摘要:
There is provided a metal-containing azo compound suitably used for an recording layer of an optical medium, which is represented by at least one of the following general formulae: wherein M(II) is a bivalent metal, X1 and X2 are each a residue that forms a monocyclic or polycyclic aromatic ring, Y1 and Y2 are each a residue that forms a nitrogen-containing aromatic heterocycle, and one residue is different from the other in at least one of a combination of X1 and X2, and a combination of Y1 and Y2; and there is also provided an optical recording medium of which recording layer comprises said metal-containing azo compound.
摘要:
A digital video cassette recorder reproduces signals which have been compressed to digital data and recorded in predetermined M tracks (M≧1) with helical scan in the unit of page consisting of N frames (N≧1). Further, position data have been added to the digital data on recording. On reproduction, the position data are detected to determine which reproduction position is reproduced, and a control signal to designate a field to be output is generated by observing the reproduction position during a frame period. A first storage device stores decoded data in the unit of N frames, while a second storage device delays the data a time of one field. By observing the reproduction situation with the position data, a memory controller controls reading from the first storage device according to the control signal, while a switch selects data to be output between data from the first storage device and data from the second storage device according to the control signal.
摘要:
A penam derivative of the general formula ##STR1## wherein R.sup.1 means hydrogen, halogen, amino or protected amino; R.sup.2 means hydrogen, halogen, lower alkoxy, lower acyl, lower alkyl, hydroxy- or protected hydroxy-substituted lower alkyl, hydroxy or protected hydroxy, or R.sup.1 and R.sup.2 may jointly represent oxo; R.sup.3 means hydrogen or a carboxy-protecting group; R.sup.4 means hydrogen; R.sup.5 means a group of the formula --CH.sub.2 Y where Y means halogen, --N.sub.3, --ONO.sub.2, --OR.sup.6, --OCOR.sup.6, --SCSOR.sup.6, --SCSN(R.sup.6).sub.2, --SR.sup.6, --SO.sub.2 R.sup.6, --NHR.sup.6, --N(R.sup.6).sub.2 or a substituted or unsubstituted nitrogen-containing heterocyclic group having a free valence on nitrogen; R.sup.6 means a lower alkyl, aryl or heterocyclic group which is substituted or unsubstituted; or R.sup.4 and R.sup.5 may jointly represent .dbd.CH.sub.2 ; n means 0, 1 or 2; provided, however, that where R.sup.4 and R.sup.5 jointly represent .dbd.CH.sub.2, n is not equal to 0.
摘要:
The present invention provides a lithium secondary battery which comprises a layer of vanadium pentoxide serving as the positive electrode active substance, a substance capable of occluding and releasing lithium ions and serving as the negative electrode active substance, and a polymer represented by the following formula (I) and having a lithium salt dissolved therein to serve as the electrolyte, wherein said formula is ##STR1## and wherein m is the average number of repeating ethyleneoxy units and is a real number of about 5 to about 25, and n is the average number of repetitions and is a real number in the range of 3.ltoreq.n.ltoreq.200000.The lithium secondary battery of the invention comprises two electrode active substances which have a high energy density and an electrolyte which is flame-retardant, nonflowable and safe, and is capable of retaining its characteristics even at low ambient temperatures of up to the ice point.
摘要:
A process for preparing a ketazine compound of the formula (1) from a ketone compound of the formula (2), ammonia and an oxidizing agent, wherein a solution containing the ketone compound of the formula (2) and ammonia is brought into contact with an aqueous solution of the oxidizing agent in a tubular reactor having a flow channel width of 2 to 10000 μm wherein R1 and R2 are the same or different and are each a C1-6 alkyl group, or R1 and R2 are combined with each other into a straight-chain C2-7 alkylene group wherein R1 and R2 are the same as above.
摘要:
A digital signal processing method comprising the steps of: (a) composing, a plurality of first encoded video data and a plurality of second encoded video data; (b) dividing, each of high quality M bits audio channel into audio data of upper L bits and audio data of lower M-L bits; (c) composing a plurality of first basic data and a plurality of second basic data, wherein each of the first basic data have respective audio data of upper “L” bits, and wherein the second basic data have respective audio data of audio data of lower “M-L”; and (d) transmitting the first basic data in a first data bus, and the second basic data in a second data bus.
摘要:
A magnetic recording and reproducing apparatus includes a reading and writing head for writing data on data tracks formed on a recording tape and reading the data therefrom to produce a first reproduction data. A simultaneous reproducing head is provided for reading a second production data from the data track just being written or read by the reading and writing head. A delay unit delays the first signal by a predetermined phase difference factor to arrange the first and second reproduction data on the same time base. A determiner is also provided for selecting either of said first and second reproduction signals whose signal quality is better than the other.
摘要:
A phthalocyanine compound of formula (1): ##STR1## wherein FIGS. 1 to 16 around the phthalocyanine skeleton indicate the positions of carbon atoms, an oxygen atom is bonded to the carbon atom with position 1 or 4, to the carbon with position 5 or 8, to the carbon atom with position 9 or 12, and to the carbon atom with position 13 or 16, R.sup.1 is a fluorine-atom substituted alkyl group, R.sup.2 is an unsubstituted phenyl group or an alkyl-group-substituted phenyl group, R.sup.3 is an unsubstituted alkyl group, a fluorine-atom substituted alkyl group or a hydrogen atom, and M represents VO or TiO.
摘要:
The present invention provides a thiazolinoazetidinone derivative represented by the formula ##STR1## wherein R.sup.1 is phenyl having or not having substituent(s), methyl having or not having substituent(s) or ##STR2## group, R.sup.3 being phenyl having or not having substituent(s), and R.sup.2 is a hydrogen atom or carboxylic acid protective group, and a process for preparing the same.The present invention further provides a process for preparing a 2-exo-methylenepenam derivative characterized by hydrolyzing the thiazoline ring of a thiazolinoazetidinone derivative of the above formula (1) to effect recyclization and obtain a 2-exo-methylenepenam derivative represented by the formula ##STR3## wherein R.sup.1 and R.sup.2 are as defined above.
摘要:
The present invention provides a process for preparing a 3-formylcephem derivative represented by the formula (2) ##STR1## which comprises oxidizing in the presence of oxygen a 3-halomethylcephem derivative represented by the formula (1) ##STR2## wherein R.sup.1 is amino group or protected amino group, R.sup.2 is hydrogen atom or a carboxylic acid protective group, X is halogen atom.