نتایج جستجو برای: uvvis spectroscopy

تعداد نتایج: 171527  

Journal: :journal of agricultural science and technology 2011
a. m. nikbakht t. tavakkoli hashjin r. malekfar b. ghobadian

tomato is a major fruit, as well as a major food science product. there is a need of determining the quality attributes of this fruit (nondestructively) due to the increasing demand of the in agro-industrially controlled areas. most of the commonly employed techniques are time consuming and involve a considerable degree of manual work. sample preparation, juice making, and laboratory tests ...

Journal: :journal of dental research, dental clinics, dental prospects 0
tahereh-sadat jafarzadeh mohammad erfan marjan behroozibakhsh mostafa fatemi reza masaeli yashar rezaei

background and aims. polymerization efficacy affects the properties and performance of composite resin restorations. the purpose of this study was to evaluate the effectiveness of polymerization of two micro-hybrid, two nano-hybrid and one nano-filled ormocer-based composite resins, cured by two different light-curing systems, using fourier transformation infrared (ft-ir) spectroscopy and vicke...

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: :iranian journal of parasitology 0
guocai yang dept. of radiology (mri), qinghai provincial people's hospital, xining, china. qingxin zhang dept. of radiology (mri), qinghai provincial people's hospital, xining, china. guibo tang dept. of radiology (mri), qinghai provincial people's hospital, xining, china. hui xu dept. of radiology (mri), qinghai provincial people's hospital, xining, china. zhen yang dept. of radiology (mri), qinghai provincial people's hospital, xining, china. jianzhong guo dept. of radiology (mri), qinghai provincial people's hospital, xining, china.

background: to analyze the characteristic performance of magnetic resonance spectroscopy (mrs) and susceptibility weighted imaging (swi) in cerebral alve-olar echinococcosis (cae). methods: we retrospectively analyzed 10 clinical-identified cae cases mr per-formance, and summarized the mrs and swi performance of cae. results: the 10 cases of cae all had the history of primary hae, among who 6 c...

Journal: :iranian journal of radiology 0
parinaz mehnati department of medical physics, school of medicine, tabriz university of medical sciences, tabriz, iran maede jafari tirtash department of medical physics, school of medicine, tabriz university of medical sciences, tabriz, iran; department of medical physics, school of medicine, tabriz university of medical sciences, tabriz, iran. fax: +98-4133364660 mohammad sadegh zakerhamidi research institute for applied physics and astronomy, tabriz university, tabriz, iran parisa mehnati research institute for applied physics and astronomy, tabriz university, tabriz, iran

objectives in this study, the absorption coefficient of hemoglobin (hb) was used to distinguish between normal and abnormal breast tissue. materials and methods a near-infrared source (637 nm) was transmitted from major and minor vessels of a breast phantom containing 2×, 4× concentrations of oxy- and deoxy-hb. the absorption coefficients were determined from spectrometer (sm) and powermeter (p...

Journal: :iranian journal of radiology 0
ho kyun kim department of radiology, school of medicine, catholic university of daegu, daegu, korea mun han department of medical and biological engineering, kyungpook national university, daegu, korea hui joong lee department of radiology, kyungpook national university hospital, daegu, korea; department of radiology, kyungpook national university hospital, daegu, korea. tel: +82-534205390; fax: +82-53422-2677

a 36-year-old woman, diagnosed with systemic lupus erythematosus (sle), showed bulbar symptoms including impaired memory, slurred speech and swallowing difficulty 7 days before admission. magnetic resonance imaging (mri) showed symmetric confluent hyperintensities in the bilateral cerebral white matter on t2 weighted imaging (t2-wi), extended into the genu of the internal capsule and the crus c...

Journal: :iranian journal of catalysis 2013
narges samadani langeroodi

the reaction kinetics of the isomerization 3,4-dichlorobutene-1 to 1,4-dichlorobutene-2 was investigated by using gas-liquid chromatography method in the presence of fe2o3/mgo as solid catalyst in the temperature range 25-55°c. fe2o3/mgo has been prepared by the support saturation method, tested in the isomerization of 3, 4-dichlorobutene-1 into 1, 4-dichlorobutene-2. this catalyst shows a high...

Journal: :international journal of nanoscience and nanotechnology 2013
sh. sohrabnezhad* d. rezaei ochbelgh n. morsali golboos

in this research, cobalt and nickel sulfide nanoparticles (nps) were grown on almcm-41 matrix by using ion exchange method. the prepared samples were irradiated by thermalized neutron that emitted from am-be source up to fluencies (7.9+e9n/cm2). after that, x-ray diffraction (xrd), uv-vis spectroscopy, fourier transform infrared (ftir), scanning electron microscopy (sem) and transmission electr...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2003
mehran dadpu ali reza mahjoob saeid amani

the synthesis, spectroscopic and magnetic characterization of a series of new alkoxo-bridged binuclear copper (ii) compounds are described. all complexes have the general formula [cu (m-or)(l)2]2(clo4)2 · x h2o, in which m-or = ch3o-, c2h5o- or c3h7o-, l = 2-amino-4-methylpyridine (abbreviated a4pic) and 2-amino-5-methylpyridine ( abbreviated a5pic). the title compounds all consist of dinuclear...

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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