6 results about "Trace element composition" patented technology

The invention discloses a sulfur-oxidizing bacterium screening and enriching nutrient solution, a sulfur-oxidizing bacterium enriching method and a deodorizing method. The sulfur-oxidizing bacterium screening and enriching nutrient solution comprises 1.0 g.L <-1 > of K2HPO4, 0.5 g.L <-1 > of NaHCO3, 0.05 g.L <-1 > of NH4Cl, 0.225 g.L <-1 > of Na2S. 9H2O and 0.001 g.L <-1 > of trace elements, wherein the trace elements comprise 0.5 g.L <-1 > of EDTA (Ethylene Diamine Tetraacetic Acid), 0.01 g.L <-1 > of (NH4) 6Mo7O24. 4H2O, 0.04 g.L <-1 > of ZnSO4. 7H2O, 0.03 g.L <-1 > of MnCl2. 7H2O, 0.02 g.L <-1 > of CuSO4. 5H2O The deodorization performance of the municipal sewage treatment plant is improved through synchronous desulfurization and deamination of the acidophilic sulfur-oxidizing bacteria, and compared with a traditional deodorization process, the synchronous desulfurization and deamination process can enrich high-abundance sulfur-oxidizing bacteria in a short time and shows higher ammonia gas and hydrogen sulfide removal capacity.

The invention relates to a multi-scale precipitation strengthened wide-temperature-range high-toughness iron-based medium-entropy alloy and preparation and application thereof, and aims to solve the technical problems that the high-temperature strength of an existing iron-based medium-entropy alloy is insufficient, and the strength and the plasticity are difficult to consider at the same time. The alloy is prepared from the following components in percentage by atomic number: 46.6%-50.1% of Fe, 26.0%-30.0% of Ni, 5.0%-7.0% of Al, 2.0%-4.0% of Ti, 12.0%-14.0% of Cr, 0.5%-2.5% of Nb and 0-5% of trace elements. The alloy shows excellent obdurability matching in a wide temperature range of 77K-973K, particularly, the yield strength can reach 831-951 MPa at the high temperature of 973K, the ductility reaches 10-31%, and meanwhile, the alloy has good corrosion resistance; compared with a contrast which does not contain the Nb element, the alloy disclosed by the invention shows more excellent comprehensive strength and plasticity at low temperature, room temperature and high temperature. In addition, the cost of the alloy can be comparable with that of traditional steel, a component regulation window is wide, and huge engineering application potential is shown.

The invention discloses a silverweed cinquefoil root flowering fertilizer composite formula and application thereof, and relates to the technical field of compound fertilizers, the silverweed cinquefoil root flowering fertilizer composite formula comprises, by weight, 15-25 parts of a nano carrier, 28-44 parts of an organic raw material, 7-15 parts of an inorganic raw material, 8-12 parts of biological bacteria, 0.2-0.3 part of a biological regulator, and 6-11 parts of a trace element composition; wherein the nano carrier is prepared from 12 to 20 parts of nano diatomite and 3 to 5 parts of nano hydroxyapatite; the nano diatomite is obtained by sequentially stirring a 2mol / L NaOH solution at the temperature of 60 DEG C for 2 hours, adjusting the pH value to 6.0 by a 1mol / L HCl solution and drying at the temperature of 105 DEG C; the specific surface area of the nano diatomite is greater than or equal to 85 m < 2 > / g The application has the effects of meeting the nutrient and physiological requirements in the key flowering period of the potentilla anserine and improving the flowering rate and the fruit setting rate of the potentilla anserine through nano-carrier modification and functional component optimization.

The invention provides a total rock component accurate testing method for extraterrestrial rare samples, and belongs to the technical field of earth and planetary science total rock component test.The method comprises the steps that a platinum interference sealing container is adopted as a reaction carrier, 10-20 mg of representative samples are smashed till the particle size is smaller than or equal to 75 micrometers, and then the representative samples are totally put into the platinum interference sealing container to guarantee air tightness; after high-temperature melting in the nitrogen (N2) atmosphere is repeated for multiple times, rapid quenching is carried out to form vitreous molten beads; and after cutting, polishing and target making, carrying out quantitative analysis on main trace elements by using an electronic probe and a laser ablation plasma mass spectrometer. The method is characterized in that loss of volatile components is inhibited through sealing design, and vitreous components are uniform through rapid quenching cooling after grinding, smashing and high-temperature melting. According to the method, the demand quantity of samples is remarkably reduced, the problem of high-precision and high-fidelity total-rock main trace element component analysis of extraterrestrial rare samples is solved, and key technical support is provided for planetary scientific research.

This invention discloses a trace element composition and its application for improving the fermentation efficiency of *Clostridium autoethanogenum* under conditions containing CO2 and H2 syngas, belonging to the field of microbial fermentation technology. The trace element composition comprises the following components: 1.5% nitroglycerin, 3% magnesium sulfate, 0.5% manganese sulfate, 0.1% ferrous sulfate, 0.18% cobalt sulfate, 0.1% calcium chloride, 0.18% zinc sulfate, 0.01% copper sulfate, 0.02% potassium aluminum sulfate, 0.01% boric acid, 0.01% sodium molybdate, 0.03% nickel chloride, and 0.004% sodium tungstate. Using the trace element composition of this invention, after 4 days of fermentation under conditions containing CO2 and H2 syngas (CO2:H2=1:2, CO-free), the cell concentration is nearly twice that of the control group without the composition, and the syngas utilization rate is significantly improved. This invention provides an effective technical solution to the problem of low fermentation efficiency of self-producing ethanol Clostridium in a pure CO2 and H2 system, and has good prospects for industrial application.

A stable trace element composition, its preparation method, and its use are disclosed. The trace element composition comprises a main material and auxiliary materials. The main material comprises pharmaceutical organic acid salts of iron, zinc, copper, and manganese, pharmaceutical salts of fluorine, iodine, selenium, and molybdenum, and a pharmaceutical organic or inorganic salt of chromium. The auxiliary materials comprise water for injection and a pH adjuster, which is an inorganic acid. The pH value of the trace element composition is 2.0 to 3.5. The amount of each trace element per 10 mL of the trace element composition is (unit: μmol): 17.8 to 21.5 μmol iron, 40 to 100 μmol zinc, 4.7 to 9.6 μmol copper, 1 μmol manganese, 25 to 60 μmol fluorine, 0.5 to 1.2 μmol iodine, 0.75 to 1.27 μmol selenium, 0.2 to 0.26 μmol molybdenum, and 0.2 to 0.4 μmol chromium.