Imaging of lipids in atherosclerotic lesion in aorta from ApoE/LDLR−/− mice by FT-IR spectroscopy and Hierarchical Cluster Analysis

The Analyst ◽  
2011 ◽  
Vol 136 (24) ◽  
pp. 5247 ◽  
Author(s):  
Tomasz P. Wrobel ◽  
Lukasz Mateuszuk ◽  
Stefan Chlopicki ◽  
Kamilla Malek ◽  
Malgorzata Baranska
Keyword(s):  
Cluster Analysis ◽  
Ir Spectroscopy ◽  
Hierarchical Cluster Analysis ◽  
Atherosclerotic Lesion ◽  
Hierarchical Cluster ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

scholarly journals Classification of Five Kinds of Moss Plants with the Use of Fourier Transform Infrared Spectroscopy and Chemometrics

2011 ◽  
Vol 25 (6) ◽  
pp. 271-285 ◽  
Author(s):  
Tao Hu ◽  
Wen-Ying Jin ◽  
Cun-Gui Cheng
Keyword(s):  
Cluster Analysis ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
Ir Spectra ◽  
Fourier Transform Infrared Spectroscopy ◽  
Moss Species ◽  
Ft Ir ◽  
And Cluster Analysis ◽  
Ft Ir Spectroscopy

Fourier transform infrared spectroscopy (FT-IR) with Horizontal Attenuated Total Reflectance (HATR) techniques is used to obtain the FT-IR spectra of five kinds of mosses, such asPtychomitrium dentatum(Mitt.) Jaeg.,Ptychomitrium polyphylloides(C. Muell.) Par.,Ptychomitrium sinense(Mitt.) Jaeg.,Macromitrium syntrichophyllumTher. Etp. Vard., andMacromitrium ferrieiCard. Sz Ther. Based on the comparison of the above mosses in the FT-IR spectra, the region ranging from 4000 to 650 cm−1was selected as the characteristic spectra for analysis. Principal component analysis (PCA) and cluster analysis are considered to identify the five moss species. Because they belong to the homogeneous plants, and have similar chemical components and close FT-IR spectroscopy, PCA and cluster analysis can only give a rough result of classification among the five moss species, Fourier self-deconvolution (FSD) and discrete wavelet transform (DWT) methods are used to enhance the differences between them. We use these methods for further study. Results show that it is an excellent method to use FT-IR spectroscopy combined with FSD and DWT to classify the different species in the same family. FT-IR spectroscopy combined with chemometrics, such as FSD and DWT, can be used as an effective tool in systematic research of bryophytes.

scholarly journals Application of FT-IR Spectroscopy for Investigation of Pink Water Remediation by Pine Bark

2015 ◽  
Vol 9 (1) ◽  
pp. 67-75
Author(s):  
Mara Grube ◽  
Olga Chusova ◽  
Marita Gavare ◽  
Karlis Shvirksts ◽  
Emma Nehrenheim ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Ir Spectroscopy ◽  
Low Cost ◽  
Screening Method ◽  
Pine Bark ◽  
Water Remediation ◽  
Hydroxyl Groups ◽  
Ft Ir ◽  
Phenolic Hydroxyl Groups ◽  
Ft Ir Spectroscopy

This study demonstrates the application of FT-IR spectroscopy for investigating the remediation of pink water with the low cost adsorbent pine bark. The removal of 2,4,6-trinitrotoluene (TNT) from pink water by adsorption to pine bark was accompanied by a reduction in intensities of peaks at 1544 and 1347 cm in the spectra of acetonitrile extracts of the pine bark. Hierarchial cluster analysis differentiated samples with high (30-180 mg/L) and low (0-4 mg/L) TNT concentrations, demonstrating the potential of this approach as a quick screening method for the control of the removal of TNT from pink water. The amount of lignin in pine bark was inversely proportional to the size of the pine bark particles, while the concentration of phenolic hydroxyl groups increases with increasing size of pine bark particles. FT-IR spectra showed that as well as TNT, pine bark can also adsorb nitramine explosives such as RDX and HMX.

scholarly journals Study of chronic lymphocytic leukemia cells by FT-IR spectroscopy and cluster analysis

1996 ◽  
Vol 20 (8) ◽  
pp. 649-655 ◽  
Author(s):  
Christian P. Schultz ◽  
Kan-zhi Liu ◽  
James B. Johnston ◽  
Henry H. Mantsch
Keyword(s):  
Cluster Analysis ◽  
Chronic Lymphocytic Leukemia ◽  
Ir Spectroscopy ◽  
Lymphocytic Leukemia ◽  
Leukemia Cells ◽  
Ft Ir ◽  
And Cluster Analysis ◽  
Ft Ir Spectroscopy

scholarly journals Application of FT-IR Spectroscopy for Fingerprinting ofZymomonas mobilisRespiratory Mutants

2012 ◽  
Vol 27 ◽  
pp. 581-585 ◽  
Author(s):  
M. Grube ◽  
R. Rutkis ◽  
M. Gavare ◽  
Z. Lasa ◽  
I. Strazdina ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Nucleic Acids ◽  
Ir Spectra ◽  
Parent Strain ◽  
Hierarchical Cluster ◽  
Knockout Mutant ◽  
Growth Environment ◽  
Ft Ir ◽  
Macromolecular Composition ◽  
Ft Ir Spectroscopy

Z. mobilisATCC 29191 and its respiratory knockout mutants,kat-, ndh-, cytB-,andcydB-, were grown under anaerobic and aerobic conditions. FT-IR spectroscopy was used to study the variations of the cell macromolecular composition. Quantitative analysis showed that the concentration ratios—nucleic acids to lipids, forZ. mobilisparent strain,kat-, ndh-, cytB-,andcydB-strains, clearly distinguishedZ. mobilisparent strain from its mutant derivatives and corresponded fairly well to the expected degree of biochemical similarity between the strains. Two different FT-IR-spectra hierarchical cluster analysis (HCA) methods were created to differentiateZ. mobilisparent strain and respiratory knockout mutant strains. HCA based on discriminative spectra ranges of carbohydrates, nucleic acids, and lipids allowed to evaluate the influence of growth environment (aeration, growth phase) on the macromolecular composition of cells and differentiate the strains. HCA based on IR spectra of inoculums, in a diagnostic region including the characteristic nucleic acid vibration modes, clearly discriminated the strains under study. Thus it was shown that FT-IR spectroscopy can distinguish various alterations ofZ. mobilisrespiratory metabolism by HCA of biomass spectra.

Multiscale exploration of hydrocarbons adsorption and hopping through the ZSM-5 channels - from Monte Carlo modelling to experiment

2021 ◽  
Author(s):  
Maciej Strzempek ◽  
Karolina A. Tarach ◽  
Kinga Góra-Marek ◽  
Fernando Rey ◽  
Miguel Palomino ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Ir Spectroscopy ◽  
Aliphatic Hydrocarbons ◽  
Adsorption Studies ◽  
Ft Ir ◽  
Gravimetric Adsorption ◽  
Hydrocarbons Adsorption ◽  
Ft Ir Spectroscopy

Abstract In this article the results of the statistical MC modelling corroborated by the FT-IR spectroscopy and gravimetric adsorption studies of the low aliphatic hydrocarbons in ZSM-5 (Si/Al =28 or...

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