On the coattails of globalization: migration, migrants and COVID-19 in Asia

Positioning migrants as quintessential globalisation subjects, this paper reveals how the COVID-19 pandemic has exposed the ambivalent positioning of migration as a pathway for human development. Drawing on interviews with international and domestic labour migrants from Bangladesh, India, Laos and Myanmar working in Laos, Myanmar, China, Singapore and Thailand, the paper explores the vulnerabilities, challenges and opportunities that have come with migration and how these have been reconfigured as the pandemic has progressed, disproportionately heightening migrants’ exposure to the virus and their socioeconomic precarity. Through their personal stories, the paper provides insights into the evolving livelihood pathways of migrant workers during the course of the COVID-19 pandemic, their (changing) views of migration as a route to progress, and tentatively sets out how ruptures caused by the pandemic may lead to a re-thinking of livelihood pathways for such men and women and their families

Optimization of enzymatic ring-opening copolymerizations involving -gluconolactone as monomer by experimental design

Enzymatic incorporation of carbohydrate-derived monomer units into hydrophobic polyester backbones represents a promising alternative to obtain new biodegradable oligomers and polymers. Immobilized lipases are efficient biocatalysts for copolymerization of β-butyrolactone and δ-gluconolactone, but only a systematic optimization study was able to highlight the influence of the main reaction parameters on the polymerization degree and on the relative copolymer content of the product. Therefore, experimental design was employed for determination of the optimal ring-opening copolymerization conditions in solventless reaction systems, at temperatures up to 80 °C. The obtained products, cyclic and linear polyesters, have been characterized by FT-IR, MALDI-TOF MS, NMR, and TG analysis, demonstrating the incorporation of gluconolactone unit(s) into the hydrophobic backbone of the polyester and the formation of new bio-based products