摘要:
The present invention relates to novel xanthine derivatives and pharmaceutically acceptable salts thereof, represented by Formula (I): ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3 independently represent hydrogen, lower alkyl, lower alkenyl, or lower alkynyl, R.sup.4 represents lower alkyl, or substituted or unsubstituted aryl, R.sup.5 and R.sup.6 independently represent hydrogen, lower alkyl, and lower alkoxy, or R.sup.5 and R.sup.6 are combined together to represent --O--(CH.sub.2)p--O-- (p is an integer of 1 to 3), n represents 0, 1, or 2, and m represents 1 or 2. The compounds of the present invention have an adenosine A.sub.2 receptor antagonistic activity, and are useful for the treatment or prevention of various kinds of diseases caused by hyperergasia of adenosine A.sub.2 receptors (for example, Parkinson's disease, senile dementia, depression, asthma, and osteoporosis).
摘要:
The polarization-maintaining optical fiber 10 of the present invention is designed so that a plurality of core portions 12a,12b which have a high refractive index is provided in parallel along a single diameter direction in the cross section of the optical fiber, these core portions 12a,12b cooperating to propagate a single fundamental mode. In the production method for the polarization-maintaining optical fiber of the present invention, a plurality of holes 22 are formed longitudinally in parallel along a single diameter direction of a glass rod 21 having a low refractive index which forms the cladding, glass rods 23 for core use having a high refractive index which form the core portions are inserted into these holes 22, heating to form a unitary body is carried out, creating a preform which is then drawn. Further, the rare-earth-doped polarization-maintaining optical fiber of the present invention uses a rare earth element to dope the optical waveguide portion of the polarization-maintaining optical fiber, and can be employed in a light amplifier or laser oscillator. Moreover, the polarization-maintaining optical fiber coupler of the present invention is formed by bringing two or more polarization maintaining optical fibers into contact, heating, fusing and elongating them, and heating the vicinity of the connection point before and after connection.
摘要:
The present invention relates to a therapeutic agent for Parkinson's disease containing as an active ingredient a polycyclic compound or a pharmaceutically acceptable salt thereof, the compound being represented by the following Formula (I): ##STR1## and A represents N or CR.sup.5 (in which R.sup.5 represents hydrogen, or substituted or unsubstituted lower alkyl), or represented by the following Formula (II): ##STR2## wherein Y, R.sup.6 and R.sup.8 are as defined herein and B and the adjacent two carbon atoms are combined to form a substituted or unsubstituted, partially saturated or unsaturated, monocyclic or bicyclic, carbocyclic or heterocyclic group.
摘要:
A taking lens for an underwater camera is constituted in the order from the side of a subject of a first lens group having no or slight refracting power, a second lens group having a positive refracting power, a third lens group having positive refracting power and a fourth lens group having negative refracting power. When focusing from the infinity to a closer distance, the first lens group is fixed to the image surface and the second and third lens groups are moved forward along the optical axis such that the distance between the second and third lens groups is changed.
摘要:
A superconducting magnet abnormality detection and protection apparatus is for early and surely detecting abnormality in superconducting coils mounted on a vehicle and protecting the superconducting coils. Magnetic flux detecting devices are mounted inside an outer vessel, which is a vacuum container of a superconducting magnet, so as to be opposite to the superconducting coil. Voltages induced in the magnetic flux detecting devices are detected. Voltage signals are led to a decision device. By monitoring the change of the voltage signals with time in a comparing judgment device, it is determined whether there is an abnormality. If there is an abnormality, an alarm indicator informs of an abnormal state, and a protection device takes protection measures such as interruption of the current of the superconducting magnet. Owing to such configuration, heat does not penetrate from the outside into the superconducting coil via instrumentation lead wires of the magnetic flux detecting devices. Magnitudes of vibration and displacement of the superconducting coil can be detected without contacting the superconducting coil. By always monitoring these signals, it becomes possible to early detect an abnormality in the superconducting coil and protect it.
摘要:
In a camera with a line of sight detecting device, the optical axes of an observation optical system, illuminating means and photoelectric converting means are disposed so as to differ from one another, whereby it never happens-that in the observation optical system, illuminating light creates ghost, and the calculation of the direction of line of sight can be accomplished effectively.
摘要:
The present invention relates to a thienoimidazopyridone derivative represented by Formula (I): ##STR1## wherein A and B independently represent --S-- or --CH.dbd., X-Y-Z represents --N(R.sup.2)--CH.dbd.N-- or --N.dbd.CH--N (R.sup.2)-- wherein R.sup.2 is hydrogen, lower alkyl or --CH(R.sup.3)--(CH.sub.2).sub.n --R.sup.4 wherein R.sup.4 is phenyl, n is 0 or 1, and R.sup.3 is hydrogen or lower alkyl, and R.sup.1 represents lower alkyl, or a pharmaceutically acceptable salt thereof.
摘要:
A xanthine derivative of the formula (I): ##STR1## wherein R.sup.1 represents substituted or unsubstituted lower alkyl, lower alkenyl, lower alkynyl, substituted or unsubstituted alicyclic alkyl, substituted or unsubstituted phenyl, or substituted or unsubstituted benzyl;R.sup.2 represents --(CH.sub.2).sub.m --X, wherein m is 2 or 3, and X is ##STR2## wherein a is NH, O or S, b and d are the same or different and are CH or N, and R.sup.3 is lower alkyl, substituted or unsubstituted alicyclic alkyl, or substituted or unsubstituted phenyl, or ##STR3## wherein e, g and h are the same or different and are CH or N, and R.sup.3 is the same as defined above;Q represents substituted or unsubstituted alicyclic alkyl, ##STR4## wherein R.sup.4 and R.sup.5 are the same or different and are substituted or unsubstituted alicyclic alkyl, ##STR5## wherein Y is single bond or alkylene; and n is 0 or 1, ##STR6## wherein K-M is --CH.sub.2 --CH.sub.2 --or --CH.dbd.CH--, and Y is the same as defined above, or ##STR7## wherein Y is the same as defined above; or a pharmacologically acceptable salt thereof is disclosed.This derivative has anti-dementia activity.
摘要:
Quinoline derivatives represented by formula (I): ##STR1## wherein A-B-D represents --C(COO--Y).dbd.CH--C(OR).dbd. (wherein Y represents 8-methyl-8-azabicyclo[3.2.1]oct-3-yl group and R represents alkyl) or --C(OH).dbd.C(COX--Y)--CH.dbd. (wherein X represents --O-- or --NH--; and Y has the same meaning as described above), or a pharmaceutically acceptable salt thereof, possess potent 5HT.sub.3 antagonizing activity and are useful as antiemetic agents.
摘要:
A lens for an underwater camera is comprised of a first lens unit having no refractive power or having weak refractive power, a second lens unit comprising a forward unit having negative refractive power and a rearward unit having positive refractive power, and having weak refractive power, a third lens unit having positive refractive power, and a fourth lens unit having negative refractive power, the first lens unit being fixed relative to the image plane, the second lens unit and the third lens unit being axially moved together on the optical axis toward the object side relative to the fourth lens unit.