Browsing by Author "Akram, Md. Washim"

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    Exploring Ultrasonic-Assisted Extraction and Eco-Friendly Dyeing of Organic Cotton using Syzygium cumini Leaf Extracts
    (2024-04-10) Akram, Md. Washim; Banna, Burhan Uddin; Mahmud, Sayed Hasan; Easmin, Shanzida; Repon, Md. Reazuddin
    The demand for natural dyes is increasing due to the negative environmental impacts of synthetic color. In fact, customers are becoming more concerned about their health and the environmentally friendly products. The aim of this research is to disclose the dye extraction process using the ultrasonic method and eco-friendly dyeing of organic cotton knitted fabric. Initially, 10 g of Syzyguim cumini leaf powder was dissolved in 150 mL of purified water maintaining a 1 : 15 M : L ratio to extract the color. After that, the extracted dye solution was added to coloration bath following the M : L ratios of 1 : 16, 1 : 12, and 1 : 8 for producing dark, medium, and light shades, respectively. Post mordanting was done using natural lemon juice for colorfastness improvement. The color attributes were revealed by the spectrophotometric analysis. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to comprehend the successful relationship that exists among SCL dyes and organic cotton fibers, and the TGA analysis confirmed that dyed fabric is more stable than undyed fabric. Moreover, the colored sample‘s pH, formaldehyde level, and presence of forbidden Azo groups (aromatic amines) were examined. The test results revealed that very good to excellent color fastness properties were obtained and no harmful chemicals were detected in the dyed samples
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    Migration and the socio-economic condition of informal labor market: a sociological study on Polashi and New market
    (University of Dhaka, 2015-04-09) Akram, Md. Washim
    Informal sector is a very important area of the economy for any developing country; it is a growing occupational sector for the less skilled people, living both in urban and rural areas. Considerable amount of employment are ensured by this sector. What is specific to the informal economy is the absence of rights and social protection of the workers involved in it. Living in extensive poverty; exploited, with no place to go for protection; lacking access to basic social services; no basic safety conditions at work; holding little or no hope that life can be better; struggling on a daily basis just to survive, they are street vendors, wage laborers working in small enterprises on a regular, casual or contract basis; unpaid workers including family workers and apprentices, home-workers, paid domestic workers and more; and a smaller number are the owners of tiny enterprises. Many people are migrated from different part of our country and they choose to work as an informal labor. This study concentrates on the workers and their work life and living standards.