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Showing 1 to 20 of 38 for “"Thin layer chromatography (TLC)"”.
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Analysis of Blue Fountain Pen Ink by UV-Vis Spectroscopy, ATR-FTIR Spectroscopy, and Thin Layer Chromatography Enhanced with RGB Spot Evaluation to Construct a Database for Comparison and Identification.
… information. The methods used and evaluated were thin-layer chromatography (TLC) enhanced with RGB spot evaluation, UV-Vis spectroscopy, and ATR-FTIR spectroscopy. All three methods were used to analyze 89 fountain pen ink samples. All three methods were able to discriminate between the majority …
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A spectroscopic study of paint
… included visual microscopy, wet chemical tests, thin layer chromatography (TLC), infrared spectroscopy (IR), Raman spectroscopy and pyrolysis-gas chromatography (Py-OC). Attenuated total reflectance (ATR) IR spectroscopy provided non-destructive discrimination between the majority of …
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Analysis of Hopanoids From Three Psychrophilic Marine Bacterial Strains
… hopanoids to their primary alcohols. Preparative thin layer chromatography (TLC) was used to fractionate the treated extract. The treated hopanoids, recovered as TLC bands, were derivatized by acetylation, followed by gas chromatography/mass spectrometry (GC/MS) analysis. Lipid extracts from A. …
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Quantitative HPTLC
Advances in thin layer chromatography (TLC), including smaller more uniform particles, use of a scanning spectrophotometer (densitometer), and sample application devices, led to the development of the High Performance Thin Layer Chromatography (HPTLC) technique. HPTLC allows quantitative as well as …
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A Survey on the Microscopical and Chemical Analysis of Synthetic Wig Fibers
… wig fibers, especially as a collective group within a single wig, can vary greatly from those synthetic fibers collected from garments and household items. A number of samples were collected from 50 brown, blonde and black wigs made of modacrylic, polyvinyl chloride, polypropylene, and nylon …
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Molecular Biology of Desiccation Tolerance in the Cyanobacterium Nostoc commune
… Sucrose synthesis was confirmed through thin layer chromatography (TLC) analysis of cell extracts from transformants. Long-term stability of DNA in desiccated Nostoc samples was demonstrated by the ability to amplify selected gene loci from samples stored dry for decades. Successful …
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New bio-analytical separations utilizing chiral mobile phase additives in thin layer chromatography and chiral stationary phases in high performance liquid chromatography
… organic intermediates in high performance liquid chromatography (HPLC) and thin layer chromatography (TLC) were achieved. Two methods were employed for the direct liquid chromatographic resolution of chiral analytes: chiral stationary phases (CSPs) and chiral mobile phase additives (CMAs). Native …
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Ethnobotanical and ethnopharmacological documentation of antimalarial plants used by the Jakun community in Kg Peta, Endau-Rompin, Johor, Malaysia
… flavonoids, terpenoids and anthraquinones using thin-layer chromatography (TLC). Results revealed the presence of at least one of the phytochemical class in each extracts. Extracts were subjected to antiplasmodial activity through histidine-rich protein II (HRP2) assay against K1 strain of P. …
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Development of Mono-de-N-acetylated β-(1→6)-N-acetyl-D-glucosamine Substrates for Characterization of PgaB Hydrolase Activity
… through the development of a fluorescence-based thin-layer chromatography (TLC) assay. Mass spectrometry experiments and nuclear magnetic resonance (NMR) spectroscopy analysis provided further insights into the requirements for substrate recognition and mechanism of hydrolysis. These results are …
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Baltymų amiloidinės agregacijos slopinimui skirtų 5-pakeistų-7H-imidazo[2,1-b][1,3]tiazinų sintezė /
… methodologies, reactions were evaluated using thin-layer chromatography (TLC) method. Structures of new compounds were elucidated by 1H and 13C nuclear magnetic resonance (NMR) spectroscopy, IR spectroscopy, melting points. Results and conclusions. Based on compounds of various structures …
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Biological control of seedling blight of winter wheat caused by Fusarium culmorum and microdochium nivale
… but had no effect on mycelial growth. Thin layer chromatography (TLC) of a G. roseum culture extract showed nine UV-visible bands of which four displayed antibiotic activity towards F. culmorum. A G. catenulatum culture filtrate produced six UV-visible bands of which two significantly …
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An investigation of some factors affecting transdermal permeation.
… as penetrants. Thermogravimetric Analysis, Thin-Layer Chromatography (TLC) and Infrared Spectroscopy were used to provide additional information. DTA of s.c. revealed four endothermic transitions. Those at 42°, 71° and 80°C were attributed to melting of crystalline lipid, and at 110°C to …
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Characterization and differentiation of a soluble lipopolysaccharide type antigen from Treponema hyodysenteriae.
… hydrophilic components of acid hydrolyzed LPSLS. Thin layer chromatography (TLC) of the hydrophobic portion demonstrated the presence of a spot with an Rf of 0.18 that correlates with nonpathogenicity. Gas chromatography (GC) analysis of the carbohydrate content of the LPSLS revealed the presence …
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Effects of polyphosphates on frozen chickens.
… hydrolysis of polyphosphates was studied using thin layer chromatography(TLC) and phosphorus-31 Fourier transform nuclear magnetic resonance ([31] P-FTNMR) . The reasons for choosing thesetechniques, and the results of preliminary tests are given.Polyphosphate treatment was found to result in …
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Phytochemical and Antimicrobial Studies on Selected Medicinal Plants from The Iraqi Flora: Citrus grandis, Citrus sinensis and Ruta chalepensis
… active extracts/fractions using a combination of thin layer chromatography (TLC), solid-phase extraction and reversed-phase high-performance liquid chromatography (HPLC). 1D and 2D nuclear magnetic resonance (NMR) and mass spectrometric techniques were employed to identify and confirm the …
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An investigation of the effect of surfactants on transdermal permeation.
… transform infrared spectroscopy (FTIR); and thin layer chromatography (TLC); with the physical methods being used to elucidate structural changes in the stratum corneum. All of the surfactants, except for the polysorbates, caused highly significant increases in the permeability of the stratum …
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Concentration dependency, mode of action and characterization of compounds involved in alfalfa autotoxicity
… in length of root hairs compared to the control. Thin layer chromatography (TLC) of the acid-hydrolysed, ethyl-ether-extracted alfalfa shoot aqueous extract followed by the gas-liquid chromatography of the TLC fractions indicated that some of the compounds present in the sample had characteristics …
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Purification and Characterization of the Prostate Cancer-Associated Antigen: 7E11-C5
… LNCaP xenograft tissue extract by immunoaffinity chromatography with an estimated antigen recovery of 64%. High pressure liquid chromatography (HPLC) molecular exclusion column was used to further purify the antigen and results showed that the molecular weight of the antigen, under native …
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Antibiotic and biocide resistance in Salmonella enterica and Escherichia coli 0157
… investigated as possible resistance candidates. Thin layer chromatography (TLC) and Gas chromatography (GC) were carried out to examine fatty acid and lipid changes in E. coli 0157 isolates with reduced susceptibility to TLN. Cross-resistance was studied by the Stoke's method and standard …
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Rapid Screening Methods to Identify Substandard and Falsified Medicines
… approaches, for example, visual appearance, thin layer chromatography (TLC) to those that are technically refined, such as, Raman spectroscopy, Near Infrared (NIR) spectroscopy and Mass Spectrometry (MS). In order to counteract the increasing complexity of anti-counterfeit measures, …
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