"There have been many proof-of-concept viruses that have gone nowhere," he said, "Not everything pans out".
Even though catalytic micromotors rely on toxic fuel for their propulsion, many proof-of-concept applications were shown.
Despite extensive success with many proof-of-concept systems there is still the need for optimization to achieve industrially relevant titers, yields, and productivities.
Many proof-of-concept photonics devices based on graphene, including photodetectors [10,11], ultrafast lasers [12,13], polarization controllers [14], and plasmonic structures [15-17] [15-17]een demonstrated.
Many proof-of-concept applications on the microscale demonstrate the potential of micromotors in the field of environmental science, sensing, and medical intervention.
This has not always been the case for many proof-of-concept studies.
Since a small sample size (of up to 350 patients) has insufficient power for clinically significant treatment targets (such as dyspnea relief or cardiovascular death), many proof-of-concept studies address surrogate endpoints so as to have adequate power.
At present, many proof-of-concept studies with disease-modifying drugs are focusing further upstream: on healthier people who are typically younger and have few things wrong and even few symptoms.
It was the latest of many proofs of Mr Brown's unpopularity, following by-election routs elsewhere, an abysmal showing at May's local elections, the loss of London's mayoralty to a Conservative and months of opinion polls that put the Tories up to 20 percentage points ahead of Labour.Mr Brown, with some justification, blames the economy.
Many proofs of concept studies have established the mechanical sensitivity of functionalized microcantilevers to a large spectrum of target molecules.
There exist many proofs of the PM formula (see, e.g., [11] or a recently obtained very short one in [12]).
