نتایج جستجو برای: ccompetitive fluorescence

تعداد نتایج: 107638  

Journal: :cell journal 0

the effect of external magnetic and electric fields, in the range of electroporation and magnetoporation, on lucifer yellow (ly) fluorescence in the absence of cells is studied. electric-field-induced quenching and magnetic field-induced increase are observed for fluorescence intensity of ly. regard to the fact that the variation of field-induced fluorescence, even in the absence of cells, can ...

Journal: :journal of biotechnology and health sciences 0
fatemeh nemati nikoo department of nanotechnology, pharmacuitical sciences branch, islamic azad university, tehran, ir iran koorosh goodarzvand chegini department of biochemistry and genetic, school of medicine, qazvin university of medical sciences, qazvin, ir iran reza najafi pour department of biochemistry and genetic, school of medicine, qazvin university of medical sciences, qazvin, ir iran nematollah gheibi cellular and molecular research center, qazvin university of medical sciences, qazvin, ir iran; cellular and molecular research center, qazvin university of medical sciences, qazvin, ir iran. tel: +98-2813338034

conclusions the expression of recombinant calprotectin, as an effective protein, can help in diagnosis or treatment of inflammatory and cancer processes in the future. furthermore, ca2+ induced a partial change in secondary and tertiary structure of calprotectin subunits and this change is probably necessary for protein dimerization. results interaction of s100a8 and s100a9 in the presence of c...

Journal: :acta medica iranica 0
razzaghi abyaneh m allameh a shams m

aflatoxin contamination of food and feedstuffs is a serious economic and health hazard. over a period of two years, 35 samples of raw pistachio nuts collected from different parts of iran were analysed for the presence of aflatoxigenic strains of the aspergillus flavus group. eighty-five isolates of a.flavus and a.parasiticuswere identified based on specific yello-orange pigment production in t...

Journal: :آب و خاک 0
دانیال رضایی غلامحسین حق نیا امیر لکزیان محمدحسن حسن زاده خیاط حوریه نصیرلی

abstract atrazine biodegradation by bacteria is one of the most important aspects of bioremediation. atrazine can be degraded by various species of bacteria. bacteria use atrazine as nitrogen and carbon sources. the aim of this study was to determine atrazine degradation by pseudomonas fluorescence and pseudomonas aeruginosa. the experiment consisted of two pseudomonas bacteria, three levels of...

Journal: :iranian journal of virology 0
e jafari microbiology&virology department, kerman university of medical sciences, kerman, iran a mohammadi human viral vaccines department, razi vaccine and serum research institute, karaj, iran sam arabzadeh microbiology&virology department, kerman university of medical sciences, kerman, iran f esna-ashari human viral vaccines department, razi vaccine and serum research institute, karaj, iran za sadigh human viral vaccines department, razi vaccine and serum research institute, karaj, iran ghr shokri human viral vaccines department, razi vaccine and serum research institute, karaj, iran

background and aims: rubella is predominantly a childhood disease that is endemic throughout the world and when rubella outbreaks occur, they are accompanied by birth defects following congenital rubella syndrome. immunity to rubella virus as a teratogenic agent has an important role for prevention of these serious congenital defects. lymphocyte proliferation assay is a way for investigation of...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پزشکی 1389

هدف: آفلاتوکسین ها و بخصوص آفلاتوکسین b1، اثرات مرگ بار و جبران ناپذیری روی سلامت انسان دارند. هدف از انجام این تحقیق، توسعه یک روش سریع، ساده، حساس و اختصاصی برای شناسایی و اندازه گیری آفلاتوکسین متصل به آلبومین در سرم خون بعنوان شاخص مهم وضعیت در معرض بودن افراد به این سم می باشد. مواد و روش ها: در این تحقیق سه گروه رات انتخاب و به عنوان گروه تست (تیمار شده با آفلاتوکسین (b1، گروه کنترل من...

Journal: :iranian journal of science and technology (sciences) 2004
b. haghighi

interaction of glucose 6-phosphate dehydrogenase from s. aureofaciens with nad+, nadp+and glucose 6-phosphate were investigated using different fluorescent probes. binding of nad+, nadp+and s-nadph to the native enzyme quenched intrinsic protein fluorescence by 100%, 10% and 21%,respectively, from which kd values of nad+ (6.5 mm), nadp+ (92.0 μm) and s-nadph (122.0 μm)were calculated. binding o...

Journal: :حفاظت گیاهان 0
زینب اورسجی محمد حسن راشد محصل احمد نظامی مجید عباسپور مهدی نصیری محلاتی

measurement of chlorophyll fluorescence is noninvasive, highly sensitive, fast and easy way to give important information about the photosynthetic apparatus. chlorophyll fluorescence parameters and kautsky curves of wild oat and wild mustard sprayed by clodinafop and dicamba+2, 4-d respectively was investigated at two green house experiments. the results indicated significant reduction at trend...

Journal: :iranian red crescent medical journal 0
pooneh amini-geram department of biology, science and research branch, islamic azad university, tehran, ir iran fatemeh goshadrou physiology department, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran, ir iran; physiology department, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran, ir iran azadeh ebrahim-habibi biosensor research center, endocrinology and metabolism molecular-cellular sciences institute, tehran university of medical sciences, tehran, ir iran; endocrinology and metabolism research center, endocrinology and metabolism clinical sciences institute, tehran university of medical sciences, tehran, ir iran parichehreh yaghmaei department of biology, science and research branch, islamic azad university, tehran, ir iran saeed hesami-tackallou department of biology, garmsar branch, islamic azad university, garmsar, ir iran

background glucose is an essential element in the supply of body’s energy. in diseases such as diabetes, glucose increase is associated with disturbance in metabolism. cortisol is an important hormone in the regulation of glucose metabolism, and human serum albumin (hsa) is one of the most important glucose and cortisol transmitters in blood. interaction between albumin and these ligands could ...

Journal: :journal of chemical health risks 0
f. s. goldouzian department of biology, mashhad branch, islamic azad university, mashhad, iran z. s. goldouzian department of biology, mashhad branch, islamic azad university, mashhad, iran m. momen heravi department of chemistry, mashhad branch, islamic azad university, mashhad, iran j. khanchamani department of biology, mashhad branch, islamic azad university, mashhad, iran

mechanism of the binding of lomefloxacin (lmf) with human serum albumin has been studied at physiological ph (7.4) using fluorescence spectroscopic technique. lmf is a third-generation fluoroquinolone antibiotic that exhibits striking potency against a broad spectrum of gram-negative and gram-positive bacteria through inhibition of dna gyrase. lomefloxacin is a drug that is excreted in urine an...

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