[PDF] Top 20 Biblioteca Digital do IPG: Complexation Study of Alkali Metal Ions by Crown Ether Derivatives in Nonaqueous Solvents by Potentiometric Methods

... thermodynamic of complexation and selectivity profiles of crown ethers attached to an anthraquinone unit in the neutral and reduced states towards alkali and alkaline earth ...a ... See full document

... proposed in Refs. [8,11,20] to model the dynamics of a network of educational institutions connected by the transfer of students between ...success in a school with different ... See full document

... vulnerabilities in web applications, they do not have to know much about programming languages to build a common ...needed in more than half the times (Fig. 5). In particular, GET variables are ... See full document

... role of the quality of governance in the creation of new companies, we used a large sample, encompassing more than 200 countries around the world, using as a reference the database created ... See full document

... exploit. In the files downloaded, we found cases in which several exploits were depicted ...others by having the text “Multiple Vulnerabilities” somewhere in their ...each of these ... See full document

... selectivity of the method was evaluated by analysing six blank plasma samples from different subjects to evaluate the existence of matrix endogenous substances at retention times that could interfere ... See full document

... University of Granada. With the objective of analyzing university students' self-perception about their role as university leaders, a mixed methodological design was developed in which a ... See full document

... Furthermore in Portugal, 58.3% of early-stage entrepreneurs create a business motivated by opportunity, ...motivated by the necessity and 15.6% claim that the mixture of motives is the ... See full document

... com os colegas na realização dos trabalhos/ objectivos a atingir. Avaliação 1 Não me preocupa em colaborar com os colegas de equipa, nem com os objectivos a atingir. 2 Colaboro com os [r] ... See full document

... O backOffice é o espaço reservado onde os utilizadores podem consultar o seu histórico, mas é também um espaço reservado para administradores, onde podem fazer toda a gestão[r] ... See full document

... spent by an integration phase, and therefore, observation to understand the mode of operation or the school or the ...type of used language, the posture and dynamic of the ...role, in ... See full document

... generated in a “Triple Helix” model of multiple and reciprocating relationships between the academic, public and private sectors (Etzkowitz, ...also in the involvement of the government (with ... See full document

... However the impact of this education par exceilence is directiy and cyciicaliy reflected in their students having a strong weight in the economy and society but also in the institutions [r] ... See full document

... detection in the IR ...temperature of objects based on the emitted ...tool in various fields. However, accurate measurement of temperature is strongly dependent on the emissivity value ... See full document

... obtained by solving the respective polynomials p(x)ij with respect to the leading term in xij, that is; the term in xij with the highest ...power of the leading term is m, which is the degree ... See full document

... Extraction of nucleic acids with silica was performed as described by Boom et ...recovered in 45 μL and stored at -80°C until PCR analysis. AdV DNA was detected in sewage sludge samples ... See full document

... thermogravimetric methods have been used extensively for the determination of kinetic parameters in ...matrix in advanced high performance composites due its high thermal stability, excellent ... See full document

... este metal estar presente em concentrações apreciáveis, quer nos flui- dos biológicos quer em preparações multivitamínicas, usual- mente administradas durante tratamentos com ... See full document

... layer of Oxisols collected from several Brazilian regions, which were sieved through a 2 mm ...location of origin of each of these soils were published elsewhere (Silva et ...present ... See full document

... occurrence of heavy metals (Al, Cd, Pb, Zn, Cr, Co, Cu, Fe, Mn and Ni) in water and sediment samples was investigated in a sub-basin in the southeast of Brazil (São Carlos, ...adapted ... See full document