Abrégé

Disclosed is a firefly luciferin analogue. More specifically disclosed are: a process for producing a substrate for luciferase which has a desired light-emission wavelength; and a firefly luciferin analogue produced by the process. The process for producing a substrate for luciferase which has a desired light-emission wavelength comprises: a step of producing a compound having such a structure that one of a group –OH and a group –NR1R2 [wherein R1 and R2 independently represent H or a C1-4 alkyl group] in luciferin or a luciferin analogue is substituted by the other group, for the purpose of shifting the light-emission wavelength thereof; a step of producing a compound having such a structure that the number (n) of double bonds in luciferin or a luciferin analogue is increased or decreased, for the purpose of shifting the light-emission wavelength thereof; and/or a step of producing a compound having such a structure that one of the above-mentioned double bond moiety and a benzene ring is substituted by the other one, for the purpose of shifting the light-emission wavelength thereof.

Classes IPC  ?

• C07D 277/12 - Composés hétérocycliques contenant des cycles thiazole-1, 3 ou thiazole-1, 3 hydrogénés non condensés avec d'autres cycles comportant une liaison double entre chaînons cycliques ou entre chaînon cyclique et chaînon non cyclique avec des hétéro-atomes ou des atomes de carbone comportant trois liaisons à des hétéro-atomes, avec au plus une liaison à un halogène, p. ex. radicaux ester ou nitrile, liés directement aux atomes de carbone du cycle
• C07D 277/66 - Benzothiazoles avec uniquement des radicaux hydrocarbonés ou des radicaux hydrocarbonés substitués liés en position 2 avec des cycles ou des systèmes cycliques aromatiques liés directement en position 2
• C09K 11/06 - Substances luminescentes, p. ex. électroluminescentes, chimiluminescentes contenant des substances organiques luminescentes

Abrégé

Provided is a novel method for measuring a system parameter of five-port junction used for a VNA (Vector Network Analyzer). The VNA is a device for measuring the incident wave and reflected wave of a DUT (Device Under Test), or the amplitude ratio of the incident wave to the transparent wave and the phase difference (S parameter: scattering matrix element) between the incident wave and the transparent wave thereof. As new findings, it has been found out that the S parameter can be represented by linear coupling using an H and a power difference ratio ({P(S)/P(0)}-1) in the five-port junction. The parameter (H) can be easily derived by calculation using at least three pieces of known standards, making it possible to reduce the amount of the calculation more than ever before.

Classes IPC  ?

• G01R 27/28 - Mesure de l'atténuation, du gain, du déphasage ou des caractéristiques qui en dérivent dans des réseaux électriques quadripoles, c.-à-d. des réseaux à double entréeMesure d'une réponse transitoire

Abrégé

A transmission device having a high transmission ratio, reduced in size, cost, and noise, and achieving low slip losses. The outer peripheral surfaces of a small-diameter rolling body (11) and auxiliary rolling body (13) are caused to be in contact with the outer peripheral surface of a large-diameter rolling body (12). The auxiliary rolling body (13) is placed on the substantially opposite side of the large-diameter rolling body (12) from the small-diameter rolling body (11). The inner peripheral surface of a pressure regulation ring (14) is caused to be contact with the outer peripheral surface of the small-diameter rolling body (11) and with the outer peripheral surface of the auxiliary rolling body (13), and the pressure regulation ring (14) is supported by these surfaces. When the small-diameter rolling body (11) is rotated, the pressure regulation ring (14) is rotated through the large-diameter rolling body (12) and the auxiliary rolling body (13). When a load is applied to the rotation of the large-diameter rolling body (12), the pressure regulation ring (14) is decentered. By this, the small-diameter rolling body (11) receives, from the pressure regulation ring (14), inward pressing force in the radial direction of the large-diameter rolling body (12).

Classes IPC  ?

• F16H 13/04 - Transmissions pour transmettre un mouvement rotatif à rapport de vitesse constant par friction entre des organes rotatifs sans organes à mouvement orbital avec billes ou rouleaux agissant de manière analogue