Relevant bibliographies by topics / Liquid chromatography research

Academic literature on the topic 'Liquid chromatography research'

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Published: 4 June 2021
Last updated: 21 February 2023

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Journal articles on the topic "Liquid chromatography research"

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Yatsenko, Larisa Anatolyevna, Maria Yurevna Printseva, Ilya Danilovich Cheshko, and Artur Alexandrovich Tumanovsky. "Detection of residues and determination of the composition of combustible components in case of explosions of vapor-gas-air mixtures." Technology of technosphere safety 97 (2022): 51–60. http://dx.doi.org/10.25257/tts.2022.3.97.51-60.

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Introduction. Liquefied hydrocarbon gases (LHG) are widely used in various fields. The main components of LHG are: propane, isobutane and n-butane, which are not only combustible, but also explosive gases capable of detonation combustion. The detection of LHG in the air is a very urgent task in expert studies. To determine the component composition of various flammable liquids, for the purpose of their identification, chromatographs equipped with a capillary quartz column with a phase that allows detecting saturated hydrocarbons of the homologous series from pentane to pentatetracontane inclusive are used in the Forensic Expertise Institutions of Federal Fire Service of EMERCOM of Russia. However, it is not possible to analyze the component composition of lighter hydrocarbons according to the previously proposed and used in expert practice method for detecting and studying flammable liquids/high liquids under these conditions. To solve the problem of unification of the use of the instrumental base for the detection of residues of flammable liquids, liquid liquids and light hydrocarbons, new chromatography conditions were selected using the existing equipment set. Goals and objectives. The aim of the study is to select the analysis conditions for detecting the remains of liquefied hydrocarbon gases after explosions of steam-air mixtures on the basis of the instrumental gas chromatographic complex in service with the Forensic Expertise Institutions of Federal Fire Service of EMERCOM of Russia. Research methods. To detect and determine the composition of residues of combustible components during explosions of vapor-gas-air mixtures, a hardware-software instrumental complex based on a gas-liquid chromatograph equipped with a flame ionization detector, a ZB-50 capillary column, and an attachment from a two-stage thermal desorber was used. Results and its discussion. In the course of the study, the optimal conditions for conducting gas chromatographic analysis were defined and selected in order to detect liquefied hydrocarbon gases. Recommended pressures are given for various carrier gases. It is shown that, by varying the pressure and inlet temperature, light hydrocarbons propane, butane, isobutane is fairly well separated on a gas-liquid chromatograph with a flame ionization detector and on a ZB-50 capillary column 30 meters long. Conclusion. The research shows that the problem of combining a hardware-software instrumental complex based on a gas chromatograph with an attachment from a two-stage thermal desorber used for the analysis of two groups of substances (liquefied hydrocarbons and flammable liquids, gas liquids) is solved by varying the pressure and temperature of the input. Keywords: gas-liquid chromatography, thermal desorption, liquefied petroleum gases, light hydrocarbons, air-fuel mixtures, vapor-gas-air mixtures, explosion, fire examination.
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Lange, Mike, Zhixu Ni, Angela Criscuolo, and Maria Fedorova. "Liquid Chromatography Techniques in Lipidomics Research." Chromatographia 82, no. 1 (November 16, 2018): 77–100. http://dx.doi.org/10.1007/s10337-018-3656-4.

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Wang, Peng, Jun Cai, Dong Hao Li, and Xiang Fan Piao. "Research on Multidimensional Liquid Chromatography Sample Pretreatment System." Applied Mechanics and Materials 701-702 (December 2014): 832–35. http://dx.doi.org/10.4028/www.scientific.net/amm.701-702.832.

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Using multidimensional liquid chromatography technology, a liquid chromatography sample pretreatment system which was controlled by a microcontroller was designed. Real sample pretreatment experiments have been done. The experimental results showed that the complex samples can be separated effectively with this system according to 3 polarities. The operation of this system is simple, fast and high automatic, which meet the requirements of pretreatment of liquid chromatography complex samples.
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YANG, Sandong, Naijie LI, Zhou MA, Tao TANG, and Tong LI. "Research advances in nano liquid chromatography instrumentation." Chinese Journal of Chromatography 39, no. 10 (October 1, 2021): 1065–76. http://dx.doi.org/10.3724/sp.j.1123.2021.06017.

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van de Meent, Michiel H. M., and Gerhardus J. de Jong. "Novel liquid-chromatography columns for proteomics research." TrAC Trends in Analytical Chemistry 30, no. 11 (December 2011): 1809–18. http://dx.doi.org/10.1016/j.trac.2011.06.012.

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Arnold, P. J., R. Guserle, V. Luckow, R. Hemmer, and H. Grote. "Liquid chromatography-mass spectrometry in metabolic research." Journal of Chromatography A 554, no. 1-2 (August 1991): 267–80. http://dx.doi.org/10.1016/s0021-9673(01)88455-7.

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Dembek, Mikołaj, and Szymon Bocian. "Stationary Phases for Green Liquid Chromatography." Materials 15, no. 2 (January 6, 2022): 419. http://dx.doi.org/10.3390/ma15020419.

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Industrial research, including pharmaceutical research, is increasingly using liquid chromatography techniques. This involves the production of large quantities of hazardous and toxic organic waste. Therefore, it is essential at this point to focus interest on solutions proposed by so-called “green chemistry”. One such solution is the search for new methods or the use of new materials that will reduce waste. One of the most promising ideas is to perform chromatographic separation using pure water, without organic solvents, as a mobile phase. Such an approach requires novel stationary phases or specific chromatographic conditions, such as an elevated separation temperature. The following review paper aims to gather information on stationary phases used for separation under purely aqueous conditions at various temperatures.
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Schmidt, Axel, Fabian Mestmäcker, Lisa Brückner, Tobias Elwert, and Jochen Strube. "Liquid-Liquid Extraction and Chromatography Process Routes for the Purification of Lithium." Materials Science Forum 959 (June 2019): 79–99. http://dx.doi.org/10.4028/www.scientific.net/msf.959.79.

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Since several years, the lithium market is characterized by high growth rates especially due to the increasing demand for lithium-ion batteries. Therefore, the primary production is currently expanded and there is a growing interest in recycling. However, because of the chemical properties of lithium, many production processes lack efficient processes for the separation, concentration and purification of lithium. This article reviews the current use of liquid-liquid extraction (LLE) and chromatography in lithium production as well as research. Currently, the industrial application of LLE and chromatography in lithium purification is limited to the extraction of impurities and co-products. Extraction of lithium is only used as concentration step in few processes before lithium precipitation. In research and development, a wide variety of extractants and resins is investigated. In LLE, chelating extractants like crown ethers and calixarene and synergistic systems show the greatest potential. In the chromatographic separation the main focus of research lies upon cation exchange media, especially media with sulfonated ligands. However, most research is still in early development. Therefore, extensive research is needed to enable the industrial use of optimized LLE and chromatography processes in lithium production. Content TOC \o "1-3" \h \z \u HYPERLINK \l "_Toc515547308" Abstract PAGEREF _Toc515547308 \h 2 HYPERLINK \l "_Toc515547309" Content PAGEREF _Toc515547309 \h 3
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Kataev, S. S., O. N. Dvorskaya, M. A. Gofenberg, A. V. Labutin, and A. B. Melentyev. "ANALYTICAL FEATURES OF SYNTHETIC MDMB(N)-073F CANNABIMIMETICS AND ITS MARKERS IN BIOLOGICAL MATERIAL." Pharmacy & Pharmacology 7, no. 4 (September 10, 2019): 184–97. http://dx.doi.org/10.19163/2307-9266-2019-7-4-184-197.

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The aim of the research is to study both analytical features of synthetic MDMB(N)-073F cannabimimetics of indazole carboxamides group by gas chromatography methods combined with tandem mass spectrometry (GC-MS) and high performance liquid chromatography with high-resolution mass spectrometry (HPLC-HRMS) as well as characteristics of the major MDMB(N)-073F metabolite, its glucuronide and derivatives, using gas chromatography with mass-spectrometric (GC-MS) detection and high-performance liquid chromatography (HPLC) with MS/MS mass spectrometry (HPLC-MS/MS) in urine samples to be applied in expert practice, chemical-toxicological and forensic and chemical analyses.Materials and methods. To carry out the study, the following materials were used: plant-based objects with narcotic drugs withdrawn from illegal trafficking and applied to them;. urine samples to be studied under chemical-toxicological and forensic and chemical analyses. For solid-phase epitaxy, SampliQ EVIDEX TFE cartridges – 200 mg – 3 ml (Agilent, USA) were used for sample preparation; β-glucuronidase, Type HP-2, From Helix Pomatia, 100000 UA/ml (Sigma-ALDRICH CHEMI, Germany) was used for enzymatic hydrolysis. GC-MS/MS analysis was made using Agilent 7890 gas chromatograph with a tandem quadrupolar mass-spectrometer Agilent 7000 (Agilent, США); GC-MS analysis was carrid out using gas chromatograph Agilent 7820 with mass-selective detector Agilent 5975 (Agilent, USA); HPLC-HRMS research was made on liquid chromatograph Agilent 1260 with tandem hybrid high-resolution quadrupole-time-of-flight detector Agilent 6540 (Agilent, США); liquid chromatograph Agilent 1260 with Agilent 6460 (Agilent, USA) with tandem mass-spectrometer were used for making HPLC-MS/MS research.Results. The structure of MDMB(N)-073F compound has been confirmed and an exact mass of the protonated molecule corresponding to the chemical formula C19H27FN3O3 fixed by GC-MS/MS and HPLC-HRMS methods. Spectral characteristics of MDMB(N)-073F have been given. One of the branches in MDMB(N)-073F biotransformation in the human body found out by GC-MS and HPLC-MS/MS methods, is the ester decomposition with further conjugation of the resulting acid. The product interacting with glucuronic acid, is found to be the conjugate of major MDMB(N)-073F metabolite of the Ist phase in biotransformation. Metabolites appearing due to the ester decomposition and its conjugate with glucuronic acid, are recommended to be used as markers for synthetic MDMB(N)-073F cannabimimetics in the analysis by chromatographic methods; they can be used for regular screening of biological samples.Conclusion. The research results presented here, are the following: the analytical features characteristic for synthetic MDMB(N)-073F cannabimimetics found out by gas chromatography methods combined with tandem mass spectrometry (GC-MS/ MS) and liquid chromatography of hybrid high-resolution quadrupole-time-of-flight mass spectrometry (HPLC-HRMS), as well as characteristics of major MDMB(N)-073F metabolite, its glucuronide and derivatives with the use of gas chromatography with mass-spectrometric detection (GC-MS) and liquid chromatography combined with tandem mass spectrometry (HPLC-MS/MS) in urine samples to be applied in expert practice, chemical-toxicological, forensic and chemical analyses.
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Wang, Chao, Qiang Ma, and Xing Wang. "Determination of Alkylphenol Ethoxylates in Textiles by Normal-Phase Liquid Chromatography and Reversed-Phase Liquid Chromatography/Electrospray Mass Spectrometry." Journal of AOAC INTERNATIONAL 90, no. 5 (September 1, 2007): 1411–17. http://dx.doi.org/10.1093/jaoac/90.5.1411.

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Abstract Comprehensive analytical methods based on pressurized liquid extraction followed by normal-phase liquid chromatography (NPLC) with ultraviolet detection and reversed-phase liquid chromatography (RPLC)/electrospray mass spectrometry (MS) have been developed for determination of alkylphenol ethoxylates (APEOs) in textile samples. NPLC with an aminosilica column allowed for the chromatographic separation of APEOs according to the increasing number of ethylene units and revealed the exact distribution of individual oligomers. RPLC coupled with electrospray MS was highly sensitive and enabled the complete qualitative and quantitative determination of individual APEOs in textile samples. The 2 analytical methods based on different chromatographic separation mechanisms, i.e., NPLC and RPLC, may provide complementary information of APEOs in textile materials. The 2 detection methods were successfully applied to the investigation of various textile samples, and the data of our research suggested actual pollution in real textile products.
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Dissertations / Theses on the topic "Liquid chromatography research"

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Wong, Victor, University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "A fundamental study towards improving the performance of liquid chromatographic separation." THESIS_CSTE_SFH_Wong_V.xml, 2003. http://handle.uws.edu.au:8081/1959.7/467.

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The three factors of the resolution (Rs)equation(see Equation 1.1)were explored in this thesis. During the course of the research project, an important aim was to explore separation processes that would lead to an increase in productivity without sacrificing Rs. To that end, an increase in the retention factor (k)to enhance Rs was deemed detrimental to the cycle time, hence the production rate, particularly when preparative separations are involved. Consequently the primary objectives were to (i)prepare more efficient columns and (ii)investigate new strategies in manipulating selectivity. The significance of the work contained in this thesis is highlighted in 27th International Symposium on High Performance Liquid Phase Separations and Related Techniques (HPLC 2003)held in Nice, France between 15-19 June, 2003. Many of the papers presented significantly compared to chapters contained in this research
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Wilson, William Henry. "Packed capillary columns for liquid chromatography." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/37746.

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Wong, Victor. "A fundamental study towards improving the performance of liquid chromatographic separation." Thesis, View thesis, 2003. http://handle.uws.edu.au:8081/1959.7/467.

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The three factors of the resolution (Rs)equation(see Equation 1.1)were explored in this thesis. During the course of the research project, an important aim was to explore separation processes that would lead to an increase in productivity without sacrificing Rs. To that end, an increase in the retention factor (k)to enhance Rs was deemed detrimental to the cycle time, hence the production rate, particularly when preparative separations are involved. Consequently the primary objectives were to (i)prepare more efficient columns and (ii)investigate new strategies in manipulating selectivity. The significance of the work contained in this thesis is highlighted in 27th International Symposium on High Performance Liquid Phase Separations and Related Techniques (HPLC 2003)held in Nice, France between 15-19 June, 2003. Many of the papers presented significantly compared to chapters contained in this research
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Alsugair, Khaled A. S. "Feasibility of artificial cells in molecular sieve chromatography." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63922.

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Motley, Curtis Bobby. "The evaluation of an argon and helium highly efficient microwave induced plasma as an element selective detector for packed column super critical fluid chromatography." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/37740.

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Murphy, Kellyann M. "Analysis of Biodiesel Quality Using Reversed Phase High-Performance Liquid Chromatography." Scholarship @ Claremont, 2012. http://scholarship.claremont.edu/pomona_theses/45.

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The alternative fuel biodiesel is produced from the transesterification of vegetable oils or animal fat to fatty acid methyl esters. Pomona has a reactor on campus that can be used to run this reaction and produce biodiesel. The use of biodiesel has been found to lower air pollutant and greenhouse gas emissions, but can be potentially harmful to the engines if it contains impurities. This paper proposes a method using high-performance liquid chromatography to test the quality of biodiesel. This method utilizes instrumentation and materials that are available in Pomona College's Chemistry Department, requires very little sample preparation, and is relatively safe, as long as general lab safety practices are followed. This method can also be used to optimize the procedure used to make the biodiesel. An optimized production procedure and a test method to assess the final product will ensure high quality fuel that can be used with confidence in diesel engines. This will likely add strength to proposals to increase the use of the on-campus reactor and produce biodiesel for campus grounds equipment from waste vegetable oil.
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Li, Shangfu. "Development of chemical derivatization methods for cis-diol-containing metabolite detection by using liquid chromatography-mass spectrometry." HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/323.

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Cis-diol-containing metabolites have attracted increasing attention in recent years. These metabolites widely exist in the body fluids and tissues. They play important roles in the structure, function and metabolic activity of cells. Some of them are related to cell proliferation and metabolic processes. And they have been used to denote a state of disease as potential biomarkers. Several methods have been developed for the analysis of cis-diol-containing metabolites. However, these methods faced a challenge to separate and detect isomers of these compounds, particularly for compounds with low abundance and high polarity. Therefore, novel methods were necessary to improve the separation and detection sensitivity of this kind of metabolites. With this aim, chemical derivatization methods were developed for cis-diol-containing metabolite detection by using liquid chromatography-mass spectrometry in this project. These methods were optimized and validated to achieve the optimal reaction conditions. And they were applied to study real-world biological systems, including the changes of modified nucleosides in hepatocellular carcinoma (HCC) nude mice and toxic effects of bisphenol A (BPA) exposure. Firstly, the derivatization reaction of cis-diol compounds with acetone were optimized. Factors that affected reaction efficiency were investigated by reacting guanosine (G) with acetone. The optimal reaction conditions were validated by detecting four acetonides of urinary nucleosides by using LC-MS/MS. The results showed that the approach had good linearity, accuracy and precision. The recoveries were ranged from 92.9% to 103.5%. It indicated that the assay was reproducible. The robust method should be potentially useful for the analysis of modified nucleosides and other cis-diol-containing metabolites in biological samples. The validated derivatization method was applied to determine urinary nucleosides by LC-MS. This method not only improved the retention of nucleosides on reversed-phase column, but also reduced the matrix effect from urine samples and enhanced detection sensitivity of mass spectrometry. Isotope labeling method with acetone-d6 and multivariate statistical analysis enabled the positive identification of 56 nucleosides, including 52 modified nucleosides. The obtained results indicated that the derivatization method was practical, fast and effective for the identification of urinary nucleosides. It was successfully applied to study the changes of urinary nucleosides in nude mice bearing HCC. Some significantly changed nucleosides were identified as potential biomarkers. Subsequently, this approach was modified by employing parallel reaction monitoring (PRM) method which was based on high resolution MS to detect urinary nucleosides in rats exposed to BPA. Comparing to the data acquired by triple quadrupole MS with neutral loss scanning, higher specificity and sensitivity were achieved by using PRM scanning mode. Therefore, more nucleosides were identified by using the method in urine samples (from 56 up to 66). The changes of the detected nucleosides were studied in the rats exposed to BPA. Various trends of modified nucleosides were observed with different dose BPA exposure. Specifically, the high-dose exposure group was the most strongly affected. The biomarker of RNA oxidation, 8-hydroxyguanosine (8-oxoG), showed significant change in this group. It proved that BPA exposure could induce RNA damage when the dose of BPA was beyond a certain amount. Except for nucleosides, other cis-diol-containing metabolites, such as carbohydrates, were also studied by using the derivatization method. Acetone and acetone-d6 were applied to label the cis-diol metabolites. Based on the chemical isotope labeling, cis-diol metabolites were easily recognized from urine samples. Influence of BPA exposure on these metabolites was investigated by comparing different doses of BPA administration on rats. Analytes showed noticeable difference were highlighted. Pathway analysis indicated that galactose metabolism, nucleoside and its analogues metabolism were disturbed. The derivatization method was extended to quantify nucleotides in plasma samples. According to the specific physical-chemical properties of nucleotides, the method was improved to fit the requirement of analysis by using 1,1-Dimethoxycyclohexane (DMCH) as derivatization agent and formic acid (FA) as catalyst. Tip micro-columns packed with TiO2 were used for selective adsorption of nucleotides in the plasma. Then in-situ derivatization were carried out to change the polarity of targeted compounds. LC-MS analysis of the derivatization products were employed without using ion-pairing reagents. This method exhibited a high selectivity for the extraction of nucleotides. After derivatization, retention of nucleotides on reversed-phase C18 column was improved. Complete separation of nucleotides with the same base was achieved. The peak shape was symmetrical and the tailing was eliminated by using high pH mobile phase. The method settled the problems of nucleotide detection, which were poor retention, trailing, in-source fragmentation and contamination of ion-pairing reagents. The quantitative method was successfully applied to determine the content of nucleotides in plasma samples of rats exposed to BPA. It was simple and fast, as well as good selectivity and stability. It could be extended to detection of other phosphorylated metabolites with similar structure. To our best knowledge, it was the first time to employ derivatization methods to detect cis-diol-containing metabolites. The methods decreased the matrix effects of complex biological samples, and also decreased the polarity of cis-diol-containing metabolites. The changes of properties not only improved the chromatographic separation, but also enhanced the MS intensities. The methods overcame the problems of cis-diol-containing metabolite detection on reversed-phase column. They were successfully applied to study the changes of cis-diol-containing metabolites of HCC and toxic effects of BPA exposure. The method might be extended to determine other cis-diol-containing metabolites in urine samples as well as in cells, tissues and plasma samples. It might be valuable for the understanding of the roles of cis-diol-containing metabolites in in cell metabolism.
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Swensen, Adam Clayton. "Investigation of Dynamic Biological Systems Using Direct Injection and Liquid Chromatography Mass Spectrometry." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6574.

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In biological systems, small changes can have significant impacts. It is, therefore, very important to be able to identify these changes in order to understand what is occurring in the organism. In many cases, this is not an easy task. Mass spectrometry has proven to be a very useful tool in elucidating biological changes even at a very small scale. Several different mass spectrometry based techniques have been developed to discover and investigate complex biological changes. Some of these techniques, such as proteomics, have been through years of development and have advanced to the point that anyone can complete complex analyses of global protein identification and measurement with relative ease. Other techniques are still developing and still have some ground to cover in terms of experimental outcome and ease of execution. Herein we show improvements we have made in high-throughput high-resolution mass spectrometry based techniques to identify and quantify small molecules that are involved in significant biological changes. To begin, we show that our improved high-resolution mass spectrometry based lipidomics techniques are capable of identifying small changes in diseased states that are associated with inflammation, mitochondrial shape and function, and cancer. With our techniques we have been able to extract, identify, and quantify several thousand unique lipid species from complex samples with confidence. Our initial studies looked at global lipidome profiles of differing tissue types from human and mouse biopsies. This was then adapted to compare the global lipidomes of diseased states against healthy states in asthmatic lung tissue, cigarette smoke treated cells, high fat high sugar (HFHS) stressed animals (with and without additional treatment), and in signaling lipids associated with cell death resistance and growth signaling in pancreatic cancer. As a result of our success with lipidomic method improvement we then adapted our techniques and knowledge for use in elucidating small molecule signaling peptides and oxidation changes in proteins. We were able to show that our improved liquid chromatography mass spectrometry based small molecule assays are capable of identifying and quantifying small peptides and protein modifications that would otherwise be undetectable using traditional techniques. This work resulted in the development of a scalable method to detect and quantify the small iron-regulatory hormone known as hepcidin from a variety of samples such as blood, urine, and cell-culture media. We were also instrumental in evaluating and revising a new ultra-high pressure liquid chromatography (UHPLC) system that allows for better separation of analytes from complex mixtures for identification and quantification. Through these advances we hope to aid researchers and clinicians to enable them to use mass spectrometry to further our knowledge about the small but significant changes that regulate complex biological systems.
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Goodpaster, Aaron M. "Statistical Analysis Methods Development for Nuclear Magnetic Resonance and Liquid Chromatography/Mass Spectroscopy Based Metabonomics Research." Miami University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=miami1312317652.

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Lai, Yongquan. "Development and application of liquid chromatography mass spectrometry methods for the analysis and toxicity study of polybrominated diphenyl ether metabolites." HKBU Institutional Repository, 2012. https://repository.hkbu.edu.hk/etd_ra/1437.

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Books on the topic "Liquid chromatography research"

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Bruce, Holman R., Cross Alan J, and Joseph M. H. 1943-, eds. High performance liquid chromatography in neuroscience research. Chichester: J. Wiley, 1993.

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Reinhard, Matissek, and Wittkowski Reiner, eds. High performance liquid chromatography in food control and research. Lancaster, Pa., U.S.A: Technomic Pub. Co., 1993.

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LC/MS applications in drug development. New York: J. Wiley & Sones, 2002.

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Lunn, George. HPLC methods for pharmaceutical analysis. New York: Wiley, 1997.

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Yoshioka. Supercritical Fluid Chromatography And Micro-hplc (Progress in HPLC). Brill Academic Publishers, 1988.

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M, Yoshioka, ed. Supercritical fluid chromatography and micro-HPLC /editors, M. Yoshioka ... [et al.]. Utrecht, the Netherlands: VSP, 1989.

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High performance liquid chromatography in food control and research. Behr's, 1992.

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Brown, Phyllis R. HPLC in Nucleic Acid Research: Methods and Applications. Taylor & Francis Group, 2020.

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Brown, Phyllis R. HPLC in Nucleic Acid Research: Methods and Applications. Taylor & Francis Group, 2020.

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Brown, Phyllis R. HPLC in Nucleic Acid Research: Methods and Applications. Taylor & Francis Group, 2020.

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Book chapters on the topic "Liquid chromatography research"

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Yang, Peilin, and Matthias Pursch. "Applications of Two-Dimensional Liquid Chromatography to Chemical Analysis in Academic Research and Industry." In Multi-Dimensional Liquid Chromatography, 309–28. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003090557-11.

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Maithani, Mukesh, and Parveen Bansal. "Research Envisaged." In Development of Novel Stability Indicating Methods Using Liquid Chromatography, 35–36. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8723-4_2.

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Sütfeld, R. "HPLC of Thiophenes for Phytochemical and Biochemical Research." In High Performance Liquid Chromatography in Plant Sciences, 104–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-82951-2_7.

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Hsu, Chang Samuel. "Coupling Mass Spectrometry with Liquid Chromatography (LC-MS) for Hydrocarbon Research." In Analytical Advances for Hydrocarbon Research, 267–84. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-9212-3_11.

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Díaz, Caridad, and Carmen González-Olmedo. "Untargeted Metabolomics by Liquid Chromatography–Mass Spectrometry in Biomedical Research." In Mass Spectrometry for Metabolomics, 57–69. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2699-3_6.

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Smrcka, Alan V., and Richard G. Jensen. "High Performance Liquid Chromatography of Key Sugar Phosphates Involved in Photosynthetic Carbon Reduction." In Progress in Photosynthesis Research, 281–84. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-017-0516-5_59.

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Larsson, L., B. Libert, and M. Asperud. "Determination of Urinary Oxalate by Reversed-Phase ION-Pair “High-Performance” Liquid Chromatography." In Urolithiasis and Related Clinical Research, 661–64. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4684-7272-1_141.

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Sugimoto, T., J. Blömer, E. Jungling, F. Recker, Y. Funae, and R. Hautmann. "The Value of Oxalate Determination by High-Performance Liquid Chromatography in Clinical Practice." In Urolithiasis and Related Clinical Research, 673–76. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4684-7272-1_144.

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Matsuura, Takakazu, Izumi C. Mori, Yoko Ikeda, Takashi Hirayama, and Koji Mikami. "Comprehensive phytohormone quantification in the red alga Pyropia yezoensis by liquid chromatography–mass spectrometry." In Protocols for Macroalgae Research, 225–36. Boca Raton : Taylor & Francis, 2018.: CRC Press, 2018. http://dx.doi.org/10.1201/b21460-14.

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Satheeshkumar, N., David Paul, and A. Lingesh. "Liquid Chromatography–Mass Spectrometry (LC–MS): Approaches to Adulterant Detection in Herbal Products." In Medicinal Plants - Recent Advances in Research and Development, 73–95. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1085-9_3.

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Conference papers on the topic "Liquid chromatography research"

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Chu, Chaoqun, Jinghai Piao, Yumei Song, Donghao Li, and Xiangfan Piao. "Research on Liquid Chromatography Step Injection System." In 2013 Third International Conference on Instrumentation, Measurement, Computer, Communication and Control (IMCCC). IEEE, 2013. http://dx.doi.org/10.1109/imccc.2013.232.

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Luca, Simon Vlad. "The role of liquid-liquid chromatography in natural product research." In New frontiers in natural product chemistry, scientific seminar with international participation. Institute of Chemistry, 2021. http://dx.doi.org/10.19261/nfnpc.2021.ab02.

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Piao, Jinghai, Chaoqun Chu, Meihua Zhang, Donghao Li, and Xiangfan Piao. "Research on Combining System of Gas Flow Liquid Phase Microextraction and Gas Chromatography." In 2012 Second International Conference on Instrumentation, Measurement, Computer, Communication and Control (IMCCC). IEEE, 2012. http://dx.doi.org/10.1109/imccc.2012.263.

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Keke, Anete, and Ingmars Cinkmanis. "Determination of organic acids in honey samples from Latvian market by high-performance liquid chromatography." In Research for Rural Development 2019 : annual 25th International scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2019. http://dx.doi.org/10.22616/rrd.25.2019.034.

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Akhgar, Christopher Karim, Julian Ebner, Oliver Spadiut, Andreas Schwaighofer, and Bernhard Lendl. "Laser-based mid-infrared spectroscopy enables in-line detection of protein secondary structure from preparative liquid chromatography." In Biomedical Vibrational Spectroscopy 2022: Advances in Research and Industry, edited by Zhiwei Huang. SPIE, 2022. http://dx.doi.org/10.1117/12.2609419.

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Yusakul, G., P. Saensom, N. Mitsantia, C. Pengdee, and W. Putalun. "High-performance liquid chromatography for analysis of corosolic acid in Lagerstroemia species and their hypoglycemic activities." In 67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP. © Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-3399758.

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Jaikishin, S. P. V. D., D. A. Perwitasari, E. Darmawan, U. A. Mulyani, and J. Atthobari. "Validation of isoniazid for therapeutic drug monitoring in human plasma by high-performance liquid chromatography." In THE 2016 CONFERENCE ON FUNDAMENTAL AND APPLIED SCIENCE FOR ADVANCED TECHNOLOGY (CONFAST 2016): Proceeding of ConFAST 2016 Conference Series: International Conference on Physics and Applied Physics Research (ICPR 2016), International Conference on Industrial Biology (ICIBio 2016), and International Conference on Information System and Applied Mathematics (ICIAMath 2016). Author(s), 2016. http://dx.doi.org/10.1063/1.4953955.

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Keke, Anete, and Ingmars Cinkmanis. "α-amylase activity in freeze-dried and spray-dried honey." In Research for Rural Development 2020. Latvia University of Life Sciences and Technologies, 2020. http://dx.doi.org/10.22616/rrd.26.2020.017.

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Honey is a naturally supersaturated sugar solution, which tends to crystallize. The crystallization of honey can lead to unwanted fermentation that can have a negative impact to honey quality. The production of honey powder could be an alternative method to prevent honey from fermentation. Honey powder could be used as alternative substitute to liquid honey that would allow to use this product more widely in the food industry. α-amylase activity is one of the most important parameters to evaluate the quality of honey. The aim of this study was to investigate the effect of freeze-drying and spray-drying on honey α-amylase activity. Detection of α-amylase activity was carried out by spectrophotometric method. High-performance liquid chromatography was used to determine the content of hydroxymethylfurfural in the powders. The obtained results showed that both drying methods had a negative impact to the enzyme activity in the samples. The lowest activity of α-amylase (8.3 DN) was measured in the spray-dried honey powder. Concentration of hydroxymethylfurfural (HMF) in the powders did not exceed required concentration 40 mg kg-1.
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McGrath, Thomas, Adrian Covaci, Els Van Hoeck, Franck Limonier, Giulia Poma, Jasper Bombeke, Kevin Vanneste, Laure Joly, Mirjana Andjelkovic, and Raf Winand. "Gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-high resolution mass spectrometry (LC-HRMS) approaches for analysis of chlorinated paraffins in edible fats and oils." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/wycg9726.

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Chlorinated paraffins (CPs) are high production volume chemicals composed of complex mixtures of thousands of compounds that have been applied widely as flame retardants and plasticizers. CPs have demonstrated toxic and bioaccumulative properties, while evidence suggests dietary intake to constitute a major pathway for human exposure. This study reports on the optimization and validation of an analytical method for the quantification of short- and medium-chained CPs (SCCPs and MCCPs, respectively) using gas chromatography-mass spectrometry (GC-MS) in fats and oils, and the development of liquid chromatography-high resolution mass spectrometry (LC-HRMS) methods for investigation of long chain CP (LCCP) occurrence. Extraction was performed by ultrasonication in n-hexane and dichloromethane followed by sulphuric acid and acidified silica cleanup and fractionation on neutral silica to remove potentially interfering organohalogen contaminants. Quantification of GC-MS results using a chlorine-content calibration procedure was assessed via repeated analysis (n=3) of olive oil fortified with SCCP and MCCP technical mixtures at two concentration levels and spiked lard samples from a recent European Union Reference Laboratory (EURL) interlaboratory study. The average accuracy ranged from 76 to 126% in the olive oil samples and from 57 to 150% in fortified lard, meeting the EURLs acceptability criteria for all tests, while the precision was < 15%. The applicability of the method was demonstrated by analysis of 26 fats and oil samples purchased in Belgium. SCCPs were detected in 31% of samples, ranging < LOQ to 19 ng/g, and MCCPs were present in 85%, ranging < LOQ to 190 ng/g. Each of four samples selected for homologue profiling by LC-HRMS were also found to contain LCCPs. This research demonstrates reliable methods for CP analysis in fats and oils and highlights the potential for contamination of these products by CPs. Fats and oils appear to be substantial contributors to overall human exposure to CPs.
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Neza, E., and M. Centini. "Quantitative determination of phenolics compounds in Origanum vulgare extract by high-performance liquid chromatography coupled with tandem mass spectrometric detection." In 67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP. © Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-3399930.

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Reports on the topic "Liquid chromatography research"

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Kleinhenz, Michael D., Patrick J. Gorden, and Johann F. Coetzee. Utilization of Liquid Chromatography/Mass Spectrometry to Detect Drug Residues in Milk: Applications for Research and Commercial Dairying. Ames (Iowa): Iowa State University, January 2005. http://dx.doi.org/10.31274/ans_air-180814-1158.

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