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Journal articles on the topic 'Analyse GCxGC'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Hamilton, J. F., P. J. Webb, A. C. Lewis, J. R. Hopkins, S. Smith, and P. Davy. "Partially oxidised organic components in urban aerosol using GCXGC-TOF/MS." Atmospheric Chemistry and Physics 4, no. 5 (2004): 1279–90. http://dx.doi.org/10.5194/acp-4-1279-2004.

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Abstract. Partially oxidised organic compounds associated with PM2.5 aerosol collected in London, England, have been analysed using direct thermal desorption coupled to comprehensive gas chromatography-time of flight mass spectrometry (GCXGC-TOF/MS). Over 10000 individual organic components were isolated from around 10µg of aerosol material in a single procedure and with no sample pre-treatment. Chemical functionalities observed using this analytical technique ranged from alkanes to poly-oxygenated species. The chemical band structures commonly used in GCXGC for group type identifications over

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2

Hamilton, J., P. Webb, A. Lewis, J. Hopkins, S. Smith, and P. Davy. "Partially oxidised organic components in urban aerosol using GCXGC-TOF/MS." Atmospheric Chemistry and Physics Discussions 4, no. 2 (2004): 1393–423. http://dx.doi.org/10.5194/acpd-4-1393-2004.

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Abstract. Partially oxidised organic compounds associated with PM2.5 aerosol collected in London, England, have been analysed using direct thermal desorption coupled to comprehensive gas chromatography-time of flight mass spectrometry (GCXGC-OF/MS). Over 10 000 individual organic components were isolated from around 10 μg of aerosol material in a single procedure and with no sample pre-treatment. Chemical functionalities observed using this analytical technique ranged from alkanes to poly-oxygenated species. The chemical band structures commonly used in GCXGC for group type identifications ove

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3

Welthagen, W., J. Schnelle-Kreis, and R. Zimmermann. "Group classification method for pm 2.5 aerosols analysed with Comprehensive two-dimensional gas chromatography (GCxGC TOF MS)." Journal of Aerosol Science 35 (July 2004): 17–28. http://dx.doi.org/10.1016/j.jaerosci.2004.06.009.

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4

Bassen, Alexander, Maik Kleinschmidt, and Christine Zöllner. "Corporate governance of German growth companies. Empirical analysis of the corporate governance quality and the structure of supervisory boards of companies listed on TEC-DAX." Corporate Ownership and Control 3, no. 3 (2006): 128–37. http://dx.doi.org/10.22495/cocv3i3p10.

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This article analyses the importance of corporate governance for growth companies, derives specific requirements for them and evaluates the corporate governance quality for companies listed on TecDax. Growth companies’ characteristics imply a comparatively high importance of corporate governance due to a high level of business and agency risk. Several corporate governance elements are therefore particularly important for growth companies. Overall, the empirical results imply a high conformity of the Tec-Dax companies with the GCGC criteria with some exceptions for specific companies and criter

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Koch, Rosemarie. "Compliance and transparency of German supervisory board compensation." Corporate Ownership and Control 8, no. 3 (2011): 94–107. http://dx.doi.org/10.22495/cocv8i3p8.

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Due to some new developments in the German Corporate Governance Codex (GCGC) as well as the introduction of new laws several aspects of the supervisory board compensation are subject to change. In a first step we analyze the size and structure of DAX 30 companies’ supervisory board compensation. One novelty of the article is that we perform this analysis on a person specific level instead of relying on firm level data. In a second step, we examine how well DAX 30 firms comply with the GCGC on supervisory board compensation both with regard to the recommended structure and with regard to the re

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6

Costa, R., C. Fanali, G. Pennazza, et al. "Screening of volatile compounds composition of white truffle during storage by GCxGC-(FID/MS) and gas sensor array analyses." LWT - Food Science and Technology 60, no. 2 (2015): 905–13. http://dx.doi.org/10.1016/j.lwt.2014.09.054.

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7

Evzikov, G. Yu, М. G. Bashlachev, and A. V. Farafontov. "Ganglion cyst of Guyon’s canal as a rare cause of compression neuropathy of the ulnar nerve (literature review and case report)." Russian journal of neurosurgery 20, no. 2 (2018): 59–65. http://dx.doi.org/10.17650/1683-3295-2018-20-2-59-65.

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The study objectiveis to analyze the existing research literature devoted to this problem and to assess clinical characteristics and specific features of the diagnosis and rational neurosurgical treatment for ganglion cyst of Guyon’s canal (GCGC) that caused compression neuropathy of the ulnar nerve.Materials and methods.Since 1955, researchers reported only 19 cases of ganglion cysts located in the wrist area and associated with tunnel neuropathy of the ulnar nerve. Since this condition is extremely rare, we present our own clinical observations.Results.Using the literature data, we described

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8

Byliński, Hubert, Jacek Gębicki, and Jacek Namieśnik. "Evaluation of Health Hazard Due to Emission of Volatile Organic Compounds from Various Processing Units of Wastewater Treatment Plant." International Journal of Environmental Research and Public Health 16, no. 10 (2019): 1712. http://dx.doi.org/10.3390/ijerph16101712.

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The paper describes an attempt at health risk assessment and odour concentration determination in the most important units of a wastewater treatment plant. The cancer risk (CR) and hazard index (HI) parameters in selected measurement locations were calculated based on the results of chromatographic analyses (GCxGC-TOF-MS) and the United States Environmental Protection Agency (US EPA) guidelines. No exceedance of the CR and HI acceptable levels was observed for identified and quantitatively determined compounds from the VOCs group. The acceptable level was exceeded for the summary HI parameter.

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9

Knoll, Kirsten E., Zander Lindeque, Adetomiwa A. Adeniji, Carel B. Oosthuizen, Namrita Lall, and Du Toit Loots. "Elucidating the Antimycobacterial Mechanism of Action of Decoquinate Derivative RMB041 Using Metabolomics." Antibiotics 10, no. 6 (2021): 693. http://dx.doi.org/10.3390/antibiotics10060693.

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Tuberculosis (TB), caused by Mycobacterium tuberculosis (Mtb), still remains one of the leading causes of death from a single infectious agent worldwide. The high prevalence of this disease is mostly ascribed to the rapid development of drug resistance to the current anti-TB drugs, exacerbated by lack of patient adherence due to drug toxicity. The aforementioned highlights the urgent need for new anti-TB compounds with different antimycobacterial mechanisms of action to those currently being used. An N-alkyl quinolone; decoquinate derivative RMB041, has recently shown promising antimicrobial a

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10

Zdarta, Agata, Wojciech Smułek, Amanda Pacholak, Beata Dudzińska-Bajorek, and Ewa Kaczorek. "Surfactant addition in diesel oil degradation – how can it help the microbes?" Journal of Environmental Health Science and Engineering 18, no. 2 (2020): 677–86. http://dx.doi.org/10.1007/s40201-020-00494-9.

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Abstract Purpose Despite wide research on bioremediation of hydrocarbon-contaminated soil, the mechanisms of surfactant-enhanced bioavailability of the contaminants are still unclear. The presented study was focused on the in-depth description of relationships between hydrocarbons, bacteria, and surfactants. In order to that, the biodegradation experiments and cell viability measurements were conducted, and the properties of cell surface were characterized. Methods MTT assay was employed to measure plant extracts toxicity to microbes. Then, membrane permeability changes were evaluated, followe

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11

Saxton, J. E., A. C. Lewis, J. H. Kettlewell, et al. "Isoprene and monoterpene measurements in a secondary forest in northern Benin." Atmospheric Chemistry and Physics 7, no. 15 (2007): 4095–106. http://dx.doi.org/10.5194/acp-7-4095-2007.

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Abstract. The biogenic volatile organic compound (BVOC) composition of ambient air at a rural field site near Djougou, Benin has been studied as part of the AMMA (African Monsoon Multidisciplinary Analysis) project. Ambient air was sampled during day and night during the period 2 June 2006 to 13 June 2006. Gas samples from within the forest canopy and from branch and cuvette enclosure systems for four vegetation species were also obtained and emissions flux estimates made. All samples were analysed for the presence of isoprene, monoterpenes and sesquiterpenes by either gas chromatography-time

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12

Saxton, J. E., A. C. Lewis, J. H. Kettlewell, et al. "Isoprene and monoterpene emissions from secondary forest in northern Benin." Atmospheric Chemistry and Physics Discussions 7, no. 2 (2007): 4981–5012. http://dx.doi.org/10.5194/acpd-7-4981-2007.

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Abstract. The biogenic volatile organic compound (BVOC) composition of ambient air at a rural field site near Djougou, Benin has been studied as part of the AMMA (African Monsoon Multidisciplinary Analysis) project. Ambient air was sampled during day and night during the period 2 June 2006 to 13 June 2006. Gas samples from within the forest canopy and from branch and cuvette enclosure systems for four vegetation species were also obtained and emissions flux estimates made. All samples were analysed for the presence of isoprene, monoterpenes and sesquiterpenes by either gas chromatography-time

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13

Loots, Du Toit. "An Altered Mycobacterium tuberculosis Metabolome Induced bykatGMutations Resulting in Isoniazid Resistance." Antimicrobial Agents and Chemotherapy 58, no. 4 (2014): 2144–49. http://dx.doi.org/10.1128/aac.02344-13.

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ABSTRACTThe most common form of drug resistance found in tuberculosis (TB)-positive clinical samples is monoresistance to isoniazid. Various genomics and proteomics studies to date have investigated this phenomenon; however, the exact mechanisms relating to how this occurs, as well as the implications of this on the TB-causing organisms function and structure, are only partly understood. Considering this, we followed a metabolomics research approach to identify potential new metabolic pathways and metabolite markers, which when interpreted in context would give a holistic explanation for many

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14

Dilger, Alexander, and Ute Schottmüller-Einwag. "Corporate governance reporting: Compliance with upper limits for severance payments to members of executive boards in Germany." Corporate Law and Governance Review 2, no. 2 (2020): 18–32. http://dx.doi.org/10.22495/clgrv2i2p2.

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We examine how corporate governance reporting corresponds to actual conduct regarding severance payment caps for prematurely departing members of executive boards in Germany. Firstly, we evaluate the declarations of conformity for all companies listed in the CDAX between 2010 and 2014, which we use to determine conformity and deviation rates, and analyse the reasons for deviation, contributing to current research on comparative corporate governance, which focuses on when, why and how companies deviate from legitimate corporate governance goals (Aguilera, Judge, & Terjesen, 2018). Secondly,

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15

Ballester, Maria, Armand Sánchez та Josep M. Folch. "Polymorphisms in the goat β-lactoglobulin gene". Journal of Dairy Research 72, № 3 (2005): 379–84. http://dx.doi.org/10.1017/s0022029905000981.

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β-lactoglobulin polymorphisms have been reported in the milk of different goat breeds, although no genetic variants affecting the protein have been characterized. In the present study, we amplified and sequenced the proximal promoter and the first six exons containing the entire coding region for the β-lactoglobulin gene in eleven goat breeds from Spain, France, Italy, Switzerland, Senegal and Asia to identify genetic variants. Fifteen polymorphisms were detected, nine in the promoter region and six in the exons of the β-lactoglobulin gene. All polymorphisms were single nucleotide substitution

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16

Paschen, Wulf, Justina Schmitt, and Akira Uto. "RNA Editing of Glutamate Receptor Subunits GluR2, GluR5, and GluR6 in Transient Cerebral Ischemia in the Rat." Journal of Cerebral Blood Flow & Metabolism 16, no. 4 (1996): 548–56. http://dx.doi.org/10.1097/00004647-199607000-00004.

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The mechanisms of ischemic cell damage are still not fully understood. It has been shown that alpha-amino-3-hydroxy-5-methyl-isoxazole-4-propionate (AMPA)/kainate receptor antagonists, such as 6-nitro-7-sulphamoyl-benzo-(f)-quinoxaline-2,3-dione (NBQX), are neuroprotective in models of transient forebrain ischemia, even when applied during recovery, indicating that nonNMDA receptors may play a pivotal role in ischemic cell damage. In the present series of experiments, we studied whether transient cerebral ischemia causes changes in the extent of mRNA editing of AMPA/kainate receptor subunits,

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17

Partington, Roy, Jay Clarkson, James Paterson, Kay Sullivan, and Jon Wilson. "Quantitative carbon distribution analysis of hydrocarbons, alcohols and carboxylic acids in a Fischer-Tropsch product from a Co/TiO2 catalyst during gas phase pilot plant operation." Journal of Analytical Science and Technology 11, no. 1 (2020). http://dx.doi.org/10.1186/s40543-020-00235-5.

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Abstract Comprehensive two-dimensional gas chromatography (GCxGC) analysis for 1-alcohols and gas chromatography–mass spectrometry (GC-MS) analysis for carboxylic acids, derivatised as their methyl esters, have been applied to liquid and wax Fischer-Tropsch (FT) hydrocarbon products. These methods in combination with conventional one-dimensional gas chromatography (GC) analysis of the aqueous, gaseous, liquid hydrocarbon and wax products plus conventional high-performance liquid chromatography (HPLC) analysis of the aqueous phase has allowed a quantitative distribution analysis of FT hydrocarb

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