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https://www.readbyqxmd.com/read/28335326/tuning-the-emission-energy-of-chemically-doped-graphene-quantum-dots
#1
Noor-Ul-Ain, Martin O Eriksson, Susann Schmidt, M Asghar, Pin-Cheng Lin, Per Olof Holtz, Mikael Syväjärvi, G Reza Yazdi
Tuning the emission energy of graphene quantum dots (GQDs) and understanding the reason of tunability is essential for the GOD function in optoelectronic devices. Besides material-based challenges, the way to realize chemical doping and band gap tuning also pose a serious challenge. In this study, we tuned the emission energy of GQDs by substitutional doping using chlorine, nitrogen, boron, sodium, and potassium dopants in solution form. Photoluminescence data obtained from (Cl- and N-doped) GQDs and (B-, Na-, and K-doped) GQDs, respectively exhibited red- and blue-shift with respect to the photoluminescence of the undoped GQDs...
November 3, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335292/a-tunable-photoluminescent-composite-of-cellulose-nanofibrils-and-cds-quantum-dots
#2
Qinwen Wang, Aimin Tang, Yuan Liu, Zhiqiang Fang, Shiyu Fu
The preparation of fluorescent nanocomposite materials with tunable emission wavelengths by combining cellulose nanofibrils (CNFs) with inorganic nanoparticles is important for promoting CNFs applications. A CNF/CdS nanocomposite was prepared via in situ compositing at room temperature on oxidized CNFs with CdS quantum dots. By controlling the -COOH/Cd(2+) ratio on the CNF, the feeding time of Na₂S and the ultrasonic maturing time, the size of the CdS quantum dots on the CNF surface could be adjusted so that to obtain the CNF/CdS nanocomposite material with different fluorescent colors...
September 7, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28319191/overt-orienting-of-spatial-attention-and-corticospinal-excitability-during-action-observation-are-unrelated
#3
Sonia Betti, Umberto Castiello, Silvia Guerra, Luisa Sartori
Observing moving body parts can automatically activate topographically corresponding motor representations in the primary motor cortex (M1), the so-called direct matching. Novel neurophysiological findings from social contexts are nonetheless proving that this process is not automatic as previously thought. The motor system can flexibly shift from imitative to incongruent motor preparation, when requested by a social gesture. In the present study we aim to bring an increase in the literature by assessing whether and how diverting overt spatial attention might affect motor preparation in contexts requiring interactive responses from the onlooker...
2017: PloS One
https://www.readbyqxmd.com/read/28301444/hemodynamic-and-cardiorespiratory-predictors-of-sport-rock-climbing-performance
#4
Simon Fryer, David Giles, Inmaculada Garrido Palomino, Alejandro de la O Puerta, Vanesa España Romero
Rock climbing performance has been suggested to involve a notable contribution from the aerobic metabolism. Previously it has been shown that forearm oxygenation kinetics can be used to distinguish ability groups and predict red-point sport climbing performance. Currently it is not known if forearm oxygenation kinetics, or a sport specific assessment of cardiorespiratory fitness best predicts sport rock climbing performance. The aim of the study was to determine whether forearm oxidative capacity index, maximal de-oxygenation (Δ score) during a treadwall V[Combining Dot Above]O[SUBSCRIPT TWO]peak test, treadwall V[Combining Dot Above]O[SUBSCRIPT TWO]peak, or running V[Combining Dot Above]O[SUBSCRIPT TWO]max best predicts self-reported sport climbing performance...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28296052/solid-confinement-of-quantum-dots-in-zif-8-for-efficient-and-stable-color-conversion-white-leds
#5
Wen Ying, Yiyin Mao, Xiaobing Wang, Yi Guo, Haihing He, Zhizhen Ye, Shuit-Tong Lee, Xinsheng Peng
The powder form and low photoluminescence quantum yield (PLQY) of fluorescent metal-organic frameworks (MOFs) present serious obstacle to fabricating high-efficiency film-like lighting devices. Here, we present a facile way to produce thin films of CdSexS1-x/ZnS quantum dots (QDs)@ZIF-8 with high PLQY by encapsulating red, green, and blue CdSexS1-x/ZnS QDs in ZIF-8 through a one-pot solid confinement conversion process. The QDs@ZIF-8 thin film emits warm white light with good color quality, and presents nice thermal stability and long-term duribility...
March 13, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28280914/differentiation-of-pityriasis-rubra-pilaris-from-plaque-psoriasis-by-dermoscopy
#6
N E Abdel-Azim, S A Ismail, E Fathy
Pityriasis rubra pilaris (PRP) and plaque psoriasis (PP) are two distinctive erythemato-squamous skin diseases that often have to be differentiated from each other and from other similar dermatoses. Dermoscopy has been proven to aid the clinical diagnosis of several inflammatory disorders, minimizing the need for skin biopsy. Our aim was to determine the dermoscopic patterns of PRP compared to PP and to assess the significance of certain dermoscopic criteria in the diagnosis of PRP. This case-control study included 11 patients with biopsy proven PRP and 25 patients with biopsy proven plaque psoriasis...
March 9, 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28269531/a-tunable-digital-ishihara-plate-for-pre-school-aged-children
#7
Orazio Gambino, Ester Minafo, Roberto Pirrone, Edoardo Ardizzone
Colors play a fundamental role for children, both in the everyday life and in education. They recognize the surrounding world, and play games making a large use of colors. They learn letters and numbers by means of colors. As a consequence, early diagnosis of color blindness is an crucial to support an individual affected by this visual perception alteration at the initial phase of his/her life. The diagnosis of red-green color deficiencies (protanopia or deuteranopia) is commonly accomplished by means of the Ishihara test, which consists of plates showing dots with different sizes where some of them compose numbers within a gamut of colors while the ones composing the background have different colors...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28264339/two-new-species-of-i-melanorivulus-i-cyprinodontiformes-cynolebiidae-from-rio-verde-drainage-upper-rio-paran%C3%A3-basin-brazil
#8
Matheus Vieira Volcan, Bruno Klotzel, Luis Esteban Krause Lanés
Two new species of the genus Melanorivulus are herein described from the middle Rio Verde drainage, upper Rio Paraná basin, Mato Grosso do Sul, Brazil. Both new species are members of the Melanorivulus pictus clade, diagnosed by having ventral process of angulo-articular vestigial and flanks intense greenish blue or greenish golden to purplish blue above anal fin base in males. Melanorivulus nigropunctatus, new species, from wetlands of a small drainage tributary of right side of the Rio Verde, differs from all other congeners by possessing black dots over the head and body in both sexes and pectoral fin orange with a dark grey margin in males...
February 21, 2017: Zootaxa
https://www.readbyqxmd.com/read/28261690/fluorescent-magnetic-multifunctional-carbon-dots-for-selective-separation-identification-and-eradication-of-drug-resistant-superbugs
#9
Avijit Pramanik, Stacy Jones, Francisco Pedraza, Aruna Vangara, Carrie Sweet, Mariah S Williams, Vikram Ruppa-Kasani, Sean Edward Risher, Dhiraj Sardar, Paresh Chandra Ray
The emergence of drug-resistant superbugs remains a major burden to society. As the mortality rate caused by sepsis due to superbugs is more than 40%, accurate identification of blood infections during the early stage will have a huge significance in the clinical setting. Here, we report the synthesis of red/blue fluorescent carbon dot (CD)-attached magnetic nanoparticle-based multicolor multifunctional CD-based nanosystems, which can be used for selective separation and identification of superbugs from infected blood samples...
February 28, 2017: ACS Omega
https://www.readbyqxmd.com/read/28256780/quantum-dot-light-emitting-diodes-for-large-area-displays-towards-the-dawn-of-commercialization
#10
REVIEW
Xingliang Dai, Yunzhou Deng, Xiaogang Peng, Yizheng Jin
Quantum dots are a unique class of emitters with size-tunable emission wavelengths, saturated emission colors, near-unity luminance efficiency, inherent photo- and thermal- stability and excellent solution processability. Quantum dots have been used as down-converters for back-lighting in liquid-crystal displays to improve color gamut, leading to the booming of quantum-dot televisions in consumer market. In the past few years, efficiency and lifetime of electroluminescence devices based on quantum dots achieved tremendous progress...
March 3, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28255896/cell-and-tissue-imaging-with-molecularly-imprinted-polymers
#11
Maria Panagiotopoulou, Stephanie Kunath, Karsten Haupt, Bernadette Tse Sum Bui
Advanced tools for cell imaging are of particular interest as they can detect, localize and quantify molecular targets like abnormal glycosylation sites that are biomarkers of cancer and infection. Targeting these biomarkers is often challenging due to a lack of receptor materials. Molecularly imprinted polymers (MIPs) are promising artificial receptors; they can be tailored to bind targets specifically, be labeled easily, and are physically and chemically stable. Herein, we demonstrate the application of MIPs as artificial antibodies for selective labeling and imaging of cellular targets, on the example of hyaluronan and sialylation moieties on fixated human skin cells and tissues...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28248646/filling-schemes-of-silver-dots-inkjet-printed-on-pixelated-nanostructured-surfaces
#12
Sheida Alan, Hao Jiang, Haleh Shahbazbegian, Jasbir N Patel, Bozena Kaminska
Recently, our group demonstrated an inkjet-based technique to enable high-throughput, versatile and full-colour printing of structural colours on generic pixelated nanostructures, termed as molded ink on nanostructured surfaces. The printed colours are controlled by the area of printed silver on the pixelated red, green and blue polymer nanostructure arrays. This paper investigates the behaviour of jetted silver ink droplets on nanostructured surfaces and the microscale dot patterns implemented during printing process, for achieving accurate and consistent colours in the printed images...
March 1, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28248399/temperature-dependent-optical-properties-of-lead-selenide-quantum-dot-polymer-nanocomposites
#13
Dennis L Waldron, Rebeckah Burke, Amanda Preske, Todd D Krauss, Joseph M Zawodny, Mool C Gupta
The optical properties of PbSe quantum dots (QDs) in AB9093 epoxy nanocomposite are examined with respect to temperature over a range of 0°C-80°C, a useful working range for many QD-based sensors and devices, and results are compared to QDs in toluene solution. A complete characterization of QD optical properties is provided as a function of temperature, including the absorption spectrum, first excitonic (1-s) absorption peak intensity and wavelength, fluorescence intensity, and peak wavelength. QD optical properties in toluene were found to be more sensitive to temperature as compared to those in AB9093...
March 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28245497/new-rules-for-visual-selection-isolating-procedural-attention
#14
Mahalakshmi Ramamurthy, Erik Blaser
High performance in well-practiced, everyday tasks-driving, sports, gaming-suggests a kind of procedural attention that can allocate processing resources to behaviorally relevant information in an unsupervised manner. Here we show that training can lead to a new, automatic attentional selection rule that operates in the absence of bottom-up, salience-driven triggers and willful top-down selection. Taking advantage of the fact that attention modulates motion aftereffects, observers were presented with a bivectorial display with overlapping, iso-salient red and green dot fields moving to the right and left, respectively, while distracted by a demanding auditory two-back memory task...
February 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28244726/graphene-oxide-quantum-dots-incorporated-into-a-thin-film-nanocomposite-membrane-with-high-flux-and-antifouling-properties-for-low-pressure-nanofiltration
#15
Chunfang Zhang, Kaifang Wei, Wenhai Zhang, Yunxiang Bai, Yuping Sun, Jin Gu
Graphene oxide quantum dots (GOQDs), novel carbon-based nanomaterials, have attracted tremendous research interest due to their unique properties associated with both graphene and quantum dots. In the present study, thin film nanocomposite (TFN) membranes comprising GOQDs dispersed within a tannic acid (TA) film were fabricated by an interfacial polymerization reaction for low-pressure nanofiltration (NF). The resultant TA/GOQDs TFN membranes had measurably smoother and more hydrophilic, negatively charged surfaces compared to the similarly formed TA thin film composite (TFC) membrane...
March 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28243491/pityriasis-lichenoides-et-varioliformis-acuta-in-skin-of-color-new-observations-by-dermoscopy
#16
Balachandra S Ankad, Savitha L Beergouder
BACKGROUND: Pityriasis lichenoides is an uncommon skin disease that presents in three different forms: pityriasis lichenoides et varioliformis acuta (PLEVA), pityriasis lichenoides chronica (PLC) and febrile ulceronecrotic-Mucha-Habermann disease. These represent a spectrum of a disease. PLEVA presents as skin eruption of multiple, small, red papules that develop into polymorphic lesions with periods of varying remissions, as well as possible sequels of hyper/hypopigmentation and varicella-like scars...
January 2017: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/28241668/color-tuned-and-transparent-colloidal-quantum-dot-solar-cells-via-optimized-multilayer-interference
#17
Ebuka S Arinze, Botong Qiu, Nathan Palmquist, Yan Cheng, Yida Lin, Gabrielle Nyirjesy, Gary Qian, Susanna M Thon
Colloidal quantum dots (CQDs), are a promising candidate material for realizing colored and semitransparent solar cells, due to their band gap tunability, near infrared responsivity and solution-based processing flexibility. CQD solar cells are typically comprised of several optically thin active and electrode layers that are optimized for their electrical properties; however, their spectral tunability beyond the absorption onset of the CQD layer itself has been relatively unexplored. In this study, we design, optimize and fabricate multicolored and transparent CQD devices by means of thin film interference engineering...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28227786/a-tunable-digital-ishihara-plate-for-pre-school-aged-children
#18
Orazio Gambino, Ester Minafo, Roberto Pirrone, Edoardo Ardizzone, Orazio Gambino, Ester Minafo, Roberto Pirrone, Edoardo Ardizzone, Ester Minafo, Edoardo Ardizzone, Roberto Pirrone, Orazio Gambino
Colors play a fundamental role for children, both in the everyday life and in education. They recognize the surrounding world, and play games making a large use of colors. They learn letters and numbers by means of colors. As a consequence, early diagnosis of color blindness is an crucial to support an individual affected by this visual perception alteration at the initial phase of his/her life. The diagnosis of red-green color deficiencies (protanopia or deuteranopia) is commonly accomplished by means of the Ishihara test, which consists of plates showing dots with different sizes where some of them compose numbers within a gamut of colors while the ones composing the background have different colors...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224970/an-improved-p300-pattern-in-bci-to-catch-user-s-attention
#19
Jing Jin, Hanhan Zhang, Ian Daly, Xingyu Wang, Andrzej Cichocki
OBJECTIVE: Brain-computer interfaces (BCIs) can help patients who have lost control over most muscles but are still conscious and able to communicate or interact with the environment. One of the most popular types of BCI is the P300-based BCI. With this BCI, users are asked to count the number of appearances of target stimuli in an experiment. To date, the majority of visual P300-based BCI systems developed have used the same character or picture as the target for every stimulus presentation, which can bore users...
February 22, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28219437/the-effect-of-a-test-ordering-software-intervention-on-the-prescription-of-unnecessary-laboratory-tests-a-randomized-controlled-trial
#20
Carlos Manuel Silva Martins, Andreia Sofia da Costa Teixeira, Luís Filipe Ribeiro de Azevedo, Luísa Maria Barbosa Sá, Paulo Alexandre Azevedo Pereira Santos, Maria Luciana Gomes Domingues do Couto, Altamiro Manuel Rodrigues da Costa Pereira, Alberto Augusto Oliveira Pinto Hespanhol, Cristina Maria Nogueira da Costa Santos
BACKGROUND: The way software for electronic health records and laboratory tests ordering systems are designed may influence physicians' prescription. A randomised controlled trial was performed to measure the impact of a diagnostic and laboratory tests ordering system software modification. METHODS: Participants were family physicians working and prescribing diagnostic and laboratory tests. The intervention group had a modified software with a basic shortcut menu changes, where some tests were withdrawn or added, and with the implementation of an evidence-based decision support based on United States Preventive Services Task Force (USPSTF) recommendations...
February 20, 2017: BMC Medical Informatics and Decision Making
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