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Study of the impurity profile of photodegradation in lomefloxacin hydrochloride ear drops using liquid chromatography combined with ion trap/time-of-flight mass spectrometry
CONCLUSIONS: The structural characteristics and fragmentation patterns of the photodegradation impurities were also studied. The study of the photodegradation impurity profile in lomefloxacin hydrochloride ear drops provides a scientific basis for quality control of these ear drops and ensures the safety of drug use by the public.PMID:38525499 | DOI:10.1002/rcm.9732 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - March 25, 2024 Category: Chemistry Authors: Hongxia Zeng Ying Yang Jiarui Gao Yuping Zhou Jinqi Zheng Source Type: research

Mass spectrometry imaging protocol for spatial mapping of lipids, N-glycans and peptides in murine lung tissue
CONCLUSIONS: Our protocol provides instructions on sample preparation for high spatial resolution MALDI-MSI, MS/MS data acquisition and lipid, N-glycan and peptide annotation and identification from murine lungs. This protocol will allow non-biased analyses of diseased lungs from preclinical murine models and provide further insight into disease models.PMID:38525810 | DOI:10.1002/rcm.9721 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - March 25, 2024 Category: Chemistry Authors: Yuen T Ngai Matthew T Briggs Parul Mittal Clifford Young Emma Parkinson-Lawrence Manuela Klingler-Hoffmann Sandra Orgeig Peter Hoffmann Source Type: research

Mass spectral characterisation of cyclic oligoesters in a biodegradable mulch film
CONCLUSIONS: Systematic analyses of the sort reported here are valuable for providing alternative approaches for the identification of plastic-related chemicals. Open publication of MS spectral data is required to build a greater understanding of the mulch film chemical components contributing to the environmental chemical load introduced to agroecosystems.PMID:38525923 | DOI:10.1002/rcm.9726 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - March 25, 2024 Category: Chemistry Authors: Charlie Monkley Michaela K Reay Richard P Evershed Charlotte E M Lloyd Source Type: research

Identification of multiple plasma lipids as diagnostic biomarkers of hypercholesterolemia and the underlying mechanisms based on pseudo-targeted lipidomics
CONCLUSIONS: This pseudo-targeted lipidomics study demonstrated that multiple sphingomyelins and cholesterol sulfate were differentially expressed in the plasma of patients with hypercholesterolemia. We also identified seven plasma lipids, including six sphingomyelins and cholesterol sulfate, with high diagnostic value.PMID:38504484 | DOI:10.1002/rcm.9723 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - March 20, 2024 Category: Chemistry Authors: Rui Zhao Yuqing Tang Wenhui Cao Lijuan Zhao Zhifeng Wu Xianghui Chen Yimin Li Xiaoe Jia Haihua Bai Source Type: research

Proposal and confirmation of N-(2-carboxyethyl)proline as a human endogenous metabolite
CONCLUSION: The results confirmed that N-(2-carboxyethyl)proline was a new metabolite in human feces and urine samples. In addition, our results demonstrated a case of successful identification of true unknown metabolite by knowledge-based hypothesis of possible metabolites followed by experimental confirmation with a synthetic standard.PMID:38504641 | DOI:10.1002/rcm.9734 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - March 20, 2024 Category: Chemistry Authors: Qibo Zhang Klaus-Peter Adam Source Type: research