Brazil has abundant agro-industrial residues, such as cassava peel, opening the opportunity to produce high-added value chemicals by catalytic fast pyrolysis, in which the desirable products can be tailored. Aiming to provide an application of cassava peel residues, as well as to produce high-value BTEX (benzene, toluene, ethylbenzene and xylenes), beta zeolite-supported nickel (3 and 5 wt.%) catalysts were evaluated in fast pyrolysis. Without any catalyst, large amounts of high-value oxygenated compounds (ketones, carboxylic acid and phenolics) were produced while no BTEX was formed. This was related to the higher amount of cellulose and hemicellulose, as compared to lignin in cassava peel. However, over beta zeolite, these oxygenated compounds go on oligomerization, decarboxylation and decarbonylation producing aromatics (BTEX and polyaromatics), indicating a new reaction route provided by the catalyst. The amount of BTEX and other aromatics increased even more over zeolite-supported nickel, suppressing polyaromatics formation. This is related to the increased strength and amount of acidity of Lewis sites. The most selective catalyst (3% Ni) produces 67% of BTEX and no polyaromatics. Cassava peel and beta zeolite-supported nickel thus proved to be a promising combination to produce BTEX generating a new application of cassava peel residues. agroindustrial agro industrial residues highadded high added pyrolysis tailored highvalue benzene, benzene (benzene toluene xylenes, xylenes , xylenes) zeolitesupported zeolite supported 3 ( wt.% wt ketones, ketones (ketones phenolics formed hemicellulose However oligomerization polyaromatics, polyaromatics) formation sites 3% Ni 67 wt. 6

Abstract This paper presents the influence of different sizes of carbonyl iron particles on the reflectivity measurements of Radar Absorbing Material (RAM). The electromagnetic characterization was performed with a vector network analyzer and a rectangular waveguide in the frequency range of 12.4 to 18GHz (Ku Band). The influence of different parameters such as thicknesses, particle sizes and concentration of carbonyl iron were evaluated. Reflectivity results showed the influence of these parameters on the performance of the RAM. The best reflectivity values (~ −18 dB) were obtained for samples with 60 wt% concentration and 5 mm thickness. We provide information about significantly reflection loss improvement by simply controlling carbonyl iron particulate size.

Currently, a wide range of research involving natural products is focused on the discovery of new drugs in many different therapeutic areas. A great number of the synthetic compounds on the market were derived from natural products, especially plants. Nemorosone is the major constituent of the floral resin of Clusia rosea Jacq., Clusiaceae, and in Cuban propolis. In vitro studies have shown cytotoxic activity in this substance against various tumor cell lines, including those resistant to various cytotoxic drugs, whereas it has low cytotoxicity to non-tumoral cells. Therefore, in order to characterize the biological activity of nemorosone, a substance with potential antitumor activity, and in view of preclinical testing of the toxicity of drug candidate compounds, the main aim of this study was to determine the mutagenic and antimutagenic activity of nemorosone by the Ames test, using the strains TA97a, TA98, TA100 and TA102 of Salmonella typhimurium. Secondly, to characterize the estrogenic activity in an experimental recombinant yeast model (Recombinant Yeast Assay) mutagenic activity was observed at in any of the concentrations in any of the test strains. To evaluate the antimutagenic potential, direct and indirect mutagenic agents were used: 4 nitro-o-phenylenediamine (NPD), mitomycin C (MMC) and aflatoxin B1 (AFL). Nemorosone showed moderate antimutagenic activity (inhibition level 31%), in strain TA100 in the presence of AFL, and strong antimutagenic activity in TA102 against MMC (inhibition level 53%). Estrogenic activity was observed, with an EEq of 0.41±0.16 nM at various tested concentrations.