Recent high resolution images of spiral galaxies show wide varieties of features including nuclear spirals in the central parts. Some of the galaxies show grand-design nuclear spirals. The morphology of grand-design spirals can be further divided by the openness of the arms: tightly wound ones with winding angle of around 3π radian and open spirals with winding angle of around π radian. Based o...

Tubular membrane filtration is an important process when feed waters with a relatively high solids content are filtered. Such solids would normally have to be removed in a pre-treatment stage if spiral wound modules are to be used. High solids content occurs for example in high turbidity surface waters, wastewaters that contain fibrous materials or in waters where coagulants are added. Tubular ...

OBJECTIVE We examined whether surgically induced membrane defects elevate connexin 43 (Cx43) expression in the wound edge of the amniotic membrane (AM) and drives structural changes in collagen that affects healing after fetoscopic surgery. METHOD Cell morphology and collagen microstructure was investigated by scanning electron microscopy and second harmonic generation in fetal membranes take...

Here, we present a low-cost method to produce compact arrays using microporous materials and reagent jetting. Oligonucleotides are immobilized on membrane sheets as a series of lines. The membrane sheet is then rolled and bound, and the spiral structure is cut like a "jelly roll" to produce identical arrays. The spiral arrays behave much like larger formats using membranes, and hybridization de...

Recently, tape wound cores due to their excellent magnetic properties, are widely used in different types of transformers. Performance prediction of these transformers needs an accurate model with ability to determine flux distribution within the core and magnetic loss. Spiral structure of tape wound cores affects the flux distribution and always cause complication of analysis. In this paper, a...

The enzymatic ATP-hydrolyzing system in the stria vascularis and spiral ligament of the normal guinea pig was investigated. The existence of membrane ATPase, which is said to be closely related to the active transport of sodium and potassium across biological membranes, was established. The membrane ATPase in the present study was found to be similar in many respects to that found in various ti...