A novel synthetic approach to 2,6-bis(acrylamido)pyridine (BAAPy) has been developed, producing a dual-function monomer able to self-crosslink while providing functional binding sites through its amide and pyridine groups. The monomer's structure and purity were confirmed through NMR, FTIR, and HPLC analyses. Poly(BAAPy) was subsequently synthesized and employed in the purification of stilbenes, including t-resveratrol, t-ε-viniferin, and t-piceatannol, all extracted from grape canes. These stilbenes, widely recognized for their antioxidant, antifungal, and antimicrobial properties, are valuable phytochemicals. Grape canes, a by-product of grapevine pruning, serve as a natural and cost-effective source of these bioactive compounds. Using a single-step adsorption–desorption process with an ethanol–water solvent system, the method achieved a 13-fold enrichment of stilbenes with gravimetric purities over 37%. The dual functionality of BAAPy eliminates the need for external crosslinkers and enhances adsorption capacity.
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Locally produced methane, - either as biomethane or power-to-gas product, has to be stored to provide a reliable gas source for the fluctuating demand of any local gas distribution network. Additionally, methane is a prominent transportation fuel but its suitability for vehicular application depends on the ability to store an adequate amount in the onboard fuel tank. Adsorption in porous materials could enable a simple, safe and cost-effective method for storing methane at ambient temperature and at reasonably low pressure. In this project we study and test the main thermodynamic and kinetic characteristics of methane adsorption and desorption on activated carbon. Both calculations and measurements are performed to enhance our knowledge about the general performance and the cyclic behavior of the adsorption and desorption processes.
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During crime scene investigations, numerous traces are secured and may be used as evidence for the evaluation of source and/or activity level propositions. The rapid chemical analysis of a biological trace enables the identification of body fluids and can provide significant donor profiling information, including age, sex, drug abuse, and lifestyle. Such information can be used to provide new leads, exclude from, or restrict the list of possible suspects during the investigative phase. This paper reviews the state-of-the-art labelling techniques to identify the most suitable visual enhancer to be implemented in a lateral flow immunoassay setup for the purpose of trace identification and/or donor profiling. Upon comparison, and with reference to the strengths and limitations of each label, the simplistic one-step analysis of noncompetitive lateral flow immunoassay (LFA) together with the implementation of carbon nanoparticles (CNPs) as visual enhancers is proposed for a sensitive, accurate, and reproducible in situ trace analysis. This approach is versatile and stable over different environmental conditions and external stimuli. The findings of the present comparative analysis may have important implications for future forensic practice. The selection of an appropriate enhancer is crucial for a well-designed LFA that can be implemented at the crime scene for a time- and cost-efficient investigation.
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