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https://www.readbyqxmd.com/read/29160774/etchant-free-transfer-of-2d-nanostructures
#1
Fu Zhang, Chad Erb, Lauren Runkle, Xiaotian Zhang, Nasim Alem
The effective use of the van der Waals 2D materials relies on their successful transfer from the growth substrate onto other target substrates in the form of large films or flakes. In particular, it is important to transfer such atomically thin samples to various substrates with minimal sample damage and exposure to etchants and chemicals to realize their applications. Here we develop a universal transfer method that not only is free of reactive etchants, but also can maintain the film morphology intact with no tears and cracks...
November 21, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29160710/evaporation-dynamics-of-mixed-nanocolloidal-sessile-droplets
#2
Binita Pathak, Sandeep Hatte, Saptarshi Basu
Evaporation dynamics of a particle laden droplet has been a topic of interest in recent times due to its widespread applications, ranging from surface patterning to drug delivery systems. The interplay of evaporation induced internal flow dynamics, contact line dynamics and nanoparticle self-assembly govern the morphologies of the residual structures. Fine tuning of these residual structures is thus possible by controlling the governing parameters. A nanoparticle laden sessile droplet placed on a hydrophobic substrate undergoes buckling phenomenon which results in a dome-like structure with cavity on the surface...
November 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29160118/the-effectiveness-of-a-classroom-based-phonological-awareness-program-for-4-5-year-olds
#3
Chrissy Kelly, Suze Leitão, Karen Smith-Lock, Brody Heritage
PURPOSE: Numerous studies have reported a robust relationship between early phonological awareness (PA) and subsequent reading achievement, in addition to the critical role of the alphabetic principle in predicting and supporting later reading and spelling development. Given this association, there has been an increasing push to teach these skills to young children prior to word level reading and spelling instruction. This study evaluated the effectiveness of the Cracking the Code (CtC) program with students aged 3;8-5;4...
November 21, 2017: International Journal of Speech-language Pathology
https://www.readbyqxmd.com/read/29156620/stretchable-highly-durable-ternary-nanocomposite-strain-sensor-for-structural-health-monitoring-of-flexible-aircraft
#4
Feng Yin, Dong Ye, Chen Zhu, Lei Qiu, YongAn Huang
Harmonious developments of electrical and mechanical performances are crucial for stretchable sensors in structural health monitoring (SHM) of flexible aircraft such as aerostats and morphing aircrafts. In this study, we prepared a highly durable ternary conductive nanocomposite made of polydimethylsiloxane (PDMS), carbon black (CB) and multi-walled carbon nanotubes (MWCNTs) to fabricate stretchable strain sensors. The nanocomposite has excellent electrical and mechanical properties by intensively optimizing the weight percentage of conducting fillers as well as the ratio of PDMS pre-polymer and curing agent...
November 20, 2017: Sensors
https://www.readbyqxmd.com/read/29154720/a-crack-in-the-wall-of-competition-will-compassion-prevail
#5
Sharon F Terry
No abstract text is available yet for this article.
November 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/29153001/understanding-parents-concerns-about-their-children-with-autism-taking-public-school-transportation-in-los-angeles-county
#6
Amber M Angell, Olga Solomon
There are a number of recent US news media reports of children and youth with autism becoming lost, injured, or even dying while taking public school transportation, yet research on this problem is scarce. This ethnographic study examines the experiences of 14 parents whose children with autism take public school transportation in Los Angeles County. We present two case studies of children with autism being "lost" while in transit from school to home on the bus to (1) describe how the situation was experienced, responded to, and managed by the parents; (2) consider three interrelated themes that emerged from interviews with 14 parents, related to children's safety, independence, and participation, across multiple contexts and analytic levels; and (3) discuss the findings in relation to US news media reports of incidents involving children with autism on school buses to identify specific weaknesses in school transportation infrastructure, particularly in the context of privatization, that create conditions in which children with autism can "fall through the cracks" in potentially life-threatening ways...
February 1, 2017: Autism: the International Journal of Research and Practice
https://www.readbyqxmd.com/read/29151615/effect-of-doping-of-kdp-crystal-with-amino-acid-l-arginine-on-the-strength-properties-and-character-of-laser-damage
#7
E F Dolzhenkova, E I Kostenyukova, O N Bezkrovnaya, I M Pritula
Studied were the strength characteristics of KDP crystals doped with l-arginine under a concentrated load and irradiation of the first harmonic YAG:Nd(3+) laser. The crystals were obtained by means of the temperature reduction method on a point seed, the content of l-arginine in the aqueous solution being 0.3, 0.4, 1.0 and 1.4 wt%. The character of the dependence of KDP microhardness versus the concentration of amino acid in the crystal was investigated. The regularities of brittle damage of the doped KDP crystal at mechanical testing and laser irradiation were shown to be similar...
November 15, 2017: Journal of Crystal Growth
https://www.readbyqxmd.com/read/29149724/peri-ultrasound-modeling-for-surface-wave-propagation
#8
Mohammad Hadi Hafezi, Tribikram Kundu
The interaction between surface wave and a surface breaking crack is studied using a novel fast modeling tool called peri-ultrasound that can model both linear and nonlinear ultrasonic response. This modeling approach is based on peridynamic theory. In this study, the surface wave is modeled by applying a triangular pulse excitation function on the surface of a large structure. The particle movements are simulated on both sides of the surface crack to investigate transmitted and reflected fields. This investigation shows that: (1) the computed amplitude spectra of the Rayleigh wave agrees with the experimental observation; and (2) the structure containing a surface breaking crack shows noticeable increase in its nonlinear behavior...
November 7, 2017: Ultrasonics
https://www.readbyqxmd.com/read/29146393/cracking-the-clinician-educator-code-in-gastroenterology
#9
Jordan M Shapiro, Milena Gould Suarez, Teri Lee Turner
No abstract text is available yet for this article.
December 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29145862/l161982-alleviates-collagen-induced-arthritis-in-mice-by-increasing-treg-cells-and-down-regulating-interleukin-17-and-monocyte-chemoattractant-protein-1-levels
#10
Liang Chen, Xianglei Wu, Jun Zhong, Dongqing Li
BACKGROUND: To investigate the effects and potential mechanism of L161982 (a kind of EP4 antagonist) on the collagen-induced arthritis (CIA) mice model. METHODS: The CIA mice model were first established by immunizing with Chicken Type II Collagen on DBA/1 mice. The CIA groups were administered once a day for 2 weeks with either 5 mg/kg L161982 by intraperitoneal injections (IP), 200 U celecoxib by intragastrical injections, or 100 μl PBS (IP). At the end of the study, total arthritis score and histopathologic examination were assessed to determine CIA severity...
November 16, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29145651/cracks-in-the-case-against-epidural-steroids-examining-the-evidence-for-vertebral-fracture-risk
#11
Tina L Doshi, Steven P Cohen
No abstract text is available yet for this article.
November 14, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/29145126/pyrolysis-gasification-of-pine-sawdust-biomass-briquettes-under-carbon-dioxide-atmosphere-study-on-carbon-dioxide-reduction-utilization-and-biochar-briquettes-physicochemical-properties
#12
Zewei Liu, Fengxia Zhang, Huili Liu, Fei Ba, Sijia Yan, Jianhang Hu
In this paper, the effects of temperature and CO2 content on CO2 reduction (utilization) efficiency and physicochemical properties of pyrolysis/gasification biochar briquettes were investigated. The CO2 reduction (utilization) efficiency (CRE) reached the peak value of 74.9% in a 10% CO2/90% N2 atmosphere at 600 °C. The crackings of hydroxyl, CC bonds, methyl and methylene groups of biochars briquette were enhanced by high temperature and CO2. The increase of CO2 concentration was beneficial for developing biochar microporosity, but not conductive to enhance higher heating value, volume density and durability of biochar briquette...
November 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29145116/conversion-of-sweet-potato-waste-to-solid-fuel-via-hydrothermal-carbonization
#13
Xinfei Chen, Xiaoqian Ma, Xiaowei Peng, Yousheng Lin, Zhongliang Yao
Hydrothermal carbonization (HTC) of sweet potato waste was performed to investigate the effect of process parameters including reaction temperature (180-300 °C) and residence time (0-120 min) on the characteristics of hydrochars. The results showed that the increase of reaction temperature and residence time both decreased the yield of hydrochars. With the increase of reaction temperature and residence time, the carbon content of hydrochars increased, while the hydrogen and oxygen contents decreased. The lower H/C and O/C ratios indicated that dehydration and decarboxylation reactions occurred during HTC...
November 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29144426/experimental-exploration-of-metal-cable-as-reinforcement-in-3d-printed-concrete
#14
Freek P Bos, Zeeshan Y Ahmed, Evgeniy R Jutinov, Theo A M Salet
The Material Deposition Method (MDM) is enjoying increasing attention as an additive method to create concrete mortar structures characterised by a high degree of form-freedom, a lack of geometrical repetition, and automated construction. Several small-scale structures have been realised around the world, or are under preparation. However, the nature of this construction method is unsuitable for conventional reinforcement methods to achieve ductile failure behaviour. Sometimes, this is solved by combining printing with conventional casting and reinforcing techniques...
November 16, 2017: Materials
https://www.readbyqxmd.com/read/29143067/characterization-and-fine-mapping-of-qkc7-03-a-major-locus-for-kernel-cracking-in-maize
#15
Mingtao Yang, Lin Chen, Xun Wu, Xing Gao, Chunhui Li, Yanchun Song, Dengfeng Zhang, Yunsu Shi, Yu Li, Yong-Xiang Li, Tianyu Wang
A major locus conferring kernel cracking in maize was characterized and fine mapped to an interval of 416.27 kb. Meanwhile, combining the results of transcriptomic analysis, the candidate gene was inferred. Seed development requires a proper structural and physiological balance between the maternal tissues and the internal structures of the seeds. In maize, kernel cracking is a disorder in this balance that seriously limits quality and yield and is characterized by a cracked pericarp at the kernel top and endosperm everting...
November 15, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29142882/incidence-of-apical-crack-formation-and-propagation-during-removal-of-root-canal-filling-materials-with-different-engine-driven-nickel-titanium-instruments
#16
Taha Özyürek, Vildan Tek, Koray Yılmaz, Gülşah Uslu
Objectives: To determine the incidence of crack formation and propagation in apical root dentin after retreatment procedures performed using ProTaper Universal Retreatment (PTR), Mtwo-R, ProTaper Next (PTN), and Twisted File Adaptive (TFA) systems. Materials and Methods: The study consisted of 120 extracted mandibular premolars. One millimeter from the apex of each tooth was ground perpendicular to the long axis of the tooth, and the apical surface was polished...
November 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29140478/comparison-of-cocaine-crack-biomarkers-concentrations-in-oral-fluid-urine-and-plasma-simultaneously-collected-from-drug-users
#17
Taís Regina Fiorentin, Juliana Nichterwitz Scherer, Marcelo Caetano Alexandre Marcelo, Tanara Rosângela Vieira Sousa, Flavio Pechansky, Marco Flôres Ferrão, Renata Pereira Limberger
The use of oral fluid (OF) as an alternative specimen for drug analysis has become very popular in forensic toxicology. Many clinical studies have evaluated the correlations between concentrations of cocaine and its metabolites in OF and other matrices, but results have shown high variability. In addition, there are no data available regarding the correlations between biomarkers of crack-cocaine use in different matrices. This study evaluated the relationship between concentrations of cocaine/crack-cocaine biomarkers in OF, urine and plasma samples collected from cocaine users...
November 13, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29140284/crack-propagation-calculations-for-optical-fibers-under-static-bending-and-tensile-loads-using-continuum-damage-mechanics
#18
Yunxia Chen, Yuxuan Cui, Wenjun Gong
Static fatigue behavior is the main failure mode of optical fibers applied in sensors. In this paper, a computational framework based on continuum damage mechanics (CDM) is presented to calculate the crack propagation process and failure time of optical fibers subjected to static bending and tensile loads. For this purpose, the static fatigue crack propagation in the glass core of the optical fiber is studied. Combining a finite element method (FEM), we use the continuum damage mechanics for the glass core to calculate the crack propagation path and corresponding failure time...
November 15, 2017: Sensors
https://www.readbyqxmd.com/read/29140093/early-diagnosis-and-treatment-of-asymptomatic-vertical-enamel-and-dentin-cracks
#19
Samer S Alassaad
Asymptomatic vertical enamel and dentin cracks can lead to multiple pathologic consequences ranging from caries to pulpal involvement, periodontal involvement, complete tooth fracture, and tooth loss if intervention is postponed. Early diagnosis, using magnification, tactile examination, transillumination, and dyes, and early restorative and occlusal treatments can be incorporated into daily practice to prevent further crack propagation before asymptomatic cracks become symptomatic and cause further damage to the dentition and surrounding tissues...
November 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/29138908/amine-modified-magnetic-iron-oxide-nanoparticle-as-a-promising-carrier-for-application-in-bio-self-healing-concrete
#20
Mostafa Seifan, Alireza Ebrahiminezhad, Younes Ghasemi, Ali Khajeh Samani, Aydin Berenjian
Self-healing mechanisms are a promising solution to address the concrete cracking issue. Among the investigated self-healing strategies, the biotechnological approach is distinguished itself by inducing the most compatible material with concrete composition. In this method, the potent bacteria and nutrients are incorporated into the concrete matrix. Once cracking occurs, the bacteria will be activated, and the induced CaCO3 crystals will seal the concrete cracks. However, the effectiveness of a bio self-healing concrete strictly depends on the viability of bacteria...
November 14, 2017: Applied Microbiology and Biotechnology
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