The phrase "altered by external" is correct and usable in written English.
It can be used when discussing changes or modifications that are influenced or caused by outside factors or forces.
Example: "The results of the experiment were altered by external conditions, leading to unexpected outcomes."
Alternatives: "modified by outside" or "changed by external factors".
In higher eukaryotes cellular shape is a dynamic element which can be altered by external and internal factors (i.e. surface interactions, temperature, ionic strength).
It is now a well-known fact that the phase of electron waves is altered by external magnetic fields via the Aharonov Bohm effect.
The physical and chemical characteristics of biomaterial surface and hydrogels can be altered by external stimuli, such as light irradiation, temperature changes, pH shifts, shear stress forces, electrical forces, and the addition of small chemical molecules.
The tests are carried out to search for new types of these liquids, such as fluids, whose properties can be altered by external influences.
Recent evidence also indicates that scale-free structure can be altered by external stimulus, such as nerve stimulation [33], performance feedback [34], music [35], imaginary and visual motor-tracking [36].
Fetal development can be altered by external factors as demonstrated by the human experience with the synthetic estrogen diethylstilbestrol (DES), prescribed to prevent miscarriage between 1947 and 1971.
Since the redox state of polyaniline can be continuously altered by the external potential during charging and discharging process, the addition of FeCl3 (or FeCl2) in the electrolyte works as chemical oxidant (or reductant) to oxidize (or reduce) the reduced (or oxidized) polyaniline to offer extended capacitance.
The training protocol was also progressively altered by applying external load, as a percent of lean body mass, and increasing exercise duration (see Table 1).
In conventional hole-burning spectroscopy, the density of states of the chromophore is altered by an external laser that "burns a hole" in the absorption or emission spectrum.
Furthermore, as a first exploratory study to use different genotypes with different pathologies, it is interesting to note that the gut microbiota of 3 different phenotypes (and 2 genotypes) was possibly altered by an external factor such as exercise.
The resistance of the RRAM device can be altered by simply applying external bias across the MIM stack.
