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An Input-Output Analysis: Linkages versus Leakages
Hugo Reis,Antnio Rua 한국국제경제학회 2009 International Economic Journal Vol.23 No.4
Resorting to input-output analysis, the relationships between production sectors are investigated. For such assessment, the distinction between imported and domestically supplied inputs, which has been disregarded so far in empirical analysis, is crucial. Besides an accurate measurement of domestic linkages, it also allows us to evaluate the importance of international trade in the production process. Moreover, the interaction between domestic linkages and leakages resulting from international trade can also be analysed. The study of such links improves our knowledge on the economic production structure and how it has evolved over time, which is essential for policy making. Using as a case study a small open European economy, the Portuguese one, we assess sectoral interdependence and trade effects for individual sectors as well as for the economy as a whole.
Lilian de Siqueira,Verônica Ribeiro dos Santos,Juliani Caroline Ribeiro de Araújo,Hugo Gutemberg Patiño de Oliveira Filho,Luana Marotta Reis de Vasconcellos,Eliandra de Sousa Trichês,Alexandre Luiz So 한국섬유공학회 2023 Fibers and polymers Vol.24 No.9
The development of new biomaterials with improved properties is a trend in tissue regeneration. In this way, an innovative approach is employed in this work for obtaining polymer fibers coated with nanoparticles resulting from the simultaneous application of poly (lactic acid) (PLA)/polycaprolactone (PCL) electrospinning and bioactive particles from an amorphous multicomponent silica–calcium–phosphorus system (AMS) electrospraying. The osteogenesis was evaluated in vitro and in vivo using male rats, in which total protein, alkaline phosphatase, and biological performance through histological and histomorphometric analysis were discussed. The morphological results assessed by scanning electron microscopy showed a mesh of PLA/PCL fibers associated with AMS. The spraying of 17.44% of AMS particles in the PLA/PCL electrospun fibers decreased the Young’s modulus and tensile strength. However, the amount of AMS particles sprayed was enough to promote a reduction of 17.8% in the measured contact angle values. Phosphatase alkaline higher mean value was also observed in the fibers when in contact with the AMS, but nonstatistical difference was observed (p > 0.05). It was possible to observe the presence of mineralized nodules deposited on the bottom of the plate and between the fibers. The newly formed bone into defect filled with PLA/PCL-AMS fibers was higher than that observed in the control group. These findings suggest PLA/PCL-AMS fibers as a multifunctional composite system that may be attractive for both bone and dental tissue engineering applications.