microscope and a step profiler...
January 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28094855/technical-note-dose-distributions-in-the-vicinity-of-high-density-implants-using-3d-gel-dosimeters
#14
Andre Asena, Shaun Thomas Smith, Tanya Kairn, Scott Bradley Crowe, Kazuyuki Hosokawa, Steven Sylvander, Jamie Vincent Trapp
PURPOSE: In this work, we develop a methodology for using Fricke gel dosimeters for dose distribution measurements surrounding high-density implants which circumvents artefact production by removing the obstruction during imaging. METHODS: Custom 3D printed moulds were used to set cavities in Fricke gel phantoms to allow for the suspension of high density implants in different geometries. This allowed for the metal valve extracted from a temporary tissue expander to be suspended during irradiation, and removed during optical-CT scanning...
January 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28094540/examining-mechanisms-underlying-fear-control-in-the-extended-parallel-process-model
#15
Brian L Quick, Nicole R LaVoie, Tobias Reynolds-Tylus, Andrea Martinez-Gonzalez, Chris Skurka
This investigation sought to advance the extended parallel process model in important ways by testing associations among the strengths of efficacy and threat appeals with fear as well as two outcomes of fear-control processing, psychological reactance and message minimization. Within the context of print ads admonishing against noise-induced hearing loss (NIHL) and the fictitious Trepidosis virus, partial support was found for the additive model with no support for the multiplicative model. High efficacy appeals mitigated freedom threat perceptions across both contexts...
January 17, 2017: Health Communication
https://www.readbyqxmd.com/read/28094392/3d-printing-of-self-assembling-thermoresponsive-nanoemulsions-into-hierarchical-mesostructured-hydrogels
#16
Lilian C Hsiao, Abu Zayed Md Badruddoza, Li-Chiun Cheng, Patrick S Doyle
Spinodal decomposition and phase transitions have emerged as viable methods to generate a variety of bicontinuous materials. Here, we show that when arrested phase separation is coupled to the time scales involved in three-dimensional (3D) printing processes, hydrogels with multiple length scales spanning nanometers to millimeters can be printed with high fidelity. We use an oil-in-water nanoemulsion-based ink with rheological and photoreactive properties that satisfy the requirements of stereolithographic 3D printing...
January 17, 2017: Soft Matter
https://www.readbyqxmd.com/read/28094255/specific-and-sensitive-isothermal-electrochemical-biosensor-for-plant-pathogen-dna-detection-with-colloidal-gold-nanoparticles-as-probes
#17
Han Yih Lau, Haoqi Wu, Eugene J H Wee, Matt Trau, Yuling Wang, Jose R Botella
Developing quick and sensitive molecular diagnostics for plant pathogen detection is challenging. Herein, a nanoparticle based electrochemical biosensor was developed for rapid and sensitive detection of plant pathogen DNA on disposable screen-printed carbon electrodes. This 60 min assay relied on the rapid isothermal amplification of target pathogen DNA sequences by recombinase polymerase amplification (RPA) followed by gold nanoparticle-based electrochemical assessment with differential pulse voltammetry (DPV)...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28093905/inkjet-printing-of-soft-stretchable-optical-waveguides-through-the-photopolymerization-of-high-profile-linear-patterns
#18
Aleksandra Samusjew, Markus Kratzer, Andreas Moser, Christian Teichert, Krzysztof Konrad Krawczyk, Thomas Griesser
Optical waveguides have been fabricated via photopolymerization of stable, inkjet-printed patterns. In order to obtain high-profile lines, the properties of both the ink and the substrate were adjusted. We prove that suitable patterns, with contact angles close to 90˚, can be printed by using not fully cured, 'sticky' PDMS as a substrate. In addition, we propose a simple sliding-drop experiment to show the crucial difference in how the ink dewets the 'sticky' and the fully cured substrate, which is otherwise difficult to demonstrate...
January 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28093261/experimental-evaluation-of-a-new-morphological-approximation-of-the-articular-surfaces-of-the-ankle-joint
#19
Claudio Belvedere, Sorin Siegler, Andrea Ensini, Jason Toy, Paolo Caravaggi, Ramya Namani, Giulia Giannini, Stefano Durante, Alberto Leardini
The mechanical characteristics of the ankle such as its kinematics and load transfer properties are influenced by the geometry of the articulating surfaces. A recent, image-based study found that these surfaces can be approximated by a saddle-shaped, skewed, truncated cone with its apex oriented laterally. The goal of this study was to establish a reliable experimental technique to study the relationship between the geometry of the articular surfaces of the ankle and its mobility and stability characteristics and to use this technique to determine if morphological approximations of the ankle surfaces based on recent discoveries, produce close to normal behavior...
January 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28093047/3d-cell-printing-of-large-volume-tissues-application-to-ear-regeneration
#20
Jung-Seob Lee, Byung Soo Kim, Dong Hwan Seo, Jeong Hun Park, Dong-Woo Cho
The three-dimensional (3D) printing of large-volume cells, printed in a clinically relevant size, is one of the most important challenges in the field of tissue engineering. However, few studies have reported the fabrication of large-volume cell-printed constructs (LCCs). To create LCCs, appropriate fabrication conditions should be established: factors involved include fabrication time, residence time, and temperature control of the cell-laden hydrogel in the syringe to ensure high cell viability and functionality...
January 17, 2017: Tissue Engineering. Part C, Methods
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