摘要:
A fish is bred in a transparent basin, into which water to be tested is supplied. A light source and a television camera are arranged in such a manner that images of the fish are taken by the camera as a silhouette. From the thus obtained fish images, the frequency distribution of the gravity centers of the fish images in the direction of the depth of water are obtained. The abnormality of the behavior of the fish is detected by comparison of the obtained frequency distribution with a reference distribution provided in advance.
摘要:
An epoxy resin having hydroxyl groups is modified with .epsilon.-caprolactone by effecting the ring opening polymerization of .epsilon.-caprolactone onto the hydroxyl groups contained in the epoxy resin. The modified epoxy resin is further combined with a polycarboxylic anhydride and a promotor for curing, or polyamine to give a curable composition. The modified epoxy resin is further modified by reacting the epoxy groups therein with a primary or secondary amine. Both the modified resin and the compositions are useful as coating.
摘要:
A polyurethane comprises (a) organic diisocyanate units and (b) polycaprolactone polyol units having a narrow molecular weight distribution in which a ratio of the weight average molecular weight to the number average molecular weight is in the range of from 1.1 to 2.0 and the average molecular weight is 500 to 5,000, the units (a) and (b) being connected linearly through urethane linkages.
摘要:
In the production of carbon shaped articles such as fibers, films, etc. having high molecular orientation, anisotropy, strength, and modulus of elasticity through the steps of forming raw material pitch into desired shapes, infusibilization of the same followed by carbonization optionally graphitization, a raw material pitch having particular physical properties such as melt viscosity of 0.4 to 700 poises at a temperature range of 320.degree. to 480.degree. C, eminent structural anisotropy, and fluidity is used to produce such desired shaped product.
摘要:
Disclosed is a process for producing a carbapenem compound represented by Formula [1], which is characterized by allowing a base and a Lewis acid metal salt to coexist in the reaction of a compound represented by Formula [2] with a compound represented by Formula [3]. According to the process, a side-chain mercaptothiazole can be introduced into a β-lactam skeleton efficiently in the production of a β-lactam compound having an excellent antibacterial activity against a Gram-positive bacterium. [3] [2] [1] wherein R1 represents a lower alkyl group or the like; R2 represents hydrogen atom or the like; R3 represents a protective group for a carboxyl group; L represents an active ester of a hydroxy group; R4 represents hydrogen atom or the like; and R5 represents hydrogen atom or the like.
摘要:
It is intended to provide novel amino group-containing heterocyclic derivatives, which have a broad absorption zone in the visible region and are suitable for sensitizing dyes for photoelectric conversion having a high photoelectric conversion efficiency, and photoelectric conversion materials, photoelectric conversion electrodes and photoelectric conversion cells using the same. Namely, a heterocyclic derivative represented by the following general formula (I) and containing an amino group at the terminus: wherein R1, R2, R4 and R5 independently represent each a hydrogen atom or a monovalent organic group optionally having one or more substituent; R3 represents an anchor group capable of binding to an inorganic porous material showing semiconductor characteristics; X represents a divalent aromatic hydrocarbon group or a combination of two or more aromatic hydrocarbons being divalent or higher; Y represents a divalent aromatic heterocyclic group having a sulfur atom; Z represents a divalent aromatic heterocyclic group, a divalent aromatic hydrocarbon group, a divalent unsaturated hydrocarbon group or a combination thereof; and m is an integer of from 1 to 3.
摘要:
To provide a method for producing a toner, containing a milling step containing finely milling particles and classifying coarse particles by using at least a mill and a cyclone unit, and a classifying step containing classifying pulverized particles by using at least a classifier and a cyclone unit, wherein any of the pulverized particles and other particles, which are classified by the classifier in the classifying step and returned, are returned to the cyclone unit in the milling step, and a toner produced by the method for producing the toner.
摘要:
A mounting structure is provided for mounting a semiconductor device having an electrode on a mounting substrate having a conductive pad. A metallic bump electrically connects the electrode of the semiconductor device to the conductive pad. A first eutectic solder is used for soldering between the metallic bump and the electrode of the semiconductor device. A second eutectic solder is used for soldering between the metallic bump and the conductive pad of the substrate. A melting point of the metallic bump is higher than those of the eutectic solders and a resistance to fatigue of the first eutectic solder is higher than that of the second eutectic solder. The first eutectic solder is composed of an Sn component of 63% by mass, a Pb component of 34.3% by mass, an In component of 1% by mass, an Sb component of 0.7% by mass, and an Ag component of 1% by mass.
摘要:
In order to speed up and simplify automated learning of rules by a neural network making use of fuzzy logic, data from a system is analyzed by a teaching data creation means which groups the data into clusters and then selects a representative data item from each group for subsequent analysis. The selected data items are passed to a rule extraction means which investigates relationships between the data items, to derive rules, but eliminates rules which have only an insignificant effect on the system. The results are candidate rules which are stored in a first rule base. The candidate rules are then compared with rules in a second rule base to check for duplication and/or contradiction. Only those rules which are not duplicated and not contradictory are stored in the second rule base. Hence, when fuzzy inference is used to control the system on the basis of rules in the second rule base, only valid rules which provide a significant effect on the system are used.
摘要:
A process for preparing a graft polymer by subjecting a cyclic ester to ring-opening polymerization in the presence of a cellulose derivative in the presence of a ring-opening polymerization catalyst for the cyclic ester. The resulting graft polymer has high transparency, good film-formability and high solubility and can be suitably used as a novel polymer material.