نتایج جستجو برای: ftir spectroscopy

تعداد نتایج: 181847  

Journal: :international journal of nanoscience and nanotechnology 2015
m. nadafan r. malekfar z. dehghani

in this research the composition of polyurethane closed cell (pucc) with two different concentrations of sio2 nanoparticles (1.0 and 2.0 wt%) have been prepared. optical microscopy and sem imaging, watering uptake, ftir and raman spectroscopy of the synthesized samples were carried out. the optical microscopy imaging of samples showed differences in the appearance of matrix produced by applying...

Journal: :research in pharmaceutical sciences 0

Journal: :Critical reviews in biochemistry and molecular biology 1995
M Jackson H H Mantsch

Fourier transform infrared (FTIR) spectroscopy is an established tool for the structural characterization of proteins. However, many potential pitfalls exist for the unwary investigator. In this review we critically assess the application of FTIR spectroscopy to the determination of protein structure by (1) outlining the principles underlying protein secondary structure determination by FTIR sp...

Journal: :Journal of agricultural and food chemistry 2005
Robert A Cocciardi Ashraf A Ismail Jacqueline Sedman

A new Fourier transform infrared (FTIR) spectroscopic method based on single-bounce attenuated total reflectance (SB-ATR) spectroscopy was developed for the analysis of distilled liquors and wines. For distilled liquors, a partial least-squares (PLS) calibration was developed for alcohol determination based on the SB-ATR/FTIR spectra of mixtures of ethanol and distilled water. An independent se...

Journal: :iranian journal of pharmaceutical research 0
azadeh ashtarinezhad department of toxicology, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran. farshad h. shirazi 1- department of toxicology, school of pharmacy, shahidbeheshti university of medical sciences, tehran, iran. 2-pharmaceutical sciences research center, shahid beheshti university of medical sciences, tehran, iran. hossein vatanpour department of toxicology, school of pharmacy, shahidbeheshti university of medical sciences, tehran, iran baharak mohamazadehasl department of toxicology, school of pharmacy, shahidbeheshti university of medical sciences, tehran, iran ataolla panahyab young researchers club, science and research branch, islamic azad university, tehran, iran. maryam nakhjavani 1department of toxicology, school of pharmacy, shahidbeheshti university of medical sciences, tehran, iran

metronidazole is used to treat trichomoniasis, bacterial vaginosis, and other diseases. there are controversy aspects about its teratogenicity. a teratogenic agent can alter morphology or subsequent function of the fetus. the aim of this study was to examine an alternative method for the recognition of the mechanism or the bimolecular potential changes in mice fetus caused by metronidazole usin...

Journal: :iranian journal of pharmaceutical sciences 0
maryam ghassemi department of toxico/pharmacology, school of pharmacy, shahid beheshti medical university, tehran, iran farshad hosseini shirazi department of toxico/pharmacology, school of pharmacy, shahidbeheshti medical university, tehriran. pharmaceutical sciences research center, shahidbeheshti medical university, tehran, iran.

evaluation of pre-fixed biological tissues preparation methods for atr-ftir biospectroscopy fourier transform infrared (ftir) spectroscopy in atr (attenuated total reflection) mode is a powerful tool for studying biomedical samples, which can provide important structural information on the molecular composition. currently, formalin fixation and paraffin preservation (ffpp) is the preferred source ...

2004
M. HERMAN

In FT-ICLAS, the aim is to improve the absorption detection sensitivity. The experiment combines IntraCavity Laser Absorption Spectroscopy (ICLAS) with FTIR spectroscopy. ICLAS is a well known instrumental technique in which a sample is inserted in a cell placed inside a broadband, multimode laser cavity. The laser is operating in pulsed mode and intracavity absorption rises as the laser wave b...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد شاهرود - دانشکده مهندسی شیمی 1393

در این پژوهش نحوه ساخت نانوکامپوزییت eva/ag و اثر ضد میکروبی آن در درصدهای مختلف نانو ذره نقره مورد بررسی قرار گرفته است.نانوکامپوزیت حاصل از نطر شکل شناختی ، اندازه ذرات، ساختمان شیمیایی ، با استفاده از تستهای sem(scanning electrou microscopy)،tem (transmission electron microscope) ، xrd (x-ray fluorescence spectroscopy) ،ftir (fourier transform infrared spectroscopy) مورد ارزیابی قرار گرفت. د...

2016
Andreas Schwaighofer Mirta R. Alcaráz Can Araman Héctor Goicoechea Bernhard Lendl

Fourier transform infrared (FTIR) and circular dichroism (CD) spectroscopy are analytical techniques employed for the analysis of protein secondary structure. The use of CD spectroscopy is limited to low protein concentrations (<2 mg ml(-1)), while FTIR spectroscopy is commonly used in a higher concentration range (>5 mg ml(-1)). Here we introduce a quantum cascade laser (QCL)-based IR transmis...

Journal: :iranian journal of pharmaceutical research 0
rezvan zendehdel pharmaceutical research center, shahid beheshti university of medical sciences, tehran, iran. ali masoudi-nejad pharmaceutical research center, shahid beheshti university of medical sciences, tehran, iran. javad mohammadzadeh pharmaceutical research center, shahid beheshti university of medical sciences, tehran, iran. farshad h. shirazi pharmaceutical research center, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran. school of pharmacy, shahid beheshti university of medical sciences, tehran, iran.

cisplatin is a common chemotherapeutic agent that used for treatment of many solid cancers. rapid identification of chemotherapy resistance is very important and may lead to effective treatment plan. spectroscopy techniques, such as infrared spectroscopy, which are sensitive to biochemical composition of samples, have shown potentials to discriminate tissues. developing in fourier transform inf...

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