Wearable Crop Sensor Based on Nano-Graphene Oxide for Noninvasive Real-Time Monitoring of Plant Water.

Real-time noninvasive monitoring of crop water information is an important basis for water-saving irrigation and precise management. Nano-electronic technology has the potential to enable smart plant sensors to communicate with electronic devices and promote the automatic and accurate distribution of water, fertilizer, and medicine to improve crop productivity. In this work, we present a new flexible graphene oxide (GO)-based noninvasive crop water sensor with high sensitivity, fast responsibility and good bio-interface compatibility.

Simultaneous development of both competitive and noncompetitive immunoassays for 2,2',4,4'-tetrabromodiphenyl ether using phage-displayed peptides.

Twenty-five phages that selectively bind to a monoclonal antibody (Mab) 1H2 specific to 2,2',4,4'-tetrabromodiphenyl ether (BDE47) in the absence or presence of BDE47 have been selected from phage-display libraries containing cyclic 7-mer, linear 7-mer, and linear 12-mer randomized peptides. Competitive and noncompetitive enzyme-linked immunosorbent assays (ELISA) for BDE47 were developed by using a clone C7-1 specific to the BDE47-free Mab 1H2 and a clone XC7-8 specific to the BDE47-bound Mab 1H2, respectively. The half-maximum signal inhibition concentration (IC50) of the competitive phage ELISA and the half-maximum signal enhancement concentration (EC50) of the noncompetitive phage ELISA for BDE47 were 6.