نتایج جستجو برای: ft ir measurements

تعداد نتایج: 440498  

2007
D. Lefier

The classification of bacteria is generally based on the morphology and biochemical reactions of the bacteria. However, these measurements are time consuming, and require training and expertise. Infrared (IR) spectroscopic measurements of bacteria followed by a formal chemometrics analysis could offer advantages of speed and consistency. Such an analysis was first tried in the late 1950s, with ...

2014
Haihong Ma Tiejun Shi Qiusheng Song Stephen C. Bondy

Hybrid sols of poly (vinyl alcohol) (PVA)/Silicon oxide-titanium oxide (SiO2-TiO2) were prepared with tetraethoxylsilane and tetrabutyl titanate as precursor using Sol-Gel method. PVA/SiO2-TiO2 hybrid fibers were prepared by drawing from the hybrid sols using dip-coating method and aging treatment. The spinnability of hybrid sols was investigated. Spinnable time (t) and spinnable length (l) of ...

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...

Journal: :Journal of microbiological methods 2006
Wei E Huang David Hopper Royston Goodacre Manfred Beckmann Andrew Singer John Draper

Fourier transform-infrared (FT-IR) spectroscopy has become an important tool for rapid analysis of complex biological samples. The infrared absorbance spectrum could be regarded as a "fingerprint" which is characteristic of biochemical substances. In this study, Pseudomonas putida NCIMB 9869 was grown with either 3,5-xylenol or m-cresol as the sole carbon source, each inducing different metabol...

Journal: :Food microbiology 2012
R Davis G Paoli L J Mauer

The importance of tracking outbreaks of foodborne illness and the emergence of new virulent subtypes of foodborne pathogens have created the need for rapid and reliable sub-typing methods for Escherichia coli O157:H7. Fourier transform infrared (FT-IR) spectroscopy coupled with multivariate statistical analyses was used for sub-typing 30 strains of E. coli O157:H7 that had previously been typed...

Journal: :journal of nanostructures 2015
s. saeednia p. iranmanesh m. hatefi ardakani s. sinaei

cu2o nanoparticles were synthesized by thermal treatment in liquid paraffin without any inert gas protection using nano structures of schiff base copper (ii) complex (1) as precursor. liquid paraffin was used as solvent and reductant. span 80 was applied to control the morphology of cuprous oxide nanoparticles. the nano structure of the complex was characterized by x-ray diffraction measurement...

Journal: :Crystals 2023

The multi-component solid form of febuxostat (FEB) with p-toluenesulfonic acid was synthesized by solvent-drop grinding and cooling-evaporative crystallization characterized powder X-ray diffraction (XRPD), thermogravimetry (TGA), differential scanning calorimetry (DSC), infrared spectroscopy (FT-IR). stable after exposure at elevated temperature relative humidity dissolution measurements revea...

Journal: :Applied spectroscopy 2013
Thomas van Dijk David Mayerich P Scott Carney Rohit Bhargava

An infrared spectrum recorded from a microscopic sample depends on spectral properties of the constituent material as well as on morphology. Many samples or domains within heterogeneous materials can be idealized as spheres, in which both scattering and absorption from the three-dimensional shape affect the recorded spectrum. Spectra recorded from such objects may be altered to such an extent t...

2005
Hongjuan Zhao Rachel L. Parry David I. Ellis Gareth W. Griffith Royston Goodacre

Fifteen putative Streptomyces spp. isolated from soil were selected to be analysed using Fourier transform infrared (FT-IR) spectroscopy and 16S rRNA gene sequencing. Four colour groupings (groups 1–4) were obtained and described according to the colour of their substrate mycelia, aerial mycelia, spore mass and pigmentation. The dendrogram constructed using unsupervised cluster analysis of the ...

Journal: :Applied and environmental microbiology 2010
Ornella Preisner Raquel Guiomar Jorge Machado José Cardoso Menezes João Almeida Lopes

Fourier transform infrared (FT-IR) spectroscopy and chemometric techniques were used to discriminate five closely related Salmonella enterica serotype Enteritidis phage types, phage type 1 (PT1), PT1b, PT4b, PT6, and PT6a. Intact cells and outer membrane protein (OMP) extracts from bacterial cell membranes were subjected to FT-IR analysis in transmittance mode. Spectra were collected over a wav...

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