Showing 4 results for Fotovat
Volume 6, Issue 1 (7-2016)
Abstract
Denison’s Organizational Culture Model (DOCS) was used widely by academics and practitioners today. However we included the papers has published in Iranian journals that was published in several Iranian universities in a systematic review and results of a meta-analysis suggested that all cultures’ traits; involvement, Consistency, adaptability, and mission have similar measures. We found some methodological errors in the Denison and Mishra (1995) paper. First of all the correlation test wasn’t suite statistical test to compare the four traits of organizational cultures. And finally the five point Likert measurement in not good enough to measure the traits of organizational cultures. We should be concerned about the relation between organizational effectiveness and four traits of organizational cultures based on these methodological errors.
P. Keshavarz, M. J. Malakouti, N. Karimian, A. Fotovat,
Volume 8, Issue 2 (Number 2 - 2006)
Abstract
Use of saline water for irrigation has shown considerable promise. However, its effect on the solubility and bioavailability of native soil nutrients is not well understood. This study was conducted to evaluate the effects of salinity on the behavior of zinc(Zn) in calcareous soils. The soil samples with different physiochemical properties were collected from four locations in Khorasan province (Iran). The factorial experiment was carried out as a completely randomized design on soils with four levels of water salinity (0, 37.5, 75 and 150 mole m-3 prepared with the same equivalents of NaCl and CaCl2) and four reaction times (0, 10, 20, and 30 days) with three replications. DTPA-extractable Zn was measured in the incubated soil samples after the given reaction times. Different chemical forms of Zn were characterized after 30 days using the sequential extraction procedure. DTPA-extractable Zn increased by 1 to 6.3% with the increasing levels of salinity, and decreased from 8.7 to 3.9% by increasing the reaction time significantly (P<0.05). The determination of Zn compounds by the sequential extraction procedure revealed significantly different forms of Zn with the average amounts in the following order: (KNO3+H2O)-Zn(soluble+exchangeable forms) < NaOH-Zn(organic form) < EDTA-Zn (carbonate form) << HNO3 -Zn (residual). Salinity affected various forms of Zn i.e. soluble + exchangeable, organic and residual. Increasing soil salinity level increased the KNO3+H2O extractable Zn by 20 to 80% and the NaOH extractable form by 8.6 to 43%. DTPA-Zn was significantly correlated with the NaOH extractable form (r=0.98 P<0.05) and with the (KNO3+H2O)-Zn, (r=0.94 P<0.05). It was concluded that increasing salinity redistributed HNO3-extracted Zn (residual) to the KNO3+H2O extractable (soluble + exchangeable) and NaOH extractable (organic) forms of Zn.
Volume 11, Issue 1 (Winter 2020)
Abstract
Aims: Breast cancer is the most common malignancy in women throughout the world. Among the various methods for preventing and treating cancer, plant natural compounds have more benefits than chemical drugs and have less side effects. Recently, many studies have been carried out on the antioxidant, anticancer, antiproliferation, and antiinflammatory properties of plant lignans, indicating the importance of these compounds in the prevention and treatment of various diseases. In the present study, the cytotoxic effects and inducing apoptosis of pinoresinol and lariciresinol lignans were investigated on SKBr3 breast cancer cell line.
Materials & Methods: SKBr3 cells were treated with different concentrations of both pinoresinol and lariciresinol, separately for 72 hours. Then, cell viability and cells morphological changes were determined using MTT assay and inverted light microscope, respectively. Also, apoptosis induction was analyzed by flow cytometry using an Annexin V-FITC apoptosis detection kit.
Findings: Both pinoresinol and lariciresinol treatments induced morphological changes, decreased cell growth, survival, proliferation and a significant increase in apoptosis induction in SKBr3 cell line compared to control cells in a concentration-dependent manner.
Conclusion: Inducing apoptosis and preventing the growth and proliferation of cancer cells are important mechanisms in the treatment of cancer. Pinoresinol and lariciresinol can be used to reduce cell proliferation and increase apoptosis induction in prevention and treatment of breast cancer.
A. Bazoobandi, A. Fotovat, A. Halajnia, A. Philippe,
Volume 24, Issue 6 (11-2022)
Abstract
The widespread use of silver Nanoparticles (AgNPs) in various industries has raised concerns about the fate of these materials. Therefore, the present study aimed to assess the effects of coating agents of Ag particles in soil and how they interact with plants as the first step in the human food chain. Radish (Raphanus sativus) was exposed to silver Nitrate (AgNO3) as well as AgNPs with different coatings: Citrate (AgNPs-Cit), Polyethyleneimine (AgNPs-PEI), and Polyvinylpyrrolidone (AgNPs-PVP) at different concentrations. The effect of concentration (5, 25, 125 mg kg-1 soil) and the type of coatings on the dry weight of radish were compared with the control. The results revealed that the type of treatments affected dry weight of radish and, among all treatments, AgNO3 had the highest weight loss, in which shoot dry weight decreased by 51%. Total silver measurement in radish root, tuber, and shoot indicated that the accumulation of AgNPs was influenced by the type and concentration of the coating. The AgNPs with positive charge coating (PEI) had a higher transfer ratio than other treatments. The findings indicated that radish had the ability to store silver in its root, tuber, and shoots in large amounts, thus having the potential to act as a source of silver contamination for humans.
