Controlling of 6 nm sized and 10 nm pitched dot arrays ordered along narrow guide lines using PS-PDMS self-assembly.

We have studied graphoepitaxy to make nanodots or nanolines ordered along electron beam (EB)-drawn resist guide using block copolymers (BCPs) of polystyrene-polydimethylsiloxane (PS-PDMS). We found out that the number n of ordered molecular dot arrays in the line gap increases stepwise with the gap between guide lines. The n self-assembled dot arrays were ordered in a gap between n and n+1 times the mean PDMS pitch and self-assembled with no guide pattern.

Involvement of Bag6 and the TRC pathway in proteasome assembly.

The 26S proteasome has an elaborate structure, consisting of 33 different subunits that form the 20S core particle capped by the 19S regulatory particle on either end. Several chaperones that are dedicated to the accurate assembly of this protease complex have been identified, but the mechanisms underlying proteasome biogenesis remain unexplored so far. Here we report that core particle assembly becomes less efficient if the TRC pathway, which mediates insertion of tail-anchored proteins, is defective.

Production of a positron microprobe using a transmission remoderator.

A production method for a positron microprobe using a beta+-decay radioisotope (22Na) source has been investigated. When a magnetically guided positron beam was extracted from the magnetic field, the combination of an extraction coil and a magnetic lens enabled us to focus the positron beam by a factor of 10 and to achieve a high transport efficiency (71%). A 150-nm-thick Ni(100) thin film was mounted at the focal point of the magnetic lens and was used as a remoderator for brightness enhancement in a transmission geometry.