[PDF] Top 20 Application of electron ionization mass spectrometry for mulungu alkaloid analysis.
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Application of electron ionization mass spectrometry for mulungu alkaloid analysis.
... APPLICATION OF ELECTRON IONIZATION MASS SPECTROMETRY FOR MULUNGU ALKALOID ...barks of E. verna from a commercial producer and analyzed the alkaloid ... See full document
5
Elemental analysis of aerosol organic nitrates with electron ionization high-resolution mass spectrometry
... factor of ≈10 7 . The resulting focused beam of particles with aerodynamic diame- ters ≈30–1000 nm is impacted on a heated surface (≈600 ◦ C) where the non-refractory component of the aerosol is ... See full document
10
Characterization of proanthocyanidins from Parkia biglobosa (Jacq.) G. Don. (Fabaceae) by flow injection analysis - Electrospray ionization ion trap tandem mass spectrometry and liquid chromatography/electrospray ionization mass spectrometry
... class of natural phenolic compounds after lignin ...class of proanthocyanidins, which are oligomers and polymers of (epi)catechin subunits; prodelphinidins, which are made up of ... See full document
18
Electrospray ionization mass spectrometry screening of piperidine alkaloids from Senna spectabilis (Fabaceae) extracts: Fast identification of new constituents and co-metabolites
... structures of all piperidine alkaloids, which were identified in this study, accurate-mass measurements were performed (Table ...ions of m/z 145 (10, 11) and m/z 177 (12, 13) corroborate the presence ... See full document
8
Chemotaxonomic Fingerprinting of Chilean Lichens Through Maldi and Electrospray Ionization Mass Spectrometry
... achievable mass range, allowing measurement of metabolites, lipids, peptides, proteins, etc on the same instrument (Krishnamurthy 1996; Vaidyanathan et ...Analyses of samples without any ... See full document
10
Non-volatile analysis in fruits by laser resonant ionization spectrometry: application to resveratrol (3,5,4
... probing of trans-resveratrol in complex samples (specially plants and fruits) has been ...First of all, laser de- sorption was shown to be a convenient method to solve one of the long-standing needs ... See full document
5
J. Braz. Chem. Soc. vol.28 número5
... range of biological activities such as antiviral, anticancer, acetylcholinesterase inhibition, antimalarial, among ...others. Mass spectrometry (MS) studies based on capillary gas chromatography ... See full document
12
Time-of-Flight Secondary Ion Mass Spectrometry: New application for urinary stones analysis
... number of mechanisms. Loss or gain of an electron to form an odd electron molecular radical ions M + or M - , polar molecules may undergo acid base reaction to form protonated [M+H] + or ... See full document
150
Elemental analysis of aerosol organic nitrates with electron ionization high-resolution mass spectrometry
... series of organic standards to deter- mine calibrations for the calculation of O:C, H:C and N:C ratios from AMS ...because of the ability to distinguish different ... See full document
27
Gas chromatography-mass spectrometry analysis
... One of these was characterized as Pseudomonas ...rate of pigment productivity (Muthuselvam et ...concentration of the iron, which must be controlled to ensure the secretion of fluorescent ... See full document
8
Electron Impact Ionization Cross Sections and Analysis of X-ray Spectra
... rotation of the detector which sits on a third rotation table, concentric to the second crystal ...angle of the first crystal is measured with an Heidenhain ROD800 encoder installed in the vertical axis to ... See full document
123
Análise multirresíduos de pesticidas em tomate utilizando LC-MS/MS e avaliação dos...
... Na etapa de separação, identificação e quantificação dos resíduos de pesticidas em alimentos, geralmente são empregados métodos cromatográficos de análise. A cromatografia gasosa (GC) foi uma das primeiras técnicas a ... See full document
134
Aqueous-phase photooxidation of levoglucosan – a mechanistic study using aerosol time-of-flight chemical ionization mass spectrometry (Aerosol ToF-CIMS)
... decay of LG can be explained by several pathways. Heterogeneous oxidation of LG by gas-phase oxidants has been studied in the laboratory (Kessler et ...fraction of particle-phase LG can volatilize ... See full document
12
Development of nanoinjector devices for electrospray ionization - tandem mass spectrometry (ESI-MSn)
... In mass spectrometric (MS) systems with electrospray ionization (ESI), the sample can be analyzed coupled to separation systems (such as liquid chromatography or capillary electrophoresis) or simply by ... See full document
5
J. Braz. Chem. Soc. vol.23 número1
... determination of the dissociation pathways of these main antimalarial drugs should benefit their monitoring by MS techniques in pharmaceutical products and biological fluids and the proper identification ... See full document
8
Luz Catarina Neves Fernandes
... an application as the building block to design a more complex chemosensor for these three ...interaction of L with Cu(II), CN - and F - was also studied using MALDI-TOF mass spectrometry (both ... See full document
183
MALDI-TOF MS as a tool for the identification of Vibrio alginolyticus from Perna perna mussels (Linnaeus, 1758)
... 0.2mM of dNTP (ThermoScience) and 2U of Taq polymerase (Kapa) in a total reaction volume of 20µL with 20ng of the extracted ...3130xl of Applied Biosystems (Biotechnology Laboratory ... See full document
7
MALDI-TOF mass spectrometry detection of pathogens in vectors: the Borrelia crocidurae/Ornithodoros sonrai paradigm.
... piece of subtraction software, MALDI-TOF-MS allowed for the blindly identification of ...identification of the infected ...comprised of six proteins that are specifically found in ...total ... See full document
6
A time-of-flight mass spectrometer for high energy (0.5 - 1.0 keV) electron ionization of gases.
... obtendo-se desta forma, a cada pulso, uma base temporal para a medida dos tempos de vôo, com o emprego de um Conversor Tempo-Amplitude (Time to Amplitude Converter - TAC). Em outras palavras, a geração do pulso de ... See full document
5
Mass Spectrometry Analysis of Protonated Marine Natural Product Seriniquinone
... stability of the protonated compound when submitted to CID ...analyses of protonated SQ have shown that the relative intensity and number of product ions are obtained by two competitive pathways, and ... See full document
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