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https://www.readbyqxmd.com/read/29667396/direct-printing-of-graphene-electrodes-for-high-performance-organic-inverters
#1
Aditi Naik, Jae Joon Kim, Özlem Usluer, D Leonardo Gonzalez Arellano, Ethan B Secor, Antonio Facchetti, Mark C Hersam, Alejandro L Briseno, James J Watkins
The scalable fabrication of high-resolution electrodes and interconnects is necessary to enable advanced, high-performance, printed and flexible electronics. Here, we demonstrate the direct printing of graphene patterns with feature widths from 300 µm to ~310 nm by liquid-bridge-mediated nanotransfer molding. This solution-based technique enables residue-free printing of graphene patterns on a variety of substrates with surface energies between ~43 and 73 mN m-1 . Using printed graphene source and drain electrodes, high-performance organic field-effect transistors (OFETs) are fabricated with single-crystal rubrene (p-type) and fluorocarbon-substituted dicyanoperylene-3,4:9,10-bis(dicarboximide) (PDIF-CN2 ) (n-type) semiconductors...
April 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29666797/development-and-implementation-of-a-perianesthetic-safety-checklist-in-a-veterinary-university-small-animal-teaching-hospital
#2
Gwennaëlle Menoud, Shannon Axiak Flammer, Claudia Spadavecchia, Mathieu Raillard
Introduction: The use of a surgical safety checklist is recommended by the World Health Organization and is associated with advantages: improved communication and reduced complications and mortality. Adapting checklists to the environment in which they are used improves their efficiency, but their implementation can be challenging. The aim of this study was to develop and implement a perianesthetic safety checklist for a small animal hospital. Materials and methods: A panel of eight anesthesia diplomates and seven residents and doctoral students were gathered...
2018: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29666244/spatial-determinants-of-quorum-signaling-in-a-pseudomonas-aeruginosa-infection-model
#3
Sophie E Darch, Olja Simoska, Mignon Fitzpatrick, Juan P Barraza, Keith J Stevenson, Roger T Bonnecaze, Jason B Shear, Marvin Whiteley
Quorum sensing (QS) is a bacterial communication system that involves production and sensing of extracellular signals. In laboratory models, QS allows bacteria to monitor and respond to their own cell density and is critical for fitness. However, how QS proceeds in natural, spatially structured bacterial communities is not well understood, which significantly hampers our understanding of the emergent properties of natural communities. To address this gap, we assessed QS signaling in the opportunistic pathogen Pseudomonas aeruginosa in a cystic fibrosis (CF) lung infection model that recapitulates the biogeographical aspects of the natural human infection...
April 17, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29665285/hemostatic-and-absorbent-polyhipe-kaolin-composites-for-3d-printable-wound-dressing-materials
#4
Benjamin C Streifel, Jeffrey G Lundin, Allix M Sanders, Karli A Gold, Thomas S Wilems, Sierra J Williams, Elizabeth Cosgriff-Hernandez, James H Wynne
A novel hemostatic and absorbent wound dressing material compatible with 3D printing is developed to address deficiencies in current wound dressing protocol. The design involves an open celled, microporous hydrogel foam via a high internal phase emulsion (HIPE) template with biocompatible components and tunable hemostatic character by kaolin loading, the viscosity and cure kinetics of which are tailored for 3D printing applications. The use of nontoxic mineral oil organic phase results in cytocompatability with human dermal fibroblasts...
April 17, 2018: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29664159/reading-aids-for-adults-with-low-vision
#5
REVIEW
Gianni Virgili, Ruthy Acosta, Sharon A Bentley, Giovanni Giacomelli, Claire Allcock, Jennifer R Evans
BACKGROUND: The purpose of low-vision rehabilitation is to allow people to resume or to continue to perform daily living tasks, with reading being one of the most important. This is achieved by providing appropriate optical devices and special training in the use of residual-vision and low-vision aids, which range from simple optical magnifiers to high-magnification video magnifiers. OBJECTIVES: To assess the effects of different visual reading aids for adults with low vision...
April 17, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29660703/fungal-bioleaching-of-wpcbs-using-aspergillus-niger-observation-optimization-and-kinetics
#6
Fariborz Faraji, Rabeeh Golmohammadzadeh, Fereshteh Rashchi, Navid Alimardani
In this study, Aspergillus niger (A. niger) as an environmentally friendly agent for fungal bioleaching of waste printed circuit boards (WPCBs) was employed. D-optimal response surface methodology (RSM) was utilized for optimization of the bioleaching parameters including bioleaching method (one step, two step and spent medium) and pulp densities (0.5 g L-1 to 20 g L-1 ) to maximize the recovery of Zn, Ni and Cu from WPCBs. According to the high performance liquid chromatography analysis, citric, oxalic, malic and gluconic acids were the most abundant organic acids produced by A...
April 13, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29660588/chemically-synthesized-butein-and-butin-optical-structure-and-electrochemical-redox-functionality-at-electrode-interface
#7
Priya Darshani, Manju Bhargavi Gumpu, Prasanth Thumpati, John Bosco Balaguru Rayappan, Velayutham Ravichandiran, Gururaja Perumal Pazhani, Murugan Veerapandian
Progress in the development of phytochemistry has delivered advancement in materials functionality for range of inter/trans-disciplinary application. Here, we investigated the structural functionality of chemically synthesized phytoconstitutent, chalcone (butein) and flavanone (butin). Photoactive and electroactive behavior of butein and butin were comprehensively studied using UV-vis absorbance, photoluminescence and cyclic voltammetric techniques. Surface morphology of the butein and butin powders was characterized from scanning electron microscope at an operating voltage of 10 kV...
April 6, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29660548/how-to-deal-with-the-empty-space-after-organ-removal-for-transplantation-a-single-medical-center-experience
#8
Ding-Ping Sun, Ling-Hsien Lee, Yu-Feng Tian, Hong-Xiang Zheng, Jinn-Rung Kuo, Che-Chuan Wang
PURPOSE: Dealing with the empty space after organ removal for transplantation has not been investigated. MATERIALS AND METHODS: From January 28, 2005, to November 21, 2017, 111 organ donors were enrolled in this study. They were divided into three groups: no replacement, replaced with paper printed with organ graphics, or replaced with 3D-printed simulated organs after the organs were removed at different periods. The donor's age, gender, etiology of admission, characteristic and clinical pictures, time interval between admission and the date of donation, and time interval between donor coordinator consultations were evaluated...
April 13, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29659132/3d-extrusion-printing-induces-polymer-molecule-alignment-and-cell-organization-within-engineered-cartilage
#9
Ting Guo, Julia P Ringel, Casey G Lim, Laura G Bracaglia, Maeesha Noshin, Hannah B Baker, Douglas A Powell, John P Fisher
Proper cell-material interactions are critical to remain cell function and thus successful tissue regeneration. Many fabrication processes have been developed to create microenvironments to control cell attachment and organization on a 3D scaffold. However, these approaches often involve heavy engineering and only the surface layer can be patterned. We found that 3D extrusion based printing at high temperature and pressure will result an aligned effect on the polymer molecules, and this molecular arrangement will further induce the cell alignment and different differentiation capacities...
April 16, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29656459/desktop-stereolithography-3d-printing-of-a-poly-dimethylsiloxane-based-material-with-sylgard-184-properties
#10
Nirveek Bhattacharjee, Cesar Parra-Cabrera, Yong Tae Kim, Alexandra P Kuo, Albert Folch
The advantageous physiochemical properties of poly(dimethylsiloxane) (PDMS) have made it an extremely useful material for prototyping in various technological, scientific, and clinical areas. However, PDMS molding is a manual procedure and requires tedious assembly steps, especially for 3D designs, thereby limiting its access and usability. On the other hand, automated digital manufacturing processes such as stereolithography (SL) enable true 3D design and fabrication. Here the formulation, characterization, and SL application of a 3D-printable PDMS resin (3DP-PDMS) based on commercially available PDMS-methacrylate macromers, a high-efficiency photoinitiator and a high-absorbance photosensitizer, is reported...
April 14, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29651999/photolithographic-stereolithographic-tandem-fabrication-of-4d-smart-scaffolds-for-improved-stem-cell-cardiomyogenic-differentiation
#11
Shida Miao, Haitao Cui, Margaret Nowicki, Se-Jun Lee, Jose Almeida, Xuan Zhou, Wei Zhu, Xiaoliang Yao, Fahed Masood, Michael W Plesniak, Muhammad Mohiuddin, Lijie Grace Zhang
4D printing is a highly innovative additive manufacturing process for fabricate smart structures with the ability to transform over time. Significantly different from regular 4D printing techniques, this study focuses on creating novel 4D hierarchical micropatterns using a unique photolithographic-stereolithographic-tandem strategy (PSTS) with smart soybean oil epoxidized acrylate (SOEA) inks for effectively regulating human bone marrow mesenchymal stem cell (hMSC) cardiomyogenic behaviors. The 4D effect refers to autonomous conversion of the surficial-patterned scaffold into a pre-designed construct through an external stimulus delivered immediately after printing...
April 13, 2018: Biofabrication
https://www.readbyqxmd.com/read/29651222/toward-3d-printed-hydrogen-storage-materials-made-with-abs-mof-composites
#12
Megan N Channell, Makfir Sefa, James A Fedchak, Julia Scherschligt, Michael Bible, Bharath Natarajan, Nikolai N Klimov, Abigail E Miller, Zeeshan Ahmed, Matthew R Hartings
The push to advance efficient, renewable, and clean energy sources has brought with it an effort to generate materials that are capable of storing hydrogen. Metal-organic framework materials (MOFs) have been the focus of many such studies as they are categorized for their large internal surface areas. We have addressed one of the major shortcomings of MOFs (their processibility) by creating and 3D printing a composite of acrylonitrile butadiene styrene (ABS) and MOF-5, a prototypical MOF, which is often used to benchmark H2 uptake capacity of other MOFs...
February 2018: Polymers for Advanced Technologies
https://www.readbyqxmd.com/read/29645056/electrochemical-hg-2-detection-at-tannic-acid-gold-nanoparticle-modified-electrodes-by-square-wave-voltammetry
#13
Alex L Suherman, Sabine Kuss, Eden E L Tanner, Neil P Young, Richard G Compton
We report the electrochemical sensing of Hg2+ based on tannic acid capped gold nanoparticle (AuNP@TA) complexes. At optimal conditions using square wave voltammetry, the presented analytical method exhibits a "measurable lower limit" of 100.0 fM. This limit is considerably below the permissible level of 30.0 nM for inorganic mercury in drinking water, specified by the World Health Organization (WHO). The effect of potentially interfering ions, such as Zn2+ and Al3+, was studied and results indicate an excellent selectivity for Hg2+...
April 12, 2018: Analyst
https://www.readbyqxmd.com/read/29625608/the-obesogenic-environment-around-elementary-schools-food-and-beverage-marketing-to-children-in-two-mexican-cities
#14
Simón Barquera, Lucia Hernández-Barrera, Stephen J Rothenberg, Enrique Cifuentes
BACKGROUND: Unhealthy environments and food advertisements are major determinants of childhood obesity. Recent regulation has banned unhealthy foods from schools in Mexico. However, currently there is no regulation limiting exposure to food marketing around schools. Thus, our objective was to analyze the characteristics of food advertising practices around 60 elementary schools in two cities and to evaluate compliance with the Pan American Health Organization (PAHO) recommendations and the local food industry self-regulatory marketing code...
April 7, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29619180/abnormal-room-temperature-phosphorescence-of-purely-organic-boron-containing-compounds-the-relationship-between-the-emissive-behaviorand-the-molecular-packing-and-the-potential-related-applications
#15
Zhaofei Chai, Can Wang, Jinfeng Wang, Fan Liu, Yujun Xie, Yong-Zheng Zhang, Jian-Rong Li, Qianqian Li, Zhen Li
Purely organic materials with the characteristic of room-temperature phosphorescence (RTP) under ambient conditions demonstrate potential benefits in advanced optoelectronic applications. Exploration of versatile and efficient RTP compounds with low prices is full of challenges due to the slow intersystem crossing process and ultrafast deactivation of the active excited states of organic compounds. Here, a series of boron-containing phosphors were found to present RTP with long-lived lifetimes. Among these commercially available and cheap compounds, (4-methoxyphenyl)boronic acid (PBA-MeO) exhibits long-lived RTP, with a lifetime of 2...
December 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29616212/a-new-porous-hybrid-material-derived-from-silica-fume-and-alginate-for-sustainable-pollutants-reduction
#16
Alessandra Zanoletti, Ivano Vassura, Elisa Venturini, Matteo Monai, Tiziano Montini, Stefania Federici, Annalisa Zacco, Laura Treccani, Elza Bontempi
In this work a new mesoporous adsorbent material obtained from a natural, high abundant raw material and a high volume industrial by-product is presented. The material is consolidated by the gelling properties of alginate and by decomposition of sodium-bicarbonate controlled porosity at low temperatures (70-80°C) at different scale lengths. The structural, thermal, and morphological characterization shows that the material is a mesoporous organic-inorganic hybrid. The material is tested as adsorbent, showing high performances...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29614431/3d-cell-printing-of-in-vitro-stabilized-skin-model-and-in-vivo-pre-vascularized-skin-patch-using-tissue-specific-extracellular-matrix-bioink-a-step-towards-advanced-skin-tissue-engineering
#17
Byoung Soo Kim, Yang Woo Kwon, Jeong-Sik Kong, Gyu Tae Park, Ge Gao, Wonil Han, Moon-Bum Kim, Hyungseok Lee, Jae Ho Kim, Dong-Woo Cho
3D cell-printing technique has been under spotlight as an appealing biofabrication platform due to its ability to precisely pattern living cells in pre-defined spatial locations. In skin tissue engineering, a major remaining challenge is to seek for a suitable source of bioink capable of supporting and stimulating printed cells for tissue development. However, current bioinks for skin printing rely on homogeneous biomaterials, which has several shortcomings such as insufficient mechanical properties and recapitulation of microenvironment...
March 23, 2018: Biomaterials
https://www.readbyqxmd.com/read/29611700/96x-screen-printed-gold-electrode-platform-to-evaluate-electroactive-polymers-as-marine-antifouling-coatings
#18
Hugues Brisset, Jean-François Briand, Raphaëlle Barry-Martinet, The Hy Duong, Pierre Frere, Frédéric Gohier, Philippe Leriche, Christine Bressy
Several alternatives are currently investigated to prevent and control the natural process of colonization of any seawater submerged surfaces by marine organisms. Since few years we develop an approach based on addressable electroactive coatings containing conducting polymers or polymers with lateral redox groups. In this article we describe the use of a screen-printed plate formed by 96 three-electrode electrochemical cells to assess the potential of these electroactive coatings to prevent the adhesion of marine bacteria...
April 3, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29611143/biospecimen-education-among-pacific-islanders-in-southern-california
#19
Nasya S Tan, Harold Custodio, Mandy LaBreche, Cleo Carlos Fex, Vanessa Tui'one May, Jane Ka'ala Pang, Victor Kaiwi Pang, Lola Sablan-Santos, Tupou Toilolo, Alisi Tulua, Dorothy Schmidt Vaivao, Melanie Sabado-Liwag, James Russell Pike, Bin Xie, Patchareeya P Kwan, Paula Healani Palmer, Sora Park Tanjasiri
Despite increasing rates of cancer, biospecimen donations for cancer research remains low among Pacific Islanders (PIs). To address this disparity, researchers partnered with PI community organizations to develop and test a theory-based culturally tailored educational intervention designed to raise awareness about the issues surrounding biospecimen research. A total of 219 self-identified PI adults in Southern California were recruited to participate in a one-group pre-post design study. Participants completed questionnaires that assessed their knowledge and attitude regarding biospecimen research before and after viewing an educational video and receiving print materials...
April 3, 2018: Journal of Cancer Education: the Official Journal of the American Association for Cancer Education
https://www.readbyqxmd.com/read/29609400/organic-inorganic-hybrid-microdisk-laser-with-dye-and-silica-mixed-doping-prepared-by-ink-jet-printing-method
#20
Yuya Mikami, Hiroaki Yoshioka, Soichiro Ryu, Naoya Nishimura, Yuji Oki
We developed an ink-jet printing method for fabricating inorganic microdisks at room temperature, which is much lower than the melting point of solid-state inorganic oxide, and have fabricated an organic-inorganic hybrid microdisk laser. Silica was used as the inorganic disk material, and microdisk-shaped aggregates were formed by the ink-jet printing method using a solution in which nanosilica particles were dispersed in propylene glycol monomethylether (PGME) solvent. Then, a microdisk capable of laser oscillation was also prepared by preliminarily adding the laser dye rhodamine 6G to the ink to form a mixed organic material...
March 19, 2018: Optics Express
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