in this work, hydrogel nanocomposites were synthesized by solution polymerization of acrylic acid (aa) and itaconic acid (ia) in the presence of cotton fabric. ammonium persulfate (aps) was used as the polymerization initiator in the presence of a crosslinker, methylene bisacrylamide (mba). insertion of ag followed by reduction of ag+ cations results in a hydrogel nanocomposite. the structure a...

the aim of the present study was to prepare nano-sized calcium fluoride (caf2). calcium fluoride nanoparticles were synthesized by cacl2.6h2o and ammonium fluoride. nanoparticles were synthesized by co-precipitation method. the synthesized nanocrystals were characterized by x-ray diffraction (xrd), fourier transform infrared spectroscopy (ftir), scanning electron microscopy (sem). the crystalli...

Modifications of phenylalanine amino acid after its exposure to near-infrared (NIR) radiation have been investigated using ATRFTIR (Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy). The process of amino acid aggregation after its exposure to NIR has been observed. A possible mechanism of amino acid dimer formation has been proposed with the help of theoretical calculations ...

Pollution from vehicles is a serious concern for the environment and human health. Vehicle emission regulations worldwide have limits pollutants such as hydrocarbons, CO, NOx. The measurements are typically conducted at engine dynamometers (heavy-duty engines) sampling tailpipe or chassis (light-duty vehicles) dilution tunnel. latest focused on actual emissions of road. Greenhouse gases (GHG) (...

this study was carried out to determine the protein and carbohydrate molecular structure of sorghum cultivars using fourier transform infrared spectroscopy (ftir) with multivariate molecular spectroscopy analyses. sorghum cultivars included: 1- kimia, 2- sepideh, 3- m2 and 4- m8. protein and carbohydrate molecular functional groups studied included: peak area and height amide i, amide ii, α-hel...

Direct detection of saponins in medicinal plants using Fourier Transform Infrared (FTIR) spectroscopy is reported in this paper. Crude dry plant powders were mixed with potassium bromide (KBr) powder and compressed to a thin pellet for infrared examination. FTIR spectra of the test samples showed -OH, -C=O, C-H, and C=C absorptions characteristic of oleanane triterpenoid saponins. The C-O-C abs...