نتایج جستجو برای: 1hnmr spectroscopy

تعداد نتایج: 171919  

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه پلیمر و پتروشیمی ایران - پژوهشکده فرایند 1393

در این پژوهش، به منظور بهینه سازی فرآیند انحلال غشاء پلیمری پرفلورینه ی کربوکسیلیکی به عنوان یکی از لایه های غشاء کامپوزیت کلر- آلکالی، با استفاده از مفاهیم انرژی آزاد گیبس، معادلات فلوری- هاگینز و پارامتر حلالیت، اثر مخلوط چندین حلال مختلف، دما، زمان، نسبت حل شونده به حلال و سطح ویژه ی غشاء، بر درصد حلالیت لایه ی پرفلوروکربوکسیلیکی گردید. برای اثبات و بررسی نتایج در این پژوهش از آزمون های lase...

Journal: :iranian journal of medical physics 0
zohreh dehghani bidgoli ph.d. student, biomedical engineering dept., faculty of electrical engineering, tarbiat modares university, tehran, iran. mohammad hosein miranbaygi associate professor, biomedical engineering dept., faculty of electrical engineering, tarbiat modares university, tehran, iran. rasool malekfar associate professor, physics dept., faculty of basic sciences, tarbiat modares university, tehran, iran.

introduction: raman spectroscopy, that is a spectroscopic technique based on inelastic scattering of monochromatic light, can provide valuable information about molecular vibrations, so using this technique we can study molecular changes in a sample. material and methods: in this research, 153 raman spectra obtained from normal and dried skin samples. baseline and electrical noise were eliminat...

Journal: :iranian journal of child neurology 0
guruprasada shetty 1.department of pediatrics, father muller medical college,mangalore karnataka, india kadke shreedhara avabratha 1.department of pediatrics, father muller medical college,mangalore karnataka, india boodyar sanjeev rai 1.department of pediatrics, father muller medical college,mangalore karnataka, india

how to cite this article: shetty g, avabratha k.s, rai b.s. ring-enhancing lesions in the brain: a diagnostic dilemma. iran j child neurol. 2014 summer;8(3): 61-64. abstract the most common radiological abnormality seen in young indian patients with epilepsy is single small enhancing (ring/disc) computed tomographic (ct) lesions. the two most common differential diagnosis of this lesion in clin...

Journal: :Journal of Pharmaceutical Negative Results 2022

The present work deals with the sequence of Novel Pyrazole fused Indole derivatives(4a-4l) were synthesized by simple conventional method andscreened for anthelmintic, antibacterial and anticancer activities. molecular docking studies also performed. All newly synthesizedcompounds structurally characterized on basis IR, 1HNMR Mass spectral analysis. Further, all prepared pyrazole fusedindole de...

Ahmed S.A. Youssef Fatma A. El-Mariaha Heba E. Hashema Magdy M. Hemdanb

Utilization of benzoxazinone for synthesis quinazolinone derivatives with 3-heterocycle side chain. treatment of benzoxazinon 1 with cyano acetohydrazide or thionocarbohydrazide gave the quinazolinone derivatives 2 or 12. quinazolinone 2 has been utilized as synthon for new  pyridinone, oxazet, thiazole, thiazolidinone and quinazolinone derivatives. Thiosemicarbazide and thiosemicarbazone deriv...

Journal: :journal of paramedical sciences 0
vahid changizi technology of radiology and radiotherapy department, center of health information management research, allied medical sciences school, tehran university of medical sciences, tehran, iran farahnaz azarakhsh department of biology, science and research branch, islamic azad university, tehran, iran mehdi pooladi department of biology, science and research branch, islamic azad university, tehran, iran

nowadays brain tumors remain as a significant cause of morbidity and mortality and are often treatment refractory. the grading of brain tumor has an important implication in clinical management. currently, magnetic resonance spectroscopy (mrs) is an important modality in evaluating and grading brain tumors. the aim of this study is  evaluation of metabolites in the differentiation of brain tumo...

Journal: :international journal of nanoscience and nanotechnology 2015
m. nadafan r. malekfar z. dehghani

in this research the composition of polyurethane closed cell (pucc) with two different concentrations of sio2 nanoparticles (1.0 and 2.0 wt%) have been prepared. optical microscopy and sem imaging, watering uptake, ftir and raman spectroscopy of the synthesized samples were carried out. the optical microscopy imaging of samples showed differences in the appearance of matrix produced by applying...

Journal: :iranian journal of pharmaceutical research 0
rabea khoshneviszade biology department, science and research branch, islamic azad university, tehran, iran. bibi sedigheh fazly bazzaz biotechnology research center, drug and food control department, school of pharmacy, mashhad university of medical sciences, mashhad, iran. mohammad reza housaindokht chemistry department, faculty of sciences, ferdowsi university of mashhad, mashhad, iran azadeh ebrahim-habibi endocrinology and metabolism research center, endocrinology and metabolism research institute, tehran university of medical sciences, tehran, iran. omid rajabi drug and food control department, school of pharmacy, mashhad university of medical sciences, mashhad, iran.

the method has been developed and validated for the determination of hydroquinone in liposomal formulation. the samples were dissolved in methanol and evaluated in 293 nm. the validation parameters such as linearity, accuracy, precision, specificity, limit of detection (lod) and limit of quantitation (loq) were determined. the calibration curve was linear in 1-50 µg /ml range of hydroquinone an...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1390

واکنش جایگیری دی متیل استیلن کربوکسیلات و 2- هگزین روی کمپلکس ها مطابق روند زیر انجام شد:در واکنش ترکیب [pd(cl)(x)(phbppy)] با آلکین دی متیل استیلن کربوکسیلات در حلال cl2 ch2ترکیب me)(cl)(phbppy)x] [pdc(co2 me)=c(co2وx= 2,4,6-me3py (1a), mepy(1b) را ایجاد می نماید. در صورتی که از ترکیب [pd(cl)(no2 bppy)(4-mepy)] با آلکین دی متیل استلین کربوکسیلات در حلال ch2cl2 ترکیب مونومر (2)[pd(co2me)c=c(co2...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - پژوهشکده شیمی تجزیه و معدنی 1391

در طی این پروژه ی تحقیقاتی، به منظور تهیه ی سالفن های مورد نظر، ابتدا 2، 3-فنازین دی آمین، مطابق با روش های موجود در مرجع سنتز و شناسایی شد. سپس در نتیجه واکنش دی آمین با دو ترکیب آلدهیدی (سالیسیل آلدهید و 3، 5- دی ترسیوبوتیل -2- هیدروکسی بنزآلدهید) سالفن های مربوطه سنتز و با تکنیک-های ft-ir و 1hnmr شناسایی شدند، سالفن های حاوی فلزات کبالت (ii)، نیکل (ii) و روی (ii) نیز طی یک مرحله واکنش، از 3،...

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