The phrase "activity has been performed" is correct and usable in written English.
It can be used to indicate that a specific action or task has already been completed.
Example: "The report indicates that the required activity has been performed successfully."
Alternatives: "activity has been completed" or "activity has been executed".
In particular, a modelling activity has been performed in order to optimise deareator design.
His main research activity has been performed in the realm of optically thin astrophysical plasmas (more specifically solar and stellar coronae, supernova remnants) and in the field of thermal and non-thermal (synchrotron) emission processes.
The research activity has been performed within the framework of the research project Intelligent Fault Tolerant Control in Integrated Systems-IFATIS- funded by the European Union.
In order to study the photocatalytic degradation of methylene blue (MB) dye using GO NSs as a photocatalyst, a sunlight driven photocatalytic activity has been performed.
The experimental investigation of the mapping of cavitational activity has been performed in the present work in a large scale sonochemical reactor operating at 40 kHz with a capacity of 72 L.
A wide experimental activity has been performed on the prototype system in order to test its functionalities in the integration in a smart grid available at the same ENEA lab, including a smart metering system.
Despite the intricate link between soil microbes and plants, many drying rewetting studies focusing on microbial community composition or activity have been performed on systems devoid of live plants, as incubations in soil alone or because plants died during the dry period preceding rewetting.
The anti-cancer activity have been performed by using MTT assay protocol and their results depicts that compounds having the 4-pyridyl or 4-carboxyphenyl substituents at the 8th position of the tryptanthrin framework are found to be the most promising cytotoxic agent against A549, MCF-7 and HeLa human cancer cell lines compared to others as well as with the standard drug cisplatin.
No previous studies on CYP3A activity have been performed in human colorectal cancer.
Type of evaluation conducted: Regular audits of system activity have been performed.
Indirect measurements of renal prostaglandin activity have been performed by observing the effects of the prostaglandin synthesis inhibitor, indomethacin.
