1,1-Dimethyl-3-oxo-1,4-diazepan-1-ium chloride (1) and 1,1-dimethyl-1-carboxymethyl-3-aminopropyl ammonium hydrochloride (2) have been obtained by the reactions of 1,1-dimethyl-1,3-propylenediamine with ethyl chloroacetate and chloroacetic acid, respectively. The products have been characterized by FTIR, Raman and NMR spectroscopy. B3LYP calculations have also been carried out. The screening co...

The identification, differentiation and classification of microorganisms have been subjects of research for many years. Recently, Fourier transform infrared (FTIR) spectroscopy techniques have gained attention in the characterization and classification of microorganisms based on biochemical profiles and cell structure characteristics. In the present study, the characterization and differentiati...

Plasma polymerized pyromucic aldehyde (PPPA) thin films have been deposited on to glass substrates by glow discharge technique. Scanning electron microscopy (SEM) graphs reveal that the surface morphology of PPPA thin films is uniform and flawless. FTIR analysis reveals that the chemical composition of PPPA films is different from that of the pyromucic aldehyde (PA). From the UV-vis spectra dir...

This paper examines the sensitivity and results for a new product, CO2, from existing data from solar-observing Fourier Transform InfraRed (FTIR) spectrometer at NyÅlesund, Spitsbergen. This instrument is part of a world-wide Network for the Detection of Atmospheric Composition Change (NDACC), which has collected data since 1978. The sensitivity and results are compared to a newer network desig...

We introduce a new class of FTIR spectrometers capable of acquiring 6×10 – 1.4×10 interferograms (spectra) per second, over the spectral range of 1 μm – 12 μm, with a resolution of 10 cm or better. The new FTIR technology is based on the use of birefringence interferometers and employs photoelastic modulators (PEMs) as birefringent elements for ultra-high modulation speed. With characteristic d...

TiO₂-SiO₂ binary coatings were deposited by a sol-gel dip-coating method using tetrabutyl titanate and tetraethyl orthosilicate as precursors. The structure and chemical composition of the coatings annealed at different temperatures were analyzed by Raman spectroscopy and Fourier Transform Infrared (FTIR) spectroscopy. The refractive indices of the coatings were calculated from the measured tra...

The temperature of solid state propellant combustion flame is studied by a Bruker OPAG33 Fourier Transform Infrared Spectrometer (FTIR). The infrared emission spectra of Nitrate Ester Plasticized Polyether Propellant (NEPE) solid propellant are measured with a resolution of 4 cm−1 at a testing distance of 20 m in real time. The temperature of NEPE propellant plume is calculated by using the fin...

The molecular orientation in amphiphilic hemicyanine Langmuir-Blodgett (LB) films has been studied quantitatively by Fourier transform infrared (FTIR) spectroscopy and second harmonic generation (SHG). From the analysis of transmission and reflection absorption (RA) spectra of FTIR, the tilt angles to the surface normal of the hydrocarbon chain axis and the chromophore of amphiphilic hemicyanin...

We have previously reported spectral differences for cells at different stages of the eukaryotic cell division cycle. These differences are due to the drastic biochemical and morphological changes that occur as a consequence of cell proliferation. We correlate these changes in FTIR absorption and Raman spectra of individual cells with their biochemical age (or phase in the cell cycle), determin...

Fig. 1 shows the FTIR spectra of GA, AGA-PEG and AGA-PEG-ST. In the spectra of GA, the absorption peaks at 3450 cm-1, 2947 cm-1 and 1650 cm-1 are associated with hydroxyl bonds and alkene bonds of GA, respectively. The broad peak appearing between 3400 and 2500 cm-1 and the peak at 1720 cm-1 are respectively contributed to O-H bonds and carbonyl bonds in carboxylic acid. In the spectra of AGA-P...