We report the results of x-ray-scattering studies of individual helical ribbons formed in multicomponent solutions of cholesterol solubilized by various surfactants. The solutions were chemically defined lipid concentrate (CDLC) and model bile. In these and many analogous multicomponent surfactant-cholesterol solutions, helical ribbons of two well defined pitch angles, namely 11 degrees and 54 ...

We study the helical edge states of a two-dimensional topological insulator without axial spin symmetry due to the Rashba spin-orbit interaction. Lack of axial spin symmetry can lead to so-called generic helical edge states, which have energy-dependent spin orientation. This opens the possibility of inelastic backscattering and thereby nonquantized transport. Here we find analytically the new d...

The neurofibrillary tangles that occur in the brain in cases of senile dementia of the Alzheimer type contain a distinctive type of filament, the paired helical filament (PHF). We have developed a method for isolating the tangles postmortem in sufficient yield for structural study of PHFs by electron microscopy of negatively stained and shadowed preparations. This material shows the characteris...

In this paper, the transfer function (TF) of a passive waveguide-based terahertz (THz) pulse shaper is calculated using time domain data provided by full-wave simulation structure. The fractional order TF determined based on response resulting from an arbitrary excitation proposed shaper. Full-wave electromagnetic numerical analyses are applied to attain time-domain output helical gold-ribbon d...

Abstract The vast majority of solid–liquid mixing studies have focused on high Reynolds number applications with configurations and impeller geometries adapted to this type regime. However, the particles in a viscous fluid is an essential element many contemporary industries. We used computational dynamics‐discrete method model previously developed our group investigate close‐clearance impeller...

Pertumbuhan penduduk yang sangat cepat menyebabkan terjadinya peningkatan akan kebutuhan energi berupa bahan bakar. Bioetanol gel merupakan salah satu bakar alternatif berpotensi untuk dikembangkan. Dalam merancang pabrik bietanol gel, terdapat beberapa aspek penting diantaranya adalah perhitungan kapasitas produksi dan pertimbangan terhadap berbagai jenis proses pembuatan bioetanol agar didapa...

Mixing applications operating in the laminar regime are used numerous industrial processes pharmaceutical, chemical, and food industries. The aim of this paper is to introduce a numerical model adapted solid-liquid mixing situations stirred tanks. method presented herein based on Euler-Lagrange approach using CFD-DEM method. This couples computational fluid dynamics (CFD) for with discrete elem...