Paired optical-fiber switch for optical data-bus systems

A new type of optical switch, which is suitable for application to data paths with a loop bus-line configuration, is described. The switching action is obtained by moving a fiber directly. The insertion loss in the bypass mode is as low as 0.82 dB. Results of temperature, durability, and vibration tests are also described.

Deuterated oxytocins: the synthesis and biological properties of a crystalline analog of deamino-oxytocin deuterated in the 5-asparagine position

This paper describes the synthesis and biological activity of [5-L-asparagine-alpha,beta,beta-d(3)]-deamino-oxytocin. The model peptide S-benzyl-beta-mercaptopropionyl-L- asparaginyl-alpha,beta,beta-d(3)-glycinamide was also prepared to observe the effect of the conditions of peptide synthesis on the deuterium content. It was found that normal synthetic procedures could be used without a significant loss in the deuterium content.The [5-L-asparagine-alpha,beta,beta-d(3)]-deamino-oxytocin had, within experimental error, the same avian vasodepressor and oxytocic activities as deamino-oxytocin itself.