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Showing 1 to 20 of 96 for “"Hplc analysis"”.
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HPLC analysis to assess efficacy of cisplatin, nedaplatin, and oxaliplatin
… work, High Performance Liquid Chromatography (HPLC) analysis was performed to assess the binding of cisplatin, nedaplatin, and oxaliplatin to the dinucleotide dGpdG. By examining the concentration ratios and incubation periods at 37 °C, we measured the amount of platinum drug reacted with DNA …
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HPLC analysis of Romet-30 in chinook salmon (Oncorhynchus tshawytscha): wash-out time, tissue distribution in muscle and liver tissues, and metabolism of sulfadimethoxine
… tissue would be more or less consistent. An HPLC assay was developed for determination of Romet-30®residue levels in Chinook salmon muscle and liver tissues. By using ion-pairing reagent TBAH and granular sodium sulfate anhydrous during extraction, the extraction recoveries averaged 66%, 78% …
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The investigation of indigenous South African medicinal plants for activity against Mycobacterium tuberculosis
… extracts were prepared and characterized using HPLC analysis. The crude rhizome extracts of Agapanthus praecox, leaf extracts of Olea europaea subsp.
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Production of diospyrin by Euclea natalensis seedlings and in vitro cultures
… activity against Mycobacterium aurum, and HPLC analysis of the extracts demonstrated a corresponding accumulation of diospyrin, mostly in the stem (0.23%, DW) and roots (0.17%, DW) of the seedlings.
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Nitrophenyl boronic acids as derivatizing agents in chromatography
… nitrophenyl boronates as derivatives for GC and HPLC analysis has been studied. Samples of ortho, meta and para nitrophenyl boronic acids were prepared and purified, the purity of these products was examined by GC. The derivatization performance of these acids was studied employing a number of …
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Determination of platinum, palladium and rhodium, in aqueous media by means of reversed phase-high performance liquid chromatography (RP-HPLC) after complexation with N,N-dialkyl-N'-acylthioureas
… Phase-High Performance Liquid Chromatography (RP-HPLC) and a UV detector. A simple method of complexation of platinum(II) and palladium(II) in acidic, aqueous samples was developed. This method involves the mixing of excess ligand (HL") in acetonitrile with aqueous solutions containing traces of …
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Transport and utilization of arginine and arginine-containing peptides by rat alveolar macrophages
… for nitric oxide (NO) production.;Method. A HPLC assay was developed for quantitative measurement of Arg and ACPs in rat plasma and bronchoalveolar lavage (BAL) fluid. The uptake of small peptides by rat AM was evaluated using fluorescein isothiocynate (FITC)-labeled (*) peptides (Arg-Lys*, …
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Capillary Zone Electrophoresis Analysis of Isocyanates in Spray-Painting Operations
… Several methods were used for the sampling and analysis of airborne 1,6- hexamethylene diisocyanate (HDI) monomer and polyisocyanate during Spray-painting operations. NIOSH Method 5521, OSHA Method 42, NIOSH Method 5522 and Capillary Zone Electrophoresis (CZE) methods were compared. The results …
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Extraction and Purification of Gamma-Tocotrienol from Rice Bran Oil Deodorizer Distillate
… rice bran oil deodorizer distillate (RBODD). NP-HPLC analysis of tocol standards was optimized by testing ten mobile phases. Tocol extraction was optimized by testing three concentration solvents (acetonitrile, methanol, ethanol) using various solvent:RBODD ratios (5:1, 10:1, 15:1, 20:1) at two …
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The analysis of marine algae photosynthetic pigments by high performance liquid chromatography
A method of analysis of the photosynthetic pigments of in vitro algal cultures, using reverse-phase high performance liquid chromatography (HPLC) is described. This technique was extended to analysis of photosynthetic pigments in samples from the SIBEX-I Expedition; a preconcentration technique was …
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Evaluation of SPEC®•Microcolumns for the extraction of ranitidine from urine
… for high performance liquid chromatography (HPLC) analysis. SPEC®⋅Microcolumns are rigid disc structures with glass fiber impregnated with silica gel. These microcolumns look like packed-bed SPE cartridges but have the advantages of low void volumes and low bed mass that give clean extracts …
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The targeting of corticosteroids to inflamed tissues
… release from microspheres was determined by HPLC analysis. A reversed-phase, ion-pairing HPLC method was developed to simultaneously measure both HC and H-21-P. The highest level of corticosteroid loading was achieved using the incorporation of H-21-P with enzymatic conversion to HC method. …
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EFFECT OF WATERCRESS EXTRACT AND KAEMPFEROL AGAINST OXIDATIVESTRESS
… structural and conformational changes in HSA. HPLC analysis confirmed the presence of derivatives of kaempferol in the watercress extract, supporting the phytochemical basis of its antioxidant activity. The current study found that the synergy of both watercress and kaempferol can function as …
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Biochemical and Structural Studies of Pseudouridine 55 Synthase
… is also found in the active site. Furthermore, HPLC analysis indicates that 5FhPsi is also formed when 5FU RNA was incubated with either E. coli Y76F or Y76L but not with Y76A. The combined information from structural, biochemical and mutational studies allows us to propose the likely role of …
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Determination of ground-water tracer 2,6-difluorobenzoic acid by Gc/Ms
… used. Silylation of 2,6-DFBA combined with GC/MS analysis has proven to be the best method in this study, due to the low detection limits (part per trillion) achieved, and the stability of the 2,6-DFBA silyl derivative. A GC/MS instrument calibration curve was established, a C-well water sample …
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Separation of enantiomers of Baclofen
… Vere analysed by X-ray crystallography. HPLC analysis of the lactam retrieved from the former co-crystals indicated only partial separation of its (+) and (-) enantiomers. X-ray crystallographic, thermal, and polarimetric analyses were perfom1ed on the ( + )- and (-)-salts of the latter …
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Effects of Natural Antioxidants on Lipid Oxidation of Menhaden Oil
… 0.37mg/g, and 0.14mg/g, respectively, using HPLC analysis. Teng Cha extract effectively delayed oxidation of menhaden oil (MO) when stored at 40°C for eight days by measuring primary oxidation products and secondary oxidation products. The combinations of Teng Cha extract and rosemary extract …
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Synthesis of Novel Agrochemicals as Potential Plant Immunization Agents.
… the in-vitro activity with SABP2 of BTH by HPLC analysis.</p>
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Preparation and Characterization Of Oil-in-water Nano-emulsions Of Trifluoperazine For Parenteral Drug Delivery
… potency using high performance chromatography (HPLC).</p><p> Materials and Methods: Emulsions containing soybean oil, water, trifluoperazine hcl as an amphiphilic drug, phospholipon 90 and Tween 80 as surfactant blend were prepared using the Thin-layer hydration method. Z-average, polydispersity …
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Optimisation of chemoenzymatic processes in asymmetric synthesis
… and X-ray diffraction linked with chiral HPLC analysis. The fourth chapter was focused on the development of a biocatalytic protocol for the asymmetric Henry reaction. Efficient kinetic resolution in hydrolase-mediated transesterification of cis- and trans- β-nitrocyclohexanol derivatives …
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