Correlation of T2 NMR with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si133.svg" display="inline" id="d1e821"> <mml:mrow> <mml:msub> <mml:mrow> <mml:mi>T</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>g</mml:mi> </mml:mrow> </mml:msub>

Using both literature and new experimental data, we demonstrate that <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow> <mml:mrow><mml:mn>2</mml:mn></mml:mrow> </mml:msub> </mml:math> relaxation times are governed by the ratio <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow> <mml:mrow><mml:mi>g</mml:mi></mml:mrow> </mml:msub> <mml:mo>/</mml:mo> <mml:mi>T</mml:mi></mml:mrow> </mml:math> , where <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow> <mml:mrow><mml:mi>g</mml:mi></mml:mrow> </mml:msub> </mml:math> is the moisture-dependent glass transition temperature and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>T</mml:mi></mml:math> is the actual temperature. This ratio, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow> <mml:mrow><mml:mi>g</mml:mi></mml:mrow> </mml:msub> <mml:mo>/</mml:mo> <mml:mi>T</mml:mi></mml:mrow> </mml:math> , is known to control the viscosity and plasticizing behavior of small carbohydrates, as well as the rheological properties of biopolymeric systems such as starch and plant proteins. For small carbohydrates, the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow> <mml:mrow><mml:mn>2</mml:mn></mml:mrow> </mml:msub> </mml:math> data collapse onto a universal master curve, analogous to their viscosity behavior. For biopolymers, however, the current dataset is insufficient to confirm the existence of such a master curve. Additionally, we show that <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow> <mml:mrow><mml:mn>2</mml:mn></mml:mrow> </mml:msub> </mml:math> NMR provides an accurate estimate of the glass transition temperature of small carbohydrates, with deviations within 1%-2%. This makes it a promising method for high-throughput screening of the plasticizing properties of novel sugar replacers.