The sentence fragment "is mostly applied in" is correct and usable in written English.
You can use it to express that something specifically applies or relates to a certain situation or context. For example: "This technique is mostly applied in the automotive industry but can also be useful in other areas."
In China, CO2 EOR technology is mostly applied in small scale field test after water flooding.
The L and LCL filters are widely used in grid-connected inverters, while the LC filter is mostly applied in uninterruptible power supplies or islanded microgrids [10, 11].
Similarly, carboxymethylcellulose is mostly applied in copolymers with other cellulose derivatives [13, 31]; there is much smaller interest toward blends with other low cost, renewable materials [32, 33].
Therapeutic thoracentesis is mostly applied in case of ineffective drug therapy or clinical symptoms such as dyspnea do not resolve fast enough [ 3].
It is mostly applied in an intensive care setting; only a few studies have evaluated its use within the first 24 postoperative hours [ 4, 5], although the optimum duration of treatment and ventilator settings are not defined [ 6, 7].
This seems to be promising, although it should be emphasised that this high-dose chemotherapy is mostly applied in a selected group of patients who already achieved a second CR.
The methods are mostly applied in less serious crimes, like property offenses in which the wrong can be clearly righted — stolen property returned, vandalized material replaced.
CFD has been mostly applied in areas such as mechanical, chemical and architectural engineering.
Considering that lithium-ion batteries are mostly applied in practice today, we mainly focus on lithium-ion batteries in this paper.
Process-based models that investigate either effects or responses of earthworms on soil environmental conditions are mostly applied in ecotoxicological and bioturbation studies.
In terms of analytical methods currently employed to adjust for selection bias, the review identified five broad categories, which were mostly applied in sample sizes of 5000 individuals or less.
