نتایج جستجو برای: ft ir measurements

تعداد نتایج: 440498  

Journal: :Journal of applied microbiology 2004
C L Winder E Carr R Goodacre R Seviour

AIMS Fourier transform infrared (FT-IR) was used to analyse a selection of Acinetobacter isolates in order to determine if this approach could discriminate readily between the known genomic species of this genus and environmental isolates from activated sludge. METHODS AND RESULTS FT-IR spectroscopy is a rapid whole-organism fingerprinting method, typically taking only 10 s per sample, and ge...

2014
Samy Nagib Jörg Rau Osama Sammra Christoph Lämmler Karen Schlez Michael Zschöck Ellen Prenger-Berninghoff Guenter Klein Amir Abdulmawjood

The present study was designed to investigate the potential of Fourier transform infrared (FT-IR) spectroscopy to identify Trueperella (T.) pyogenes isolated from bovine clinical mastitis. FT-IR spectroscopy was applied to 57 isolates obtained from 55 cows in a period from 2009 to 2012. Prior to FT-IR spectroscopy these isolates were identified by phenotypic and genotypic properties, also inclu...

2014
Chayan Wan Wenqing Cao Cungui Cheng

Sprague-Dawley (SD) rats' normal and abnormal pancreatic tissues are determined directly by attenuated total reflectance Fourier transform infrared (ATR-FT-IR) spectroscopy method. In order to diagnose earlier stage of SD rats pancreatic cancer rate with FT-IR, a novel method of extraction of FT-IR feature using discrete wavelet transformation (DWT) analysis and classification with the probabil...

Journal: :Physicochemical Problems of Mineral Processing 2023

Flotation is the most known beneficiation method for separation of complex and refractory iron ores. As a typical iron-containing silicates, it difficult to separate chlorite from specularite, because similar surface physicochemical properties. In this study, selective depression effect sodium hexametaphosphate (SHMP) was conducted via cationic micro-flotation. The adsorption mechanism between ...

2017
Tibebe Lemma Fabiano de Barros Souza Claudio A Tellez Soto Airton A Martin

We have studied the Fourier Transform Infrared (FT-IR) and the Fourier transform Raman (FT-Raman) spectra of stanozolol and oxandrolone, and we have performed quantum chemical calculations based on the density functional theory (DFT) with a B3LYP/6-31G (d, p) level of theory. The FT-IR and FT-Raman spectra were collected in a solid phase. The consistency between the calculated and experimental ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده مهندسی 1390

یکی از عواملی که موجب بروز ترک ها در سطح روسازی می شود، پیرشدگی قیر است. پیرشدگی قیر بر اثر تبخیر برخی از ترکیبات فرار قیر در مرحله تولید مخلوط آسفالتی و اکسید شدن برخی از ترکیبات قیر به وجود می آید. پیرشدگی موجب سخت تر شدن و شکننده شدن قیر می شود که منجر به تشکیل و گسترش ترکها در سطح روسازی و در نهایت تخریب روسازی می شود. در این پژوهش خصوصیات شیمیایی و رئولوژیک قیر اصلاح شده با پلیمر استایرن...

Journal: :international journal of nanoscience and nanotechnology 2010
j. jaafaripour maybody a. nemati e. salahi m. h. amin

stable homogeneous dispersions of carbon nanotubes (cnts) were prepared using ethanol as dispersing agent. then, using sol-gel method, dispersion in the hydroxyapatite matrix and its effects on the microstructure were investigated. the phase composition, chemical structure and morphological and size analyses were performed using xrd, ft-ir, sem, tem/saed/edx and raman spectroscopy. the influenc...

2002
Kevin Kuhn

The interaction between ammonia and Ru(0001) has been studied by means of Fourier-transform infrared reflection absorption spectroscopy (FT-IRAS). Chemisorption of NH 3 on Ru(0001) enhances the IR cross section of the umbrella mode of the molecule. For the first adsorption layer, changes in the IR intensity of the umbrella mode correlate with variations in the orientation of the molecules obser...

Journal: :IOP conference series 2023

Abstract This work is an assessment of contactless techniques for space hardware ground testing and characterization. It based on Fourier Transform Infrared (FT-IR) spectroscopy, namely a commercially available portable FT-IR instrument operating in reflection transmission measurements at considerable distance from the measured surfaces. The two methodologies are evaluated related to 1) molecul...

Journal: : 2022

A new ligand [4-chloro-N-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-ylcarb amothioyl) benzamide] (CAP) was synthesized by reaction of P-ChloroBenzoyl isothio cyanate with 4-aminoantipyrine,The characterized micro elemental analysis C.H.N.S.,FT-IR,UV-Vis and1H-13CNMR spectra, some transition metals complex this were prepared and FT-IR, UV-Vis conductivity measurements, magnetic suscep...

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