[PDF] Top 20 Quím. Nova vol.38 número4

... properties such as smaller particle size, uniform dispersion and higher surface area which were attained due to the utilization of the better zirconia precursor.. Furthermore, for both[r] ... See full document

... Approximately 20 g of raw oat hulls were dispersed in 250 mL of a peracetic acid solution (50% acetic acid (Synth – Brazil), 38% hydrogen peroxide (Synth – Brazil) and 12% distilled water) at 60 ºC and vigorously ... See full document

... Schematic HLLME-FA procedure (Figure 1-1) a mixture of 1.0 mL acetonitrile containing 200.0 µL toluene was added to the home-designed microextraction cell, (Figure 1-2) 22.0 mL of the [r] ... See full document

... The decrease in catalytic activity above this loading is attributed to the formation of large metal aggregates, resulting in pore blocking and lower catalyst surface area. ACKNOWLEDGEM[r] ... See full document

... structure of polychlorinated dibenzo-p-dioxins is different from the basic structure of polychlorinated dibenzofurans. Thus, it is shown that MDEV index can be used as the structural d[r] ... See full document

... of TPA on NH 4 ZSM5 zeolite allowed the obtention of catalysts with high photocatalytic activity in the degradation of methyl orange dye (MO) in water, at 25 °C.. These can be reused at[r] ... See full document

... Bioorganic and biological chemistry have been found to be highly motivating to undergraduate students and in this context, biochemical blood parameter analysis emerges as highly attract[r] ... See full document

... In addition, final average grades and percentages of academic success indicate that students enrolled in the intervened courses significantly over-performed compared to non-intervened [r] ... See full document

... The National Institute for Public Health and the Environment published the Nanomaterial Report of products for human consumption in the European market in 2010.. 21 In the past three[r] ... See full document

... The simplicity, low reaction time and high yields of products under a green condition are resulted from the eficiency of sulfonic acid func- tionalized silica (SBA-Pr-SO 3 H) as a heter[r] ... See full document

... pickelii were found to have antimicrobial and antioxidant activities (Table 5), they were subjected to successive chromatographic separations as de- scribed in the Experimental leading [r] ... See full document

... All these salts inhibited the growth of Botrytis cinerea, with compounds 2c and 2d showing greater antifungal activity than zinc dimethyldithiocarbamate, the active principle of the[r] ... See full document

... These two non-linear systems are described correctly by the Practical Stochastic Method, which is simple, robust, auto-sufficient, and independent of a deterministic procedure. This st[r] ... See full document

... The powder XRD was carried out using X-ray diffractometer (Rigaku D/Max-II, Japan) using Cuα radiation. Scherrer equation was used to calculate the crystallite sizes of the samples. The mor- phology and elemental ... See full document

... input data, training process is complex and very large amounts of calibration sample is needed. So, for the spectrum and kinetic data, a method for reduction of input data is necessary. Principal component analysis ... See full document

... The NFP nanocapsules PF68 NFP and PVA NFP showed different values of mean particle size, zeta potential and entrapment efficiency. The evaluated parameters remained constant during a p[r] ... See full document

... Considering that the cation in solid residue obtained from spectro- metric techniques wastes do not have all cations studied in qualitative analytical chemistry, its application is rest[r] ... See full document

... Typically, biodegradable polymers can degrade and erode as: i) bulk process, where no significant alterations occurs in the physical size of the polymer carrier until it is always fully degraded or eroded, but the ... See full document

... The present study examines the condensable compounds present in the liquor produced from black wattle wood at different thermal degradation conditions, using gas chromatography coupled [r] ... See full document

... between 2-tolylboronic acid and 2-bromomesitylene using palla- dacycle 1 at constant temperature of 130 °C but with KF and CsF bases, which changed the solvent from dioxane to DMF with an 80% confidence. Thus, when the ... See full document