Development of a Sustainable Flexible Humidity Sensor Based on Larvae Biomass-Derived Chitosan.

This study presents the fabrication of a sustainable flexible humidity sensor utilizing chitosan derived from mealworm biomass as the primary sensing material. The chitosan-based humidity sensor was fabricated by casting chitosan and polyvinyl alcohol (PVA) films with interdigitated copper electrodes, forming a laminate composite suitable for real-time, resistive-type humidity detection. Comprehensive characterization of the chitosan film was performed using Fourier-transform infrared (FTIR) spectroscopy, contact angle measurements, and tensile testing, which confirmed its chemical structure, wettability, and mechanical stability.

[Nodular Gastritis as a Precursor Lesion of Atrophic and Metaplastic Gastritis].

Background/aims: Chronic atrophic gastritis (CAG) and metaplastic gastritis (MG) are precancerous conditions of ()-related gastric cancer. This study aimed to identify the characteristics of nodular gastritis (NG) showing CAG or MG after nodule regression.

Methods: -infected patients with NG were included after upper gastrointestinal endoscopy.