Surface Infrared Spectroscopy

Knutson, K.; Lyman, Donald J.

doi:10.1007/978-1-4684-8610-0_6

Cited by 23 publications

(11 citation statements)

References 90 publications

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“…Absorption occurs when the bond vibrational frequency matches that of the infrared radiation. The vibration pattern is unique for a given molecule [106][107][108].…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Characterization of Agricultural and Food Processing Residues for Potential Rubber Filler Applications

Barrera

Cornish

2019

J. Compos. Sci.

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Large volumes of agricultural and food processing residues are generated daily around the world. Despite the various potential uses reported for this biomass, most are still treated as waste that requires disposal and negatively impacts the environmental footprint of the primary production process. Increasing attention has been paid toward the use of these residues as alternative fillers for rubber and other large-scale commodity polymers to reduce dependence on petroleum. Nevertheless, characterization of these alternative fillers is required to define compatibility with the specific polymer, identify filler limitations, understand the properties of the resulting composites, and modify the materials to enable the engineering of composites to exploit all the potential advantages of these residue-derived fillers.

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“…Absorption occurs when the bond vibrational frequency matches that of the infrared radiation. The vibration pattern is unique for a given molecule [106][107][108].…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Characterization of Agricultural and Food Processing Residues for Potential Rubber Filler Applications

Barrera

Cornish

2019

J. Compos. Sci.

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“…The penetration depth, d p , can be calculated from the incident angle of the internal reflections and the relative refractive index at the interface for a particular wavenumber (Knutzen & Lyman, 1985). Equation 1 employs the absorbance of water in the transmission and ATR modes as a normalization factor.…”

Section: Estimation Of Surface Coveragementioning

confidence: 99%

Adhesive extracellular polymers ofhyphomonasMHS‐3: Interaction of polysaccharides and proteins

et al. 1995

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The adsorption behavior of extracellular polymeric substances (EPS) from the marine bacterium Hyphomonas MHS-3 was investigated using attenuated total reflection Fourier transform infrared (ATR/FT-IR) spectrometry. The protein fraction of the crude EPS (EPS C ) (propanol precipitated/extracted with EDTA) dominated the adsorption onto the germanium substratum. Removal of the Protease K accessible portion of the EPS C protein, and treatment with RNase and DNase, yielded a hygroscopic substance (EPS P ) which contained at least one adhesive polysaccharide component. Conditioning the substratum with EPS C diminished adsorption of the polysaccharide fractions in EPS P ; pre-adsorbed EPS C protein was not displaced. The rate of EPS C adsorption on substrata conditioned with EPS P was slower than to clean germanium; however, the projected surface coverage of protein after long times, based on an empirical datafit, was the same as that for a clean substratum; the EPS C proteins did not displace the pre-adsorbed adhesive polysaccharide fraction. SDS-PAGE (Coomassie blue stain) revealed an extensive homology between proteins from cell lysates and EPS C proteins. However, distinct differences in the banding pattern suggested that proteins did not originate primarily from cell lysis during the extraction procedure. The results indicate that adhesive components of EPS, with respect to a hydrophilic surface (germanium), can be either protein or polysaccharide and that they may compete for interfacial binding sites.

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“…Theoretical descriptions of the evanescent field which penetrates from the surface of the IRE are available (25). Briefly, the evanescent field intensity decreases exponentially with distance from the IRE surface such that 95% of the energy is contained within 0.477 ,um of a germanium-water interface at 2,000 cm-1 and within 1.05 ,um at 900 cm-'.…”

mentioning

confidence: 99%

Investigation of ciprofloxacin penetration into Pseudomonas aeruginosa biofilms

Suci

Mittelman

et al. 1994

Antimicrob Agents Chemother

316

183

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Bacterial infections associated with indwelling medical devices often demonstrate an intrinsic resistance to antimicrobial therapies. In order to explore the possibility of transport limitation to biofilm bacteria as a contributing factor, the penetration of a fluoroquinolone antibiotic, ciprofloxacin, through Pseudomonas aeruginosa biofilms was investigated. Attenuated total reflection Fourier transform infrared (ATR/FT-IR) spectrometry was employed to monitor bacterial colonization of a germanium substratum, transport of ciprofloxacin to the biofilm-substratum interface, and interaction of biofilm components with the antibiotic in a flowing system. Transport of the antibiotic to the biofilm-substratum interface during the 21-min exposure to 100 micrograms/ml was found to be significantly impeded by the biofilm. Significant changes in IR bands of the biofilm in regions of the spectrum associated with RNA and DNA vibrational modes appeared following exposure to the antibiotic, indicating chemical modification of biofilm components. These results suggest that transport limitations may be an important factor in the antimicrobial resistance of biofilm bacteria and that ATR/FT-IR spectrometry may be used to follow the time course of antimicrobial action in biofilms in situ.

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Surface Infrared Spectroscopy

Cited by 23 publications

References 90 publications

Characterization of Agricultural and Food Processing Residues for Potential Rubber Filler Applications

Characterization of Agricultural and Food Processing Residues for Potential Rubber Filler Applications

Adhesive extracellular polymers ofhyphomonasMHS‐3: Interaction of polysaccharides and proteins

Investigation of ciprofloxacin penetration into Pseudomonas aeruginosa biofilms

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