[PDF] Top 20 Quím. Nova vol.34 número8

... uma nova identidade da Química, cada vez mais sócio e ambientalmente sustentável, imprimindo as suas características neste campo que se encontra em constante trans- ... See full document

... In this study, an accurate QSRR model for estimating the retention indices (RI) of essential oils from ive Pimpinella species gathered from central Turkey which obtained by GC and GC[r] ... See full document

... Thus, highly eficient separation, reduced analysis time and reduced mobile phase consumption (compared to chromatographic conditions reported by Hernández et al. 10 ) made the procedu[r] ... See full document

... Precision and accuracy of ICP-OES analysis are shown in Tables 4 and 5. Precision was close to or below 10% for all the analytes in both the CRM PACS-1 (Table 4) and sediment S11 (Table 5), except for Cr (34%) in ... See full document

... Figure 4. Effect of KMnO 4 concentration on the CL intensity. Effect of glyoxal concentration on the CL intensity.. Comparing to the previous methods for determination of cinnamic [r] ... See full document

... The XRD spectrum of RHS (Figure 2S, supplementary material) showed a broad peak at the 2 θ value of 22 degrees, a characteristic of silica in amorphous form which is suitable for the[r] ... See full document

... An aliquot of the hexane phase (6 g) was subjected to silica gel column chromatography and eluted with hexane, ethyl acetate and then methanol, gradually increasing the polarity, yielding 239 fractions which were ... See full document

... The enantioselective biotransformation of propranolol (Prop) by the endophytic fungi Phomopsis sp., Glomerella cingulata , Penicillium crustosum , Chaetomium globosum and[r] ... See full document

... 1% solution of ferric chloride, 4% solution of sodium nitrite, 10% solution of hydrochloric acid and 0.2% solution of ammonium sulfamate were prepared freshly.. Procedure.[r] ... See full document

... The diffraction patterns of support and catalysts are illustrated in Figure 1. XRD of support indicates the presence of the luorite struc- ture of CeO 2 (2θ= 28.5, 33.1, 47.5 and 56.3°, JCPDS-34-394). Weak peaks ... See full document

... A simple liquid chromatographic method was optimized for the quantitative determination of terbinaine in pharmaceutical hydroalcoholic solutions and tablets, and was also [r] ... See full document

... É necessário, também, ampliar os projetos de instituições, grupos e redes temáticas de pesquisa, assim como os programas de formação de recursos humanos, com estratégias para ixação d[r] ... See full document

... Effect of UV light on different microorganisms in various efluents using a solar simulator and Black light lamps (BLL): (a) UASB efluent; (b) facultative pond efluent; (c) duckweed pon[r] ... See full document

... The following material is available for free at PDF format at http://quimicanova.sbq.org.br: Figure 1S showing the demulsiier base performance on demulsiication of crude oil [r] ... See full document

... Las iguras que se presentan son: Dependencia de la CMC con la longitud de la cadena alquílica (Figura 1S); Dependencia de la CMC con el volumen molecular del anión para diversos cation[r] ... See full document

... Although sesquiterpenes have been found in several species of the Lauraceae, mainly as components of leaf essential oils, only three representatives of this class of compounds have bee[r] ... See full document

... Effect of ions in relative enzymatic activity of the catechol 1,2-dioxy- genase (C1,2O) and catechol 2,3-dioxygenase (C2,3O) in the cell free extract (a); and in the cell free extract ([r] ... See full document

... Por lo tanto, en el presente trabajo se validó un método por Cromatografía líquida de alta eiciencia (CLAE) para la cuantiica- ción de este fármaco en estos medios biorrelevantes y en s[r] ... See full document

... Química Nova publica artigos com resultados originais de pesquisa, trabalhos de revisão, divulgação de novos métodos ou técnicas, educação e assuntos gerais, em português, inglês e ...Química Nova está a ... See full document

... The values obtained for the reuse of CaBZ and SrBZ, under the conditions used in experiments 26 and 47, respectively, revealed the same behavior noted earlier for BaBZ, that is, a slig[r] ... See full document