Search results

This paper aims to focus on the aqueous extraction of natural dye from haematoxylum campechianum L. bark for finishing the bio-mordant cotton fabrics producing value-added, environment-friendly textile products, for biomedical applications.

The study focuses on the creation of eco-friendly bio-mordant cotton fabric using gallic acid and gelatin, Al³⁺ and Fe²⁺ salts and metal mordant. The optimal pH for extraction, structural characterization and phytochemical analysis of the extracted dye were estimated using UV-visible spectrophotometer, FTIR and qualitative analysis. Variations in electrolyte concentration and pH medium were also considered. The study also examines build-up properties, colorimetric values and fastness characteristics of the colored fabrics.

All the dyed fabrics exhibit very good to excellent in terms of antimicrobial resistance against S. aureus and C. allbicans.

Pre-mordant cotton fabrics with Fe²⁺ and a combination of metal and bio-mordant show higher antibacterial resistance against P. aerugionsa. Further, bio-mordant and a combination of both mordant exhibit excellent UV protection and antioxidant activity performance compared to that of undyed fabrics.

This work opens up a huge potential for producing healthy bioactive-colored fabrics used in medical textiles and other usages.

Change in the economic status of a low-income country is accompanied by an expected increase in investment and economic activities along with land degradation and biodiversity loss. This study aims to explore Ghana's transition from a low-income to a lower-middle income economy, and the impact of the accompanying rise in extractive activities on the upstream cocoa supply chain (CSC) and its supporting ecosystem.

The author conducted interviews and made critical observations on Ghana's upstream CSC. Grounded theory (GT) and system dynamics (SD) methodologies were employed to extract and analyze themes from the data gathered. Causal loop diagrams were derived from the analyzed data to provide insight into the possible long-term structural behavior of the upstream CSC due to the change in Ghana's economic status.

The findings suggest that continuous increase in land capture by open-cast mining and logging concessionaires, poor environmental law enforcement and farmer discontentment could cause a decline in cocoa production and biodiversity.

This research could stimulate the identification of a most effective alternative policy (such as agroecological farming) to improve the living standards of upstream CSC partners and reduce biodiversity loss. The models herein could serve as a learning/demonstration tool for researchers, academia and policymakers when brainstorming students, or during stakeholder (community/society) engagement/consultation sessions, to discuss policy decisions and their consequences. The model approach could also be helpful when designing strategic land-use policies. This could improve understanding of the complex interdependent relationships and the consequences of land degradation, loss of biodiversity and rural livelihood from a system thinking perspective.