摘要:
Mitomycin derivatives having potent antitumor activity having the formula: ##STR1## wherein A is ON--or R.sub.4 N.dbd.N--[wherein R.sub.4 is selected from ##STR2## and optionally substituted heterocyclic groups (wherein R.sub.5 and R.sub.8 are each independently selected from hydrogen, lower alkyl and lower cycloalkyl; R.sub.6 is selected from hydrogen, halogen, hydroxy, lower alkoxy, amino and nitro; R.sub.7 is selected from lower alkyl and lower cycloalkyl; and X is selected from oxygen, sulphur and imino)];R.sub.1 and R.sub.2 are each independently selected from hydrogen, lower alkyl, lower cycloalkyl, optionally substituted aralkyl, optionally substituted alkanoyl, optionally substituted arylcarbonyl, optionally substituted alkanesulfonyl, arylsulfonyl and aralkylsulfonyl;R.sub.3 is hydrogen or carbamoyl;Y is hydrogen or methyl;Z is selected from hydrogen, methyl and acetyl;and is an .alpha. or .beta. bond.
摘要翻译:丝裂霉素衍生物具有有效的抗肿瘤活性,具有下式:其中A为ON-或R 4 N = N- [其中R 4为选自下列任意取代的杂环基团(其中R5和R8 各自独立地选自氢,低级烷基和低级环烷基; R6选自氢,卤素,羟基,低级烷氧基,氨基和硝基; R7选自低级烷基和低级环烷基; X选自氧,硫和亚氨基 )]; R 1和R 2各自独立地选自氢,低级烷基,低级环烷基,任选取代的芳烷基,任选取代的烷酰基,任选取代的芳基羰基,任选取代的烷基磺酰基,芳基磺酰基和芳烷基磺酰基; R3是氢或氨基甲酰基; Y是氢或甲基; Z选自氢,甲基和乙酰基; 并且是α或β键。
摘要:
Mitomycin derivatives having potent antitumour activity have the formula: ##STR1## wherein R represents lower alkyl, cycloalkyl or unsubstituted or substituted aralkyl;X represents hydrogen or carbamoyl;Y and Z each independently represents hydrogen or methyl;and represents an .alpha. or .beta. bond.
摘要:
Methods of treating movement disorders by administering an effective amount of one or more adenosine A2A receptor antagonists to a patient in need thereof and methods of decreasing the adverse effects of L-DOPA in patients receiving L-DOPA therapy in the treatment of Parkinson's disease. Also, methods and compositions for treating Parkinson's disease patients with sub-clinically effective doses of L-DOPA with an effective amount of one or more adenosine A2A receptor antagonists, optionally with a dopamine agonist and/or a COMT inhibitor and/or a MAO inhibitor.
摘要:
A remote control auto-focus camera system includes a camera body; a transmitter provided separately from the camera body, wherein the transmitter transmits a remote control signal; a focusing device, a photometering device and an exposure device, provided in the camera body; a photographing operation member, provided on the camera body, which is adapted to operate both the photometering device and the focusing device upon a first operation thereof and to operate the exposure device upon a second operation thereof; and a controller adapted to operate the photometering device and the exposure device in this order without operating the focusing device upon receipt of the remote control signal transmitted.
摘要:
A method is disclosed for performing data communication between a pair of circuits. The data communication is established by serially transmitting information which includes pulse signals. In executing the method, a reference time is determined as an instant of a first level change in a first direction of a pulse signal output from one of the circuits to the other. A judgement is made as to whether a first bit of data is a "1" or a "0" in accordance with a time period extending from the reference time to an instant of a subsequent level change in the first direction following the reference time. The instant of the subsequent level change in the first direction is determined as a reference time relative to the next bit of data in the pulse signal. The data of a predetermined number of bits is continuously transmitted by repeatedly establishing reference times and judging the value of a bit based on the time period which extends from the reference time to a subsequent level change.
摘要:
The oscillation wave signal generated during lens stop-down is amplified by an adjustable gain amplifier the gain of which is controlled in accordance with the peak value of the oscillation wave signal detected during a predetermined time period, to thereby maintain a substantially constant oscillation wave signal amplitude during lens stop-down.
摘要:
A photoelectric amplifier comprising a photodiode having an anode connected to a gate of a first FET and a cathode connected to a gate of a second FET, with the second FET having a source-gate interconnection so as to be self-biasing. The photodiode cathode is connected to a high impedance feedback loop, including an output transistor, which is connected back to the photodiode anode. In a preferred embodiment, further included is a feedback circuit gain controlling transistor having a base driven by the feedback circuit and a current electrode connected to the source of the first FET.
摘要:
A camera system includes a camera body including a photometering device and an external operating device, and a photographing lens which is detachably attached to the camera body, the photographing lens including an aperture setting device for selecting an auto aperture setting and at least one fixed aperture setting. A full-aperture photometering operation is performed when the aperture setting device is positioned at the auto aperture setting, and a stop-down photometering operation is performed in response to an operation of the external operating device when the aperture setting device is positioned at the fixed aperture setting.
摘要:
The present invention is directed to methods of treating movement disorders by administering an effective amount of one or more adenosine A2A receptor antagonists to a patient in need thereof. The present invention also provides methods of decreasing the adverse effects of L-DOPA in patients receiving L-DOPA therapy in the treatment of Parkinson's disease. The present invention further provides methods and compositions for treating Parkinson's disease patients with sub-clinically effective doses of L-DOPA by combining L-DOPA treatment with an effective amount of one or more adenosine A2A receptor antagonists (i.e., L-DOPA sparing effect). The present invention further provides methods of effective treatment of Parkinson's disease by co-administering at least one adenosine A2A receptor antagonist, L-DOPA and a dopamine agonist and/or a COMT inhibitor and/or a MAO inhibitor. The present invention further provides methods of prolonging effective treatment of Parkinson's disease by administering an adenosine A2A receptor antagonist singly or together with a dopamine agonist, and/or a COMT inhibitor, and/or a MAO inhibitor without prior or subsequent administration of L-DOPA, delaying or removing on-set of L-DOPA motor complication.
摘要:
A digital camera includes an image pickup device which converts incident light of an object image into an electrical signal during an exposure operation; a processor which captures the electrical signal, and thereafter generates a digital image from the electrical signal; a battery checking device which performs a battery check process for determining whether a battery voltage of the digital camera is lower than a predetermined voltage level; a controller which forcibly terminates the exposure operation when the battery checking device determines that the battery voltage drops below the predetermined voltage level during the exposure operation, and subsequently makes the processor start capturing the electrical signal in order to generate a backup digital image; and a warning device which warns a user that the exposure operation is forcibly terminated due to a shortage of the battery voltage and that the backup digital image is underexposed, in the case where the exposure is forcibly terminated.