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Evaluation of significance of positive familial history in prevalence of hypertension in Isfahan
Tavassoli A,Rafieei M
Tehran University Medical Journal , 1997,
Abstract: Hypertension is one of the most important modifiable risk factors of vascular heart disease. Control of hypertension in different age groups has a significant effect upon the control and prevention of vascular heart disease. A familial pattern is observed in the distribution of blood pressure in different societies. Family history of hypertension has a profound effect on the future risk of developing hypertension. The blood pressure of approximately 8150 inhabitants of Isfahan aged above 18 years was measured during 1993-94. Blood pressure measurements were performed according to the standards set by WHO i.e., on two separate occasions, in the sitting position, and from both arms. A questionnaire was completed consisting of 26 questions, including questions regarding history of hypertension in first and second-degree relatives. Cases with a blood pressure of 140/90 mmHg or more, were referred to the Cardiovascular Research Center of Isfahan for further evaluation. Mean systolic and diastolic blood pressure was higher in cases with a positive family history of hypertension. In this study, 37.4% of the men with hypertension and 45.4% of hypertensive women had positive history of hypertension in first-degree relatives. The association between positive family history and hypertension was not significant in men (P=0.62), but it was significant in women (P=0.000). This difference was less pronounced in the older age groups, which could be explained by the illiteracy of most of the older cases and their ignorance of the existence of hypertension in family members. After correcting for the effects of confounding factors, it appears that positive family history has a stronger association with the development of hypertension in women. Moreover, positive family history is a strong prognostic factor in the likelihood of hypertension in the children of affected cases. These findings emphasize the importance of routine blood pressure measurement in children and adolescents.
Reconstruction of Interfering Waves from Three Dimensional Analysis of Their Interference Pattern
M. T. Tavassoli,A. Doroudi
Iranian Journal of Physics Research , 1997,
Abstract: Optical interferometry is being used as an efficient tool to analyse smooth surfaces for more than a century. Although, due to introduction of novel computer assisted analyzing techniques and array detectors, like CCD, the speed and the precision of processing have been increased tremendously, but the main equation involved is not changed. The main equation is the intensity distribution in the interference pattern of a plane reference wave and the required wave. In the paper it is shown that by analysis of the interference pattern of two unknown waves in three dimension (which is possible for coherent waves) it is possible to reconstruct each wave separately. This approach has several useful applications, namely, on can do without reference plane wave in the interferometric surface analysis and, it is possible to reconstruct an unknown wave by making it to interfere with itself. This is very useful in determining the profile of laser beams and erasing the effect of atmospheric disturbances on observing astronomical objects.
Models of fragmentation with power law log-normal distributions
Z. Tavassoli,A. Esmaeilnia Shirvani
Physics , 2000, DOI: 10.1016/S0378-4371(00)00213-2
Abstract: Two models of binary fragmentation are introduced in which a time dependent transition size produces two regions of fragment sizes above and below the transition size. In the models we consider a fixed rate of fragmentation for the largest fragment and two different rates of fragmentation for the two regions of sizes above and below the transition size. The models are solved exactly in the long time limit to reveal stable time-invariant solutions for the fragment size distributions. A rate of fragmentation proportional to the inverse of fragment size in the smaller size region produces a power law distribution in that region. A rate of fragmentation combined of two terms, one proportional to the inverse of the fragment size and the other proportional to a logarithmic function of the fragment size, in the larger size region produces a log-normal distribution in that region. Special cases of the models with no fragmentation for the smaller fragments are also considered. The similarities between the stable distributions in our models and power law log-normal distributions from experimental work on shock fragmentation of long thin glass rods and rupture of mercury droplets are investigated.
Effect of Zinc and Manganese Nutrition on Fruit Yield and Nutrient Concentrations in Greenhouse Tomato in Hydroponic Culture
A. Tavassoli,A. Ghanbari,A. Ahmadian
Journal of Science and Technology of Greenhouse Culture , 2010,
Abstract: This research was performed in a completely randomized block design with four replications to investigate zinc (Zn) and manganese (Mn) nutrition effects on greenhouse tomato (Lycopersicon esculentum Mill. cv. HAMRA) in a perlite-containing media. Experimental treatments were: (1) control (Mn and Zn-free nutrient solution), (2) application of Mn in a concentration equal to the full Hoagland’s nutrient solution (4.06 mg/l), (3) application of Zn in a concentration equal to the full Hoagland’s nutrient solution (4.42 mg/l), (4) application of Mn and Zn in concentrations equal to the 50% Hoagland’s nutrient solution (2.03 mg/l Mn + 2.21 mg/l Zn), and (5) application of Mn and Zn in concentrations equal to the full Hoagland’s nutrient solution (4.06 mg/l Mn + 4.42 mg/l Zn). Results showed that the highest fresh-fruit yield, fruit and leaf dry matter and content of Mn and Zn in fruit were obtained from single or combined application of Mn and Zn in concentrations equal to the full Hoagland’s nutrient solution. In addition, Zn and Mn nutrition significantly affected the fruit concentrations of crude protein, nitrogen and phosphorus, while the effect of these treatments on fruit size of tomato was not significant.
Resection and Reconstruction of Small Intestine with Ligasure and Linear Stapler: A Comparative Study
A Tavassoli,A Abdollahi,H Golmohammadzadeh
Tehran University Medical Journal , 2012,
Abstract: Background: Regarding the limited number of studies on the feasibility of resection and repair of the small intestine by ligasure, we performed this study to compare ligasure with linear stapler for the previously mentioned operation.Methods: This phase 1 clinical trial study was performed in Ghaem Hospital, an educational hospital affiliated to Mashhad University of Medical Sciences, from 2010 to 2011. After obtaining permission from the University's ethics committee and a written informed consent from each patient, we recruited 18 patients. The participants who had morbid obesity and were candidates for laparoscopic gastric bypass surgery were randomly allocated to two stapler and ligasure groups. The data were collected and analyzed by three statistical tests, including Mann-Whitney U test, by SPSS 16.Results: All patients were female with the age range of 20-65 years. Cost in the stapler group ranged between 29,500,000 to 40,000,000 Rial (mean 31,830,000± 3,500,000 Rials) and in ligasure group it was between 24,000,000 to 35,000,000 Rials (mean 26,720,000± 3,290,000 Rials). There was a significant difference between the two groups in cost (P=0.004(. Duration of the operations were 200±3.4 and 240±10 minutes in the stapler and ligasure groups, respectively. The difference in duration was significant between the two groups (P=0.043). No significant differences were observed in complications.Conclusion: Application of ligasure in resection and reconstruction of small intestine is more cost-effective than stapler, although duration of surgery is longer.
surgical treatment for chronic pancreatitis: report of three cases
Abdollahi A,Maddah GH,Tavassoli A
Tehran University Medical Journal , 2009,
Abstract: "nBackground: Chronic pancreatitis is a progressive fibrosis of the pancreas that leads to loss of endocrine and exocrine function of pancreas. The most common symptom is intractable pain. Which adversely effects quality of life, remains the most common indication for surgery in patients with chronic pancreatitis. Case report: Three patients underwent operations for chronic pancreatitis at the Ghaem hospital, Mashhad University of Medical Sciences Mashhad, Iran. Indication for operation in all cases were intractable abdominal pain. In all of the three patients complete relief of symptoms was obtained. There was no morbidity and mortality. In one patient exocrine function of pancreas and malabsorpation resolved after surgery. Conclusions: Although chronic pancreatitis is uncommon, but in persistent abdominal pain surgery should be considered. Surgery for patients with chronic pancreatitis can be performed safely with minimal morbidity and effective in control of pain and malabsorption.
Repair of inguinal hernia: a comparison between extraperitoneal laparoscopy and Lichtenstein open surgery
Tavassoli A,Ghamari MJ,Esmaily H
Tehran University Medical Journal , 2010,
Abstract: "n Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial; mso-bidi-theme-font:minor-bidi;} Background: The inguinal hernia is a common disorder in general surgery. Different methods have been described for repair of these hernias. In modern methods, synthetic mesh is used to cover the wall defect and the most known method is Lichtenstein surgical repair. The laparoscopic totally extra peritoneal procedure (TEP) is a newer technique of repairing hernia. The aim of this study is to compare the outcomes of totally extraperitoneal laparoscopic inguinal hernia repair versus Lichtenstein open repair in patients with inguinal hernia."n"nMethods: Among 50 patients, 25 cases underwent Lichtenstein procedure and 25 patients underwent TEP technique for repairing primary unilateral inguinal hernia. Findings during the operation have been recorded and the 12-months follow-up of patients in different views was performed through a questionnaire and then the results were compared."n"nResults: The operation duration, the rate of complications and frequency of recurrence were similar in two groups; but the hospital stay, postoperative pain, chronic groin pain and the required time to return to normal activity were significantly lower in patients who underwent the TEP method compared to the patients who underwent the Lichtenstein technique (p<0.001, p<0.001, p=0.012, p<0.001, respectively)."n"nConclusion: The TEP surgical technique can be recognized as a safe method with acceptable results for patients and has significant effects on improvement of patients' quality of life after hernia repair. Suitable results of this surgical method are achieved when the surgeon goes through the learning curve.
A scanning election microscopic study of the effect of primer on sealant penetration in saliva contaminated enamel
Pahlevan A,Nakhjavani Y,Tavassoli Hojati S
Journal of Dental Medicine , 2010,
Abstract:
Effect of municipal wastewater with manure and fertilizer on yield and quality characteristics of forage in corn
A Tavassoli, A Ghanbari, E Amiri, Y Paygozar
African Journal of Biotechnology , 2010,
Abstract: In order to study the effects of wastewater with two kinds of fertilizers (manure and chemical fertilizer) on yield and quality characteristics of forage in corn, a field experiment was conducted in the University of Zabol in Iran during 2007 growing season. The experiment was conducted in split plot design with three replications. The treatment were comprised of two levels of irrigation water (W1 = Well water and W2 = Wastewater) in the main plot and five levels of fertilizer (F1 = Control; F2 = Manure, 30 ton/ha; F3 = Manure, 15 ton/ha; F4 = NPK: 350, 200 and 100 kg/ha; and F5 = NPK: 175, 100 and 50 kg/ha) in the sub plot. Results showed that irrigation with wastewater significantly increases the fresh and dry forage yield of corn than well water. Treatment of treated wastewater also had a significant influence on crude protein content, ash percentage and macro elements (N, P and K) contents in corn forage (P < 5%). But wastewater had no significant effect on Fe, Mn and Zn elements content. The highest fresh and dry forage yield and the most crude protein content, ash percentage and macro elements (N, P and K) contents were obtained from F4 (NPK: 350, 200 and 100 kg/ha) treatment. However, the highest Fe, Mn and Zn elements content were obtained from F2 (Manure: 30 ton/ha) treatment.
Thoracoscopy for the diagnosis of hidden diaphragmatic injuries: penetrating thoraco-abdominal trauma
Bagheri R,Tavassoli A,Sadrizadh A,Rajabi Mashhadi M
Tehran University Medical Journal , 2008,
Abstract: "nBackground: Penetrating thoracoabdominal stab wounds may cause diaphragmatic and abdominal organ laceration. However, 15-20% of these cases who are stable and managed by conservative treatment might have hidden diaphragmatic injuries, which could ultimately lead to chronic diaphragmatic hernia. Therefore, a safe and exact diagnostic method for the detection of occult diaphragmatic injuries is very valuable. In this study we have assessed the diagnostic value of thoracoscopy in occult diaphragmatic injuries resulting from penetrating thoracoabdominal stab wounds. "nMethods: From March 2005 to October 2007, 30 hemodynamically stable patients with penetrating thoracoabdominal injuries, not requiring emergent exploration, were enrolled in this study. All subjects underwent thoracoscopy to evaluate probable diaphragmatic injury. Diaphragmatic injuries were repaired via thoracoscopy or laparatomy. All patients were evaluated for chronic diaphragmatic hernia by CT-scan six months later. "nResults: The mean patient age was 26.2 years, with a male/female ratio of 5:1. Using thoracoscopic exploration, we observed five (16.7%) hidden diaphragmatic injuries, three (9.9%) of which were repaired using the thoracoscopic approach and two (6.6%) by laparatomy. Lung parenchymal laceration was seen in two patients (6.6%), for whom the repair was performed using thoracoscopy. Intra-abdominal injury was seen in one patient (3.3%), which was repaired by laparatomy. After thoracoscopy, there were no complications or evidence of chronic diaphragmatic hernia in the chest and abdominal CT-scans performed six months later. Therefore, the diagnostic accuracy of thoracoscopy in occult diaphragmatic injuries in our study was 100%. "nConclusion: With its high degree of diagnostic accuracy, low degree of invasiveness, as well as its utility in treatment, we recommend thoracoscopy for all clinically stable patients with penetrating thoracoabdominal stab wounds.
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