By definition, the glass transition temperature (actually a small temperature range), therefore, is that below which the material is not relaxed on the time scale of a measurement (glass), whereas above that temperature, the material is relaxed (liquid).
Does a small temperature rise actually matter?
Over the past several years, we have adopted a novel approach to the study of real-time changes in foot temperature during daily activity, using a small temperature-measuring and recording device that can be affixed directly to the foot (14, 15).
When a lower cold end temperature, a smaller temperature overshoot, and/or a longer holding time are/is required, a larger cross-sectional area at the cold end is recommended.
This takes longer because there is a smaller temperature gradient to drive heat flow, but, even with the longer cooking time, can keep the reactions that would overcook the outside at near-boiling temperatures to a minimum.
A relatively small temperature rise can thus lead to an unexpectedly large increase in sea level.
"The body works in a very small temperature range," said Dr. Lawrence Robinson, deputy health commissioner of Philadelphia.
The temperature scanning plug flow reactor enables the investigation of reactions over a wide temperature range with a small time exposure.
He coined the term "greenhouse effect" and provided an explanation for the relatively small temperature difference between daytime and night-time on the Earth - and the development of a climate that was, among other things, suitable for human beings.
Residence times are small, temperature and pressure can as be high as 1500°C and 40 bar, respectively, ensuring low tar production [9].
The thermal conductivity determination by means of the thermal probe is a classical non-stationary method, suitable for foodstuffs because of the relatively short period of time and the small temperature rise required during experimental measurements.
