Showing 4 results for Tavakkol
Mohammad Reza Tavakkol, Reza Tajik, Marzyeh Tavakkol,
Volume 20, Issue 5 (8-2017)
Abstract
Abstract
Background: Occupational hygiene is the art and science of the control of the occupational hazards and risk assessment is its most important duty. American Industrial Hygiene Association offered an accurate, sensitive and specific risk assessment method appropriate to the principles of the occupational health. In the present study, Arak Occupational hygienists idea about the strengths, weaknesses, administrative problems and improvement tools was asked.
Materials and Methods: This study is descriptive and analytical research and census in Arak Occupational hygienists(N=53). Data recording forms were designed to improve the appreciation and implementation of the method. An Excel® spreadsheet file was prepared to facilitate the calculations and keeping the recorded data. Experts’ attitude in this regard was evaluated using a questionnaire. Descriptive information was assessed by SPSS software and the relationship between variables was assessed by the Pearson coefficient.
Results Totally, 4% of participants in university were familiar with the method of risk assessment. In this study, 88% of the participants stated that the early identification forms were effective in streamlining the procedure. Furthermore, 84% stated that early identification forms were effective in learning the method. A fundamental issue regarding this method is its simplicity and ability to overall conception; that showed a uniform distribution from appropriate to inappropriate. The relationship between Excel file streamlining and simplicity of its concepts was found to be 0.743.
Conclusion: Application of tools such as identical forms and spreadsheets can help in simplifying and conception of this method and reduce some of the administrative problems.
Haleh Sadat Tavakkol Afshari, Masoud Homayouni Tabrizi, Touran Ardalan,
Volume 22, Issue 4 (9-2019)
Abstract
Background and Aim Among nano-pharmaceutical materials, nanoemulsions are an important tool in the field of nanotechnology. They have been designed for clinical and therapeutic applications. Since the therapeutic efficacy of cancer is measured by the ability of the drug to reduce and eliminate tumors without damaging healthy tissues, nanoemulsions can be useful as a targeted drug carrier. Therefore, we are going to study the antioxidant and anticancer effects of nanoemulsions prepared using dill essential oil.
Methods and Materials Evaluate the antioxidant properties, we used DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS (2,2'-azino-bis[3-ethylbenzothiazoline-6-sulphonic acid]) tests. We also applied MTT assay for the evaluation of induced cytotoxicity in liver hepatocellular carcinoma cells and normal human umbilical vein endothelial cells.
Ethical Considerations The Research Ethics Committee of Islamic Azad University (Mashhad Branch) approved this study (Code: IR.IAU.MSHD.REC.1398.027).
Results Nanoemulsions prepared using dill essential oil has a good potential for inhibiting DPPH (IC50=500 μg/mL) and ABTS (IC50=420 μg/mL) radicals. Nanoemulsions also caused a little toxicity to both cell lines. Nanoemulsions reduced cell viability in a dose-dependent manner and the cytotoxicity induced to cancer cells was higher than normal cells.
Conclusion The present study indicates that nanoemulsions prepared by dill essential oil will have the potential to become a therapeutic strategy for diseases caused by oxidative stress.
Haleh Sadat Tavakkol Afshari, Masoud Homayouni Tabrizi, Touran Ardalan,
Volume 24, Issue 1 (April & May 2021)
Abstract
Background and Aim: Angiogenesis is the process of forming new blood vessels from the old ones; it plays an important role in physiological conditions, such as growth, wound healing, and reproduction. This process also plays a vital role in pathological phenomena and the occurrence of various diseases, especially tumor growth and metastasis. The present study evaluated the anti-angiogenic effects of nanoemulsion synthesized from Anethum graveolens essential oil using the CAM method.
Methods & Materials: To investigate the anti-angiogenic effects on the second day of incubation, a window was opened on the eggs. Subsequently, on the eighth day, a gelatin sponge with nanoemulsion with different doses (12.5, 25, and 50 μg/mL) was inserted on the chorioallantoic membrane. On the 12th day of incubation, a research stereomicroscope was used to evaluate the rate of angiogenesis and imaging of the treated area. Vascular factors were examined by Image J software.
Ethical Considerations: This study was approved by the Research Ethics Committee of Mashhad Branch, Islamic Azad University (Code: IR.IAU.MSHD.REC.1398.027).
Results: The obtained results concerning the effect of nanoemulsion on the rate of angiogenesis in the CAM test indicated a decrease in the length and number of vessels of the chorioallantoic membrane in the treated samples, compared to the controls. Moreover, there was a reduction in the height and weight of treated fetuses, compared to the untreated fetuses (P<0.05).
Conclusion: The anti-angiogenic activity of nanoemulsion synthesized from Anethum graveolens essential oil indicated the possible use of this substance for diseases, like cancer, in which the formation of blood vessels is inhibited. Therefore, Anethum graveolens nanoemulsion can be suggested as an agent for further cancer studies.
Mohammad Douzandeh Nargesi, Zohreh Teymori, Mehnoosh Tavakkolifard,
Volume 27, Issue 3 (7-2024)
Abstract
Introduction: The stress caused by COVID-19 had affected many people in society, especially individuals at risk. The present study was carried out to investigate, firstly, whether COVID-19-related stress plays a mediating role in the relationship between rumination and aggression in drug-dependent people undergoing treatment. Secondly, the study was conducted to know whether rumination has an indirect effect on the aggression of substance-dependent people under treatment through the mediation of COVID-19-related stress.
Methods: In this correlational analytical study, 136 patients undergoing maintenance treatment with methadone who were willing to enter the study were investigated by the available sampling method in two addiction treatment centers in the 1st and 2nd districts. The data collection tools in the present study included the Corona Disease Anxiety Questionnaire, Rumination Questionnaire, and Bass and Perry Aggression Questionnaire. After collecting the data, the anxiety score of each participant was measured from 0 to 54, the rumination score from 0 to 88, and the aggression score from 29 to 145. Then, the data was analyzed using Lisrel statistical software.
Results: Findings showed that the direct effect of rumination on aggression is 0.23, which is significant at the P < 0.01 level. Therefore, rumination has a positive and direct effect on aggression. Also, COVID-19-related stress plays a mediating role in the relationship between rumination and aggression in drug addicts under treatment. In addition, the indirect effect of rumination on aggression is 0.25, which is significant. Thus, rumination has an indirect effect on aggression through the mediation of COVID-19-related stress.
Conclusions: According to the high prevalence of psycho-social problems such as depression, anxiety, fear, addiction, job burnout, suicidal thoughts, violence, domestic and post-traumatic stress during the COVID-19 pandemic, in the post-corona era, we have witnessed a high amount of mental and social injuries in the world. For this reason, governments must screen psychologically vulnerable groups in advance.
