As one of the main competencies, professionalism is to be taught and evaluated during the residency period. The aim of this research is to investigate the professionalism perception among medical residents of Tabriz University of Medical Sciences. This cross-sectional study was conducted in 2017 using Persian Professionalism Questionnaire American Board of Internal Medicine (American Board of Internal Medicine). Probability proportional to size sampling was used to recruit the participants (n = 250). Data analysis was done using SPSS24 through descriptive and analytical statistics. The mean age of residents was 33.28 (SD = 5.56). About 46% of residents were not familiar with professionalism. Mean of perceived professionalism score by the residents was to be 6.85 (of 10) ± 1.52. Honor/Integrity dimension with a score of 7.53 ± 2.1 had the highest mean, while professional excellence with a score of 6.2 ± 1.43 had the lowest mean. No statistically significant relationship was observed between residents’ demographic characteristics and perceived professionalism. Medical residents’ professionalism perception was not at an acceptable level. It is necessary to spread the concept of professionalism in the form of formal and informal training programs to promote residents’ professional behaviors. Moreover, it was experienced that peer to peer observation could be used to assess professionalism in the working environment.

ObjectiveSilibinin is an antioxidant agent and is shown to have anticancer effects in different cancers including lung, breast, colorectal, liver, prostate, and kidney. There are challenges in the clinical use of silibinin. The main limitation is low solubility, poor oral absorption, and extensive hepatic metabolism. We aim to develop a High-Performance Liquid Chromatography (HPLC) sensitive method for quantification of silibinin in aqueous samples to quantify its concentration in new formulations. A reverse-phase high-performance liquid chromatography (RP-HPLC) composed of C18 column as stationary phase and the mixture of methanol (90%) and water (10%) as mobile phase. The developed method was validated based on the established guidelines.ResultsThe retention time for silibinin was seen in 2.97 min after injection. The calibration curve was drawn and the established method demonstrated a linear ranged from 10 to 100 µg/ml, with a correlation coefficient of 0.996. The sensitivity of the developed method was 10 µg/ml. The accuracy calculated in the range of 88–105.9% and the precision (as relative standard deviation) was between 2.7 and 10.9%. These results demonstrate that the developed method can be a fast and accurate method for quantification of silibinin in aqueous samples.

Objective : Silibinin is an antioxidant agent and is shown to have anticancer effects in different cancers including lung, breast, colorectal, liver, prostate, and kidney. There are challenges in the clinical use of Silibinin. The main limitation is low solubility, poor oral absorption, and extensive hepatic metabolism. We developed a High-Performance Liquid Chromatography sensitive method for quantification of Silibinin in in-vitro samples to quantify in different formulations. We applied HPLC set, C18 column as stationary phase and the mixture of methanol (90%) and water (10%) as mobile phase. Utilized solutions were daily prepared through serial dilution of stock solution to make specific concentrations ranged between 10 μg/ml to 100 μg/ml. The developed method was validated by credible guidelines.Results : The calibration curve was drawn according to the height peaks of different concentrations and the established method demonstrated a linear ranged from 10 to 100 µg/ml, with a correlation coefficient of 0.996 for in-vitro samples. The retention time was 2.97 min, and the accuracy and precision (inter-day and intra-day) of the developed method was in the range of 88-105.9%. These results demonstrate that the developed method can be a fast and accurate method for quantification of Silibinin in in-vitro samples.

Objective : Silibinin is an antioxidant agent and is shown to have anticancer effects in different cancers including lung, breast, colorectal, liver, prostate, and kidney. There are challenges in the clinical use of silibinin. The main limitation is low solubility, poor oral absorption, and extensive hepatic metabolism. We aim to develop a High-Performance Liquid Chromatography (HPLC) sensitive method for quantification of silibinin in aqueous samples to quantify its concentration in new formulations. A reverse-phase high-performance liquid chromatography (RP-HPLC) composed of C18 column as stationary phase and the mixture of methanol (90%) and water (10%) as mobile phase. The developed method was validated based on the established guidelines. Results : The retention time for silibinin was seen in 2.97 minute after injection. The calibration curve was drawn and the established method demonstrated a linear ranged from 10 to 100 µg/ml, with a correlation coefficient of 0.996. The sensitivity of the developed method was 10 µg/ml. The accuracy calculated in the range of 88-105.9% and the precision (as relative standard deviation) was between 2.7-10.9%. These results demonstrate that the developed method can be a fast and accurate method for quantification of silibinin in aqueous samples.

Objective : Silibinin is an antioxidant agent and is shown to have anticancer effects in different cancers including lung, breast, colorectal, liver, prostate, and kidney. There are challenges in the clinical use of silibinin. The main limitation is low solubility, poor oral absorption, and extensive hepatic metabolism. We aim to develop a High-Performance Liquid Chromatography (HPLC) sensitive method for quantification of silibinin in aqueous samples to quantify its concentration in new formulations. A reverse-phase high-performance liquid chromatography (RP-HPLC) composed of C18 column as stationary phase and the mixture of methanol (90%) and water (10%) as mobile phase. The developed method was validated based on the established guidelines. Results : The retention time for silibinin was seen in 2.97 minute after injection. The calibration curve was drawn and the established method demonstrated a linear ranged from 10 to 100 µg/ml, with a correlation coefficient of 0.996. The sensitivity of the developed method was 10 µg/ml. The accuracy calculated in the range of 88-105.9% and the precision (as relative standard deviation) was between 2.7-10.9%. These results demonstrate that the developed method can be a fast and accurate method for quantification of silibinin in aqueous samples.