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Dissection of the antitumor mechanism of tetrandrine based on metabolite profiling and network pharmacology
CONCLUSIONS: The metabolism features of tetrandrine and its potential antitumor mechanism were summarized, providing data for further pharmacological validation.PMID:38073199 | DOI:10.1002/rcm.9662 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - December 11, 2023 Category: Chemistry Authors: Cheng-Jun Liu Hong-Xin Li Yong-Ming Zhang Wei Shi Feng-Xiang Zhang Source Type: research

Three combustion reactions in a single elemental analysis and isotope ratio mass spectrometry acquisition as a strategy to save helium and energy
Rapid Commun Mass Spectrom. 2024 Jan 15;38(1):e9663. doi: 10.1002/rcm.9663.NO ABSTRACTPMID:38073200 | DOI:10.1002/rcm.9663 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - December 11, 2023 Category: Chemistry Authors: Jorge E Spangenberg Source Type: research

Improving the accuracy of δ 18 O and δ 17 O values of O 2 measured by continuous-flow isotope-ratio mass spectrometry with a multipoint isotope-ratio calibration
CONCLUSIONS: No significant bias is introduced on the δ18 O scale when applying a one-point calibration with O2 from ambient air during O2 isotope analysis. Both O2 formation and consumption experiments, however, indicate a δ17 O scale compression. Consequently, δ17 O values cannot be measured accurately by GC/IRMS with a one-point calibration without determining the δ17 O scale correction factor, e.g. with the O2 formation experiments described here.PMID:38073201 | DOI:10.1002/rcm.9652 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - December 11, 2023 Category: Chemistry Authors: Carolina F M de Carvalho Moritz F Lehmann Sarah G Pati Source Type: research

On-line chloride removal from ion chromatography for trace-level analyses of phosphite and other anions by coupled ion chromatography-inductively coupled plasma mass spectrometry
CONCLUSIONS: The on-line removal mechanism works well for simplifying sample matrices. It removes the need for costly pre-analytical sample treatment with OnGuard columns. We confirm that IC/ICPMS is the most powerful technique for quantifying phosphite in natural solutions. The new chloride-removal method may also be applicable to analyses of other anions.PMID:38073202 | DOI:10.1002/rcm.9665 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - December 11, 2023 Category: Chemistry Authors: Abu S Baidya Eva E St üeken Source Type: research

Volatile fingerprints of beef cooking methods using sol-gel-based solid-phase microextraction (SPME) and direct analysis in real-time mass spectrometry (DART-MS)
CONCLUSIONS: The sol-gel-based solid-phase microextraction technique combined with DART-MS was successful in differentiating beef cooking methods based on their volatile fingerprints. A workflow for rapid assessment of the volatile profile from beef cooking methods was established, providing a baseline to further explore volatile profiles from other key ingredients.PMID:38073203 | DOI:10.1002/rcm.9655 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - December 11, 2023 Category: Chemistry Authors: Arvind K Subbaraj Santanu Deb-Choudhury Enrique Pavan Carolina E Realini Source Type: research

Unusual modifications of protein biomarkers expressed by plasmid, prophage, and bacterial host of pathogenic Escherichia coli identified using top-down proteomic analysis
CONCLUSIONS: TDP analysis, coupled with other techniques (e.g., antibiotic induction, chemical reduction, plasmid sequencing, and in silico protein modeling), is a powerful tool to identify proteins (and their modifications), including prophage- and plasmid-encoded proteins, produced by pathogenic microorganisms.PMID:38073204 | DOI:10.1002/rcm.9667 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - December 11, 2023 Category: Chemistry Authors: Clifton K Fagerquist Yanlin Shi Jihyun Park Source Type: research

Analytical improvements and assessment of long-term performance of the oxidation-denitrifier method
CONCLUSIONS: The methodological improvements significantly increase sample throughput without compromising analytical precision or accuracy down to 1 nmol of N.PMID:38073197 | DOI:10.1002/rcm.9650 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - December 11, 2023 Category: Chemistry Authors: Simone Moretti Nicolas N Duprey Alan D Foreman Anthea Arns Sven Br ömme Jonathan Jung Xuyuan E Ai Alexandra Auderset Aaron L Bieler Camino Eck Jesse Farmer Barbara Hinnenberg Matthew Lacerra Jennifer Leichliter Tina L üdecke Sergey Oleynik Florian Rubac Source Type: research

Identifying drug targets with thermal proteome profiling using IBT-16plex
CONCLUSIONS: IBT-16plex can be a cost-effective replacement for TMTpro-16plex for TPP applications.PMID:38073198 | DOI:10.1002/rcm.9673 (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - December 11, 2023 Category: Chemistry Authors: Zhaomei Shi Yan Ren Shuwei Li Piliang Hao Source Type: research