Extraordinary sensitivity of the electronic structure and properties of single-walled carbon nanotubes to molecular charge-transfer

Interaction of single-walled carbon nanotubes with electron donor and acceptor molecules causes significant changes in the electronic and Raman spectra, the relative proportion of the metallic species increasing on electron donation through molecular charge transfer, as also verified by electrical resistivity measurements.Comment: 15 pages, 5 figurre

Coachella

Das Coachella Valley Music and Arts Festival ist eines der größten und beliebtesten Musikfestivals der Vereinigten Staaten. Es findet seit 1999 jährlich (bis auf das Jahr 2000, als es aus Finanzierungsproblemen ausfallen musste) auf dem Gelände des Empire Polo Club in Indio (Kalifornien) statt und erreicht mittlerweile eine Größe von 100.000 Besuchern. Auf mehreren Bühnen treten an zwei bis drei Tagen internationale Bands aus den verschiedensten Musikgenres auf, von HipHop über Indie-Rock bis hin zu Electro. Auch der Bekanntheitsgrad der auftretenden Künstler rangiert von Newcomern hin zu internationalen Top Acts wie Coldplay, den Red Hot Chili Peppers oder Oasis. Außerdem präsentieren Künstler auf dem Festivalgelände zahlreiche Skulpturen und Installationen

Tipos, organização e visibilidade de informações em páginas iniciais de websites de universidades brasileiras

The aim of this study is to investigate the relationship between the type of information available on website homepages of Brazilian universities and how it is organized. That is, to verify the visibility given to each type of information through the area used in the opening pages of the chosen universities’ websites, to identify the universities' vision of their websites, and also, to relate types of information available and types of organization in its opening pages. For this, the article discusses Information Architecture, the presence of universities on the web and the role of its homepages. The motivation of this research is based on identifying a pattern for the information organized on universities websites, since these aggregate content for different target audiences. The universities selected as research object were the Brazilian top ten in the Webometrics Ranking of World Universities in July 2010. [...]Apresenta pesquisa realizada com o objetivo de investigar a relação entre o tipo de informação disponibilizada nas páginas iniciais de websites de universidades brasileiras e a forma como ela está organizada. Para tanto, teve como objeto as dez primeiras universidades brasileiras no Webometrics Ranking of World Universities de julho de 2010. Foram analisadas as capturas de telas das páginas iniciais e a resposta a três questões abertas feitas aos setores de comunicação das universidades.

Das Bild von Familie: zur Anwendung und Auswertung von Familienskulpturen im Rahmen biografischer Fallrekonstruktionen

In diesem Beitrag wird die methodische Kombination biografisch-narrativer Interviews mit Familienskulpturen vorgestellt. In Abgrenzung zu Skulpturen, in denen Personen aufgestellt werden, wird hierbei auf ein der systemischen Beratung und Therapie entlehntes Verfahren Bezug genommen, in dem ein Beziehungsgeflecht mit grafischen Mitteln symbolisch dargestellt wird. Wie das von der interviewten Person angefertigte Bild ihres Familiensystems im Rahmen rekonstruktiver Forschung eingesetzt und ausgewertet werden kann, wird in diesem Artikel methodologisch und praxisbezogen diskutiert und mit zwei Fallbeispielen illustriert. Es wird dabei deutlich, dass diese Methode die rekonstruktive Biografie- und Familienforschung um einen bildhaften Zugang zu Qualität und Struktur innerfamilialer Beziehungen bereichert und ein Verstehen und Erklären eines Familiensystems und dem sich hierin reproduzierendem Wissen zulässt.This paper presents the methodical combination of biographical-narrative interviews with family sculptures. In contrast to sculptures, in which people are placed, family sculpting means in this case a systemic counselling and therapy technique in which relationships are symbolically represented with graphical elements. This article discusses methodologically and practically how the figure of a family system, made by the interviewed person, can be used and analyzed in reconstructive family and biographical research in what form these method combination can take place. This is illustrated with two case studies and it reveals that this method enriches the reconstructive biographical and family research with a pictorial approach to quality and structure of intrafamilial relations and helps understanding and explaining family systems

Recovery of the Fish Population of a Municipal Wastewater Dominated, North Texas Creek After a Major Chlorine Disturbance

This study evaluated the effects of a major chlorine disturbance on fish communities in Pecan creek by the City of Denton's Pecan Creek Water Reclamation Plant. Fish communities in Pecan Creek were sampled using a depletion methodology during February, April, July, and November, 1999. February and April sampling events showed that the fish communities were severely impacted by the chlorine. Sampling during July and November showed fish communities recovered in Pecan Creek. The first-twenty minutes of shocking and seining data were analyzed to mirror an equal effort methodology. This methodology was compared to the depletion methodology to see if the equal effort methodology could adequately monitor the recovery of Pecan Creek after the chlorine disturbance. It was determined that the equal effort methodology was capable of monitoring the recovery of Pecan Creek, but could not accurately represent the fisheries community as well as the depletion method. These data using the twenty-minute study were compared to a previous study. Results of this study were similar to those found in a previous study, although fish communities were more severely impacted and took longer to recover

Desenvolvimento e caracterização de anfissoma com derivado de cloroacetamida para tratamento antifúngico

As infecções fúngicas são um problema crescente para a saúde pública, pois estão relacionadas diretamente com aumento da incidência das taxas de morbidade e mortalidade. O diagnóstico para essas infecções nem sempre se apresenta de forma confiável e adequada, necessitando de tratamento antifúngico que, gradativamente, demonstra-se ineficiente. Os antifúngicos disponíveis possuem diversos relatos de toxicidade ao paciente, além disso, a seleção de isolados fúngicos resistentes vem aumentando consideravelmente. Sendo assim, é necessária a ampliação de opções terapêuticas para tratamento antifúngico adequado e mais eficaz. Os derivados de cloroacetamidas juntamente com a nanotecnologia demonstram ser uma alternativa promissora. Por essa razão, o objetivo deste trabalho foi desenvolver uma formulação nanotecnológica, denominado anfissomas, contendo um derivado de cloroacetamida (CBr), com intuito de avaliar o perfil antifúngico deste sistema e propor uma alternativa de tratamento contra candidíases e dermatofitoses. Os anfissomas desenvolvidos apresentaram tamanho e distribuição, pH, teor e taxa de incorporação adequados. Os valores das concentrações inibitórias mínimas (CIM’s) apresentam-se na faixa de 6,25 a 25,00 μg/mL para os anfissomas, contendo CBr, frente às cepas dermatofíticas. Observou-se prevalente diminuição da CIM quando o composto foi incorporado à nanoformulação, indicando que a nanotecnologia pode ser uma alternativa promissora para tratamento de infecções fúngicas.Fungal infections are a growing problem for public health because they are related to the increase of morbidity and mortality. The diagnosis of these infections is not always trustworthy and accurate and its antifungal treatment gradually shows to be inefficient. Several toxicity cases have been associated with antifungal treatment and antifungal drug resistance have been increasing over the years. Therefore, it is necessary to broaden the therapeutic options aiming at an adequate and efficient antifungal treatment. Chloroacetamide derivatives along with nanotechnology seems to be a promising option. Thus, the aim of this study was to develop nanotechnology formulation, entitled anfisomes, loaded with a chloroacetamide derivative (CBr) and to evaluate the antifungal profile of this nanosystem and offer a new option for the treatment of candidiasis and dermatophytosis. The developed amphisome presented particle size and size distribution within the nanoscale, pH suitable for skin application and high drug content and incorporation rate. The minimum inhibitory concentrations (MICs) showed ranged of 6,25 to 25,00 μg/mL for the drug-loaded anfisomes, for the dermatophytic strains there was a decrease of the MICs when the drug was loaded into the nanosystem. It was observed the prevalence of MIC reduction when the CBr compound was incorporated into the nanoformulation, indicating that nanotechnology could be a promising option for antifungal treatment

Modelo dinâmico implicitamente estocástico para otimizar a operação do sistema elétrico integrado da república do Panamá

O modelo de otimização proposto almeja minimizar o custo de operação das usinas térmicas complementares às hidrelétricas do Sistema Integrado de Energia Elétrica da República do Panamá. Ele está formado pela combinação de um modelo estocástico com um modelo de decisão. O modelo de decisão está formulado com programação dinâmica discreta, onde os estágios são as semanas, a variável de estado é a energia armazenada no Lago Bayano e a variável de decisão e nal da hidrelétrica deste lago. A geraçao sem a método desenvolvido demonstrou suas vantagens sobre os tradicionais implicitamente estocásticos, por ser operado em tempo real, permitindo uma constante atualização da configuração do sistema, e não exigir grande esforço computacional para simular períodos que iniciam com situações extremas de secas ou enchentes. O método desenvolvido demonstrou suas vantagens sobre os tradicionais implicitamente estocásticos, por ser operado em tempo real, permitindo uma constante atualização da configuração do sistema, e não exigir grande esforço computacional para simular períodos que iniciam com situações extremas de secas ou enchentes.The optimization model proposed is intended to minimize operational cost of thermal power stations complementing the hydropower stations of the Integrated System for Electric Power in the Republic of Panama. It consists of the combination of a stochastic model with a decision model. The decision model was formulated by discrete dynamic programming in which the stages are weeks, the state variable is energy stored in Lago Bayano, and the decision variable is the weekly hidropower generation from this lake. The method whi eh was developed présented advantages as compared to the traditional implicity stochastic ones, since it can be operated in real time and thus allows constant updating for the system configuration and does not require much computing to simulate periods which begin in extreme drought or flood situations