摘要:
Provided is a polypropylene resin foam-molded article which has a rib having a relatively small thickness and which has an improved strength at a boundary part between a main body part and the rib part without increasing a thickness of the rib part. The polypropylene resin foam-molded article is obtained by molding a material for a foam-molded article using a polypropylene resin, wherein the molded article comprises a main body part and a rib part provided vertically to the main body part; the rib part has a thickness (Tr) of 3 mm or less, or a thickness ratio (Tr/Tb) of a thickness of the rib part (Tr) to a thickness of the main body part (Tb) is 0.8 or less; the main body part and the rib part each comprise a non-foamed surface layer and an intermediate layer having a foamed structure; and the intermediate layer in the main body part is connected to the intermediate layer in the rib part. It is molded from the material for a foam-molded article using a polypropylene resin in which a melt flow rate and a melt tension satisfy a fixed relation.
摘要:
Intermediate compounds, including 2-(t-butyldimethylsilyloxymethyl)-3,4-null(dimethylmethylene)dioxynull-5-hydroxy-tricyclonull5.2.1.02,6nulldec-8-ene, which are useful for the synthesis of neplanocin A having strong antitumor activity. Improved processes for the preparation of neplanocin A, starting from optically active 2-hydroxymethyl-5-hydroxy-tricyclonull5.2.1.02,6nulldeca-3,8-diene and via a key step comprising a retro-Diels-Alder reaction of the above intermediate.
摘要:
A non-woven fabric comprising staple fibers, having a fiber length of 3 to 25 mm and a single fiber fineness of 1 to 100 denier, and is produced by the fibers being dropped while being dispersed to be accumulated and adhered at the intersection point of the staple fibers. The non-woven fabric has a specific volume of 40 to 200 cm3/g, and the number of fiber lumps having a volume of not less than 1 mm3 is not more than 5 lumps per 20 g of the non-woven fabric. The bulky non-woven fabric of the present invention in which the sufficient contribution to bulkiness by fibers is exhibited is suitable for sanitary materials, such as disposable diapers, sanitary napkins, incontinence pads, nursing pads or the like, or wipes etc.
摘要:
The present invention provides liquid crystalline compounds having a high voltage holding ratio and a low threshold voltage, little variation of these properties with temperature change, high nulln, and good compatibility with other liquid crystal materials particularly under a low temperature; liquid crystal compositions containing these crystalline compounds; and liquid crystal display devices made using these liquid crystal compositions. The liquid crystalline compounds are terphenyl derivatives represented by general formula (1): 1 wherein R represents a straight or branched alkyl group of 1-20 carbon atoms, and any methylene groups (nullCH2null) not adjacent each other in each alkyl group may be replaced by oxygen atoms; X is a halogen atom, nullOCF3, nullOCF2H, nullCF3, nullCF2H or nullCFH2; Y1, Y2, Y3, Y4, Y5 and Y6 independently represents H or F, but at least two of Y1, Y2, Y3 and Y4 represent F; and any atom constituting these compounds may be substituted by its isotope.
摘要:
A catalyst for ester production which comprises zirconium oxide, copper, and at least one oxide selected from the group consisting of zinc oxide, chromium oxide, aluminum oxide and silicon oxide, and is obtainable by reducing with hydrogen a catalyst precursor prepared by the reaction of a salt containing at least one of metals constituting the oxides, a zirconium salt and a copper salt with an alkali hydroxide; and a process for producing an ester which comprises bringing either an alcohol or an alcohol and an aldehyde into contact with this catalyst in a gas phase.
摘要:
Metallocene compounds represented by the following general formula (1): YqKLMX2nullnull(1) wherein M, Y, q, L and X are each as defined in the Specification.
摘要:
This invention is to provide a photoprotein which binds with a ligand specific for a substance to be detected at a binding ratio of 1:1 such that the luminescence activity is not reduced by binding with the ligand, a conjugate comprising the luminescent photoprotein and ligand, and a substance detection method which employs the conjugate as a marker. A calcium-binding photoprotein is produced having cysteine residue introduced within the 4th amino acid residue from the amino-terminus. A conjugate is formed by binding a ligand specific for a substance to be detected to the calcium-binding photoprotein, in a binding ratio of 1:1, via the introduced cysteine residue. The conjugate may be utilized as a marker for a substance to be detected.
摘要:
Intermediate compounds, including 2-(t-butyldimethylsilyloxymethyl)-3,4-null(dimethylmethylene)dioxynull-5-hydroxy-tricyclonull5.2.1.02,6nulldec-8-ene, which are useful for the synthesis of neplanocin A having strong antitumor activity. Improved processes for the preparation of neplanocin A, starting from optically active 2-hydroxymethyl-5-hydroxy-tricyclonull5.2.1.02,6nulldeca-3,8-diene and via a key step comprising a retro-Diels-Alder reaction of the above intermediate.
摘要:
In a pultrusion device for producing continuous length sections prepared from thermoplastic resins reinforced with long fibers, the vertical angle (null) of an upstream conical surface of a conical portion, which constitutes a shaping nozzle perforated through the downstream end wall of the device ranges from 15 to 35 degrees and the shaping nozzle has a land portion having a length of 1 to 5 mm in the downstream area subsequent to the upstream conical surface. According to this pultrusion device for producing continuous length sections prepared from thermoplastic resins reinforced with long fibers, the long fibers never undergo any breakage nor fluffing during the opening treatment and this accordingly leads to the substantial reduction of pill-formation. As a result, the opening-impregnation device of the present invention provided at least with the downstream end wall carrying the shaping nozzle (including the land portion) can stably and continuously be operated over a long period of time, without any trouble such as those encountered in the conventional devices.
摘要:
To provide chargeable tow and a laminate thereof, which can be produced with no restriction by the production or processing method, and without troubles such as twining on a roll or single thread snapping caused by static electricity generated in the production steps. Tow, in which the value (D/W) obtained by dividing the total fineness of tow (D) by the tow width (W) is 1,000 to 8,000 dtex/mm, is produced by making a fiber-processing agent adhere thereto, preferably using a particular amount of the agent, wherein the agent has a particular structure and contains a polyoxyethylene higher fatty acid ester and a sorbitan fatty acid ester in a particular blending ratio.