In this review article, I report our recent studies on spectroscopic visualizations of macroscopic helical alignments of nanofibers in vortex flows. Our designed supramolecular nanofibers, formed through self-assemblies of dye molecules, helically align in torsional flows of a vortex generated by mechanical rotary stirring of the sample solutions. The nanofiber, formed through bundling of linea...

Electron microscopy (EM), combined with image processing, has become an increasingly powerful tool for structural biology. Advances in cryopreservation and imaging, along with increasingly sophisticated computational tools for image processing, allow three-dimensional (3D) structure determination of macromolecules or macromolecular assemblies trapped in native states (1, 2). Structures from non...

The effect of the design on heat transfer is numerically investigated by using wavy inner tube in a double-pipe exchanger. A was used to give turbulent fluid along double In numerical study, ANSYS 12.0 Fluent code program used, and basic protection equations were solved for steady-state, 3-D flow conditions. study examined at Reynolds numbers ranging from 2700-5300. obtained results compared wi...

this paper investigates axial compression process of multi-layered tubes with circular cross-section under the axial loading in the quasi-static condition using experimental method. some specimens are prepared in seven different groups, namely; empty carbon/epoxy composite tubes, solid carbon/epoxy composite rods, empty copper tubes, composite tubes with silicon sealant filler, concentrically s...