33results about How to "Improve the cumulative effect" patented technology

The present invention comprises a warhead designed to provide a number of spiraling tendrils composed of segmented rods that move in an increasing radial arc in order to defeat a target. The warhead comprises a substantially cylindrical explosive charge having a plurality of rod segments arranged circumferentially around the explosive charge in a plurality of horizontal layers. As the horizontal layers descend down the explosive charge, the rod segments are offset from those directly above and below them to create a pattern that appears to be twisted columns. The number of columns is equivalent to the number of rod segments in each horizontal layer.

The invention proposes a preparation method of short-cut nitrification and denitrification granular sludge in high Do condition, which belongs to the technical field of waste water biological treatment. The short-cut nitrification and denitrification granular sludge mainly comprises bacilli and cocci and has higher nitrite depositing ability, denitrification ability and heterotroph activity so that the problem of free ammonia inhabitation caused when high NH4<+>-N selects and enriches nitrosation bacteria can be avoided and short-cut nitrification can be realized without increasing N2O release during short-cut nitrification in the high Do condition. The short-cut nitrification and denitrification granular sludge prepared by using the method has the advantages of compact granule structure and good stability, is suitable for treating the waste water with low COD (Chemical Oxygen Demand) and high NH4<+>-N, and can ensure the application of the short-cut nitrification and denitrification granular sludge in actual waste water treatment.

The invention discloses a production method for lipid through synchronous mixed culture of microbes. The method comprises the following steps: (1) culturing facultative anaerobic bacteria seed liquid; (2) culturing autotrophic microalgae seed liquid; and (3) mixing the facultative anaerobic bacteria seed liquid and the autotrophic microalgae seed liquid and carrying out synchronous mixed culture in an illuminated bioreactor, wherein during synchronous mixed culture, an organic carbon source needed in growth and metabolism of the facultative anaerobic bacteria is supplemented. The method provided by the invention has the advantages of increased harvest yield of autotrophic microalgae, an improved utilization rate of an inorganic carbon source (CO2), increased content of microbial lipid, a simplified culture apparatus and the like, and exerts small influence on the fermentation process of the facultative anaerobic bacteria, thereby realizing synchronous culture of the facultative anaerobic bacteria and the autotrophic microalgae.

The invention discloses a novel fluorine-containing acrylate monomer and a synthesis method and application thereof. The synthesis method comprises the following steps: (1) taking toluene-2,4-diisocyanate shown in a formula (II) as a raw material to perform first-step addition reaction with 2-hydroxyethyl methacrylate shown in a formula (III) by taking organic tin as a catalyst in a polar aproticsolvent, and reacting until the II basically disappears to obtain reaction liquid A containing an intermediate shown in a formula (IV); and (2) directly adding the reaction liquid A to 2-methoxyl-3-perfluorenoxy diol shown in a formula (V) to perform second-step addition reaction, obtaining reaction liquid B after the reaction is over, and performing solvent removal and column chromatography on the reaction liquid B to obtain the fluorine-containing (methyl) acrylate monomer shown in a formula (I). The invention provides the fluorine-containing acrylate monomer with a brand-new structure and capable of serving as a waterproof and oilproof treating agent; and the synthesis method is simple, and the fluorine-containing acrylate monomer can be prepared by a one-pot method.

The invention discloses a production method for lipid through coupled culture of microbes. The method comprises the following steps: (1) culturing autotrophic microalgae seed liquid and carrying out enlarged culture until the OD value of biomass is 5.0 to 10.0, wherein the pH value of microalgae seed liquid having undergone enlarged culture is 9 to 12; (2) culturing facultative anaerobic bacteria seed liquid and carrying out fed-batch fermentation; and (3) during the process of fed-batch fermentation of facultative anaerobic bacteria, controlling the pH value in the fermentation process of the facultative anaerobic bacteria to be in a range of 6 to 9 in an illuminated bioreactor by using the prepared microalgae seed liquid having undergone enlarged culture in step (1) as an alkali neutralizing agent for bacterial fermentation and carrying out coupled culture of the facultative anaerobic bacteria and autotrophic microalgae. The method provided by the invention has the advantages of increased harvest yield of the autotrophic microalgae, an improved utilization rate of an inorganic carbon source, increased content of microbial lipid, a simplified culture apparatus and the like.

The invention discloses a two-dimensional material-based flower-shaped VS2@ Ti3C2 nano composite material, which is characterized in that nano flower-shaped VS2 is used as a load, and a two-dimensional Ti3C2 nanosheet is used as a matrix material, so that a stable three-dimensional space structure is formed; the two-dimensional Ti3C2 nanosheet is a nanosheet with the sheet diameter of about 1.0-2.0 [mu] m and the thickness of about 50-100 nm, and the nanoflower-shaped VS2 uniformly grows on the two-dimensional Ti3C2 nanosheet to form a stable carrying structure. The invention further discloses a preparation method of the nano composite material, and the preparation method is high in feasibility, simple in preparation process and high in repeatability. The invention also provides an application of the nano composite material in photo-thermal seawater desalination. The solar photo-thermal conversion material layer has the advantages of high stability, large light absorption surface area, high thermal efficiency, salt accumulation resistance and the like.

The invention relates to an Au/M1-M2-Ox/Al2O3 nano-gold catalyst for catalyzing oxidation of CO in a CO2-rich atmosphere and a preparation method of the Au/M1-M2-Ox/Al2O3 nano-gold catalyst. Accordingto the preparation method disclosed by the invention, an Al2O3 carrier is modified by a method of adding M1Ox and M2Ox, and the prepared M1-M2-Ox/Al2O3 carrier has fewer strong base sites and is richin active oxygen species, so the Au/M1-M2-Ox/Al2O3 catalyst is prepared. Testing is conducted in an atmosphere of CO2 with a concentration of 60 vol.% to evaluate the activity and stability of the catalyst. Experimental results show that the catalyst provided by the invention has high CO catalytic oxidation activity in the CO2-rich atmosphere, has excellent CO2 accumulation resistance and excellent reaction stability, and has good application potential in CO2-rich scenes such as CO2 lasers.

The invention discloses a rapid cultivation method of oleaginous microorganisms. The method includes the steps of: (1) cultivating an oleaginous yeast seed liquid; (2) cultivating an autotrophic microalgae seed liquid; and (3) inoculating the oleaginous yeast seed liquid and the autotrophic microalgae seed liquid into a closed photobioreactor with a built-in membrane separation device to carry out semi-mixing culture, culturing the oleaginous yeast in the membrane separation device, and subjecting the autotrophic microalgae to photosynthesis growth in the photobioreactor outside the membrane separation device, wherein the medium composition and culture condition are the same in the two reactors, and supplementing organic carbon source required by the growth and metabolism of the oleaginous yeast cells in the cultivation process. The photobioreactor also comprises a guide shell, the membrane separation device is arranged in the guide shell, and an outlet of the guide shell is leveling with the outlet of the photobioreactor; and the photobioreactor comprises a reflective membrane pasted on the outer surface of the guide shell. The method has the advantages of increasing the yield of autotrophic microalgae and oleaginous yeast cells, the utilization rate of an inorganic carbon source (CO2), and oil content of the microorganisms, and simplifying the culture device.

The invention discloses an enclosed culture method of microalgae. The method includes the steps of: (1) cultivating a facultative anaerobic bacteria seed liquid; (2) cultivating an autotrophic microalgae seed liquid; and (3) inoculating the facultative anaerobic bacteria seed liquid and the autotrophic microalgae seed liquid into a closed photobioreactor with a built-in membrane separation device to carry out semi-mixing culture, fermenting the anaerobic bacteria in the membrane separation device, and subjecting the autotrophic microalgae to photosynthesis growth in the photobioreactor outside the membrane separation device, wherein the medium composition and culture conditions are the same in the two reactors, and supplementing organic carbon source required by the growth and metabolism of the facultative anaerobic bacteria in the culture process. The method has the advantages of increasing the yield of autotrophic microalgae, the utilization rate of an inorganic carbon source (CO2), and oil content of the microorganisms, and simplifying the culture device.

The invention discloses a method and agent for inhibiting cadmium enrichment in rice and aims to solve technical problems of poor effects in reduction of cadmium enrichment and high cost of existing agents. Per 1L of the agent is prepared from 60-90mg of sodium selenite and 10-30mL of Anngro which is a product produced by the South African Nilesco 882 Limited liability Company. The agent for inhibiting cadmium enrichment in rice is sprayed in a tillering stage, a heading stage and/or an early filling stage of rice, and the amount of spraying for each time is 0.1L/m<2>. The preparation method is simple, convenience in use is achieved, and demands of large-scale industrial production are met.

The invention discloses a production method for lipid through mixed culture of microbes. The method comprises the following steps: (1) culturing facultative anaerobic bacteria seed liquid and carrying out enlarged culture until the OD value of biomass is 5.0 to 15.0; (2) culturing autotrophic microalgae seed liquid and carrying out enlarged culture until the OD value of biomass is 2.0 to 10.0; and (3) mixing facultative anaerobic bacteria having undergone enlarged culture and autotrophic microalgae having undergone enlarged culture and carrying out mixed culture in an illuminated bioreactor. Compared to the prior art, the method provided by the invention has the advantages of increased harvest yield of autotrophic microalgae, an improved utilization rate of an inorganic carbon source (CO2), increased content of microbial lipid, a simplified culture apparatus and the like, and meanwhile, the method exerts small influence on the fermentation process of the facultative anaerobic bacteria, thereby realizing synchronous culture of the facultative anaerobic bacteria and the autotrophic microalgae.

The present invention relates to use of Aegilops tauschii HMT (AetHMT1) gene, and belongs to the technical field of functional identification of genes. The present invention provides the use of AetHMT1 gene in improving plant stress resistance, total antioxidant capacity, selenium tolerance, and plant selenium absorptive and accumulating capacities. The AetHMT1 gene improves plant stress resistance, total antioxidant capacity, and selenium tolerance, and enhances plant selenium absorptive and accumulating capacities.