Target-testing factor analysis of Fourier transform infrared spectra as a tool for the determination of the composition of human urinary calculi

1999 ◽  
Vol 19 (2) ◽  
pp. 249-253 ◽  
Author(s):  
Igor Kuzmanovski ◽  
Mira Trpkovska ◽  
Bojan Šoptrajanov ◽  
Viktor Stefov
Keyword(s):  
Factor Analysis ◽  
Fourier Transform ◽  
Infrared Spectra ◽  
Urinary Calculi ◽  
Fourier Transform Infrared ◽  
Fourier Transform Infrared Spectra

Least-Squares Curve-Fitting of Fourier Transform Infrared Spectra with Applications to Polymer Systems

1977 ◽  
Vol 31 (6) ◽  
pp. 518-524 ◽  
Author(s):  
M. K. Antoon ◽  
J. H. Koenig ◽  
J. L. Koenig
Keyword(s):  
Fourier Transform ◽  
Least Squares ◽  
Infrared Spectra ◽  
Curve Fitting ◽  
Fourier Transform Infrared ◽  
Polymer Systems ◽  
Fourier Transform Infrared Spectra ◽  
Least Squares Curve Fitting ◽  
Xylene Solution

A method is presented for least-squares curve-fitting of Fourier transform infrared spectra. A demonstration of the determination of xylene solution compositions illustrates the accuracy of the method. Least-squares coefficients are shown to be valuable for the analysis of several polymer systems by digital subtraction of spectra.

Factor Analysis Applied to Fourier Transform Infrared Spectra

1979 ◽  
Vol 33 (4) ◽  
pp. 351-357 ◽  
Author(s):  
Mitchell K. Antoon ◽  
Louis D'Esposito ◽  
Jack L. Koenig
Keyword(s):  
Factor Analysis ◽  
Fourier Transform ◽  
Infrared Spectra ◽  
Spectral Region ◽  
Fourier Transform Infrared ◽  
Model System ◽  
General Applicability ◽  
Polymer Systems ◽  
Number Of Components ◽  
Fourier Transform Infrared Spectra

The feasibility of applying the methods of factor analysis to Fourier transform infrared spectra is examined. The method is designed to determine the number of components contributing to a spectral region. The technique has been applied to a model system consisting of solutions of p−, o−, and m-xylenes. The method has also been used for calculating the number of independently absorbing species in several polymer systems. Spectral requirements and the general applicability of factor analysis are also discussed.

Environmentally Friendly Determination of Quality Parameters of Biodiesel/Diesel Blends Using Fourier Transform Infrared Spectra

2015 ◽  
Vol 92 (3) ◽  
pp. 309-315 ◽  
Author(s):  
Carla Felippi Chiella Ruschel ◽  
Chun Te Huang ◽  
Dimitrios Samios ◽  
Marco Flôres Ferrão ◽  
Carlos Itsuo Yamamoto ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectra ◽  
Environmentally Friendly ◽  
Fourier Transform Infrared ◽  
Quality Parameters ◽  
Fourier Transform Infrared Spectra

Factor Analysis and Fourier Transform Infrared Spectra of Compatible Blends of Polyphenylene Oxides and Polystyrene

1981 ◽  
Vol 35 (6) ◽  
pp. 543-548 ◽  
Author(s):  
J. L. Koenig ◽  
M. J. M. Tovar Rodriquez
Keyword(s):  
Factor Analysis ◽  
Fourier Transform ◽  
Infrared Spectra ◽  
Fourier Transform Infrared ◽  
Subtraction Technique ◽  
Number Of Components ◽  
Polyphenylene Oxide ◽  
Compatible System ◽  
Fourier Transform Infrared Spectra ◽  
Three Components

Fourier transform infrared spectra has been obtained of compatible blends of polyphenylene oxide (PPO) and polystyrene (PS). An incompatible blend of polyphenylene oxide and poly(4-chlorostyrene) (P4C1S) was also studied. Factor analysis was used to determine the number of components in the blend system. The data indicated that three components existed in the PPO/PS compatible system and only two in the PPO/P4C1S system. The interaction spectrum in the compatible blend was determined by a double-subtraction technique and used to analyze the blend system for the magnitude of the interaction as a function of composition. The interaction was maximum at a 70/30 composition in agreement with other data.

Synthesis, characterization, and their some chemical and biological properties of PVA/PAA/nPS hydrogel nanocomposites: Hydrogel and wound dressing

2020 ◽  
Vol 35 (3) ◽  
pp. 203-215
Author(s):  
Mehmet Emin Diken ◽  
Berna Koçer Kizilduman ◽  
Begümhan Yilmaz Kardaş ◽  
Enes Emre Doğan ◽  
Mehmet Doğan ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Acrylic Acid ◽  
Infrared Spectra ◽  
Vinyl Alcohol ◽  
Fourier Transform Infrared ◽  
Poly Vinyl Alcohol ◽  
Seed Particles ◽  
Fourier Transform Infrared Spectra ◽  
Hydrogel Nanocomposites ◽  
Poly Acrylic Acid

The nanocomposite hydrogels were prepared by dispersing of the nanopomegranate seed particles into poly(vinyl alcohol)/poly(acrylic acid) blend matrix in an aqueous medium by the solvent casting method. These hydrogels were characterized using scanning electron microscopy, Fourier transform infrared spectra, differential scanning calorimetry, and optical contact angle instruments. The nanopomegranate seed, blend, and hydrogel nanocomposites were tested for microbial activity. In addition, cytocompatibilities of these blend and hydrogel nanocomposites/composites were tested on human lymphocyte with in vitro MTS cell viability assays. Fourier transform infrared spectra revealed that esterification reaction took place among functional groups in the structure of poly(vinyl alcohol) and poly(acrylic acid). The hydrophilic properties of all hydrogels decreased with increasing nanopomegranate seed content. The mean diameters of the nanopomegranate seed particles were about 88 nm. Nanopomegranate seed particles demonstrated antibacterial properties against gram-positive bacteria, Staphylococcus aureus, and gram-negative bacteria, Escherichia coli. The lymphocyte viabilities increased after addition of nanopomegranate seeds into the polymer blend. The swelling behavior of blend and hydrogels was dependent on the cross-linking density created by the reaction between poly(vinyl alcohol)/poly(acrylic acid) blend and nanopomegranate seed. Scanning electron microscopy images were highly consistent with Fourier transform infrared spectra, differential scanning calorimetry, and antibacterial activity results.

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