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Artykuły w czasopismach na temat „FT-IR Spectrum of Moo2”

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Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Trivedi, Mahendra Kumar, Rama Mohan Tallapragada, Alice Branton, et al. "Analysis of Physical, Thermal, and Structural Properties of Biofield Energy Treated Molybdenum Dioxide." International Journal of Materials Science and Applications 4, no. 5 (2015): 354–59. https://doi.org/10.11648/j.ijmsa.20150405.21.

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Molybdenum dioxide (MoO2) is known for its catalytic activity toward reforming hydrocarbons. The objective of this study was to evaluate the effect of biofield energy treatment on physical, thermal, and structural properties in MoO2. The MoO2 powder sample was divided into two parts, one part was remained as untreated, called as control, while the other part was subjected to Mr. Trivedi’s biofield energy treatment and called as treated. Both control and treated samples were investigated using X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform infrared (FT-IR

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2

Trivedi, Mahendra Kumar, Rama Mohan Tallapragada, Alice Branton, et al. "Analysis of Physical, Thermal, and Structural Properties of Biofield Energy Treated Molybdenum Dioxide." International Journal of Materials Science and Applications 4, no. 5 (2015): 354–59. https://doi.org/10.5281/zenodo.192199.

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Molybdenum dioxide (MoO2) is known for its catalytic activity toward reforming hydrocarbons. The objective of this study was to evaluate the effect of biofield energy treatment on physical, thermal, and structural properties in MoO2. The MoO2 powder sample was divided into two parts, one part was remained as untreated, called as control, while the other part was subjected to Mr. Trivedi’s biofield energy treatment and called as treated. Both control and treated samples were investigated using X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform infrared (FT-IR

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3

Kümmerle, Michael, Siegfried Scherer, and Herbert Seiler. "Rapid and Reliable Identification of Food-Borne Yeasts by Fourier-Transform Infrared Spectroscopy." Applied and Environmental Microbiology 64, no. 6 (1998): 2207–14. http://dx.doi.org/10.1128/aem.64.6.2207-2214.1998.

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ABSTRACT Computer-based Fourier-transform infrared spectroscopy (FT-IR) was used to identify food-borne, predominantly fermentative yeasts. Dried yeast suspensions provided the films suitable for FT-IR measurement. Informative windows in the spectrum were selected and combined to achieve optimal results. A reference spectrum library was assembled, based on 332 defined yeast strains from international yeast collections and our own isolates. All strains were identified with conventional methods using physiological and morphological characteristics. In order to assess identification quality, anot

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4

Sun, Xue Z., Sergei M. Nikiforov, Jixin Yang, Christopher S. Colley, and Michael W. George. "Nanosecond Time-Resolved Step-Scan FT-IR Spectroscopy in Conventional and Supercritical Fluids Using a Four-Window Infrared Cell." Applied Spectroscopy 56, no. 1 (2002): 31–39. http://dx.doi.org/10.1366/0003702021954403.

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Fast time-resolved step-scan FT-IR (s2–FT-IR) has been used to study excited states and reaction intermediates in conventional and supercritical solvents. We have developed a four-port IR cell for s2–FT-IR measurements. The generation of W(CO)5(Xe), following photolysis of W(CO)6 in supercritical Xe, has been used to optimize our s2–FT-IR measurements in supercritical fluids using the four-port IR cell. We have compared a number of different approaches for obtaining transient time-resolved IR (TR-IR) data. The IR diode-laser-based and s2–FT-IR approaches for TR-IR have been compared directly.

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5

Ekgasit, Sanong, and Adchara Padermshoke. "Optical Contact in ATR/FT-IR Spectroscopy." Applied Spectroscopy 55, no. 10 (2001): 1352–59. http://dx.doi.org/10.1366/0003702011953478.

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Optical contact between an internal reflection element (IRE) and a sample is crucial for obtaining a good spectrum in an attenuated total reflection (ATR) experiment. When an air gap is present between the IRE and the sample, the spectrum severely deteriorates. Two techniques for determining the goodness of contact are proposed—first, by making a comparison between polarized ATR spectra and, second, by making a comparison between ATR and transmission spectra. When the optical contact is achieved, the normalized p-polarized ATR spectrum is exactly the same as the normalized s-polarized ATR spec

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6

Friese, Michael A., and Sujit Banerjee. "Lignin Determination by FT-IR." Applied Spectroscopy 46, no. 2 (1992): 246–48. http://dx.doi.org/10.1366/0003702924125456.

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The lignin content of pulp is determined from its diffuse reflectance infrared spectrum by an algorithm that calculates the degree of overlap between two spectra. The lignin:cellulose fraction correlates with kappa number, a titrimetric measure of lignin. Essentially no sample preparation is required, and the procedure is insensitive to variations in moisture content. The algorithm is able to detect changes induced by exposure of pulp to NO2.

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7

Zhang, Pan Pan, Jia Qi Lin, and Wen Long Yang. "Fabrication and Ultraviolet Characterization of Polyimide Film." Advanced Materials Research 821-822 (September 2013): 906–8. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.906.

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A new microwave imidization method was used to prepare polyimide (PI) film in this paper. FT-IR spectrum and ultraviolet absorption spectrum are measured to study the chemical structure and optical properties of this film. The FT-IR spectrum shows that the characteristic imide groups are observed at the peaks of 727.18 cm-1, 1379.67 cm-1 and 1776.51 cm-1, which confirmed imide formation. The ultraviolet absorption spectrum reveals that optical band gap of the PI is about 2.64 eV.

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8

Zhang, Xiao Hu, Chun Ying Zhang, Feng Zhan, and Nan Chun Chen. "Fourier Transformation Infrared Spectrum Characteristics of Synthetic Zeolite A." Key Engineering Materials 591 (November 2013): 12–15. http://dx.doi.org/10.4028/www.scientific.net/kem.591.12.

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Synthesis of zeolite A by the use of natural materials (naturally stellerite) has been achieved without template agent. The final product was tested with X-ray diffraction, which was identified as the zeolite A. Then, the raw material and each step product were tested with Fourier Transformation Infrared (FT-IR). Comparing their FT-IR, we analyzed their spectrum characteristics, differences and reasons.

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9

Hutson, M. Shane, and Mark S. Braiman. "Direct Phase Correction of Differential FT-IR Spectra." Applied Spectroscopy 52, no. 7 (1998): 974–84. http://dx.doi.org/10.1366/0003702981944616.

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Step-scan transient Fourier transform infrared (FT-IR) difference spectra are often measured in an ac-coupled configuration. The resulting differential intensity spectra contain both positive and negative bands. This condition poses problems for direct phase correction by the standard Mertz and Forman methods. Restricting the calculated phase angle to the range [–π/2, π/2] was previously shown to fix some of these problems, but we show that the use of a reduced-resolution phase spectrum can produce other artifacts. The effect of reduced resolution is analyzed for a simulated noise-free spectru

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10

Benko, James. "A Low-Cost Salt Plate Holder for Micro FT-1R." Microscopy Today 7, no. 8 (1999): 28. http://dx.doi.org/10.1017/s1551929500065093.

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FT-IR (Fourier Transform Infrared) spectroscopy is an instrumental technique for measuring the infrared spectrum of materials. Many organic compounds have characteristic spectra that can be used for their identification, and specific functional groups (hydroxyl, carbonyl. amine, etc.) have characteristic bands at certain frequencies.Microscopes have been coupled to FT-IR instruments and allow the IR spectrum determination of single particles. This greatly increases the identification possibilities of small particles and contaminants. These particles can be mounted on sodium chloride or potassi

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11

Marcott, Curtis, A. E. Dowrey, and Isao Noda. "Instrumental Aspects of Dynamic Two-Dimensional Infrared Spectroscopy." Applied Spectroscopy 47, no. 9 (1993): 1324–28. http://dx.doi.org/10.1366/0003702934067531.

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Dynamic two-dimensional infrared (2D IR) correlation maps are a convenient means of examining the information contained in time-resolved IR spectra. Dynamic 2D IR spectra can be collected with the use of either dispersive or Fourier transform (FT) IR spectrometers. Use of a step-scanning FT-IR spectrometer has advantages over conventional rapid-scan FT-IR spectrometry when one is acquiring time-resolved IR data on time scales faster than about 0.1 s, because the spectral multiplexing is removed from the time domain. Dynamic IR spectra of atactic polystyrene (undergoing a small-amplitude oscill

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12

Hong, Daewoong, and Seogyeon Cho. "Improved Methods for Performing Multivariate Analysis and Deriving Background Spectra in Atmospheric Open-Path FT-IR Monitoring." Applied Spectroscopy 57, no. 3 (2003): 299–308. http://dx.doi.org/10.1366/000370203321558218.

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Open-path Fourier transform infrared spectrometry (OP/FT-IR) may improve the temporal and spatial resolution in air pollutant measurements compared to conventional sampling methods. However, a successful OP/FT-IR operation requires an experienced analyst to resolve chemical interference as well as to derive a suitable background spectrum. The present study aims at developing a systematic method of handling the OP/FT-IR derived spectra for the measurement of photochemical oxidants and volatile organic compounds (VOCs) in urban areas. A classical least-squares (CLS) method, the most frequently u

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13

Cossar, Marlee, Joo Teh, Annikki Kivisto, and Jason Mackenzie. "Determination of the Percentage of Homopolymer Component in Ziegler/Natta Catalyst Linear Low-Density Polyethylene Resins Using High-Temperature Cell Fourier Transform Infrared and Partial Least Squares Quantitative Analysis Technique." Applied Spectroscopy 59, no. 3 (2005): 300–304. http://dx.doi.org/10.1366/0003702053585435.

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A new method for the determination of the percentage of homopolymer component, using high-temperature cell Fourier transform infrared (FT-IR) by partial least squares (PLS) quantitative analysis technique, was developed and applied to Ziegler Natta linear low-density polyethylene (LLDPE). The method is based on the IR spectrum changes between the 730 cm−1 band and 720 cm−1 band at the temperature of 110 °C, which is near the melting point of the polyethylene. The HD% (the percentage of high-density component, i.e., the percentage of homopolymer component) results obtained by CTREF (CRYSTAF in

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14

Stiefvater, Otto L. "High-Resolution Vibrational Spectra of Furazan II. The B1 Fundamental ν 11 at ~ 1175 cm–1 from Fourier-Transform Infrared Spectroscopy". Zeitschrift für Naturforschung A 47, № 3 (1992): 499–506. http://dx.doi.org/10.1515/zna-1992-0310.

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Abstract The high-resolution FT-IR spectrum of the A-type fundamental ν11 of furazan ( C2H2N20) has been recorded and analysed against the background of rotational information from DRM microwave spectroscopy to yield the band origin as ν110= 1175.3377 + 0.0001 cm-1 . The combined use of microwave (MW) and FT-IR data gives this band origin with a statistical uncertainty of σ= 10-6cm-1 and leads to a refinement of the rotational constants of the state ν11 = 1 over those derivable from either MW or FT-IR data alone

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15

Marcott, Curtis, and Robert C. Reeder. "Infrared spectroscopic chemical imaging." Proceedings, annual meeting, Electron Microscopy Society of America 54 (August 11, 1996): 260–61. http://dx.doi.org/10.1017/s0424820100163769.

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Infrared (IR) spectroscopy is a powerful, widely used technique for identifying materials or chemical compounds. An IR spectrum often provides a specific fingerprint for a given molecular component or species. IR frequencies, intensities, and line widths are also extremely sensitive to environmental perturbations and changes in molecular structure. Infrared spectroscopic images recorded through a Fourier transform infrared (FT-IR) microscope attachment have traditionally been constructed by translating a mapping stage a single pixel at a time through the sample area of interest; this is a very

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16

Petibois, Cyril, Vincent Rigalleau, Anne-Marie Melin, et al. "Determination of Glucose in Dried Serum Samples by Fourier-Transform Infrared Spectroscopy." Clinical Chemistry 45, no. 9 (1999): 1530–35. http://dx.doi.org/10.1093/clinchem/45.9.1530.

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Abstract Background: Practical improvements are needed to allow measurement of glucose concentrations by Fourier- transform infrared (FT-IR) spectroscopy. We developed a new method that allows determination of the glucose concentration in dried sera. Methods: We studied 32 serum samples after fourfold dilution and desiccation before FT-IR analyses on a spectrometer operated at a resolution of 2.0 cm−1. We integrated all spectral windows at the surface of the spectrum in the C—O region. For comparison, glucose was measured in the sera by a glucose oxidase method. Results: One peak within the sp

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17

Holland, Frank, Manfred Winnewisser, and John W. C. Johns. "High resolution FT-IR spectrum of tricarbon bisulfide, SCCCS." Mikrochimica Acta 95, no. 1-6 (1988): 417–20. http://dx.doi.org/10.1007/bf01349800.

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Primiano, Aniello, Silvia Persichilli, Giovanni Gambaro, et al. "FT-IR Analysis of Urinary Stones: A Helpful Tool for Clinician Comparison with the Chemical Spot Test." Disease Markers 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/176165.

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Background.Kidney stones are a common illness with multifactorial etiopathogenesis. The determination of crystalline and molecular composition and the quantification of all stone components are important to establish the etiology of stones disease but it is often laborious to obtain using the chemical method. The aim of this paper is to compare chemical spot test with FT-IR spectroscopy, for a possible introduction in our laboratory.Methods.We analyzed 48 calculi using Urinary Calculi Analysis kit in accordance with the manufacturer’s instructions. The same samples were analyzed by FT-IR using

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19

Haaland, David M., Edward V. Thomas, and Dianna S. Blair. "Improvements in Methods for Spectral Combination of Gas Chromatography/Fourier Transform Infrared Spectroscopic Data." Applied Spectroscopy 47, no. 10 (1993): 1612–19. http://dx.doi.org/10.1366/0003702934334660.

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Coaddition of spectra in a single-component peak of a gas Chromatograph (GC) obtained with a Fourier transform infrared spectrometer is the method generally used to improve the signal-to-noise ratio (S/N) of the spectrum of the eluted analyte. It is commonly thought that coaddition of spectra to a relative intensity level of 40% of the GC peak will lead to the optimal improvement in S/N of the resulting composite spectrum. We have shown that this is not generally the case for either simulated Gaussian-shaped or experimentally obtained asymmetric GC bands. The optimal intensity level for coaddi

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20

Messerschmidt, Robert G., and D. Bruce Chase. "FT-Raman Microscopy: Discussion and Preliminary Results." Applied Spectroscopy 43, no. 1 (1989): 11–15. http://dx.doi.org/10.1366/0003702894201761.

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This paper reports on the first spectra obtained using a microscope apparatus to perform FT-Raman spectroscopy. It is considered desirable to use a standard FT-IR microscope for these measurements, since this approach may lead to the attainment of both FT-IR and FT-Raman microscope data from a single instrument. The relative performance of the microscope apparatus compared to that of a previously designed macro-apparatus is studied. The described micro-apparatus is then used to measure the FT-Raman spectrum of a single crystal of bis-methyl-styry I benzene and of a single fiber of Kevlar®. The

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21

Zhang, Ying, Dong Wang, Xu Zhang, and Fengyu Qu. "Template-Free Synthesis of Porous Cu2O Nanospheres at Room Temperature and Investigation on Their Adsorption Property." Journal of Nanomaterials 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/378919.

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Porous cuprous oxide (Cu2O) nanospheres composed of small nanoparticles with diameters at 10~20 nm were successfully synthesized without surfactant at room temperature within 5 min. The products were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), N2adsorption-desorption, and Fourier transform infrared (FT-IR) spectrum. The adsorption ability of the as-prepared products towards methyl orange (MO) as the pollutant was investigated and FT-IR spectrum

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22

Hazel, G., F. Bucholtz, I. D. Aggarwal, G. Nau, and K. J. Ewing. "Multivariate Analysis of Mid-IR FT-IR Spectra of Hydrocarbon-Contaminated Wet Soils." Applied Spectroscopy 51, no. 7 (1997): 984–89. http://dx.doi.org/10.1366/0003702971941359.

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This article describes a series of mid-IR FT-IR reflectance spectroscopy measurements of hydrocarbon-contaminated wet soils. The eventual goal of this work is the development of an analysis tool suitable for real-time in situ underground measurements where a suitable reference spectrum is not available. Multivariate analysis of the resulting spectral data indicates that the strongly varying wet soil matrix and the absence of a suitable reference spectrum in the field do not render this measurement technique unfeasible as a means of realizing remote in situ chemical detection in wet soils. It w

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Zhang, Ying, Naren Gerile, Jin Kang Zhang, Ta Na Bao, and O. Tegus. "Synthesis and Optical Absorption Properties of Yttrium (III) Acylaminocarboxylates Complexes." Solid State Phenomena 310 (September 2020): 34–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.310.34.

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Yttrium (III) complexes of Acylaminocarboxylates (N-octanoyl-alaninates, N-octanoyl-phenylalaninate, N-octanoyl-serinates) were prepared by chemical reaction method in methanol solution. The abbreviation of these yttrium (III) complexes were Y(oct-ala)3, Y(oct-phe)3 and Y(oct-ser)3 respectively. These complexes were characterized by elemental analysis, XRD, FT-IR, 1H NMR, UV-Vis and UV-Vis diffuse reflection. WAXD and SAXS profiles show the amorphous structure of the yttrium complexes. FT-IR and 1H NMR spectrum establish the molecular formula, functional group information and coordination stru

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Snyder, Randy W., and C. Wade Sheen. "FT-IR Analysis of High-Temperature Solid-Phase Reactions Using GC-IR Software." Applied Spectroscopy 42, no. 2 (1988): 296–98. http://dx.doi.org/10.1366/0003702884428392.

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A method for following chemical reactions in polymers, using the GC-IR software on an FT-IR spectrometer and a high-temperature thermal cell, is discussed. The method reduces disk access time between the collection of each spectrum, allowing many more data points for kinetic experiments to be collected. The imidization reaction of polyimides above 200°C is given as an example.

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Andronie, Luisa, Aurelia Coroian, Vioara Miresan, et al. "Results obtained by investigating saffron ussing FT-IR spectroscopy." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies 73, no. 2 (2016): 238. http://dx.doi.org/10.15835/buasvmcn-asb:12162.

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The biological activity and the pharmaceutical properties of plants are strongly dependent on their structure.The FT-IR spectra of saffron (commercial) have been obtained. The vibrational fundamentals from the IR spectrum, were analyzed and assigned acoording to the available literature. In the present research work the genus saffron is selected because it is famous in wold as foods and also as medicine.

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Saperstein, David D. "IR Spectroscopy of Polyperfluoroethylene Oxide Lubricants on Amorphous Carbon." Applied Spectroscopy 43, no. 3 (1989): 481–83. http://dx.doi.org/10.1366/0003702894202733.

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The FT-IR transmission spectrum of 30 Å of a polyperfluoroethylene oxide lubricant on amorphous carbon is shown to be proportional to the transmission spectrum of a 0.4-μm film, and thus, there appears to be little or no interaction of the lubricant with amorphous carbon. These transmission spectra are dramatically different from the spectrum of the lubricant on a carbon-overcoated thin-film disk recorded at grazing incidence. The alteration of the grazing incidence reflection spectrum is due to polarization changes of the light when a strong absorber is measured near a reflecting surface.

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Smith, A. Lee. "Are Group Frequencies Obsolete?" Applied Spectroscopy 41, no. 7 (1987): 1101–5. http://dx.doi.org/10.1366/0003702874447392.

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In spite of the diminishing number of publications on the subject, group frequencies remain an important research tool for infrared spectroscopists. The capabilities of FT-IR present us with opportunities for discovering useful new correlations. High-quality conventional spectra, vapor spectra, and matrix isolation spectra are easy to obtain. Large libraries of FT-IR spectra are being generated and made available in digital form for fast library searching. Computerized spectrum interpretation is becoming a reality. All these applications, for best utility, require wavelength accuracy of ±l/cm,

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Carter, R. O. "The Application of Linear PA/FT-IR to Polymer-Related Problems." Applied Spectroscopy 46, no. 2 (1992): 219–24. http://dx.doi.org/10.1366/0003702924125410.

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A simplified method has been developed which allows the computation of linear photoacoustic FT-IR spectra using only one sample and one reference interferogram from a commercial, rapid-scan spectrometer. The application of linear computation to photoacoustic infrared data can produce spectra similar to transmission spectra through the reduction, if not elimination, of the saturation artifacts typical of amplitude computation, the usual mode of producing a PA/FT-IR spectrum or a transmission mode spectrum. Comparison of the resulting linear spectra with amplitude spectra has been used to demons

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Ke, Wei Chang, Yi Kun Chen, Guo Xi Xiong, Xiang Hong Peng, Chao Zhu, and Xiao Qiu Yang. "Synthesis and Characterization of the Water-Soluble Oleoyl Acetyl Chitosan." Advanced Materials Research 284-286 (July 2011): 1782–85. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.1782.

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Oleoyl chloride was synthesized by oleic acid and thionyl dichloride (SOCl2), and then reacted with chitosan in dichloromethane to obtain the oleoyl chitosan. Novel water-soluble oleoyl acetyl chitosan (OACh) was synthesized using oleoyl chloride reacted with acetic anhydride in pyridine. The chemical structure of the OACh was characterized by FT-IR, 1H and 13C NMR. There existed the peaks at 1743.9 cm-1 (C=O) and 1658.1 cm-1(C=C) in FT-IR spectrum, and the peaks at 170.8, 171.6 and 172.5 ppm which were assigned to the C=O of the oleoyl and acetyl groups in 13C NMR spectrum. The results indica

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Yu, Mengqi, Guang Xu, Ming Qin, Yanling Li, Yuying Guo, and Qun Ma. "Multiple Fingerprints and Spectrum-Effect Relationship of Polysaccharides from Saposhnikoviae Radix." Molecules 27, no. 16 (2022): 5278. http://dx.doi.org/10.3390/molecules27165278.

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PMP-HPLC, FT-IR, and HPSEC fingerprints of 10 batches of polysaccharides from Saposhnikoviae Radix with different production areas and harvest times have been prepared, and the chemometrics analysis was performed. The anti-allergic activity of 10 batches of Saposhnikoviae Radix polysaccharide (SP) was evaluated, and the spectrum-effect relationship of the 10 batches of SP was analyzed by gray correlation degree with the chromatographic fingerprint as the independent variable. The results showed that the PMP-HPLC, HPSEC, and FT-IR fingerprints of 10 batches of SP had a high similarity. Two mono

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Doss, A., and T. P. Kumari Pushpa Rani. "Functional Group Analysis of Andrographis paniculata by FT IR Spectrum." Research Journal of Pharmacol. 13, no. 2 (2019): 27–31. http://dx.doi.org/10.36478/rjpharm.2019.27.31.

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Brienne, Stéphane H. R., Ross D. Markwell, Steven M. Barnett, Ian S. Butler, and James A. Finch. "Spinning-Cell FT-Raman Spectroscopy: Application to Crystalline Octacarbonyldicobalt(0), Co2(CO)8." Applied Spectroscopy 47, no. 8 (1993): 1131–33. http://dx.doi.org/10.1366/0003702934068035.

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Raman spectrum of crystalline octacarbonyldicobalt(0), Co2(CO)8, has been successfully obtained for the first time by using a Fourier transform instrument together with a spinning sample cell to avoid decomposition of Co2(CO)8 upon exposure to the near-IR laser radiation used to excite the spectrum. Previously, only limited regions of the Raman spectrum could be obtained with visible laser excitation because of extensive sample burning. The new FT-Raman results, combined with the related IR data from the literature, provide a better description of the vibrational properties of this important b

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Solomon, Peter R., Robert M. Carangelo, David G. Hamblen, and Philip E. Best. "Infrared Analysis of Particulates by FT-IR Emission/Transmission Spectroscopy." Applied Spectroscopy 40, no. 6 (1986): 746–59. http://dx.doi.org/10.1366/0003702864508421.

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In this paper we report on a new method for the on-line chemical characterization of gas-suspended particulate and liquid droplet streams. The method is a combination of emission and transmission (E/T) spectroscopy performed using a Fourier transform infrared (FT-IR) spectrometer and a cell which allows analysis of room-temperature particulates surrounded by hot walls. The method was based on the discovery that the spectrum of radiation coming from such particles contained structure corresponding to the infrared absorption spectrum of the particulates. It was determined that the observed energ

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DeForest, Cindy L., Jun Qian, and Roger E. Miller. "Composition Determination of Multicomponent Organic Aerosols by On-Line FT-IR Spectroscopy." Applied Spectroscopy 56, no. 11 (2002): 1429–35. http://dx.doi.org/10.1366/00037020260377724.

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A new approach is reported for determining the composition of multicomponent organic aerosols using FT-IR spectroscopy. In this study, laboratory-generated aerosol particles are thermally evaporated and the resulting vapor is immediately analyzed using FT-IR spectroscopy. The composition of the aerosol is determined by fitting the vapor spectrum to a linear combination of reference spectra of the individual components. Application of the method to the detection of polycyclic aromatic hydrocarbons, changes in aerosol composition, and analysis of diesel fuel is demonstrated.

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Li, Xiang, Qing-Bo Li, Guang-Jun Zhang, et al. "Identification of Colitis and Cancer in Colon Biopsies by Fourier Transform Infrared Spectroscopy and Chemometrics." Scientific World Journal 2012 (2012): 1–4. http://dx.doi.org/10.1100/2012/936149.

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Cancer is a disease that does great harms to the health of human beings. FT-IR spectroscopy could identify variability at the molecular level in biological specimens. It is a rapid and noninvasive method, which could be used intraoperatively to modify surgical procedures. The aim of this paper is to identify and separate cancer from colitis in endoscopic colon biopsies through the use of FT-IR spectroscopy. A total of 88 endoscopic colon samples, including 41 cases of colitis and 47 cases of colon cancer, were obtained. Specimens were placed on an ATR accessory linked to FT-IR spectrometer wit

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Wasim, Muhammad, Rameez Saeed Malik, Muhammad Usman Tufail, Ahsan Ullah Jutt, Rafiq Ahmad, and Kashif Mairaj Deen. "Synthesis and Characterization of Hydroxyapatite Powder from Natural Bovine Bone." Journal of Biomimetics, Biomaterials and Tissue Engineering 19 (March 2014): 35–42. http://dx.doi.org/10.4028/www.scientific.net/jbbte.19.35.

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Hydroxyapatite was synthesized from bovine cortical bone by thermal decomposition method. The chemically cleaned bone was heated to 160 °C for 48 hour to remove moisture and any organic contents followed by decomposition in muffle furnace at 850 °C for 6 hours. The so-obtained white powder was characterized by Fourier Transform Infrared (FT-IR) spectroscopy and X-Ray Diffraction (XRD), SEM and EDX method. The FT-IR results proved the existence of hydroxyl (OH-) and phosphate (PO4-3) groups in the powder. XRD analysis was in support to the FT-IR spectrum, however, an additional phase of tri-cal

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Robertson, R. M., J. A. de Haseth, and R. F. Browner. "MAGIC-LC/FT-IR Spectrometry with Buffered Solvent Systems." Applied Spectroscopy 44, no. 1 (1990): 8–13. http://dx.doi.org/10.1366/0003702904085886.

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The first demonstration of identifiable infrared (IR) spectra obtained from buffered (volatile and nonvolatile buffers) mobile phases using the Monodisperse Aerosol Generator Interface for Combining Liquid Chromatography with Fourier Transform Infrared (MAGIC-LC/FT-IR) spectrometry is described. Ammonium acetate, a volatile buffer, was used to buffer an 80:20 acetonitrile: water mobile phase to pH 5.0. Caffeine was deposited from this buffered mobile phase, and the spectrum was used as a reference to compare with caffeine spectra obtained from nonvolatile buffered mobile phases. The two nonvol

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Mohd Ali, Siti Aishah, and Jalifah Latip. "RAPID INVESTIGATION OF THE METABOLITE CONTENT IN HIBISCUS SABDARIFFA var. UKMR-2 CULTIVATED UNDER THE INFLUENCE OF ELEVATED CO2 USING TRI-STEP FT-IR SPECTROSCOPY." Jurnal Teknologi 83, no. 1 (2020): 75–83. http://dx.doi.org/10.11113/jurnalteknologi.v83.14825.

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Rapid methods based on untargeted analysis technique such as Fourier Transform Infrared (FT-IR) spectroscopy can provide much faster and easier solution for food authentication. However, studies on the metabolite content in UKMR-2 calyces using FT-IR spectroscopy has not been reported yet in any previous studies. Thus, the present study was performed to analyze the differences in metabolite content in UKMR-2 calyces under the influences of different [CO2] treatment by applying tri-step infrared based fingerprinting. The UKMR-2 plant cultivation was exposed to ambient [CO2] (400 µmol/mol) and e

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Baghdadi, Aslan, Warren K. Gladden, and Donald R. Flach. "Nonlinear Effects of Digitizer Errors in FT-IR Spectroscopy." Applied Spectroscopy 40, no. 5 (1986): 617–28. http://dx.doi.org/10.1366/0003702864508557.

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This paper is an investigation of the effects of errors in the analog-to-digital converter (ADC) of a Fourier transform infrared (FT-IR) spectrometer on the photometric accuracy of that spectrometer. The effect of ADC errors on the spectrum after Fourier transformation is calculated analytically for monochromatic, two-line, and wide square band emission spectra. Numerical modeling is used to extend the analysis to absorption spectra, and to include the effects of noise on the amplitude of absorbance bands. These analyses showed that ADC errors can generate artifacts throughout the spectrum, al

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Espinoza, Luis H., Thomas M. Niemczyk, and Brian R. Stallard. "Generation of Synthetic Background Spectra by Filtering the Sample Interferogram in FT-IR." Applied Spectroscopy 52, no. 3 (1998): 375–79. http://dx.doi.org/10.1366/0003702981943554.

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The calculation of an absorbance spectrum depends on the measurement of a blank, or background spectrum. In many cases, such as the determination of atmospheric constituents with the use of open-path Fourier transform infrared spectroscopy (FT-IR) or the determination of water vapor in a gaseous sample, it is very difficult to obtain a good background spectrum. The difficulty is due to the fact that it is nearly impossible in these situations to measure a spectrum with no analyte features present. We present a method of generating a background spectrum based on filtering the analyte features f

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Lim, Chaiho, Kwanghee Park, Yeongseok Chae, Kyungwon Kwak, and Minhaeng Cho. "Ultrafast Continuum IR Generation and Its Application in IR Spectroscopy." International Journal of Molecular Sciences 23, no. 21 (2022): 13245. http://dx.doi.org/10.3390/ijms232113245.

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The spectral range of femtosecond time-resolved infrared spectroscopy is limited by the bandwidth of mid-IR pulses (100~400 cm−1) generated from the combination of Ti:Sapphire amplifier, Optical Parametric Amplifier (OPA), and Difference Frequency Generation (DFG). To overcome this limitation, we implement a compact continuum mid-IR source producing ultrafast pulses that span the frequency range from 1000 to 4200 cm−1 (from 10 to 2.4 μm), which utilize the mixing of fundamental, second-harmonic, and third-harmonic of 800 nm pulse in the air. After building an IR spectrometer with continuum IR

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Yildirim, Kenan, and Yusuf Ulcay. "An experimental study and model development of poly(ethylene terephthalate) yarn morphology." e-Polymers 14, no. 2 (2014): 121–31. http://dx.doi.org/10.1515/epoly-2013-0068.

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AbstractIn this study, macromolecular arrangements in fibers were investigated and a novel approach based on model development for partially oriented (POY) polyethylene terephthalate (PET) yarn morphology was proposed. Differential scanning calorimeter (DSC) analysis, Fourier transform infrared (FT-IR) analysis, boiling water shrinkage and tensile tests were performed through the study. DSC thermogram, FT-IR spectra, stress-strain curve, the change in the boiling water shrinkage properties and data from the literature were used to develop the model for POY PET fiber morphology. In order to mak

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Ahmed, M. Khalique, Michael P. McLeod, Jean Nézivar, and Allison W. Giuliani. "Fourier transform infrared and near-infrared spectroscopic methods for the detection of toxic Diethylene Glycol (DEG) contaminant in glycerin based cough syrup." Spectroscopy 24, no. 6 (2010): 601–8. http://dx.doi.org/10.1155/2010/608749.

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Recently there have been reports of the contamination of cough syrups with Diethylene Glycol (DEG). The consumption of such cough syrups has devastating effects on the health. In this paper we report evidence that Fourier transform infrared (FT-IR) and near-infrared (NIR) spectroscopic techniques are viable, simple, cost effective, rapid and fool proof methods for the identification and quantification of DEG in glycerin based cough syrups. The FT-IR and NIR spectra of the glycerin based cough syrup and up to 50:50 mixtures of DEG in cough syrup are recorded. The major peaks in the FT-IR spectr

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Zhao, Sheng Nan, Chang Ping Wei, Li Dan Dong, Xin Liu, Jing Li, and Feng Ming Wang. "Synthesis and Characterization of Isobutyl-Chitosan-Ca(II) Complexes." Materials Science Forum 809-810 (December 2014): 503–6. http://dx.doi.org/10.4028/www.scientific.net/msf.809-810.503.

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Through an alkylation reaction under alkaline conditions, isobutyl was introduced to chitosan to form isobutyl-chitosan. Isobutyl-chitosan-Ca (II) complex was synthesized at pH 6.0 by a reaction of isobutyl-chitosan and calcium chloride. The structure of isobutyl-chitosan-Ca (II) complexes was characterized by ultraviolet-visible diffuse reflectance spectrum (UV-Vis) and FT-IR spectrum, and the content of calcium was measured by inductively coupled plasma-optical emission spectrometry (ICP-OES). The FT-IR spectra of isobutyl-chitosan and chitosan showed that structure of isobutyl-chitosan-Ca (

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Nallendran, R., G. Selvan, and A. R. Balu. "CdO-Fe3O4 nanocomposite with enhanced magnetic and photocatalytic properties." Materials Science-Poland 37, no. 1 (2019): 100–107. http://dx.doi.org/10.2478/msp-2019-0012.

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AbstractPure CdO nanopowder and CdO-Fe3O4 nanocomposite were synthesized by a cost effective chemical method, and the samples were characterized by XRD, SEM, TEM, FT-IR, UV-Vis-NIR and PL. Also, magnetic and photocatalytic properties of the synthesized samples were studied. XRD patterns of the composite confirm the presence of diffraction peaks related to both CdO and Fe3O4. EDX spectrum confirms the presence of the elements Cd, O and Fe in the composite. Peaks related to Cd–O and Fe–O bonds were observed respectively at 688 cm−1 and 592 cm−1 in the FT-IR spectrum. The paramagnetic behavior of

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Xiao, Zhen Hui, Shui Sheng Wu, Yan Lin Sun, Yu Lin Zhao, and Ya Ming Wang. "Microwave-Hydrothermal Synthesis and Characterization of Graphene." Advanced Materials Research 602-604 (December 2012): 917–20. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.917.

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Graphene was synthesized by microwave-hydrothermal chemical reduction of graphite oxide using hydrazine hydrate as the reducing agent. Graphene was characterized using X-ray diffraction, UV-visible spectrum, FT-IR spectrum and scanning electron microscopy. Results indicated that the as-prepared graphene was wrinkled and comprised fewer graphenes with a highly crystalline structure.

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Zvyagin, A. I., and V. I. Kut’ko. "The vibration spectrum and structural phase transitions in cesium–bismuth molybdate." Soviet Journal of Low Temperature Physics 13, no. 5 (1987): 303–5. https://doi.org/10.1063/10.0031705.

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The vibrational IR spectra of a CsBi(MoO4)2 crystal have been studied in the temperature range 16−300° K in polarized radiation (E‖b, E‖c) in the frequency range 600−1000 cm−1. The influence of structural phase transitions (Tc1 = 135° K, Tc2 = 330° K) on the IR reflection spectra of CsBi(MoO4)2 has been found. By comparing the vibration spectrum of CsBi(MoO4)2 with the spectra of CsDy(MoO4)2 crystals which were studied earlier, the symmetry of the low-temperature phase was established. It was established that below Tc2 and Tc1 the symmetries of the low-temperature phases are D2h8 and Ci1, resp

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Anugrahati, Nuri Arum, Yudi Pranoto, Yustinus Marsono, and Djagal Wiseso Marseno. "Structural Changes in Cooked Rice Treated with Cooling-Reheating Process and Coconut Milk Addition as Observed With FT-IR and 13C NMR." Agritech 37, no. 1 (2017): 78. http://dx.doi.org/10.22146/agritech.10669.

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The molecular structural changes of food could be observed by the technique of FT-IR and 13C NMR spectroscopy. This research was aimed to study the structural changes in cooked rice treated with cooling-reheating process and coconut milk addition using FT-IR and 13C NMR. It was found that the cooling-reheating process and addition of coconut milk cause several structural changes of cooked rice. The IR analysis showed the bands at 3,400, 2,900, 1,018 and 856 cm-1 changed due to the retrogradation during cooling process. The spectrum of 13C NMR showed the change of peaks at 100.28 and 100.10 ppm

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Liao, Qiang Qiang, Yi Jiu Li, and Bo Xiang. "Synthesis and Characterization of an Aminated D-Glucose and its Stability of Cu²⁺Complex." Advanced Materials Research 197-198 (February 2011): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amr.197-198.65.

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An aminated D-glucose [N,N'-di-b-D-glucopyranosyl ethylenediamine] was prepared and thoroughly characterized by FT-IR, ESI-MS, NMR spectra and elemental analysis. Compared with D-glucose, the FT-IR spectrum of the aminated glucose showed a moderate peak at 1629~1608 cm-1which was attributed to dNH vibration, suggesting glucose reacted to ethylenediamine (en). The ESI-MS spectrum exhibited a strong peak atm/z383.2, which was assigned to the species [C14H27O10N2]-. The1H-NMR spectrum of the aminated D-glucose demonstrated the signal of the C1proton and the amino proton at 4.82~4.79ppm, illustrat

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Minami, Kei-Ichiroh, Hiroaki Okayama, and Satoshi Kawata. "Super-Dynamic-Range and Super-Quantization Methods for FT-IR Spectra." Applied Spectroscopy 47, no. 4 (1993): 441–45. http://dx.doi.org/10.1366/0003702934334903.

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Numerical methods are proposed for expanding the dynamic range and increasing the quantization resolution of Fourier transform infrared spectrum data. In these methods, an interferogram is oversampled at a rate higher than the Nyquist sampling rate. From the oversampled interferogram data, the full-range interferogram or the lost quantization bits are recovered by using the Gerchberg-Papoulis iterative algorithm, incorporating constraints on the amplitude range of the interferogram and on the band limitation and non-negativity of the spectrum. Experimental results for IR absorption spectra of

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