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Search Results: 1 - 10 of 676 matches for " Tahereh Kazemi Vakilabady "
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Bacterial Quality of Drinking Water in Bushehr Intercity Buses in 2010
Dariush Ranjbar Vakilabadi,Sina Dobaradaran,Tahereh Kazemi Vakilabady,Rahim Tahmasbi
Journal of Fasa University of Medical Sciences , 2012,
Abstract: Background and Objective: Road transportation and specifically bus travel accounts for the bulk of travel. Contaminated drinking water consumption is one of the issues that threaten health, and always there is pollution possibility in drinking water in buses. This study evaluated the microbial quality of consumed drinking water in buses and also compared it with available standards. Materials and Methods: This study is a cross-sectional study. By considering similar studies, 95% confidence interval and based on the samples size formula for tradition of proportion, 80 buses from 122 buses that entered Bushehr Passenger Depot from other cities or exited it were randomly selected. Over a three-month period, samples were taken from drinking water in these buses. Temperature, pH, residual chlorine, total coliform (TC), and fecal coliform (E. coli) in each sample were measured in accordance with the standard method. Statistical analysis of the data was carried out with SPSS Version 16, and the t-test was performed for statistical difference. Results: The results showed that residual chlorine in 97.5% was zero and pH values of the samples were in the range of 6.8-8.7. TC and E. coli numbers in 12.5% and 8.8% of the samples were higher than those of standards, respectively. Conclusion: Use of ice, washing time of the drinking water tank (daily or weekly), and method of usage and storage of drinking water (with 20-liter tanks) had significant effects on the bacterial loads of the drinking water in the tanks (p value <0.05). Some factors such as tank material, driver's education and age, type and model of the bus, filling time of the tank (daily or weekly), the method of filling and emptying the tank (complete clearing out of the tank or otherwise), and distance had no significant effect on the quality of the drinking water in the buses.
Additive effect of MTHFR and GRIN1 genetic polymorphisms on the risk of schizophrenia
Ali Mohammad Foroughmand, Hamid Galehdari, Atefeh Pooryasin, Tahereh Ajam, Seyed Reza Kazemi Nezhad
Molecular Biology Research Communications , 2015,
Abstract: Schizophrenia is a complex disorder with polygenic inheritance. The MTHFR gene (OMIM: 607093) plays an important role in the folate metabolism. It has been suggested that C677T (rs1801133) and A1298C (rs1801131) genetic polymorphisms in the MTHFR gene lead to the decreased activity of the methylenetetrahydrofolate reductase enzyme which may have significant effect on developing schizophrenia. We used a case-control study to establish the possible association between the C677T and the A1298C polymorphisms and susceptibility to schizophrenia in an Iranian population. The genotypes of the polymorphisms were determined using PCR-RFLP. The data were analyzed by logistic regression model. Data analysis revealed that the combination genotypes of 677CT/1298AA, 677CC/1298CC, 677TT/1298AA, 677CT/ 1298AC and 677CT/1298CC increase the risk of schizophrenia. In order to evaluate the effect of combined genotypes of the three mentioned polymorphic loci, the frequencies of the compound genotypes were compared between control and patient groups (Table 4). Base on the results, the existence of >4 risk factors showed about 32-fold increased risk for schizophrenia (OR=32.3, 95% CI: 5.52-188, P=<0.001).
A survey of factors associated with soft drink consumption among secondary school students in Farooj city, 2010
Tahereh Dehdari,Tahereh Mergen
Journal of Jahrom University of Medical Sciences , 2012,
Abstract: Introduction:There is a high tendency for consumption of soft drinks in Iran and worldwide. Scientific and medical community is concerned about the harmful side effects of such drinks. This study aimed to determine the factors associated with soft drink consumption in secondary school students in Farooj city in 2010.Material and Methods:This is a descriptive-analytical study. A convenience sample included 222 students studying in secondary schools in Farooj city. They were selected through multi-stage sampling method. The data were collected through two questionnaires made by the researcher. Reliability and validity of the scales were estimated. The data were analyzed using SPSS software for Windows. Results:The results showed that 94.1% of the students regularly consume soft drink. The majority of the students are drinking it at home and then in the parties. About half of the students reported that soft drink consumption can increase obesity, osteoporosis, teeth decay and reduce the appetite. Important reasons for soft drink consumption among the students were consumption of soft drink by friends, enjoying soft drink with meals, interest in flavored soft drinks and receiving pocket money of parents. Conclusion:The rate of consumption of soft drinks among the students is high. Interventional programs focusing on the most important factors affecting its consumption are recommended to be held.
Association between efficient adhesion to HEp-2 cells and severity of gastritis in Helicobacter pylori strains isolated from children
Tahereh Falsafi
Iranian Journal of Microbiology , 2009,
Abstract: Background and objectives: Helicobacter pylori causes chronic gastritis, peptic ulceration, and is a risk factor for gastric cancer. More than half of the world`s population is infected with this pathogen, however the disease outcome varies. Among the virulence factors of H. pylori, specific adhesions to gastric epithelium may be an important step in the induction of active inflammation. H. pylori displays considerable genetic diversity attributed to genetic drift during long-term colonization. Heterogeneity of clinical-isolates has considerably impacted in understanding the role of each factor in infection outcome. However, genetic change may be more limited in the stomach of children in the short period after infection. This work evaluates differences in adherence potential of strains isolated from children with various chronic- inflammation status."nMaterials and Methods: A total of 157 children admitted to Medical Center of Tehran for upper gastrointestinal problems underwent endoscopy for H. pylori infection. Histological examination of their biopsies was performed after H& E and Giemsa staining. Gastritis and inflammation were graded according to the updated Sydney system. 70 culture-positive children, 20 were selected according to their histopathological status. Adherence of their H. pylori isolates to HEp- 2 cells was evaluated by viable count of bacteria associated with host cells in an optimized procedure developed in this study."nResults: Correlation was seen between inflammation severity score and efficiency of adhesion to HEp-2 cells. This correlation was not observed in the KB cell line as an epithelial cell-model."nConclusion: Specific interaction of H. pylori with host gastric epithelium may be associated with disease outcome
Prevalence of Physical and Sexual Abuse in Women and Children
Tahereh Farhadian
Zahedan Journal of Research in Medical Sciences , 2012,
Abstract: Background: The purpose of this study is to investigate the prevalence of physical and sexual abuse and its respective factors in women and children referring to medical and health centers of Birjand county.Materials and Methods: A number of 301 women referring to medical and health centers of Birjand were entered into this analytical-descriptive study. Based on the research objectives, a self-administered questionnaire was prepared and approved in terms of content validity by experts of the field. The data were analyzed using SPSS-15, at a significance level of p ≤0.05.Results: Results showed that 58.8% and 25.3% of the subjects experienced physical abuse and sexual abuse, respectively. 24.3% confirmed physical abuse and 1.7% confirmed sexual abuse of their children by their husbands. There was a significant relationship between physical and sexual abuse, and the education level, husband’s education level, addiction and commitment of husband, economical disputes, husband’s job, disputes over rearing children, mental disorders of husband, and the weakness of husband in controlling his motions (p=0.001).Conclusion: The prevalence of physical and sexual abuse in women and children is relatively high, and based on the investigated related causes, it is necessary to reduce such prevalence through an appropriate planning.
Wormhole Geometries In $f(R,T)$ Gravity
Tahereh Azizi
Physics , 2012, DOI: 10.1007/s10773-013-1650-z
Abstract: We study wormhole solutions in the framework of f (R,T) gravity where R is the scalar curvature, and T is the trace of the stress-energy tensor of the matter. We have obtained the shape function of the wormhole by specifying an equation of state for the matter field and imposing the flaring out condition at the throat. We show that in this modified gravity scenario, the matter threading the wormhole may satisfy the energy conditions, so it is the effective stress-energy that is responsible for violation of the null energy condition.
Determining the Relationship between Religious Attitude and Dimensions of Anger (Case Study: Secondary School Students in Chalous City)
Tahereh Khodaparast
International Journal of Nations Research , 2018, DOI: -
Abstract: Religion is an organized view of beliefs; Moral values customs, participation in the religious community for a more conscientious belief in God or a superior power. Religious beliefs are an effective way to deal with painful experiences and signs of illness. It also affects the human relationships during times of trouble and discomfort. Because religion is considered as an important element in culture and cognitive therapies are strongly influenced by cultural backgrounds, beliefs and values within the culture and according to the religious context of Iran the present study was carried out to investigate the relationship between religious attitude and anger dimensions among high school students in Chalous city. This study is descriptive-correlational that the statistical population of this research includes all high school students (1005) who are studying in the city of Chalous in the academic year of 2017-2018. A sample research of 320 students selected randomly. The results of this study show that there is a meaningful relationship between religious attitude and interpersonal violence at the level of 0.001. There is also a meaningful negative relationship between religious attitude and inter-personal violence at the level of 0.001.
The Effect of Financial Flexibility on Financial Behavior of Companies Listed in Tehran Stock Exchange  [PDF]
Tahereh Alsadat Mirkhalili, Hamid Khajeh Mahmoudabadi
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.81009
Abstract: The flexibility plays an important role in making the managers powerful in the regard of investment in the future. The problems of the capital market have necessitated the maintenance of flexibility for the companies for the purpose of using profitable opportunities. The present research has aimed to study the effect of financial flexibility on the financial behavior. The statistic sample used in the present study consists of 100 companies accepted in Tehran stock exchange during the years 2009 to 2015. The financial flexibility and financial behavior are respectively the independent and dependent variables which were measured by the investment activity, dividend payout ratio, amount of cash holding and company value. The data analysis was done by the use of the multi-variable regression models based on the panel data techniques and the use of Eviews econometrics software. The results concluded from the study of effect of the financial flexibility on the financial behavior corresponding to the theoretical foundations which had meaningful and positive effects. Therefore, the hypothesis that the financial flexibility has positive and meaningful effects on the investment activity of the companies accepted in the stock exchange was confirmed. The other results of paper were that the financial flexibility had negative and meaningful effects on the dividend payout ratio. So, the hypothesis that the financial flexibility has negative and meaningful effects on the dividend payout ratio of the companies accepted in the stock exchange was not confirmed. The hypothesis that the financial flexibility has positive and meaningful effects on the amount of cash holding of the companies accepted in the stock exchange was not confirmed, because the effect of the flexibility on the amount of cash holding was not meaningful. Also, the hypothesis that the financial flexibility has positive and meaningful effects
A Direct Derivation of the Exact Fisher Information Matrix for Bivariate Bessel Distribution of Type I  [PDF]
Mohammad Reza Kazemi, Alireza Nematollahi
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.33043
Abstract: This paper deals with a direct derivation of Fisher’s information matrix for bivariate Bessel distribution of type I. Some tools for the numerical computation and some tabulations of the Fisher’s information matrix are provided.
Was There a Contagion during the Asian Crises?  [PDF]
Hossein S. Kazemi, Ayla Ogus
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.41007
Abstract:

The contagion of financial crises surrounding the markets around the world has been in the forefront of academic and public discussions. In this paper, we attempt to study the “contagion effect” of the stock market crises around the world by studying the correlations of global stock returns and volatility. We analyze the daily returns of major stock indexes around the world to discover the timing and path of the transmission of shocks that manifest themselves in stock market returns. We construct VARs of major stock market index returns and volatilities. Our work differs from the literature in analyzing spillover effects between emerging markets and other major stock markets.

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