Mass spectrometry

Tham khảo sách 'tandem mass spectrometry – applications and principles edited by jeevan k. prasain', y tế - sức khoẻ, y học thường thức phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

788p donghanhmuathi 04-05-2013 53 2   Download

Batch grown cultures of Rhodococcus ruber from different growth phases and continuous grown cultures from carbon, phosphate and magnesium limitation were analysed by pyrolyis mass spectrometry (PyMS).

9p caplock2711 19-02-2019 13 0   Download

Thirty-eight alkalitolerant-mesophilic Streptomyces, defined by Saddler in his numerical taxonomic study, were evaluated by gas chromotography and pyrolysis mass spectrometry. Group I Streptomyces sp. AK409 and group II Streptomyces sp. AK029 selected duplicated strains were clustered in their own groups.

13p caplock2711 19-02-2019 11 0   Download

Isotopic analyses of plutonium and low-enriched uranium mixtures with particle sizes of 0.6e3.3 mm were performed using thermal ionization mass spectrometry with a continuous heating method to verify its effectiveness for the accurate analysis of minor isotopes without sample pretreatment. The mixed particles used in this study were prepared from a mixed solution of plutonium (SRM 947) and uranium (U010, 235U 1% enriched) reference materials.

5p minhxaminhyeu3 25-06-2019 10 0   Download

This study aims to demonstrate the performance of the inductively coupled plasma mass spectrometry (ICP-MS) following hot plate heating digestion method for marine fauna samples. About 100 to 200 mg of lobster hepatopancreas certified reference materials (CRMs; TORT-3 from National Research Council Canada) in each sample was processed the hot plate heating digestion procedure before analyzing 12 trace metals (Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Cd, Hg and Pb) by ICP-MS.

7p viengland2711 23-07-2019 6 0   Download

The determination of 10B/11B isotope ratio and boron concentration in various water samples using isotope dilution technique with inductively coupled plasma mass spectrometry (ICPMS) was studied.

9p vineptune2711 04-11-2019 6 0   Download

Matrix-Assisted Laser Desorption Ionization Time-Of-Flight Mass Spectrometry (MALDI-TOF MS) has become one of the most popular methods for the rapid, cost-effective and accurate classification and characterization of cultivable microorganisms. Due to its simple sample preparation and short measurement time, MALDI-TOF MS is an excellent choice for the high-throughput study of microbial isolates from rhizospheres or plants grown under diverse environmental conditions.

6p caygaocaolon1 13-11-2019 6 0   Download

In the present study, orthosulfamuron residues were extracted from fatty (unpolished) rice and rice straw using a modified QuEChERS method and analyzed using liquid chromatography– tandem mass spectrometry. The matrix-matched calibration was linear over the concentration ranges of 0.01–2.0 mg/kg with determination coefficient (R2 ) P 0.997.

6p trinhthamhodang1 16-11-2019 10 0   Download

Polycyclic aromatic hydrocarbons (PAHs) are chemical compounds that contain aromatic rings and do not contain heteroaryl or substituted groups. PAHs are found in petroleum, coal, and plastics; Moreover, PAHs are also found in foods, especially in cooked or grilled meats. These compounds are pollutants and identified as carcinogenic, mutagenic and teratogenic in humans. The goal of this paper was to develop a process to analyze the content of 16 common PAHs in grilled pork by mass spectrometry (GC-MS) using standard internal substances.

10p camtucau99 20-11-2019 9 0   Download

Coscinium fenestratum (Gaertn.) Colebr, commonly called as daruharidra which belongs to Menispermaceae family is rich with bioactive secondary metabolites that might signify valuable leads in the production of new pharmaceutical agents. The metabolite accumulation in the plants varies with the environmental factors, expression level of enzymes, climatic conditions etc. To evaluate the difference of metabolite in the cultivated vine, the sample was analysed by High performance Liquid Chromatography-Mass Spectrometry (HPLC-MS).

8p nguaconbaynhay1 04-12-2019 8 0   Download

A method based on ultra-high performance liquid chromatography coupled with tandem mass spectrometry (UPLC/MS/MS) was developed for simple and rapid determination of the residues of Auramine O in animal feedstuffs.

6p vilisbon2711 02-01-2020 10 0   Download

A gas chromatography–mass spectrometry (GC–MS) method was validated for the determination of 16 polycyclic aromatic hydrocarbons (PAHs) from the FDA list of 93 harmful or potentially harmful constituents of mainstream cigarette smoke (MCS).

13p vijiraiya2711 27-05-2020 6 0   Download

A gas chromatography mass spectrometry (GCMS) method for the determination of diclofenac in human plasma has been developed and validated.

10p vijiraiya2711 27-05-2020 8 0   Download

Mass spectrometry (MS) uses mass-to-charge ratios of measured particles to decode the identities and quantities of molecules in a sample. Interpretation of raw MS depends upon data processing algorithms that render it human-interpretable.

10p vicolorado2711 22-10-2020 8 0   Download

Mass spectrometry (MS) has become a promising analytical technique to acquire proteomics information for the characterization of biological samples. Nevertheless, most studies focus on the final proteins identified through a suite of algorithms by using partial MS spectra to compare with the sequence database, while the pattern recognition and classifcation of raw mass-spectrometric data remain unresolved.

15p vicolorado2711 22-10-2020 9 0   Download

Imaging mass spectrometry (imaging MS) is an enabling technology for spatial metabolomics of tissue sections with rapidly growing areas of applications in biology and medicine. However, imaging MS data is polluted with off-sample ions caused by sample preparation, particularly by the MALDI (matrix-assisted laser desorption/ionization) matrix application.

11p vicolorado2711 22-10-2020 5 0   Download

Mass Spectrometry (MS) is a widely used technique in biology research, and has become key in proteomics and metabolomics analyses. As a result, the amount of MS data has significantly increased in recent years. For example, the MS repository MassIVE contains more than 123TB of data.

10p vijisoo2711 27-10-2020 5 0   Download

In the field of biomarker validation with mass spectrometry, controlling the technical variability is a critical issue. In selected reaction monitoring (SRM) measurements, this issue provides the opportunity of using variance component analysis to distinguish various sources of variability.

12p viconnecticut2711 28-10-2020 8 0   Download

Despite the ubiquity of mass spectrometry (MS), data processing tools can be surprisingly limited. To date, there is no stand-alone, cross-platform 3-D visualizer for MS data. Available visualization toolkits require large libraries with multiple dependencies and are not well suited for custom MS data processing modules, such as MS storage systems or data processing algorithms.

7p viconnecticut2711 29-10-2020 3 0   Download

Metabolomics offers a unique integrative perspective for health research, reflecting genetic and environmental contributions to disease-related phenotypes. Identifying robust associations in population-based or large-scale clinical studies demands large numbers of subjects and therefore sample batching for gas-chromatography/ mass spectrometry (GC/MS) non-targeted assays.

17p vioklahoma2711 19-11-2020 7 0   Download