Results 151 to 160 of about 35,305 (286)

Source Fingerprinting of PFOA via Full- and Intramolecular Stable Isotope Ratios of Carbon Using Orbitrap-IRMS. [PDF]

Anal Chem
Nelson HM, Xu Z, Li H, Moran JJ.
europepmc   +1 more source

Chemical Profiling and Biological Activity of Copaiba Oil‐Resin Samples and Development of HPLC‐DAD Method for the Analysis of β‐Caryophyllene

Biomedical Chromatography, Volume 40, Issue 5, May 2026.
ABSTRACT The Copaifera species are traditionally used for their anti‐inflammatory, antiseptic and healing properties. The objective of this study was to compare the chromatographic profiles of seven samples of copaiba oil‐resin with respect to chromatographic and physicochemical properties and to evaluate their biological activities.
Gabriel de A. P. Graça, Cláudia G. Silva, Denise de O. Scoaris, Juliana Rodrigues de Vasconcelos, André Santos Alkimim, Vanessa C. F. Mosqueira, Luciana S. Salomon, Pietra Piotto Marcellini, Isabelle Renata Martins da Silva, Janete S. C. Santos, Andreia Fonseca Silva, Carolina P. S. Moreira, Júlio C. D. Lopes, Vera L. de Almeida   +13 more
wiley   +1 more source

Stable Nitrogen Isotope Analysis of Amino Acids by Orbitrap Mass Spectrometry: Application for Extraterrestrial Samples. [PDF]

Rapid Commun Mass Spectrom
McIntosh OM, Baczynski AA, Matney M, McLain HL, Farnsworth KK, Dworkin JP, Glavin DP, Elsila JE, Xie H, Freeman KH.   +9 more
europepmc   +1 more source

Metronomic Capecitabine Triggers Ferroptosis in Hepatocellular Carcinoma Cells Through Inhibition of TYMS

Cancer Medicine, Volume 15, Issue 5, May 2026.
In the syngeneic tumor mouse model, capecitabine inhibits TYMS by metabolizing to 5‐fluorouracil in vivo, which leads to the activation of intracellular NOX. The massive release of ROS leads to the accumulation of ferrous ions in mitochondria, and the imbalance of intracellular oxidative stress and the accumulation of ferrous ions cause ferroptosis of ...
Ruining Yang, Yuan Chang, Zhan Feng, Jiaowen Yang, Qian Sun, Hao Wang, Dejun Kong, Jinliang Duan, Shaofeng Chen, Lei Cao, Jiashu Ren, Sei Yoshida, Zhenglu Wang, Hong Zheng   +13 more
wiley   +1 more source

Coupling Liquid Chromatography to Orbitrap Isotope Ratio Mass Spectrometry: Overcoming Isotope Effects of Chromatography and Amount-Dependency by Peak Homogenization. [PDF]

Anal Chem
Canavan A, Prechtl L, Al-Ghoul H, Kuhlbusch N, Erhardt AM, Elsner M.   +5 more
europepmc   +1 more source

Cleaning Matters: Impact of Surface Treatment Methods on Solid‐State Nanopore Noise for High Frequency Recording

Chemistry–Methods, Volume 6, Issue 5, May 2026.
The impact of different cleaning strategies on the noise spectrum of solid state nanopores was evaluated. Noise reduction is a key challenge in solid‐state nanopore experiments, as it directly limits signal resolution and the detectability of translocation events.
Wesley Pietsch, Marc Safferthal, Niklas Geue, Artur Uzdenov, Michael Götze, Kevin Pagel   +5 more
wiley   +1 more source

Analysis of 13C Enrichment of Vitamin A in Biological Samples by Gas Chromatography-Combustion-Isotope Ratio Mass Spectrometry. [PDF]

J Vis Exp
Gannon BM, Davis CR, Chen H, Tanumihardjo SA.   +3 more
europepmc   +1 more source

Evaluation of precision of hydrogen isotopic composition determinations by EA-IRMS, GC-IRMS and Py-GC-IRMS

Nafta-Gaz, 2020
Marek Janiga, Małgorzata Kania
openaire   +1 more source

High‐Rate Electrosynthesis of Hydrogen Peroxide in Neutral Electrolytes Enabled by Biomass‐Derived Porous Carbon

Carbon Neutralization, Volume 5, Issue 3, May 2026.
Using soybeans as a sustainable precursor, a N, P, O co‐doped porous carbon (NPODC‐600) was synthesized. NPODC‐600 exhibited exceptional electrocatalytic performance in neutral media, achieving a H2O2 production rate of 8089 mg L–1 h–1 with a Faradaic efficiency of 93.90%. More importantly, in a solid‐state device, a high‐concentration H2O2 solution (> 
Yangkai Li, Xinxin Zhang, Xinyu Wang, Jingning Wu, Jian Zhang, Dazhi Yao, Minna Guo, Jitraporn Vongsvivut, Jun Lv, Wangqiang Shen   +9 more
wiley   +1 more source

Stable Carbon Isotope Analysis of Perfluorooctanoic Acid (PFOA) by Microflow-High Pressure Liquid Chromatography-Orbitrap Mass Spectrometry. [PDF]

Rapid Commun Mass Spectrom
Wojtal PK, Davidheiser-Kroll B, Lane CS, Mead RN.   +3 more
europepmc   +1 more source