نتایج جستجو برای: backbone anisotropy
تعداد نتایج: 55817 فیلتر نتایج به سال:
Cohesive-frictional soils are widely used in the construction of embankment structures and due to the method of construction, i.e. applying compactive efforts in the vertical direction in these cases, the occurrence of anisotropy in the soil strength and permeability seems to be inevitable. In this study, attempts have been made to evaluate the shear strength of c-f soils through modifying a l...
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تأثیر ناهمسانی مکانیکی و ناهمگونی پارامترهای مقاومت برشی خاک‌ها بر ظرفیت باربری دراز مدت پی‌های سطحی
Natural formation of soil deposits causes heterogeneity and anisotropy in their strength and stiffness properties. However, most soils in their natural states exhibit some anisotropy with respect to shear strength and heterogeneity with respect to the depth. In this paper, the standard Mohr- Coulomb constitutive law is generalized to anisotropic version in order to consider the effect of cohesi...
A fragment of Histidine rich protein II (HRP II 215-236) was investigated by 14N and 17O electric field gradient, EFG, tensor calculations using DFT. This study is intended to explore the differences between 310-helix and α-helix of HRPII both in the gas phase and in solution. To achieve the aims, the 17O and 14N NQR parameters of a fragment of HRPII (215-236) for both structures are calculated...
A number of algorithms based on the evolutionary processing have been proposed forcommunication networks backbone such as Genetic Algorithm (GA). However, there has beenlittle work on the SWARM optimization algorithms such as Particle Swarm Optimization(PSO) for backbone topology design. In this paper, the performance of PSO on GA isdiscussed and a new algorithm as PSOGA is proposed for the net...
We have calculated the fission fragment angular anisotropy for 16O + 232Th,12C + 236U , 11B + 237 Np , 14 N + 232 Th , 11B + 235U , 12C + 232Th systems with the saddle point statistical model and compared the fission fragment angular anisotropy for these systems. This comparison was done with two methods a) without neutron correction and b) with neutron correction. Also we studied normal and ...
A solid-state nuclear magnetic resonance (NMR) method for the site-resolved identification of the secondary structure of solid peptides and proteins is presented. This technique exploits the correlation between the backbone conformation and the CR chemical shift anisotropies (CSA) of proteins. The 13CR CSAs are measured under fast magic-angle-spinning using a new sequence of sixteen 180° pulses...
In some situations, dams need to be built on non-rock alluvial grounds such as sand and sand-silt deposits. Therefore, undrained behavior and strength of silty sands are of great importance. One of the critical factors in studying the behavior of sand-silt mixtures is inherent anisotropy, a natural soil characteristic that depends on its texture and is independent of the soil's initial stress s...
A set of TROSY-HNCO (tHNCO)-based 3D experiments is presented for measuring (15)N relaxation parameters in large, membrane-associated proteins, characterized by slow tumbling times and significant spectral overlap. Measurement of backbone (15)N R (1), R (1rho), (15)N-{(1)H} NOE, and (15)N CSA/dipolar cross correlation is demonstrated and applied to study the dynamic behavior of the homotetramer...
The interactions of (15)N-labeled amantadine, an antiinfluenza A drug, with DMPC bilayers were investigated by solid-state NMR and by a 12.6-ns molecular dynamics (MD) simulation. The drug was found to assume a single preferred orientation and location when incorporated in these bilayers. The experimental and MD computational results demonstrate that the long axis of amantadine is on average pa...
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