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Indoor PM 2.5 , particulate matter no more than 2.5 μm in aerodynamic equivalent diameter, has very high spatiotemporal variabilities; and exploring the key factors influencing the variabilities is critical for purifying air and protecting human health. Here, we conducted a longer-term field monitoring campaign using low-cost sensors and evaluated interand intra-household PM 2.5 variations in rural areas where energy or stove stacking is common. Household PM 2.5 varied largely across different homes but also within households. Using generalized linear models and dominance analysis, we estimated that outdoor PM 2.5 explained 19% of the intrahousehold variation in indoor daily PM 2.5 , whereas factors like the outdoor temperature and indoor−outdoor temperature difference that was associated with energy use directly or indirectly, explained 26% of the temporal variation. Inter-household variation was lower than intrahousehold variation. The inter-household variation was strongly associated with distinct internal sources, with energy-use-associated factors explaining 35% of the variation. The statistical source apportionment model estimated that solid fuel burning for heating contributed an average of 31%−55% of PM 2.5 annually, whereas the contribution of sources originating from the outdoors was ≤10%. By replacing raw biomass or coal with biomass pellets in gasifier burners for heating, indoor PM 2.5 could be significantly reduced and indoor temperature substantially increased, providing thermal comforts in addition to improved air quality.

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This study aimed to examine the relationship between difficulties in emotion regulation and emotional eating and the role of impulsivity and depressive symptoms in mediating this chain. Four hundred ninety-four undergraduate students participated in the study. A self-designed questionnaire was used in the survey from February 6 to 13, 2022, to finish our purpose, including the Emotional Eating Scale (EES-R), Depression Scale (CES-D), the Short Version of the Impulsivity Behavior Scale (UPPS-P) and Difficulties in Emotion Regulation Scale (DERS). Results showed that 1) There was a positive correlation between difficulties in emotion regulation, impulsivity, depressive symptoms, and emotional eating, respectively.2) Impulsivity and depressive symptoms mediated the relationship between emotion regulation and emotional eating separately. 3) Impulsivity and depressive symptoms played the mediating chain role between emotion regulation and emotional eating.

This study aimed to examine the relationship between difficulties in emotion regulation and emotional eating and the role of impulsivity and depressive symptoms in mediating this chain. Four hundred ninety-four undergraduate students participated in the study. A self-designed questionnaire was used in the survey from February 6 to 13, 2022, to finish our purpose, including the Emotional Eating Scale (EES-R), Depression Scale (CES-D), Short Version of the Impulsivity Behavior Scale (UPPS-P) and Difficulties in Emotion Regulation Scale (DERS). The results showed that 1) difficulties in emotion regulation, impulsivity, depressive symptoms, and emotional eating were correlated; 2) impulsivity and depressive symptoms separately mediated the relationship between difficulties in emotion regulation and emotional eating; 3) impulsivity and depressive symptoms played a chain mediating role between difficulties in emotion regulation and emotional eating. The current study provided a better understanding of the psychologically related pathway of emotional eating. The results would be helpful for prevention and intervention of emotional eating among undergraduate students.