Fig. 6: Agroforestry and human health monitoring applications. | Nature Communications

Fig. 6: Agroforestry and human health monitoring applications.

From: High-performance solid-state proton gating membranes based on two-dimensional hydrogen-bonded organic framework composites

Fig. 6

a Schematic of the moisture contents monitoring in both the storing environment and the nurturing soil, such as farmland, orchard, and granary. The optical photograph of the gating device. b Response curve of the gating device situated within the dry soil sample, which was then moistened by ambient humidity, showing robust monitoring of humidity for up to 4 h. c Response curve of soil samples (i-iv) with varying moisture contents. d Schematic of the relationship between human respiratory rate and health. A low respiratory rate is associated with poisoning or heightened intracranial pressure. A high respiratory rate is often associated with high fever, pain, anemia, hyperthyroidism, or heart failure. e Response curves of human breathing corresponding to different respiratory rates, demonstrating the precise monitoring of respiratory frequencies at 2.01–1.44 Hz, 0.22–0.38 Hz, and 0.05–0.06 Hz by the proton gating device. f Schematic of gating device in series with Bluetooth. Such device was mounted in a mask for wireless monitoring of human respiration.

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