نتایج جستجو برای: chemical shielding:chemical shifl
تعداد نتایج: 377981 فیلتر نتایج به سال:
geometrical structure, nuclear magnetic resonance (n1,1it) chemical shielding tensors, and chemical shiftsof silicon and carbon nucler are investigated for twn infinite size zigzag and armchair single-walled siliconcarbide nanotabes (sicnts). geometrical structures of sients, sit bonds and bond angles of st and cvertices in both zigzag and armchair nanotubes, indicate that bond lengths are appr...
with the increasing population and the need for more food, as well as with the development of science and technology, human approach to unnatural and often chemical inputs to increase agricultural production has been a great expansion and problems such as increased cancers, chronic diseases has created environmental pollution. implementation of organic organic is a solution to these problems . ...
one of the applications of nanotechnology is use of carbon nanotubes for the targeted delivery of drug molecules. to demonstrate the physical and chemical properties of biomolecules and identify new material of drug properties, the interaction of carbon nanotubes (cnts) with biomolecules is a subject of many investigations. cnts is a synthetic compound with extraordinary mechanical, thermal, el...
Dansyl phosphatidylethanolamine (DPE) (dansyl, 5dimethylaminonaphthalene-1-sulfonyl) was incorporated into human plasma very low density lipoproteins (VLDL). Concomitant with its lipolysis, DPE-VLDL undergoes a greater than %fold fluorescence enhancement, a large increase in fluorescence polarization, and a 20 nm blue shifl in the wavelength of its emission maxima. Based on fluorescence quenc...
The use of Per Survivor Processing (PSP) is considered in the detection of a Continuous Phase Frequency Shifl keying (CPFSK) signal. It is shown that PSP can enable the use of a trellis structure for the demodulation that is different from the trellis structure used to generate the CPFSK signal. This allows one to select a receive trellis structure with fewer phases, resulting in a reduced stat...
Geometrical structure, nuclear magnetic resonance (N1,1It) chemical shielding tensors, and chemical shiftsof silicon and carbon nucler are investigated for twn infinite size zigzag and armchair single-walled siliconcarbide nanotabes (SiCNTs). Geometrical structures of SieNTs, Sit bonds and bond angles of St and Cvertices in both zigzag and armchair nanotubes, Indicate that bond lengths are appr...
a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...
پیل سوختی میکروبی(mfc) شکل جدیدی از انرژی تجدید پذیر است.دراین پیل ها مواد آلی به عنوان سوخت مصرف می شوند وباازتجزیه مواد آلی توسط باکتریها انرژی الکتریکی تولید می شود.فاضلاب وپساب نیز می توانند به عنوان سوخت درپیل مصرف شوند وضمن تولید انرژی الکتریکی پساب نیز تصفیه می شود. در این تحقیق روند تولید انرژی وتصفیه شدن پساب با بررسی جریان،مقاومت ، ولتاژ پیل وآنالیز cod,tds,ec الکترولیت بررسی می شود. ...
We present theoretical analyses of two different aspects ofthe time dependence of the fluorescence Stokes shift in polar liquids. We show that a small deviation from the Debye form for the dielectric relaxation of the solvent can strongly influence the time evolution of the Stokes shift. Using the Davidson-Cole form for dielectric response we find a stretched exponential time dependence as obse...
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