"uneven concentration" is a correct and usable phrase in written English.
It refers to a situation where something (such as attention or effort) is not evenly distributed or consistent. Example: "The students' grades reflected their uneven concentration in class. Some scored high on every assignment while others struggled to keep up."
In this case an uneven concentration of excited holes and electrons in an already low-doped semiconductor results in a low recombination rate.
While the causes were complex, there's no question that the uneven concentration of wealth, lack of transparency in the financial system, misalignment of return on capital, and complex financial instruments called derivatives, contributed to this period of tremendous turmoil in the U.S. economy.
The uneven concentration of Prx III immunoreactivity in hippocampus results not only from its function, but derives from its subcellular localisation in mitochondria.
Any deviation from the expected random distribution of sequences, e.g., the uneven concentration of A base rich sequences in a sub-region of the sequencing surface, would suggest problems in sequencing assays.
For Hispanics, on the other hand, the estimate changes drastically, no doubt because of the very uneven concentrations of Hispanics across states over much of this period.
The system is calibrated and optimized before the field experiments, especially the optimal structure of the helical capacitance sensor with a homogeneous sensitivity distribution is achieved by static tests to minimize the influence of the uneven particle concentration distribution on the particle concentration measurement accuracy.
Besides, the quite low and uneven mixture concentration near the spark plug brings negative influence on the flame kernel initiation and development.
Indeed, we detected metaphase cells with uneven patchy concentrations of CD133 on the opposite side of the cell cleavage line.
This might have been due to the bottom surface of the beam being uneven, causing stress concentrations.
Therefore, on higher NFC concentrations, uneven shrinkage and mechanical stress during the annealing can result in cracking and reduced PEDOT PSS film quality, and thus, a higher sheet resistance as observed in Fig. 3a.
It was found that stress concentration and uneven pressure distribution occur at the seal.
