نتایج جستجو برای: magnetic nanobeads

تعداد نتایج: 338692  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده علوم پایه 1391

در این رساله پس از مقدمه ای مربوط به مواد مغنا طیسی به بررسی مدل آیزینگ توسط روش مونت کارلو پرداخته شده است. روابطی مانند پذیرفتاری مغناطیسی و ظرفیت گرمایی مورد بررسی قرار می گیرد و نمودار مغناطش بر حسب دما و میدان و همچنین حلقه پسماند را محاسبه میکنیم. در ادامه به خاصیت سوپر پارامغناطیس در مواد dms(diluet magnetic semiconductors) میپردازیم که با روش تجربی و بدست آوردن نمودار های ذکر شده نشان م...

Journal: :physical chemistry research 0
gholam hossein bordbar shiraz university n. taheri shiraz university

in this paper, the hartree-fock method has been formulated to investigate some of the ground state properties of quasi-one-dimensional interacting electron gas in the presence of the magnetic field. the bare coulomb interaction between electrons has been assumed. for this system, we have also computed some of its thermodynamic and magnetic properties such as the energy, pressure, incompressibil...

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

in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...

Journal: :iranian journal of astronomy and astrophysics 2014
elham bazyar ali ajabshirizadeh zahra fazel jean-pierre rozelot

virial theorem is important for understanding stellar structures. it produces an interesting connection between magnetic and gravitational energies. using the general form of the virial theorem including the magnetic field (toroidal magnetic field), we may explain the solar dynamo model in relation to variations of the magnetic and gravitational energies. we emphasize the role of the gravitatio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم پایه دامغان - دانشکده علوم پایه دامغان 1394

در بین انواع نانوذره ها، نانوذره های مغناطیسی (mnps) نظر به کاربرد های بسیاری که در حوزه های مختلفی همچون مایعات مغناطیس (magnetic fluids) کاتالیز (catalysis) ، تصویربرداری رزونانس مغناطیسmagnetic resonance imaging) ) و بازسازی محیط زیست (environmental remediation) دارند توجه پژوهشگران را به خود جلب نموده اند [1]. این نانوذره ها سوپرپارامغناطیس هایی اند که می توانند جذب میدان مغاطیسی شوند اما خ...

2016
Frank M. Hauser Gerd Knupp Simon Officer

This paper deals with the synthesis and application of lanthanide complex doped nanobeads used as a luminescent fingerprint powder. Due to their special optical properties, namely a long emission lifetime, sharp emission profiles and large Stokes shifts, luminescent lanthanide complexes are useful for discriminating against signals from background emissions. This is a big advantage because late...

2007
Simone Pantalei Emiliano Zampetti Antonella Macagnano Andrea Bearzotti Iole Venditti Maria V. Russo

In this study the sensorial performances of a four-channel quartz crystalmicrobalance implemented on a single quartz plate are reported and compared with those offour independent quartz crystal microbalances. Particular attention has been devoted to bothcross talk in responses and sensor sensitivity. A recently synthesized nanostructuredpolymer, poly[phenylacetylene-(co-2-hydroxyethyl methacryl...

Journal: :پژوهش های زراعی ایران 0
محمد حسن راشد محصل اکبر علی وردی

in order to compare effect of magnetic field and frigate surfactant to enhance the efficacy of iodosulfuron-methyl-sodium plus mesosulfuron-methyl (chevalier) to control wild oat, a greenhouse experiment of dose-response was conducted. treatments were 0, 3, 6, 12, 18 and 24 doses g a.i. ha-1 of chevalier (i) without treatment, (ii) with frigate % 0.1 v/v, (iii) with magnetic field, and (iv) fri...

Journal: :مکانیک سیالات و آیرودینامیک 0
امین حدیدی محمدرضا انصاری

in this study, the effects of strength and direction of the magnetic field on lid-driven cavity flow in the whole range of magnetic field strength variations, which already used in practice up to present (0 to 10 tesla), are studied. the governing equations, including conservative equations of momentum, continuity and magnetic field equations were solved numerically. momentum and continuity equ...

Journal: :iranian rehabilitation journal 0
sanaz khomami ahwaz university, ahvaz, iran. reza rostami tehran university, tehran, iran. reza kazemi lorestan university, khorram abad, iran.

in this study, the authors reported a case of woman with severe compulsion who became pregnant during the repetitive transcranial magnetic stimulation. we carried out repetitive transcranial magnetic stimulation and behavior therapy simultaneously after repeated medications' refraction. the patient received 20 sessions 1 hz repetitive transcranial magnetic stimulation in right dorsolateral...

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