Characterization of the key aroma-active compounds causing the Douchi aroma in high-temperature Daqu via integrated molecular sensory science, metabolomics, and molecular docking.

"Qu is the backbone of Baijiu", and the production of premium Baijiu depends on high-quality Daqu. The Douchi aroma is a key sensory indicator of Daqu quality. However, the specific aroma-active compounds responsible for this characteristic remain unclear.

Evaluating geographic accessibility to COVID-19 vaccination across 54 countries/regions.

Background: The COVID-19 pandemic has revealed significant disparities in global vaccine accessibility, particularly affecting low and middle-income countries (LMICs). However, current research on COVID-19 vaccine accessibility primarily focuses on individual countries or high-income countries (HIC). We aimed to evaluate geographic accessibility to COVID-19 vaccination on a multicountry scale, covering comparisons across LMICs and HICs.