The aim of the present study was to develop and characterize coated chitosan-alginate beads containing cefaclor as a controlled release delivery system. Coated cefaclor beads were prepared by solvent evaporation techniques. Beads were found to be intact and spherical in shape. Their size range was 1.05 to 2.06. The loading efficiency showed maximum value when the concentration of cefaclor, chit...

I incorporate heterogeneous trade costs into the model of Foellmi, Hepenstrick, and Zweimüller (2013) to analyze another reason for export zeros, additional to arbitrage constraints resulting from per capita income differences. In my model, high trade costs may be responsible for export zeros. The level of tariffs and transportation costs are crucial for patterns of international trade. I find ...

This paper exploits bilateral product-level trade for a wide range of OECD countries to derive export and import PPPs and terms of trade levels. This is based on a hedonic regression model in which a product is characterized by the location of both the buyer and seller. Relative price levels of imports and exports are significantly different from one in most countries, confirming the widespread...

Thirty group covariance data have been produced from ENDF/B VIII.0 MF 33 for H1, H2, He4, Li6, Li7, Be9, B10, B11, C12, C13, N15, O16, the JENDL O16 and F19. Multi-group cross section was by NJOY routine ERRORR. Negative eigenvalues were found only F19, but constraints required condition of sum partial sections being equal to resultant total be incorrect O16. An easy correction is suggested Li6...

A growing body of literature suggests that political factors are one of the major causes of environmental damage in developing countries endowed with a relative abundance of renewable resources. This has prompted calls for the use of trade sanctions to encourage sustainable resource management practices in these countries. This paper develops a model to assess the interaction between political ...

in this paper, i investigated the determinants of financial development with emphasis on social capital. first, i explain the relationship between financial development and its determinants, then estimate the model with gregory–hansen (1996) and johansen-juselious cointegration techniques in i.r. of iran (1971-2006). the results showed that, inflation and decline in social capital and weak prop...

National security depends on soft power, the ability of a country to generate and use its economic power and to project its national values. It also depends on long-term factors that contribute to economic growth and increase the total resources base available not only for defense but to provide economic security in the form of income and business opportunities for individuals. The economic iss...

this paper aims to estimate a model of demand for health insurance and medical care in iran in the presence of the heterogeneous and latent health status of individual; moreover it tests the asymmetry of information in the health insurance industry of iran. our dataset consists of whole family budget survey of 2006. the parameters of model are estimated by g.m.m method and the model used in thi...

in this paper, the effect of financial liberalization on household’s budget liquidity constraint is analyzed with the use of an error correction model. financial liberalization will decline liquidity constraint, with expanding means of making future incomes available for present consumption. here a financial liberalization index for iran is defined using principal component analysis technique, ...