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Search Results: 1 - 10 of 144465 matches for " F. Salamat "
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A 20-Year Retrospective Study of Salivary Gland Adenoid Cystic Carcinoma in a Sample of Iranian Patients
M. Khalili,F. Salamat
Journal of Dentistry of Tehran University of Medical Sciences , 2009,
Abstract: Objective: The aim of the present study was to investigate the demographic and pathological aspects of adenoid cystic carcinomas (ACC) in an Iranian sample based on a 20-year archive review.Materials and Methods: In this descriptive study, tumors of the head and neck registered between 1980 and 2000 were evaluated and cases of ACC were selected. Patients’ medical records and pathology reports were reviewed. Variables such as age, sex, duration of disease,symptoms, site of tumor involvement and tumor diameter as well as pathologic features were recorded. Analysis was performed using chi-square and t-tests; P<0.05 was considered as the level of significance.Results: ACC was the most common malignant tumor followed by mucoepidermoid carcinoma and adenocarcinoma NOS. A total of 120 ACCs were found, of which 50.8% occurred in females and 49.2% in males. Patients’ ages ranged from 5 to 90 with a mean of 49.2 (SD=15.9) years. In 60.9% of cases, minor salivary glands were involved and the palate was the most common site. The greatest tumor diameter was between 2-15cm with a mean of 4.6 cm (SD=2.9). The most prevalent histologic appearance was cribriform, followed by tubular pattern. No significant relation was observed between lymph node metastasisand patients’ age, sex, disease duration, greatest tumor diameter and site of involvement.Conclusion: Our findings were relatively similar to other reports from different parts of the world. Further analytic and case-control studies are recommended to gain a better understanding of different aspects of ACC.
A First-order Phase Transition to Metallic Hydrogen
Mohamed Zaghoo,Ashkan Salamat,Isaac F. Silvera
Physics , 2015,
Abstract: The insulator-metal transition in hydrogen is one of the most outstanding problems in condensed matter physics. The high-pressure metallic phase is now predicted to be liquid atomic from T=0 K to very high temperatures. We have conducted measurements of optical properties of hot dense hydrogen in the region of 1.1-1.7 Mbar and up to 2200 K. We observe a first-order phase transition accompanied by changes in transmittance and reflectance characteristic of a metal. The phase line of this transition has a negative slope in agreement with theories of the so-called plasma phase transition.
Variation of the Carabelli Cusps in Maxillary First Molars by Casts within 8-15 Year Old Referred to Dental School of Guilan University of Medical Sciences
M Eskandari,M Rabiei,F Salamat,ME Farhadi
Journal of Shahid Sadoughi University of Medical Sciences , 2012,
Abstract: Introduction: Teeth are valuable sources of information for anthropological and paleontological studies due to the variation in their shape and size. Dental morphological characteristics are useful to provide information for phylogenic and genetic studies as well as understanding variation within and among species. The goal of this study was to determine variation of the Carabelli cusps within the 8-15 years old who referred to Dental School of Guilan University of medical sciences. Methods: In this research the stone models of 231 children (103boy and 128girl) aged 8-15 were evaluated to determine the frequency of Carabelli cusps. This research was based on Dahlberg scale that involves 8 scores. In order to analyze data, SPSS.v.11.5, and to report results, frequency tables and Chi Square test were used. Results: Prevalence of Carabelli cusps was totally 85.7%. Most of them, according to grade 1 of Dahlberg scale, were assigned to the small vertical ridges. Distribution of this feature among boys and girls was equal and no significant differences were found between the sexes (p=0.658). Conclusions: This feature has significant presence in Iranian society. This variation in the population of our study was more likely to grade 1, with 27.7% in general of which 22.3% was devoted to men and 32% to women. Therefore, the probability that Gene or genes which cause traits, are located on sex chromosomes is faded, and we can conclude it may be inherited by autosomal chromosomes.
Manipulation of the Rumen Microbial Environment with Thyme Extracts in Ruminants Using the Nylon Bags Technique
Mohammad Salamat Azar
Pakistan Journal of Nutrition , 2012,
Abstract: The objective of this study was to investigate the effects of thyme methanolic extract on ruminal Dry Matter (DM) degradation parameters of sunflower meal. Treatments were: Sunflower meal (no additive), thyme methanolic extract (0.15 ml/30 ml buffered rumen fluid). In situ rumen degradability was performed with of three Gezel rams rumen fistulaed in times at 0, 2, 4, 8, 16, 24 and 48 h. Potential degradation (a+b) for sunflower meal and thyme methanolic extract (0.15 ml/30 ml buffered rumen fluid) were estimated, 76.82 and 80.47%, respectively. Effective rumen degradable dry matter for sunflower meal and thyme methanolic extract (0.15 ml/30 ml buffered rumen fluid) at a rate of 0.08/h, 45.33 and 50.03%, respectively were estimated. Thyme methanolic extract (0.15 ml/30 ml buffered rumen fluid) treatments significantly decreased dry matter gradability of sunflower meal on different incubation times. Although thyme methanolic extract (0.15 ml/30 ml buffered rumen fluid) decreased (p<0.05) the water soluble fraction (a) and Effective Rumen Degradability of Dry Mattre (ERDM) at a rate of 0.02/h but increased (p<0.05) the potentially degradable fraction (b) of DM, constant rate of degradation (c), total degradability (a+b) and Effective Rumen Degradability of Dry Matter (ERDM) at a rate of 0.05 and 0.08/h.
Artificial Reproduction of Octocoral (Plumarella flabellata)
Fariba Heidari and Negin Salamat*
Pakistan Veterinary Journal , 2012,
Abstract: The reproductive biology of Octocoral (Plumarella flabellata) in artificial habitats located in Northwest of Persian Gulf, Iran was studied by histological examination of gonad development. Various sizes of colonies were collected to determine the relationship between colony size and sexual maturity. The colonies smaller than 15 cm height did not contain gonads. Moreover, P. flabellata was a hermaphrodite species with gonads developed along with mesenteries. No planulae were observed in the samples investigated. Therefore, P. flabellata in Iran is most likely a broadcast spawener. The gonads were at the same developmental stages in each season. The results showed that spawning of P. flabellata probably occurred in July-August which is consistent with the suitable environmental conditions such as higher water temperature and long day-light. The present study indicated that P. flabellata exhibits a remarkably high reproductive potential, which contributes to its dominance in the artificial reef in Northwest of Persian Gulf.
Determining Nutritive Value of Sunflower Meal for Ruminants using Nylon Bags Technique
Mohammad Salamat Azar
Current Research Journal of Biological Sciences , 2012,
Abstract: This study was carried out to determine the chemical composition and ruminal degradability of sunflower meal. Samples were collected from commercial sources in Iran. Chemical composition for Dry Matter (DM), Crude Protein (CP) and Neutral Detergent Fiber (NDF) of pooled samples were 95.88, 30 and 45.08%, respectively. Degradation procedure was performed using nylon bags filled with 5 g of sunflower meal and suspended in the rumen of three fistulated Gezel rams for 0, 2, 4, 8, 16, 24 and 48 h and obtained data were fitted to a non-linear degradation model to calculate ruminal degradation characteristics. Results showed that soluble fraction (a), potentially degradable fraction (b), rate degradability (c) and Potential degradability (a + b) of sunflower meal for Organic Matter degradability were 25.081, 52.546, 0.0987 and 77.627% and for effective degradability (Out flow rate 0.02, 0.05 and 0.08/h) were 68.766, 59.933 and 45.10%, respectively.
Effects of Thyme methanolic Extract on Ruminal Protein Degradation of Soybean Meal using Nylon Bag Technique
Mohammad Salamat Azar
Current Research Journal of Biological Sciences , 2011,
Abstract: This study was conducted to evaluate effects of Thyme methanolic extract (0 and 0.15 mL/30 mL buffered rumen fluid) on ruminal Crude Protein (CP) degradation parameters of Soybean Meal (SBM). Nylon bags filled with 5 g of each of untreated or Thyme methanolic extract treated soybean meal, were suspended in the rumen of three fistulated Gezel rams for 0, 2, 4, 8, 16, 24 and 48 h, and obtained data were fitted to a nonlinear degradation model to calculate ruminal degradation characteristics. Thyme methanolic extract treatments significantly decreased protein degradability of soybean meal on different incubation times. Effective rumen degradable crude protein at a rate of 0.02/h, for untreated and Thyme methanolic extract treated soybean meal, 82.43 and 77.80%, respectively were estimated. Although Thyme methanolic extract decreased (p<0.05) the water soluble fraction (a), constant rate of degradation (c) and total degradability (a+b) of CP degradation but potentially degradable fraction (b), were not significantly affected by Thyme methanolic extract.
Thermoelectric Module for Low-Voltage Loads  [PDF]
Reynaldo G. Salamat
Open Access Library Journal (OALib Journal) , 2014, DOI: 10.4236/oalib.1101185
Abstract: The focus of this paper is to develop a thermoelectric module for low-voltage loads that will satisfy the electrical use and stored charges in the improvised power bank that can be used by the students and the faculty in everyday life or even in emergency. This project will benefit the BIT and COE students of the Bulacan State University, and the professionals: drafters, architects, engineers or even hikers, adventure seekers and future researchers. The thermoelectric module is composed for low-voltage loads as computer processor coolers, DC motor, LED lamp and most specially the thermoelectric module applications. All the necessary equipment is researched and gathered together into the project making mini-generator used in a smart, nice and in most usable way by the students. It has a thermoelectric module that converts temperature into electricity. The body is made up of wood that holds and protects the project. The project is made up of locally available materials. The findings of the study revealed that the thermoelectric module for low- voltage loads was functional, durable, user-friendly, cost-effective and safe. All materials are cheap, and have a good and trusted quality that may help the people in making life more convenient. The project was rated by (100) respondents from the drafting students and faculty. It gains an overall rating of (4.08) which means that the project is very acceptable. Specifically the researchers answered the objectives of the study that proved usefulness and safety of the project. Therefore, the evaluators are agreed to the acceptability of the project.
Relationship between Weight, Body Mass Index, and Bone Mineral Density in Men Referred for Dual-Energy X-Ray Absorptiometry Scan in Isfahan, Iran
Mohammad Reza Salamat,Amir Hossein Salamat,Iraj Abedi,Mohsen Janghorbani
Journal of Osteoporosis , 2013, DOI: 10.1155/2013/205963
Abstract: Objective. Although several studies have investigated the association between body mass index (BMI) and bone mineral density (BMD), the results are inconsistent. The aim of this study was to further investigate the relation between BMI, weight and BMD in an Iranian men population. Methods. A total of 230 men 50-79 years old were examined. All men underwent a standard BMD scans of hip (total hip, femoral neck, trochanter, and femoral shaft) and lumbar vertebrae (L2-L4) using a Dual-Energy X-ray Absorptiometry (DXA) scan and examination of body size. Participants were categorised in two BMI group: normal weight <25.0?kg/m2 and overweight and obese, BMI ≥ 25?kg/m2. Results. Compared to men with BMI ≥ 25, the age-adjusted odds ratio of osteopenia was 2.2 (95% CI 0.85, 5.93) and for osteoporosis was 4.4 (1.51, 12.87) for men with BMI < 25. It was noted that BMI and weight was associated with a high BMD, compatible with a diagnosis of osteoporosis. Conclusions. These data indicate that both BMI and weight are associated with BMD of hip and vertebrae and overweight and obesity decreased the risk for osteoporosis. The results of this study highlight the need for osteoporosis prevention strategies in elderly men as well as postmenopausal women. 1. Introduction Obesity and osteoporosis are two important and growing public health problems worldwide [1–3], and osteoporotic fractures are among the main concerns of elderly population. Low bone mineral density (BMD) is a major risk factor for osteoporosis and its related fractures [3]. Relationship between body mass index (BMI), weight, height, and BMD was reported for many populations [4–6]. Body weight or BMI has been found to be inversely related to the risk of osteoporotic fracture [3, 7]. BMD appears to be reduced in lean postmenopausal women in most [8–18] but not all studies [4, 19–22]; in some studies BMD was reduced [4, 20, 23, 24], whereas in other studies BMD was increased [8–15, 22]. Thus, the role of obesity as a risk factor for low BMD, osteoporosis, and its related fractures remains unsettled. While there have been abundant epidemiological studies in postmenopausal women, few studies have examined the relationship between BMI, weight, and BMD in men and no study has been undertaken in Iranian men. Different associations may be expected in men who have a different lifestyle, such as different levels of activity and different eating habits. However, from clinical and public health point of view, it is important to clarify the role of BMI and weight in association with BMD. Our study contributes to this
Quality and Inequality of Jobs Created in MENA Region: The Case of Labor Market in Jordan
Ibrahim Mohammad Alhawarin,Mamdouh Salamat
International Journal of Business and Management , 2012, DOI: 10.5539/ijbm.v7n2p200
Abstract: Using micro-level data sets, the current study constructs a Job Quality Index (JQI) for Jordanian wage and salary workers. Due to the unavailability of data for some years, the study covers only the period 2000–07. Factor Analysis is utilized to compile the index based on the following four dimensions: adequate earnings; underemployment and overemployment (which together represent adequate working hours); and social security. The main findings of the study are as follows: (1) The JQI appears to have improved in 2007 compared to the mid-2000s, reaching similar levels of those prevailing in 2000. (2) There exists a persistent gender gap in favor of male workers, whose jobs are characterized by a higher JQI. This finding does not change even when taking into account other intervening variables, particularly a worker’s age. Good jobs as a percentage of total jobs held by females appear to decline in 2007, unlike males, whose share of good jobs has grown in the same year. Therefore, no sign of convergence in job quality between males and females is detected. (3) JQI varies across education levels, however, less obviously. Workers with basic education and lower are found to obtain considerably poorer jobs and jobs generally characterized with lower JQIs. (4) The JQI differs across age groups. New entrants to the labor market and workers on the verge of retirement are more likely to have lower job quality in comparison with other workers belonging to age groups in the middle of their work lives. (5) The quality of jobs in agricultural activities is found to be on average lower than other activities. On the other hand, real estate activities tend to have higher job quality ratings than other sectors, especially in 2007.
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