Hydrogen production is a topical issue in an energy scenario where decarbonization priority, especially with reference to the transport sector that has great weight on global emissions. Starting from this consideration, GIF (Generation-IV International Forum) investigated possibility produce hydrogen by nuclear energy. The “classic” strategy based use of as source for electrolysis; but medium-l...

The study on fluid-induced vibration of helical elastic tube bundles (HETBs) to enhance heat transfer is great significance in industrial production and energy utilization. response the property a HETB exchanger were analyzed by using two-way fluid–solid coupling method. frequency, displacement amplitude, coefficient computed while considering varying entrance velocities helix diameters. Numeri...

ϕRSL1 jumbo phage belongs to a new class of viruses within the Myoviridae family. Here, we report its three-dimensional structure determined by electron cryo microscopy. The icosahedral capsid, the tail helical portion, and the complete tail appendage were reconstructed separately to resolutions of 9 Å, 9 Å, and 28 Å, respectively. The head is rather complex and formed by at least five differen...

We present an approach for designing self-assembled nanostructures from naturally occurring building block segments obtained from native protein structures. We focus on structural motifs from left-handed beta-helical proteins. We selected 17 motifs. Copies of each of the motifs are stacked one atop the other. The obtained structures were simulated for long periods by using Molecular Dynamics to...

Benign prostatic hyperplasia (BPH) remains an incompletely understood disease, mostly striking old men. In fact, 40% of men over 50 show evidence of BPH [1]. The main consequence of BPH is an uncontrolled growth of prostate epithelial and stromal tissues. Eventually, this may lead to an acute urinary retention (AUR) [2], calling for an emergency treatment. Today, the first line treatment consis...

A practical theoretical framework is presented for designing and classifying minimally strained nucleic acid nanotubes. The structures are based on the double crossover motif where each double-helical domain is connected to each of its neighbors via two or more Holliday-junction-like reciprocal exchanges, such that each domain is parallel to the main tube axis. Modeling is based on a five-param...

Two examples of the use of differential geometry in plasma physics are given: The first is the computation and solution of the constraint equations obtained from the Riemann metric isometry of the twisted flux tube. In this case a constraint between the Frenet torsion and curvature is obtained for inhomogeneous helical magnetic flux tube axis. In the second one, geometrical and topological cons...

The most important reason for the design of curved tubes is increasing the heat transfer between the fluid and the wall which has provided many applications in various industries such as air conditioning, micro-electric, heat exchangers and etc. The aim of this study is numerical investigation of nano fluids flow in spiral tubes with injection of base fluid in different Reynolds numbers. Accord...

Dual (or sometimes multiple) flux tubes (DFTs) have been observed in the core of sawtoothing KSTAR tokamak plasmas with electron cyclotron resonance heating. The time evolution of the flux tubes visualized by a 2D electron cyclotron emission imaging diagnostic typically consists of four distinctive phases: (1) growth of one flux tube out of multiple small flux tubes during the initial buildup p...