Mehdi Hassanshahian
Associate Professor of Microbiology, Department of Biology, Faculty of Science, Shahid Bahonar University of Kerman, Kerman, Iran
[ 1 ] - Antimicrobial Activity of Combined Extracts of Trachyspermum, Thymus and Pistachio against Some Pathogenic Bacteria
Background: Microbial biofilms are responsible for many human infections and increase of antibiotic resistant bacteria. Therefore, finding an efficient way to prevent infection and biofilm formation of bacteria is essential. Medicinal plants are among suitable candidates to inhibit biofilm formation of bacteria. The aim of this study was to evaluate the antimicrobial effects of...
[ 2 ] - Relationship Between Cell Surface Hydrophobicity and Degradation of Hexadecane
Some properties of compounds in degrading bacteria are required for biodegradation of contaminants to higher performance. Those strains which have a high percentage of these features are more effective at biodegradation. The present experiments were designed to measure these parameters. In this study, measurement of cell surface hydrophobic-degrading bacteria was designed which oil was separate...
[ 3 ] - Degradation of Alkanes in Contaminated Sites
Petroleum hydrocarbons are important energy resources used by industry and in our daily life, whose production contributes highly to environmental pollution. To control such risk, bioremediation constitutes an environmentally friendly alternative technology that has been established and applied. It constitutes the primary mechanism for the elimination of hydrocarbons from contaminated sites by ...
[ 4 ] - Isolation and characterization of phenol degrading bacteria from Persian Gulf
Phenol and phenol compounds are environmental pollutants present in industrial wastewaters such as, coal tar, oil refineries and petrochemical plants exist. Phenol removal from industrial effluent is extremely important in protection of environment. Recently phenol biodegradation has been considered. Marine bacteria are the most important phenol biodegrader. In this study, the phenol-degrading ...
[ 5 ] - The effects of crude oil on marine microbial communities in sediments from the Persian Gulf and the Caspian Sea: A microcosm experiment
Changes in the microbial community in response to catastrophic oil spills in marine and fresh water environments have been well documented. Molecular methods provide tools for analyzing the entire bacterial community, covering also those bacteria that have not been cultured in the laboratory. In this study, four different microcosms were set up containing sediments collected from the Persian Gu...
[ 6 ] - Antimicrobial activity of Trachyspermum ammi essential oil against human bacterial
The aim of this study was to evaluate the antimicrobial activities of Trachyspermum ammi, essential oil against different kinds of microorganisms by microtiter plate method. All 36 isolates of (12 Klebsiella pneumoniae, 12 E.coli and 12 Staphylococcus aureus) isolated from urine culture of hospitalized patients (Amir Al-Momenin Hospital, Zabol, south-eastern ...
[ 7 ] - Cloning and gene expression of cytochrome P450 gene from Alcanivorax borkumensis Bacterium
Alcanivorax borkumensis is a marine bacterium that has ability to grow on limited substrates that mainly is alkanes. The ability to use wide range of hydrocarbons is advantage of this bacterium to other marine community bacteria. A. borkumensis have two genetic systems for alkane biodegradation. The First system is alkane hydroxylase (alk-B1and alk-B2) and the second system is...
[ 8 ] - Survey frequency of verotoxigenic Escherichia coli (VTEC) in raw milk at Kerman city
Diarrhea is an important hygienic problem in under development countries. Among pathogenic agents Escherichia coli is the most etiologic agent of diarrhea in children below five years old. Some E. coli strains produce cytotoxins that have cytopathic effect on vero cell and identified as verotoxin. This study performs for resolve frequency of Vero Toxigenic Escherichia coli...
[ 9 ] - Hydrophobicity effect on oil degradation by two marine bacterial strains Alcanivorax borkumensis and Thalassolituus oleivorans
Variations on hydrophobicity were monitored in two marine obligate hydrocarbonoclastic bacteria: Alcanivorax borkumensis SK2T and Thalassolituus oleivoras MIL-1T. These strains were inoculated, separately in ONR7a mineral medium with different concentration of sodium acetate. During 10 days measurements of cellular abundance and cellular hydrophobicity (capacity to adhere at polystyrene) were c...
[ 10 ] - جداسازی و شناسایی باکتریهای تجزیه کننده گازوئیل از خاک‌های آلوده به مواد نفتی در استان خوزستان
مقدمه: گازوئیل که یکی از محصولات عمدۀ نفت خام است، منبع عمدۀ آلودگی محیط زیست به شمار می‌رود و می‌تواند آثار خطرناک زیستی بر محیط اطراف بگذارد. یکی از روش‌های بازیابی این مناطق آلوده و واردکردن آن‌ها به چرخۀ تولید محصول سالم، حذف آلاینده‌ها با روش‌های زیستی است که از این میان روش تجزیۀ زیستی با توجه به استفاده از توان طبیعی و پتانسیل‌های نهفتۀ طبیعت و هزینۀ کمتر بیشتر موردِتوجه بوده است. مواد و ...
[ 11 ] - Antimicrobial Activity of Five Medicinal Plants on Candida Albicans
Background: In recent years, drug resistance to human pathogenic fungi has been increased. Medicinal plants are one way to overcome antibiotic resistance. The aim of this study was to evaluate the antifungal and inhibitory activity of five medicinal plants on the growth of Candida albicans. Methods: This study was done in the Microbiology Lab of Shahid Bahonar University of Kerman, Iran in 2...
[ 12 ] - Isolation and Characterization of Diazinon Degrading Bacteria from Contaminated Agriculture Soils
Background: Organic agricultural pesticides are so stable in ecosystems and biosphere. These compounds affect soil conditions and agricultural products. The aim of this study was isolation of diazinon-degrading bacteria from Kerman pistachio orchards, Southeastern Iran. Methods: Diazinon-degrading bacteria were enriched in Bushnell-Hass medium. Identification and sequencing of prevalent degr...
[ 13 ] - بررسی رابطه بین وجود ژن آلکان هیدروکسیلاز و تجزیه ترکیبات آلیفاتیک
سابقه و هدف: آلودگی هیدروکربنی امروزه یکی از مهمترین معضلات زیست محیطی می باشد. هیدروکربن های نفتی یک مخلوط پیچیده هستند و به چهار گروه مختلف تقسیم می شوند: ترکیبات اشباع، آروماتیکها، رزینها و آسفالتنها. از بخشهای مختلف نفت خام آلکانهای با زنجیره حد واسط (C10-C20) سو بستراهای ترجیحی می باشند که تمایل به تجزیه خیلی سریع دارند در حالیکه ترکیبات با زنجیره کوتاه بسیار سمی بوده و آلکان های با زنجی...
[ 14 ] - Relationship Between Cell Surface Hydrophobicity and Degradation of Hexadecane
Some properties of compounds in degrading bacteria are required for biodegradation of contaminants to higher performance. Those strains which have a high percentage of these features are more effective at biodegradation. The present experiments were designed to measure these parameters. In this study, measurement of cell surface hydrophobic-degrading bacteria was designed which oil was separate...
[ 15 ] - Degradation of Alkanes in Contaminated Sites
Petroleum hydrocarbons are important energy resources used by industry and in our daily life, whose production contributes highly to environmental pollution. To control such risk, bioremediation constitutes an environmentally friendly alternative technology that has been established and applied. It constitutes the primary mechanism for the elimination of hydrocarbons from contaminated sites by ...
[ 16 ] - Isolation and characterization of phenol degrading bacteria from Persian Gulf
Phenol and phenol compounds are environmental pollutants present in industrial wastewaters such as, coal tar, oil refineries and petrochemical plants exist. Phenol removal from industrial effluent is extremely important in protection of environment. Recently phenol biodegradation has been considered. Marine bacteria are the most important phenol biodegrader. In this study, the phenol-degrading ...
[ 17 ] - The effects of crude oil on marine microbial communities in sediments from the Persian Gulf and the Caspian Sea: A microcosm experiment
Changes in the microbial community in response to catastrophic oil spills in marine and fresh water environments have been well documented. Molecular methods provide tools for analyzing the entire bacterial community, covering also those bacteria that have not been cultured in the laboratory. In this study, four different microcosms were set up containing sediments collected from the Persian Gu...
[ 18 ] - Antimicrobial activity of Trachyspermum ammi essential oil against human bacterial
The aim of this study was to evaluate the antimicrobial activities of Trachyspermum ammi, essential oil against different kinds of microorganisms by microtiter plate method. All 36 isolates of (12 Klebsiella pneumoniae, 12 E.coli and 12 Staphylococcus aureus) isolated from urine culture of hospitalized patients (Amir Al-Momenin Hospital, Zabol, south-eastern ...
[ 19 ] - Cloning and gene expression of cytochrome P450 gene from Alcanivorax borkumensis Bacterium
Alcanivorax borkumensis is a marine bacterium that has ability to grow on limited substrates that mainly is alkanes. The ability to use wide range of hydrocarbons is advantage of this bacterium to other marine community bacteria. A. borkumensis have two genetic systems for alkane biodegradation. The First system is alkane hydroxylase (alk-B1and alk-B2) and the second system is...
[ 20 ] - Survey frequency of verotoxigenic Escherichia coli (VTEC) in raw milk at Kerman city
Diarrhea is an important hygienic problem in under development countries. Among pathogenic agents Escherichia coli is the most etiologic agent of diarrhea in children below five years old. Some E. coli strains produce cytotoxins that have cytopathic effect on vero cell and identified as verotoxin. This study performs for resolve frequency of Vero Toxigenic Escherichia coli...
[ 21 ] - The anti-biofilm effects of sponge (Callyspongia sp.) and two sea anemones (Zoanthus sansibaricus and Cerianthus lloydii) collected from the Persian Gulf
Background: Sponges and sea anemones do not have specialized defense organs. Instead, they rival harmful microorganisms by producing certain compounds. These compounds can also be useful against some human pathogens. This study aimed to investigate the antimicrobial effects of bioactive products from these marine animals. Methods: Two species of sea anemone <e...
[ 22 ] - بررسی باکتریهای تجزیه‌کننده نفت خام فاضلاب‌های صنعتی شیراز
سابقه و هدف:آلودگی محیط زیست با نفت و مشتقات آن تهدیدی جدی برای سلامت انسان و محیط زیست می‌باشد، لذا تصفیه این مواد از اهمیت بالایی برخوردار است. فرایند زیست پالایی، به عنوان استفاده از میکروارگانیسم‌ها برای حذف بسیاری از آلاینده‌های زیست محیطی از جمله فاضلاب‌های صنعتی تعریف می‌شود. هدف از این تحقیق جداسازی و تعیین خصوصیات باکتریهای تجزیه کننده نفت خام در برخی ازفاضلا...
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