نتایج جستجو برای: sn complex
تعداد نتایج: 807348 فیلتر نتایج به سال:
There is a consensus that type Ia supernovae (SNe Ia) arise from the thermonuclear explosion of white dwarf stars that accrete matter from a binary companion. However, direct observation of SN Ia progenitors is lacking, and the precise nature of the binary companion remains uncertain. A temporal series of high-resolution optical spectra of the SN Ia PTF 11kx reveals a complex circumstellar envi...
This research presents an optimization technique for multiple routes generation using simulated niche based particle swarm optimization for dynamic online route planning, optimization of the routes and proved to be an effective technique. It effectively deals with route planning in dynamic and unknown environments cluttered with obstacles and objects. A simulated niche based particle swarm opti...
Cell membranes show complex behavior, in part because of the large number of different components that interact with each other in different ways. One aspect of this complex behavior is lateral organization of components on a range of spatial scales. We found that lipid-only mixtures can model the range of size scales, from approximately 2 nm up to microns. Furthermore, the size of compositiona...
The symmetric group Sn acts as a reflection group on CP n−2 (for n ≥ 3) . Associated with each of the ( n 2 ) transpositions in Sn is an involution on CP that pointwise fixes a hyperplane—the mirrors of the action. For each such action, there is a unique Sn-symmetric holomorphic map of degree n+1 whose critical set is precisely the collection of hyperplanes. Since the map preserves each reflect...
In most supply chains (SCs), transaction relationships between suppliers and customers are commonly considered to be an extrapolation from a linear perspective. However, this traditional linear concept of an SC is egotistic and oversimplified and does not sufficiently reflect the complex and cyclical structure of supplier-customer relationships in current economic and industrial situations. The...
Sentinel node (SN) biopsy has become standard in staging of cutaneous melanoma. As skin lymphatic drainage is complex, preoperative empirical assessment of SN localization is virtually impossible. Therefore in order to identify all regional lymphatic basins corresponding to a specific primary tumor is mandatory to carry out preoperative lymphoscintigraphy. In this paper we present a clinical ca...
New calculations are presented for Gamow-Teller beta decay of nuclei near 'Sn. Essentially all of the Sn Gamow-Teller decay strength is predicted to go to a single state at an excitation energy of 1.8 MeV in In. The first calculations are presented for the decays of neighboring odd-even and odd-odd nuclei which show, in contrast to ' Sn, surprisingly complex and broad Gamow-Teller strength dist...
The effect of Sn concentration on the corrosion resistance of Pb-Sn alloy in H2S04 electrolyte was investigated by potentiodynamic polarization. A new approach to calculate the exchange current density, icol'n was proposed and proved to be in accordance with the experimental results. This study shows that with the increase of alloying Sn, the corrosion rate of the alloy increased and then decre...
The identity of the predominating tin(ii)-hydroxide complex formed in hyper-alkaline aqueous solutions (0.2 ≤CNaOH≤ 12 mol dm(-3)) is determined by potentiometric titrations, Raman, Mössbauer and XANES spectroscopy, supplemented by quantum chemical calculations. Thermodynamic studies using a H2/Pt electrode up to free hydroxide concentrations of 1 mol dm(-3) showed the presence of a single mono...
سنتز نانو ساختارهای پلاتین-قلع با استفاده از کمپلکس آلی – فلزی پلاتین و قلع در مرز مشترک تولوئن - آب
آلیاژ شدن فلزات غیر نجیب با پلاتین یک روش محبوب برای تولید کاتالیزورهای پلاتینی است که همراه با کاهش مصرف و افزایش فعالیت پلاتین است. این پژوهش، یک روش ساده و موثر جهت تهیه ی لایه ی نازک نانوذرات pt/sn، pt3/sn/go و pd/sn بر اساس کاهش کمپلکس ptcl2(cod)]]، pdcl2(cod)]] و ترکیب snme4 در سطح مشترک تولوئن-آب و در غیاب پایدار کننده ارائه می دهد. استفاده از پیش ماده ی آلی-فلزی که قادر به تخریب به صورت...
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