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Gotowe bibliografie tematyczne / Chromatographic Conditions

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Gotowa bibliografia na temat „Chromatographic Conditions”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Chromatographic Conditions"

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Zhang, Jing, and Hongye Zhang. "Research progress on the detection of water-soluble vitamins in food using liquid chromatography." Theoretical and Natural Science 37, no. 1 (2024): 158–69. http://dx.doi.org/10.54254/2753-8818/37/20240183.

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Currently, liquid chromatography is widely used for the analysis and determination of water-soluble vitamins (WSVs) in functional foods. However, due to the diversity of sample characteristics and the requirement for purification accuracy, the chromatographic conditions and specific methods used vary. This paper reviews the chromatographic conditions of liquid chromatography techniques for detecting WSVs in food, as well as the selection of liquid chromatography methods in different application fields. The chromatographic conditions include chromatographic columns, column temperature, mobile p

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Ostapiv, R. D., and V. І. Tkachenko. "OPTIMIZATION OF LIQUID CHROMATOGRAPHIC CONDITIONS TO SEPARATE WATER-SOLUBLE VITAMINS." Scientific and Technical Bulletin оf State Scientific Research Control Institute of Veterinary Medical Products and Fodder Additives аnd Institute of Animal Biology 21, no. 1 (2020): 141–46. http://dx.doi.org/10.36359/scivp.2020-21-1.18.

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Vitamins are widely used in veterinary medicine, in particular, as components of premixes, feeds and feed additives to increase the productivity of farm animals. Most of these feed additives are a complex amino acid and vitamin mixtures (of ten active substances or more) based on the matrix of plant or animal origin, which can be enriched with protein. When the analyst is faced with the difficult task of analyzing such a mixture, it is usually necessary to use several variants of the HPLC method (high-performance liquid chromatography), which increases the time and cost of analysis of the prem

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Mahn, Andrea, M. Elena Lienqueo, and Juan A. Asenjo. "A Simple Method for the Estimation of Protein Retention in Hydrophobic Interaction Chromatography Under Different Operation Conditions." Open Biotechnology Journal 1, no. 1 (2007): 9–13. http://dx.doi.org/10.2174/1874070700701010009.

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Protein behavior in Hydrophobic Interaction Chromatography using different chromatographic conditions was investigated. A linear correlation was found between protein retention time on different matrixes and different initial elution salt concentrations. Mathematical correlations between retention times under different chromatographic conditions were obtained and validated, which can be used in process design and scale-up.

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Melikhova, Elena V., and Olga V. Farafonova. "Optimization of the Conditions for Determining 2,4-D and Deltamethrin by HPLC." Izvestiya of Saratov University. New Series. Series: Chemistry. Biology. Ecology 20, no. 4 (2020): 372–77. http://dx.doi.org/10.18500/1816-9775-2020-20-4-372-377.

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The paper presents the results of optimizing the conditions for the chromatographic determination of 2,4-dichlorophenoxyacetic acid and deltamethrin for two capillary columns (Supelcosil LC-18, Kromasil C-18). The modes of individual chromatography of pesticides were selected. The use of the isocratic elution mode in the joint presence of 2,4-dichlorophenoxyacetic acid and deltamethrin was shown and experimentally proved to be invalid. Three options were proposed for the conditions of the gradient mode of the separate detection of analytes in a mixture. The developed technique for the chromato

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Kholin, Andrey Yu, Svetlana V. Kurbatova, and Margarita N. Zemtsova. "Comparative analysis of the various structures quinoline derivatives retention under RP HPLC." Butlerov Communications 63, no. 8 (2020): 31–39. http://dx.doi.org/10.37952/roi-jbc-01/20-63-8-31.

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The study results of the structure and physicochemical parameters effect of various quinoline derivatives on their retention under conditions of reversed-phase high-performance liquid chromatography are presented. It is shown that since the establishment of the relationship between the structure of a substance and its properties is still one of the most important problems of modern chemistry and materials science, chromatography is a very convenient and effective method for obtaining the information necessary for this. To establish the relationship between the structure and sorption characteri

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Korshun, M. M., O. M. Korshun, A. O. Lipavska, T. I. Zinchenko, S. V. Bilous, and A. O. Аvramchuk. "OPTIMIZATION OF PESTICIDES RESIDUES ANALYTICAL CONTROL IN CEREAL CROPS PROTECTION SYSTEM." Medical Science of Ukraine (MSU) 15, no. 3-4 (2019): 76–84. http://dx.doi.org/10.32345/2664-4738.3-4.2019.12.

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Relevance. The scientific substantiation of the method selection, the development of conditions for qualitative identification and quantitative determination of Axial 050 EC, Peak 75 WG, Tilt 250 EC, Magnello 350 EC, Enzhio 247 SS, Karate Zeon 050 CC pesticides (by its simultaneous presence) used in cereal crops protection system was given in the article, as well as preparation conditions for the analysis of water and air samples were described, which will allow to control the established hygienic standards and minimize pesticide negative impact on population health and the environment.

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Jampilek, Josef, Malgorzata Dolowy, and Alina Pyka-Pajak. "Estimating Limits of Detection and Quantification of Ibuprofen by TLC-Densitometry at Different Chromatographic Conditions." Processes 8, no. 8 (2020): 919. http://dx.doi.org/10.3390/pr8080919.

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Ibuprofen is one of the best-known nonsteroidal anti-inflammatory and analgesic drugs. Following the previous work, the current study is focused on estimating the effect of different chromatographic conditions on the sensitivity of thin-layer chromatography in combination with UV densitometry, i.e., the detection and quantification of ibuprofen in a wide range of its concentrations including the lowest limits of detection (LOD) and quantification (LOQ). For this purpose, a reliable and easy-to-use calculation procedure for LOD and LOQ determination is presented in this work. In addition, the i

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Melikhova, E. V., and V. Yu Solovyova. "Gas Chromatographic Determination of Residual Concentrations of a Mixture of Organochlorine Pesticides in Food Products." Proceedings of the Southwest State University. Series: Engineering and Technology 13, no. 4 (2024): 163–73. http://dx.doi.org/10.21869/2223-1528-2023-13-4-163-173.

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Purpose of research. The aim of the work is to optimize the conditions for gas chromatographic determination of a mixture of eight organochlorine pesticides: aldrin, hexachlorobenzene, heptachlor, α-hexachlorocyclohexane, γ-hexachlorocyclohexane, dichlorodiphenyltrichloromethylmethane, dichlorodiphenyldichloroethane and dichlorodiphenyldichloroethylene.Methods. For chromatographic studies of organochlorine pesticides we used a Shimadzu GC-2010Plus gas chromatograph (Shimadzu, Japan) equipped with an automatic equilibrium vapor sample dispenser NT200N, electron-capture detector based on 63Ni an

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Vzduleva, Nadezhda O., and Valery B. Gitlin. "Optimization of the time the chromatograph thermostats exit to a given temperature." Izmeritel`naya Tekhnika, no. 6 (2020): 40–45. http://dx.doi.org/10.32446/0368-1025it.2020-6-40-45.

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The problems of ensuring the stability of the temperature of the chromatographic experiment carried out using a serial gas chromatograph LGH-3000 are considered. Limiting the permissible heating rate of the chromatograph thermostats does not allow a quick transition to the new conditions of the chromatographic experiment in accordance with the requirements of the technical conditions. The processes of heating and cooling the thermostat are analyzed. It is shown that the ratio of the duration of the interval equal to the sum of the durations of the heating and cooling intervals to the duration

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Romanyuk, Anna A., and Dmitry V. Moiseev. "Determination of the optimal conditions for the extraction of anthraglycosides of alder buckthorn bark, development and validation of a method for their quantitative determination by high performance liquid chromatography." Человек и его здоровье 25, no. 4 (2022): 118–27. http://dx.doi.org/10.21626/vestnik/2022-4/15.

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Objective: optimization of extraction conditions for anthraglycosides of alder buckthorn bark, development and validation of a method for their quantitative determination using high performance liquid chromatography. Materials and methods. The object of the study was alder buckthorn bark from different manufacturers. The work was performed on an Agilent 1100 liquid chromatograph complete with a G1311A four-solvent supply and degassing system, a G1315B diode array detector, a G1316A column thermostat, and a G1313A automatic sample injection device. Chromatographic analysis was carried out on a

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Rozprawy doktorskie na temat "Chromatographic Conditions"

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Nakamura, Koji. "Studies on High-performance Affinity Chromatography : Preparation of the Chromatographic Gels, Evaluation of the Chromatographic Conditions, and the Application to Purification of Enzymes." Kyoto University, 2004. http://hdl.handle.net/2433/148344.

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Salisbury, Rebecca Suzanne. "The graphical determination of operating conditions for chromatographic sequences." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1446080/.

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Multiple step chromatography sequences are necessary in biopharmaceutical downstream processing to achieve the desired levels of purity for products such as therapeutic proteins. Traditional methods of process design deal with each step individually, but this can result in a sequence that does not achieve best overall performance. This project proposes a graphical methodology for the identification of operating conditions for a two-step chromatography sequence. The method uses Windows of Operation to incorporate the tradeoffs between yield, purity, and productivity. A tie-line procedure is dev

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Nylander, Julia. "The dependence of chromatographic conditions for separation of oligonucleotides in different AEX-HPLC columns." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278851.

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Oligonucleotides (ONs) are widely used in different applications in life science, forensic, in i.e. family tree DNA test for humans and in diagnostic applications in several fields. The use of ONs in biopharmaceutical therapeutic areas also generates new challenges handling more complex molecules which results in the need of further developed analytical techniques. Anion exchange chromatography (AEX) is a common separation technique for biomolecules and is based on charge attraction between the analyte and the stationary phase. The chromatographic system is complex and often high pH and a high

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Frazer, Lewis. "The impact of various chromatographic conditions on the separation of modified and unmodified oligonucleotides." Thesis, Karlstads universitet, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-85275.

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In this study, the effects of certain chromatographic conditions on various modified and unmodified oligonucleotides were investigated. At the forefront of this study was the investigation of a new Ion-pair Reversed-phase liquid chromatography (IP-RPLC) method, that had the potential to replace a previously established triethylammonium acetate (TEAA) IP-RPLC method developed for oligonucleotide separations. This method, utilising the counter ion dibutyl amine (DBA) and a Tris-buffer at pH 8, produced promising results indicating that the strong binding strength of DBA creates a hybrid IEX/RPLC

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Grabowsky, Monika Elvira. "Two-dimensional chromatographic characterisation of PS-b-PEO copolymers at the critical conditions of their corresponding homopolymers." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17937.

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Thesis (MSc)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Block copolymers are very interesting materials but they are quite complex. During polymer synthesis only a certain amount of control can be enforced. As copolymers are made up of two or more different homopolymer segments, and therefore have different end group possibilities, varying block lengths and block sequences, they have complex structures and are therefore difficult to analyse. Different techniques exist by which polymers can be analysed to determine the aforementioned distributions. In order to achieve a complete

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Hmida, Dorra. "Recherche de conditions alternatives à l’utilisation de solvants chlorés en Chromatographie Liquide Non-Aqueuse à Polarité Inversée de Phases. Application à l’analyse des lipides présents dans les milieux complexes." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS189/document.

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Déterminer la composition en triacylglycérols des huiles végétales est un défi important à relever aussi bien en biologie végétale que dans le domaine médical ou celui de l’industrie agro-alimentaire. La chromatographie en phase liquide à polarité inversée de phases en milieu non aqueux (NARP-LC) est la méthode la plus utilisée, avec cependant une utilisation récurrente de solvants chlorés. Le premier objectif de ce travail a été de proposer des conditions analytiques alternatives n’utilisant pas de solvants chlorés. Pour ce faire, nous avons établi le diagramme de force éluante sur phases sta

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Rajendran, Arvind. "Adsorption and chromatography under supercritical conditions /." Zürich, 2004. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=15731.

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Ottiger, Stefan Pascal. "Competitive adsorption and chromatography at supercritical conditions /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17879.

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Fontaine, Mathilde. "Étude de l’évolution de la teneur en chrome hexavalent dans le cuir, influence des conditions de fabrication et importance des facteurs environnementaux." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1155/document.

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Actuellement, 80 à 85% des cuirs sont tannés au chrome. Ce procédé permet d'obtenir d'excellentes propriétés physico-mécaniques dans des conditions économiques optimales. Les sels de chrome sous forme trivalente utilisés lors de la fabrication du cuir ne sont pas nocifs; cependant sous certaines conditions et associés à d'autres substances, le chrome trivalent peut se transformer en chrome hexavalent, très allergisant et pouvant s'avérer dangereux pour la santé du consommateur. Depuis le 1er mai 2015, la présence de chrome hexavalent dans le cuir est soumise à la législation européenne; la ten

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Riviere, Philippe. "Optimisation des conditions d'élution en chromatographie en phase liquide." Lyon 1, 1993. http://www.theses.fr/1993LYO10193.

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Le but de ce travail est de developper une methode d'optimisation des phases mobiles multisolvants en regime d'elution isovatique, d'une part, et en regime de gradient d'elution lineaire ternaire, d'autre part. C'est une strategie generale d'optimisation: elle debute par l'etude de la faisabilite de la separation pour des melanges de phases mobiles ternaires et, eventuellement quaternaires. Les performances de cette methode ainsi que ces limites sont discutes dans ce travail et illustrees par differentes applications

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Książki na temat "Chromatographic Conditions"

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Jones, Gordon Rees, Joseph W. Spencer, and Anthony G. Deakin. Chromatic Monitoring of Complex Conditions. Taylor & Francis Group, 2008.

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Jones, Gordon Rees, Joseph W. Spencer, and Anthony G. Deakin. Chromatic Monitoring of Complex Conditions. Taylor & Francis Group, 2008.

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(Editor), Gordon Rees Jones, Anthony G. Deakin (Editor), and Joseph W. Spencer (Editor), eds. Chromatic Monitoring of Complex Conditions (Series in Sensors). Taylor & Francis, 2008.

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Chromatic monitoring of complex conditions. CRC Press, 2008.

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Leelasvatanakij, Leena. Comparison and optimization of chromatographic conditions for separation of cyclic dynorphin A analogues from linear byproducts. 1993.

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Rajendran, Arvind. Adsorption and chromatography under supercritical conditions. 2004.

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Berek, Dusan. Liquid Chromatography of Synthetic Polymers: Entropy/Enthalpy Compensation and Critical Conditions. Springer International Publishing AG, 2023.

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Części książek na temat "Chromatographic Conditions"

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Allmendinger, Richard, Spyridon Gerontas, Nigel J. Titchener-Hooker, and Suzanne S. Farid. "Tuning Evolutionary Multiobjective Optimization for Closed-Loop Estimation of Chromatographic Operating Conditions." In Parallel Problem Solving from Nature – PPSN XIII. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10762-2_73.

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Östergren, Karin, and Christian Trägårdh. "A Study of Permeability and Hydrodynamic Dispersion Under Conditions of Chromatographic Flow." In Separations for Biotechnology 2. Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0783-6_67.

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Carvalho, Rimenys J., and Thayana A. Cruz. "Microplate-Based Method for High-Throughput Screening (HTS) of Chromatographic Conditions Studies for Recombinant Protein Purification." In Methods in Molecular Biology. Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-7312-5_17.

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Deming, Stanley N., Julie G. Bower, and Keith D. Bower. "Multifactor Optimization of HPLC Conditions." In Advances in Chromatography. CRC Press, 2021. http://dx.doi.org/10.1201/9781003209973-2.

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Engewald, Werner, and Katja Dettmer-Wilde. "Selection of Capillary Columns and Operating Conditions." In Practical Gas Chromatography. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54640-2_4.

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Malik, Muhammad Imran, and Dusan Berek. "Liquid Chromatography Under Limiting Conditions." In Liquid Chromatography of Synthetic Polymers. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-34835-8_9.

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Malik, Muhammad Imran, and Dusan Berek. "Liquid Chromatography at Critical Conditions." In Liquid Chromatography of Synthetic Polymers. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-34835-8_8.

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Cretier, G., and J. L. Rocca. "Optimization of Injection Conditions in Preparative Liquid Chromatography." In Preparative-Scale Chromatography. CRC Press, 2021. http://dx.doi.org/10.1201/9781003210108-5.

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Hupe, Klaus-Peter, and Bernd Hoffmann. "Optimum Conditions in Preparative Liquid Chromatography. II. Selection of Column Dimensions." In Preparative-Scale Chromatography. CRC Press, 2021. http://dx.doi.org/10.1201/9781003210108-4.

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Hou, Jian-Min, Ting-Yun Kuang, De-Chuan Peng, Chong-Qin Tang, and Pei-Sung Tang. "Photoinduced Damage of the Photosystem II Primary Electron Donor P680: A High Performance Liquid Chromatographic Analysis of Pigment Content in D1/D2/Cytochrome B559 Complex Under Photoinhibitory Conditions." In Photosynthesis: Mechanisms and Effects. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-3953-3_494.

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Streszczenia konferencji na temat "Chromatographic Conditions"

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Lerbscher, John, Wellington Wamburi, and Joe Bojes. "Galvanic Probes: a Versatile Monitoring Technique to Detect Oxygen Ingress, pH Excursions and Other Events in Laboratory Studies." In CORROSION 2012. NACE International, 2012. https://doi.org/10.5006/c2012-01198.

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Abstract Oxygen ingress into process streams constructed from mild steel causes general and pitting corrosion rates to increase. Air ingress is often an intermittent event and real-time continuous monitoring for oxygen is required to help identify events where air ingress occurs. Gas chromatographic methods have been successfully used to detect oxygen in gas streams in the field; however, such methods are often too costly or impractical for most field applications. Galvanic probes are robust, cost effective and are particularly useful in detecting low levels of dissolved oxygen in aqueous-base

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Alghamdi, Talal M. "Determination of Corrosion Inhibitor Residuals in Dry Crude Oil." In CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-18769.

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Abstract In the absence of adequate volume of aqueous phase in crude sample, it is a challenge to determine the corrosion inhibitor residuals concentration by conventional techniques. This work aims to solve this problem by providing an analytical technique to measure the corrosion inhibitor residuals in dry crude oil by extracting corrosion inhibitor residuals from crude oil into a saline water, which could be then quantified by any analytical instrumental means. A method was developed for the extraction of corrosion inhibitor residuals from treated crude oil samples by saline water. The vari

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Andrew, B. E. "Monitoring of Microbiological Metabolites by Ion Chromatography." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88089.

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Abstract Ion chromatography is a useful analytical technique for obtaining quantitative data with respect to microbiological metabolites on surfaces and in bulk solution. Case histories include anaerobic degradation of nitrite in bulk solution and on steel surfaces, resulting in microbiologically induced corrosion. Aerobic degradation of nitrite in a cooling water system will illustrate the importance of selecting appropriate simulation conditions. Short-chain fatty acids in emulsion coolants are generated by microbiological action, and can contribute to product corrosion. These metabolites ar

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Kopera, Paulina, Anna Twarog, and Henryk Sechman. "STUDY OF CHANGES IN HYDROGEN CONCENTRATION IN SOIL GAS SAMPLES." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/4.1/s17.27.

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Hydrogen can originate from various geological processes and its ability to migrate to near-surface layers makes soil gas analysis crucial for identifying subsurface accumulations. Current methods using portable analysers are often insufficient for precise determination, highlighting the need for gas chromatography in controlled laboratory settings. Hydrogen's high mobility and chemical reactivity make it difficult to maintain stable soil gas samples from collection to analysis. To address this challenge, an experiment was conducted to assess the impact of storage time and conditions on hydrog

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Nagu, Muthukumar, Saroj K. Panda, and Nayef M. Alanazi. "Organic Amine Partitioning at Simulated Refinery Overhead Condition." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-13225.

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Abstract Organic amines, a neutralizer, are preferentially used over ammonia to minimize the amine hydrochloride induced corrosion in refinery overhead systems. The partition of active ingredients of the neutralizers to the hydrocarbon phase reduces the efficiency of neutralizing amines as the maximum amount of amines are required to be in the aqueous phase to deal with hydrochloric acid present in the system. Moreover, the partitioning of amines to the hydrocarbon phase can form corresponding amine chloride salts leading to the under deposit corrosion in the refinery units. In the present inv

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Prethaler, A., T. Vogl, G. Mori, et al. "Evaluation of Performance of Gas and Gas Condensate Inhibitors with a Laboratory Two Phase Flow." In CORROSION 2014. NACE International, 2014. https://doi.org/10.5006/c2014-4045.

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Abstract Three different inhibitors have been tested in a two-phase laboratory flow loop system with carbon steel tubes under conditions like they are very common in European gas wells with a gas-liquid ratio of 20,000.After a detailed description of the experimental setups, degradation rates of material API(1) L-80 as function of flow velocity and inhibitor dosing are presented. Inhibitor 1 was based on ethoxylated phosphate coco-amine salt dissolved in benzene, inhibitor 2 was an imidazoline dissolved in ethylene glycol with additions of hexamethylenediamine and thioglycolic acid. Inhibitor

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Hinman, Michael E., and Ilhan Ulkem. "Attempts for Preventing Hydrogen Embrittlement and Solving the Infrastructure Problems for Hydrogen Gas Transmission Lines - A Practical IGC Study Based on Surface Thermodynamics." In CONFERENCE 2024. AMPP, 2024. https://doi.org/10.5006/c2024-20697.

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Abstract This work summarizes the preliminary results of an effective experimental methodology called IGC, Inverse Gas Chromatography. IGC analysis is a well-established, surface thermodynamics technique. Different types of model coating materials have been tested under relatively identical conditions to determine their ability to interact with hydrogen gas. Findings helped establish a practical way of ranking materials with respect to their interaction with hydrogen. This potentially leads to their ability to protect the infrastructure by either reducing the chances for hydrogen to reach or e

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Lambrych, Kevin, Carl Gleditsch, and Michael Jaeger. "Permeation Effects on Fiber Reinforced Thermoset Plastics." In CORROSION 2006. NACE International, 2006. https://doi.org/10.5006/c2006-06540.

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Abstract This paper investigates the long-term performance of fiber reinforced thermoset plastic composites (FRP) in underground fuel storage tank (UGT) applications. For this study, isophthalic polyester resin based laminates are exposed to two discrete environments, Reference Fuel C and deionized water, simulating worst case conditions of a tank immersed in ground water. Five different laminate thicknesses are studied. The test apparatus has been constructed so that the two environments are separated by a laminate barrier. Dynamic Headspace Gas Chromatography is used to monitor the permeatio

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Romero, Fernando, William Siefert, Steven L. McCracken, and Boian Alexandrov. "Effect of Reheated CGHAZ Microstructure on Hydrogen-Induced Cracking Susceptibility in SA-508 Steel." In AM-EPRI 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0933.

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Abstract According to ASME Case N-888-3, Similar and Dissimilar Metal Welding Using Ambient Temperature SMAW or Machine GTAW Temper Bead Technique, a 48 hr waiting period before conducting the final nondestructive examination (NDE) is required when ferritic filler weld metal is used. The purpose of the 48 hr hold is to confirm the absence of hydrogen-induced cracking in the temper bead heat-affected zone. In previous research, the effect of post-weld heat treatment (PWHT) and temper bead welding (TBW) on the hydrogen-induced cracking (HIC) susceptibility in the coarse-grained heat-affected zon

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Son, Adelina J., and Jayant Chakravarty. "Analysis of Residual Corrosion Inhibitors by Fluorescence and Ultraviolet Spectrophotometry." In CORROSION 1996. NACE International, 1996. https://doi.org/10.5006/c1996-96344.

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Abstract The paper describes the development of a fully automated instrumental procedure for testing residual corrosion inhibitors in production waters in the field. Initial investigations were conducted in the laboratory to evaluate the suitability of ultraviolet and fluorescence spectrophotometric techniques to different types of corrosion inhibitors. Parameters for comparison included selectivity, sensitivity, speed, accuracy and precision of the methods under flowing conditions as in high performance liquid chromatography and static conditions as encountered in stand alone instruments. For

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Raporty organizacyjne na temat "Chromatographic Conditions"

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Daschbach, J., S. F. Simpson, J. M. Harris, M. Fleischmann, and S. Pons. The Behavior of Disk Electrodes. Optical Imaging of the Concentration Distribution Over a Disk Electrode under Galvanostatic Conditions Species Selective Gas Chromatographic Detectors. Defense Technical Information Center, 1988. http://dx.doi.org/10.21236/ada200840.

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Author, Unknown. PR-138-907-R01 Test Kit Manual Field Sampling and Analysis of Contaminant Ions on Pipe Surfaces. Pipeline Research Council International, Inc. (PRCI), 1995. http://dx.doi.org/10.55274/r0012142.

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This document contains instructions for the sampling of steel pipe surfaces for contaminant ions using electrolytic limpet cell extraction or direct contact extraction with chromatographic papers, and analytical test methods for chloride, sulfate, nitrate/nitrite, and ferrous iron ions. The electrolytic limpet cell sampling method is the preferred technique for the recovery of ion contaminants from all pipe surfaces. Contact paper sampling may be used when operating conditions make the use of electrolytic limpet cell sampling impractical or inconvenient. Examples of sampling and analysis data

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George and Hart. PR-015-06603-R02 Tests of Instruments for Measuring Hydrocarbon Dew Points in Natural Gas Streams Phase 2. Pipeline Research Council International, Inc. (PRCI), 2008. http://dx.doi.org/10.55274/r0010969.

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Research has assessed the accuracy of two commercially-available hydrocarbon dew point (HCDP) analyzers, an Ametek� Model 241 CE II and a Michell Condumax II. During a previous phase of this project, both automated analyzers, along with a Bureau of Mines chilled mirror device serving as a reference, were tested on gravimetrically-prepared gas blends chosen to simulate a transmission-quality gas and a production gas. The measurement repeatability of both units was found to be better than the manual chilled mirror. Trends in the analyzer and manual chilled mirror measurements suggested that diff

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Peterson, Warren. PR-663-19600-Z01 Develop Guidance for Calculation of HCDP in Pipelines. Pipeline Research Council International, Inc. (PRCI), 2020. http://dx.doi.org/10.55274/r0011659.

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To maintain the integrity and reliability of natural gas transportation systems, system operators ensure that products in transit remain in the gas phase under foreseeable operating conditions. Compliance with pipeline hydrocarbon dew point (HCDP) specifications are demonstrated though in-situ testing or predictive models based on Equations of State (EOS) calculations. Numerical prediction of HCDP is a product of contributing elements, including gas chromatography, calibration gas quality, thermophysical science and the experimental data that underpins equations of state. Some hydrocarbon mixt

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Kelner, Britton, and Sparks. L51986 Natural Gas Sample Collection and Handling Phase II Simulated Field Conditions. Pipeline Research Council International, Inc. (PRCI), 2003. http://dx.doi.org/10.55274/r0011157.

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Phase II was originally planned as a series of field tests to confirm the results of the sampling methods performance tests conducted during Phase I. However, the API Chapter 14.1 Gas Sampling Research Working Group chose to have the tests conducted at a newly developed wet gas test facility located at the Colorado Engineering Experiment Station (CEESI), in Nunn, Colorado. Three general tests were conducted. Test Plan I was intended to investigate the effects of sample point location on on-line gas chromatograph (GC) analyses and on spot sampling methods. Test Plan II was intended to investiga

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นุชประยูร, อิศรางค์. การศึกษาโปรตีนที่สำคัญในพิษงูแมวเซาเพื่อนำมาดัดแปลงใช้ประโยชน์ทางการแพทย์ : รายงานการวิจัยฉบับสมบูรณ์. จุฬาลงกรณ์มหาวิทยาลัย, 2008. https://doi.org/10.58837/chula.res.2008.26.

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ปัญหางูพิษกัดเป็นปัญหาทางสาธารณสุขที่สำคัญของประเทศไทย หนึ่งในงูพิษที่สำคัญในไทยคือ งูแมวเซา (Daboia russellii siamensis) งูชนิดนี้พบมากในแถบภาคกลางและภาคตะวันออกของไทย ผู้ที่ถูกงูชนิดนี้กัด มักมีอาการทางระบบเลือด และภาวะไตวายเฉียบพลัน ซึ่งเป็นสาเหตุสำคัญที่ทำให้ผู้ที่ถูกงูแมวเซากัดเสียชีวิต ในปัจจุบันความรู้เกี่ยวกับกลไกการเกิดพิษหลังถูกงูแมวเซากัด รวมทั้งโปรตีนสำคัญในพิษงูแมวเซาที่อาจมีประโยชน์ทางการแพทย์ ยังไม่มีการศึกษาอย่างแน่ชัด การศึกษาองค์ประกอบของพิษงูแมวเซาในเชิงลึก จะช่วยให้เข้าใจกลไกการเกิดพิษ นำไปสู่การรักษาที่มีประสิทธิภาพที่ดีขึ้น พร้อมทั้งอาจนำความรู้ที่ได้ไปใช้ประโยชน์ในทางการ

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Olsen, Daniel, and Brenna King. PR-179-18203-R01 Experimental Evaluation of Stack Testing Methods for Accurate VOC Measurement. Pipeline Research Council International, Inc. (PRCI), 2020. http://dx.doi.org/10.55274/r0011654.

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Volatile organic compounds (VOCs) are defined as non-methane, non-ethane hydrocarbons and have negative environmental effects, especially in the formation of ozone that creates smog. The combination of a gas chromatograph and a flame ionization detector can be implemented to quantify VOCs in engine exhaust following EPA Method 18/25A. The Fourier Transform Infrared Spectrometer can also be used to quantify VOCs in engine exhaust gas, following EPA Method 320. In this work testing and data analysis are performed with both measurement methods on multiple analyzers utilizing different engine type

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Horton, David, Victoria Soroker, Peter Landolt, and Anat Zada Byers. Characterization and Chemistry of Sexual Communication in Two Psyllid Pests of Pears (Homoptera: Psyllidae). United States Department of Agriculture, 2011. http://dx.doi.org/10.32747/2011.7592653.bard.

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Pear-feeding psyllids in the genus Cacopsylla (Hemiptera: Psyllidae) are among the most important arthropod pests of pears worldwide. These pests are exceedingly difficult to control, and new management tools are needed. Sex attractantpheromones have been used in IPM programs for pests of pome fruits (especially Lepidoptera), but not as yet for pest Hemiptera. Results of the current project showed that males of two psyllid pests of pears, Cacopsylla bidens (Israel) and Cacopsylla pyricola (North America), use volatile or semi-volatile compounds to locate female psyllids for mating. For both sp

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Fluhr, Robert, and Maor Bar-Peled. Novel Lectin Controls Wound-responses in Arabidopsis. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7697123.bard.

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Innate immune responses in animals and plants involve receptors that recognize microbe-associated molecules. In plants, one set of this defense system is characterized by large families of TIR–nucleotide binding site–leucine-rich repeat (TIR-NBS-LRR) resistance genes. The direct interaction between plant proteins harboring the TIR domain with proteins that transmit and facilitate a signaling pathway has yet to be shown. The Arabidopsis genome encodes TIR-domain containing genes that lack NBS and LRR whose functions are unknown. Here we investigated the functional role of such protein, TLW1 (TI

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Chutimaworapan, Suchada, Chaiyo Chaichantippayuth, and Areerat Laopaksa. Formulation of pharmaceutical products of Garcinia mangostana Linn. extracts. Chulalongkorn University, 2006. https://doi.org/10.58837/chula.res.2006.32.

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Part I: The purpose of the investigation was to develop the extraction process that was simple, practical and giving high yield. The maceration of dried powder of Garcinia mangostana fruit husk with ethyl acetate gave yellow crystalline powder of mangostin. The yield was calculated as 7.47%. The identification of the Garcinia mangostanahusk extract was carried out by thin-layer chromatography (TLC) and differential scanning calorimetry. The TLC of mangostin was done by using the alumina sheet and ethyl acetate: hexane (3:1) as mobile phase. The Rf value as compared with standard mangostin was

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