Application of FTIR-PAS in Rapid Assessment of Rice Quality under Climate Change Conditions.

Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS), versus attenuated total reflectance spectroscopy (FTIR-ATR) and diffuse reflectance spectroscopy (DRIFT), was firstly applied in quick assessment of rice quality in response to rising CO/temperature instead of conventional time-consuming chemical methods. The influences of elevated CO and higher temperature were identified using FTIR-PAS spectra by principal component analysis (PCA). Variations in the rice functional groups are crucial indicators for rice identification, and the ratio of the intensities of two selected spectral bands was used for correlation analysis with starch, protein, and lipid content, and the ratios all showed a positive linear correlation ( = 0.

Responses of rice qualitative characteristics to elevated carbon dioxide and higher temperature: implications for global nutrition.

Background: Protein and some minerals of rice seed are negatively affected by projected carbon dioxide (CO ) levels. However, an in-depth assessment of rice quality that encompasses both CO and temperature for a wide range of nutritional parameters is not available. Using a free-air CO enrichment facility with temperature control, we conducted a field experiment with two levels of CO (ambient; ambient + 200 ppm) and two levels of temperature (ambient; ambient + 1.