در هنگام جستجو کلمه در قسمت عنوان میتوانید کلمات مورد جستجو را با کاراکتر (-) جدا کنید.
کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Challenges in Nano and Micro Scale Science and Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: nanoparticle,heat transfer,γ-Fe2O3,Maghemite,Headbox
- چکیده:
- چکیده انگلیسی: Nano-size maghemite (γ-Fe2O3) particles were prepared in one step using ultrasound radiation. The obtained nanoparticles were characterized by SEM, TEM , XRD, FTIR, and VSM. The results revealed that the synthesized nanoparticles were spherical, mono-dispersed and uniform. Furthermore, the crystalline structure of nanoparticles endorsed by X-ray diffraction study. The FTIR spectra have provided information on the structure of the surface of nanoparticles. TEM analysis showed that the average particle size of the γ -Fe2O3 are about 15 nm. The formed nanoparticles exhibited unique magnetic behavior with magnetic saturation values of~68 emu/g. By utilizing properties of synthetic γ -Fe2O3 nanoparticles, a three-dimensional incompressible nanofluid flow in a confined sinusoidal converging jet in turbulent flow regime was numerically investigated. Results were obtained for the flow structure at different Reynolds numbers for steady asymmetric jet development at various values of the duct-to-jet width ratio (aspect ratio),different amplitudes and different volume fractions of nanoparticles. The results showed that by increasing the Reynolds number, aspect ratio, amplitude and volume fraction of γ -Fe2O3 nanoparticles, the averaged Nusselt number will increase.
- انتشار مقاله: 01-11-1394
- نویسندگان: Mohammad Soleimani Lashkenari,Mazaher Rahimi-Esbo,Mohsen Ghorbani,Amin Taheri,Shokoofeh Ghasemi
- مشاهده
- جایگاه : پژوهشی
- مجله: Report of Health Care- (لغو رتبه)
- نوع مقاله: Journal Article
- کلمات کلیدی: Klebsiella pneumoniae,Drug resistance,ESBLs,Multiplex-PCR
- چکیده:
- چکیده انگلیسی: Introduction: One of the enzymes that is produced by Gram negative bacteria is Extended spectrum-β-lactamases (ESBLs) which was first described in the 1980s. This study aims at identifying three common genes (blaTEM, blaSHV and blaCTX-M) in Klebsiella pneumoniae isolated from patients in Arak, Iran. Methods: A total number of 112 isolates were selected during 2012-2013. To identify phenotypic specifications, Combination Disk Method based on CLSI guidelines. The ESBL’s genotype was analyzed by multiplex PCR and DNA sequencing. Results: Among 10 examined antibiotics, the most resistant and susceptible antibiotics were ampicillin and imipenem, respectively. The phenotypic determination of ESBL showed that 46.42% of isolates produced ESBL. The molecular survey of genes showed that 35.89% had CTX-M, 5.12% had both CTX-M and TEM and 2.56% had TEM, SHV, CTX-M. Conclusion: According to the findings, the high prevalence (73.07%) of ESBL producing K. pneumoniae was observed with a new pattern of blaCTX-M distribution differed from other countries.
- انتشار مقاله: 20-05-1394
- نویسندگان: Leila Hajiabadi,Mohammad Reza Zolfaghari,Mohammad Soleimani
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Structural Engineering and Geotechnics
- نوع مقاله: Journal Article
- کلمات کلیدی: Compressive strength,Lightweight Concrete,Pumice,RCPT,RCMT,Chlorine ion
- چکیده:
- چکیده انگلیسی: In this research, the effect of the cement, sand, and pumice mixture on the durability of lightweight concrete is investigated. The intention of this paper is to replace a certain amount of the pumice percentage as an alternative option of the cement and pumice sand aggregate with conventional sand components. The experimental results include compressive strength, ion-chloride emission factor (RCPT and RCMT). The experiments are carried out at the concrete age of 28 and 90 days. The results indicate that pumice composition improves the durability of lightweight concrete. Furthermore, it was observed that the proposed mixing design have proper permeability resistance against the chloride ion attack. For 90 days aged concrete, it was notified that the samples had a chlorine ion penetration coefficient of 10% which is less than the concrete specimens of 28 days. Finally, the compressive strength of the new mixing design samples can be increased by 1.5 to 2.5 Mpa after 90 days.
- انتشار مقاله: 23-07-1396
- نویسندگان: Amirmohammad Soleimani,Seyed Amir Hossein Hashemi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Water Quality,ARMA,Urmia Lake,Time Series Model,Carma
- چکیده:
- چکیده انگلیسی: Considering the complexity of hydrological processes, it seems that multivariate methods may enhance the accuracy of time series models and the results obtained from them by taking more influential factors into account. Indeed, the results of multivariate models can improve the results of description, modeling, and prediction of different parameters by involving other influential factors. In this study, univariate models (ARMA) and auto-correlated multivariate models with the simultaneous autoregressive moving average model (CARMA) were evaluated for modeling Electrical Conductivity and Total Dissolved Solid parameters of the western stations of Urmia Lake Basin. To use the CARMA models, annual flow rate time series, EC, TDS, SAR, and pH values measured across seventeen hydrometric stations between 1992 and 2013 were used. In the studied statistical period, the river flow in the west of Urmia Lake Basin decreased and experienced an incremental increase compared to the EC and TDS values in river flow. By applying influential parameters in CARMA models, the mean error value of the model in training and experimental stages reduces by 32% and 44% for EC values and 34% and 36% for TDS values, respectively.
- انتشار مقاله: 05-11-1395
- نویسندگان: Mohammad Soleimani,Keivan Khalili,Javad Behmanesh
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Advances in Environmental Health Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Water Quality,ARMA,Urmia Lake,Time Series Model,Carma
- چکیده:
- چکیده انگلیسی: Considering the complexity of hydrological processes, it seems that multivariate methods may enhance the accuracy of time series models and the results obtained from them by taking more influential factors into account. Indeed, the results of multivariate models can improve the results of description, modeling, and prediction of different parameters by involving other influential factors. In this study, univariate models (ARMA) and auto-correlated multivariate models with the simultaneous autoregressive moving average model (CARMA) were evaluated for modeling Electrical Conductivity and Total Dissolved Solid parameters of the western stations of Urmia Lake Basin. To use the CARMA models, annual flow rate time series, EC, TDS, SAR, and pH values measured across seventeen hydrometric stations between 1992 and 2013 were used. In the studied statistical period, the river flow in the west of Urmia Lake Basin decreased and experienced an incremental increase compared to the EC and TDS values in river flow. By applying influential parameters in CARMA models, the mean error value of the model in training and experimental stages reduces by 32% and 44% for EC values and 34% and 36% for TDS values, respectively.
- انتشار مقاله: 05-11-1395
- نویسندگان: Mohammad Soleimani,Keivan Khalili,Javad Behmanesh
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Veterinary Medicine
- نوع مقاله: Journal Article
- کلمات کلیدی: Q fever,Coxeilla brunetii,nested PCR
- چکیده: زمینه مطالعه: تب Q یک بیماری مشترک بین انسان و دام است که عامل آن، یک گونه از باکتری بنام Coxiella burnetii است که سراسر جهان در حال توزیع میباشد . در گاو، عفونت Coxiella burnetii معمولاً بدون علامت است اما همچنین میتواند با اختلالات تولید مثلی در ارتباط باشد. اپیدمیولوژی تب Q در ایران نا مشخص است اما برخی از منابع از اندمیک بودن ان در ایران خبر میدهند .هدف: هدف از این مطالعه به تشخیص مولکولی Coxiella burnetii، در مزارع گاو شیری با استفاده از واکنش زنجیره ای پلی مراز آشیانه ای در استان قم در سال 1390 می باشد.روش کار: از ژانویه تا فوریه 2011 (زمستان) و جولای تا سپتامبر 2011 (تابستان) در مجموع از 100 نمونه بالک شیر گاو از پنج منطقه به یک تعداد جمع آوری شدند .نتایج: در این پژوهش، 14(%14 از 100) شیر بالک مثبت بوده اند. نتیجه گیری نهایی:این نتایج فرضیه شیوع بالا و الگوی بومی تب Q در ایران را تایید مینماید.
- چکیده انگلیسی: BACKGROUND: Q fever is a zoonotic disease caused by
Coxiella burnetii, a species of bacteria that is distributed
worldwide. In cattle, Coxiella burnetii infections are generally
asymptomatic but can also be associated with reproductive
disorders. OBJECTIVES: The aim of this study was to achieve
molecular detection of Coxiella burnetii in dairy bovine milk
farms using Nested PCR in Qom province, Iran. METHODS:
From January to February 2011 (winter) and July to September
2011(summer) a total of 100 bovine bulk milk samples were
equally collected from five areas of Qom. The nested PCR assay
used to screen for C. burnetii was designed from the nucleotide
sequence of the com1 gene encodin a 27-kD outer membrane
protein (OMP). RESULTS: In this study, 14% (14 of 100) of bulk
milk were positive. CONCLUSIONS: These results support the
hypothesis of high prevalence and endemic pattern of Q fever in
Qom province of Iran.- انتشار مقاله: 20-10-1391
- نویسندگان: Arash Ghalyanchi Langeroudi,Narges Babkhani,Mohammad Reza Zolfaghari,Keivan Majidzadeh Arbadili,Abbas Morovvati,Mohammad Soleimani
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Neonatology
- نوع مقاله: Journal Article
- کلمات کلیدی: Cardiac Tamponade,Extremely low birth weight infant,Pericardial Effusion,PICC insertion
- چکیده:
- چکیده انگلیسی: Background: Pericardial effusion and cardiac tamponade are the rare complications of peripherally inserted central catheters (PICC insertion) in extreme low birth weight infants. In this regard, paying attention to these complications is of utmost importance, because they can result in infant death.
Case report: The case of our infant is a sample of these complications. On the 39th day of the birth of the infant, the muffled sounds of heart and pathological murmurs in heart auscultation raised the doubt of a problem in infant’s heart.
Conclusion: In this regard, echocardiography was performed. The report was massive pericardial effusion impending tamponade. After pericardiocentesis for saving infant’s life, diagnostic evaluations were performed, and PICC insertion was proved as the cause of these complications. Although these complications are usually diagnosed with symptoms like bradycardia, hypotension, and drop in saturation or cardiac arrest, the first step of diagnosis in our infant was abnormal heart examination. Therefore, it is essential that all neonatologists pay attention to heart examination of infants with PICC along with other symptoms such as bradycardia, hypotension, and drop in saturation or cardiac arrest to avoid occurring pericardial effusion and cardiac tamponade as rare complications of PICC insertion. They should consider pericardial effusion and cardiac tamponade as the fatal complications of PICC insertion in extremely low birth weight infants with PICC.- انتشار مقاله: 20-08-1397
- نویسندگان: Mohammad Soleimani,Zohreh Badiee,Razieh Goudarzi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Chemistry and Chemical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Nanocomposite,Silver,morphology,Polypyrrole,Antibacterial mechanism
- چکیده:
- چکیده انگلیسی: Polypyrrole/silver (PPy/Ag)nanocomposite was synthesized by a chemical oxidative method. SEM and TEM analyses were performed for studying the morphology of the nanocomposite. It was shown that the obtained nanocomposite particles have a spherical structure with the high surface area to volume ratio that is the important factor in the biological application. The particle sizes of the PPy/Ag were 15–25 nm obtained by TEM. The antibacterial property was assessed by the disk diffusion method against gram-negative Escherichia coli and gram-positive Staphylococcus aureus bacteria. The antibacterial mechanism of action for PPy/Ag nanocomposite was discussed. PPy/Ag showed antibacterial activity against S. aureus (5 ± 0.5 mm) and E. coli (8 ± 0.5 mm). Based on satisfactory antibacterial properties of PPy/Ag nanocomposite, it could be considered as a suitable material in biomedical applications.
- انتشار مقاله: 05-09-1396
- نویسندگان: Mohsen Ghorbani,Armin Ehsani,Mohammad Soleimani
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Chemistry and Chemical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: optimization,Prediction,Genetic Algorithm,Support vector machine,Second Virial Coefficient
- چکیده:
- چکیده انگلیسی: In this work, a Genetic Algorithm boosted Least Square Support Vector Machine model by a set of linear equations instead of a quadratic program, which is improved version of Support Vector Machine model, was used for estimation of 98 pure compounds second virial coefficient. Compounds were classified to the different groups. Finest parameters were obtained
by Genetic Algorithm method for training data. The accuracy of the Genetic Algorithm boosted Least Square Support Vector Machine was compared with four empirical equations that are well-known and are claimed can predict all compounds second virial coefficients (Pitzer, Tesonopolos, Gasanov RK and Long Meng). Results showed that in all classes of compounds, the Genetic Algorithm boosted Least Square Support Vector Machine method was more accurate than these empirical correlations. The Average Relative Deviation percentage of overall data set was 2.53 for the Genetic Algorithm boosted Least Square Support Vector Machine model while the best Average Relative Deviation percentage for empirical models (Tesonopolos) was 15.38. When the molecules become more complex, the difference in accuracy becomes sharper for empirical models where the proposed Genetic Algorithm boosted Least Square Support Vector Machine model have predicted good results for classes of compounds that empirical correlations usually fail to give good estimates.- انتشار مقاله: 15-06-1395
- نویسندگان: Mohammad Soleimani Lashkenar,Bahman Mehdizadeh,Kamyar Movagharnejad
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Molecular and Clinical Microbiology
- نوع مقاله: Journal Article
- کلمات کلیدی: MIC,Ketoconazole,Candida Clotrimazole,MFC,SDA medium
- چکیده:
- چکیده انگلیسی: The lack of variation in antifungal drugs, and the misuse or inappropriate use usually causes resistant strains of the yeast in human’s normal flora. Unfortunately, a large number of Candida infection cases in immunosuppressed patients with insufficient treatment eventually can cause patient's death. The aim of this study was to evaluate the in vitro conventional antifungal azole compounds with binary mixture with appropriate ratios by susceptibility test using the laboratory as a mixture of two in vitro conditions. In present study, 10 isolates of Candida were admitted from patients that were referred to mycology laboratory of Faghihi Hospital at Shiraz with signs of cutaneous and mucosal infections. In the present study we used the methods of the binary mixure of common antifungal drugs Clotrimazole, Ketoconazole and Miconazole on equally proportion have been used. The drugs were solved in various concentrations on the SDA medium and then Cndida isolates were cultured in the SDA plates. The minimum inhibitory concentration (MIC 90) and minimum fungicidal concentration (MFC) was determined. The results of this study suggest that a binary mixture of these drugs inhibited the growth of most strains of pathogenic Cndida isolates. The combination with Clotrimazole and ketoconazole in equal proportion had more effective than other drug mixtures against all isolates with the exception of isolate 3. In contrary, the combination of Miconazole and Clotrimazole had the least effect, and the MIC was calculated in the range of 3.12 to 50 μg/ml. Evaluation of MFC showed almost the same results. Lowest values of the MFC belonged to the combination of clotrimazole and ketoconazole which was obtained 6.25 μg/ml. It is concluded that the use of the combination of Clotrimazole and Ketoconazole in equal ratios has better antifungal effects against cutaneous and mucosal isolates of the Candida infection.
- انتشار مقاله: 10-04-1391
- نویسندگان: Mohammad Soleimanipour,Majid Shaabani,Mohsen Poornia,Ali Mohabat
- مشاهده