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Articles by A. Ghasemi
Total Records ( 5 ) for A. Ghasemi
  M. Kalantar Zadeh , G.H. Shahidi Bonjar , P. Rashid Farrokhi , A. Ghasemi , S. Aghighi and M.J. Mahdavi
  Streptomyces scabies and S. acidiscabies, the two major phytopathogens induce potato common scab in potato growing areas of Iran. Soil Actinomycetes including 174 isolates were assayed for assessing antagonistic activity against Streptomyces scabies and S. acidiscabies. From tested isolates, S. olivaceus, strain 115 and S. plicatus, strain 101 showed high anti-scab activity revealed by bioassays in agar disk and well diffusion methods. For further biological characterizations, the active strains were grown in submerged cultures to determine growth curve and prepare crude extracts. Preliminary greenhouse studies indicated that amending soil with the S. olivaceus, strain 115 and S. plicatus strain 101 reduce crop losses due to the pathogens. Antibacterial activities of both antagonists were of bactericidal type on both pathogens with complete inhibitory effects.
  N. Sadeghifard , M.M. Aslani and A. Ghasemi
  The aim of the present study was to compare four laboratory methods for diagnosis of Helicobacter pylori. 101 sets of four antral biopsies were collected from 101 patients, one of the biopsies in each set were tested by rapid urease test, other three biopsies were used for culture, direct staining and histopathology, respectively. By culture method in 62 cases (61.3%), Helicobacter pylori were isolated. Among several primary media that tested in this study, Brucella agar supplemented with 10% whole sheep blood supported relatively good growth of H. pylori. In present study 65 cases (64.3%) were positive by rapid urease test. Of 101 biopsy specimens in 68 cases (67.3%) were obtained positive result by histopathology method (Gimsa Staining). Sensitivity and specificity of direct staining test were 89.7 and 96.9%, respectively. We found histopathology method was the best method for diagnosis of H. pylori and it can be selected as gold standard in detection of Helicobacter pylori.
  M.H. Shirazi , N. Sadeghifard , R. Ranjbar , E. Daneshyar and A. Ghasemi
  Incidence of asymptomatic bacteriuria during pregnancy among Iranian women was examined. Midstream urine was collected from 380 pregnant women and streaked on blood agar and incubated for 24 to 48 h. Growth was considered significant if 105 mL-1 bacteria were present. Among the pregnant women, 10.1% had asymptomatic bacteriuria. Age, past history of abortion, proteinuria, level of education, number of fertility had no significant association with asymptomatic bacteriuria occurrence. But lower socioeconomic status, leucocytosis and a history of UTI were associated with an increased incidence of asymptomatic bacteriuria (p<0.05). The most frequently isolated pathogen was Escherichia coli (68.4%), followed by Staphylococcus epidermidis (10.5%)) and Klebsiella pneumonia (8.3%). According to the results, co-trimoxazole was the best antibiotic; followed by nitrofurantoin which 60.5 and 44.7% of strains were sensitive to these two antibiotics, respectively.
  R. Aminian , S.H. Naderi , S. Shahabi and A. Ghasemi
  Abrasion is an important possible side-effect of individually used mechanical oral hygiene products which encouraged researchers to investigate products with less potential complications. This study examined brushing abrasion of 4 standard toothbrushes (Soft Oral-B, Medium Oral-B, Soft Panbeh-Riz and Medium Panbeh-Riz) in vitro. A specific mold was used to make samples by setting composite on acrylic resin. The samples were subjected to a 200 g force applied by toothbrushes connected to V8 Cross Brushing Machine for 18000 cycles in the solution of toothpaste with fluoride and distilled water. The samples were scaled before and after experiment and their weight loss measured after 3000, 6000, 9000, 12000, 15000 and 18000 cycles. Two way ANOVA and Tukey tests were used for statistical analysis. The study showed Soft Oral-B (Advantage) to produce the least abrasion among the four toothbrushes. Soft Panbeh-Riz had the most abrasion. Medium Panbeh-Riz and Medium Oral-B (Indicator) showed similar abrasion rate. The results showed that abrasion effects existed in all toothbrushes while it was increased with the increase occurred in number of cycles showing linear pattern.
  R. Aminian , S.H. Naderi , S. Shahabi and A. Ghasemi
  Abrasion is an important possible side-effect of individually used mechanical oral hygiene products which encouraged researchers to investigate products with less potential complications. This study examined brushing abrasion of 4 standard toothbrushes (Soft Oral-B, Medium Oral-B, Soft Panbeh-Riz and Medium Panbeh-Riz) in vitro. A specific mold was used to make samples by setting composite on acrylic resin. The samples were subjected to a 200 g force applied by toothbrushes connected to V8 Cross Brushing Machine for 18000 cycles in the solution of toothpaste with fluoride and distilled water. The samples were scaled before and after experiment and their weight loss measured after 3000, 6000, 9000, 12000, 15000 and 18000 cycles. Two way ANOVA and Tukey tests were used for statistical analysis. The study showed Soft Oral-B (Advantage) to produce the least abrasion among the four toothbrushes. Soft Panbeh-Riz had the most abrasion. Medium Panbeh-Riz and Medium Oral-B (Indicator) showed similar abrasion rate. The results showed that abrasion effects existed in all toothbrushes while it was increased with the increase occurred in number of cycles showing linear pattern.
 
 
 
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