摘要:
A refractory is disclosed which contains integrally sintered magnesia particles forming the skeleton of the refractory and a mineral phase of magnesium orthotitanate (Mg.sub.2 TiO.sub.4) formed between the magnesia particles, thus giving an increased erosion resistance. Preferably, the refractory comprises coarse magnesia particles having an average particle diameter of at least 1 mm or a mixture of coarse magnesia particles having an average particle diameter of at least 1 mm and medium magnesia particles having an average particle diameter of 1 to 0.15 mm and 5 to 50 wt. % of magnesium orthotitanate intervening between the magnesia particles. The refractory not only has an excellent durability in a basic atmosphere, but also has a high strength because of combination of the coarse or medium magnesia particles so that it does not tend to deform and has a high durability against thermal shock.
摘要:
The present invention relates to novel pyrimidine derivatives of the general formula ##STR1## wherein R.sup.1 represents a pyrazolyl, imidazolyl, or triazolyl group, R.sup.2 represents hydrogen atom or lower alkyl group, R.sup.3 represents a halo, amino, lower alkoxy, pyrazolyl, imidazolyl, triazolyl, piperidinyl, or aryloxy group, one of X or Y represents N and the other of X or Y represents CH, and the salts thereof.These derivatives may be used in the treatment of peptic ulcer disease.
摘要:
Gastric lesions induced by anti-inflammatory agents such as aspirin and indomethacin are prevented by the administration of amino acids. An anti-inflammatory composition comprising an anti-inflammatory agent and an amino acid is useful in the treatment of inflammation without inducing the gastric lesions.
摘要:
An optical transceiver module that is capable of being inserted into and removed from a cage includes a housing that houses a photoelectric conversion element, the housing having a guiding section formed along a front-rear direction, an operating lever that has an operating section and a lever-side contact section, the operating lever being attached to the housing in a rotatable manner about an axis of rotation; and a slider that has a wedge section that engages with a latching section provided to the cage, and a slider-side contact section that comes into contact with the lever-side contact section, the slider being guided in the front-rear direction by the guiding section, the lever-side contact section being located opposite the operating section with respect to the axis of rotation, and as the operating section is pushed rearward, the lever-side contact section pushes the slider-side contact section forward and the slider moves forward to a position where the wedge section is unlatched from the latching section.
摘要:
The present invention provides a magnesia-spinel refractory in which corrosion resistance and slag penetration resistance are significantly improved. The magnesia-spinel refractory is obtained by mixing magnesia granulated powder having a particle diameter of 10 to 150 &mgr;m and alumina powder having a particle diameter of 0.1 to 5 &mgr;m, molding the resultant mixture, and then burning the molded product to form a dense and strong combined structure of periclase and spinel. The mixture of magnesia and alumina contains powders of both components, or a powder of one of the components and a granulated powder of the other component. It is preferable to use a spray dryer method as granulating means, and a hydrostatic pressing method as molding means. These mixtures are used for producing magnesia-spinel protecting tube and crucible, bricks for copper smelting and converting furnaces, and magnesia-spinel protecting tube and crucible for copper smelting and converting furnace slag. In this case, the hydrostatic pressing method is used.
摘要:
Disclosed are novel imidazole derivatives having the formula: ##STR1## wherein R.sup.1 and R.sup.2 are H, alkyl, cycloalkyl, aryl, aralkyl or halogen-substituted alkyl, or R.sup.1 and R.sup.2 are combined to form a heterocyclic ring; R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are H, halogen, alkoxy, aralkyloxy, alkyl, alkoxycarbonyl, nitro, amino, acyl, fluorine substituted-alkyl, or fluorine substituted-alkoxy, or R.sup.3 is combined with R.sup.2 to form a heterocyclic ring; R.sup.8 and R.sup.9 are H, halogen, alkoxy, alkyl, alkoxycarbonyl, nitro, amino, acyl, fluorine substituted-alkyl, fluorine substituted-alkoxy, or aryl group which may have a substituent, or R.sup.8 and R.sup.9 are combined to form an alicyclic ring; R.sup.7 is, where R.sup.8 and R.sup.9 are not combined, H, and, where R.sup.8 and R.sup.9 are combined, H, alkyl which may have a substituent, aryl which may have a substituent, arylcarbonyl which may have a substituent, or a sulfur-containing heterocyclic group; and n is 0 or 1. The new imidazole derivatives are effective particularly as anti-ulcer agents.
摘要:
Disclosed are novel imidazole derivatives having the formula: ##STR1## wherein R.sup.1 and R.sup.2 are H, alkyl, cycloalkyl, aryl, aralkyl or halogen-substituted alkyl, or R.sup.1 and R.sup.2 are combined to form a heterocyclic ring; R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are H, halogen, alkoxy, aralkyloxy, alkyl, alkoxycarbonyl, nitro, amino, acyl, fluorine substituted-alkyl, or fluorine substituted-alkoxy, or R.sup.3 is combined with R.sup.2 to form a heterocyclic ring; R.sup.8 and R.sup.9 are H, halogen, alkoxy, alkyl, alkoxycarbonyl, nitro, amino, acyl, fluorine substituted-alkyl, fluorine substituted-alkoxy, or aryl group which may have a substituent, or R.sup.8 and R.sup.9 are combined to form an alicyclic ring; R.sup.7 is, where R.sup.8 and R.sup.9 are not combined, H, and, where R.sup.8 and R.sup.9 are combined, H, alkyl which may have a substituent, aryl which may have a substituent, arylcarbonyl which may have a substituent, or a sulfur-containing heterocyclic group; and n is 0 or 1. The new imidazole derivatives are effective particularly as anti-ulcer agents.
摘要:
An evaporative pattern casting method is taught which does not reduce accuracy of an evaporative pattern.The evaporative pattern casting method comprises a part manufacturing process (S2), an assembly process (S4), a sand mold manufacturing process (S6), a molten metal pouring process (S8) and a sand removal process (S12). In the part manufacturing process, the evaporative pattern is manufactured as a plurality of separate parts. In the assembly process, the parts are assembled on a work plane. In the sand mold manufacturing process, the evaporative pattern is covered with sand to form a sand mold without moving the assembled evaporative pattern from the work plane. In the molten metal pouring process, molten metal is poured into the sand mold. In the sand removal process, the sand is removed after the molten metal has solidified. According to this casting method, the sand mold is formed without moving the assembled evaporative pattern from the work plane, and consequently the accuracy of the dimensions at the time of assembly can be maintained.
摘要:
An evaporative pattern casting method is taught which does not reduce accuracy of an evaporative pattern.The evaporative pattern casting method comprises a part manufacturing process (S2), an assembly process (S4), a sand mold manufacturing process (S6), a molten metal pouring process (S8) and a sand removal process (S12). In the part manufacturing process, the evaporative pattern is manufactured as a plurality of separate parts. In the assembly process, the parts are assembled on a work plane. In the sand mold manufacturing process, the evaporative pattern is covered with sand to form a sand mold without moving the assembled evaporative pattern from the work plane. In the molten metal pouring process, molten metal is poured into the sand mold. In the sand removal process, the sand is removed after the molten metal has solidified. According to this casting method, the sand mold is formed without moving the assembled evaporative pattern from the work plane, and consequently the accuracy of the dimensions at the time of assembly can be maintained.
摘要:
A method of protecting gastrointestinal tract in a mammal from the untoward, non-gastric-acid-induced effects of exposure to gastrointestinally injuruous agents, which comprises administering orally to said mammal a non-antisecretory amount of a benzimidazole derivative having the formula (I): ##STR1## wherein R.sup.1 is the hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group, phenyl group or aralkyl group, R.sup.2 is the hydrogen atom or a lower alkyl group, or R.sup.1 and R.sup.2 together with the adjacent nitrogen atom forms a ring, and each of R.sup.3 and R.sup.4 independently is the hydrogen atom, a halogen atom, the trifluoromethyl group, a lower alkyl group, a lower alkoxy group, a lower alkoxycarbonyl group or an amino group.