نتایج جستجو برای: ft ir spectra

تعداد نتایج: 180468  

Journal: :Microbiology 2006
Catherine L Winder Stephen V Gordon James Dale R Glyn Hewinson Royston Goodacre

Mycobacterium bovis is the causative agent of bovine tuberculosis. Various genetic typing techniques have been used to trace the reservoirs of infection; however, they have limited success in population genetics and outbreak studies. Fourier-transform infrared spectroscopy (FT-IR) is a rapid phenotypic typing technique, which may be used to generate a metabolic fingerprinting and is increasingl...

2016
V. Karunakaran V. Balachandran

In the present work, we reported a combined experimental and theoretical study on molecular structure and vibrational analysis of N-phenylethanolamine (NPEA). FT-IR and FT-Raman spectra of the title compound in the solid phase are recorded in the region 4000–400 cm and 3500–100 cm, respectively. The structural and spectroscopic data of the molecule in the ground state is calculated using densit...

2014
Qinghua Feng Jinling Li Heli Cheng Fangeng Chen Yimin Xie

A porous lignin-containing hydrogel was developed for dye removal via graft copolymerization of acetic acid lignin (AAL) and acrylamide (AAm), in the presence of ethyleneglycol dimethacrylate (EGDMA) as a crosslinker and H2O2 as an initiator. AAL was characterized by FT-IR and TGA. After being washed to remove impurities, the hydrogel was characterized by FT-IR, TGA, SEM, and swelling ratio. FT...

2012
Sri Kumaran

Nickel and mercury are naturally occurring, highly toxic environmental pollutant. The goal of the present study was investigate the effects of nickel and mercury exposure on the biochemical contents of the muscles tissues of fish Lates calcarifer by using Fourier transform infrared (FT-IR) spectroscopy. FT-IR spectra reveal significant differences in absorbance intensities between the control. ...

Journal: :Applied and environmental microbiology 2002
David I Ellis David Broadhurst Douglas B Kell Jem J Rowland Royston Goodacre

Fourier transform infrared (FT-IR) spectroscopy is a rapid, noninvasive technique with considerable potential for application in the food and related industries. We show here that this technique can be used directly on the surface of food to produce biochemically interpretable "fingerprints." Spoilage in meat is the result of decomposition and the formation of metabolites caused by the growth a...

2012
Xiang Li Qing-Bo Li Guang-Jun Zhang Yi-Zhuang Xu Xue-Jun Sun Jing-Sen Shi Yuan-Fu Zhang Jin-Guang Wu

Cancer is a disease that does great harms to the health of human beings. FT-IR spectroscopy could identify variability at the molecular level in biological specimens. It is a rapid and noninvasive method, which could be used intraoperatively to modify surgical procedures. The aim of this paper is to identify and separate cancer from colitis in endoscopic colon biopsies through the use of FT-IR ...

2011
Milena Povolo Giovanni Cabassi Mauro Profaizer Silvia Lanteri

The analysis of volatile compounds for food products characterization is currently performed by gas chromatographic separation, often coupled with mass spectrometry. In our research the possibility of the application of the Fourier-transform infrared spectroscopy (FT-IR) technique to the cheese volatile fraction evaluation was investigated. An Evolved Gas Analysis (EGA) FT-IR prototype, develop...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2011
nazila esmaeili hossein kazemian dariush bastani

lta zeolite nanoparticles was successfully synthesized from clear solution under controlled conditions using hydrothermal method using tetramethyl ammonium hydroxide as a structural directing agent. the as-synthesized lta zeolite particles were characterized by powder x-ray diffraction (xrd) analysis, scanning electron microscopy (sem), fourier transform infrared (ft-ir) spectroscopy, energy di...

Journal: :physical chemistry research 2015
hassan behnejad manoochehr fathollahi muhammad shadman

this research is aimed to undertake a comparative study on stability and thermal degradation kinetics of un-irradiated and high energy protons irradiated polyvinyl butyral (pvb) based on weight loss analysis and non-isothermal approaches. the weight loss by the un-irradiated pvb upon heating was found to be in two stages but due to high energy protons accelerated exposure following by chemical ...

Journal: :reports of biochemistry and molecular biology 0
rohollah taghadosi department of microbiology and virology, kerman university of medical sciences, kerman, iran. mohammad reza shakibaie tel: +98 341- 9133408226; fax: +98 341- 3221671 shalaleh masoumi department of microbiology and virology, kerman university of medical sciences, kerman, iran.

background: n-acyl homoserine lactone (ahl) is found to be the main component of quorum sensing (qs) in gram-negative bacteria and plays an important role in biofilm formation. little information is available regarding the role of ahl in biofilm formation in escherichia coli (e. coli). the purpose of this investigation was to biochemically detect and characterize ahl activity in biofilm-forming...

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