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Laser Desorption Ionization Mass Spectrometry For Direct Profiling And Imaging Of Small Molecules From Raw Biological Materials
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Book Synopsis Laser Desorption/ionization Mass Spectrometry for Direct Profiling and Imaging of Small Molecules from Raw Biological Materials by : Sangwon Cha
Download or read book Laser Desorption/ionization Mass Spectrometry for Direct Profiling and Imaging of Small Molecules from Raw Biological Materials written by Sangwon Cha and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Desorption/ionization Mass Spectrometry for Direct Profiling and Imaging of Small Molecules from Raw Biological Materials by :
Download or read book Laser Desorption/ionization Mass Spectrometry for Direct Profiling and Imaging of Small Molecules from Raw Biological Materials written by and published by . This book was released on 2008 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Matrix-assisted laser desorption/ionization(MALDI) mass spectrometry(MS) has been widely used for analysis of biological molecules, especially macromolecules such as proteins. However, MALDI MS has a problem in small molecule (less than 1 kDa) analysis because of the signal saturation by organic matrixes in the low mass region. In imaging MS (IMS), inhomogeneous surface formation due to the co-crystallization process by organic MALDI matrixes limits the spatial resolution of the mass spectral image. Therefore, to make laser desorption/ionization (LDI) MS more suitable for mass spectral profiling and imaging of small molecules directly from raw biological tissues, LDI MS protocols with various alternative assisting materials were developed and applied to many biological systems of interest. Colloidal graphite was used as a matrix for IMS of small molecules for the first time and methodologies for analyses of small metabolites in rat brain tissues, fruits, and plant tissues were developed. With rat brain tissues, the signal enhancement for cerebroside species by colloidal graphite was observed and images of cerebrosides were successfully generated by IMS. In addition, separation of isobaric lipid ions was performed by imaging tandem MS. Directly from Arabidopsis flowers, flavonoids were successfully profiled and heterogeneous distribution of flavonoids in petals was observed for the first time by graphite-assisted LDI(GALDI) IMS.
Download or read book Laser Desorption written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Matrix-assisted laser desorption/ionization(MALDI) mass spectrometry(MS) has been widely used for analysis of biological molecules, especially macromolecules such as proteins. However, MALDI MS has a problem in small molecule (less than 1 kDa) analysis because of the signal saturation by organic matrixes in the low mass region. In imaging MS (IMS), inhomogeneous surface formation due to the co-crystallization process by organic MALDI matrixes limits the spatial resolution of the mass spectral image. Therefore, to make laser desorption/ionization (LDI) MS more suitable for mass spectral profiling and imaging of small molecules directly from raw biological tissues, LDI MS protocols with various alternative assisting materials were developed and applied to many biological systems of interest. Colloidal graphite was used as a matrix for IMS of small molecules for the first time and methodologies for analyses of small metabolites in rat brain tissues, fruits, and plant tissues were developed. With rat brain tissues, the signal enhancement for cerebroside species by colloidal graphite was observed and images of cerebrosides were successfully generated by IMS. In addition, separation of isobaric lipid ions was performed by imaging tandem MS. Directly from Arabidopsis flowers, flavonoids were successfully profiled and heterogeneous distribution of flavonoids in petals was observed for the first time by graphite-assisted LDI(GALDI) IMS.
Book Synopsis Studies on Surface-Assisted Laser Desorption/Ionization and Its Analytical Application in Imaging Mass Spectrometry by : Ho-Wai Tang
Download or read book Studies on Surface-Assisted Laser Desorption/Ionization and Its Analytical Application in Imaging Mass Spectrometry written by Ho-Wai Tang and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Studies on surface-assisted laser desorption/ionization and its analytical application in imaging mass spectrometry" by Ho-wai, Tang, 鄧浩維, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Surface-Assisted Laser Desorption/Ionization Mass Spectrometry (SALDI-MS) is an analytical technique enabling direct chemical analysis of solid samples. Analytes could be desorbed/ionized upon nitrogen laser irradiation from a SALDI substrate-coated sample, then analyzed by MS. The substrate is involved in the transfer of laser energy to the analytes, and eventually assists the desorption/ionization of analytes. The analytical performance of SALDI-MS, such as detection sensitivity, is dependent on different parameters of the substrate, such as size, morphology and form. In this thesis, the effects of several substrate parameters on the SALDI process were investigated. SALDI-MS based Imaging Mass Spectrometry (IMS) method was also developed using efficient SALDI substrate identified in the fundamental studies. IMS is a chemical-specific mapping technique which allows parallel mapping of multiple analytes in solid samples. The desorption mechanism of SALDI is investigated using two groups of substrate, the carbon allotropes and the noble metal nanoparticles. Ion desorption efficiency and internal energy transfer were probed and correlated in carbon-based SALDI. It was found that the ion desorption efficiency and internal energy transfer was in opposite order. Substrate that transferred more internal energy to ions did not show higher ion desorption efficiency. This result could not be explained by the Thermal Desorption model which was a generally believed mechanism of the SALDI desorption process. A non-thermal model, the Phase Transition model is proposed to account for the SALDI desorption process. The Phase Transition model suggests that the substrate is melted/ restructured upon laser irradiation, and this will assist ion desorption. The Phase Transition model is supported by the morphological change of carbon substrates after SALDI and high initial velocity of ions desorbed by carbon-based SALDI (> 1,000 ms-1). SALDI-MS is useful for small molecule analysis due to the relatively clean background in the low mass region. SALDI-IMS is developed and applied to the imaging of spatial distribution of small molecules in forensic and biological samples. Gold nanoparticles (AuNPs) was selected as the substrate from several other noble metal NPs. A solvent-free method, argon ion sputtering, was employed for coating AuNPs on sample surface prior to SALDI-IMS analysis. Fine details of the samples, such as the fine pattern of latent fingerprints and handwriting on questioned documents can be preserved and imaged reliably by avoiding the use of solvent. Fatty acids, drugs and ink components can be imaged in forensic samples including latent fingerprints, banknotes and checks. The solvent-free SALDI-IMS method was also applied to image the distribution of metabolites in intact animal tissues. Spatial distributions of neurotransmitters, nucleobases and fatty acids can be imaged from mouse brain and tumor tissue sections. DOI: 10.5353/th_b4714555 Subjects: Mass spectrometry Imaging systems
Book Synopsis Advances in MALDI and Laser-Induced Soft Ionization Mass Spectrometry by : Rainer Cramer
Download or read book Advances in MALDI and Laser-Induced Soft Ionization Mass Spectrometry written by Rainer Cramer and published by Springer. This book was released on 2015-11-09 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the state-of-the-art of modern MALDI (matrix-assisted laser desorption/ionization) and its applications. New applications and improvements in the MALDI field such as biotyping, clinical diagnosis, forensic imaging, and ESI-like ion production are covered in detail. Additional topics include MS imaging, biotyping/speciation and large-scale, high-speed MS sample profiling, new methods based on MALDI or MALDI-like sample preparations, and the advantages of ESI to MALDI MS analysis. This is an ideal book for graduate students and researchers in the field of bioanalytical sciences. This book also: • Showcases new techniques and applications in MALDI MS • Demonstrates how MALDI is preferable to ESI (electrospray ionization) • Illustrates the pros and cons associated with biomarker discovery studies in clinical proteomics and the various application areas, such as cancer proteomics
Book Synopsis Fundamental Study and Method Development for Surface-based Laser Desorption Ionization Imaging Mass Spectrometry by :
Download or read book Fundamental Study and Method Development for Surface-based Laser Desorption Ionization Imaging Mass Spectrometry written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: By providing both the chemical identity and the spatial organization of each component in biological samples, Imaging Mass Spectrometry (IMS) becomes an emerging tool in clinic and pharmacological study. Most work in IMS has been focused on protein and peptide mapping in biological samples to take advantage of effective analyte ionization in MALDI-MS, and also partially due to the limitation of MALDI-MS in small molecule detection. The focus of my research is to develop novel tools to image spatial distribution of small molecules in biological samples. A surface-based mass spectrometric imaging method, i.e. Desorption/Ionization on Silicon (DIOS), was used for biological surface analysis in the concept-proof investigation. More over, possible proton transferring pathways and impact of local chemical environment have been systematically investigated in the fundamental understanding of ionization mechanism of SALDI-MS. Based on the finding on the SALDI mechanism, a hybrid ionization approach, ME-SALDI has been developed by combing the strength of the conventional MALDI matrix and SALDI, where the improved detection sensitivity with reduced matrix-analyte interference and the improved imaging capability through analysis of mouse brain and heart sections has been demonstrated. In addition, the impact of vacuum stability of matrix in ME-SALDI-IMS applications has been examined. A solvent free, homogenous and reproducible sublimation method has been developed for ionic matrix in ME-SALDI, by which improved vacuum stability and MS detection have been achieved. Furthermore, a new generation of meso-porous oxide substrate was developed as a novel ME-SALDI substrate with a superior storage stability, extended detectable mass range and robust substrate preparation.
Book Synopsis MALDI Mass Spectrometry Imaging by : Tiffany Porta Siegel
Download or read book MALDI Mass Spectrometry Imaging written by Tiffany Porta Siegel and published by Royal Society of Chemistry. This book was released on 2021-11-23 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers, in a single resource, knowledge about matrix-assisted laser desorption ionisation (MALDI) mass spectrometry imaging. It includes fundamentals in the MALDI ionisation process, different source geometries and capabilities, detection systems and the latest research and applications in the range of –omics area as well as other broader areas. Chapters will touch on dedicated sample preparation protocols specific for the class of compounds of interest, instrumentation used with strengths and current limitations, strategies for structural analysis and identification and applications. It will be a welcomed addition to the literature in this fast-moving field and provide a guide to new innovations and applications especially in metabolomics and proteomics. With contributions from leading experts, this book will be an authoritative guide to this method. Aimed at postgraduate and professional researchers, in academia and in the industrial market where it has direct application to clinical research. It will be a supporting volume for those just entering the field as well as experienced practitioners.
Book Synopsis Direct Analysis of Samples by Mass Spectrometry by :
Download or read book Direct Analysis of Samples by Mass Spectrometry written by and published by . This book was released on 2009 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mass spectrometric methods that are able to analyze solid samples or biological materials with little or no sample preparation are invaluable to science as well as society. Fundamental research that has discovered experimental and instrumental parameters that inhibit fractionation effects that occur during the quantification of elemental species in solid samples by laser ablation inductively coupled plasma mass spectrometry is described. Research that determines the effectiveness of novel laser desorption/ionization mass spectrometric methods for the molecular analysis of biological tissues at atmospheric pressure and at high spatial resolution is also described. A spatial resolution is achieved that is able to analyze samples at the single cell level.
Book Synopsis Imaging Small Molecules in Tissue by Matrix-assisted Laser Desorption/ionization Tandem Mass Spectrometry by : Timothy J. Garrett
Download or read book Imaging Small Molecules in Tissue by Matrix-assisted Laser Desorption/ionization Tandem Mass Spectrometry written by Timothy J. Garrett and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Eleven individual phosphatidylcholines and sphingomyelins were identified by MS2 with fragment ions that allow for the identification of the fatty acyl chains and their position on the glycerol backbone. The use of non-conductive and conductive glass microscope slides in connection to ion trap mass analysis was evaluated, and results showed that equivalent data could be obtained on either surface. An artistic airbrush was employed to effectively coat the matrix compound onto tissue sections without the deleterious effects of analyte migration.
Book Synopsis Small Molecule Matrix-free Laser Desorption/ionization Mass Spectrometry by :
Download or read book Small Molecule Matrix-free Laser Desorption/ionization Mass Spectrometry written by and published by . This book was released on 2006 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modified Si wafers and nanoparticles (5-50 nm) have been developed and explored to assist laser desorption ionization mass spectrometry (LDI-MS) for small molecule analysis. DIOS (desorption/ionization on silicon) plates were prepared according to published protocols. DIOS was tested and compared with the optimized silicon nanoparticles derivatized by penterfluorophenylchlorosilane (PFP). SPALDI (Si nanoparticle assisted LDI) requires less laser flux than common MALDI and DIOS thus provides significant less background and higher ionization efficiency. It has higher surface homogeneity, relative salt tolerance and high selectivity which may origin from analyte dependent pre-charging. Surface characterization has been investigated. And different analytes including drugs, peptides, pesticides and acids in both biological and environmental samples have been applied by positive or negative ionization mode. Detection limits, down to the low femtomole per microliter levels have been achieved for propafenone and verapamil. SPALDI is an easily applicable practical tool at a potential low cost.
Book Synopsis Mass Spectrometry Imaging of Small Molecules by : Young-Jin Lee
Download or read book Mass Spectrometry Imaging of Small Molecules written by Young-Jin Lee and published by Humana. This book was released on 2022-12-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents updated methods and new developments in the field of mass spectrometry imaging. Chapters guide readers through four parts covering imaging, software, data analysis, new instrumentation, and new methodological approaches. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and cutting-edge, Mass Spectrometry Imaging of Small Molecules aims to be a useful practical guide to researchers to help further their study in this field.
Download or read book Neuroproteomics written by Oscar Alzate and published by CRC Press. This book was released on 2009-10-26 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this, the post-genomic age, our knowledge of biological systems continues to expand and progress. As the research becomes more focused, so too does the data. Genomic research progresses to proteomics and brings us to a deeper understanding of the behavior and function of protein clusters. And now proteomics gives way to neuroproteomics as we beg
Book Synopsis Laser Desorption Ionization Mass Spectrometry Based on Nanophotonic Structure: From Material Design to Mechanistic Understanding by : Moon-Ju Kim
Download or read book Laser Desorption Ionization Mass Spectrometry Based on Nanophotonic Structure: From Material Design to Mechanistic Understanding written by Moon-Ju Kim and published by Springer Nature. This book was released on 2023-11-11 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents innovative laser desorption ionization (LDI)-active nanophotonic structures for addressing the challenges that matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) is currently facing and for enhancing LDI efficiency. It presents a variety of cutting-edge nanophotonic structures to satisfy the mass-analytical needs of sensitivity, reproducibility, and quantification. As opposed to the commercialized, conventional organic matrix used in MALDI-MS, these nanostructures are validated to be highly effective in detecting small metabolites and drugs, highlighting their considerable potential in the mass spectrometry field. It also systematically elucidates fundamental LDI processes in terms of the photo-thermal, electronic, and structural characteristics of nanophotonic structures, offering mechanistic knowledge of LDI-MS. Even though LDI-MS performance is heavily influenced by a number of nanostructure parameters, relatively little is known about the LDI processes associated with those characteristics. An in-depth understanding of nanostructure characteristics and LDI mechanisms thus paves the way for more effective, rational design and development of nanostructures with improved LDI capabilities. Further, with a focus on multiple cascades in nanostructure functions in response to laser pulse stimuli, this book provides detailed, step-by-step procedures to design and construct a nanophotonic, LDI-active platform, which may serve as a roadmap for graduate students in the field of mass spectrometry. Readers, including graduate students, researchers, and experts working in the related areas of mass spectrometry, nanophotonics, and material science and material engineering, will find a wealth of useful information in this book.
Download or read book Seeds written by J. Derek Bewley and published by Springer Science & Business Media. This book was released on 2012-10-23 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This updated and much revised third edition of Seeds: Physiology of Development, Germination and Dormancy provides a thorough overview of seed biology and incorporates much of the progress that has been made during the past fifteen years. With an emphasis on placing information in the context of the seed, this new edition includes recent advances in the areas of molecular biology of development and germination, as well as fresh insights into dormancy, ecophysiology, desiccation tolerance, and longevity. Authored by preeminent authorities in the field, this book is an invaluable resource for researchers, teachers, and students interested in the diverse aspects of seed biology.
Book Synopsis Neurotransmitters and Neuromodulators by : Oliver von Bohlen und Halbach
Download or read book Neurotransmitters and Neuromodulators written by Oliver von Bohlen und Halbach and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete update of the highly acclaimed handbook with data on all neurotransmitters and the majority of neuromodulators. The coverage is now even more comprehensive, with 15% more entries on neuropeptides, "classic" neurotransmitters and related substances in a clear, alphabetical format. The methodological section has been expanded by 50% and now includes color figures, plus new chapters on genomics, proteomics, databases, microarrays, MALDI-TOF, neutrophins, FGF, endocannabinoids and neuroimaging. The text provides clearly structured information on the biosynthesis and degradation, localization, receptors, signal transduction pathways, and biological effects in the central nervous system, with all substances uniformly treated for an easy comparison of data. Furthermore, introductory chapters on receptors, transporters, and the blood-brain barrier make this an indispensable tool for researchers, teachers, and advanced students, as well as a must-have for every neuroscientist.
Book Synopsis Fundamental Studies of Matrix-assisted Laser Desorption/ionization Time-of-flight Mass Spectrometry (MALDI-TOF/MS) and Its Applications to the Analysis of Biological Materials by : Yongdong Zhu
Download or read book Fundamental Studies of Matrix-assisted Laser Desorption/ionization Time-of-flight Mass Spectrometry (MALDI-TOF/MS) and Its Applications to the Analysis of Biological Materials written by Yongdong Zhu and published by . This book was released on 1999 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct Analysis of Samples by Mass Spectrometry by : David C. Perdian
Download or read book Direct Analysis of Samples by Mass Spectrometry written by David C. Perdian and published by . This book was released on 2009 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
