Online ISSN: 2515-8260

Keywords : size


Sorption Characteristics Of The Mesoporous Sorbents Based On Tetraethoxysilane And Titanium Oxide

J.R. Uzokov; N.K. Mukhamadiev

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 7, Pages 656-660

Samples of mesoporous sorbents based on tetraethoxysilane and titanium dioxide in an acidic medium were obtained using the sol-gel technology. The synthesized mesoporous sorbents are characterized by a large specific surface area of 700-950 m2 / g, as well as an average diameter of 2.6-6.5 nm and a low pore volume of 0.60-0.90 cm3 / g. It was found that a hysteresis loop is observed in the mesoporous sorbents during the adsorption of benzene and water vapors. The phase composition of the sorbents was studied by X-ray diffractometry (XRD), surface characteristics by a scanning electron microscope (SEM). The mesoporous sorbents can be used as a sorbent for gas chromatographic separation of light alkanes, olefins, aromatic hydrocarbons, alcohols, aldehydes, ketones, ethers and esters.

Sectoral Returns and Diversification: Empirical Evidence from Indonesia

Nandhi .

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 1, Pages 4061-4074

The Indonesian capital market is an emerging market that has a smaller number of issuers compared to other markets. Although the number of listed companies in the capital market is small, many of the listed companies do not fluctuate or sleeping. There is a lot of debate about the number of shares formed in the portfolio by investors to form a portfolio to achieve well-diversified portfolio. However, in the case of the Indonesian capital market, it is possible to form a portfolio to be well-diversified portfolio due to limitations in the Indonesian Capital Market. The development of the capital market is one measure of economic development in a country. One way to look at economic analysis is that analysis is needed first at the industry or sector level. Although in general there is no necessary relation between economic growth and industries growth, some industries may grow in spite of poor economic growth, but the whole industry is an economic activity that covers all economic activity that refers to growth or decline. This article aims to evaluate portfolio at the sector level in the study period. Using the meanvariance model, we form a portfolio in each sector. The purpose of portfolio performance assessment is to find out whether the portfolio is formed can increase the possibility of investment objectives, it can be known which portfolio from which sector is outperform to other sectors. This study shows how the premium value and size effect in each sector and main sector.