Adding bits of irradiated plastic water bottles could cut cement industry’s carbon emissions.
MIT undergraduate students have found that, by exposing plastic flakes to small, harmless doses of gamma radiation, then pulverizing the flakes into a fine powder, they can mix the plastic with cement paste to produce concrete that is up to 20 percent stronger than conventional concrete.
CORVALLIS, Ore. – Engineers at Oregon State University have used “additive manufacturing” to create an improved type of glucose sensor for patients with Type 1 diabetes, part of a system that should work better, cost less and be more comfortable for the patient.
A key advance is use of electrohydrodynamic jet, or “e-jet” printing, to make the sensor. Conceptually, e-jet printing is a little like an inexpensive inkjet printer – but it creates much finer drop sizes and works with biological materials such as enzymes, instead of ink.