Ahmad Reza Shahverdi
Tehran University of Medical Sciences
[ 1 ] - Antimicrobial Activities of Three Medicinal Plants and Investigation of Flavonoids of Tripleurospermum disciforme
Rosa damascena, Tripleurospermum disciforme and Securigera securidaca were used as disinfectant agents and for treatment of some disease in folk medicine of Iran. The antimicrobial effects of different fractions of seeds extract of S. securidaca, petals extract of R. damascena and aerial parts extract of T. disciforme were examined against some gram positive, gram negative and fungi by cup plat...
[ 2 ] - Combined application of sub-toxic level of silver nanoparticles with low powers of 2450 MHz microwave radiation lead to kill Escherichia coli in a short time
Objective(s):Electromagnetic radiations which have lethal effects on the living cells are currently also considered as a disinfective physical agent. Materials and Methods: In this investigation, silver nanoparticles were applied to enhance the lethal action of low powers (100 and 180 W) of 2450 MHz electromagnetic radiation especially against Escherichia coli ATCC 8739. Silver nanoparticles ...
[ 3 ] - Isolation and characterization of a fungus for extracellular synthesis of small selenium nanoparticles
The use of biogenic selenium nanoparticles for various purposes is going to be an issue of considerable importance; thus, appropriate simple methods should be developed and tested for the synthesis and recovery of these nanoparticles. In this study, a fungus was isolated from a soil sample, identified as Aspergillus terreus and used for extracellular synthesis of selenium nanoparticles (Se NPs)...
[ 4 ] - Antimicrobial Activities of Three Medicinal Plants and Investigation of Flavonoids of Tripleurospermum disciforme
Rosa damascena, Tripleurospermum disciforme and Securigera securidaca were used as disinfectant agents and for treatment of some disease in folk medicine of Iran. The antimicrobial effects of different fractions of seeds extract of S. securidaca, petals extract of R. damascena and aerial parts extract of T. disciforme were examined against some gram positive, gram negative and fungi by cup plat...
[ 5 ] - ماهی زبرا: فنآوری کشف و ارزیابی ترکیبات طبیعی
چالش‌های موجود در روند کشف داروهای جدید، توجه روزافزونی را به سوی منابع طبیعی به عنوان مخازنی مناسب جهت استخراج و معرفی ترکیبات موثره با فعالیت‌های بیولوژیکی متنوع جلب نموده است. با درنظرگرفتن روش‌های مختلف معتبر‌سازی و سنجش‌های زیستی موجود، در سال‌های اخیر ماهی زبرا به عنوان یک مدل مناسب سنجش زیستی و همچنین استراتژی جالب توجه برای معرفی ترکیبات با آثار فارماکولوژی جدید تبدیل شده است. در این م...
[ 6 ] - THE GREEN SYNTHESIS OF GOLD NANOPARTICLES USING THE ETHANOL EXTRACT OF BLACK TEA AND ITS TANNIN FREE FRACTION
Abstracts: nanoparticles. All the extracts were used separately for the synthesis of gold nanoparticles through the reduction ofaqueous AuClgold ions to gold nanoparticles. The ethanol extract of black tea and its tannin free ethanol extract produced goldnanoparticles in the size ranges of 2.5-27.5 nm and 1.25-17.5 nm with an average size of 10 nm and 3 nm, respectively.The prepared colloid gol...
[ 7 ] - Th1 Immune Response Induction by Biogenic Selenium Nanoparticles in Mice with Breast Cancer: Preliminary Vaccine Model
Background: Tumor associated antigens can be viably used to enhance host immune response. Objectives: The immunomodulatory effect of biogenic selenium nanoparticles (SeNPs) was compared between treated and untreated mice with crude antigens of 4T1 cells. Materials and Methods: Female inbred BALB/c mice (60) were injected by cancinogenic 4T1 cells causing breast cancer. After 10 days, all tumor ...
[ 8 ] - Enhancement Effect of Berberis vulgaris var. integerrima Seeds on the Antibacterial Activity of Cephalosporins against Staphylococcus aureus and Escherichia coli
To evaluate the enhancement effect of Berberis vulgaris var. integerrima seeds on the antibacterial activity of cephalexin and ceftizoxime against Staphylococcus aureus and Escherichia coli ethanol extract of the seeds were prepared. Disk diffusion and broth dilution methods were used to determine the antibacterial activity of two cephalosporins in the ...
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