Globalization – Pros and cons
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BURLACU, Sorin; MATEI, Florin Octavian; GUŢU, Corneliu. Globalization – Pros and cons. In: Quality - Access to Success. 2018, nr. S1(19), pp. 122-125. ISSN 1582-2559.
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Quality - Access to Success
Numărul S1(19) / 2018 / ISSN 1582-2559

Globalization – Pros and cons


Pag. 122-125

Burlacu Sorin1, Matei Florin Octavian1, Guţu Corneliu2
 
1 The Bucharest University of Economic Studies,
2 Academy of Economic Studies of Moldova
 
Disponibil în IBN: 9 mai 2018


Rezumat

Globalization is a very common concept used to characterize the current state of the world economy, but differently understood by those who characterize it as a phenomenon. Some perceive it as a complete uniformity, others, on the contrary, as a diversification of proportions, based on the observance of common principles. The aim of this paper is to present current understanding of globalization as well as environmental changes in the context of globalization and its influence on demographic evolution, population and the global environment. For impartiality in presenting the pros and cons of globalization have been considered both meanings of the concept, as found in literature but also in international operations, as well as positive and negative effects of the phenomenon.

Cuvinte-cheie
Demographic evolution,

Environmental change, globalization

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@article{ibn_70720,
author = {Gelmboldt, V.O. and Anisimov, V.Y. and Prodan, O. and Şișkin, I.},
title = {<p>Hexafluorosilicates with antibacterial cations</p>},
collection = {The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova},
year = {2014},
volume = {},
pages = {20-20},
abstract = {(EN) <p>The &quot;onium&quot; hexafluorosilicates, in particular, ammonium hexafluorosilicate (NH4)2SiF6 and hexafluorosilicates of amino acids represent in the recent years the objects of intensive research as compounds possessing by the caries-protected and hyposensitive properties [1-3]. In present communication we describe some results of synthesis and physico-chemical investigations of three new salts with antibacterial cations &ndash; (CH)SiF6, (PHMG)(SiF6)1.5 and (CP)2SiF6 (CH &ndash; chlorhexidine, PHMG &ndash; polyhexamethylene guanidinium, CP &ndash; cetylpyridinium). The compounds with the composition (CH)SiF6 (<strong>I</strong>), (PHMG)(SiF6)1.5 (<strong>II</strong>) and (CP)2SiF6 (<strong>III</strong>) where obtained by the interaction of corresponding &ldquo;onium&rdquo; chlorides in methanol solution with fluorocomplex acid H2SiF6 (45 %) in mole ratios 1 : 3 [4]: 2(L)Cl (MeOH) + H2SiF6 (aq) &rarr; (L)2SiF6 + 2HCl. Reaction products <strong>I </strong>&ndash; <strong>III </strong>where isolated in an approximately qualitative yield. All compounds were characterized by elemental analysis, IR, NMR 19F and mass-spectrometry. Mass spectra (EI) of <strong>I </strong>&ndash; <strong>III </strong>are contained the peak of ion [SiF3]+ (m/z = 85) &ndash; characteristic product of fragmentation of SiF4. According to IR spectroscopy data, &ldquo;onium&rdquo; hexafluorosilicates <strong>I </strong>&ndash; <strong>III </strong>have ionic structures. The vibrations of the groups &nu;(NH), &nu;(N+H2) in the salts <strong>I </strong>and <strong>II </strong>appear as a strong absorption bands at 3360 &ndash; 3180 cm&ndash;1; &delta;(N+H2) vibrations appear at 1634 and 1637 cm&ndash;1. In compound <strong>III</strong>, three &nu;ring vibrations at 1638, 1577 and 1488 cm&ndash;1 are observed. The strong &nu;(SiF) and &delta;(SiF2) stretches of SiF6 2&ndash; anions are observed in their characteristic regions (at 744 &ndash; 734 and 482 cm&ndash;1 respectively). The NMR 19F spectra of compounds <strong>I</strong>, <strong>II </strong>(d-DMSO) and <strong>III </strong>(CDCl3) have one resonance at &ndash;136.70, &ndash;135.09, &ndash;133.8 ppm. The range of chemical shifts observed could be due to changes in sample concentration, different solvents, the presents or absents of water, and the differing cationic species. The results of thermogravimetric analysis are consistent with a multi-stage thermolysis scenario for hexafluorosilicates <strong>I </strong>and <strong>II</strong>. The temperatures of thermolysis beginning of the complexes <strong>I </strong>and <strong>II </strong>are 270 and 100 &deg;C, respectively. The studied compounds <strong>I </strong>&ndash; <strong>III </strong>are characterized by the predicted high tendency to hydrolysis in dilute aqueous solutions with the formation of silica and fluoride anion that allows considering these salts as potential cariesprotected agents. The study of biological activity of these compounds is the subject of further investigations.</p>},
url = {https://ibn.idsi.md/vizualizare_articol/70720},
}