In situ FT-IR spectroscopy investigations of dimethyl carbonate synthesis: on the contribution of gas-phase species

ABSTRACTThis study was designed to develop a rapid, sensitive, accurate, and inexpensive Fourier Transform Infrared Reflectance (FT-IR) Spectroscopy coupled with Principle Component Analysis (PCA) as a detection technique to evaluate the solubility of 11-Keto-β-Boswellic acid (KBA), from the gum resin extracted from the Omani frankincense, (Boswellia sacra) in the liver of STZ induced diabetic mice. This study also investigated the effect of KBA on the histological changes of hepatocytes of diabetic mice. Liver tissue samples from three groups of mice included normal control group, diabetic control group and diabetic group treated IP with KBA were scanned with FT-IR spectrophotometer in the reflection mode. FT-IR Spectra were collected in the wavenumber range from 400 to 4000cm-1 using ATR accessorry. The results of FT-IR Spectra were analyzed by using multivariate method Principle Component Analysis. The PCA score plot is an exploratory multivariate method indicated that there was a complete segregation among the three groups of liver samples based on change in variation of position of wavenumber in FT-IR spectra, which revealed that there is a clear effect of KBA solubility on treatments. The histological features showed an improvement in the liver tissues with normal structures of hepatocytes with exhibiting mild vacuolations in their cytoplasm. In conclusion, reflectance FT-IR spectroscopy coupled with PCA could be deployed as a new detection method for rapid, low cost and non-destructive method for evaluating of treatment effects in diseased liver tissue based on the solubility of KBA. Histological findings demonstrated the protective effective of KBA on improving the morphology of liver tissue in diabetic mice which resulted in complete recovery to the damage observed in diabetic control group.Summary StatementReflectance FT-IR spectroscopy coupled with PCA has been deployed as a new rapid, inexpensive and non-destructive detection method to examine the solubility of 11-keto-β-Boswellic acid (KBA) in streptozotocin (STZ) induced-diabetes mice liver tissue following intraperitoneal treatment. Moreover, microscopic study of liver tissue histopathology revealed that KBA has a protecting effect against STZ damage.

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Monitoring the Interfacial Polymerization of Piperazine and Trimesoyl Chloride with Hydrophilic Interlayer or Macromolecular Additive by in-situ FT-IR Spectroscopy

10.20944/preprints201911.0012.v1 ◽

2019 ◽

Author(s):

Xi Yang

Keyword(s):

Ir Spectroscopy ◽

Reaction Rate ◽

Interfacial Polymerization ◽

Reaction System ◽

Reaction Rates ◽

Water Permeation ◽

Ft Ir ◽

Trimesoyl Chloride ◽

Ft Ir Spectroscopy

The interfacial polymerization (IP) of piperazine (PIP) and trimesoyl chloride (TMC) has been extensively utilized to synthesize the nanofiltration (NF) membrane. However, it is still a huge challenge to monitor the IP reaction, because of the fast reaction rate and the formed ultra-thin film. Herein, two effective strategies are applied to reduce the IP reaction rate: (1) the introduction of hydrophilic interlayers between the porous substrate and the formed polyamide layer; (2) the addition of macromolecular additives in the aqueous solution of PIP. As a result, in-situ FT-IR spectroscopy was firstly used to monitor the IP reaction of PIP/TMC reaction system, with hydrophilic interlayers or macromolecular additives. Moreover, we study the formed polyamide layer growth on the substrate, in a real-time manner. The in-situ FT-IR experimental results confirm that the IP reaction rates are effectively suppressed and the formed polyamide thickness reduces from 138±24 nm to 46±2 nm. Furthermore, the optimized NF membrane with excellent performance are consequently obtained, which include the boosted water permeation flux about 141~238 (L·m2·h/MPa) and superior salt rejection of Na2SO4 > 98.4%.

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Ethylene polymerization on a SiH4-modified Phillips catalyst: detection of in situ produced α-olefins by operando FT-IR spectroscopy

Physical Chemistry Chemical Physics ◽

10.1039/c2cp23269c ◽

2012 ◽

Vol 14 (7) ◽

pp. 2239 ◽

Cited By ~ 23

Author(s):

Caterina Barzan ◽

Elena Groppo ◽

Elsje Alessandra Quadrelli ◽

Vincent Monteil ◽

Silvia Bordiga

Keyword(s):

Ir Spectroscopy ◽

Ethylene Polymerization ◽

Phillips Catalyst ◽

Ft Ir ◽

Ft Ir Spectroscopy

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Application of FT-IR spectroscopy in detection of food hydrocolloids in confectionery jellies and food supplements

Czech Journal of Food Sciences ◽

10.17221/6575-cjfs ◽

2013 ◽

Vol 19 (No. 2) ◽

pp. 51-56 ◽

Cited By ~ 45

Author(s):

J. Čopíková ◽

M. Černá ◽

M. Novotná ◽

J. Kaasová ◽

A. Synytsya

Keyword(s):

Ir Spectroscopy ◽

Ir Spectra ◽

Food Products ◽

Food Supplements ◽

Ft Ir ◽

Ft Ir Spectroscopy

FT-IR spectra of isolated high molecule fractions were measured and used for identification of food hydrocolloids in confectionery jellies and food supplements. The simple comparison of spectra of standards and samples proved that this technique is useful for the monitoring of food hydrocolloids in particular food products.

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