ABSTRACT Ventricular fibrillation (VF) is a deadly rhythm problem. With asystole, it represents one of the most extreme emergencies that may engage vital prognosis within only few minutes if appropriated treatment is not instituted. It is learned in all medical schools worldwide that VF is not compatible with consciousness and sustained life. Moreover, at 37°C, and without restauration of cardiac flow, VF may be responsible for severe and most often irreversible brain damage after 3 minutes.

The pyrolysis of waste tire has been proposed as an alternative route to its recycling producing residual oils that can be used as fuels. In this work, a physicochemical process to obtain carbon-based dots (CBD) from carbon black (CBL) derivatives of tires is described. For this, the CBL was treated with different acids to produce CBL1 and CBL2 particles suspension. The pH of the suspension was adjusted to 5.6 to precipitate remaining impurities. Afterwards, the supernatant was ultra-centrifuged and the yellow pale solid, the purified CBD obtained by roto evaporation, was characterized by ultraviolet-visible spectrophotometer (UV-Vis), photoluminescence (PL) at 320-380 nm, high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared microscopy (mFTIR), and X-ray photoelectron spectroscopy (XPS). This material showed the typical excitation wavelength dependent emission and a PL quantum yield of 19.29% and was constituted by a well-defined spherical shaped and single sheets of “graphene quantum dots” with undefined shape, with potential applications in optoelectronic and fluorescence imaging devices.

As inundações representam aproximadamente 40% do total de desastres naturais ocorridos em todo o mundo, são consideradas, portanto, um importante problema de saúde pública. Embora as inundações constituam um problema global, dados da Estratégia Internacional de Redução de Desastres revelam que quase a totalidade dos óbitos ou afetados concentram-se em países em desenvolvimento. Presume-se que, embora tenham causas naturais, as consequências das inundações envolvem também questões sociais. Para tentar predizer o grau de vulnerabilidade de uma localidade na ocorrência de desastres naturais, foi desenvolvido neste trabalho um índice socioambiental. Para tanto, usou-se análise multivariada, envolvendo análise fatorial e variáveis demográficas, sociais e ambientais. O índice foi aplicado nos municípios do estado do Rio de Janeiro e comparado aos números oficiais da Defesa Civil. Os resultados encontrados sugerem que o índice proposto atende a expectativa de predizer a vulnerabilidade da população local.

Floods account for approximately 40% of natural disasters that occur around the world and they are therefore considered a major public health problem. While floods constitute a global problem, data from the International Strategy for Disaster Reduction showed that almost all of the deaths or individuals affected are concentrated in developing countries. It is assumed that, although they have natural causes, the consequences of floods also involve social issues. To try to predict such vulnerability in the occurrence of natural disasters, a social and environmental index that shows the degree of vulnerability of a location was developed in this paper. This index was developed using multivariate analysis involving factor analysis and demographic, social and environmental variables. The index was applied in the municipalities of the state of Rio de Janeiro and compared with the official figures of the Civil Defense Unit. The results found suggest that the proposed index meets the expectation of predicting the vulnerability of the local population.

As inundações representam aproximadamente 40% do total de desastres naturais ocorridos em todo o mundo, são consideradas, portanto, um importante problema de saúde pública. Embora as inundações constituam um problema global, dados da Estratégia Internacional de Redução de Desastres revelam que quase a totalidade dos óbitos ou afetados concentram-se em países em desenvolvimento. Presume-se que, embora tenham causas naturais, as consequências das inundações envolvem também questões sociais. Para tentar predizer o grau de vulnerabilidade de uma localidade na ocorrência de desastres naturais, foi desenvolvido neste trabalho um índice socioambiental. Para tanto, usou-se análise multivariada, envolvendo análise fatorial e variáveis demográficas, sociais e ambientais. O índice foi aplicado nos municípios do estado do Rio de Janeiro e comparado aos números oficiais da Defesa Civil. Os resultados encontrados sugerem que o índice proposto atende a expectativa de predizer a vulnerabilidade da população local.

Floods account for approximately 40% of natural disasters that occur around the world and they are therefore considered a major public health problem. While floods constitute a global problem, data from the International Strategy for Disaster Reduction showed that almost all of the deaths or individuals affected are concentrated in developing countries. It is assumed that, although they have natural causes, the consequences of floods also involve social issues. To try to predict such vulnerability in the occurrence of natural disasters, a social and environmental index that shows the degree of vulnerability of a location was developed in this paper. This index was developed using multivariate analysis involving factor analysis and demographic, social and environmental variables. The index was applied in the municipalities of the state of Rio de Janeiro and compared with the official figures of the Civil Defense Unit. The results found suggest that the proposed index meets the expectation of predicting the vulnerability of the local population.

O tiametoxam é um inseticida sistêmico do grupo neonicotinoide, da família nitroguanidina que atua no receptor nicotínico acetilcolina da membrana de insetos, lesando o sistema nervoso e levando-os à morte. Tem sido utilizado com sucesso no controle de pragas iniciais de diversas culturas. Considerou-se que o produto possui um efeito bioativador, uma vez que, mesmo na ausência dos insetos-praga, tem promovido aumento em vigor, desenvolvimento e produtividade de cultivos. No presente trabalho, foi analisada a anatomia de raízes jovens de cana-de-açúcar RB 83 5486 após aplicações de tiametoxam nas concentrações de 0, 400 e 800g ha-1. As análises foram conduzidas aos 7, 14, 21 e 28 dias após as aplicações (DAA), no sentido de esclarecer seus efeitos na anatomia radicular da planta. Verificou-se que, até os 21DAA de desenvolvimento da cana-de-açúcar, thiametoxam amplia a espessura do córtex da raiz e aumenta o diâmetro do cilindro vascular, bem como o número de elementos de vaso do metaxilema, melhorando a absorção de água e sais minerais.

Thiamethoxam is a systemic insecticide from the neonicotinoid group, nitroguanidin family which affects the nicotinic receptor acetyl choline in the insect membrane, wounding the nervous system and causing the death of the insect. It was used with success in the control of initial pests of several crops. It was considered that thiamethoxam has a bioactivator effect, because in the absence of insects promoted increase in vigor, development and productivity of crops. This work was carried out to verify if thiamethoxam causes histological changes in sugarcane roots. In this work, it was used optical microscopy, images arrest, tissue biometrics and statistical analysis, in young roots of sugarcane RB 83 5486 after the treatments with different thiamethoxam concentrations. It was determined changes in histological structure of tissues 7, 14, 21 and 28 days after the treatments, establishing its effects on root plant anatomy. It was verified that thiamethoxam increased root cortex width, increasing the vascular cylinder and the metaxylem vessel elements number in the vascular tissue until 21 days after application.