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Showing 1 to 20 of 76 for “"SFC"”.
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Analysis of Alcohol and Alkylphenol Polyethers via Packed Column Supercritical Fluid Chromatography
… utilizing supercritical fluid chromatography (SFC) under mild instrument operating conditions. The aryl group present in APEOs allowed ultraviolet (UV) detection, with an equal molar response for oligomers, allowing average molar oligomer values to be calculated. APEOs were separated by …
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Analysis of Electric Disturbances from the Static Frequency Converter of a Pumped Storage Station
… the operation of a static frequency converter (SFC). The SFC is used for starting the synchronous machines at the station when in the pump mode. During the starting process several equipment is connected to the SFC being possible to get affected by the disturbances generated. These disturbances …
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Supercritical Fluid Chromatography with Chemiluminescent Nitrogen and Sulfur Detection
… detectors in supercritical fluid chromatography (SFC) is particularly evident since SFC can be used to analyze classes of compounds that are not readily amenable to either gas chromatography (GC) or liquid chromatography (LC). These compounds include species that are nonvolatile or thermally …
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The feeding value of Kenyan sorghum, sunflower seed cake and sesame seed cake for poultry
… of Kenyan sorghum, sunflower seed cake (SFC) and sesame seedcake (SSC) as feed ingredients in poultry diets was evaluated at the University of Nairobi, Kenya. A survey of Kenyan sorghum revealed a large variation in the composition of the grains grown. Local sorghum varieties tended to …
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Development of real-time process control systems using formal techniques
… formalism called Sequential Function Chart (SFC), a variant of Grafcet, is examined. SFC, which is defined in the international standard IEC1131 as a graphical description language, has been used widely in industry and has achieved an acceptable level of maturity and acceptance. A comparative …
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Characterization and optimization of supercritical fluid chromatography with on-line Fourier transform infrared detection
Supercritical fluid chromatography (SFC) has been gaining much exposure over recent years. The characteristics inherent to SFC give it capabilities in separating nonvolatile, thermally labile compounds inseparable by GC, and with greater efficiency per unit time than HPLC. As in the past with the …
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Localized or diffuse: a volumetric investigation of the relation between prefrontal cortical regions and the habitual engagement of cognitive reappraisal
… cortex (MFC) and left superior frontal cortex (SFC), and specific engagement of the right SFC. However, previous volumetric studies have not identified clear associations between reappraisal and these regions. This discrepancy between functional and structural studies suggests that the broad …
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The effect of iron metabolism on palmitate-induced INS-1 cell death
… TCA cycle intermediate. 64 B. Role of SFA and SFC in various of cell death models. 71 C. The effect of aconitase inhibition on PA-induced lipotoxicity 76 D. SFC altered iron-regulating proteins. 84 E. Changes in intracellular signaling associated with SFC treatment. 88 F. Changes in oxygen …
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INHIBITORY CONTROL AND ITS RELATION TO PERSONALITY/TEMPERAMENT, EXECUTIVE FUNCTION, AND THE BRAIN
… control and the superior frontal cortex (SFC) and orbital frontal cortex (OFC) volumes. In order to assess subareas of the OFC and SFC, an innovative parcellation method was used. Results suggested that the temperament and executive function measures of inhibitory control did form a single …
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Supercritical fluid chromatography - mass spectrometry
… such as supercritical fluid<br/>chromatography (SFC), are now being considered. The key advantage of SFC is minimal<br/>solvent waste, which is particularly important in preparative SFC, leading to fast sample<br/>recovery. Hence it is important to explore whether SFC, which promises to be …
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The evaluation of an argon and helium highly efficient microwave induced plasma as an element selective detector for packed column super critical fluid chromatography
… Recently, supercritical fluid chromatography (SFC) has gained popularity among the research community partially because SFC is much more tolerant of polar functional groups than is gas chromatorgraphy (GC). SFC can be used in applications where derivatization is not possible due to sample …
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Applications of supercritical fluids to the extraction and analysis of oligomers and polymer additives
… for both extraction (SFE) and chromatography (SFC). A particularly exciting area of applications has been in the field of polymeric materials. Since polymers are not discrete molecules, but, rather broad distributions of very similar compounds (oligomers), they can pose interesting challenges …
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Design and Implementation of Scalable High-Performance Network Functions
Service Function Chaining (SFC) enriches the network functionalities to fulfill the increasing demand of value-added services. By leveraging SDN and NFV for SFC, it becomes possible to meet the demand fluctuation and construct a dynamic SFc. However, the integration of SDN with NFV requires packet …
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Applications of supercritical fluid technologies to the analysis of food components
… analyzed by supercritical fluid chromatography (SFC) with flame ionization detection (FID), Fourier-transform infrared (FT-IR) detection, and mass spectrometry (MS) detection. Although reports in the literature indicated that only one derivatized component was detected under GC conditions, the …
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Investigation of mass spectrometric interfaces for supercritical fluid chromatography and liquid chromatography
… coupled to supercritical fluid chromatography (SFC) and mass spectrometry (MS) were assessed with pure and methanol-modified CO₂. Factors which affect the nebulization and the subsequent desolvation of the droplets were assessed. The quantitative performance was evaluated yielding a limit of …
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Impact of modified carbon dioxide mobile phases on detection on packed-column supercritical fluid chromatography
… of supercritical fluid chromatography (SFC) and supercritical fluid extraction (SFE) which utilize supercritical fluids (SF) as the mobile phase are being realized by the scientific community. SF are more advantageous than traditionally used organic solvents because SF exhibits the …
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Novel Switchable Stationary Phase Methods For Supercritical Fluid Chromatography
… fluid chromatography-flame ionization detection (SFC-FID) system employing a modified water stationary phase was investigated for the analysis of organic bases. The method uses a stainless steel capillary column coated with water containing NH4OH, which was also used to hydrate the system. In this …
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Hyphenated fourier transform infrared spectrometry: techniques for separations and analysis
… (SFE), supercritical fluid chromatography (SFC), and liquid chromatography (LC). Three studies are presented. The first involves the application of SFE/FT-IR towards the extraction of finishes from textile fibers. SFE has previously been applied to less complex finish systems. The proposed …
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Quantitative Analysis of Additives in Low Density Polyethylene Using On-line Supercritical Fluid Extraction /Supercritical Fluid Chromatography
… (SFE)/Supercritical Fluid Chromatography (SFC) system was assembled to provide efficient extraction and separation of polymer additives with quantitative results. The effects of various SFE/SFC parameters, such as trapping temperature, injection temperature, extraction pressure and …
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Supercritical fluid extraction/chromatography and Fourier transform infrared spectrometry: methods optimization and applications
… for supercritical fluid chromatography (SFC) and Fourier transform infrared spectrometry (FT-IR). In order to study the effects of a supercritical mobile phase on the resulting IR spectra, carbon dioxide was compared to xenon as a supercritical fluid mobile phase for flow cell SFC/FT-IR. …
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