Qualitative Analysis of Thin Films of Crude Oil Deposits on the Metallic Substrate by Fourier Transform Infrared (FTIR) Microscopy

2005 ◽  
Vol 19 (5) ◽  
pp. 2001-2005 ◽  
Author(s):  
N. Batina ◽  
A. Reyna-Cordova ◽  
Y. Trinidad-Reyes ◽  
M. Quintana-Garcia ◽  
E. Buenrostro-Gonzalez ◽  
...  
Keyword(s):  
Thin Films ◽  
Fourier Transform ◽  
Qualitative Analysis ◽  
Crude Oil ◽  
Fourier Transform Infrared ◽  
Metallic Substrate ◽  
Ftir Microscopy ◽  
Oil Deposits

scholarly journals Plaster Characterization at the PPNB Site of Yiftahel (Israel) Including the Use of 14C: Implications for Plaster Production, Preservation, and Dating

Radiocarbon ◽  
2012 ◽  
Vol 54 (3-4) ◽  
pp. 887-896 ◽  
Author(s):  
Kristin M Poduska ◽  
Lior Regev ◽  
Francesco Berna ◽  
Eugenia Mintz ◽  
Ianir Milevski ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Crystal Lattice ◽  
High Temperatures ◽  
Fourier Transform Infrared ◽  
Ftir Spectra ◽  
Stable Carbon ◽  
Calcite Crystal ◽  
Surface Layers ◽  
Ftir Microscopy ◽  
Fine Grained

The Pre-Pottery Neolithic B (PPNB) site of Yiftahel, Israel, contains abundant plaster floors. We surveyed the states of preservation of the plasters using an infrared spectroscopic assay that characterizes the extent of disorder of the atoms in the calcite crystal lattice. We identified the 3 best-preserved plaster samples that had disorder signatures most similar to modern plaster. We then studied the surface layers, fine-grained matrices, and large aggregates of these samples using micromorphology, Fourier transform infrared (FTIR) microscopy, stable carbon and radiocarbon concentrations. Even though some of the plaster components have a geogenic appearance in micromorphology slides and in FTIR spectra, the 14C analyses show that all components were exposed to high temperatures and as a result were equilibrated with the 14C content of the atmosphere ∼10,000 yr ago. This implies that the plasters at Yiftahel were produced entirely from heat-altered calcite. We also show that these plasters have undergone significant diagenesis. The plaster component with the most disordered atomic signature, and hence the most similar in this respect to modern plaster, did indeed produce a 14C date close to the expected age.

scholarly journals Identification of Contaminated Cells with Viruses, Bacteria, or Fungi by Fourier Transform Infrared Microspectroscopy

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
V. Erukhimovitch ◽  
M. Huleihil ◽  
M. Huleihel
Keyword(s):  
Cell Culture ◽  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Vero Cells ◽  
Ftir Microscopy ◽  
E Coli ◽  
Infrared Microspectroscopy ◽  
Fourier Transform Infrared Microspectroscopy ◽  
Simplex Virus

Fourier transform infrared microspectroscopy (FTIR-M) can detect small molecular changes in cells and therefore was previously applied for the identification of different biological samples. In the present study, FTIR spectroscopy was used for the identification and discrimination of Vero cells infected with herpes viruses or contaminated with bacteria or fungi in cell culture. Vero cells in culture were infected herpes simplex virus type 1 (HSV-1) or contaminated withE. colibacteria orCandida albicansfungi and analyzed by FTIR microscopy at 24 h postinfection/contamination. Specific different spectral changes were observed according to the infecting or contaminating agent. For instance, both pure fungi and cell culture contaminated with this fungi showed specific peaks at 1030 cm−1and at 1373 cm−1regions, while pureE. coliand cell culture contaminated with this bacteria showed a specific and unique peak at 1657 cm−1. These results support the potential of developing FTIR microspectroscopy as a simple, reagent free method for identification and discrimination between different tissue infection or contamination with various pathogens.

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