infrared spectroscopy Articles | Environmental XPRT

Identification of a suitable sterilisation method for collagen derived from a marine Demosponge

Collagen is widely used as a biomedical material, and its importance is likely to grow as research and understanding progresses in this field. As a biomedical material, ensuring the sterility of collagen before use as, or incorporation into, a medical device is paramount. However, common sterilisation techniques can induce changes in the physical structure and protein chemistry of collagen, ...

Nov. 15, 2012

By Inderscience Publishers

Physico-chemical properties of SiOXNY thin films

The physico-chemical properties of silicon oxynitride (SiOXNY) thin films deposited by plasma enhanced chemical vapour deposition technique (PECVD) from a mixture of SiH4, NH3, N2O and N2 have been studied. The N2O flow rate was varied from 0 to 75 standard cubic centimetres per minute (sccm). When the oxygen content in the plasma is increased, the deposit composition changed from SiNx to SiOXNY. ...

Aug. 10, 2009

By Inderscience Publishers

Encoded photometric infrared spectroscopy

General Principle The EP-IR system contains the encoder-spectrograph, as well as a real-time embedded micro-processor for signal analysis, data treatment, and Chemometrics (quantitative) analysis in a single small-footprint enclosure. Operation Principle An infrared polychromatic beam is emitted from an external source (e.g. glow bar) onto the sample. Then it is either transmitted or reflected ...

Aug. 9, 2011

By CIC Photonics

The Universal Sampling Accessory

Infrared Spectroscopy (IR) is one of the most descriptive “tools” available to the analytical organic chemist both for qualitative identification and quantitative determination of single and mixed components. Classically, most samples have been prepared for scanning by transmission, where the thickness becomes a very critical factor in the quality of the final spectrum. If the sample is too ...

Jan. 1, 2006

By Buck Scientific Inc

Influence of the Structure of Acrylate Groups on the Flame Retardant Behavior of Ethylene Acrylate Copolymers Modified with Chalk and Silicone Elastomer

This study treats the flame retardant effects of different ethylene acrylate copolymers used in a chalk and silicone elastomer system, specifically the flame retardant chemistry and behavior at lower temperatures. The presence or absence of ester pyrolysis, formation of ionomers or other crosslinks, viscosity, and the effects of these factors on the formation and stability of the intumescent ...

Jul. 1, 2008

By SAGE Publications Ltd

Influence of the Structure of Acrylate Groups on the Flame Retardant Behavior of Ethylene Acrylate Copolymers Modified with Chalk and Silicone Elastomer

This study treats the flame retardant effects of different ethylene acrylate copolymers used in a chalk and silicone elastomer system, specifically the flame retardant chemistry and behavior at lower temperatures. The presence or absence of ester pyrolysis, formation of ionomers or other crosslinks, viscosity, and the effects of these factors on the formation and stability of the intumescent ...

Jul. 1, 2007

By SAGE Publications Ltd

On the possible optical resonance in carbon nanotubes based cavities

An enhanced interference phenomenon in the IR absorbance-wavenumber profiles of ship-shaped carbon nanotubes powder has been observed by attenuated total reflection at room temperature. This room temperature interference phenomenon was considered as possibly originating from an optical resonance effect and that single carbon nanotubes could act as individual Fabry-Perot or Lummer-Gehrcke resonant ...

Oct. 22, 2007

By Inderscience Publishers

Preparation and characterization of CTAB-HACC bentonite and its ability to adsorb phenol from aqueous solution

A novel type of adsorbent was prepared by modifying bentonite with N-2-hydroxypropyl trimethyl ammonium chloride chitosan (HACC) with cetyl trimethylammonium bromide (CTAB). The adsorbent was named CTAB-HACC bentonite. Its characteristics were investigated using thermogravimetric, Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction. The adsorption of phenol onto CTAB-HACC ...

Jan. 1, 2011

By IWA Publishing

Adsorption of lead using a novel xanthated carboxymethyl chitosan

Adsorption of Pb(II) was studied using a novel xanthated carboxymethyl chitosan (XCC). The XCC was synthesized using the xanthation reaction of N-carboxymethyl chitosan (NCMC). The chemical structure of XCC was characterized by UV–visible spectra. The effects of initial pH value of the solutions, contact time and adsorption isotherms on adsorption of Pb(II) were investigated. Moreover, ...

Jan. 29, 2014

By IWA Publishing

Adsorption behavior of phosphate on anion-functionalized nanoporous polymer

An anion-functionalized nanoporous polymer was successfully prepared by quaternary ammonization and anion-exchange treatment method. The polymer was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, N2 adsorption/desorption isotherms and thermogravimetric analysis. Batch experiments were conducted to investigate the adsorption behavior of phosphate on the ...

Jul. 19, 2017

By IWA Publishing

Infrared spectroscopy of human bone marrow: evidence of structural changes during acute leukemia

Fourier transform infrared (FTIR) spectroscopy was explored as a means to distinguish newly diagnosed of acute lymphoblastic leukemia from disease free bone marrow samples. Characteristic bands alterations were identified in both healthy and diseased samples arising from cellular protein, lipid and DNA. There were specific changes that affected the secondary structure of proteins that appeared in ...

Aug. 10, 2009

By Inderscience Publishers

Adsorptive removal of Rhodamine B from aqueous solution by nanoporous polydivinylbenzene

Nanoporous polydivinylbenzene (PDVB) material has been successfully prepared via the copolymerization of divinylbenzene monomers. The nanoporous PDVB was characterized through N2 adsorption/desorption isotherms, Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The nanoporous PDVB as an adsorbent was applied for the removal of Rhodamine B ...

Jan. 23, 2017

By IWA Publishing

Reduction of chromium (VI) from aqueous solution by biomass of Cladosporium cladosporioides

The capacity of Cladosporium cladosporioides biomass for removal of Cr(VI) in aqueous solutions was evaluated. A 2 × 2 factorial experiment design was used to study the effects of pH and biomass doses. Lower pH values and larger biomass doses increased the capacity of C. cladosporioides biomass for removal of Cr(VI), reaching a reduction capacity of 492.85 mg g−1, a significantly higher value ...

Jul. 17, 2017

By IWA Publishing

Synthesis of a novel magnetic polyacrylamide coagulant and its application in wastewater purification

In this study, a novel magnetic polyacrylamide (PAM) coagulant based on the core of magnetite (Fe3O4), with oleic acid serving as modifier and acrylamide as monomer, was synthesized to remove suspended solids in kaolin-suspended water. The composites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermo gravimetric analysis and scanning electron microscopy. ...

Oct. 26, 2016

By IWA Publishing

Modification of a Na-montmorillonite with quaternary ammonium salts and its application for organics removal from TNT red water

Na-montmorillonite (Na-Mont) and organic montmorillonite modified by cetyltrimethylammonium bromide (CTAB-Mont) and tetramethylammonium bromide (TMAB-Mont) were prepared as adsorbents to remove organic contaminants from 2,4,6-trinitrotoluene (TNT) red water. The characterizations of the samples were performed with X-ray diffraction and Fourier transform infrared spectroscopy. The adsorption ...

May 7, 2014

By IWA Publishing

Synthesis and application of surface-modified NiFe nanoparticles as a new magnetic nano adsorbent for the removal of nickel ions from aqueous solution

Surface-modified magnetic Ni2.33Fe alloy nanoparticles were prepared using a hydrothermal method. Thermogravimetric analysis (TG) and Fourier transform infrared spectroscopy (FTIR) tests demonstrated that the surface was successfully modified by sodium citrate. The surface-modified particles can be used for removing nickel ions from aqueous solution. The adsorption kinetics studies were ...

Aug. 11, 2017

By IWA Publishing

Preparation of monodisperse functionalised superparamagnetic nanoparticles

Monocrystalline iron oxide nanoparticles were synthesised by a one-pot procedure using iron salts in benzyl alcohol and functionalised with dopamine and carboxylmethylated dextran. Dextran macromolecules with low and high carboxyl contents were synthesised and grafted onto the dopamine-functionalised nanoparticles. The particles were characterised using X-ray photoelectron spectroscopy (XPS), ...

Aug. 7, 2007

By Inderscience Publishers

FT-IR spectroscopy as a tool for identification of apoptosis-induced structural changes in A549 cells treated with PM 701

Fourier transform infrared (FTIR) spectroscopy has been found useful for detecting apoptotic changes induced in human lung cancer cells (A549) that treated with PM 701 (natural product) in tissue culture level. Characteristic bands alterations were identified in the apoptotic cells arising from cellular protein, lipid and DNA, there were specific changes that affected the secondary structure of ...

Aug. 10, 2009

By Inderscience Publishers

Comparative
<i>in situ</i>
PET biodegradation assay using indigenously developed consortia

Comparative in situ PET biodegradation assay using indigenously developed consortia

A soil burial test was carried out to evaluate the biodegradation of polyethylene terephthalate under natural environment for a period of six months in presence of three different indigenously developed bacterial consortia. These consortia comprised of potential polymer-degrading bacterial cultures isolated from various waste disposal sites. The comparative biodegradation of PET samples in ...

Apr. 24, 2014

By Inderscience Publishers

Carbonized medlar-core particles as a new biosorbent for removal of Cu2+ from aqueous solution and study of its surface morphology

The objective of this study was to investigate the use of carbonized medlar-core particles as a new biosorbent to remove Cu2+ from aqueous solution. Fourier transform infrared spectroscopy and scanning electron microscopy were used to characterize the biosorbent. This paper reports the effects of adsorbent dose, pH, temperature and concentration of adsorbate. Batch isotherm studies were also ...

Apr. 27, 2016

By IWA Publishing

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