Dislocations: between art and life

A palestra interroga a atualidade e a pertinência da proposta de aproximação entre arte e vida. Esse projeto orienta a perspectiva da análise que, passando pelas manifestações vanguardistas históricas e pela tentativa de definição do contemporâneo, firma-se em especial ao redor da obra e da postura artística de Hélio Oiticica.The lecture interrogates the present relevance and pertinence of proposing the approximation between art and life. This project guides the perspective of analysis that, passing by historic avant-garde manifestations and the attempt of defining the contemporary, firms itself especially around the work and artistic posture of Helio Oiticica

Transthoracic echocardiographic imaging of coronary arteries: tips, traps, and pitfalls

The aim of this paper is to highlight coronary investigation by transthoracic Doppler evaluation. This application has recently been introduced into clinical practice and has received enthusiastic feedback in terms of coronary flow reserve evaluation on left anterior coronary artery disease diagnosis. Such diagnosis represents the most important clinical application but has in itself some limitations regarding anatomical and technological knowledge. The purpose of this paper is to offer a didactic approach on how to investigate the different segments of left anterior and posterior descending coronary arteries by transthoracic ultrasound using different anatomical key structures .as marker

Efficient second harmonic generation from thin films of V-shaped benzo[b]thiophene based molecules

We have designed an original approach for efficient Second Harmonic Generation of tailored V-shape benzo[b]thiophene molecular systems enabling versatile and flexible one-step, dry and technologically friendly thin film processing. The designed moieties show χ(2) values at least as high as the reference LiNbO3 single crystal, without poling processing and matching the constrains of integrated optical configuration for nonlinear optical devices. This may open the way to a new class of organic materials exploitable for photonic applications

Concentração e perda de nutrientes em microbacias hidrográficas agrícolas do planalto médio gaúcho.

A agricultura é considerada uma das principais atividades que influenciam na degradação dos recursos hídricos, principalmente quando se trata de agricultura intensiva, com uso indiscriminado de fertilizantes, ausência de mata ciliar e inadequado uso e manejo do solo e das culturas, como a não adoção de práticas conservacionistas (MINELLA et al., 2014; RIBEIRO et al., 2014;BORTOLOZO et al., 2015), os quais potencializam a perda denutrientes por escoamento superficial, tanto na forma solúvel,quanto na forma particulada (MINELLA et al., 2014

Perda de água e sedimentos em microbacias hidrográficas agrícolas cultivadas sob plantio direto.

O Sistema Plantio Direto (SPD) é uma prática conservacionista de manejo do solo que contribui para a mitigação da perda de água e de sedimentos (GASSMAN et al., 2006; DENARDIN et al., 2012;SHI et al., 2012). Contudo, é sabido que o manejo adotado em SPD amplamente utilizado pelos agricultores no Sul do Brasil, não está considerando na totalidade as práticas preconizadas pela agricultura conservacionista, como por exemplo, o controle do escoamento superficial (MERTEN et al., 2015), o qual compromete a qualidade dos recursos naturais (solo e água)

Rubbing induced reversible fluorescence switching in thiophene-based organic semiconductor films by mechanical amorphisation

Here, we applied rubbing on thiophene-basedorganic semiconductor thin films to induce a reversible mechanical amorphisation. Amorphisation is associated with fluorescence switching, which is regulated by the polymorphic nature of the film. Thermal annealing of rubbed films produces an opposite effect with respect to rubbing, inducing film crystallization. Notably, thermal crystallisation starts at a low temperature but generates the polymorph stable at a high temperature in the bulk. The mechanism of mechanical transformation is explained considering the mechanical properties of the material and demonstrated through combined X-ray diffraction, atomic force microscopy and photoluminescence at confocal microscopy. This journal i

Bicolor Pixels from a Single Active Molecular Material by Surface-Tension-Driven Deposition†

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Perda de água e sedimentos em microbacias hidrográficas agrícolas na região subtropical do Brasil.

Objetivou-se com o presente estudo avaliar a influência de práticas de conservação de solo e de água nas perdas hídricas e de sedimentos via escoamento superficial e indicar a qualidade do uso e manejo do solo de microbacias hidrográficas na região subtropical brasileira

Graphene-Paper-Based Electrodes on Plastic and Textile Supports as New Platforms for Amperometric Biosensing

The possibility of exfoliating graphite into graphene sheets allows the researchers to produce a material, termed “graphene paper” (G-paper), conductive as graphite but more flexible and processable. G-paper is already used for electronic applications, like conductors, antennas, and heaters, outperforming metal conductors thanks to its high flexibility, lightness, chemical stability, and compatibility with polymeric substrates. Here, the effectiveness in the use of G-paper for the realization of electrodes on flexible plastic substrates and textiles, and their applicability as amperometric sensors are demonstrated. The performance of these devices is compared with commercial platforms made of carbon-based inks, finding that they outperform commercial devices in sensing nicotinamide adenine dinucleotide (NADH), a key molecule for enzymatic biosensing; the electrodes can achieve state-of-the-art sensitivity (107.2 μA mm−1 cm−2) and limit of detection (0.6 × 10−6 m) with no need of additional functionalization. Thanks to this property, the stable deposition of a suitable enzyme, namely lactate dehydrogenase, on the electrode surface is used as a proof of concept of the applicability of this new platform for the realization of a biosensor. The possibility of having a single material suitable for antennas, electronics, and now sensing opens new opportunities for smart fabrics in wearable electronic applications