high resolution gas chromatography olfactometry and mass spectrometry

... Karasek, F W., and Clement, R E Basic Gas Chromatography- Mass Spectrome- try—Principles and Techniques New York: Elsevier, 1991 Linskens, H F., and Jackson, J F., Eds Gas Chromatography/ Mass Spectrometry ... Glish, G L., and McLuckey, S A Mass Spectrometry: Techniques and Applications of Tandem Mass Spectrometry New York: VCH Publishers, 1988 7 For further reading on chemical ionization mass spectrometry, ... prominent high- mass ion in the spectrum If two high- mass peaks separated by 15 mass units are observed, then the highest -mass peak is usually the molecular weight of the TMS derivative If a high- mass

Ngày tải lên: 06/10/2016, 09:25

... Sweeping-micellar electrokinetic chromatography with tandem mass spectrometry as an alternative methodology to determine neonicotinoid and boscalid residues in pollen and honeybee samples Laura Carbonell-Rozas ... electrokinetic chromatography coupled with tandem mass spectrometry (MEKC-MS/MS) for the simultaneous determination of nine neonicotinoids (NNIs) together with the fungicide boscalid in pollen and honeybee ... stable electrospray and good sensitivity Thus, different parameters affecting the electrospray such as composition and flow of the sheath-liquid, dry gas flow and temperature, and nebulizer pressure

Ngày tải lên: 25/12/2022, 02:55

... metabolic flux networks using stable isotopes and mass spectrometry Maria I Klapa*, Juan-Carlos Aon† and Gregory Stephanopoulos Department of Chemical Engineering, Massachusetts Institute of Technology, ... from mass isotopomer measurements of biomass hydrolysates, while thoroughly addressing the issues of measurement accuracy, flux observability and data reconciliation The analysis enabled the resolution ... synthase not carry flux at these experimental conditions and identified a high futile cycle between oxaloacetate and pyruvate, indicating a highly active in vivo oxaloacetate decarboxylase Both results

Ngày tải lên: 08/03/2014, 08:20

... cho cấu tử sản phẩm, đồng thời định tính định lượng xác thành phần hóa học tạo mùi GC-O (Gas Chromatography Olfactometry) Lịch sử GCO Năm 1952, máy sắc kí khí GC đời chủ trì giáo sư Keulemann, cộng ... phẩm việc sử dụng GC Năm 1964 Fuller, Steltenkamp, Tisserand thông báo miêu tả hệ thống GC thay đổi cho mục đích Năm 1972 phiên GC-O (Gas chromatography- Olfaction) đời với thiết bị tạo không khí ... kết hợp với van chuyển cột tự động cho phép tự động chuyển cột trình phân tích 2.2 GC-O (Gas Chromatography Olfactometry) Phân tích phương pháp GCO kĩ thuật phân tích tổng hợp từ hai cách thức phân

Ngày tải lên: 01/03/2017, 19:59

... Journal of Science: Earth and Environmental Sciences, Vol 35, No (2019) 58-73 Original Article Method of Interpreting the High Resolution Seismic Profiles: Principle and Application in Coastal ... Transgressive systems tract (TST) and Highstand systems tract (HST) On that basis, Tran Nghi (2012) established an integrated general formula between lithofacies and systems tract: (1) Li LST = ... Alluvial facies of lowstand systems tract; at - Alluvial facies of transgressive systems tract; ah - Deltaic facies of lowstand systems tract; amr - Deltaic facies of highstand systems tract; amt-

Ngày tải lên: 24/09/2020, 04:45

... microarrays, FISH), non-specific protein signals (e.g protein mass spectrometry) , or limited resolution of species (e.g nucleotide mass spectrometry) 5–7 Sequencing with conserved primers targeting ... Microvalve-based dPCR devices (e.g Fluidigm’s qdPCR) not have high resolution heating blocks necessary for high resolution melt curve generation and moreover are not programmed to capture fluorescence ... 26 April 2016 accepted: 10 January 2017 Published: 08 February 2017 Massively parallel digital high resolution melt for rapid and absolutely quantitative sequence profiling Daniel Ortiz Velez1,

Ngày tải lên: 04/12/2022, 15:16

... Metabolites Amino acids High resolution tandem mass spectrometry a b s t r a c t We developed a new multiplexed reversed phase liquid chromatography -high resolution tandem mass spectrometric (LC-MS/MS) ... labeling and liquid chromatography -high resolution tandem mass spectrometry Juho Heininen a, Ulrika Julku b, Timo Myöhänen b, Tapio Kotiaho a,c, Risto Kostiainen a,∗ a Drug Research Program and Division ... important [14–17] LC-MS and gas chromatography- mass spectrometry (GC-MS) have been widely used for the analysis of amino acids However, both methods are relatively slow and higher sample throughput

Ngày tải lên: 25/12/2022, 02:47

... OF POLYCYCLIC AROMATIC HYDROCARBONS IN BARBECUED PORK USING QUECHERS EXTRACTION AND GAS CHROMATOGRAPHY – MASS SPECTROMETRY Nguyen Van Phuc1 Ho Chi Minh City University of Food Industry ARTICLE ... and giving a warning for human health MATERIAL AND METHODS Reagents and materials Reagents: A mixture of 16 PAHs (2000 mg.L-1 in hexane and a purity of> 99%) was supplied by Merck (Germany) and ... centrifuge tubes) were washed with soap and water and rinsed with acetone and n-hexane prior to use and between samples Samples: Blank sample was lean pork meat and grilled pork was purchased from

Ngày tải lên: 20/12/2019, 16:39

... OF POLYCYCLIC AROMATIC HYDROCARBONS IN BARBECUED PORK USING QUECHERS EXTRACTION AND GAS CHROMATOGRAPHY – MASS SPECTROMETRY Nguyen Van Phuc1 Ho Chi Minh City University of Food Industry ARTICLE ... and giving a warning for human health MATERIAL AND METHODS Reagents and materials Reagents: A mixture of 16 PAHs (2000 mg.L-1 in hexane and a purity of> 99%) was supplied by Merck (Germany) and ... centrifuge tubes) were washed with soap and water and rinsed with acetone and n-hexane prior to use and between samples Samples: Blank sample was lean pork meat and grilled pork was purchased from

Ngày tải lên: 14/01/2020, 17:37

... OF POLYCYCLIC AROMATIC HYDROCARBONS IN BARBECUED PORK USING QUECHERS EXTRACTION AND GAS CHROMATOGRAPHY – MASS SPECTROMETRY Nguyen Van Phuc1 Ho Chi Minh City University of Food Industry ARTICLE ... 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 ... Rugged and Safe) extraction and GC-MS in SIM mode analysis allowed for quantification of 16 PAHs in very small concentrations (10 - 100ppb) with recoveries of 83.8 to 113.4% on spiked sample and

Ngày tải lên: 09/02/2020, 09:07

... OF POLYCYCLIC AROMATIC HYDROCARBONS IN BARBECUED PORK USING QUECHERS EXTRACTION AND GAS CHROMATOGRAPHY – MASS SPECTROMETRY Nguyen Van Phuc1 Ho Chi Minh City University of Food Industry ARTICLE ... and giving a warning for human health MATERIAL AND METHODS Reagents and materials Reagents: A mixture of 16 PAHs (2000 mg.L-1 in hexane and a purity of> 99%) was supplied by Merck (Germany) and ... centrifuge tubes) were washed with soap and water and rinsed with acetone and n-hexane prior to use and between samples Samples: Blank sample was lean pork meat and grilled pork was purchased from

Ngày tải lên: 02/03/2020, 16:02

... OF POLYCYCLIC AROMATIC HYDROCARBONS IN BARBECUED PORK USING QUECHERS EXTRACTION AND GAS CHROMATOGRAPHY – MASS SPECTROMETRY Nguyen Van Phuc1 Ho Chi Minh City University of Food Industry ARTICLE ... and giving a warning for human health MATERIAL AND METHODS Reagents and materials Reagents: A mixture of 16 PAHs (2000 mg.L-1 in hexane and a purity of> 99%) was supplied by Merck (Germany) and ... centrifuge tubes) were washed with soap and water and rinsed with acetone and n-hexane prior to use and between samples Samples: Blank sample was lean pork meat and grilled pork was purchased from

Ngày tải lên: 01/05/2021, 11:19

... m/z Fig EI? ?mass and EI–tandem mass spectra of ClNP1EO and ClNP1EC as the precursor ions Fig shows the mass spectra of EI–MS and EI–MS–MS under the optimum CID conditions for ClNP1EO and ClNP1EC ... h Results and discussion 3.1 Mass and tandem mass spectra 2.4 GC–MS analysis The GC–MS analysis was done on a Varian 3800 gas chromatograph coupled with a Varian Saturn 2000 ion-trap mass spectrometer ... chromatography? ? ?mass spectrometry (GC–MS) [10–16] and liquid chromatography? ? ?mass spectrometry (LC–MS) [7,8,17–20] have been shown to be efficient for the determination of alkylphenol polyethoxylates and

Ngày tải lên: 18/10/2022, 15:41

... total protein concentration and by western blotting, which only provides semi-quantitative information for GP1 Therefore, a liquid chromatography high resolution mass spectrometry (LC-HRMS) approach ... 10.1186/s12014-016-9119-8 Clinical Proteomics Open Access RESEARCH Development of a liquid chromatography high resolution mass spectrometry method for the quantitation of viral envelope glycoprotein in Ebola ... process can be optimized, and the total amount of GP1 needed to confer protection accurately determined Keywords:  Ebola virus, Virus like particles, High resolution mass spectrometry, Stable isotope

Ngày tải lên: 24/11/2022, 17:39

... the evaluation of their quality and their safety and for the understanding of their sensory properties [3,5,6] One-dimensional gas chromatography hyphenated to a mass spectrometer (GC-MS) or to ... two-dimensional gas chromatography (GC × GC) coupled to mass spectrometry (MS) Sample preparation of the volatile compounds, important for the organoleptic characteristics of different whiskeys and their ... profile of whiskey samples using solid-phase microextraction Arrow and comprehensive two-dimensional gas chromatography- mass spectrometry Antonio Ferracane a,b, Natalia Manousi b,c, Peter Q Tranchida

Ngày tải lên: 20/12/2022, 21:29

... was used as the desolvation gas and nitrogen was used as the collision gas The instrument parameters were set as follows: nebuliser gas and turbo gas: 40 psi, curtain gas: 20 psi, ion spray voltage: ... et al., Ultrahigh-performance liquid chromatography tandem mass spectrometry with electrospray ionization quantification of tryptophan metabolites and markers of gut health in serum and plasma-application ... physiological and pathological values previously described, and results are reported in Table for LOD and LOQ, and Table for ULOQ, which corresponded to the highest calibration standards quantified

Ngày tải lên: 20/12/2022, 21:39

... Development and validation of a semi-quantitative ultra -high performance liquid chromatography- tandem mass spectrometry method for screening of selective androgen receptor modulators in urine Emiliano ... growth and reduce fat mass also remains a distinct threat [44] Advanced and reliable screening and confirmatory analytical assays are required to detect SARM use for doping practices in sport and ... in equine (72%) and human (47%) urine, both BMS-564929 and RAD140 in bovine (50%) and canine (57%) urine, and RAD140 in murine (81%) urine matrix, respectively On the other hand, the greatest

Ngày tải lên: 25/12/2022, 00:41

... in 1% formic acid and stored at )20 °C until MS analysis High mass MALDI-TOF MS High- mass MALDI-TOF mass spectra of the intact protein complexes were obtained using a MALDI-TOF mass spectrometer ... treated with BS2G are seen in lanes and 8, and 11 and and 13, respectively Similar samples treated with BS3 are seen in lanes and 9, and 12 and and 14, respectively The arrows show the cross-linked ... protein bands resolved by SDS ⁄ PAGE and, corresponding to monomeric Ure2p, monomeric Ssa1p and Ure2p–Ssa1p complexes with apparent molecular masses of 120 and 160 kDa were excised Each protein band...

Ngày tải lên: 15/03/2014, 00:20

... using 48 randomly chosen SNP markers, of which four came from the Orpheus Island and three from the Great Keppel Island, which are 80 km (NNW) and 570 km (SSE) away from Magnetic Island, respectively ... EM and MVM performed the cross and larval rearing SW and LZ conducted DNA preparation, SNP and microsatellite genotyping, and linkage analysis EM conducted comparative genome analysis SW, EM and ... randomly selected 48 SNP markers to test their applicability on colonies from Australian Great Barrier Reef locations, Orpheus Island (n = 4) and Great Keppel Island (n = 3), which are 80 km and...

Ngày tải lên: 09/08/2014, 20:20

... gel electrophoresis (SDS-PAGE) and peptide mass sequencing using liquid chromatography tandem mass spectrometry (LC–MS/MS) Results and Discussion • Preparation and characterization of ethyleneglycol-protected ... microbalance [16], mass spectrometry [17–19], and microarrays [20–26] With the power of peptide sequencing and database searches for unknown protein identification, however, mass spectrometry has ... visualization and peptide sequence identification using liquid chromatography tandem mass spectrometry (LC–MS/MS) Conclusions: The assay combining efficient magnetic separation and MALDI–MS readout...

Ngày tải lên: 11/08/2014, 08:20