Results 1 to 10 of about 102,497 (301)

QTOF and Orbitrap Technologies in Modern Pesticide Analysis: Applications in Residue Detection and Degradation Pathway Elucidation [PDF]

Journal of Analytical Methods in Chemistry
QTOF and Orbitrap techniques, as advanced mass spectrometry tools, show great potential in the field of pesticide residue analysis and degradation product identification.
Ruilong Li, Liu Min, Kaili Gao, Liqun Zhong, Xingang Meng, Yue Cheng   +5 more
doaj   +2 more sources

Modulating pressure in the Orbitrap improves sensitivity and mass resolution in charge detection mass spectrometry [PDF]

Nature Communications
Native mass spectrometry has become a key method for studying macromolecular assemblies, providing insights into structures, stoichiometries, and binding interactions. A key aspect for the transmission of electrospray-generated bioparticles into the mass
Eduard H.T.M. Ebberink, Elena Giaretta, Arjan Barendregt, Jan Fiala, Victor C. Yin, Tobias P. Wörner, Kyle L. Fort, Alexander A. Makarov, Albert. J. R. Heck   +8 more
doaj   +2 more sources

Metabolomics Benefits from Orbitrap GC–MS—Comparison of Low- and High-Resolution GC–MS

Metabolites, 2020
The development of improved mass spectrometers and supporting computational tools is expected to enable the rapid annotation of whole metabolomes. Essential for the progress is the identification of strengths and weaknesses of novel instrumentation in ...
Daniel Stettin, Remington X Poulin, Georg Pohnert   +2 more
exaly   +3 more sources

Characterization of Antioxidant Constituents and Geographical Differentiation of Polygonum multiflorum Thunb. Leaves Using 2D-LC-ECD and UHPLC-Orbitrap-MS/MS [PDF]

Antioxidants
This study established an activity-oriented analysis method based on offline two-dimensional liquid chromatography–electrochemical detection (2D-LC-ECD) combined with ultra-high-performance liquid chromatography–Orbitrap-MS/MS (UHPLC-Orbitrap-MS/MS ...
Zhengyan Tan, Pei Xu, Dan Wang, Zongna Han, Huaying Chen, Qianqian Zhu, Yang Yang, Wei Pan, Piao Wang, Rongxiang Chen   +9 more
doaj   +2 more sources

UHPLC-Orbitrap-MS Tentative Identification of 51 Oleraceins (Cyclo-Dopa Amides) in Portulaca oleracea L. Cluster Analysis and MS² Filtering by Mass Difference

Plants, 2021
Oleraceins are a class of indoline amide glycosides found in Portulaca oleracea L. (Portulacaceae), or purslane. These compounds are characterized by 5,6-dihydroxyindoline-2-carboxylic acid N-acylated with cinnamic acid derivatives, and many are ...
Yulian Voynikov, Paraskev Nedialkov, Reneta Gevrenova, Dimitrina Zheleva-Dimitrova, Vessela Balabanova, Ivan Dimitrov   +5 more
doaj   +1 more source

Characterization of protein isoform diversity in human umbilical vein endothelial cells via long-read proteogenomics

RNA Biology, 2022
Endothelial cells (ECs) comprise the lumenal lining of all blood vessels and are critical for the functioning of the cardiovascular system. Their phenotypes can be modulated by alternative splicing of RNA to produce distinct protein isoforms.
Madison M. Mehlferber, Erin D. Jeffery, Jamie Saquing, Ben T. Jordan, Leon Sheynkman, Mayank Murali, Gael Genet, Bipul R. Acharya, Karen K. Hirschi, Gloria M. Sheynkman   +9 more
doaj   +1 more source

Characterization of Natural and Alkaline-Oxidized Proanthocyanidins in Plant Extracts by Ultrahigh-Resolution UHPLC-MS/MS

Molecules, 2021
In this study, we analyzed the proanthocyanidin (PA) composition of 55 plant extracts before and after alkaline oxidation by ultrahigh-resolution UHPLC-MS/MS.
Maarit Karonen, Iqbal Bin Imran, Marica T. Engström, Juha-Pekka Salminen   +3 more
doaj   +1 more source

Characterization of Ikaria Heather Honey by Untargeted Ultrahigh-Performance Liquid Chromatography-High Resolution Mass Spectrometry Metabolomics and Melissopalynological Analysis

Frontiers in Chemistry, 2022
Honey represents a valuable food commodity, known since ancient times for its delicate taste and health benefits due to its specific compositional characteristics, mainly the phenolic compound content.
Konstantinos M. Kasiotis, Eirini Baira, Styliani Iosifidou, Kyriaki Bergele, Electra Manea-Karga, Ioannis Theologidis, Theodora Barmpouni, Despina Tsipi, Kyriaki Machera   +8 more
doaj   +1 more source

Mineral and Antioxidant Attributes of Petroselinum crispum at Different Stages of Ontogeny: Microgreens vs. Baby Greens

Agronomy, 2021
Parsley is an aromatic herb native to the Mediterranean region and treasured for its phytochemical profile and bioactive properties. Developmental stage at harvest is a factor that modulates the nutritional quality of vegetables, including young greens ...
Christophe El-Nakhel, Antonio Pannico, Giulia Graziani, Maria Giordano, Marios C. Kyriacou, Alberto Ritieni, Stefania De Pascale, Youssef Rouphael   +7 more
doaj   +1 more source

Identification of New Psychoactive Tryptamines 4-OH-MET and 4-AcO-DMT Using High Resolution Mass Spectrometry and Nuclear Magnetic Resonance Spectroscopy [PDF]

Fayixue Zazhi, 2021
Objective To detect the uncontrolled new psychoactive tryptamines involved in drug-related cases with high resolution mass spectrometry and nuclear magnetic resonance spectroscopy.
DING Ke-ran, NI Chun-fang, HE Si-yang, et al.
doaj   +1 more source