The phrase "modified by heat" is correct and usable in written English.
It can be used to describe a material or substance that has been altered in some way due to exposure to heat. For example, "The plastic was modified by heat, causing it to warp and buckle".
During a heating, an equilibrium stratification is observed in the atmosphere, compatible with a filling box mechanism modified by heat exchanges with the boundaries.
Besides crystallinity of TiO2 can be modified by heat treatment, its pore structure can be postulated by adding different amount of polyethylene glycol (PEG).
In addition, the surfaces of the acetylene blacks were modified by heat treatments from 1000 °C to 2800 °C, which resulted in a morphological change from surfaces covered with protruding graphene sheets to ones wrapped with basal planes of graphite.
Their surface properties were modified by heat treatment at 300 600 °C in an argon atmosphere, and their acid properties were characterized by quasi-equilibrium temperature desorption of ammonia and by acid base titration.
We estimated how heat wave mortality effects were modified by heat wave characteristics (intensity, duration, timing in season).
The granulosa cell layer was removed by gentle rubbing with a glass Pasteur pipette, previously modified by heat sealing the tip into a rounded smooth surface.
The influence of the surface functionality on the formation of ZSM-5 nanoparticles was also studied with an activated carbon, of which surface functionality was modified by heat-treatment and nitric acid-treatment.
The polyacrylonitrile was modified by heating with aqueous 50%H2SO44 or with aqueous 50% NaOH.
Two activated carbons of different origins were modified by heating at 950 °C either with or without previous urea impregnation.
The radar signature of dusty plasma (polar mesospheric summer/winter echoes) is modified by heating the surrounding plasma (e.g. Havnes et al. 2003; Kavanagh et al. 2006), allowing the dust properties such as grain size and charge to be inferred.
Also, this system is modified by incorporating heat recovery options for low performing units.
