Search results
1 – 3 of 3Md. Raijul Islam, Ayub Nabi Nabi Khan, Rois Uddin Mahmud, Shahin Mohammad Nasimul Haque and Md. Mohibul Islam Khan
This paper aims to evaluate the effects of banana (Musa) peel and guava (Psidium guajava) leaves extract as mordants on jute–cotton union fabrics dyed with onion skin extract as a…
Abstract
Purpose
This paper aims to evaluate the effects of banana (Musa) peel and guava (Psidium guajava) leaves extract as mordants on jute–cotton union fabrics dyed with onion skin extract as a natural dye.
Design/methodology/approach
The dye was extracted from the outer skin of onions by boiling in water and later concentrated. The bio-mordants were prepared by maceration using methanol and ethanol. The fabrics were pre-mordanted, simultaneously mordanted and post-mordanted with various concentrations according to the weight of the fabric. The dyed and mordanted fabrics were later subjected to measurement of color coordinates, color strength and colorfastness to the washing test. Furthermore, the dyed samples were characterized by Fourier transform infrared, and different chemical bonds were analyzed by X-ray photoelectron spectroscopy analysis.
Findings
Significant improvement was obtained in colorfastness and color strength values in various instances using banana peel and guava leaves as bio mordants. Post-mordanted with banana peel provided the best results for wash fastness. Better color strength was achieved by fabric post-mordanted with guava leave extracts.
Originality/value
Sustainable dyeing methods of natural dyes using banana peel and guava leaves as bio mordants were explored on jute–cotton union fabrics. Improvement in colorfastness and color strength for various instances was observed. Thus, this paper provides a promising alternative to metallic salt mordants.
Details
Keywords
Md Mohibul Islam, Anders Isaksson and Mohammad Ali Tareq
This study investigates the ex-dividend day stock prices of the firms listed on the Dhaka Stock Exchange (DSE) where the tax rate is higher on dividends than on capital gains. The…
Abstract
This study investigates the ex-dividend day stock prices of the firms listed on the Dhaka Stock Exchange (DSE) where the tax rate is higher on dividends than on capital gains. The results help to explain what impact taxes have on the ex-day stock prices behavior in an emerging market.
To examine the tax effect on the ex-day stock prices behavior, this study considers after-tax dividends and computes the raw price ratio, market-adjusted price ratio, raw price drop, market-adjusted price drop. The market-adjusted ex-dividend day abnormal returns and relative trading volume are also examined to determine the direction of investor trading around the ex-day.
The main hypotheses examine whether the mean (median) differs from its theoretical value by using a t-test and nonparametric sign-rank test. The findings suggest that the drop of stock prices on the ex-day on the DSE is not due to taxes or transaction costs but to valuation assumptions made by investors in determining the equilibrium stock price.
Findings of this study will be useful for investors and traders in their valuation assumption to trade around the ex-dividend day.
Market participant’s preference of dividends, and exempted tax and its ultimate contribution to the equity value explain the ex-day stock prices behavior in the Dhaka Stock Exchange.
Details