摘要:
A method for recovering platinum group elements comprises charging into a closed electric furnace and melting, together with flux components and a reducing agent, a platinum group element-containing substance to be processed and a copper source material containing copper oxide, sinking molten metal of primarily metallic copper below a molten slag layer of primarily oxides, and enriching the platinum group elements in the molten metal sunk below, and is characterized in that molten slag whose copper content has decreased to 3.0 wt % or less is discharged from the electric furnace and that the copper source material charged into the electric furnace is a granular copper source material of a grain diameter of not less than 0.1 mm and not greater than 10 mm.
摘要:
A printer includes a cutting apparatus with a shield that protects the cutting part of a cutter blade in the apparatus. A fixed blade is supported so that the fixed blade can be moved by pressure by a compression coil spring upon a fixed blade supporting frame attached to a body frame so that the fixed blade supporting frame can be opened or closed. A blade cover for protecting the cutting part of the fixed blade is fixed to the fixed blade supporting frame. When each fitting between fitting parts of the fixed blade and touching parts of a cutter frame is released in a state in which the fixed blade supporting frame is open, a part or the whole of the cutting part of the fixed blade is shielded by the shielding part of the blade cover.
摘要:
A printer and an ink tank for the printer capable of precisely detecting that ink has run out in a foam type ink tank. The ink chamber and an ink passage are formed in this order between the foam containing portion and the ink outlet of a foam-type ink tank. A first filter is installed between the foam containing portion and the ink passage and used to pass bubbles therethrough, whereas a second filter having a pore diameter smaller than the pore diameter of the first filter is installed between the ink chamber and the ink passage. A rectangular prism for detecting an ink end is formed on the side of the ink chamber. When the reflective surface of the rectangular prism is exposed from an ink liquid level as bubbles are gathered in the ink chamber with ink that is running short, light is reflected from the reflective surfaces and is detected by a reflection type optical sensor on the ink-jet printer side, so that the ink end can be determined. In a case where the capacity of the ink chamber is set sufficiently smaller, the ink end is detectable at a point of time when the ink has substantially run out.
摘要:
A two-dimensional photonic crystal slab waveguide is provided in which a line defect is formed, wherein a first width which is a distance between centers of nearest two lattice points located on both sides of the line defect is different from a second width which is a corresponding distance in a normal two-dimensional photonic crystal slab waveguide. In addition, a two-dimensional photonic crystal slab waveguide is provided in which low refractive index columns in a optical waveguide part are placed at positions shifted from normal positions in a normal two-dimensional photonic crystal slab.
摘要:
Disclosed is a method of treatment with a microwave plasma by maintaining a reduced pressure in a plasma-treating chamber for treatment with a plasma in which a substrate that is to be treated with a microwave plasma is contained, introducing a treating gas into the plasma-treating chamber and introducing microwaves into the plasma-treating chamber, wherein a metallic antenna is disposed in the plasma-treating chamber. The plasma is generated within a very short period of time maintaining stability after the microwaves are introduced into the plasma-treating chamber, and the treatment is accomplished maintaining stability.
摘要:
A ridge waveguide-type optical semiconductor device and a method of fabricating the same. The method of fabrication includes forming a first clad layer, a core layer, a second clad layer and a contact layer, in the stated order on a semiconductor substrate, forming a strip-shaped etching mask on the contact layer, removing the contact layer and the second clad layer selectively by etching, using the etching mask, until the core layer is exposed, so as to form a ridge including etched second clad layer, and forming a semiconductor layer by crystal growth, so as to form a mode control layer on the exposed surface of the core layer. The semiconductor device includes a semiconductor substrate, a first clad layer formed on the substrate, a core layer serving as a waveguide, on the first clad layer, and a strip-shaped second clad layer on the core layer. A mode control layer is formed on the core layer, and insulating layers are formed on the mode control layer, at opposite sides of the second clad layer. To confine light to waveguide, the mode control layer has a refractive index equal to or less than a refractive index of the core layer, and is larger than refractive indexes of the respective insulating layers.
摘要:
A phenothiazine, acridan, acridone oxime, acridone hydrazone and dibenzodiazepine derivative represented by formula (I) effective against diseases in which histamine, leukotrienes, etc. participate and effective in preventing or treating diseases in which chemical mediators such as histamine and leukotrienes participate, for example, asthma, allergic rhinitis, atopic dermatitis, urticaria, hay fever, gastrointestinal allergy and food allergy.
摘要:
In a clock reproducing circuit for use in a multilevel QAM demodulation circuit and including a clock phase error detecting circuit receiving a digital in-phase signal to generate a phase error signal, and a voltage controlled oscillator receiving the phase error signal through a loop filter, for generating a reproduced clock, the clock phase error detecting circuit comprises first and second delay circuits receiving the digital in-phase signal, the first delay circuit generating a ½-data period delayed signal, and the second delay circuit generating a one-data period delayed signal; an offset value generating circuit receiving the in-phase signal and the one-data period delayed signal for generating an offset value; a first subtracting circuit for subtracting the offset value from the ½-data period delayed signal to generate a first phase error signal; a second subtracting circuit for subtracting the one-data period delayed signal from the in-phase signal to generate a subtraction result signal; a sign inverting circuit for selectively inverting the sign of the first phase error signal on the basis of the subtraction result signal, to output a second phase error signal; a first discriminating circuit for comparing the subtraction result signal with a first threshold to output a first discrimination result signal; an addition circuit for adding the one-data period delayed signal to the in-phase signal to generate an addition result signal; a second discriminating circuit for comparing the addition result signal with a second threshold to output a second discrimination result signal; and a gate circuit controlled by the first and second discrimination result signals either to output the second phase error signal as the phase error signal or output a held signal as the phase error signal.
摘要:
The present invention relates to imidazoquinazoline derivatives represented by formula (I): ##STR1## wherein R.sup.1 represents hydrogen, substituted or unsubstituted lower alkyl, cycloalkyl, lower alkenyl, substituted or unsubstituted aralkyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroarylalkyl, or substituted or unsubstituted heteroaryl, R.sup.2 and R.sup.3 represent independently hydrogen, substituted or unsubstituted lower alkyl, substituted or unsubstituted aralkyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroarylalkyl, or substituted or unsubstituted heteroaryl, or R.sup.2 and R.sup.3 are combined to represent a heterocyclic group containing a nitrogen atom, R.sup.4 represents hydrogen or substituted or unsubstituted lower alkyl, X represents O or S, Y represents a single bond or O, n represents 0, 1, 2, or 3, and pharmaceutically acceptable salts thereof.
摘要:
Disclosed is a tricyclic compound represented by the formula (I): ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represents hydrogen, C1-6 alkyl, C1-6 alkoxy, C1-6 alkylthio, amino, C1-6 alkylamino, halogenated C1-6 alkyl, halogenated C1-6 alkoxy, halogen, nitro, cyano, carboxy, C1-6 alkoxycarbonyl, hydroxymethyl, CR.sup.9 R.sup.10 CO.sub.2 R.sup.11 (wherein each of R.sup.9, R.sup.10 and R.sup.11 independently represents hydrogen or C1-6 alkyl) or CONR.sup.12 R.sup.13 (wherein each of R.sup.12 and R.sup.13 independently represents hydrogen or C1-6-alkyl); R.sup.5 represents hydrogen or C1-6 alkyl; each of R.sup.6, R.sup.7 and R.sup.8 independently represents hydrogen, C1-6 alkyl, hydroxy, C1-6 alkoxy, C1-6 alkanoyloxy, C1-6 alkylthio, thiocyanato or halogen; X represents CH or N; Y.sup.1 -Y.sup.2 represents CH.sub.2 -O, CH.sub.2 -S(O).sub.n, (wherein n represents 0, 1, or 2), CH.sub.2 CH.sub.2, CH.dbd.CH or CON(R.sup.14) (wherein R.sup.14 represents hydrogen or C1-6 alkyl) and Z represents oxygen or sulfur, or a pharmaceutically acceptable salt thereof. The compound possesses an acyl coenzyme A: cholesterol acyltransferase-inhibiting activity, and thus are expected to have preventive and therapeutic effects on hyperlipemia and arteriosclerosis.
摘要翻译:公开了由式(I)表示的三环化合物:其中R 1,R 2,R 3和R 4各自独立地表示氢,C 1-6烷基,C 1-6烷氧基,C 1-6烷硫基,氨基, C 1-6烷基氨基,卤代C 1-6烷基,卤代C 1-6烷氧基,卤素,硝基,氰基,羧基,C 1-6烷氧基羰基,羟甲基,CR 9 R 10 CO 2 R 11(其中R 9,R 10和R 11各自独立地表示氢或C 1-6烷基 )或CONR 12 R 13(其中R 12和R 13各自独立地表示氢或C 1-6 - 烷基); R5表示氢或C1-6烷基; R 6,R 7和R 8各自独立地表示氢,C 1-6烷基,羟基,C 1-6烷氧基,C 1-6烷酰氧基,C 1-6烷硫基,氰硫基或卤素; X表示CH或N; Y1-Y2表示CH2-O,CH2-S(O)n,(其中n表示0,1或2),CH2CH2,CH = CH或CON(R14)(其中R14表示氢或C1-6烷基) Z表示氧或硫,或其药学上可接受的盐。 该化合物具有酰基辅酶A:胆固醇酰基转移酶抑制活性,因此预期对高脂血症和动脉硬化具有预防和治疗作用。