Indicativos de resiliência familiar em famílias de crianças com síndrome de Down

Resumo Este estudo objetiva caracterizar e analisar a resiliência familiar em famílias de crianças com síndrome de Down. Participaram cinco famílias compostas por pai, mãe e filhos, tendo um deles a síndrome. Os instrumentos utilizados foram o Questionário de Caracterização do Sistema Familiar, o qual foi respondido pela mãe; o Inventário de Estratégias de Coping, o qual ambos os genitores responderam separadamente; e entrevistas com genitores e filhos com desenvolvimento típico. As famílias foram visitadas em três momentos. Os resultados indicam que diante de eventos ruins, principalmente, dos problemas de saúde relacionados à síndrome de Down, as famílias apresentam capacidade de extrair sentido da adversidade, bem como de se organizar de forma cooperativa, com diálogo e estreitamento dos vínculos. Em todas as famílias foram identificados indicativos de resiliência familiar. A estratégia de coping mais utilizada é a reavaliação positiva, enquanto a menos utilizada é fuga-esquiva

An evaluation of the effect of incorporating metal salts into 1,8 diazafluoren-9-one (DFO) formulations for fingermark enhancement

© 2019 A study into the modification of 1,8-diazafluoren-9-one (DFO) formulations by the additions of metal salts into the working solution is reported. Similar additions have been found to increase the fluorescence of marks developed using other amino acid reagents including 1,2-indandione and the ninhydrin analogue 5-methylthioninhydrin. It was found that adding zinc chloride to give a 1:1 ratio of zinc ions:DFO molecules gave optimum fluorescence, and improvements in performance over the standard DFO formulation were achieved. Attempts to produce equivalent formulations with iron, nickel and palladium chlorides were unsuccessful. In a comparative trial with a 1,2-indandione-zinc formulation on brown paper and cardboard substrates, 1,2-indandione-zinc gave superior results and it was decided to focus further research on this reagent instead of DFO-zinc

Observation of Fe - H/D modes by nuclear resonant vibrational spectroscopy

Metal-hydrogen bonding is important in chemistry and catalysis, but H atoms are often difficult to observe, especially in metalloproteins. In this work we show that Fe-H interactions can be probed by nuclear resonance vibrational spectroscopy at the 14.4 keV 57Fe nuclear resonance. An important advantage of this method, compared to Raman and IR spectroscopy, is the selectivity for modes that involve 57Fe motion. We present data on the FeS4 site in rubredoxin and the [FeH(D)6]2- ion. Prospects for studying more complex systems are discussed. Copyright © 2003 American Chemical Society

Balancing Risk and Reward: A Rat Model of Risky Decision Making

We developed a behavioral task in rats to assess the influence of risk of punishment on decision-making. Male Long-Evans rats were given choices between pressing a lever to obtain a small, “safe ” food reward and a large food reward associated with risk of punishment (footshock). Each test session consisted of 5 blocks of 10 choice trials, with punishment risk increasing with each consecutive block (0, 25, 50, 75, 100%). Preference for the large, “risky ” reward declined with both increased probability and increased magnitude of punishment, and reward choice was not affected by the level of satiation or the order of risk presentation. Performance in this risky decision-making task was correlated with the degree to which the rats discounted the value of probabilistic rewards, but not delayed rewards. Finally, the acute effects of different doses of amphetamine and cocaine on risky decision-making were assessed. Systemic amphetamine administration caused a dose-dependent decrease in choice of the large risky reward (i.e. – it made rats more risk-averse). Cocaine did not cause a shift in reward choice, but instead impaired rats’ sensitivity to changes in punishment risk. These results should prove useful for investigating neuropsychiatric disorders in which risk taking is a prominent feature, such as attention deficit