摘要:
Disclosed are herbicidally active pyrimidine derivatives of the formula ##STR1## wherein R represents a hydrogen atom or an etherifying group, e.g., a lower alkyl, lower alkenyl, lower alkynyl, phenyl-substituted lower alkenyl, lower haloalkenyl, cycloalkyl, substituted phenyl-substituted lower alkenyl or phenyl-substituted lower alkynyl group; or a group represented by the following formula: ##STR2## wherein R.sup.1 represents a hydrogen atom or a lower alkyl group, X a halogen atom or a lower alkyl or lower alkoxyl group, m and n individually 0-2, and when m is 2, both Xs may be the same or different, and herbicidal compositions containing the same, alone or in combination with another herbicidally active compound, the pyrimidine derivatives being prepared by reaction of 2-(4,6-dimethoxy-2-pyrimidinyloxy)benzaldehyde with NH.sub.2 OR or with a salt of hydroxylamine followed by reaction with a halide of the formula RY wherein R has the same value as above and Y is Cl, Br or I.
摘要:
Disclosed are herbicidally active pyrimidine derivatives of the formula ##STR1## wherein R represents a hydrogen atom or an etherifying group, e.g., a lower alkyl, lower alkenyl, lower alkynyl, phenyl-substituted lower alkenyl, lower haloalkenyl, cycloalkyl, substituted phenyl-substituted lower alkenyl or phenyl-substituted lower alkynyl group; or a group represented by the following formula: ##STR2## wherein R.sup.1 represents a hydrogen atom or a lower alkyl group, X a halogen atom or a lower alkyl or lower alkoxyl group, m and n individually 0-2, and when m is 2, both Xs may be the same or different, and herbicidal compositions containing the same, alone or in combination with another herbicidally active compound, the pyrimidine derivatives being prepared by reaction of 2-(4,6-dimethoxy-2-pyrimidinyloxy)benzaldehyde with NH.sub.2 OR or with a salt of hydroxylamine followed by reaction with a halide of the formula RY wherein R has the same value as above and Y is Cl, Br or I.
摘要:
Benzaldehyde acetal compounds represented by the following formula: ##STR1## in which each R is a C.sub.3-8 alkyl group and forms an ether bond with the corresponding oxygen atom of the orthoaldehyde moiety have no injury to crops and, moreover, exhibits superb herbicidal effects owing to the limitation of the number of carbon atoms of each alkyl group to 3-8.
摘要:
Herbicidally active pyridyloxypyrimidines represented by the following formula [I]: ##STR1## wherein R means a formyl group or an acetal group represented by ##STR2## R.sup.1 and R.sup.2 being the same or different and individually denoting an alkyl group having 1-4 carbon atoms or R.sup.1 and R.sup.2 being coupled together and denoting an alkylene group, R.sup.3, having 2-3 carbon atoms; are prepared by reacting 2 formyl-3-hydroxypyridine or 3-hydroxy-2-pyridine carboxaldehyde acetal with 2 halogeno-4,6 dimethoxypyrimidine in the presence of a base.
摘要:
1-(3-Substituted benzyl)-3-halogeno-4-(1-halogenoalkyl)-2-pyrrolidinones of the general formula (I): ##STR1## where X represents a hydrogen atom or halogen atom, Y and Z each represents a chlorine atom or bromine atom, and R represents an alkyl group with 2 to 4 carbon atoms, are herbicides useful in rice paddy fields to control weeds therein, especially Echinochloa crusgalli and can be produced subjecting the corresponding 3-dihalogeno compounds to dehalogenation to remove one of the halogen atoms or by cyclizing a 2,2-dihalogenoacetamide derivative represented by the general formula (II) under the presence of an appropriate catalyst; ##STR2## in which X, Y, Z and R respectively have the same meanings as described above.
摘要:
Novel 3-substituted phenyl-2-isoxazoline-5-carboxylic acids or esters thereof. These compounds have excellent properties as plant growth regulators.
摘要:
Novel 3-substituted phenyl-2-isoxazoline-5-carboxylic acids or esters thereof. These compounds have excellent properties as plant growth regulators.
摘要:
A method of producing chemicals through continuous fermentation includes washing a membrane with a washing liquid supplied from a permeate side of a membrane unit in a continuous fermentation; filtering a culture medium containing a fermentation feedstock, a chemical and a microbe or a cultured cell through a separation membrane; collecting the chemical from a filtrate; retaining or refluxing unfiltered remains in the culture medium; and adding a fermentation feedstock to the culture medium, wherein the washing liquid is high-temperature water having a temperature higher than a temperature of the culture medium and of 150° C. or less, and a concentration of the microbe in a fermenter is controlled by supplying the washing liquid.
摘要:
A method produces a chemical by fermentation including: filtering a liquid containing a feedstock, the chemical, and bacterial, microbial or cultured cells through a membrane to recover the chemical from the filtrate; retaining or refluxing unfiltered liquid in the liquid; and adding the feedstock to the liquid, wherein the membrane is a porous hollow-fiber membrane including a polyvinylidene fluoride resin, the porous hollow-fiber membrane having an average pore size of 0.001 μm to 10.0 μm, pure water permeability coefficient at 50 kPa at 25° C. of 0.5 m3/m2/hr to 15 m3/m2/hr, breaking strength of 5 MPa to 20 MPa, elongation at break of 30% to 200%, crimping degree of 1.3 to 2.5, porosity of not less than 40%, and critical surface tension of 45 mN/m to 75 mN/m.
摘要:
A hollow fiber membrane module for use in production of a chemical substance, which is used in continuous fermentation including filtering a fermentation broth of a microorganism or a cultured cell through a hollow fiber membrane, collecting a chemical substance from a filtrate, retaining a concentrated solution in the fermentation broth or refluxing the concentrated solution, and adding a fermentation raw material to the fermentation broth, wherein a large number of hollow fiber membrane bundles are accommodated in a tubular case, at least one end part of each of the bundles is fixed on the tubular case by a hollow fiber membrane bundling member with an end face of each of the hollow fiber membranes open, and the hollow fiber membrane bundling member is made of a synthetic resin having a hardness retention rate after contact with saturated steam at 121° C. for 24 hours of 95% or more.