میرعلی محمدی
عضو هیأت علمی دانشگاه ارومیه
[ 1 ] - بررسی پارامتر های معیار شکستِ رامامورتی و هوک و همکارانِ سنگ آهک یکپارچه تا به شدت درزه دار فاقد مواد پرکننده و دارای سطوح صاف
سنگ آهک یکی از سنگ‌های رسوبی است که به وفور در پوسته زمین وجود دارد و مهندسین برای حفر سازه‌ها به‌عناوین مختلف به کرات با این سنگ روبرو می‌شوند. در این تحقیق به شیوه‌ای نو، تأثیر جهت یافتگی، فراوانی و تعداد دسته ناپیوستگی‌های متقاطع در مقاومت سنگ تحت تنش‌های سه محوری به روش تجربی و با اجرای پژوهشی گسترده روی سنگ آهک بررسی شده است. نمونه‌هایی شامل سنگ فاقد ناپیوستگی، دارای یک دسته ناپی...
[ 2 ] - Identification of Toxic Shock Syndrome Toxin-1 (TSST-1) gene in Staphylococcus aureus isolated from bovine mastitis milk
Staphylococcus aureus is a major causative pathogen of clinical and subclinical mastitis of dairy domestic ruminants. This agent produces a variety of extracellular toxins and virulence factors including Toxic Shock Syndrome Toxin-1 (TSST-1) which is the major cause of Toxic Shock Syndrome (TSS). In this study 58 S. aureus isolates obtained from 9 dairy herds in East and West Azerbaijan provinc...
[ 3 ] - Study on anti inflammatory effect of scorpion (Mesobuthus eupeus) venom in adjuvant-induced arthritis in rats
Rheumatoid arthritis is an autoimmune disease that causes chronic inflammation of the joints as well as other organs in the body. Adjuvant-induced arthritis models in inbred rats serve as relevant models for RA, having many clinical similarities to this disease. Using honey bee venom as a treatment for Rheumatoid arthritis is an ancient therapy in various parts of the world. However scorpion ve...
[ 4 ] - Study on anti inflammatory effect of subcutaneous honey bee venom injection and dermal application of cream containing honey bee venom in adjuvant-induced arthritic rats
Honey bee sting is used in some societies as a treatment of inflammation in joint diseases such as arthritis. To investigate the effect of honey bee venom in reducing inflammation, we selected 30 male Wister rats which were divided in to 6 groups. Except group 1, all remaining groups received 0.5 ml of complete Freund’s adjuvant to induce arthritis. After 9 days, all animals that received adj...
[ 5 ] - Detection of Neuraminidase Activity in Pseudomonas aeruginosa PAO1
Objective(s) Some properties of neuraminidase produced by Pseudomonas aeruginosa PAO1 growth in a defined medium (BHI) were examined and evaluated for its features. Materials and Methods The obtained supernatant enzyme of P. aeruginosa PAO1 cultures was used in a sensitive fluorometric assay by using 2'-(4-methylumbelliferyl) a-D-N acetylneuraminic acid as substrate. As hydrolyzing MUN with ...
[ 6 ] - The Effect of Silver Nanoparticles on Wounds Contaminated with Pseudomonas aeruginosa in Mice: An Experimental Study
The microorganisms have been usual noted as the major cause of delayed wound healing. Pseudomonas aeruginosa is the most common pathogen causing these infections. Silver nanoparticles (AgNPs) show ample antibacterial activities. In present study, the effect of AgNPs alone and in combination with tetracycline investigated on inoculated wounds with Pseudomonas aeruginosa in mice. Twenty mice anes...
[ 7 ] - Study of antimicrobial susceptibility and plasmid analysis of Escherichia coli in Iran, Urmia
[ 8 ] - The Effect of Silver Nanoparticles on Wounds Contaminated with Pseudomonas aeruginosa in Mice: An Experimental Study
The microorganisms have been usual noted as the major cause of delayed wound healing. Pseudomonas aeruginosa is the most common pathogen causing these infections. Silver nanoparticles (AgNPs) show ample antibacterial activities. In present study, the effect of AgNPs alone and in combination with tetracycline investigated on inoculated wounds with Pseudomonas aeruginosa in mice. Twenty mice anes...
[ 9 ] - ارائه روش جدیدی برای برآورد مقاومت سنگ درزه دار با استفاده از ضریب درزه داری
ناپیوستگی ها دارای ویژگی‌هایی همچون جهت یابی، تعداد دسته و فراوانی هستند که می‌توانند در مقاومت سنگ مؤثر واقع شوند. نمونه های سنگ به ترتیب دارای یک، دو و سه دسته ناپیوستگی متقاطع، فراوانی های مختلف و زاویه شیب صفحه ناپیوستگی ها با جهت افقی برابر با 0، 30، 45، 60 و 90 درجه آماده سازی شدند. با افزایش تعداد دسته ناپیوستگی و فراوانی آنها تعداد قطعات به صورت تصاعدی افزایش یافت. طوری که بخشی از نمونه...
[ 10 ] - ارزیابی اثر توأم آنتی‌بیوتیک فسفومایسین و اسانس آویشن بر روی جدایه‌های مقاوم به متی‌سیلین استافیلوکوکوس اورئوس
Background & Aims : Most of the methicillin resistant S.aureus isolates are resistant to many other antibiotics as well, so they can cause refractory infections. Therefore monitoring and control of these resistant isolates is always a necessity. Phosphomycin is an extended-spectrum antibiotic that inhibits synthesis of bacterial cell wall peptidoglycan and is helpful for controlling methici...
[ 11 ] - بررسی فراوانی ژن‌های مولد انتروتوکسین در استافیلوکوکوس اورئوس‌های جدا شده از نمونه¬های شیر مربوط به التهاب پستان گاو به روش PCR
در سال‌های اخیر روش‌های مولکولی مانند PCR به طور موفقیت‌آمیزی برای شناسایی ژن‌های مختلف در ارگانیسم‌ها به کار رفته است. هدف از تحقیق حاضر شناسایی ژن‌های مولد انتروتوکسین در استافیلوکوکوس اورئوس، به عنوان یک عامل مهم بیماری‌زای انسان، در شیر با استفاده از روش PCR بود. نمونه‌های شیر از گاوداری‌های صنعتی تبریز (5 گاوداری) و ارومیه (4 گاوداری) اخذ گردید. روش‌های باکتریولوژیکی جهت جد...
[ 12 ] - Comparison therapeutic effects of Ciprofloxacin, Silver nanoparticles and their combination in the treatment of Pseudomonas keratitis in rabbit: An experimental study
Pseudomonas aeruginosa is one of the most common causes of keratitis. The current study was done to evaluate the therapeutic effects of antibacterial combinations with Silver nanoparticles (Ag-NPs) and Ciprofloxacin in experimental Pseudomonas keratitis. Sixty four New Zealand rabbits were prepared. All rabbits were randomly categorized into eight groups (each group containing eight rabbits): C...
[ 13 ] - Comparison therapeutic effects of Ciprofloxacin, Silver nanoparticles and their combination in the treatment of Pseudomonas keratitis in rabbit: An experimental study
Pseudomonas aeruginosa is one of the most common causes of keratitis. The current study was done to evaluate the therapeutic effects of antibacterial combinations with Silver nanoparticles (Ag-NPs) and Ciprofloxacin in experimental Pseudomonas keratitis. Sixty four New Zealand rabbits were prepared. All rabbits were randomly categorized into eight groups (each group containing eight rabbits): C...
[ 14 ] - Anti-quorum sensing effects of Licochalcone A and Epigallocatechin-3-gallate against Salmonella Typhimurium from poultry sources
Quorum sensing (QS) is a cell density-dependent mechanism used by many pathogenic bacteria for regulating virulence gene expression. Inhibition or interruption of QS by medicinal plant remedies has been suggested as a new strategy for fighting against antibiotic-resistant bacteria. This study aimed to assess the impact of sub-inhibitory concentrations of licochalcone A (LAA) and epigallocatechi...