در هنگام جستجو کلمه در قسمت عنوان میتوانید کلمات مورد جستجو را با کاراکتر (-) جدا کنید.
کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: International Journal of Advanced Biological and Biomedical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: 3-Dimensional Modeling,Interstitium Physical Properties,structural characteristics
- چکیده:
- چکیده انگلیسی: Background: Many theories and mathematical simulations have been proposed concerning urine concentrating mechanism (UCM). Due to significant effect of the tubule and vessel architecture in concentrating mechanism, the numerical analysis of UCM through a 3-Dimensional structure might be the answer to find a better consistency between the experimental and theoretical results.
Methods: In this paper we have investigated the effects of structural characteristics of the tubules and vessels on the urine concentrating mechanism in the outer medulla (OM) by developing a simple three-dimensional mathematical model. This model is a framework to attain a converged numerical solution for the momentum and species transport equations along with their stiff and coupled boundary conditions based on standard expressions for trans-tubular solutes and water transports on tubule’s membrane.
Results: The model structure and the number of the involved tubules have been assumed to be as simple as possible. The effects of slip boundary condition on membrane, Darcy permeability and solute’s diffusivity of the intermediate media on UCM have been studied. It has been shown that this approach can simply simulate preferential interactions and tubule’s confinement by radial diffusion coefficients.
Conclusions: All in all, the feasibility of the idea of completely 3-D modeling by employing the concept of diffusion coefficient and Darcy permeability has been explored and validated.- انتشار مقاله: 31-03-1399
- نویسندگان: Maryam Saadatmand,Mohammad Said Saidi,Salman Sohrabi,Mohammad Hossein Banazadeh,Saeed Sadeghi Lafmejani,Hamid Hamed,Bahar Firoozabadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Addiction and Health
- نوع مقاله: Journal Article
- کلمات کلیدی: Religious beliefs,Psychological stress,Medical students,nicotine dependence
- چکیده:
- چکیده انگلیسی: Background: Psychological stress is associated with unhealthy lifestyles, including smoking. Moreover, religious
beliefs can play a significant role in relieving mental disorders such as anxiety and stress. Due to the frequent
exposure of medical students to stressful situations, this study was conducted with the aim to investigate the
relationship of internal and external religious orientation with perceived stress and nicotine dependence.
Methods: This correlational study was carried out on medical students of Kerman University of Medical
Sciences, Kerman, Iran, in 2015. The sample size was determined to be 224 individuals using the Morgan
table. The participants were selected using stratified random sampling. The data collection tools consisted of
a demographic information form, the Religious Orientation Scale (ROS) (Allport and Ross), the Perceived
Stress Scale (PSS-14), and the Fagerstrom Test for Nicotine Dependence (FTND). Data were analyzed using
multiple regression analysis, analysis of variance (ANOVA), Pearson correlation coefficient, and t-test in
SPSS software.
Findings: The findings of the study showed that internal religious orientation had a significant negative
relationship with perceived stress and nicotine dependence; however, no significant relationship was
observed between external religious orientation and these variables.
Conclusion: Based on the results of the study, it can be concluded that the religious beliefs of individuals have
a preventive role in perceived stress and nicotine dependence.
- انتشار مقاله: 10-04-1398
- نویسندگان: Nabi Banazadeh,Abdolreza Sabahi,Hasan Ziaadini,Arash Jalali Khalilabadi,Mohammad Banazadeh
- مشاهده