Maize straw core absorbing material and preparing method thereof

The invention discloses a maize straw core absorbing material and a preparing method thereof, which includes the following steps: the maize straw core is crashed to be steamed and boiled in high pressure, sucked, filtered and washed in a mixed solution comprising high boiling-point alcohol and alkali; the filtered slag is oxidized by the oxidizing agent H2O2 and rapidly cooled; the absorbing material is obtained after refrigeration and drying. The preparing method of the invention uses the maize straw core as the raw material for preparing the absorbing material which effectively absorbs neutral protease and maltogenic amylase but does not inactivate the enzyme, sufficiently uses the natural resource, simplifies the preparing method and satisfies the requirements of sustainable development.

Preparation method for biologic sensor and modified electrode based on attapulgite clay soil as substrate

The invention discloses a preparation method of a biosensor and a modified electrode that take attapulgite clay as substrate, the sensor takes the attapulgite clay with natural nano structure as the substrate, and utilizes the unique pore canal structure and the excellent adsorptive capability of the attapulgite clay to fix glucose oxidase (GOD) on the surface of the attapulgite clay, coats the attapulgite clay with adsorbed oxidase on the surface of a glassy carbon electrode, and drops and coats a layer of Nafion methanol solution on the surface, thus forming the Nafion-GOD/ATP/GC modified electrode. The modified electrode, a platinum sheet electrode, a saturated calomel electrode form an electrolytic cell which is further connected with a converter and a display screen to form the biosensor. The biosensor has quick response time, high sensitivity, simple and convenient production method, good repeatability and stability, and convenient mechanization, integration and commercialization.

Method for improving content of cis-methyl-dihydrojasmonate

The invention discloses a method for improving the content of cis-methyl-dihydrojasmonate, which comprises the following steps: filling an object to be converted and a catalyst into a reactor, and putting the reactor into a microwave device; introducing nitrogen into the reactor and starting the microwave device; and after the reaction, introducing the reactants into ice water with a neutral pH value for quick cooling and standing layering, and drying an organic layer to obtain the product, wherein the object to be converted is cis-trans mixed methyl dihydrojasmonate isomer or trans-methyl-dihydrojasmonate, the catalyst is sodium carbonate, sodium sulfate, sodium chloride, calcium chloride, copper chloride or zinc chloride, the mass ratio of the object to be converted to the catalyst is 80-90:1, the microwave power is between 0.2 and 0.5 kW, the reaction time is between 2 and 10 minutes, the temperature of the ice water is less than 40 DEG C, and the drying agent used for drying the organic ...

Method for synthesizing temperature sensitive degradation PNIPAM/CMCS microgel in nuclear shell structure

The invention discloses a method for synthesizing temperature sensitive degradation PNIPAM/CMCS microgel in a nuclear shell structure, which comprises the following steps: firstly, polymerizing a nuclear layer monomer, an initiating agent and a cross-linking agent in second distilled water under the anaerobic condition to obtain PNIPAM seed emulsion; and secondly, polymerizing the PNIPAM seed emulsion, the initiating agent and the nuclear layer monomer in the second distilled water under the anaerobic condition to obtain PNIPAM/CMCS microgel, wherein the nuclear layer monomer is N-isopropylacrylamide, the cross-linking agent is N,N'-methylene-bisacrylamide, the initiating agent is ammonium persulphate/sodium pyrosulfite, azodiisobutyronitrile, N,N,N',N'-tetramethyl ethylene diamine or ammonium cerium nitrate, and the nuclear layer monomer is carboxymethyl chitosan, sodium alginate or glucan. The PNIPAM/CMCS microgel obtained by the method has temperature sensitivity, no poison to organism ...

Method for producing hydrogen chloride and sodium hydrogen sulfate crystals by taking rock salt as raw material

The invention discloses a method for producing hydrogen chloride and sodium hydrogen sulfate crystals by taking rock salt as the raw material, which comprises the following steps that: the mixture of sodium sulfate and sodium chloride, i.e. rock salt and sulfuric acid react to produce the hydrogen chloride and sodium hydrogen sulfate crystals; first, under a stirring condition, according to a certain stoichiometric ratio, sulfuric acid and rock salt are intermittently added into a glass lining reaction vessel to react while the temperature is insulated; and then sodium bisulfate solution which contains sulfuric acid is introduced to a crystal tower which contains an appropriate amount of water from the bottom of the reaction vessel to be cooled, crystallized and vacuum filter step by step, and then is washed by saturated sodium bisulfate solution to prepare sodium bisulfate crystals; and finally, the high-concentration sulfuric acid is added into the filtrate to be mixed to be sulfuric ...

Matches' phosphorus strike-surface compositions

A phosphorus surface formulation of match is composed of red phosphorus, manganese dioxide, quratz powder, pyrite, and adhesive in wt.% of the total phosphorus surface formulation as follows: red phosphorus 40-50, manganese dioxide 10-15, quartz powder 5-12, pyrite 25-30, and adhesive 8-10. The advantage of this formulation is that the low-price abundant pyrite is used to substitute the insufficient antimony trisulfide. Pollution of atmosphere antimony trisulfide is prevented, and prodn. cost is lowered.

Method for producing hydrogen chloride and sodium hydrogen sulfate crystals by taking rock salt as raw material

The invention discloses a method for producing hydrogen chloride and sodium hydrogen sulfate crystals by taking rock salt as the raw material, which comprises the following steps that: the mixture of sodium sulfate and sodium chloride, i.e. rock salt and sulfuric acid react to produce the hydrogen chloride and sodium hydrogen sulfate crystals; first, under a stirring condition, according to a certain stoichiometric ratio, sulfuric acid and rock salt are intermittently added into a glass lining reaction vessel to react while the temperature is insulated; and then sodium bisulfate solution which contains sulfuric acid is introduced to a crystal tower which contains an appropriate amount of water from the bottom of the reaction vessel to be cooled, crystallized and vacuum filter step by step, and then is washed by saturated sodium bisulfate solution to prepare sodium bisulfate crystals; and finally, the high-concentration sulfuric acid is added into the filtrate to be mixed to be sulfuric ...

Method of preparing activated carbon from corn straw

Method for synthesizing temperature sensitive degradation PNIPAM/CMCS microgel in nuclear shell structure

The invention discloses a method for synthesizing temperature sensitive degradation PNIPAM/CMCS microgel in a nuclear shell structure, which comprises the following steps: firstly, polymerizing a nuclear layer monomer, an initiating agent and a cross-linking agent in second distilled water under the anaerobic condition to obtain PNIPAM seed emulsion; and secondly, polymerizing the PNIPAM seed emulsion, the initiating agent and the nuclear layer monomer in the second distilled water under the anaerobic condition to obtain PNIPAM/CMCS microgel, wherein the nuclear layer monomer is N-isopropylacrylamide, the cross-linking agent is N,N'-methylene-bisacrylamide, the initiating agent is ammonium persulphate/sodium pyrosulfite, azodiisobutyronitrile, N,N,N',N'-tetramethyl ethylene diamine or ammonium cerium nitrate, and the nuclear layer monomer is carboxymethyl chitosan, sodium alginate or glucan. The PNIPAM/CMCS microgel obtained by the method has temperature sensitivity, no poison to organism ...

Method for preparing active carbon from stalk of wheat

Bastard tamarind legume extract, and preparation method thereof and anti-bacteria agent

The invention relates to a silk tree pod extract and preparation method thereof with antibacterial agent. The silk tree pod extract uses silk tree pod as raw materials, which is extracted in the solvent extraction through separating solvent after leaching, extract is obtained through distilling extract phase. The antibacterial agent prepared by the extract has different inhibitory action on coliform bacteria, staphylococcus aureus, salmonella, huge bacillus, bacillus subtilis and Pseudomonas aeruginosa, wherein ether extract has the strongest inhibitory action on the above fungi, particularly for the huge bacillus, bacillus subtilis with higher inhibitory action than on penicillin. The invention makes full use of silk tree pod resource which is not developed, provides operable key technology for developing novel antibacterial agent, and provides novel technical support for plant antimicrobial agent.

Maize straw core absorbing material and preparing method thereof

The invention discloses a maize straw core absorbing material and a preparing method thereof, which includes the following steps: the maize straw core is crashed to be steamed and boiled in high pressure, sucked, filtered and washed in a mixed solution comprising high boiling-point alcohol and alkali; the filtered slag is oxidized by the oxidizing agent H2O2 and rapidly cooled; the absorbing material is obtained after refrigeration and drying. The preparing method of the invention uses the maize straw core as the raw material for preparing the absorbing material which effectively absorbs neutral protease and maltogenic amylase but does not inactivate the enzyme, sufficiently uses the natural resource, simplifies the preparing method and satisfies the requirements of sustainable development.

Active type coil spring suspension

The invention discloses an active type coil spring suspension which comprises a spring pre-tightening force regulating device, a suspension height regulating device and a shock absorber (15), wherein the spring pre-tightening force regulating device comprises an upper spring seat (8), a coil spring (12), a lower spring seat (13), a pull rod (11), a pre-tightening driven gear (9) and a pre-tightening power device; the pre-tightening driven gear (9) is rotatably arranged on the upper spring seat (8) through upper and lower bearings (10); the pull rod (11) is connected with the pre-tightening driven gear (9) through thread fit and passes through the upper spring seat (8), the coil spring (12) and the lower spring seat (13); the lower end of the pull rod (11) is provided with a limit clamping piece (14); and the pre-tightening power device is matched with the pre-tightening driven gear (9). After adopting the structure, the coil spring suspension has the advantages of simple structure, light ...