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Abstract
Stress is the body's reaction to any kind of changes that requires a physical, mental or emotional adjustment. The objective of this study is to visualize and analyze the most common stress factors among medicine students in Iran.A cross-sectional study was conducted among 3,337 medicine students in Iran. A questionnaire was used to gather the data.Findings indicated that there was a significant relationship among instructor/student interaction (p = 0.05), intern/externship (p = 0.000), self-efficacy factor (p = 0.05) and classmate pressure (p = 0.007) with respect to the year of admittance. The study further revealed that there was no significant correlation between academic theories, staff/management and admittance year factor. The most common stress factors among extern/intern group were the lack of educational disciplines in hospitals and related wards.
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Affiliation(s)
- M. Habibi
- Department of Statistics, University of Mazandaran, Babolsar, Iran
| | - A. Asgharzadeh
- Department of Statistics, University of Mazandaran, Babolsar, Iran
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Rezvani Borujeni S, Khavazi K, Asgharzadeh A, Rezvani Borujeni I. Use of bacterial acc deaminase to increase oil (especially poly aromatic hydrocarbons) phytoremediation efficiency for maize (zea mays) seedlings. Int J Phytoremediation 2018; 20:476-482. [PMID: 29053348 DOI: 10.1080/15226514.2017.1374330] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Oil presence in soil, as a stressor, reduces phytoremediation efficiency through an increase in the plant stress ethylene. Bacterial 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase, as a plant stress ethylene reducer, was employed to increase oil phytoremediation efficiency. For this purpose, the ability of ACC deaminase-producing Pseudomonas strains to grow in oil-polluted culture media and withstand various concentrations of oil and also their ability to reduce plant stress ethylene and enhance some growth characteristics of maize and finally their effects on increasing phytoremediation efficiency of poly aromatic hydrocarbons (PAHs) in soil were investigated. Based on the results, of tested strains just P9 and P12 were able to perform oil degradation. Increasing oil concentration from 0 to 10% augmented these two strains population, 15.7% and 12.9%, respectively. The maximum increase in maize growth was observed in presence of P12 strain. Results of high-performance liquid chromatography (HPLC) revealed that PAHs phytoremediation efficiency was higher for inoculated seeds than uninoculated. The highest plant growth and PAHs removal percentage (74.9%) from oil-polluted soil was observed in maize inoculated with P12. These results indicate the significance of ACC deaminase producing bacteria in alleviation of plant stress ethylene in oil-polluted soils and increasing phytoremediation efficiency of such soils.
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Affiliation(s)
- Samira Rezvani Borujeni
- a Department of Soil Science , Islamic Azad University, Science and Research Branch , Tehran , Iran
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Fallah A, Asgharzadeh A, MirMostafaee S. On the Lindley Record Values and Associated Inference. JSTA 2018. [DOI: 10.2991/jsta.2018.4.17.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Affiliation(s)
- R. Valiollahi
- Department of Mathematic, Statistics and Computer Science, Semnan University, Semnan, Iran
| | - A. Asgharzadeh
- Department of Statistics, Faculty of Mathematical Sciences, University of Mazandaran, Babolsar, Iran
| | - M. Z. Raqab
- Department of Statistics and OR, Kuwait University, Safat, Kuwait
- King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Mathematics, The University of Jordan, Amman, Jordan
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Affiliation(s)
- T. Kayal
- Department of Mathematics, Indian Institute of Technology Patna, Bihar, India
| | | | - M. K. Rastogi
- National Institute of Pharmaceutical Education and Research, Hajipur, Bihar, India
| | - A. Asgharzadeh
- Department of Statistics, University of Mazandaran, Babolsar, Iran
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Valiollahi R, Asgharzadeh A, Kundu D. Prediction of future failures for generalized exponential distribution under Type-I or Type-II hybrid censoring. BRAZ J PROBAB STAT 2017. [DOI: 10.1214/15-bjps302] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Affiliation(s)
- A. Asgharzadeh
- Department of Statistics, University of Mazandaran, Babolsar, Iran
| | - Hassan S. Bakouch
- Department of Mathematics, Faculty of Science, Tanta University, Tanta, Egypt
| | - M. Habibi
- Department of Statistics, University of Mazandaran, Babolsar, Iran
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Rostamikia Y, Tabari Kouchaksaraei M, Asgharzadeh A, Rahmani A. The Effect of Plant Growth-Promoting Rhizobacteria on Growth and Physiological Characteristics of Corylus avellana Seedlings. Ecopersia 2016. [DOI: 10.18869/modares.ecopersia.4.3.1471] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Mardani-Talaee M, Nouri-Ganblani G, Razmjou J, Hassanpour M, Naseri B, Asgharzadeh A. Effects of Chemical, Organic and Bio-Fertilizers on Some Secondary Metabolites in the Leaves of Bell Pepper ( Capsicum annuum ) and Their Impact on Life Table Parameters of Myzus persicae (Hemiptera: Aphididae). J Econ Entomol 2016; 109:1231-1240. [PMID: 27106230 DOI: 10.1093/jee/tov389] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2009] [Accepted: 12/04/2015] [Indexed: 06/05/2023]
Abstract
The green peach aphid, Myzus persicae (Sulzer), is a polyphagous and a holocyclic aphid that causes severe damage on hundreds of host plants in both fields and greenhouses. In this research, the effects of Zinc sulfate spray and amending the soil with 30% vermicompost, Bacillus subtilis , Pseudomonas fluorescens , Glomus intraradices , G. intraradices × B. subtilis , and G. intraradices × P. fluorescens compared with no fertilizer treatments were investigated on secondary metabolites in the leaves of bell pepper and life table parameters of M. persicae . Total phenol contents in the plant leaves varied significantly among different fertilizer treatments. The highest (72.28 mg/ml) value was observed on 30% vermicompost. Life table parameters of M. persicae were significantly affected by different fertilizer treatments. The net reproductive rate ( R 0 ) of M. persicae fed on plants treated with different fertilizer treatments varied from 4.38 to 21.93 female offspring, with the lowest and highest values on 30% vermicompost and Zinc sulfate, respectively. The lowest and the highest intrinsic rate of increase ( r m ) were also observed on 30% vermicompost and Zinc sulfate (0.111 and 0.321 female per female per day, respectively). The longest mean generation time ( T ) was recorded on 30% vermicompost (13.41 d), and the shortest generation time was observed on Zinc sulfate (9.61 d). Results of this study revealed that amending the soil with 30% vermicompost significantly affected the life table parameters of M. persicae . Thus, it was concluded that amending the soil of bell pepper with 30% vermicompost can provide an environmentally safe and efficient control of this aphid.
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MirMostafaee SMTK, Amini M, Asgharzadeh A. Bayesian prediction of minimal repair times of a series system based on hybrid censored sample of components’ lifetimes under Rayleigh distribution. COMMUN STAT-THEOR M 2016. [DOI: 10.1080/03610926.2015.1030418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- S. M. T. K. MirMostafaee
- Department of Statistics, Faculty of Mathematical Sciences, University of Mazandaran, Babolsar, Iran
| | - Morteza Amini
- Department of Statistics, School of Mathematics, Statistics and Computer Sciences, College of Science, University of Tehran, Tehran, Iran
| | - A. Asgharzadeh
- Department of Statistics, Faculty of Mathematical Sciences, University of Mazandaran, Babolsar, Iran
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Affiliation(s)
- A. Asgharzadeh
- Department of Statistics, University of Mazandaran, Babolsar, Iran
| | - R. Valiollahi
- Department of Statistics, University of Semnan, Semnan, Iran
| | - M. Z. Raqab
- Department of Mathematics, University of Jordan, Amman, Jordan
- Department of Statistics and OR, Kuwait University, Safat, Kuwait
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Mazinani Z, Asgharzadeh A. Genetic diversity of Azotobacter strains isolated from soils by amplified ribosomal DNA restriction analysis. CYTOL GENET+ 2014. [DOI: 10.3103/s0095452714050041] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mazinani Z, Asgharzadeh A. Genetic diversity of Azotobacter strains isolated from soils by amplified ribosomal DNA restriction analysis. Tsitol Genet 2014; 48:26-35. [PMID: 25318174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Strains of Azotobacter mediate in the nitrogen fixation process by reducing of N2 to ammonia. In this study, 50 strains were isolated from different rhizospheric soil in central Iran, by using soil paste-plate method. These strains were biochemically identified and characterized on differential LG medium based on morphological and physiological properties. Results obtained showed that identified strains were belonging to three species, namely A. chroococcum, A. vinelandii and A. beijernckii. In order to molecular analysis, the 16S rRNA gene was amplified using 27f and 1495r primers and PCR products were subsequently digested with RsaI, HpaII and HhaI. Cluster analysis based on amplified ribosomal DNA restriction analysis were revealed intraspecific polymorphism and differentiated strains into two mains clusters, clusters A and B. Cluster A strains were related to the A. vinelandii, whereas cluster B strains were related to the A. chroococcum and A. beijerinckii. The results show that amplified ribosomal DNA restriction analysis is a powerful and discriminatory tool for the identification of members of the genus Azotobacter.
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Asgharzadeh A, Ahmadi J, Mirzazadeh Ganji Z, Valiollahi R. Reconstruction of the past failure times for the proportional reversed hazard rate model. J STAT COMPUT SIM 2012. [DOI: 10.1080/00949655.2010.542550] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Asgharzadeh A, Esmaily L, Nadarajah S. Approximate MLEs for the location and scale parameters of the skew logistic distribution. Stat Pap (Berl) 2012. [DOI: 10.1007/s00362-012-0436-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Siavoshi F, Asgharzadeh A, Ghadiri H, Massarrat S, Latifi-Navid S, Zamani M. Helicobacter pylori genotypes and types of gastritis in first-degree relatives of gastric cancer patients. Int J Med Microbiol 2011; 301:506-12. [PMID: 21641279 DOI: 10.1016/j.ijmm.2011.03.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Revised: 03/27/2011] [Accepted: 03/27/2011] [Indexed: 12/17/2022] Open
Abstract
The frequency of Helicobacter pylori vacA alleles, cagA, and jhp0947 and their association with types and advanced forms of gastritis in 143 first-degree relatives of gastric cancer (GC) patients was assessed. The subjects included 64/143 with antral-predominant gastritis, 68/143 with pangastritis, and 11/143 with corpus-predominant gastritis, with or without atrophy or intestinal metaplasia (IM). Further classification included the severity of atrophy or IM. Group I (40/143) included the subjects with moderate-marked atrophy or IM, group II (58/143) those with no atrophy or IM, and group III (45/143) with mild atrophy or IM. The frequency of vacA s1 was 79.7%, vacA s2 20.3%, m1 49.7%, m2 50.3%, cagA 76.2%, and jhp0947 58%. The most prevalent combination was vacAs1 cagA (+) (65.7%) (P=0.001). Of the 143 subjects, 85 (59.4%) showed atrophy or IM, and 40/85 (47%) developed the moderate-marked atrophy or IM. No significant correlation was found between genotypes and the types of gastritis, non-atrophy, atrophy, or IM and severe forms of atrophy or IM (P>0.05). It is proposed that H. pylori genotype status might not be considered as an important determinant of the types and advanced forms of gastritis in the first-degree relatives of GC patients.
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Affiliation(s)
- F Siavoshi
- Dept. of Microbiology, Faculty of Sciences, University of Tehran, Enghelab Ave., Tehran 141556455, Iran.
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Tavasolee A, Aliasgharzad N, Salehi GR, Mardi M, Asgharzadeh A, Akbarivala S. Effects of Co-Inoculation with Arbuscular Mycorrhizal Fungi and Rhizobia on Fungal Occupancy in Chickpea Root and Nodule Determined by Real-Time PCR. Curr Microbiol 2011; 63:107-14. [DOI: 10.1007/s00284-011-9951-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Accepted: 04/18/2011] [Indexed: 10/18/2022]
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Asgharzadeh A, Abdi M. Confidence Intervals and Joint Confidence Regions for the Two-Parameter Exponential Distribution based on Records. Communications for Statistical Applications and Methods 2011. [DOI: 10.5351/ckss.2011.18.1.103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Affiliation(s)
- A. Asgharzadeh
- a Department of Statistics , University of Mazandaran , Babolsar, Iran
| | - A. Fallah
- b Department of Statistics , University of Payam Noor , Behshahr, Iran
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Asgharzadeh A, Valiollahi R. Prediction Intervals for Proportional Hazard Rate Models Based on Progressively Type II Censored Samples. Communications for Statistical Applications and Methods 2010. [DOI: 10.5351/ckss.2010.17.1.099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rokni Zadeh H, Khavazi K, Asgharzadeh A, Hosseini-Mazinani M, De Mot R. Biocontrol of Pseudomonas savastanoi, causative agent of olive knot disease: antagonistic potential of non-pathogenic rhizosphere isolates of fluorescent Pseudomonas. Commun Agric Appl Biol Sci 2008; 73:199-203. [PMID: 18831274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- H Rokni Zadeh
- Center of Microbial and Plant Genetics, Katholieke Universiteit Leuven, Heverlee, Belgium
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Rezaeian R, Asgharzadeh A. Bayes and Empirical Bayes Estimation of the Scale Parameter of the Gamma Distribution under Balanced Loss Functions. Communications for Statistical Applications and Methods 2007. [DOI: 10.5351/ckss.2007.14.1.071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Feizabadi MM, Maleknejad P, Asgharzadeh A, Asadi S, Shokrzadeh L, Sayadi S. Prevalence of aminoglycoside-modifying enzymes genes among isolates of Enterococcus faecalis and Enterococcus faecium in Iran. Microb Drug Resist 2007; 12:265-8. [PMID: 17227212 DOI: 10.1089/mdr.2006.12.265] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Disks containing 120 microg of gentamicin were used to detect high-level gentamicin-resistant phenotype (HLGR) among isolates of Enterococcus faecalis (n = 79) and E. faecium (n = 35). These isolates were collected from three hospitals in Tehran during 2002-2004. The macrobroth dilution assay was then used to determine the minimum inhibitory concentration (MIC) of gentamicin. The susceptibility of isolates against amikacin, netilmicin, tobramycin, and kanamycin were also determined by Kirby-Bauer method. All isolates were subjected to polymerase chain reaction (PCR) assays targeting aminoglycoside modifying enzyme (AMEs) genes including aac(6 ')-aph(2 "), aph(2 ")-Ib, aph(2 ")-Ic, aph(2 ")-Ia, aph(2 ")-Id, aph(3 ')-IIIa, and ant(4 ')-Ia. Fifty-nine isolates (52%) showed HLGR phenotype. All isolates with HLGR phenotype and those showing 64 < MIC < 500 microg/ml contained aac(6 ')-aph(2 "). The aph(3 ')-IIIa was found in 61% of the isolates with HLGR phenotypes and in 65% of isolates with MIC < 500. Coexistence of aac(6 ')-aph(2 ") and aph(3 ')-IIIa gene among HLGR isolates of E. faecalis and E. faecium were 60% and 65%, respectively. The gene aph(2 ")-Ic was amplified in two isolates of E. faecium. The results of PCR for aph(2 ")-Id, ant(4 ')-Ia and aph(2 ")-Ib genes were negative. The aac(6 ')-aph(2 ") was the most frequent gene encoding resistance to gentamicin and other aminoglycosides followed by aph(3 ')-IIIa. Isolates lacking these genes were susceptible to all aminoglyocosides tested in this study.
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Affiliation(s)
- Mohammad Mehdi Feizabadi
- Department of Microbiology, Faculty of Medicine, Tehran University of Medical Science, Tehran, Iran.
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Affiliation(s)
- A. Asgharzadeh
- a Department of Statistics, Faculty of Basic Science , University of Mazandaran , Babolsar , Iran
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Feizabadi MM, Aliahmadi A, Mobasheri F, Asgharzadeh A, Asadi S, Etemadi G. Phenotypic characteristics and population genetics ofEnterococcus faecaliscultured from patients in Tehran during 2000–2001. Can J Microbiol 2003; 49:645-9. [PMID: 14663499 DOI: 10.1139/w03-082] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Conventional bacteriology techniques were used to identify enterococci isolates cultured from patients at different hospitals in Tehran during 2000–2001. The identification was confirmed using species-specific PCR targeting the D-alanyl-D-alanine ligase gene. A total of 59 isolates of Enterococcus faecalis were identified. The rates of resistance to different antibiotics were in the following order: penicillin 84%, ciprofloxacin 42%, high-level gentamicin 30%, nitrofurantoin 14%, imipenem 4%, and chloramphenicol 2%. Resistance to ampicillin was found to be rare among the Iranian isolates of E. faecalis. Multi-locus enzyme electrophoresis was then used to analyze the strains. Forty-five electrophoretic types were obtained when 10 enzyme loci were screened. Although the collection of bacterial isolates was limited in time and location, considerable heterogeneity was found. Analysis of strains for linkage disequilibrium demonstrated that the studied population is not clonal, since the index of association was not significantly different from zero (Ia= 0.0296). Enterococcus faecalis isolates recovered from patients in Tehran were genetically diverse and seemed to possess a high potential for genetic recombinations, though none were resistant to vancomycin.Key words: Enterococcus faecalis, population genetics, MEE analysis, nosocomial infections.
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Farsipour N, Asgharzadeh A. Estimation of the Parameter of a Bernoulli Distribution Using a Balanced Loss Function. Communications for Statistical Applications and Methods 2002. [DOI: 10.5351/ckss.2002.9.3.889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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