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Search Results: 1 - 10 of 793 matches for " Morteza Mansourian "
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Determinants of Childhood Obesity in Representative Sample of Children in North East of Iran
Fereshteh Baygi,Ahmad Reza Dorosty,Roya Kelishadi,Mostafa Qorbani,Hamid Asayesh,Morteza Mansourian,Kamal Mirkarimi
Cholesterol , 2012, DOI: 10.1155/2012/875163
Abstract: Childhood obesity has become, a global public health problem, and epidemiological studies are important to identify its determinants in different populations. This study aimed to investigate factors associated with obesity in a representative sample of children in Neishabour, Iran. This study was conducted among 1500 randomly selected 6–12-year-old students from urban areas of Neishabour, northeast of Iran. Then, through a case-control study, 114 obese (BMI≥95th percentile of Iranian reference) children were selected as the case group and were compared with 102 controls (15th≤BMI<85th percentile). Factors suggested to be associated with weight status were investigated, for example, parental obesity, child physical activity levels, socio-economic status (SES), and so forth. The analysis was conducted using univariate and multivariate logistic regression (MLR) in SPSS version 16. In univariate logistic regression model, birth weight, birth order, family extension, TV watching, sleep duration, physical activity, parents’ job, parents’ education, parental obesity history, and SES were significantly associated with children’s obesity. After MLR analysis, physical activity and parental obesity history remained statistically significant in the model. Our findings showed that physical activity and parental obesity history are the most important determinants for childhood obesity in our population. This finding should be considered in implementation of preventive interventions.
Determinants of Childhood Obesity in Representative Sample of Children in North East of Iran
Fereshteh Baygi,Ahmad Reza Dorosty,Roya Kelishadi,Mostafa Qorbani,Hamid Asayesh,Morteza Mansourian,Kamal Mirkarimi
Cholesterol , 2012, DOI: 10.1155/2012/875163
Abstract: Childhood obesity has become, a global public health problem, and epidemiological studies are important to identify its determinants in different populations. This study aimed to investigate factors associated with obesity in a representative sample of children in Neishabour, Iran. This study was conducted among 1500 randomly selected 6–12-year-old students from urban areas of Neishabour, northeast of Iran. Then, through a case-control study, 114 obese ( percentile of Iranian reference) children were selected as the case group and were compared with 102 controls ( percentile). Factors suggested to be associated with weight status were investigated, for example, parental obesity, child physical activity levels, socio-economic status (SES), and so forth. The analysis was conducted using univariate and multivariate logistic regression (MLR) in SPSS version 16. In univariate logistic regression model, birth weight, birth order, family extension, TV watching, sleep duration, physical activity, parents’ job, parents’ education, parental obesity history, and SES were significantly associated with children’s obesity. After MLR analysis, physical activity and parental obesity history remained statistically significant in the model. Our findings showed that physical activity and parental obesity history are the most important determinants for childhood obesity in our population. This finding should be considered in implementation of preventive interventions. 1. Introduction Obesity levels are increasing rapidly in children and youngsters of developed and developing countries [1, 2]. In 1998, the World Health Organization project monitoring of cardiovascular diseases (MONICA) showed that Iran is one of the seven countries with the highest prevalence of childhood obesity [3]. Overweight and obesity among Iranian children are becoming a major public health problem [4]. It is predicted that, by 2020, more than 60% of diseases and their related mortality and morbidity in the developing countries will be due to noncommunicable diseases, for many of which obesity is a potential risk factor [5]. Obesity is a multifactorial consequence. In addition to genetic, metabolic, socioeconomic, and cultural factors, life style habits as unhealthy diet, low physical activity levels, weight and order of birth and other factors like history of breast feeding, as well as the age and type of complementary food are among factors affecting obesity [6]. Therefore, this study was designed to identify probable factors that might affect obesity in a group of Iranian children. 2. Materials
Book Review: Web Search-Public Searching of the Web
Yazdan Mansourian
Webology , 2004,
Abstract: The book consists of four sections including (1) the context of web search, (2) how people search the web, (3) subjects of web search and (4) conclusion: trends and future directions. The first section includes three chapters addressing a brief but informative introduction about the main involved elements of web search process and web search research including search engines mechanism, human computer interaction in web searching and research design in web search studies.
Editorial Note
Yazdan Mansourian
Webology , 2004,
Abstract: This issue of Webology journal consists of some articles on different aspects of the web search research. In terms of the articles' theme, they can be divided into two main categories. The first category is mainly on reviewing research on search procedure on the web and encompasses Spink and Jansen's article (the first paper) and Asadi and Jamali's work (the third paper). The other category includes Narsesian's article (the second paper) and Safari's article (the fourth paper) which are discussions on some aspects of the web content and web resources organization.
Similarities and differences between Web search procedure and searching in the pre-web information retrieval systems
Yazdan Mansourian
Webology , 2004,
Abstract: This paper presents an introductory discussion about the commonalities and dissimilarities between Web searching procedure and the searching process in the previous online information retrieval systems including classic information retrieval systems and database. The paper attempts to explain which factors make these two groups different, why investigating about the search process on the Web environment is important, how much we know about this procedure and what are the main lines of research in front of the researchers in this area of study and practice. After presenting the major involved factor the paper concludes that although information seeking process on the Web is fairly similar to the pre-web systems in some ways, there are notable differences between them as well. These differences may provide Web searcher and Web researchers with some opportunities and challenges.
The Past, Present and Future of Web Search Research: An Interview with Dr. Amanda Spink
Yazdan Mansourian
Webology , 2005,
Abstract: This is an interview which was carried out at the University of Sheffield on Thursday 14th April 2005. The interview is mainly about the current trends and issues of web search research area and is divided into two parts. In the first section Dr. Spink explains her ideas about the area as a senior researcher who has published many papers and research reports on users' web search behaviours. In the second section Dr. Spink answers a few general questions to explain her views as one of the millions of web users who search this ocean of information everyday.
Chemoinformatics and the World Wide Web: An Interview with Professor Peter Willett
Yazdan Mansourian
Webology , 2006,
Abstract: This report is the direct transcription of an interview with Professor Peter Willett in March 7, 2006 and seeks to illustrate some general issues in chemoinformatics and its linkage with the related areas. Professor Willett is the head of Department of Information Studies at the University of Sheffield and is one of the well-known researchers in information retrieval (IR) in general and chemoinformatics in particular. The interview consists of two parts. The first part is related to Professor Willett's specific research area and its relation to the World Wide Web. In the second part he addresses some general issues about his personal experience of using the Web as an end-user rather than an expert in IR.
Serum Paraoxonase 1 Activity Is Associated with Fatty Acid Composition of High Density Lipoprotein
Maryam Boshtam,Amirnader Emami Razavi,Morteza Pourfarzam,Mohsen Ani,Gholam Ali Naderi,Gholam Basati,Marjan Mansourian,Narges Jafari Dinani,Seddigheh Asgary,Soheila Abdi
Disease Markers , 2013, DOI: 10.1155/2013/612035
Abstract: Introduction. Cardioprotective effect of high density lipoprotein (HDL) is, in part, dependent on its related enzyme, paraoxonase 1 (PON1). Fatty acid composition of HDL could affect its size and structure. On the other hand, PON1 activity is directly related to the structure of HDL. This study was designed to investigate the association between serum PON1 activity and fatty acid composition of HDL in healthy men. Methods. One hundred and forty healthy men participated in this research. HDL was separated by sequential ultracentrifugation, and its fatty acid composition was analyzed by gas chromatography. PON1 activity was measured spectrophotometrically using paraxon as substrate. Results. Serum PON1 activity was directly correlated with the amount of stearic acid and dihomo-gamma-linolenic acid (DGLA). PON1/HDL-C was directly correlated with the amount of miristic acid, stearic acid, and DGLA and was inversely correlated with total amount of ω6 fatty acids of HDL. Conclusion. The fatty acid composition of HDL could affect the activity of its associated enzyme, PON1. As dietary fats are the major determinants of serum lipids and lipoprotein composition, consuming some special dietary fatty acids may improve the activity of PON1 and thereby have beneficial effects on health. 1. Introduction Serum paraoxonase 1 (PON1) is a 45?kDa glycoprotein which can catalyze the hydrolysis of various organophosphates and nerve agents [1, 2] and also metabolize some drugs and prodrugs by its lactonase activity [3]. This enzyme which is located on high density lipoprotein (HDL) particles protects low density lipoprotein (LDL) phospholipids against oxidation [4]. Decreased PON1 activity has been addressed in several diseases such as coronary artery diseases (CAD) [5], type I diabetes [6], obesity [7], and renal failure [8]. It is evident that PON1 activity is influenced by a variety of agents like environmental, pharmacological, and lifestyle factors as well as age and sex [2, 5, 9–11]. Dietary fats have been suggested as an important relevant factor [12, 13]. Studies have presented that dietary fatty acids may affect PON1 activity [14]. Polyenoic fatty acids have shown considerable inhibitory effect on PON1 activity [15], while monoenoic acids (especially oleic acid) protect PON1 from oxidative inactivation [16]. It has been also indicated that replacement of dietary saturated fats with trans fats in healthy men and women leads to a small reduction in the serum PON1 activity [17]. Serum PON1 is almost exclusively found in association with HDL particles. The lipid
Thermodynamic Analysis of ZnO Crystal Growth from the Melt  [PDF]
Morteza Asadian
Journal of Crystallization Process and Technology (JCPT) , 2013, DOI: 10.4236/jcpt.2013.33012
Abstract: Recently, the efforts in solid-state materials include developing technologies capable of producing ZnO wafers in large dimensions and good quality based device applications. High quality bulk crystals are obtained by growing from high purity the melt. However, the thermochemical properties of ZnO (high melting point and high vapor pressure) make the growth of single crystals difficult. The thermodynamic calculations show that ZnO crystals can be grown from the melt if a suitable dynamic atmosphere composition is used. The oxygen requirement with increasing the temperature can be fulfilled by adding the NO-NO2 gases into the CO2 atmosphere. At ZnO melting point, the oxygen partial pressure of gas mixtures containing CO2-NO-CO-NO2 at Pt = 5 atm reaches to PO2 = 0.29 atm. According to this new thermodynamic result, it would be expected that ZnO crystal could be grown from the melt at lower total pressure comparing to pure CO2.
Application of the Two Nonzero Component Lemma in Resource Allocation  [PDF]
Morteza Seddighin
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.27072
Abstract:

In this paper we will generalize the author's two nonzero component lemma to general self-reducing functions and utilize it to find closed from answers for some resource allocation problems.

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