Organic chemical reactions cause the temperature rising during coal oxidation; however, because of the complex structure of coal, it is difficult to analyze and characterize the reactions involved in coal low-temperature oxidation.
Donor search is particularly challenging for partitioned unstructured meshes because of the complex irregular boundaries that are often created during partitioning.
However, despite all these research, the mechanism and process of SCWG of real biomass is not completely clear because of the complex structure of lignocellulosic biomass and interactions between components during the process.
The temporal and geographical diversification of Neotropical insects remains poorly understood because of the complex changes in geological and climatic conditions that occurred during the Cenozoic.
Because of the complex composition of Canephron®N, there may be less risk that bacterial resistance will develop than during antibiotic treatment of the same condition.
Because of the complex nature of this system, it can be difficult to assess whether the response of the system during a normal space environment can be applied to extreme conditions of solar wind.
Because of the complex nature of interactomes, such as that observed in the apoptosome complex during caspase formation [ 7, 8, 23], a nonlinear mathematical model provides better characterization than a linear model [ 24, 25].
In particular, the isolation of the highly sensitive compound 4 proved to be a very challenging task, because the complex decomposes during manipulation of solids and solutions of this complex.
The thermophysical and chemical effects of CO2 on the combustion characteristics of a single char particle in O2/CO2 environments remain unclear because these effects are intercoupled during the complex process of coal char combustion.
It is difficult to determine the state because the complex hydro-thermo-mechanical interaction usually occurs within the embankments during freezing-thawing processes.
