FTIR absorbance spectra

Fig. 7 Polarized FTIR absorbance spectra of the bending vibration Vg in single crystals of a-Sg ((a) natural a-Sg, thickness 1 mm, (b)-(d) a- Sg, thickness 400 pm, resolution < 0.05 cm ), after [105, 109]...

Fig. 14 FTIR absorbance spectra of the bsu and bin components of the torsional vibration V9 in single crystals of a- Sg (top) and a- Ss (bottom), after [105, 109], In the a- 8 crystal, the bin component is strong absorbing which led to a cut-off. The solid line in the spectrum is a result of soft smoothing, while the solid lines in the a- S8...

Figure 13 Left FTIR absorbance spectra of a control LDPE sample and difference spectra,...

Figure 7. FTIR absorbance spectra, 600-1600 cm of MgTPP thin film (a) initial evacuation and (b) evacuated after exposure to 750 torr of oxygen and light for 48 hours.

Figure 5.4 (a) Schematic of a three-layer polymer laminate, (b) FTIR absorbance intensity gray scale at 2850, 2980 and 1730 cm-1 at spectral resolution of 16 cm 1. (c) FTIR absorbance spectra from a single pixel within each of the three layers. Reproduced from figure 1 of Ref. 18, with permission. 

Fig. 1 ATR-FTIR absorbance spectra after different treatment steps of PP foils using a Ge crystal and 45° angle of incidence...

Figure 7 Electrochemical FTIR absorbance spectra (top) and difference spectrum (reduced-oxidized, bottom) of horse heart myoglobin...

Figure 12.17 FTIR absorbance spectra of Gum Arabica developed with DjO treatment compared with that of same treated with H O [33a],...

Figure 3. FTIR absorbance spectra of FN in PBS buffer (A), and FN adsorbed from 0.07 mg/ml solution for 2 h to PEO-PEUU (B), PDMS-PEUU (C) and PTMO-PEUU (D). The region from 1400 to 1100 cm has been expanded by 4x.

Figure 2. Representative FTIR absorbance spectra of Aristeromycin and Neplanocin A.

Figure 3. FTIR absorbance spectra of supernatants from four different S. citricolor mutants in the wavenumber ranges (a) 4000-600/cm-i (b) 1700-I000/cm-i. The background variation of the S. citricolor mutant culture supernatants and the general similarity between the FTIR spectra of aristeromycin and neplanocin A (see Figure 2) necessitates the use of multivariate data analysis for quantification and classification.

FIGURE 31.11 FTIR absorbance spectra of (a) starch and (b) dextrin. 

FIGURE 31.12 FTIR absorbance spectra of dextrin (arbitrary values), (a) From 900 to 4000 cm" and... 

The FTIR absorbance spectra of pullulan can be seen in Figure 31.15, being similar, mostly, to dextrin. Information on the glucopyranosyl units conformation in the polysaccharide can be acquired in the fingerprint region located between 1250 and 800 cm". ... 

FIGURE 31.13 FTIR absorbance spectra of microcrystalline cellulose (arbitrary values) (a) from 900 to 4000 cm and (b) the fingerprint region from 800 to 1500 cm". ... 

FIGURE 1 FTIR absorbance spectra of the neutral Chi a in THF in the electrochemical cell (250)L/m optical pathlength), before electrolysis (full line) and after cation formation at U = +0.8V (dashed line). T = 295K, 4-cm" resolution. Inset corresponding spectra in the visible spectral range. 

IR process control systems have also been used to determine the chemical composition of copolymers and polymer blends (PP/PE, PC/PBT/PET, PC/ABS, EVA) and to control PET, PA6 and EPDM polymerisation processes (end-group determination, etc.) [70, 92]. Partial least squares (PLS) analysis of ATR-FTIR absorbance spectra has provided an accurate, precise, rapid and cost effective method both for off-line and on-line compositional analysis at production sites of EO/FO copolymers in the range of 0-10 wt.% co-polymerised ethylene sites [104]. Proper examination of the statistics underlying the PLS model is essential in providing a robust calibration model. Gotz et al. [80] showed that the composition of ethylene/propylene copolymers could be determined at 200°C by means of an IR sapphire fibre-optic sensor. Similarly, monomer residuals and additives in polymer melts may be determined. 

For a quantitative determination of the crystallinity degree, the FTIR absorbance spectra were analysed applying Lambert and Beer s law to selected peaks [55]. 

Figure 4.7 FTIR absorbance spectra of aromatic polymer film before and after deuteration, and difference spectrum showing position of phenolic end-group. Reproduced from ref. 139, by permission of the Society of Applied Spectroscopy.

Figure 4.10 FTIR absorbance spectra recorded at room temperature of an ethylene-vinyl acetate (EVA) copolymer blended with chlorinated polyethylene (CPE) and poly(vinyl chloride) (PVC). A, pure EVA B, 40 60 and C, 80 20 wt% CPE-EVA, respectively D, pure EVA E, 40 60 and F, 80 20 wt% PVC-EVA, respectively. Reproduced from ref. 197, by permission of the publishers Butterworth Heinemann Ltd .

Figure 4.16 Polarisation FTIR absorbance spectra of a polyether-polyurethane recorded during elongation. Alternate polarised spectra were taken as 4 cm 12-scan spectra in 9-s intervals. Reproduced from ref. 298, by permission of John Wiley Sons Ltd, Chichester.

Figure 10.11 FTIR absorbance spectra of 2.5 mbar CO adsorbed at 90K on (a) oxidized samples and (b) reduced Au/Ce02 samples, in the carbonylic region DP prepared (bold curves), MDP prepared (thin curves), and CeOj (dotted curves). Reprinted from Tabakova et aV with permission from Elsevier.

Figure 10.15 Bulk solvent and anharmonic the experimental FTIR absorbance spectra of effects on IR spectra of chlorophyll-a cation chlorophyll-a in deuterated THF after cation in the tetrahydrofuran solution, in the C=0 formation [320]. stretching energy range, as compared to...

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