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Search Results: 1 - 10 of 471011 matches for " Aly A. El-Masry "
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Friction and Wear of Polymer Composites Filled by Nano-Particles: A Review  [PDF]
Ayman A. Aly, El-Shafei B. Zeidan, AbdAllah A. Alshennawy, Aly A. El-Masry, Wahid A. Wasel
World Journal of Nano Science and Engineering (WJNSE) , 2012, DOI: 10.4236/wjnse.2012.21006
Abstract: Composites formed by adding nano-scale particles to a polymer matrix results in improving electrical, mechanical, and thermal properties of the composite. Good tribological properties can be obtained for polymers filled with nano-scale fillers compared to that filled with micro-scale particles. The friction and wear resistance of these composites is found to increase with increasing filler concentration. It is also possible to use multi-functional fillers to develop high performance composites which cannot be achieved by using a single filler.
EFFECTS OF CAPSAICIN ON RAT SCIATIC NERVE IN VINCRISTINE-INDUCED NEUROPATHIC PAIN MODEL
Thanaa A. El-Masry *, Magda E. El Sayaad , Ibrahim A. Gaaboub and Wafaa M. Fouda
International Journal of Pharmaceutical Sciences and Research , 2013,
Abstract: Capsaicin, the pungent ingredient of red pepper, is used topically to treat different types of neuropathic pain, in rat model of vincristine induced neuropathic pain we tried to investigate the effect of capsaicin on sciatic nerve through electrophysiological and histopathological studies. We found that treatment of animals with vincristine results in significant decrease in sciatic nerve conduction velocity and degeneration of the nerve fibers, where combined treatment of vincristine and capsaicin showed highly significant decrease in sciatic nerve conduction velocity and degeneration of the nerve fibers compared with that treated with vincristine only. In new trial, we tried to investigate the effect of direct capsaicin titration on sciatic nerve fibers that results in nearly abolishment of nerve conduction velocity. All of these findings may illustrate the mechanism of capsaicin effect through afferent nerves degeneration.
Impact of Balanced Caloric Diet and Physical Activity on Body Composition and Fat Distribution of Obese Egyptian Adolescent Girls
Nayera El-morsi Hassan,Safaa T. Zak,Sahar El-masry,Manal A. Mohsen
Macedonian Journal of Medical Sciences , 2011,
Abstract: Objective. The aim of this study was to evaluate the effects of 6 months of balanced caloric moderately deficit diet program combined with individualized moderate Physical exercise on the body weight, body composition and fat distribution of adolescent girls. Subjects & Methods. It was a longitudinal survey comprised 1244 adolescent girls, aged from 14 to 18 years. Their body weight and height were measured, and the BMI was calculated. Of the total sample, only one hundred and eleven girls (8.9%), with mean age was 15.82 ± 0.75 years, were suffering from obesity based on their body mass index; which is greater than the 95th percentile for age and gender based Egyptian Growth Reference Charts. These obese girls were undergoing nutritional intervention (specific dietary program, nutritional education and exercise) for 6 months. At the start of this program, the obese girls were assessed for their anthropometric measures: the body weight, body height (or stature), body mass index (BMI), waist and hip circumferences, waist/hip ratio, skin folds thickness at 5 sites and, according to BIA, their body composition. This assessment was repeated after 6 months. Only thirty eight girls completely finished the program till the end. Results. The current study showed that after following the dietary program and physical activity, there were highly significant reduction in waist circumference, the skin fold thickness at the 5 sites (triceps, biceps, sub scapular, suprailiac and abdominal), peripheral and central adiposity, and fat mass, and significant reduction in body weight, hip circumference and fat%. The change in BMI was not significant. On the other hand, there was a highly significant increase of the total body water and Basal metabolic rate after following the dietary program and physical activity. Conclusion. The nutritional intervention program was succeeded in 38 obese adolescent girls. These girls show highly significant reduction in body composition and body fat distribution.This revealed that the combined program of diet restriction and exercise is necessary.
Total and Intra-Abdominal Fat Distribution in Obese Adolescents Using Different Techniques: Anthropometry, BIA and CT
Soha M Abd El-Dayem,Sahar A El-Masry,Hamed Elghawaby,Farid Gamil Amin
Macedonian Journal of Medical Sciences , 2012,
Abstract: Objectives: Assess the association between the anthropometric measurements of obesity, body composition with total and regional fat areas determined by CT in obese adolescents.Patients and method: 33 obese adolescents and 20 control group were assessed using anthropometry and body composition. CT measured total abdominal, subcutaneous and visceral fat areas. Results: Anthropometric, body composition and CT findings of fat content were significantly higher in obese adolescents. Visceral obesity estimated by CT in obese adolescents was significantly higher than control group (66.7 % vs. 15 %,). In obese subjects, total abdominal and subcutaneous fat had a significant positive correlation with BMI, waist, hip circumferences and Fat mass, while visceral fat had a significant positive correlation with total abdominal fat and waist circumference. In control subjects, total abdominal and subcutaneous fat had a significant positive correlation with BMI, waist, hip measurements, waist / hip ratio and fat free mass, while visceral fat had a significant positive correlation with BMI, waist, hip measurements, waist/ hip ratio, FM, PBF and total abdominal fat.Conclusion: CT is useful for diagnosis of visceral abdominal obesity in both obese and non obese subjects. Waist circumference is a good predictor of total abdominal, subcutaneous and visceral fat in obese adolescents.
Association between Anthropometric Parameters and Cardio-Metabolic Disease Risk Factors Among Obese Children and Adolescents
Nayera E Hassan,Sahar A El-Masry,Nadia L Soliman,Mona M El-Batran
Macedonian Journal of Medical Sciences , 2012,
Abstract: Background: Childhood obesity increases risk for developing cardio-metabolic diseases. Objectives: to investigate the relation of some anthropometric parameters with cardio-metabolic disease risk factors in obese children and adolescents.Subjects and Methods: Cross sectional study, comprised of 139 obese pupils; aged 8 to 16 years (classified to 3 age groups). Each pupil underwent complete physical examination, anthropometric and laboratory assessment (fasting blood sugar and lipid profile).Results: Boys had significantly higher values of abdominal skin fold thickness in the age groups II and III and in central adiposity, waist circumference, waist/hip ratio and sub scapular skin fold thickness in adolescents. For boys, fasting blood sugar correlated with most of the anthropometric measurements in young age, and with skinfold thickness in the three age groups. While lipid profile correlated with skinfold thickness particularly at subscapular area in the age groups I and II. For girls, none of the parameters under study showed any significant correlation except subscapular skinfold thickness which had significant correlations with lipid profile in age groups I and II.Conclusion: Skin fold thickness particularly subscapular; is important indicator for cardio-metabolic complications in obese children of both sexes. Obese boys are more liable to cardio-metabolic complications.
Different Techniques For Body Composition Assessment
Nayera E. Hassan,Sahar A. El-Masry,Nadia L. Soliman,Mona M. EL-Batran
Journal of Medical Sciences , 2008,
Abstract: The inter-relationships and alter nativity of body composition variables derived from simple anthropometry [BMI and Skin Folds (SFs) prediction equations] and Bioelectrical Impedance Analysis (BIA) with dual energy x-ray (DXA) of healthy sixty nine children (37 boys and 32 girls) aged 9.24±1.73 years old were evaluated. The children recruited from public schools in Giza governorate. All of them had BMI ranged between 15th and 85th percentile and were assessed for body composition [percentage body fat (%BF), fat free mass (FFM; kilograms) and body fat mass (BFM; kilograms)] using Slaughter Skin Folds (SFs) prediction equations, BIA and DXA. Repeated ANOVA showed significant differences among the three methods used for the studied variables (p<0.001). In general, Slaughter and BIA are significantly underestimated measured %BF. There is a high correlation between the BMI and both the estimated %BF and BFM (r = 0.67-0.91 for boys and r = 0.87 to 0.97 for the girls). Partial correlation among the estimated % BF derived from the three different methods in both genders revealed a high significant correlations between the estimated %BF derived from DXA and Slaughter equations (r = 0.76 for boys and 0.97 for girls). While the correlation between the estimated %BF derived from DXA and BIA was 0.77 for boys in contrast to girls where it is low significant correlation (r = 0.387). Results suggest that BIA has limited utility in estimating body composition, where as BMI and SFs seem to be more useful in estimating body composition. In conclusion all methods are significantly under estimated body fatness as determined by DXA and the various methods are not interchangeable.
Impact of Balanced Caloric Diet and Physical Activity on Body Composition and Fat Distribution of Obese Egyptian Adolescent Girls
Nayera El-morsi Hassan, Safaa T. Zaki, Sahar El-masry, Manal A. Mohsen, Eman Elashmawy
Macedonian Journal of Medical Sciences , 2011, DOI: 10.3889/MJMS.1857-5773.2011.0145
Abstract: Objective. The aim of this study was to evaluate the effects of 6 months of balanced caloric moderately deficit diet program combined with individualized moderate Physical exercise on the body weight, body composition and fat distribution of adolescent girls. Subjects & Methods. It was a longitudinal survey comprised 1244 adolescent girls, aged from 14 to 18 years. Their body weight and height were measured, and the BMI was calculated. Of the total sample, only one hundred and eleven girls (8.9%), with mean age was 15.82 ± 0.75 years, were suffering from obesity based on their body mass index; which is greater than the 95th percentile for age and gender based Egyptian Growth Reference Charts. These obese girls were undergoing nutritional intervention (specific dietary program, nutritional education and exercise) for 6 months. At the start of this program, the obese girls were assessed for their anthropometric measures: the body weight, body height (or stature), body mass index (BMI), waist and hip circumferences, waist/hip ratio, skin folds thickness at 5 sites and, according to BIA, their body composition. This assessment was repeated after 6 months. Only thirty eight girls completely finished the program till the end. Results. The current study showed that after following the dietary program and physical activity, there were highly significant reduction in waist circumference, the skin fold thickness at the 5 sites (triceps, biceps, sub scapular, suprailiac and abdominal), peripheral and central adiposity, and fat mass, and significant reduction in body weight, hip circumference and fat%. The change in BMI was not significant. On the other hand, there was a highly significant increase of the total body water and Basal metabolic rate after following the dietary program and physical activity. Conclusion. The nutritional intervention program was succeeded in 38 obese adolescent girls. These girls show highly significant reduction in body composition and body fat distribution. This revealed that the combined program of diet restriction and exercise is necessary.
Prevalence, Risk Factors and Impacts of Schistosomal and Intestinal Parasitic Infections Among Rural School Children in Sohag Governorate
H. M. El-Masry; Y. A. Ahmed; A. A. Hassan; S. Zaky*; E. S. Abd-Allah
Egyptian Journal of Hospital Medicine , 2007,
Abstract: Parasitic diseases represent a major cause of morbidity and mortality in childhood in most parts of the world. Hygiene and play habits make children especially vulnerable to schistosomal and parasitic infections. The aim of this study is to define the prevalence of different types of parasitic infections, to define their risk factors and to determine their impacts on health and scholastic absenteeism and achievement of rural school students in Sohag Governorate, Egypt. A cross-section, analytical study design was chosen to perform this research on 960 rural school students. All the students were interviewed and examined clinically and laboratory. The study showed that 38.5% of the students were infected by parasites. Entaemoeba histolytica, Enterobius vermicularis and Giardia lamblia had the highest percentages, 20.4%, 16.6% and 15.2%, respectively. Male sex, last birth order, poor personal hygiene, low socioeconomic level, 3 infected siblings, previous parasitic infections and no early consultation for therapy were important risk factors (ORs=1.41, 2.32, 2.63, 2.86, 4.17, 9.80 and 10.83, respectively). Also, 29.2% and 31.6% of infected students were below the 5th percentiles as regard weight-for-age and height-for-age, respectively. Anemia was present among 52.4% of infected students. Further, 3.2% of them had hepatomegaly. Also, 37.8% and 41.1% of infected students had 0-3 and 4-6 days/month absent, respectively, while, 34.3% of infected students had a scholastic achievement <50.0%. Improving personal and environmental hygiene and regular screening, treatment and health education for students as regard parasitic infections in Egypt is recommended.
Serum levels of soluble Fas, soluble tumor necrosis factor-receptor II, interleukin-2 receptor and interleukin-8 as early predictors of hepatocellular carcinoma in Egyptian patients with hepatitis C virus genotype-4
Abdel-Rahman N Zekri, Hanaa El-Din, Abeer A Bahnassy, Naglaa A Zayed, Waleed S Mohamed, Suzan H El-Masry, Sayed K Gouda, Gamal Esmat
Comparative Hepatology , 2010, DOI: 10.1186/1476-5926-9-1
Abstract: The following patients were recruited: 79 with HCV infection, 30 with HCC, 32 with chronic liver disease associated with elevated liver enzyme levels (with or without cirrhosis) in addition to 17 with chronic HCV with persistent normal alanine aminotransferase levels (PNALT). Nine normal persons negative either for HCV or for hepatitis B virus were included as a control group. All persons were tested for sFas, sTNFR-II, IL-2R and IL-8 in their serum by quantitative ELISA. HCC patients had higher levels of liver enzymes but lower log-HCV titer when compared to the other groups. HCC patients had also significantly higher levels of sFas, sTNFR-II and IL-2R and significantly lower levels of IL-8 when compared to the other groups. Exclusion of HCC among patients having PNALT could be predicted with 90% sensitivity and 70.6% specificity when sTNFR-II is ≥ 389 pg/ml or IL-8 is < 290 pg/ml.Serum TNFR-II, IL-2Rα and IL-8, may be used as combined markers in HCV-infected cases for patients at high risk of developing HCC; further studies, however, are mandatory to check these findings before their application at the population level.Hepatocellular carcinoma (HCC) ranks as the fifth most common cancer around the world and the third most frequent cause of cancer-related death. It represents the most common primary malignant tumor of the liver and is one of the major causes of death among patients with cirrhosis [1]. The increased incidence of HCC in the United States as well as in Japan over the past 20 to 30 years [2,3] has been partially attributed to the emergence of the hepatitis C virus (HCV), an established risk factor for developing HCC [4,5]. The prevalence of HCV infection varies significantly; higher rates have been reported in African and Asian countries, whereas industrialized nations in North America, northern and western Europe, and Australia had lower prevalence rates [6]. Egypt has the highest prevalence of HCV in the world, ranging from 6 to 28% [7-10], with an a
Thermal Relations, Metabolism and Winter Dormancy of the Sand Lizard, Acanthodactylus boskianus
El-Masry,H.K. Hussein
Pakistan Journal of Biological Sciences , 2001,
Abstract: Field and laboratory studies of thermal relations, metabolism and winter dormancy were conducted on the sand lizard, Acanthodactylus boskianus. During daily activity times the lizards were slightly, but significantly warmer than their environment. The standard metabolic rate was exponentially related to temperature. The maximum Q10 (3.86) occurred between 25 and 30°C and minimum one (1.56) between 35 and 40°C. There was no evidence of dormancy or reduced metabolism due to reduced temperature (to 15°C) in summer. Oxygen consumption was essentially the same in the field lizards and in captive ones held either in outdoor cages or at 15°C in summer, when measured at 15°C or 35°C, but consumption was significantly higher in both groups than in field animals when measured at 25deg;C. Lizards become dormant when exposed continuously to short photoperiods in winter. This lizard could not be maintained in an active condition through winter under laboratory conditions used successfully to keep other local lizards active. Despite the length of photoperiods used (8 h/day or 16 h/day), both groups showed a significantly reduced metabolic rate at 15°C comparable to those measured at 25°C or above. Therefore, dormancy and metabolic rate are controlled independently. The winter dormancy is controlled by reduced photoperiod, but lower metabolic rate is controlled by reduced temperature.
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