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Showing 1 to 20 of 36 for “"SFG"”.
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A Study of Molecular Orientation at Neat Liquid-Mica Interface by Sum Frequency Generation (SFG) Spectroscopy
… generation vibrational spectroscopy. Through SFG simulation orientation analysis, it showed that the imidazole ring of ionic liquids, [BMIM][BF4], [BMIM][Tf2N], [BMIM][DCA], and [BMIM][SCN] were almost orientated nearly parallel to the mica surface with their butyl chain toward liquids. The …
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Establecimiento del sistema de seguridad de información en SFG bajo los estándares de la norma ISO 27001: 2005
Se presentan en este trabajo el desarrollo de un marco conceptual y metodológico para la etapa de establecimiento de un sistema de gestión de seguridad de información bajo la perspectiva de las prácticas sugeridas por el estándar ISO 27001:2005 en una empresa de base tecnológica emergente. Se …
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Identification and Characterization of a Relish-type NF-kB, DvRelish in Dermacentor variabilis, the American Dog Tick
… and non-pathogenic Spotted fever group (SFG) Rickettsia are maintained and transmitted by ticks with specific hard tick-Rickettsia pairings evident in nature. The pathogenic SFG Rickettsia rickettsii is transmitted by the hard tick Dermacentor variabilis. In response to infection, D. …
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Structural Characterization of Thin Films of Molecules on Solid Surfaces: Development of a Portable UHV Chamber to Bridge RHEED and SFG Spectroscopy Techniques
… (RHEED) and sum-frequency generation (SFG) spectroscopy techniques, which include thin films of ionic liquids (ILs) deposited by physical vapor deposition and self-assembled monolayers on gold. A thickness-dependent structural transition of ILs on highly-oriented pyrolytic graphite …
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Laserspektroskopische Untersuchungen zur Adsorption und Reaktion von CO auf katalytisch aktiven Oberflächen
… wurde die optische Summenfrequenz-Spektroskopie (SFG) verwendet, um ausgehend von einer Kalibrierung der CO SFG-Spektren gegen die absolute Oberflächenbedeckung mittels kombinierter TPD-, LEED- und SFG-Messungen sowie kinetischer Modellrechnungen die CO-Adsorption auf Pt(111)-, Rh(111)- und …
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Electrochemical and spectroscopic interfacial investigations of small organic molecule electrooxidation on platinum electrodes
… sum frequency generation spectroscopy (BB-SFG). In situ BB-SFG allows for the chemical analysis of electrode surfaces to examine details of surface electrochemical reactions. SFG is based on a second order nonlinear optical process that is forbidden in centrosymmetric media. Therefore, SFG …
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Nanosecond pulse discharges in electronegative gases
Experiments have been conducted using C^Fn-Ar and SFg-N^ mixtures as f i l l i ng gases in a uniform-field spark gap subjected to highly overvolted nanosecond pulses. The electrode separation is 1 cm. U.V. radiation is applied prior to the arrival of the pulse to the gap. In C2Fg-Ar mixtures the …
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Using Vibrational Laser Spectroscopy to Study Biologically Relevant Interfaces
… spectroscopy and sum-frequency generation (SFG) spectroscopy are explored in detail for their innate ability to unravel the complexities of biological interfaces. The benefits of both techniques are demonstrated through applications to a variety of different interfaces, ranging from whole …
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Investigation of Electrode Processes and Double Layer Structure Using Visible/infrared Sum Frequency Generation
… single crystal Ag azimuthal rotation on resonant SFG signal line shapes is examined using broad band multiplex SFG. Detailed fitting analysis of acquired spectra is used to extract data as a function of azimuthal rotation angle. Magnitude of non-resonant background, relative phase of vibrational …
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Structural and kinetic studies of surfactant and phospholipid monolayers at the air/liquid interface using sum-frequency generation spectroscopy
… optical technique of sum-frequency spectroscopy (SFG) has been used to investigate a variety of surfactant and phospholipid systems at different interfaces. Firstly, the effects of temperature and ionic strength on the adsorption of cationic and non-ionic surfactants were investigated. The binary …
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In-situ spectroelectrochemical surface studies of fundamental fuel cell catalysis
… and broadband sum frequency generation (BB-SFG) vibrational spectroscopy have been applied to a variety of fuel cell relevant systems. Primarily, ethanol oxidation was studied due to the potential of ethanol as an easily-transported and manufactured fuel with a higher molecular energy …
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Spectroscopic Study of Compressible Mobile Phase and Stationary Phase Behavior in Chromatography
… fluorescence, and sum-frequency generation (SFG) spectroscopy are used to investigate the behavior of compressible mobile phases and stationary phases under a variety of chromatographic conditions. Efforts to understand and optimize separations employing compressible mobile phases have been …
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Sexual Fluidity And Women's Bisexual Identity Development
… in attractions, the Sexual Fluidity Grid (SFG) and a measure of sexual orientation, the Klein Sexual Orientation Grid; the relationship between varying levels of sexual orientation and negative sexual identity on the Lesbian, Gay, and Bisexual Identity Development scale (LGBIS); the …
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Three dimensional vibrational spectroscopy and shock initiation of hmx
… done, but there was still no events observed by SFG that were clearly attributable to HMX initiation. No broadening or new peaks were observed at all, and no significant loss of SFG intensity occurred besides the expected loss from the destruction of the aluminum substrate. It is possible that a …
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Interrogating the Electrochemical Interface Using Sum Frequency Generation Spectroscopy
SFG in tandem with electrochemical capacitance and CV measurements are used to study the effects of applied potential on the adsorption and orientation of PABA at a Ag(111) surface. The data indicates that PABA changes orientation in response to the charge on the electrode surface, orienting one …
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Characterization of rickettsial infection dynamics within Dermacentor variabilis and Amblyomma maculatum
Spotted fever group (SFG) Rickettsia are primarily associated with their reservoir host and vector, the tick. Rickettsial colonization and maintenance within the arthropod is a key component of vector competence and pathogen transmission to the mammalian host. Contemporary detection of novel tick …
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The tick response to Rickettsial dissemination during typical and atypical Rickettsial infection
… only disease vectors for spotted fever group (SFG) Rickettsia which are obligate intracellular bacteria belonging to the genus Rickettsia. In nature, ticks maintain the infection of SFG Rickettsia via vertical and horizontal transmission. However, the prevalence of rickettsial transmission is …
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Shock compression and flash-heating of molecular adsorbates on the picosecond time scale
… multiplex vibrational sum-frequency generation (SFG) with nonresonant suppression was employed to monitor vibrational transitions of molecular adsorbates on metallic substrates during laser-driven shock compression and flash-heating. Adsorbates were in the form of well-ordered self-assembled …
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A corpus-trained parser for systemic-functional syntax
… for this purpose is systemic functional grammar (SFG), despite the fact that it is traditionally used for natural language generation. The parser will use a probabilistic systemic functional syntax (Fawcett 1981, Souter 1990), which was originally employed to hand-parse the Polytechnic of Wales …
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Sum Frequency Generation Spectroscopy of Imidazolium-based Ionic Liquids with Cyano-functionalized Anions at Gas-Liquid and Solid-Liquid Interfaces
… technique, sum frequency generation (SFG) spectroscopy, in combination with bulk-sensitive vibrational spectroscopic techniques such as FTIR and Raman, have been used in this report to characterize the surface of cyano-containing ILs, such as [BMIM][SCN], [BMIM][DCA], [BMIM][TCM], and …
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