Browsing School of Chemistry (Scholarly Articles) by Subject "Spectroscopy"
Now showing items 1-13 of 13
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Cell culture media analysis using rapid spectroscopic methods
(Elsevier, 2018-09-24)Cell culture media (CCM) used in industrial biotechnology are complex mixtures of molecules and elements that are inherently difficult to analyze comprehensively. CCM quality analysis is of utmost importance for efficient ... -
Classification of narcotics in solid mixtures using principal component analysis and Raman spectroscopy
(ASTM International, 2002-03-01)Eighty-five solid samples consisting of illegal narcotics diluted with several different materials were analyzed by near-infrared (785 nm excitation) Raman spectroscopy. Principal Component Analysis (PCA) was employed to ... -
Comparison of the fluorescence behavior of a biocrude oil and crude petroleum oils
(ACS Publications (American Chemical Society), 2006-02-15)The production and characterization of biocrude and petroleum like products from natural, renewable resources such as oil-bearing plant seeds is an interesting area of research at the moment. The present article discusses ... -
Identifications and quantitative measurements of narcotics in solid mixtures using near-IR Raman spectroscopy and multivariate analysis.
(ASTM International, 1999)Raman spectroscopy offers the potential for the identification of illegal narcotics in seconds by inelastic scattering of light from molecular vibrations. In this study cocaine, heroin, and MDMA were analyzed using near-IR ... -
Investigating tryptophan quenching of fluorescein fluorescence under protolytic equilibrium
(2009)Fluorescein is one of most used fluorescent labels for characterizing biological systems, such as proteins, and is used in fluorescence microscopy. However, if fluorescein is to be used for quantitative measurements involving ... -
The natural bile acid surfactant sodium taurocholate (NaTC) as a coformer in coamorphous systems: Enhanced physical stability and dissolution behavior of coamorphous drug-NaTc systems
(Elsevier, 2018-10-28)The amorphization of 18 different drugs on milling with one mole equivalent sodium taurocholate (NaTC) was investigated. In all cases the X-ray powder pattern showed an amorphous halo after milling at room temperature or ... -
Planar [Ni-7] discs as double-bowl, pseudo metallacalix[6]arene host cavities
(RSC, 2010-09-19)We report three heptanuclear[Ni-7] complexes with planar disc-like cores, akin to double-bowl metallocalix[6]arenes, which form molecular H-bonded host cavities. -
Quantitative analysis of cocaine in solid mixtures using Raman spectroscopy and chemometric methods
(Wiley, 2000)Near-infrared (785 mn) excitation was used to obtain Raman spectra from a series of 33 solid mixtures containing cocaine, caffeine and glucose (9.8-80.6% by weight cocaine), which were then analysed using chemometric ... -
Quantitative polymorph contaminant analysis in tablets using Raman and near infra-red spectroscopies
(2013)The detection and quantification of alternate polymorphs of active pharmaceutical ingredients (APIs), particularly at low concentrations is a key issue for the manufacture and analysis of solid-state formulations. Each ... -
A stainless steel multi-well plate (SS-MWP) for high-throughput Raman analysis of dilute solutions
(Wiley, 2010)The use of Raman spectroscopy for the qualitative and quantitative analysis of dilute aqueous solutions is of interest to the biopharmaceutical manufacturing sector. However, the inherent weakness of the Raman effect, ... -
Super stable fluorescein isothiocyanate isomer I monolayer for total internal reflection fluorescence microscopy
(American Chemical Society, 2018-08-27)Total internal reflection fluorescence microscopy (TIRFM) is an important method in surface science and for the analysis of surface-bound macromolecules. Here, we developed and explored the use of a novel fluorescein ... -
Unexpected effects of catalytic amounts of additives on crystallization from the gas phase: Depression of the sublimation temperature and polymorph control
(American Chemical Society, 2016-04-11)Sublimation of carbamazepine, piracetam, diflunisal, and p-minobenzoic acid is enhanced by the presence of additives. Temperature reductions and polymorph control have been observed. Sublimation of carbamazepine containing ... -
Using polarized Total Synchronous Fluorescence Spectroscopy (pTSFS) with PARAFAC analysis for characterizing intrinsic protein emission
(Elsevier, 2019-10-15)Using polarized Excitation Emission Matrix (pEEM) spectroscopy to measure the intrinsic emission of proteins offers a potentially useful methodology for a wide variety of potential applications. However, the presence of ...