[PDF] Top 20 Quím. Nova vol.35 número7

... A Sociedade Brasileira de Química completou 35 anos de existência tendo 22 Secretarias Regionais, 13 Divisões Cien- tíficas e mais de 6.000 sócios, constituindo-se em uma das maiores sociedades científicas ... See full document

... 12 Although aromatic aldimines without an alpha hydrogen are stable in acidic medium, 13 the presence of a methylene group between the ring and the imino group resulted in significan[r] ... See full document

... The oxide calcined at 1000 °C, meanwhile, had a reduction peak symmetrical at very high temperature for the reduction of Ni 2+ in the spinel-like structure which is of greater stabili[r] ... See full document

... While in the surface layer, Pinus afforestation promoted an incre- ase in soil C stock in both hydrophilic (HA + FA) and hydrophobic (HUI + HUH) humic fractions, in subsurface only, t[r] ... See full document

... The hexane/ethyl ether (1:1), ethyl acetate and methanol extracts, and 11 α -hydroxylup-20(29)-en-3-one, tingenone and 6-oxo-tingenol, showed antimicrobial properties on in vitro ass[r] ... See full document

... 27 Ablating the graphite target in pure hydrogen at an optimum pressure of 27 mbar, an XeCl laser (308 nm) coupled with the hot filament, deposited a high-quality diamond coating ont[r] ... See full document

... The SSC treated with iron/manganese hydroxides or via ion- -exchange resins was employed to treat diesel samples containing sulfur compounds.. Free alkalinity was kept as such.[r] ... See full document

... Calculation of real acrylate content of hydrogels of sodium acrylate and acrylamide based on FTIR.. Application of FTIR in the determination of acrylate 1467[r] ... See full document

... A simple, four-step method for better introducing undergraduate students to the fundamentals of molecular orbital (MO) theory of the polyatomic molecules H 2 O, NH 3 , BH 3 and SiH 4 [r] ... See full document

... 2. Mansuy, D.; Battioni, P. In The Porphyrin Handbook; Kadish K. M.; Smith K. M.; Guilard R., eds.; Academic Press: New York, 2000, vol. 4, chap. 26; Groves J. T.; Shalyaev K.; Lee J. In The Porphyrin Handbook; ... See full document

... To produce succinic (Su) and citric (Cit) acid calibration cur- ves, aliquots (35, 25, 20, 15, 10, 5 and 2.5 µL) of the lyophilized stock solutions (corresponding to 50, 35.71, 28.57, 21.42, 14.26, 7.14 µg, ... See full document

... Para medir la absorbancia de cada muestra, se agregan 25 µL de sustrato, 20 µLde glucosa, y se incuba a 35 ºC por un período de 10 min. El valor de ΔA se obtiene por diferencia de la absorbancia leída con respecto ... See full document

... semi-solid and matrix 10% mucuna gum, respectively. The swelling behavior of alginate polymer is the major factor controlling the release of the drug from the bead system and different researchers have reported that ... See full document

... tomentosa leaves and branches and examined the possible analgesic effects of some fractions (hexane, dichloromethane, ethyl acetate and butanol) and of one isolated component, a[r] ... See full document

... uma nova matriz energética menos poluente, a partir de fontes renováveis, em substitui- ção ao petróleo e combustíveis fósseis e que devem ser desenvolvidas novas tecnologias para o aproveitamento da biomassa para ... See full document

... Para que não ique a impressão de que este livro trata apenas da parte histórica até Mendeleev é importante ressaltar que Scerri aborda de forma ampla a contínua evolução da tabela peri[r] ... See full document

... An alternative methodology for analysis of acetaminophen (Ace), phenylephrine (Phe) and carbinoxamine (Car) in tablets by ion-pair reversed phase high performance liquid chromatography [r] ... See full document

... control formulations were prepared as described in the preparation of formulation samples section, then, a known amount of quercetin (10 µg/mL) was added.. Afterwards, samples were 10 [r] ... See full document

... Inspired by the structure and biological activities of resorcinolic lipids and, particularly cytosporone A- a potent inhibitor of plantule germination and growth, we have performed the[r] ... See full document

... The main result has deined an octahedral structure with a cis coniguration of the two isocyanide ligands around iron centre in [Fe(mnt)(L)( t -BuNC) 2 ] complexes. Furthermore, the in[r] ... See full document