easily degradating and various isomeric forms of rapamycin (sirolimus) face the determination of this compound to many challenges. in this study, we developed and validated the isocratic reversed phase high performance liquid chromatographic (rp-hplc) method for rapamycin. separation was performed on a c8 column (mz, 15 × 4.6 mm, 5 µm particle size) using methanol:water (80:20 v/v) as the mobil...

a gradient reversed-phase high performance liquid chromatography (hplc) method was developed for the assay of cetrorelix acetate, a synthetic decapeptide with gonadotropin-releasing hormone (gnrh) antagonistic activity used in infertility treatment. the hplc method, which is used to determine cetrorelix in bulk and pharmaceutical dosage forms, was validated per ich guidelines. the chromatograph...

conclusions the clinical klebsiella strains isolated from lahore region, pakistan exhibited resistance to most commonly used antibiotics, which can be a serious threat to public health. the study reported some potential actinomycetes strains, which exhibit promising activity against multidrug resistant klebsiella strains. results the isolated klebsiella strains showed resistance against most of...

the present study was designed to develop a simple, validated liquid chromatographic method for the analysis of azithromycin in bulk and pharmaceutical dosage forms using ultraviolet detector. the best stationary phase was determined as c18 column, 5 µm, 250 mm × 4.6 mm. mobile phase was optimized to obtain a fast and selective separation of the drug. flow rate was 1.5 ml/min, wavelength was se...

an on-line uv-hplc / apci-ms (atmospheric pressure chemical ionization) tandem by a platinium c18 column with an isocratic solvent system after optimizing was applied to the separation and the identification of different carotenoids including astaxanthin, canthaxanthin, apocarotenoic ester, torularhodin and beta carotene. this method was used to identify particular carotenoids produced by newly...

BACKGROUND In-hospital hypovitaminosis C is highly prevalent but almost completely unrecognized. Medical awareness of this potentially important disorder is hindered by the inability of most hospital laboratories to determine plasma vitamin C concentrations. The availability of a simple, reliable method for analyzing plasma vitamin C could increase opportunities for routine plasma vitamin C ana...

In this study, quantitative and pattern recognition analyses were developed using HPLC/UV for the quality evaluation of Dipsaci Radix. For quantitative analysis, five major bioactive compounds were assessed. The separation conditions employed for HPLC/UV were optimized using ODS C18 column (250 × 4.6 mm, 5 μm) with a gradient of acetonitrile and water as the mobile phase at a flow rate of 1.0 m...

background: asphalt workers are exposed to dangerous agents in his workplace that might result in occupational diseases. benzo (a) pyrene as a human carcinogen, is emission from hot asphalt and asphalt workers are exposed with it. the aim of this study was, evaluation of respiratory exposure to benzo (a) pyrene among asphalt workers. method: in this study, 42 samples were collected from breathi...

in the present study, an efficient protocol has been developed for callus induction and production of ra in callus culture of satureja khuzistanica for the first time. in vitro callus induction was achieved from young shoot tip explants cultured on ms and b5 media supplemented with different concentrations of iba (0.1, 1.0, 2.0 and 5.0 mgl-1) solely or in combination with cytokinins bap and kin...

an environmentally benign rp-hplc approach for rapid analysis of glibenclamide in pure form, developed nanoemulsion and commercial tablets was developed and validated in present investigation. the green chromatographic identification was performed on lichrosphere 250 x 4.0 mm rp c8 column having a 5µm packing as a stationary phase using a combination of ethanol: methanol (50:50 % v/v) as a mobi...