Article
Energy & Fuels
Mary J. Thomas, Hugh E. Jones, Diana Catalina Palacio Lozano, Remy Gavard, Shaun Carney, Mark P. Barrow
Summary: This study analyzed the asphaltene fractions of eight HFOs using FTICR MS, revealing their differing behavior. Fragmentation experiments using IRMPD on a specific mass region allowed comparison of the relative heteroatom content and degree of alkylation in the asphaltene cores and aromatic moieties.
Article
Engineering, Environmental
Junzhuo Liu, Lirong Wu, Lina Gong, Yonghong Wu, Andrew J. Tanentzap
Summary: Phototrophic biofilms play a crucial role in shaping the molecular composition and accumulation of dissolved organic matter (DOM) in periodically flooding-drying soils. They increase the abundance of labile DOM compounds and richness of molecular formulae during growth, while decreasing the relative abundance of labile components during decomposition. These findings provide insights into the potential use of phototrophic biofilms for enhancing DOM bioactivity and soil fertility in agricultural settings.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Penghui Du, Guoping Chen, Peng Zhang, Biwei Yang, Junjian Wang
Summary: This study investigates the changes in EfOM under sunlight exposure, revealing the photolysis, molecular-level composition, and chlorine reactivity of wastewater organic matter. Furthermore, sunlight exposure reduces the toxicity of disinfection byproducts.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Chemistry, Analytical
Virginia K. James, James D. Sanders, Konstantin Aizikov, Kyle L. Fort, Dmitry Grinfeld, Alexander Makarov, Jennifer S. Brodbelt
Summary: Measurement of collision cross section (CCS) is a parameter reflecting the size and shape of an ion and provides structural information beyond molecular mass alone. Previously, isolation of individual charge states was required for CCS analysis, limiting throughput. In this study, CCSs were determined from commonly available mass spectra files using an Orbitrap mass spectrometer, allowing for simultaneous estimation of CCS for multiple charge states and expanding the applicability of this method.
ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Environmental
Xianjiang Zeng, Yaxin Zheng, Xiaorui Chen, Xu Cao, Wei He, Bin Jiang, Binghua Li, Huaming Guo
Summary: This study used Fourier transform ion cyclotron resonance mass spectrometry to investigate the molecular characteristics of dissolved organic matter (DOM) in groundwater from reclaimed water and natural water recharge areas. The results showed that the groundwater from reclaimed water areas had fewer nitrogenous compounds, more sulfur-containing compounds, higher concentrations of nitrate-nitrogen, and lower pH than the groundwater from natural water recharge areas. This study also found that the intensities of common molecules in all samples were significantly correlated with water quality and fluorescent indicators, suggesting their potential for tracking the environmental impact of anthropogenic groundwater recharge.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Tingcang Hu, Min Luo, Yulin Qi, Ding He, Linying Chen, Yunping Xu, Duofu Chen
Summary: Pore water samples from Haima cold seeps sediments and non-seep reference sediments in the northern South China Sea were analyzed. The results showed that the seep sediments had higher abundance of labile DOM, indicated by protein-like DOM, H/Cwa, and MLBL%. The presence of sulfidic environment in the seep sediments led to increased S-containing formulas and biotic sulfurization, which increased DOM lability.
Article
Engineering, Environmental
Zhidan Wen, Yingxin Shang, Kaishan Song, Ge Liu, Junbin Hou, Lili Lyu, Hui Tao, Sijia Li, Chen He, Quan Shi, Ding He
Summary: The trophic state of lakes has a significant impact on the properties and concentration of dissolved organic matter (DOM). DOM in eutrophic lakes is more biologically refractory and contains compounds that are harmful to the environment. The molecular composition of DOM is positively correlated with the trophic state index. Additionally, the molecular lability of DOM varies with the season and phytoplankton community succession.
Article
Energy & Fuels
Victor R. Fonseca, Gabriely S. Folli, Lindamara M. Souza, Thieres M. C. Pereira, Guilherme S. V. Lima, Carla C. B. Viegas, Luiz S. Chinelatto, Alvaro C. Neto, Paulo R. Filgueiras, Valdemar Lacerda, Wanderson Romao
Summary: In this study, the LDI(+) technique was optimized to effectively ionize asphaltene molecules without generating artifacts like fullerenes. The APPI(+) technique was found to be less efficient in ionizing nitrogen compounds compared to LDI(+).
Article
Chemistry, Analytical
Valentina Calabrese, Isabelle Schmitz-Afonso, Wassila Riah-Anglet, Isabelle Trinsoutrot-Gattin, Barbara Pawlak, Carlos Afonso
Summary: In this study, the performance of direct introduction electrospray ionization (ESI) and matrix assisted laser desorption ionization (MALDI) coupled with Fourier-Transform ion cyclotron resonance mass spectrometry (FTICR MS) for analyzing root exudates (RE) was systematically evaluated. MALDI showed better salt tolerance and ionization efficiency at high salinity, making it suitable for analyzing metabolites in complex matrices. The study also demonstrated the complementarity of the two ionization sources and the advantage of MALDI in detecting metabolites suffering from matrix effects in ESI mode.
Article
Chemistry, Analytical
Qingyu Zhang, Ke Xu, Yu Zhang, Jing Han, Wenwen Sui, Haotian Zhang, Maomao Yu, Yichen Tong, Sijie Wang, Fei Han
Summary: A method combining high-performance liquid chromatography and Fourier transform-ion cyclotron resonance mass spectrometry was developed for quality control of Semen Hoveniae. Establishment of chromatographic fingerprint and identification of qualitative markers were achieved through chemometric methods. Dihydromyricetin and dihydroquercetin were found to be the main qualitative markers indicating the quality difference in Semen Hoveniae, with variances in content observed among different batch samples.
JOURNAL OF SEPARATION SCIENCE
(2021)
Article
Biochemical Research Methods
Konstantin O. Nagornov, Anton N. Kozhinov, Natalia Gasilova, Laure Menin, Yury O. Tsybin
Summary: This paper highlights the importance of isotopic beat patterns in the accurate interpretation of FTMS data, introduces a new FTMS data simulation tool for mAbs analysis, and evaluates the isotopic beat characteristics in typical instruments for mAbs analysis. The results demonstrate a significant impact of isotopic beat patterns on the analytical characteristics of mass spectra.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2022)
Article
Engineering, Environmental
Ding He, Penghui Li, Chen He, Yuntao Wang, Quan Shi
Summary: This study found that eutrophication and reed marshes significantly influence the concentration and composition of dissolved organic matter (DOM) in coastal carbon cycling. The Daliao River, characterized by high eutrophication, exhibited higher levels of protein-like fluorescent components and stable carbon isotopes, indicating a higher content of autochthonous DOM.
Article
Engineering, Environmental
Biwei Yang, Penghui Du, Guoping Chen, Peng Zhang, Qiang Zhang, Zhongying Wang, Gan Zhang, Zongwei Cai, Junjian Wang
Summary: Researchers have found that manganese dioxide (MnO2) can oxidize organic pollutants in aquatic environments, but the presence of dissolved organic matter (DOM) can either inhibit or promote this process. The conflicting results from previous studies have now been resolved, with the type, concentration, and pH of DOM being identified as important factors in the oxidation reaction.
Article
Engineering, Environmental
Shasha Liu, Junwen Hou, Chengyu Suo, Junyi Chen, Xiaohui Liu, Rui Fu, Fengchang Wu
Summary: Dissolved organic matter (DOM) plays a crucial role in aquatic biogeochemical cycles and the global carbon cycle. This study investigates the molecular composition of DOM along a trophic gradient in 11 lakes in China. The results show that DOM from eutrophic lakes is characterized by higher molecular weight, unsaturation degree, abundance of S-containing compounds, and condensed or polycyclic aromatic compounds compared to DOM from oligotrophic lakes. In addition, nutrient input and allochthonous DOM contribute to lake eutrophication and the release of autochthonous DOM. This research provides valuable insights for future studies on DOM dynamics in eutrophic lakes.
Article
Engineering, Environmental
Bo Sun, Yongshuang Li, Manjiao Song, Rui Li, Zaixing Li, Guoqiang Zhuang, Zhihui Bai, Xuliang Zhuang
Summary: The study revealed that semi-permeable membrane-covered thermophilic compost had higher aromatization and humification of dissolved organic matter compared to conventional thermophilic composting, leading to accelerated humification process by promoting the degradation of labile DOM and the production of humus-like substances.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Biochemical Research Methods
Brenda Bakker, Rianne D. W. Vaes, Merel R. Aberle, Tessa Welbers, Thomas Hankemeier, Sander S. Rensen, Steven W. M. Olde Damink, Ron M. A. Heeren
Summary: This protocol describes how to prepare organoid samples for mass spectrometry imaging, which is a powerful analytical method for detecting a wide variety of molecules in a single experiment while retaining their spatiotemporal distribution.
Article
Biochemical Research Methods
Therese S. Hoiem, Maria K. Andersen, Marta Martin-Lorenzo, Remi Longuespee, Britt S. R. Claes, Anna Nordborg, Frederic Dewez, Benjamin Balluff, Marco Giampa, Animesh Sharma, Lars Hagen, Ron M. A. Heeren, Tone F. Bathen, Guro F. Giskeodegard, Sebastian Krossa, May-Britt Tessem
Summary: MALDI MS imaging is a powerful tool for spatial peptide detection in heterogeneous tissues, and proper sample preparation is crucial for high-quality measurements. In this study, an optimized protocol was developed for spatially resolved proteolytic peptide detection in fresh frozen prostate tissue sections using MALDI time-of-flight MSI.
Article
Multidisciplinary Sciences
Sung-Hwan Cho, Katalin Toth, Daewon Kim, Phuc H Vo, Chung-Ho Lin, Pubudu P. Handakumbura, Albert Rivas Ubach, Sterling Evans, Ljiljana Pasa-Tolic, Gary Stacey
Summary: The mevalonate pathway is crucial for cellular processes in both animals and plants. In plants, it affects growth, development, and response to stress. The interaction between mevalonate kinase and extracellular ATP receptor P2K1, with phosphorylation impacting plant metabolism, emphasizes the significance of purinergic signaling and the role of eATP in influencing plant metabolic pathways.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Jesse W. Wilson, Aivett Bilbao, Juan Wang, Yen-Chen Liao, Dusan Velickovic, Roza Wojcik, Marta Passamonti, Rui Zhao, Andrea F. G. Gargano, Vincent R. Gerbasi, Ljiljana Pasa-Tolicprime, Scott E. Baker, Mowei Zhou
Summary: SARS-CoV-2 cellular infection is mediated by heavily glycosylated spike protein. Recombinant spike protein and receptor-binding domain (RBD) play important roles in seropositivity assays and potential vaccines against viral infection. Liquid chromatography coupled to mass spectrometry is used to characterize post-translational modifications, including glycosylation. The HILIC top-down MS platform shows great potential in resolving heterogeneous glycoproteins for quality control applications.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Pierre-Maxence Vaysse, Imke Demers, Mari F. C. M. van den Hout, Wouter van de Worp, Ian G. M. Anthony, Laura W. J. Baijens, Bing I. Tan, Martin Lacko, Lauretta A. A. Vaassen, Auke van Mierlo, Ramon C. J. Langen, Ernst-Jan M. Speel, Ron M. A. Heeren, Tiffany Porta Siegel, Bernd Kremer
Summary: In this study, the application of rapid evaporative ionization mass spectrometry (REIMS) in oral cavity cancer surgery was evaluated. The results showed that REIMS classified tumor and soft tissues with high accuracy. The study also explored the importance of tissue heterogeneity assessment with complementary desorption electrospray ionization-mass spectrometry imaging (DESI-MSI) and REIMS sensitivity evaluation with cell mixtures for in vivo tissue recognition.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Britt S. R. Claes, Kasper K. Krestensen, Gargey Yagnik, Andrej Grgic, Christel Kuik, Mark J. Lim, Kenneth J. Rothschild, Michiel Vandenbosch, Ron M. A. Heeren
Summary: A novel technology called MALDIIHC was published, which combined MALDI-MSI and IHC to achieve targeted imaging of biomolecules in tissue. The utility of targeted MALDIIHC and its complementarity with untargeted on-tissue proteomics was explored using breast cancer tissue. MALDI-2 was also investigated and demonstrated to improve MALDI-IHC. The combination of multiplexed MALDI-IHC with image-guided proteomics showed great potential in studying diseases.
ANALYTICAL CHEMISTRY
(2023)
Article
Biochemical Research Methods
Kevin J. Zemaitis, Mowei Zhou, Willia M. Kew, Ljiljana Pasa-Tolic
Summary: MALDI imaging enables the profiling of proteoforms at a near-cellular level, but identifying unknowns using only intact mass information remains a challenge. Supplementary methods, such as bottom-up and/or top-down proteomics, have been used to create experimental databases for accurate mass matching. This study demonstrates the feasibility of top-down analyses of isolated MALDI protein ions using 193 nm ultraviolet photodissociation, allowing for more comprehensive characterization of proteoforms in MALDI imaging applications.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2023)
Article
Biochemical Research Methods
Kasper Krijnen, Joel D. Keelor, Sebastian Boehm, Shane R. Ellis, Claus Koester, Jens Hoehndorf, Ron M. A. Heeren, Ian G. M. Anthony
Summary: Mass spectrometry imaging (MSI) is a surface analysis technique used for biological research, and multimodal imaging combining multiple imaging modes can provide a more comprehensive view of samples. In this study, a prototype Bruker timsTOF fleX instrument was modified to include secondary ion mass spectrometry (SIMS) and secondary electron (SE) imaging capabilities while preserving matrix-assisted laser desorption/ionization (MALDI) capability. The modified instrument showed improved efficiency in multimodal imaging, allowing for easy registration of images and eliminating the need for sample transfer.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2023)
Article
Multidisciplinary Sciences
Andrej Grgic, Kasper K. Krestensen, Ron M. A. Heeren
Summary: Glycans play diverse roles in biology, and variations in N-glycosylation state within tissues have clinical diagnostic value. A protocol for MALDI MSI of N-glycans from fresh frozen tissue was developed, matching the current standard of FFPE analysis. This protocol significantly improves signal intensity and spatial resolution, enhancing the clinical application of MALDI MSI for N-glycan analysis.
SCIENTIFIC REPORTS
(2023)
Article
Biochemical Research Methods
Britt S. R. Claes, Andrew P. Bowman, Berwyck L. J. Poad, Ron M. A. Heeren, Stephen J. Blanksby, Shane R. Ellis
Summary: The biological functions of lipids highly depend on their molecular structures, specifically even small changes in structure such as different positions of unsaturation serve as critical indicators for changes in metabolism. However, conventional mass spectrometry imaging faces challenges in differentiating lipid isomers with mixture and structural complexity. Recent advances in ozone-induced dissociation coupled with matrix-assisted laser desorption/ionization have shown potential in mapping individual double-bond isomers and visualizing lipid desaturation in adjacent tissue types. This study employs a high-speed gas-phase reaction between ionized lipids and ozone to interrogate anionic glycerophospholipids isomers in biological tissues, providing valuable information on unsaturation and acyl chain composition from a single mass spectrum.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2023)
Article
Polymer Science
Lidia Molina-Millan, Aljoscha Koerber, Bryn Flinders, Berta Cillero-Pastor, Eva Cuypers, Ron M. A. Heeren
Summary: Synthetic polymers, when improperly disposed of, accumulate in the environment and pose potential health risks by degrading into micro- and nanoparticles (MNPs). Matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI MSI) can be used to study biological or toxicological changes in organisms exposed to MNPs. MALDI-2 has been found to enhance the sensitivity of polymer analysis, making it a promising tool for studying the distribution of polymers in biological systems.
Article
Microbiology
Alison J. Scott, Alexis A. Smith, Ron M. A. Heeren, Utpal Pal, Robert K. Ernst
Summary: Spatially aware de novo discovery methods play a crucial role in identifying therapeutic targets in complex interphylum interactions. This study evaluated the potential of matrix-assisted desorption/ionization mass spectrometry imaging (MALDI-MSI) as a spatial omics method to simultaneously profile an arthropod vector and a mammalian skin in a bite model. The results demonstrated the feasibility of using MSI to analyze lipids and observe lipid reorganization at the bite site in both the tick and mammalian skin.
Article
Chemistry, Analytical
Britt S. R. Claes, Kasper K. Krestensen, Gargey Yagnik, Andrej Grgic, Christel Kuik, Mark J. Lim, Kenneth J. Rothschild, Michiel Vandenbosch, Ron M. A. Heeren
Summary: A novel technique called MALDIIHC was published recently, which combines MALDI-MSI and IHC to achieve targeted imaging of biomolecules in tissue. This study explored the utility of targeted MALDIIHC and its complementarity with untargeted spatial proteomics using breast cancer tissue. The combination of multiplexed MALDI-IHC with image-guided proteomics showed great potential for disease investigation. Additionally, the effect of MALDI-2 in improving MALDI-IHC was investigated.
ANALYTICAL CHEMISTRY
(2023)
Article
Food Science & Technology
Mudita Vats, Berta Cillero-Pastor, Bryn Flinders, Eva Cuypers, Ron M. A. Heeren
Summary: This study utilized MALDI-MSI to determine the spatial distribution of flavor compounds in edible button mushrooms and optimized the sample preparation protocol and investigated the effect of heat on the distribution.
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
(2023)
Review
Chemistry, Analytical
Kasper K. Krestensen, Ron M. A. Heeren, Benjamin Balluff
Summary: Mass spectrometry imaging (MSI) has evolved from a niche technique to a widely used spatial biology tool. This review provides an overview of state-of-the-art MSI applications in both established and emerging biomedical fields, serving as a reference framework for new researchers in the field.