摘要:
A process for producing cellulose acetate by acetylation reaction with cellulose as a raw material, wherein acetate is used as an acetylating agent.
摘要:
A producing method of a cellulose polymer powder is provided, which comprises dissolving a cellulose polymer by exposure to an organic solvent containing, as the main component, an ester-based solvent having from 2 to 8 carbon atoms, a ketone-based solvent having from 4 to 10 carbon atoms, or an alcohol-based solvent having from 3 to 6 carbon atoms, and carbon dioxide, and then removing the carbon dioxide and the organic solvent from the solution. A producing method of an organic solvent solution of a cellulose polymer is also provided.
摘要:
This invention provides a compound which is useful as an electric charge transportation agent for electrophotographic photosensitive materials and organic EL devices, and its production method. Illustratively, a compound of formula (I) is produced by way of a dehydration reaction of a compound of formula (II).
摘要:
An organic luminescent device material which is a compound represented by the following formula (I): Formula (I) wherein V, W, X and Y each represents L1—NR1R2, wherein R1 and Rz each represents an aliphatic hydrocarbon group, an aryl group or a heterocyclic group, R1 and R2 may be combined directly or indirectly to form a ring, and L1 represents a divalent linking group containing an aryl group and/or an aromatic heterocyclic group.
摘要:
An analytical element (typically DNA chip) composed of a solid carrier and a group of nucleotide derivatives or their analogues fixed to the solid carrier via covalent bonding is favorably produced by a method of bringing in a liquid phase a group of nucleotide derivatives or their analogues having a reactive group at one end thereof or its vicinity into contact with a solid carrier having thereon a reactive group in the presence of a transition metal-containing catalyst.
摘要:
The present invention provides a method for preparation of a compound of the formula (I) useful as a fog restrainer for a silver halide light-sensitive material, especially for a heat-developing light-sensitive material and a synthetic intermediate for the fog restrainer. The method makes it possible to obtain the fog restrainer in good yield and in short steps. ##STR1## wherein, R.sup.1 is alkyl, cycloalkyl, or aryl, R.sup.2 and R.sup.3 are hydrogen atom or alkyl, R.sup.4 is hydrogen atom or acyl, and R.sup.1 and R.sup.4 may be bonded together to form 5- or 6-membered ring.
摘要:
An image forming method is disclosed which comprises developing a silver halide photographic material with a developing solution containing an aromatic primary amine developing agent in the presence of an imidazo[1,2-b]pyrazole type coupler represented by the following general formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group, an alkoxy group, an aryloxy group or an aryl group; R.sub.2 represents an alkoxy group, an aryloxy group or an amino group; R.sub.3 represents a hydrogen atom, an alkyl group or an aryl group; and X represents a hydrogen atom or a group capable of being released upon coupling with an oxidation product of an aromatic primary amine developing agent.The magenta coupler represented by general formula (I) is excellent in color reproducibility, sensitivity and color density.A silver halide color photographic material containing the magenta coupler is also disclosed.
摘要:
The inkjet recording apparatus includes: a recording head including nozzles which discharge droplets of ink onto a recording medium for printing, the ink containing fine particles of an organic pigment manufactured by the steps of: flowing a solution of an organic pigment dissolved in an alkaline or acidic aqueous medium through a channel which provides a laminar flow; and changing a hydrogen ion exponent (pH) of the solution in a course of the laminar flow; a computing device which computes a non-operational time period for one of the nozzles; a calculating device which calculates a predicted non-operational time period until a next operation of the one of the nozzles; and a preliminary discharge control device which performs control whereby preliminary discharge of the one of the nozzles is carried out if a total of the non-operational time period and the predicted non-operational time period exceeds a reference time period.
摘要:
A method of producing a metal phthalocyanine pigment, which contains the step of: allowing an alkali metal salt of phthalocyanine to react with a metal salt, in a solvent which is mainly composed of a sulfur-containing aprotic polar solvent.
摘要:
A method of producing an organic pigment dispersion liquid, which has the steps of: providing an alkaline or acidic solution with an organic pigment dissolved therein and an aqueous medium, wherein a polymerizable compound is contained in at least one of the organic pigment solution and the aqueous medium; mixing the organic pigment solution and the aqueous medium; and thereby forming the pigment as fine particles; then polymerizing the polymerizable compound to form a polymer immobile from the pigment fine particles.