[PDF] Top 20 Quím. Nova vol.26 número6

... A elaboração de uma página na Internet, centralizando as atividades das Secretarias, pode trazer recursos para elas, através da venda de espaço publicitário para empresas existen- tes na[r] ... See full document

... Parti- cularmente, el test del n-decano nos ofrece informaciones valiosas respecto a características de la geometría porosa, tales como: núme- ro de tetraedros que limitan las ventanas d[r] ... See full document

... With regard to this analytical method, attention must be payed to the following considerations: (a) the buffering capacity of the lignocellulosic material must be taken into account beca[r] ... See full document

... The low ozone concentration available using electric discharge in the gaseous phase (corona process) or UV-light absorption (photochemical process) technologies restricts ozone applicati[r] ... See full document

... quantity to be used in equation (21) to obtain the total Ω λ parameters. Several interesting aspects may be discussed about the forced electric dipole and dynamic coupling mechanisms. An analysis from typical values of ... See full document

... negative bacteria has been reported. EDTA causes disruption of the outer membrane, since it is capable of removing its calcic and magnesic divalent cations, with the consequent loss of substantial amounts of ... See full document

... (C 26 ), 18.4 (C 6 ), 21.4 (C 30 ), 23.3 (C 11 ), 23.6 (C 27 ), 24.2 (C 16 ), 27.4 (C 2 ), 27.9 (C 15 ), 28.4 (C 23 ), 30.7 (C 21 ), 32.9 (C 7 ), 36.7 (C 22 ), 37.0 (C 10 ), 38.8 (C 1 , C 4 , C 20 ), 39.1 (C 17 ), ... See full document

... Para obtener una mayor información sobre el proceso y asignar las pérdidas de peso, en las distintas temperaturas, a materia orgánica situada en los canales inter- o intralaminares del p[r] ... See full document

... (UFRJ 26, UNICAMP 25, UNESP 16, USP-SP 12, UFSC 11, FFCL-USP-RP 11, UFSCar 8, UFPR 7, UFMG 7, UFF 4, PUC-RJ 4, UERJ 2, UFC 2, UFSM 2, UFRS 2, UNIGRANRIO 2, FAEQUIL 2 e UnB, UFMS, UFV, UFBA, UFPE, UEM, MACKENZIE, ... See full document

... In their publication, 17 planar tetramethylenethane 4 was shown to be disjoint and, based on molecular orbital calculations, predicted to be a ground-state singlet. In 1970, 19 Dowd had produced a triplet state of 3 via ... See full document

... 7. Bach, R. D.; Klix, R. C.; Tetrahedron Lett. 1985, 26, 985. 8. All compounds described in this text were fully characterized by 1 H and 13 C NMR, IR and mass spectra. 9. Constantino, M. G.; Matias, L. G. O.; da ... See full document

... Na nova escala, nota 7 representa o nível de excelência e nota 3 o nível mínimo de desempenho aceitável; ressalte-se, entretanto, que para os cursos de mestrado a nota máxima possível é ... See full document

... The parameterization of the TIP4P model was optimized to reproduce the experimental properties of water using a cutoff procedure to calculate the contribution of the Coulombic term. Figu[r] ... See full document

... With the physical mixture, a small increase in dissolution rate was obtained which can be explained due to the formation of a minimum quantity of the complex.. After 3 minutes, the quant[r] ... See full document

... no Vol. 22, p. 412 da Química Nova, gostaria de reafirmar a vantagem do sistema no domínio da freqüência sobre os siste- mas de contagem de fótons quando se utiliza uma lâmpada de ... See full document

... These compounds have something in common: an amino acid, phenylalanine (SR 120819A) and arginine (BIBP 3226) respectively, in the center part of the molecule. Also, the amino and carboxy[r] ... See full document

... Las coordenadas posicionales y térmicas de los átomos hidrógeno, los factores térmicos anisotrópicos de los átomos no hidrógenos y los factores de estructura de cada reflexión medida pue[r] ... See full document

... The pH and conductometric measurements were carried out as usual 22. Using different concentrations of chromium chloride and the alkali niobates at specific pH levels 12.0, 10.8 and 7.6,[r] ... See full document

... Given the Zimmerman and Frost circle mnemonics, along with the spectrum of the appropriate acyclic polyene, all secu- lar equation roots are immediately known for any isoconjugate pair o[r] ... See full document

... Química Nova (QN) parece ter ajudado a vencer uma barreira na comunicação, conduzindo ao estabelecimento de um veículo mais internacionalizado, com relação ao idioma, que é o Journal of the Brazilian Chemical ... See full document