Estimation of economic growth potential in Romania in medium and long term

Economic growth, as an economic process on long term, is influenced by economic, social and politic factors. The objective of this paper is to create a new perspective over the economic growth in Romania from the last twenty years. For this, the determinants of economic growth are analyzed, by emphasizing the existing correlations between the macroeconomic variables which determined the Romanian economic growth in the last twenty years. To substantiate the conclusions, there were used data from Eurostat databases, about the evolution of European Union in its whole, and for Romanian economy, especially, for the period 1995-2014. The evolution of some macroeconomic indicators is studied, as: the value added, income of different categories of workers, production costs of different types of activities. The study emphasizes the changing of economic activity structure in Romania, which favored the economic growth. Also with the structure changing, is shown the impact of technical progress over the economic growth rate. The study can be considered as an applicative scientific paper in the field of research of causes and conditions which determine the economic growth.peer-reviewe

Structural aspects of the European Union economy

The paper analyzes the input-output structure of European economy in 2010, based on six main economic sectors, for better characterizing the backward and forward linkages of inter-industrial economic flows. The changes of final demand and of sectoral production can be analyzed in the propagation processes, allowing to know the behavior at macroeconomic level of European economy. The common economic policies at European level can be undertaken to keep the equilibrium between different sectors, to stimulate the sectors with high levels of productivity, to ensure the efficiency of using the resources, and the sustainability of economic development, which are the purposes of a smart development.peer-reviewe

ACCOUNTING FACTS IN THE FIELD OF ROMANIAN FORESTRY

Within the article we tackle aspects concerning the forestry activity undertaken bycertain entities in Romania. We present some practical applications concerning the sale offirewood, standing timber and logs, because every sale category has certain accountingcharacteristics.accounting, forestry, incomes, firewood, standing timber, log

The global economic crisis and repositioning the influencing centres

The global economic crisis is influencing many areas: scientific research, social, politics. The crisis is generating new economic models, new social models – individually and collectively and also a new influencing centres map. The opportunity of crisis means both cause identification as well as lesson learning. The crisis can be analysed concerning the management of the specific situation and the changes that globally occurred. A better understanding of the global order can lead to new ideas of shaping socioeconomical policies, especially with magnified challenges and diminished resources.new global order, economic power, influencing centres,economic crisis

Structural and physical properties of antibacterial Ag-doped nano-hydroxyapatite synthesized at 100°C

Synthesis of nanosized particle of Ag-doped hydroxyapatite with antibacterial properties is in the great interest in the development of new biomedical applications. In this article, we propose a method for synthesized the Ag-doped nanocrystalline hydroxyapatite. A silver-doped nanocrystalline hydroxyapatite was synthesized at 100°C in deionized water. Other phase or impurities were not observed. Silver-doped hydroxyapatite nanoparticles (Ag:HAp) were performed by setting the atomic ratio of Ag/[Ag + Ca] at 20% and [Ca + Ag]/P as 1.67. The X-ray diffraction studies demonstrate that powders made by co-precipitation at 100°C exhibit the apatite characteristics with good crystal structure and no new phase or impurity is found. The scanning electron microscopy (SEM) observations suggest that these materials present a little different morphology, which reveals a homogeneous aspect of the synthesized particles for all samples. The presence of calcium (Ca), phosphor (P), oxygen (O), and silver (Ag) in the Ag:HAp is confirmed by energy dispersive X-ray (EDAX) analysis. FT-IR and FT-Raman spectroscopies revealed that the presence of the various vibrational modes corresponds to phosphates and hydroxyl groups. The strain of Staphylococcus aureus was used to evaluate the antibacterial activity of the Ca10-xAgx(PO4)6(OH)2 (x = 0 and 0.2). In vitro bacterial adhesion study indicated a significant difference between HAp (x = 0) and Ag:HAp (x = 0.2). The Ag:Hap nanopowder showed higher inhibition

Antibacterial activity of silver-doped hydroxyapatite nanoparticles against gram-positive and gram-negative bacteria

Ag-doped nanocrystalline hydroxyapatite nanoparticles (Ag:HAp-NPs) (Ca(10-x)Ag(x)(PO(4))(6)(OH)(2), x(Ag) = 0.05, 0.2, and 0.3) with antibacterial properties are of great interest in the development of new products. Coprecipitation method is a promising route for obtaining nanocrystalline Ag:HAp with antibacterial properties. X-ray diffraction identified HAp as an unique crystalline phase in each sample. The calculated lattice constants of a = b = 9.435 Å, c = 6.876 Å for x(Ag) = 0.05, a = b = 9.443 Å, c = 6.875 Å for x(Ag) = 0.2, and a = b = 9.445 Å, c = 6.877 Å for x(Ag) = 0.3 are in good agreement with the standard of a = b = 9.418 Å, c = 6.884 Å (space group P6(3)/m). The Fourier transform infrared and Raman spectra of the sintered HAp show the absorption bands characteristic to hydroxyapatite. The Ag:HAp nanoparticles are evaluated for their antibacterial activity against Staphylococcus aureus, Klebsiella pneumoniae, Providencia stuartii, Citrobacter freundii and Serratia marcescens. The results showed that the antibacterial activity of these materials, regardless of the sample types, was greatest against S. aureus, K. pneumoniae, P. stuartii, and C. freundii. The results of qualitative antibacterial tests revealed that the tested Ag:HAp-NPs had an important inhibitory activity on P. stuartii and C. freundii. The absorbance values measured at 490 nm of the P. stuartii and C. freundii in the presence of Ag:HAp-NPs decreased compared with those of organic solvent used (DMSO) for all the samples (x(Ag) = 0.05, 0.2, and 0.3). Antibacterial activity increased with the increase of x(Ag) in the samples. The Ag:HAp-NP concentration had little influence on the bacterial growth (P. stuartii)

EXPERIMENTAL THERMAL SIMULATION OF THE HIGH AUDIO SPEAKER

This paper uses a thermal simulation model that can be applied to electromagnetic field and for the sound. Due to the symmetrical structure difuzorlui using AXI-symmetric pattern which significantly reduces computing time