摘要:
A compound having the general formula (I) wherein R1 represents C1-C6 alkyl, etc., R2 represents hydrogen, C2-C7 alkanoyl, C7-C11 arylcarbonyl, the formula R4—(CH2)1—, etc., R3 represents C6-C10 aryl, etc., X1, X2, X3, X4 and X5 each independently represents hydrogen, halogen, etc., and n represents an integer of 0 to 2, pharmacologically acceptable salts thereof or prodrugs thereof. They have excellent inhibition of platelet activation, etc. and are useful as a prophylactic or therapeutic agents for diseases related to thrombus or embolus formation.
摘要:
It is intended to provide a method of conveniently screening a novel protein or a novel partial sequence protein having a blocking ability based on amino acid sequence data; and a protein achieving an improved blocking efficiency that can be expressed on a large scale in Escherichia coli. A method of screening a novel protein or a novel partial sequence protein having a blocking ability based on amino acid sequence data; a protein characterized by achieving an improved blocking efficiency owing to an amino acid sequence modification; and a method of utilizing the protein.
摘要:
The present invention provides an unbalanced input and balanced output type SAW filter capable of obtaining stop-band attenuation approximately equivalent to that of an unbalanced input and unbalanced output type SAW filter. IDTs (12) (13) are respectively disposed on each side of a middle IDT (11). A comb electrode (11c) of the middle IDT (11) is connected with an input terminal (In) and other comb electrode (11b) is grounded. A comb electrode (12c) of the IDT (12) and a comb electrode (13b) of the IDT (13) are respectively connected with output terminals (Out 1) and (Out 2), and other comb electrode (12b) of the IDT (12) and other comb electrode (13c) of the IDT (13) are connected to each other and grounded. Electrode fingers (11a), (12a), (13a) of the middle IDT (11) and the side IDT (12), (13) are so arranged that adjacent electrode fingers of the middle IDT and the IDT on one side make a connection between terminals and the other adjacent electrode fingers of the middle IDT and the IDT on other side make a connection between a terminal and a ground.
摘要:
A highly reliable refrigeration cycle having a residual refrigerant, which is designed that the refrigerating machine oil does not stagnate in the refrigeration cycle after flowing out from the compressor even if the refrigerating machine oil is weakly soluble in a refrigerant. Thus, the compressor may be prevented from the exhaustion of oil. In addition to that, even if the accumulator is removed from the cycle, a large amount of wet vapor suction into the compressor may also be avoided. A control section is provided for controlling saturated oil solubility in a liquid refrigerant in the refrigeration cycle. The control section includes a receiver and first and second flow regulators which are placed before and after, respectively, the receiver. A residual liquid refrigerant obtaining in the circulation of a refrigerant is reserved in the receiver at a high temperature so that the weakly soluble refrigerating machine oil is prevented from separating.
摘要:
An SAW device substrate and an SAW device having a larger value of K2 than conventional SAW device substrates can be obtained by using LiNbO3 represented by Eulerian angles of (18-30°, 80-100°, 35-75°) and determining the thickness H of a piezoelectric substrate and the pitch &lgr; of electrodes so that KH is at least 2.3 and at most 4.5. Alternatively, an Li2B4O7 layer is formed as a piezoelectric substrate on a surface of a glass layer to obtain an Li2B4O7/glass structured SAW device substrate. More preferably, such Li2B4O7 that is represented by Eulerian angles of (0-45°, 85-95°, 85-95°) is employed. Furthermore, the SAW device substrate is used to form an SAW device so that the KH parameter is about 0.5.
摘要:
An SAW device includes a glass substrate, an LiNbO3 (LN) substrate, and an electrode. When a pitch of the electrode is &lgr;, a thickness of the LN substrate is H, and K equals to 2&pgr;/&lgr;, a product of K and H is at least 0.5 and at most 1.0. Accordingly, an SAW device is obtained which is provided with high K2 and an enhanced temperature characteristic and which can be advantageously reduced in size.
摘要:
A heat pump system in which a by-passing passage is provided for connecting a high pressure segment of a primary refrigerant passage with a low pressure segment of the primary refrigerant passage, a secondary pressure reduction means is disposed in the by-passing passage to produce two phases of the refrigerant (gas-liquid state) and the pressure of the refrigerant is continuously detected by sensing saturated temperatures of the two phases both upstream and downstream of the secondary pressure reduction means for controlling the operation of the system.
摘要:
A refrigeration cycle system includes a compressor 1, a condenser 2, an expansion device 3 and an evaporator 5 connected in series with each other, and charged with a heteroazeotropic refrigerant mixture comprising R12 and R13. A fractionating vessel 6 and an electromagnetic valve 7 are provided in predetermined portions of the system for separating the R12 and R13 refrigerant components during an ordinary freezing mode and for mixing them during a rapid freezing mode.
摘要:
A heat pump employing a capillary tube as an expansion device is disclosed. The main throttle portion of the heat pump comprises a main capillary tube and a by-pass through which a portion of the refrigerant flows and cools the refrigerant flowing through the main capillary tube. A solenoid valve for controlling the flow of refrigerant through the main capillary tube is connected to the intake of the main capillary tube, and an electrical expansion valve is connected to the intake of the by-pass for controlling the flow therethrough. An auxiliary capillary tube for cooling and an auxiliary capillary tube for heating are connected in parallel with the main throttle portion, both capillary tubes having a higher resistance to flow than the main capillary tube. The auxiliary capillary tubes increase the range over which control of the flow of refrigerant can be achieved, allowing both a smaller flow of refrigerant during under minimum cooling or heating load as well as a larger flow of refrigerant under maximum cooling or heating load.
摘要:
In a record disc player, a pick-up arm is mounted for movement to and fro along a rectilinear path, a drive assembly is actuable for driving the arm along such path, first and second motors are alternatively operated, and a drive speed change-over mechanism selectively transmits driving torque from the operated one of the first and second motors to the drive assembly so that the pick-up arm can be stably driven at a relatively low speed by operation of one of the motors during the playing or reproducing of signals from a record disc, and high speed movement of the pick-up arm is effected upon operation of the other motor during lead-in and return operations of the player.