نتایج جستجو برای: magnetic method

تعداد نتایج: 1929051  

آرپنائی, ایوب, توبی, فروغ, دیزجی, عبدالخالق, عقابیان, محمدعلی, فاطمی, سید صفا علی,

Background and purpose: One of the most important challenges in nanomedicine is timely diagnosis and effective treatment of chronic disease. The aim of this research was to synthesize and characterize 3-layered magnetic silica nanocomposite with simultaneous application as a contrast agent in magnetic resonance imaging (MRI) and for drug delivery. Materials and methods: In this research, magne...

Journal: :Geophysical Journal International 2022

SUMMARY We present the magnetic on-time transient electromagnetic (MoTEM) method for obtaining information about subsurface susceptibility from (TEM) measurements. The uses primary field produced by a TEM system as inducing and extracts measured late response responses susceptibility. assumes that transmitter waveform is long enough to allow dissipation of eddy currents until electric conductiv...

سیدجواد هاشمی‌فر, , صدیقه سیروسی, , ناهید قادری, , هادی اکبرزاده, ,

  The incommensurate spin -density –wave magnetism of Cr has attracted great interest since its discovery via neutron scattering. Although the existence of spin- density –wave has been confirmed by experiment but the calculations which have been carried out have not been able to predict the correct ground state magnetic phase for chromium yet. To predict the magnetic hyperfine field at nucleus ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پایه 1393

این پایان¬نامه شامل دو قسمت به قرار ذیل می¬باشد: 1-نانو¬ذرات fe3o4 به روش هم¬رسوبی سنتز شده و در محلولی از استیک اسید شامل کیتوسان¬، پراکنده می¬شود. در ادامه از glyoxal به عنوان عامل متصل¬کننده برای سنتز دو فیلم magnetic chitosan/glyoxal و magnetic chitosan/glyoxal/pva استفاده شده¬است. از فیلم¬های سنتز شده فوق به عنوان جاذبی کارآمد¬، قابل بازیافت و زیست¬سازگار جهت حذف فلز کروم¬(vi) از محلول¬ها...

Journal: Nanochemistry Research 2019

In this paper, three techniques to obtain capped magnetite nanoparticles were compared. In the formation of magnetite nanoparticles via the co-precipitation route, capping agents were introduced pre-, simultaneously with, or post-addition of the precipitating agent, ammonia. The amino acids L-glutamine and L-glutamic acid were used as the capping agents. Characterization via TEM, pXRD, EDX, and...

Journal: :فیزیک زمین و فضا 0
وحید ابراهیم زاده اردستانی مؤسسه ژئوفیزیک دانشگاه تهران، دانشیار

the method expressed by salem and ravat. (2003) for depth estimation of magnetic sources is used on gravity anomalies for the first time. the depth of some rectangular prisms as synthetic models are estimated through the method. the gravity effect of these models is also considered with a relatively high value of random noise. a field example is also included and the depth of the main anomaly h...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم پایه دامغان 1389

in this thesis, ‎‎using‎‎ ‎concept‎s‎ ‎of‎ ‎wavelet‎s‎ ‎theory ‎‎‎som‎e‎ ‎methods‎‎ ‎of‎ ‎th‎e ‎solving‎‎ ‎optimal‎‎ ‎‎con‎tr‎ol‎ problems ‎(ocps)‎‎. ‎g‎overned by time-delay systems is investigated. ‎th‎is‎ thesis contains ‎tw‎o parts. ‎‎first, the method of obtaining ‎o‎f ‎the‎ ‎‎ocps‎ in time delay systems by linear legendre multiwavelets is ‎ ‎presented‎.‎‎‎‎ the main advantage of the meth...

Journal: :فیزیک زمین و فضا 0
کمال علمدار دانشجوی دکتری اکتشاف معدن، دانشکده مهندسی معدن، نفت و ژئوفیزیک دانشگاه صنعتی شاهرود، ایران عبدالحمید انصاری دانشیار ژئوفیزیک اکتشافی، دانشکده مهندسی معدن و متالورژی دانشگاه یزد، ایران ابوالقاسم کامکار روحانی دانشیار ژئوفیزیک اکتشافی، دانشکده مهندسی معدن، نفت و ژئوفیزیک دانشگاه صنعتی شاهرود، ایران

gravity and magnetic data are usually processed and interpreted separately, and fully integrated results basically are created in the mind of the interpreter. data interpretation in such a manner requires an interpreter experienced both on topics concerning potential field theory and the geology of the study area. to simplify the joint interpretation of data, the automatic production of auxilia...

The use of magnetic fields in targeted drug delivery, especially for treatment of cancers and tumoral regions, is one of the significant techniques in the field of modern methods of treatment. Considering that many vital biological tissues have been located deep in the body, then for targeted drug delivery and effective treatment in these tissues, it is required to bring therapeutic agent to th...

H. Mohammadi Kamrava M. Barati

In this paper we investigate the effect of a random transverse field, distributed according to a trimodal distribution, on the phase diagram and magnetic properties of a two-dimensional lattice (square with z=4),  ferromagnetic Ising system consisting of magnetic atoms with spin-1. This study is done using the effectivefield theory (EFT) with correlations method. The equations are derived using...

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