Abstract:
The present invention relates to novel cephalosporin derivatives, processes for preparing thereof, compositions for preventing and/or treating infectious diseases which comprise the novel cephalosporin derivatives as active components, and the intermediate compounds in the synthesis of cephalosporin derivatives and processes for producing thereof.The present invention is based on the selection of groups containing a condensed heterocyclic ring, particularly a triazolopyrimidine ring or a thiadiazolopyrimidine ring, as substituents at the 3-position of the cephem skeleton, and of groups containing a catechol moiety, particularly a catechol carboxymethyloxyimino moiety or a catechol carboxyimino moiety, as substituents at the 7-position of the cephem skeleton.The compounds of the present invention containing the aforementioned substituents have a strong antibacterial activity against Gram-negative bacteria and also against Gram-positive bacteria including methicillin-resistant Staphylococcus aureus. These compounds are extremely useful for the treatment of infectious diseases.
Abstract:
A carbon fiber cord for rubber reinforcement, comprising (A) a carbon fiber bundle comprising carbon fibers selected from the group consisting of carbon fibers having coated thereon from 0.1 to 1% by weight of at least one epoxy resin composition and carbon fibers having coated thereon from 0.5 to 15% by weight of a metal selected from the group consisting of copper, nickel, zinc, and cobalt, and (B) a phenol-formalin-rubber latex type adhesive for rubber impregnated to said carbon fiber bundle in an amount of from 10 to 30% by weight, and said epoxy resin is selected from the group consisting of(1) a composition comprising an epoxy resin and from 5 to 20% by weight of a compound represented by formula (I) ##STR1## wherein A represents --C.sub.2 H.sub.4 O).sub.l or --C.sub.2 H.sub.4 O).sub.n (C.sub.3 H.sub.6 O).sub.m, wherein l and n each represents an integrer of from 18 to 50, m represents an integer of from 1 to 50, and n/m is from 1 to 25,(2) a composition comprising a urethane-modified epoxy resin represented by formula ##STR2## wherein A represents an aliphatic or aromatic hydrocarbon group, m and n each represents 0 or an interger of 1 or more, and the sum of n and m is from 2 to 10, and(3) a composition comprising polybutadiene epoxide resin containing a glycidyl group and having an epoxy equivalent of from 1,000 to 2,000, which is represented by formula (III) ##STR3## wherein n represents an integer of from 4 to 22, and l/m is from 2.3 to 9.
Abstract translation:一种用于橡胶增强物的碳纤维帘线,包括(A)碳纤维束,其包含碳纤维,所述碳纤维选自由0.1至1重量%的至少一种环氧树脂组合物涂覆的碳纤维和其上涂覆有碳纤维 0.5至15重量%的选自铜,镍,锌和钴的金属,和(B)用于橡胶的苯酚 - 甲醛 - 橡胶胶乳型粘合剂,其浸渍到所述碳纤维束中, 10〜30重量%,所述环氧树脂选自(1)包含环氧树脂的组合物和5至20重量%的由式(I)表示的化合物(I) )其中A表示-C 2 H 4 O)1或-C 2 H 4 O)n(C 3 H 6 O)m,其中l和n各自表示18至50的整数,m表示1至50的整数,n / m为1至 25,(2)包含由式表示的氨基甲酸酯改性的环氧树脂的组合物 (II)其中A表示脂族或芳族烃基,m和n各自表示0或1以上的整数,n和m的总和为2〜10,(3)包含聚丁二烯环氧树脂 (III)表示的含有缩水甘油基和环氧当量为1,000〜2,000的化合物,其中n表示4〜22的整数,l / m为2.3 到9。
Abstract:
A system structure recognition method for a multiloop transmission system for recognizing the system structure of a transmission system consisting of a plurality of loop transmission lines, a plurality of devices connected with each of a plurality of transmission control devices disposed on each of the loop transmission lines, and relay terminals connecting the loop transmission lines with each other includes a step of sending the message to the loop transmission lines after having added an address to the data portion of the message, when a message for system recognition reaches each of the transmission control devices from the loop transmission lines and a step, in which, when the message for system recognition reaches one of the relay terminals from one of the loop transmission lines, the message is sent to the other loop transmission line after having inserted a flag representing a relay of the message between different loops in the data portion of the message for system recognition.
Abstract:
A ROM device includes a plurality of memory cells each storing one of three states, a cell voltage generating circuit for providing a cell voltage corresponding to the state stored in a selected one of the memory cells, and a reference cell for providing a reference voltage which is substantially the same as the cell voltage provided by a memory cell storing an intermediate state of the three states. The ROM also includes a comparator circuit for generating a logical output signal based on the result of a comparison between the cell voltage and the reference voltage.
Abstract:
In a distributed processing system where a series of processes are carried out by distributed processors connected through a network without provision of a control processor which controls the overall system, an arbitrary processor generates test information and the processors, each having a memory for storing a program to be tested, decide whether or not the program is to be test-run in accordance with the test information and, if test-run is carried out, send out the result of the test-run program into the network when necessary.
Abstract:
A die assembly for use in a general type mechanical press machine has opposite upper and lower dies adapted to be fitted in upper and lower die sets, respectively, so as to be slidable freely by a predetermined stroke, and a differential mechanism interposed between the upper and lower dies so as to transmit a predetermined rate of displacement to the lower die in accordance with the movement or displacement of the upper die set. The differential mechanism comprises a rack and pinion mechanism or linkage having two pair of link mechanisms.
Abstract:
A plural-bit-per-cell read-only memory constituted by a memory cell array (1), reference cell array (2A, 2B, 2C), and related circuits. In the memory cell array (1), a low resistance ground line (17) crossing the diffusion layer in parallel with the bit lines (15) is arranged for each predetermined length of the diffusion layer, which is used as a common grounding route to the low resistance ground line (17). The reference cell array (2A) includes a plurality of reference cells (211, 212, . . . 21n), and the arrangement of the reference cells (211, 212, . . . 21n) corresponds to the arrangement of the plural-bit memory cells (14) within the predetermined length of the diffusion layer in the memory cells array (1). The transconductance of the reference cells is predetermined in correspondence with the reference voltage values (REF1, REF2, REF3). A column address signal which selects a plural-bit memory cell (14) also selects one of the reference cells (211, 212, . . . 21n) which corresponds to the plural-bit memory cell (14) selected by the column address signal. Thus, in generation of reference voltages (REF1, REF2, REF3), the reference voltage value is corrected taking into consideration the influence of resistance of the diffusion layer according to the location of the plural-bit memory cell (14) selected by the column address signal.
Abstract:
A pneumatic tire having an excellent cut resistance is disclosed, which comprises an annular crown portion constituting a tread, a pair of side portions supporting said crown portion, a pair of bead portions located at each foot of said side portions for fitting to a rim, a carcass layer composed of at least one rubberized cord ply toroidally extending between said bead portions and a liner layer disposed indise and adjacent to said carcass layer.In the tire according to the invention, a fault surface having an extremely low adhesion which intercepts the crack growth from the outside of the tire is further arranged in said liner layer at at least a part of a region extending between said bead portions.In the other tire according to the invention, for intercepting the crack growth from the outside of the tire, a low modulus middle rubber layer composed of rubber having a modulus lower than that of the adjoining rubber is further arranged in the tire at at least a part of a region extending between said bead portions.The growth of the cut damage especially given to the side portions of the tire is prevented by the fault surface or the low modulus middle rubber layer.
Abstract:
A buffer circuit for driving a C-MOS inverter, including a first inverter and a second inverter for driving a p-MOS transistor, respectively, and an n-MOS transistor in the C-MOS inverter. Each of the inverters includes at least three transistors connected in series. At least one of the three transistors in each inverter is driven by a delay circuit so that during a transition period of the C-MOS inverter, simultaneous conduction of current through the C-MOS inverter is prevented.
Abstract:
A programmable sequence controller using a technique called microprogramming, including a microprogram memory having a plurality of memory sections each storing a set of microinstructions corresponding to the command word of a sequence instruction. The operation code of the sequence instruction is applied to the upper bits of the microprogram memory so as to select one of the memory sections. The remaining bits are determined by a counter and the ON/OFF state of an I/O element so that one of the microinstructions is read out from the selected memory section.