180 research outputs found
Supplementary material for: When a sunny day gives you butterflies: an electrophysiological investigation of concreteness and context effects in semantic word processing
No full textsupplementary material, data and analysis code for ERP, reaction times and psycholinguistic ratings for Bechtold, Bellebaum & Ghio, 202
Supplementary material for: When a sunny day gives you butterflies: an electrophysiological investigation of concreteness and context effects in semantic word processing
No full textsupplementary material, data and analysis code for ERP, reaction times and psycholinguistic ratings for Bechtold, Bellebaum & Ghio, 202
Supplementary material for: When a sunny day gives you butterflies: an electrophysiological investigation of concreteness and context effects in semantic word processing
No full textsupplementary material, data and analysis code for ERP, reaction times and psycholinguistic ratings for Bechtold, Bellebaum & Ghio, 202
A systematic review on biomonitoring of individuals living near or working at solid waste incinerator plants
No full textBackground: Solid waste incinerators (SWI) emit several pollutants among which polychlorodibenzodioxins and furans (PCDD/Fs), polychlorobiphenyls, metals, monocyclic and polycyclic aromatic hydrocarbons (PAHs). Aim of the study: To present a systematic review of peer-reviewed literature on human biological monitoring of exposure and effect following potential exposure to SWI pollutants to bring together evidences and to highlight strengths and deficiencies of the studies conducted so far. Methods: Relevant studies on biomonitoring of individuals living near or working at SWIs were selected through three steps: (1) a literature search in the Medline, CAplus, and Embase database; (2) the retrieved abstracts were screened by four independent reviewers; (3) the full text of the relevant papers was read, papers were pooled in studies, and then analyzed to highlight strengths and weaknesses. Studies with the strongest epidemiological design and/or the largest sample size were identified as reference studies. Results: One hundred and thirty-two papers, pooled in 82 studies, were included in the review: 67 on general population, 52 on SWI workers, and 14 on both groups. The most frequently investigated biomarkers were PCDD/Fs in plasma (87). Several studies presented limitations, such as a small samples size, scarce information on confounders, and a poor statistical analysis. Some earlier studies showed an increase of PCDD/Fs, lead, and PAHs in individuals (mainly workers) exposed to emissions from old SWIs; studies from the year 2000 showed no increase of biomarkers or biomarkers within the range of the general population; decreasing trends were observed in prospective studies. Conclusions: Most studies presented methodological pitfalls; reference studies showed no or a limited evidence of the impact of SWI on exposure and effect biomarkers
Blase, Laura E. (Birth, 1883-02-12)
No full textAddress: E. Ave.805/Pg 228/1883/Wem. W/Ger./Ger./Agnes Bechtold,MidOriginal record filed in drawer labeled 'BLACK-BLEYER'
Warren, Edna Laura (Birth, 1885-02-22)
No full textAddress: Willow St.717/Pg 140/1885/F W/America/America/Agnes Bechtold,Mid.Original record filed in drawer labeled 'WARMAN- WEBENSTET'
Trace elements in toenails in a population living near a modern municipal solid waste incinerator in Modena (Italy)
No full textBackground and objectives: A cross-sectional biomonitoring study was performed in Modena (Italy) to assess trace element levels in toenails in a population living near a municipal solid waste incinerator (SWI), and investigate potential differences in their concentrations according to SWI emission exposure and other environmental and behavioral factors.
Methods: During the winter 2013/14 eligible subjects, aged 18e69 yrs, living within 4 km from SWI, were randomly selected from the population register. Toxic and essential element concentrations (As, Cd, Cr, Cu, Mn, Ni, Pb, Se, Zn) were analyzed in 489 toenail samples. Individual exposure to SWI emissions was estimated by using, as a tracer, fall-out maps of emitted particulate matter. Information on anthropometric parameters, lifestyles, diet, and road traffic, residential and work exposures were collected by questionnaires and objective measurements. Multivariate logistic regression analyses were carried out, separately for females and males.
Results: Excluding As, toxic elements were found, usually at low levels, in many samples, while essential elements, especially Cu and Zn, showed higher levels. Overall, no clear relationships between element levels and SWI exposure were observed, whereas associations with other environmental and lifestyle factors were found, including local food consumption, smoking and occupation.
Conclusions: The low pollutant concentrations measured in SWI emissions could explain the absence of clear patterns in toenail levels across SWI exposure levels. The associations observed with other factors suggest that, at least in this specific population, other environmental exposures and personal behaviors could act as more important predictors of trace element uptake
Cristais líquidos discóticos como semicondutores orgânicos para aplicações eletrônicas
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Física, Florianópolis, 2014Nota: Prêmio UFSC de tese 2015Os cristais líquidos (CLs) têm sido reconhecidos recentemente como promissores semicondutores para aplicações na área de eletrônica orgânica. O presente trabalho apresenta a proposta de caracterizar e investigar a potencialidade de novos materiais orgânicos com propriedades líquido-cristalinas para aplicações em dispositivos eletrônicos. Moléculas discóticas constituídas de um centro rígido aromático e cadeias laterais flexíveis vêm sendo amplamente estudada se aplicadas em dispositivos orgânicos tais como os diodos emissores de luz (OLEDs), os transistores de efeito de campo (OFETs) e os fotovoltaicos. Os CLs aliam a organização molecular dos sistemas cristalinos, necessária ao trânsito das cargas, à fluidez de um líquido, facilitando o processamento do material. Eles podem ser processados tanto a partir de solução quanto por evaporação térmica. A principal vantagem na utilização destes materiais é a possibilidade de modificar e controlar a orientação molecular através de estímulos externos, como por exemplo, pela ação de temperatura, aplicação de campos elétrico ou magnético e através de tratamentos de superfície. Com isso pode-se otimizar as suas propriedades ópticas e elétricas. Os CLs discóticos estudados neste trabalho são derivados do centro aromático perileno. Os materiais com o centro perileno vêm sendo empregados como semicondutores tipo-n e têm apresentado elevada mobilidade de carga quando aplicados em dispositivos. Neste trabalho as propriedades mesomórficas, fotofísicas, eletroquímicas e elétricas dos compostos foram investigadas. O comportamento termotrópico dos compostos foi analisado por microscopia óptica de luz polarizada(MOLP), calorimetria diferencial de varredura (DSC) e difração de raio x (DRX). As propriedades fotofísicas foram investigadas através de espectroscopia UV-Vis e espectroscopia de fluorescência. A caracterização morfológica dos filmes finos produzidos pela técnica despin-coating e evaporação térmica foi realizada usando um microscópio de força atômica (AFM). Os níveis de energia LUMO dos compostos foram estimados através da técnica de voltametria cíclica. As propriedades fotofísicas em função da temperatura mostraram uma significativa supressão da fotoluminescência na mesofase colunar causada pela forte agregação molecular do empacotamento p-stacking. As propriedades elétricas foram investigadas através da deposição dos filmes em uma típica estrutura de diodo, ITO/PEDOT:PSS/CL/Ca/Al. A mobilidade de carga foi estudada através da aplicação de um modelo teórico às curvas experimentais de densidade de corrente em função da voltagem aplicada (J/V) e comparada com a mobilidade eletrônica obtida através das técnicas de tempo de voo (TOF) e Foto-CELIV. O alinhamento homeotrópico induzido por tratamento térmico para o composto com o centro perileno diimida resultou em propriedades elétricas aprimoradas, onde foi observado um ganho de quatro ordens de grandeza para a densidade de corrente e cinco ordens de grandeza para a mobilidade. O filme fino produzido pelo processo de evaporação térmica deste composto também apresentou propriedades elétricas notáveis na estrutura de diodo, sendo superior ao desempenho do filme produzido por spin-coating antes do alinhamento. A mobilidade para o filme evaporado foi medida através da estrutura de um transistor e mostrou boa concordância com a mobilidade obtida a partir do modelo aplicado às curvas J/V. A mobilidade para o filme evaporado foi superior a mobilidade encontrada para o filme spin-coating antes do alinhamento, mas inferior a mobilidade exibida pelo filme spin-coating alinhado homeotropicamente na estrutura de diodo. Os dispositivos produzidos a partir da combinação dos dois CLs, em heterojunções de bicamada e de volume, apresentaram um melhor desempenho do que os dispositivos fabricados para os compostos individualmente.Abstract: Liquid crystals (LCs) have been recently recognized as promising semiconductors for applications in the field of organic electronics. This work presents a proposal to characterize and investigate the potential application of new organic materials with liquid-crystalline properties inelectronic devices. Discotic molecules comprising a rigid aromatic core and flexible side chains have been widely studied and applied to organic devices such as light emitting diodes (OLEDs), field effect transistors (OFETs) and photovoltaics. LCs combine the molecular organization of the crystalline systems necessary to the transit of the charge and the fluidity of a liquid, facilitating processing of the material. They can be processed either from solution or by thermal evaporation. The main advantage of using these materials is the possibility of modifying and controlling the molecular orientation by external stimuli, for example, by the action of temperature, applying electric or magnetic fields and through surface treatments. Being possible to optimize their optical and electrical properties.The discotic LCs studied in this work are derivatives of the perylene aromatic core. Materials with perylene core have been used as n-type semiconductors and have shown high mobility of charge when applied to devices. In this work the mesomorphic, photophysical, electrochemical and electrical properties of the compounds were investigated. The thermotropic behavior of the compounds was analyzed by optical polarized light microscopy (MOLP), differential scanning calorimetry (DSC) and x-ray diffraction (XRD). The photophysical properties were investigated by UV-Vis and fluorescence spectroscopy. Morphological characterization of the thin films produced by the technique of spin-coating and thermal evaporation was performed using an atomic force microscope (AFM). The LUMO energy levels of the compounds were estimated using the technique of cyclic voltammetry. The photophysical properties as a function of temperature showed a significant suppression of photoluminescence in the columnar mesophase due to the molecular aggregates caused by the strong p-stacking interactions. The electrical properties were investigated by depositing the films in a typical diode structure, ITO/PEDOT:PSS/CL/Ca/Al. The charge mobility was investigated by applying a theoretical model to experimental curves of the current density as a function of applied voltage (J/V) and compared with the electron mobility obtained by the techniques of time of flight (TOF) and Photo-CELIV. The homeotropic alignment induced by annealing for the compound perylene diimide resulted in improved electrical properties, where a gain of four orders of magnitude for the current density and five orders of magnitude in the mobility was observed. The thin film produced by thermal evaporation process of this compound also showed remarkable electrical properties in a diode structure. It was superior to the performance of the film produced by spin-coating before alignment. Mobility for the evaporated film was measured in a transistor structure and showed good agreement with the mobility obtained from the model applied to curves J/V. The mobility for the evaporated film was higher than the mobility for the spin-coating before alignment, but it was lower than the mobility exhibited by the spin-coating film after annealing in a diode structure. The devices produced from the combination of the two LCs in bilayer and bulk heterojunctions showed better performance than devices manufactured for the compounds individually
MUSC Department of Psychiatry and Behavioral Sciences, interns, 1999-2000
No full textThis photograph features the interns, 1999-2000, of the Charleston Consortium Psychology Internship Training Program of the Medical University of South Carolina Department of Psychiatry and Behavioral Sciences. Pictured from left to right, seated: Patrick Duffy, Adrienne Fricker, Lilia Cortina, Lauren Maxim, Matt Gray, and Jon Elhai; and back row: Martin Binks, Karen Cusack, Kristina Hardy, George Gaither, Laura Juliano, Dr. Dean Kilpatrick, Elizabeth Tatiano, Jyothilakshmi Vayalakkara, Sonja Batten, and Kate Bechtold
Supplemental materials for preprint: That means something to me: the effect of linguistic and emotional experience on the acquisition and processing of novel abstract concepts
No full text- …
