摘要:
A postprandial hyperglycemia-improving agent, the agent is highly safe and exhibits excellent effects of inhibiting the postprandial increase of blood glucose. The postprandial hyperglycemia-improving agent comprises a cycloartenol or a derivative thereof as an active ingredient.
摘要:
To provide an ultrasound breast diagnostic system suitable for screening of breast cancer and minimizing the burden on the doctor examining the captured image. An ultrasound breast diagnostic system comprises an ultrasound breast imaging apparatus having a water bath into which left and right breasts can be dipped downward and an ultrasound probe so disposed on the bottom of the water bath to mechanically scan and adapted to three-dimensionally image the whole region of the breasts by transmission/reception an ultrasound wave, a breast voxel data creating device for creating voxel data on the entire breasts from image data acquired by the apparatus and a display device used for interpretation of images for displaying an image for image examination from the voxel data on the breasts created by the device which sequentially displays tomograms of cross-sections at bilaterally symmetrical positions of the breasts.
摘要:
A propylene polymer composition is prepared by mixing a first propylene polymer prepared using an olefin polymerization catalyst containing a specific metallocene catalyst component of formula (I), e.g., rac-dimethylsilylene-bis{1-(2-ethyl-4-phenylindenyl)} zirconium dichloride, and an organoaluminum-oxy cocatalyst, with a second propylene polymer component. The compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, and other properties and can be used to produce various structural materials, sheets and films.
摘要:
Disclosed is a novel transition metal compound represented by the following formula: ##STR1## wherein M is a transition metal, X is halogen or the like, R.sup.1 is a hydrocarbon group or the like, R.sup.2 is an aryl group substituted with a halogenated hydrocarbon group, and Y is a divalent silicon-containing group or the like.Also disclosed are an olefin polymerization catalyst component comprising the transition metal compound, an olefin polymerization catalyst comprising the olefin polymerization catalyst component, and a process for olefin polymerization using the olefin polymerization catalyst.An olefin polymerization catalyst component having high polymerization activity can be formed from the transition metal compound. By the use of the olefin polymerization catalyst or the process for olefin polymerization, polyolefins having a high melting point and a high molecular weight can be prepared with high polymerization activity.
摘要:
The novel propylene elastomer according to the invention contains (1) units derived from propylene in amounts of 50 to 95% by mol and units derived from 1-butene in amounts of 5 to 50% by mol, and has (2) triad tacticity (mm fraction), determined by the .sup.13 C-NMR spectrum (hexachlorobutadiene solution, based on tetramethylsilane), of not less than 90%, (3) an intrinsic viscosity (in decalin at 135.degree. C.) of 0.1 to 12 dl/g, (4) a molecular weight distribution (Mw/Mn) of not more than 3 and (5) a randomness parameter B value of 1.0 to 1.5, preferably 1.0 to 1.3. In addition, the elastomer desirably has properties that (6) the elastomer has a melting point Tm of 60.degree. to 140.degree. C., and the melting point Tm and a 1-butene constituent unit content M (% by mol) in the elastomer satisfy the relation -2.6M+130.ltoreq.Tm.ltoreq.-2.3M+155, and (7) a crystallinity C of the elastomer measured by X-ray diffractometry and the 1-butene constituent unit content M (% by mol) satisfy the relation C.ltoreq.-1.5M+75. Such propylene elastomer is excellent in rigidity, heat resistance, scratch resistance, transparency, heat sealing properties and blocking resistance. The propylene elastomer can be prepared using a specific transition metal compound catalyst.
摘要:
The novel transition metal compound of the invention is represented by the following formula (I): ##STR1## wherein M is a transition metal; R.sup.1 is a hydrocarbon group of 2 to 6 carbon atoms, R.sup.2 is an aryl group of 6 to 16 carbon atoms; X.sup.1 and X.sup.2 are each a halogen atom or the like; and Y is a divalent hydrocarbon group, a divalent silicon-containing group or the like. An olefin polymerization catalyst component of the present invention comprises the aforementioned transition metal compound. An olefin polymerization catalyst of the present invention comprises the aforementioned olefin polymerization catalyst component. The propylene homopolymer, the propylene copolymer and the propylene elastomer according to the present invention have such properties that the triad tacticity of propylene units chain is high, a proportion of the inversely units based on the 2,1-insertion of propylene monomer is in the specific range, and the intrinsic viscosity [.eta.], as measured in decahydronaphthalene at 135.degree. C., is in the specific range.
摘要:
Disclosed is an ASE-free continuously tunable external resonator laser in which reduction in tuning range and decrease in output are suppressed. The external resonator laser comprises: a fixed support body which has a half mirror that partially reflects incident light and partially transmits incident light fixed therein; and a rotatory support body which is rotatably supported by the fixed support body by way of a shaft, and which has a laser chip that emits light, a collimator lens that collimates light emitted from the laser chip, and a diffraction grating that diffracts light emitted from the laser chip, fixed therein.
摘要:
A semiconductor device includes a plate-shaped semiconductor element and an electrically insulating resin member. The semiconductor element has a front-surface electrode on its front surface and a back-surface electrode on its back surface. The resin member encapsulates the semiconductor element. The front-surface electrode is exposed to a front side of an outer surface of the resin member. The back-surface electrode is exposed to a back side of the outer surface of the resin member. The resin member has an extension portion that covers the entire side surface of the semiconductor element and extends from the side surface of the semiconductor element in a direction parallel to the front surface of the semiconductor element.
摘要:
A semiconductor device includes a plate-shaped semiconductor element and an electrically insulating resin member. The semiconductor element has a front-surface electrode on its front surface and a back-surface electrode on its back surface. The resin member encapsulates the semiconductor element. The front-surface electrode is exposed to a front side of an outer surface of the resin member. The back-surface electrode is exposed to a back side of the outer surface of the resin member. The resin member has an extension portion that covers the entire side surface of the semiconductor element and extends from the side surface of the semiconductor element in a direction parallel to the front surface of the semiconductor element.
摘要:
A semiconductor device includes a first protection film for covering a first metal wiring. A second protection film is disposed on the first protection film, which is covered with a solder layer. Even if a crack is generated in the second protection film before the solder layer is formed on the second protection film, the crack is restricted from proceeding into the first protection film.