scholarly journals Prediction of fat globule particle size in homogenized milk using Fourier transform mid-infrared spectra

2016 ◽  
Vol 99 (11) ◽  
pp. 8549-8560 ◽  
Author(s):  
Larissa Di Marzo ◽  
Patrick Cree ◽  
David M. Barbano
Keyword(s):  
Particle Size ◽  
Fourier Transform ◽  
Infrared Spectra ◽  
Mid Infrared ◽  
Fat Globule

Transformations to reduce the effect of particle size in mid-infrared spectra of biomass

The Analyst ◽  
2018 ◽  
Vol 143 (21) ◽  
pp. 5191-5201
Author(s):  
Borja Cantero-Tubilla ◽  
Larry P. Walker
Keyword(s):  
Particle Size ◽  
Fourier Transform ◽  
Chemical Composition ◽  
Ftir Spectroscopy ◽  
Infrared Spectra ◽  
Mid Infrared ◽  
Powerful Technique ◽  
Effect Of Particle Size ◽  
Chemical Pretreatments

Fourier Transform InfraRed (FTIR) spectroscopy is a very powerful technique for the characterization of the chemical composition of biomass and its modifications occurring during thermochemical and chemical pretreatments.

Fourier Transform Infrared Reflectance Microspectroscopy Study of Bacillus Subtilis Engineered without Dipicolinic Acid: The Contribution of Calcium Dipicolinate to the Mid-Infrared Absorbance of Bacillus Subtilis Endospores

2005 ◽  
Vol 59 (7) ◽  
pp. 893-896 ◽  
Author(s):  
D. L. Perkins ◽  
C. R. Lovell ◽  
B. V. Bronk ◽  
B. Setlow ◽  
P. Setlow ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Fourier Transform ◽  
Infrared Spectra ◽  
Dipicolinic Acid ◽  
Fourier Transform Infrared ◽  
Difference Spectrum ◽  
Genetically Engineered ◽  
Mid Infrared ◽  
Spectral Contribution ◽  
Ir Reflectance

Mid-infrared spectra of spores of two strains of Bacillus subtilis, PS832 (wild-type) and FB122 ( sleB spoVF), that are isogenic except for the two mutations in FB122 were obtained by Fourier transform infrared (FT-IR) reflectance microspectroscopy. The mutations in FB122 cause the spores of this strain to be devoid of dipicolinic acid (pyridine-2,6-dicarboxylic acid; DPA), a biomarker characteristic of bacterial spores. Analysis of these two strains by difference spectroscopy revealed a spectrum similar to that of calcium dipicolinate (CaDPA), a chelate salt of DPA. This difference spectrum was compared to mid-infrared spectra of both DPA and CaDPA, and was attributed to CaDPA only. This is the first report known to the authors of a genetically engineered organism being used to identify the spectral contribution of a particular cellular component.

Mixed Alkali Halide Dilution Matrices for Diffuse Reflectance Infrared Spectrometry: Effect of Particle Size

1989 ◽  
Vol 43 (8) ◽  
pp. 1293-1294 ◽  
Author(s):  
Mollie L. E. Tevrucht ◽  
Peter R. Griffiths
Keyword(s):  
Particle Size ◽  
Fourier Transform ◽  
Infrared Spectra ◽  
Alkali Halide ◽  
Diffuse Reflectance ◽  
Fourier Transform Infrared ◽  
Infrared Spectrometry ◽  
Mixed Alkali ◽  
Effect Of Particle Size ◽  
Diffuse Reflectance Infrared

Diffuse reflectance Fourier transform infrared spectra of coal diluted in two different alkali halide matrices were compared. Pure KBr and mixed CsI/KBr were tested for use as dilution matrices. When the variable of particle size was controlled, KBr was found to be the better diluent.

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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