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Green and High Throughput HPTLC Method for Simultaneous Estimation of Celecoxib and Tramadol Hydrochloride in their Newly Approved Analgesic Combination and Spiked Plasma with Dichromic Green and Blue Assessments.
J Chromatogr B Analyt Technol Biomed Life Sci
December 2024
Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Pharos University in Alexandria, Canal El Mahmoudia Street, Beside Green Plaza Complex 21648, Alexandria, Egypt.
The FDA "Food and Drug Administration" recently approved a novel co-crystal formulation of Celecoxib (CEX) and Tramadol (TRM) for the treatment of adults suffering from moderate to severe pain in several conditions. This novel combination has advantages over co-administration of the two drugs individually as better patient compliance, synergism and lower therapeutic cost. This work presents the first "High performance Thin Layer Chromatographic" (HPTLC) quantitative analytical technique for CEX and TRM simultaneous assay in bulk, their new dosage form and plasma.
View Article and Find Full Text PDFSmart pH-sensitive indicators based on rice starch/pectin/alginate loading Lambrusco pomace extract and curcumin to track the freshness of pink shrimps.
Int J Biol Macromol
December 2024
Department of Industrial Engineering, University of Salerno, via Giovanni Paolo II, 132, 84084 Fisciano, Italy.
This research is focused on the formulation and testing of green visual pH-sensitive indicators based on natural extracts from Curcuma Longa (CUR) and Lambrusco wine pomace (LAM), an Italian wine variety, incorporated into rice starch/pectin/alginate matrixes for non-destructively detecting shrimps freshness in real-time. The effect of the mixed indicators and their synergic combination on the properties and performances of indicators was investigated. Both the extracts and their combination showed pronounced pH responsiveness.
View Article and Find Full Text PDFA Cu/FeO@CN tandem catalyst for efficient ammonia electrosynthesis from nitrate reduction.
J Colloid Interface Sci
November 2024
Inner Mongolia Key Laboratory of Rare Earth Catalysis, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, PR China. Electronic address:
Article Synopsis
- Electrochemical nitrate reduction reaction (ENORR) is an eco-friendly method for producing ammonia while treating wastewater, but creating efficient catalysts is challenging due to complex reactions.
- The study introduces a tandem catalyst, Cu/FeO@CN, which shows impressive performance in nitrate reduction to ammonia with a Faradaic efficiency of 96.57% and a high yield rate under optimal conditions in alkaline medium.
- This catalyst demonstrates remarkable stability and durability, aided by the synergetic effects of its components—Cu promotes nitrate adsorption, while FeO enhances water dissociation for efficient hydrogenation, collectively lowering energy barriers for the reaction.
Biological Nitrification Inhibitors with Antagonistic and Synergistic Effects on Growth of Ammonia Oxidisers and Soil Nitrification.
Microb Ecol
November 2024
Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), University of Hohenheim, Garbenstr. 13, 70599, Stuttgart, Germany.
Biological nitrification inhibition (BNI) refers to the plant-mediated process in which nitrification is inhibited through rhizospheric release of diverse metabolites. While it has been assumed that interactive effects of these metabolites shape rhizosphere processes, including BNI, there is scant evidence supporting this claim. Hence, it was a primary objective to assess the interactive effects of selected metabolites, including caffeic acid (CA), vanillic acid (VA), vanillin (VAN), syringic acid (SA), and phenylalanine (PHE), applied as single and combined compounds, against pure cultures of various ammonia-oxidising bacteria (AOB, Nitrosomonas europaea, Nitrosospira multiformis, Nitrosospira tenuis, Nitrosospira briensis) and archaea (AOA, Nitrososphaera viennensis), as well as soil nitrification.
View Article and Find Full Text PDFHighly selective nitrate reduction to N by Cu-nZVI/LDH bimetallic composite: Mechanism, reaction pathway and strategy for enhanced N formation.
J Hazard Mater
December 2024
College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian 350118, China. Electronic address:
Due to the highly reductive capacity of nano zero-valent iron (nZVI), the reduction of nitrate (NO-N) is prone to produce ammonia (NH-N) as a by-product and has low selectivity for nitrogen gas (N). Selective conversion of NO-N to harmless N by regulating reaction pathway is the key to improve the reduction and nitrogen removal performance of nZVI-based materials. In this study, metal copper (Cu) was added to nZVI to prepare Cu-nZVI/LDH bimetallic composites.
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