Burning material remains a failure in a circular economy perspective.
"The possibility of terrorists obtaining nuclear or other radioactive material remains a grave threat," he said.
But quite how pointing out (a) that such readers exist and (b) that they won't like a certain type of book they feel they've been hoodwinked into buying makes me an elitist jerk (let alone face-stabbing material) remains a mystery to me.
Absence of high-performance anode material remains a challenge to commercialize SIBs.
The HGs/S cathode material remains a high discharge capacity of 810 mAh g−1 after 200 cycles at 0.5C rate.
However, because overall performance is extremely sensitive to fabrication conditions, optimal processing of the raw material remains a challenge.
Nevertheless, to the best of our knowledge, a simple and effective strategy for the preparation of iron-based material remains a great challenge.
Although reducing the size of the nanoparticles improves the physicochemical properties and provides useful performance characteristics, the safety of the material remains a major concern.
However, the reliable p-type doping of the material remains a major challenge because of the self-compensation from native donor defects (VO and Zni) and/or hydrogen incorporation.
Typically, a cloud of material remains a substantial distance from the star before the fusion reaction ignites.
