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Preparation method of covalent organic framework composite microspheres with core-shell structures

The invention relates to a preparation method of covalent organic framework composite microspheres with core-shell structures. The method comprises the following steps: dissolving silicon dioxide microspheres, a first construction element and a second construction element in an organic solvent; and after adding a catalyst, rapidly synthesizing into the composite microspheres with core-shell structures at a certain temperature. In a preparation process, reaction conditions are gentle, the method is simple, and the yield is high; the prepared covalent organic framework composite microspheres have the advantages of good core-shell morphology, high specific surface area, ordered pore structures, good mechanical stability, thermal stability, chemical stability and the like, if the microspheres are used as a chromatographic stationary phase, the chromatographic mass transfer resistance can be reduced effectively, the theoretical plate height is improved, and finally, column efficiency and degree of separation are improved; and if the microspheres are used as solid-phase extracting filler, the enrichment effect can be improved remarkably. The covalent organic framework composite microspheres with core-shell structures have good application prospects in the aspect of separation and enrichment of small organic molecules.
Owner:FUZHOU UNIV

Bactericide used for controlling brassica rapa pekinensis downy mildew and prepared by complexation of bacillus subtilis and chemical bactericide

The invention relates to a pesticide, and especially relates to a complex bactericide composed of bacillus subtilis and a chemical bactericide. The bactericide is used for controlling brassica rapa pekinensis downy mildew. The bactericide comprises the chemical bactericide, bacillus subtilis XM16 CGMCC No.0372, and auxiliary materials. The bactericide is characterized in that the chemical bactericide in the active components is any one selected from metalaxyl, propamocarb, and mancozeb. A biocontrol bacterium is bacillus subtilis XM16, with the strain collection number of CGMCC No.0372. A weight ratio of metalaxyl to bacillus subtilis XM16 is 1-8:1-10. A weight ratio of propamocarb to bacillus subtilis XM16 is 1-10:15-140. A weight ratio of mancozeb to bacillus subtilis XM16 is 1-15:1-10. A form of the bactericide is usually hydrophilic powder or aqueous solution. The complex agent of the biocontrol bacterium and the chemical bactericide has a substantial synergetic effect in controlling brassica rapa pekinensis downy mildew. The biocontrol bacterium bacillus subtilis XM16 is advantaged in high bacteriostatic activity, high stress resistance, and wide bactericidal spectrum. The biocontrol bacterium is complexed with the oomycetes chemical bactericide, such that the pesticide dosage is reduced, and controlling effect is improved. The bactericide is an environment-friendly bactericide. The bactericide is advantaged in high biological safety, low cost, and substantial economic benefit.
Owner:QINGDAO AGRI UNIV

Botanical fungicide and the preparation method thereof

The invention relates to a botanical fungicide and the preparation method thereof, which relate to a fungicide and the preparation method. The invention solves the shortcomings of the existing fungicide in severe environmental pollution and resistance due to long-term use. The botanical fungicide of the invention is made from stellera chamaejasme, liquorice, aconite and radix sophorae falvescentis. The method of the invention comprises the steps of: 1. weighing and mixing the stellera chamaejasme, liquorice, aconite and radix sophorae falvescentis; 2. leaching the ethanol; 3. filtering; 4. distilling; 5. moist heat sterilization. The botanical fungicide of the invention has the advantages of innocuity, low residuals, small dosage, no pollution, no resistance, strong bacteriostatic activity, high selectivity, diversified raw material sources, easy match with other biological pesticides, etc. The method of the invention has the advantages of simple process, and low cost. Compared with the chemical agent, the Chinese herbal medicine fungicide has the advantages of many active sites, long agent duration, high degradation speed, small pollutions to the environments, etc.
Owner:黑龙江省农业科学院植物脱毒苗木研究所

Preparation and application of core-shell type magnetic metal organic framework nano-particles

The invention relates to preparation and an application of core-shell type magnetic metal organic framework nano-particles. The preparation comprises specific steps as follows: (1), a nano substrate with superparamagnetism is prepared; (2), carboxyl modified magnetic nano-particles are prepared; (3), 100-200 mg of carboxyl modified magnetic nano-particles prepared in the step (2) are dispersed in 5-10 mL ethanol solution containing 10 mmol L<-1> FeCl3.6H2O and are left to stand for 15-20 min at the room temperature, the obtained nano-particles are washed by ethanol for 2-3 times, and FeCl3*6H2O which is not adsorbed is removed; the magnetic nano-particles are dispersed in 5-10 mL ethanol solution containing 10 mmol L<-1> 1,3,5-trimesic acid and left to stand for 30-60 min at the temperature of 70 DEG C; the operation is performed circularly for 10-40 times, the obtained magnetic nano-particles are subjected to vacuum drying for 12-24 h at the temperature of 150 DEG C, and accordingly, the core-shell type magnetic metal organic framework nano-particles are obtained. By means of a pore structure and a large quantity of Fe<3+> ions, acting sites of a material and phosphoeptide are greatly increased, and selectivity, limit of detection and enrichment capacity of the material are improved.
Owner:SOOCHOW HIGH TECH CHROMATOGRAPHY

Application of multifunctional plant-source bactericide to control iris tectorum gray mold

The invention relates to application of a multifunctional plant-source bactericide to control iris tectorum gray mold. The plant-source bactericide is prepared from the following compositions in parts by weight: 0.5-2 parts of radix stellerae chamaejasmes, 3-5 parts of artemisia carvifolia, 0.7-2 parts of artemisia annua, 0.3-1 part of cinnamomum camphora, 1-3 parts of tobacco leaf, 0.8-1.6 parts of glycyrrhiza uralensis, 1-3 parts of fruit of Chinese sumac, 3-5 parts of galla chinensis, 0.5-2 parts of radix sophorae flavescentis, and 0.2-0.6 part of a synergist. The plant-source bactericide has the advantages of no toxicity, low residue, no pollution, no drug resistance, relatively strong bacteriostatic activity, high selectivity and wide raw material source.
Owner:南通市乐悦实业有限公司

Sterilization composition containing difenodiconazole and pyraclostrobin

The invention relates to a pesticide composition and particularly relates to a sterilization composition which is used for controlling powdery mildew, anthracnose, late blight, brown blotch and banded sclerotial blight in agriculture. The sterilization composition contains active ingredients including difenodiconazole and pyraclostrobin. Compared with the single preparation, the sterilization composition has an obvious synergistic effect on agricultural diseases and is beneficial to overcoming and delaying the production of bacteria resistance.
Owner:HANGZHOU UDRAGON CHEMICAL CO LTD
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