Reverse Logistics Of E-waste In Developing Countries: Challenges And Prospects For The Brazilian Model

E-waste reverse logistics initiatives in important industrial economies like India, China and Brazil show that specific models of reverse logistics, adapted to local reality, are required in developing countries. This research objective is to discuss the main challenges and opportunities for the implementation of the reverse logistics Brazilian model for computers and cell phones. Methodological procedures included 21 in-depth interviews with multiple stakeholders including government, manufacturers, retailers, recycling companies, waste picker organizations and academics. Results show the importance of the new regulation to enhance the dialogue among the members of the electro electronic supply chain for the development of the Brazilian model of reverse logistics. However technological gaps in recycling e-waste within the country, its continental dimension, taxation challenges and conflicts between waste picker organizations and the industry are challenges for the Brazilian model success.19211713

Knowledge Transposition from Tropical Fish Serum Proteins to Fundamental Education Students Through Biochemical Models

The subject was represented and discussed at The National Week of Science and Technology, UFPE, an initiative from The Ministry of Science and Technology to encourage children and people in science and technology activities. The work aimed to renew the importance to transmit knowledge from simple, imaginative, biochemical models and interactive teaching. The stand tool contained an aquarium with fishes, five scale models showing peptide bond, carbohydrate inhibited lectin molecule, hemagglutination reaction, lectin-bacterium surface interaction and enzyme-substract-inhibitor. Posters described tropical fish importance and methods applied to obtain fish serum and organs to purify lectins and protein inhibitors as well as to extract tissue DNA; notions were transmitted on fish immunology and diseases. The students were attracted and impressed with the exotic fishes most cultivated in Brazil; they asked if it is necessary to kill the fish to extract lectin and about lectin importance. Students were also interested to know if all fish enzyme/inhibitors are favorable to the own fish organism. The work succeeded to inform and stimulate future scientists in the field and to awake their scientific curiosity