(1R,3S)-Methyl 3-[(S)-2-(hydroxy­diphenyl­meth­yl)pyrrolidin-1-ylmeth­yl]-2,2-dimethyl­cyclo­propane­carboxyl­ate

The asymmetric unit of the title compound, C25H31NO3, prepared from (−)-1R-cis-caronaldehyde, contains three independent mol­ecules with similar conformations. The hydr­oxy groups are involved in intra­molecular O—H⋯N hydrogen bonds. The crystal packing exhibits weak inter­molecular O—H⋯O and C—H⋯O hydrogen bonds

A Machine Vision—Based Pipe Leakage Detection System for Automated Power Plant Maintenance

Industrial pipework maintenance inspection can be automated through machine vision-based effusion monitoring. However, colorless effusions such as water can be difficult to detect in a complex industrial environment due to weak illumination and poor visibility of the background. This paper deploys the reflective characteristics of effusion and its lower temperature compared to the environment in order to develop an automatic inspection system for power plant pipeworks’ maintenance. Such a system is aimed at detecting the colorless fluid effusion based on dual source images and a contour features algorithm. In this respect, a visible light source unit highlights the reflective features of the effusion edge. Meanwhile, high-definition images of the potential effusion are acquired under both visible and infrared lights. A customized image processing procedure extracts the potential effusion features from the infrared image to retrieve the region of interest for segmentation purposes and transfer such information to the visible light image to determine the effusion contour. Finally, a decision-making support tool based on the image contour closure is enabled for classification purposes. The implementation of the proposed system is tested on a real industrial environment. Experimental results show a classification accuracy up to 99%, demonstrating excellent suitability in meeting industrial requirements

Data from: Determination of sulfonamides in milk by capillary electrophoresis with PEG@MoS2 as a dispersive solid-phase extraction sorbent

A synthetic polyethylene glycol-molybdenum disulfide (PEG@MoS2) composite was prepared using a simple method, and the application of this material in dispersive solid-phase extraction (DSPE) was investigated for the enrichment of eight sulfonamides (SAs) in milk samples. The composite was characterized by energy dispersive spectroscopy, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and Brunner-Emmett-Teller measurements. The results showed that the MoS2 synthesized in the presence of PEG has the advantage of a larger surface area and that the adsorption effect of this MoS2 was enhanced. After extraction, the eight SAs were separated by capillary zone electrophoresis with a good linear relationship (R2 > 0.9902) in the range of 0.3-30 µg/mL and good precision (between 0.32% and 9.83%). Additionally, good recoveries (between 60.52% and 110.91%) were obtained for the SAs in the milk samples. The developed PEG@MoS2-based DSPE method could be applied for the enrichment of SAs in real milk samples

RSOS

RSO

Electronic Supplementary Material For Capillary electrophoresis determination of sulfonamides in milk with PEG@MoS2 as dispersive solid-phase extraction sorbent

Electronic Supplementary Materia

Selective Electrochemical Urea Synthesis from Nitrate and CO₂ Using <i>In Situ</i> Ru Anchoring onto a Three-Dimensional Copper Electrode

Urea (CO­(NH2)2) is the most common nitrogen fertilizer that is promoting food production worldwide due to its high nitrogen content. However, the conventional urea synthesis involving hydrogenolysis of nitrogen and C–N bond coupling requires harsh conditions and a massive carbon footprint. Herein, we report a promising technology for the green synthesis of urea using nitrate (NO3–) and carbon dioxide (CO2) under ambient conditions over Ru/Pt/Pd-modified three-dimensional copper foam (Ru/Pt/Pd-Cu CF) electrode. The Ru-Cu CF catalyst delivers a high urea yield of 151.6 μg h–1 cm–2 at a low onset potential of −0.3 V vs Ag/AgCl (0.13 V vs RHE) as well as an FE of 25.4%, surpassing that of Pt/Pd-Cu CF. Moreover, it is confirmed by operando electrocatalytic Raman spectroscopy and theoretical calculations that the *COOH intermediate is the rate-determining step of C–N bond coupling. Benefiting from the partial 3d states of surface Ru sites, the Ru-Cu CF electrode possesses the lowest formation energy of the *COOH intermediate to accelerate the urea synthesis. This work provides an extraordinarily sustainable strategy for green urea synthesis