Fibrous membranes of poly(ethylene oxide)/Sesbania gum oxide/ε-poly(lysine): An influence on its structure.

Hydrogen peroxide (HO) was used to modify a natural polymer, sesbania gum (SG), to prepare oxidized sesbania gum (OSG) with the aim of investigating the physicochemical properties, antimicrobial activity of polyethylene oxide (PEO), OSG, and ε-poly(lysine) (ε-PL) composite fibre membranes and their applications in fresh-cut mango preservation. The PEO/OSG/ε-PL composite fibre membranes were successfully prepared via solution blow spinning (SBS) technology. The results of a series of characterizations revealed that ε-PL was successfully loaded into the fibrous membranes, exhibited good biocompatibility, and ε-PL was better encapsulated, with the membranes.

Compact and full-range carbon dioxide sensor using photoacoustic and resonance dependent modes.

A compact and robust optical excitation photoacoustic sensor with a self-integrated laser module excitation and an optimized differential resonator was developed to achieve high sensitivity and full linear range detection of carbon dioxide (CO) based on dual modes of wavelength modulated photoacoustic spectroscopy (WMPAS) and resonant frequency tracking (RFT). The integrated laser module equipped with three lasers (a quantum cascade laser (QCL), a distributed feedback laser (DFB) and a He-Ne laser) working in a time-division multiplexing mode was used as an integrated set of spectroscopic sources for detection of the designated concentration levels of CO. With the absorption photoacoustic mode, the WMPAS detection with the QCL and DFB sources was capable of CO detection at concentrations below 20 %, yielding a noise equivalent concentration (NEC) as low as 240 ppt and a normalized noise equivalent absorption coefficient (NNEA) of 4.

One to All: Toward a Unified Model for Counting Cereal Crop Heads Based on Few-Shot Learning.

Accurate counting of cereals crops, e.g., maize, rice, sorghum, and wheat, is crucial for estimating grain production and ensuring food security.

Soil infiltration mechanisms under plant root disturbance in arid and semi-arid grasslands and the response of solute transport in rhizosphere soil.

The symbiotic relationship between plant roots and soil infiltration is of great significance for sustainable development of the agriculture and forestry. Through detailed summary of the relationship between root morphological parameters and soil infiltration rates in arid and semi-arid grasslands mainly with leguminous herbs, gramineous herbs and shrubs, the mechanisms that key parameters (root length density, surface area density, diameter, biomass density, architecture, secretion and decay rate) disturb soil infiltration through affecting soil structure such as porosity, soil bulk density and soil organic matter (SOM) are elucidated. Furthermore, the degree of root disturbance on soil structure and infiltration rates are partially clarified by constructing quantitatively structural equation modeling path diagrams.