Andrés Artal-Tur, Ahmed Farouk Ghoneim and Nicolas Peridy
The purpose of this paper is to study how proximity affects the trade-migration link. By focusing on two case studies, France and Egypt, the authors explore if migrants promote…
Abstract
Purpose
The purpose of this paper is to study how proximity affects the trade-migration link. By focusing on two case studies, France and Egypt, the authors explore if migrants promote and help to deal with market heterogeneity in international markets. Using an ethnic network approach the authors also test for interactions between the characteristics of migrants and proximity issues.
Design/methodology/approach
The paper builds on two case studies to illustrate the main working hypotheses. The main framework is that of ethnic networks, proximity ties, and market heterogeneity. Static and dynamic panel data methods are employed when estimating extended gravity trade equations. The authors account for country-pair fixed effects and instrument by lagged stocks of migrants, in order to deal with bilateral commonalities and endogeneity issues in the estimation procedure.
Findings
The paper provides evidence on how proximity enhances trade. Additional trade effects are found for countries sharing closer ties. Networks of migrants appear to help firms to deal with fixed trade costs, also generating some market heterogeneity that at the end influences the trade-migration linkage. Characteristics of migrants also seem to matter, interacting with proximity issues, and resulting in specific trade effects.
Practical implications
Proximity issues seem to matter in the trade creation effects of networks of migrants. In this way integration processes between countries would be showing some positive externalities in the side of trade flows. Characteristics of emigrants should be taken into account when defining migratory policies, mainly for the education and assimilation issues.
Originality/value
The paper get deeper insights in some emerging issues in the trade-migration literature by focusing in two relevant case studies.
Details
Keywords
Parisa Rousta, Mozhgan Shahamirian, Sedigheh Yazdanpanah and Alireza Shirazinejad
This study investigated the production of free and encapsulated nanoemulsions using Cordia myxa fruit peel (CMFP) extract and vitamin D3.
Abstract
Purpose
This study investigated the production of free and encapsulated nanoemulsions using Cordia myxa fruit peel (CMFP) extract and vitamin D3.
Design/methodology/approach
The CMFP extract was obtained using an ultrasonic technique, and its characteristics such as total phenolic content (TPC), antioxidant activity, cytotoxicity and gas chromatography-mass spectrometry (GC/MS) analysis were assessed. CMFP was encapsulated in vitamin D3 oil droplets of nanoemulsion prepared by ultra-homogenization using calcium alginate polymer. The nanoemulsions were evaluated for 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity, antimicrobial activity, morphology, Fourier transform infrared (FTIR) analysis and release rate in a simulated gastrointestinal model.
Findings
The GC/MS results revealed that pyrocatechol, cholestanoids and propionaldehyde were the predominant compounds in the extract. The highest cytotoxicity effect of CMFP was observed at concentrations of 6.25 and 12.5 ppm of the extract. Encapsulated nanoemulsions exhibited the highest antimicrobial activity against Escherichia coli (ATCC 35218). The antioxidant activity of the free and encapsulated nanoemulsions ranged from 25.81 to 36.08 mg/100g and 49.25–55.7 mg/100g, respectively. Free nanoemulsions showed a higher release rate in the simulated gastric model compared to encapsulated ones. The FTIR spectrum allowed for the identification of functional groups responsible for antioxidant and antibacterial properties, indicating that these properties of the nanoemulsions were maintained.
Originality/value
This study demonstrates the successful co-encapsulation of CMFP extract and vitamin D3 in nanoemulsions, which significantly enhanced the stability, bioavailability and functional properties of both compounds. Encapsulated nanoemulsions exhibited higher antioxidant and antimicrobial activities compared to their free counterparts, with controlled release in simulated gastrointestinal conditions. These findings confirm that nanoemulsion-based encapsulation is an effective strategy to protect and enhance the bioactivity of plant extracts and vitamins, supporting their potential use in functional food products and therapeutic application.