Large scale applications of microbial fuel cells (MFCs) have been severely hindered by several problems such as high internal resistance, low power output, expensive materials, and complicated configuration.
"This disaster has exposed several problems, such as the poor management of dangerous chemicals".
In particular, several problems such as robust stabilization and weighted H2/H∞-norm minimization are amenable to the randomized approach.
Current publication system had several problems such as high publication cost, awkward triple-pay system, opaque peer review process and copyrights issues.
The data analysis revealed several problems, such as an insufficient number of measurement gauges, improper installation of gauges, and incorrect understanding of the angular distortion during data interpretation.
However, they still suffer from several problems, such as poor cycling and rate capability, complex activation process steps and multiple procedures to import heteroatoms doping.
The engineering of such a system is challenging since it requires to address several problems such as: distributed workflow control, collective decision making and multiuser synchronous interactions.
However, PEGylation also led to several problems such as lower cellular uptake, difficult endosomal escape and much reduced transfection efficiency, which was described as "PEG dilemma".
However, several problems, such as low activity and poor stability (poor tolerance to high aldehyde concentrations), limit the practical application of DERA in large-scale production.
Current devices have several problems such as invasive approach for stabilization, poor sanitary control, and less flexibility to combine other surgical apparatuses.
However, the DMFC still faces several problems, such as sluggish methanol oxidation and oxygen reduction, as well as a high methanol crossover.
