No abstract

Bis(1,2-diphenyl-1,2-ethylenedithiolato)nickel(0) (1a) reacts with quadricyclane (Q) to give a 1:1 adduct which has the same structure as that of the adduct between 1a and norbornadiene (NBD). Q reacts with 1a much faster than NBD. The adduct is thermally stable but photosensitive to dissociate into 1a and NBD.

ABSTRACT; The honeycomb catalysts were used for the de-NOx of diesel engine. The flow uniformity of exhausted gas in the de-NOx reactor effectuates the high de-NOx efficiency and the long life time of honeycomb catalysts. Therefore, it is important to make clear the flow distribution of exhausted gas from the diesel engine. In this report, the flow of inside the de-NOx reactor was studied experimentally by using the smoke method and the smoke wire method for visualization.A baffle was equipped in our deNOx reactor to regulate the flow distribution in honeycombs. As a result , it was made clear that the vortex produced after the baffle had an important roll for flow distribution and mixing.

We studied simple retractable monopole antenna for cellular portable phones using computational and experimental analysis. This antenna configuration uses an antenna element, consisting of a straight conducting wire in both the extended and retracted positions, by changing the feed point on the element. We found that the optimization of some parameters, such as the element length and the feed point, enable the input impedance of the retracted position to be adjusted to that of the extended position. This characteristic guarantees a low mismatch loss in both the extended and retracted positions. We also discuss the effect of the terminal height and the gap width between the element and the terminal.The numerical simulations and experiments using a simplified model prove that this antenna configuration has an excellent return loss characteristic above 20 dB, even in the retracted position, and that also it has a high efficiency of 85% in the extended position including the matching circuit loss.Since this antenna configuration also provides a spatially efficient and mechanically durable structure, we used it in a cellular portable phone.

No abstract