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Search Results: 1 - 10 of 543258 matches for " M. R. Bahremand "
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Effect of Sewage Sludge on Soil Physical Properties
M. R. Bahremand,M. Afyuni,M. A. Hajabbassi,Y. Rezaeinejad
Journal of Science and Technology of Agriculture and Natural Resources , 2003,
Abstract: A field experiment was conducted to investigate the effects of sewage sludge and of time lapse after sludge application on soil physical properties. Four sewage sludge treatments (0, 25, 50, and 100 ton/ha) in a complete randomized block design with three replications were applied and mixed to a depth of 20 cm. Wheat was planted and soil physical properties were measured 23, 85, 148, and 221 days after sewage sludge application. Sewage sludge application significantly increased MWD, hydraulic conductivity, final infiltration rate, moisture percentage at 1/3 and 15 bars, and plant available soil moisture, while it significantly decreased soil bulk density. In general, the best results obtained with the 100 ton/ha sewage sludge treatment. Time lapse after sewage sludge application caused soil physical properties to approach the values of the control. However, even 221 days after sludge application, the 50 and 100 ton/ha treatments had significantly different values compared with the control treatment. The results in this research show that sewage sludge can help to improve soil physical conditions and this effect persists over long periods. This effect is specially important with plant available soil moisture and infiltration.
Determination of linear regression model to estimate the water requirements of sheep (case study : Pastures of northern Golestan province).
M. Daneshi,H. Barani,H.R.Rezaei,A.Bahremand
Journal of Livestock Science , 2012,
Abstract: In areas where water is a scarce commodity, a strategy to determine water requirement of sheep to supply the amount of water, especially in droughts, are needed. The purpose of this paper is to offering a model to determine water requirement of sheep in winter pastures. This study was conducted in four commercial ocks of sheep in winter pastures of north of Golestan province (Gomishan and Aq-Qala) during the grazing season at December 2010 to April 2011. Among factors affecting on water requirement of sheep, the factors of ambient temperature, rainfall, wind speed, relative humidity, forage moisture and level of activity of sheep has been studied. Stepwise regression analysis is used to determine the factors that have most influence on water consumption of sheep during the grazing. Variables of Ambient temperature (t = 12.532, p < 0.01), forage moisture (t = - 6.124, p < 0.01) and rainfall (t =4.011, p < 0.01), respectively, were selected in Stepwise regression analysis. A linear formula (r2= 0.87, p < 0.01) to determine the water requirement of sheep is obtained from this study.
Endoscopic findings in children with Helicobacter pylori infection and abdominal tenderness
Zamani A,Bahremand Sh,Ojaghi Haghighi S M,Daneshjou K
Tehran University Medical Journal , 2008,
Abstract: Background: Helicobacter pylori (Hp) infection often occurs in childhood and adolescence, with the frequency increasing with age. Hp infection is associated with insufficient hygiene, overcrowding and low socioeconomic status. Although declining in developed countries, children in the developing countries continue to have a high prevalence of Hp infection. As the association of Hp infection with chronic abdominal pain is not ubiquitously accepted, in this study we investigate the significance of endoscopic finding associated with Hp infection in children with abdominal tenderness.Methods: This cross-sectional study included 1,665 healthy children, aged 6 to 12 years, in whom Hp infection was evaluated using the IgG anti-H. pylori test. Hp-positive children with epigastric tenderness underwent upper gastrointestinal (GI) endoscopy. Urease activity of gastric mucosal biopsies was measured. The presence and density of Hp organisms, the presence of follicular gastritis, and the nature of inflammation and gastritis activity were assessed by histologic examination.Results: Of 1665 children, 429 (26%) subjects (51% girls, 49% boys) were seropositive for H. pylori. There was a significant association between Hp infection and older age (p<0.001) and male/female ratio (p<0.05). Epigastric tenderness was detected in 39 children (1%), 29 of whom underwent upper GI endoscopy. Nodular gastritis with antral erythema was the most common endoscopic finding (26/29; 89.7%). Histological findings revealed that, in all cases with endoscopic nodularity, lymphoid follicles were present. Bacterial density was low in 13 (44.8%), moderate in 14 (48.2%) and high in 2 (7%) subjects.Conclusion: The findings of the present study demonstrated that antral nodularity is the most common feature in children with Hp infection and epigastric tenderness was significantly associated with histological findings of lymphoid follicles.
The relationship between Helicobacter pylori and lymphonodular hyperplasia of the stomach in children
Mir Salehian A,Bahremand S,Jamali M,Shahdi A
Tehran University Medical Journal , 1994,
Abstract: Association of Helicobacter pylori with pathogenesis of gastrointestinal disorders (including gastritis in children with special endoscopic anteronodular) have significant importance in prognosis of infection resulting from this bacteria in children. However, in this research it was found that there is significant and clear correlation between nodular anteritis (in endoscopy) and active presence of lymphoid follicle (in histology findings with replacement of H.pylori) was noticed in children. In this research 14 persons (34.1%) out of total patients were positive. The average age of positive H.pylori patients was clearly higher than negative H.pylori patients. So increase of possible infection occurrence together with increase of age in children was confirmed. Meanwhile, there is significant relationship between presence of bacteria and clinical symptoms particularly epigastric pain, vomiting, and nausea. One of the other results of this study was confirming the relationship between history of gastrointestinal disorders in immediate family members and infection resulting from H.pylori in patients.
H. Moayeri S. H. Bahremand
Acta Medica Iranica , 2005,
Abstract: Celiac disease (CD) has been reported in association with genetic disorders such as Down’s syndrome and Turner’s syndrome (TS). This study was undertaken to assess the prevalence of CD among a group of patients with TS. Forty eight girls with TS and a control group composed of 48 healthy girls were screened for CD by IgA antiendomysial antibody (IgA-EMA). Total IgA of serum was measured in all of the patients and controls and EMA was measured in subjects who had normal range of IgA. Endoscopy and biopsy of duodenum was performed for EMA positive patients and pathologic evaluation was done according to Marsh’s classification. Total IgA of serum in all of the subjects was in normal range. Two subjects, both with TS, were EMA positive, resulting in a prevalence of 4.1% for CD in TS. Duodenal biopsy was performed in these patients and histologic changes of samples were classified as grade II in one and grade III b in another one. Results of this study are compatible with previous observations placing girls with TS at higher risk for CD relative to general population and justifying screening of CD in patients with TS.
Diagnosis of mycobacterium tuberculosis by PCR technique
Rivandi S,Bahremand A,Zinali S
Tehran University Medical Journal , 1998,
Abstract: In the present research work, a specific 285 bp DNA fragment was used for detection of Mycobacterium Tuberculosis complex. 100 samples were chosen randomly from sputum specimens that were negative with conventional methods (direct smear, culture, and radiometry), and examined by PCR; 7 cases of them were positive. Also, 20 sputum specimens were obtained from suspected patients to tuberculosis, and examined by three methods (culture, radiometry and PCR). The sensitivity of PCR compared with culture and radiometry was 100%, the specificity of PCR compared with culture was 91.66%, and compared with radiometry was 68.75%. Therefore, results of PCR revealed, this method is more sensitive, specific and rapid and it can detect ycobacterial infectious agents within one day period.
Prevalence of hyperuricemia in children with leukemia and lymphoma with respect to prophylactic treatment
Oloomi Z,Moayeri H,Bahremand Sh,Vafaei P
Tehran University Medical Journal , 2007,
Abstract: Background: Hyperuricemia is one of the oncologic emergency that occurs most often in patients with hematologic disorders particularly leukemia and high-grade lymphoma. This study was conducted in order to determine the prevalence of hyperuricemia with respect to prophylactic treatment (in particular allopurinol) in patients with lymphoproliferative disease in the pediatric hematologic ward of Imam Khomeini Hospital, Tehran. Methods: In this retrospective cross-sectional study, 316 children (75 females, 241 males) under the age of 12 years participated. Among the subjects, 66 patients (20.9%) had lymphoma and 250 patients (79.1%) had leukemia. Results: Of the 56 (17.7%) patients diagnosed with hyperuricemia, 13 with lymphoma (19.7%) and 43 (17.2%) with acute lymphoblastic leukemia, 52 patients showed hyperuricemia after induction of chemotherapy (p<0.001). Hyperuricemia was more prevalent in patients with more advanced disease (50.9% in stage IV, p<0.001). Hyperuricemia was more frequent in male patients (p<0.001). Among the 217 patients who had received prophylaxis (hydration, alkalization, allopurinol), 19 (8.7%) subjects had hyperuricemia compare to 37.3% in the group of patients who did not receive prophylactic treatment (p<0.001). Conclusion: From the literature reviewed, a recombinant form of the urate oxidase enzyme (rasburicase) is a safe and effective alternative to allopurinol to rapidly control plasma uric acid concentrations in patients with hematologic malignancy at high risk for tumor lysis during induction of chemotherapy. In this respect, we recommend a prospective study to compare allopurinol and rasburicase in children with leukemia and lymphoma.
Relationship Between Helicobacter Pylori Infection and Serum Ferritin Level in Primary School Children in Tehran-Iran
Ali Zamani,Mamak Shariat,Zohreh Oloomi Yazdi,Shahla Bahremand
Acta Medica Iranica , 2011,
Abstract: Iron deficiency can cause cognitive and functional learning disorders in children. Some studies have reported a relationship between low serum ferritin levels in patients with anemia and Helicobacter pylori (H. pylori) infection. Therefore, we aimed to determine the relationship between these two common diseases. This descriptive analytical cross-sectional study was performed to assess serum ferritin levels and H. pylori antibody titers (IgG) among 6-12 year old healthy primary school children in Tehran during the academic year 2005-2006. Specimen collection was done by cluster and randomization methods (multistage sampling). Personal information and laboratory results were compiled in questionnaires and data were analyzed by descriptive and analytical statistics via SPSS software. 165 primary school children (43% boys, 57% girls) with mean age 9.2 ± 1.5 years were enrolled in the study. H. pylori IgG antibody titer was positive in 26% of cases with mean values of 0.79 ± 0.42 units in boys and 0.75 ± 0.39 units in girls, which showed a significant statistical difference (P=0.004). H. pylori infection was more common among children of large families or those with low economic status (P=0.002). 29% of children had low serum ferritin levels. Out of the children with low serum ferritin levels, 71% and 28% had negative and positive anti H. pylori antibody titers (IgG levels), respectively. Also, 296 children (25%) with normal ferritin levels had H. pylori infection. We did not find a significant relationship between H. pylori infection and low serum ferritin levels or iron deficiency anemia.
Molecular Detection and Association of QnrA, QnrB, QnrS and BlaCMY Resistance Genes among Clinical Isolates of Salmonella spp. in Iran  [PDF]
Raheleh Saboohi, Bahareh Rajaei, Nahid Sepehri Rad, Mohamad Reza Razavi, Mohammad Reza Aghasadeghi, Arfa Moshiri, Ahmad Reza Bahremand, Keivan Kave, Peiman Kave, Mehrangiz Zangeneh, Mohammad Rahbar, Sara Khorami Sarvestani, Seyed Davar Siadat
Advances in Microbiology (AiM) , 2014, DOI: 10.4236/aim.2014.41010

Prevalence of three plasmid-mediated quinolone resistance determinant qnrA, qnrB, qnrS and extended spectrum Cephalosporins determinant blaCMY, among eighty-five isolates of Salmonella spp. collected in the community between 2008 and 2010 was determined by PCR. Not only qnr genes but also bla genes were positive in twenty-four different isolates. PCR assay detected that 22 of 85 (25.8%) Salmonella spp. carried the qnrA, 1 (1.17%) of 85 isolates harbored the qnrB, 1 (1.17%) of them contained the qnrS, 1 (1.17%) isolate carried all the three qnrA, qnrB, qnrS

Minima Domain Intervals and the S-Convexity, as well as the Convexity, Phenomenon  [PDF]
I. M. R. Pinheiro
Advances in Pure Mathematics (APM) , 2012, DOI: 10.4236/apm.2012.26069
Abstract: In this paper, we propose a refinement in the analytical definition of the s2-convex classes of functions aiming to progress further in the direction of including s2-convexity properly in the body of Real Analysis.
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