67 results about "Strontium ions" patented technology

The invention provides a mineralization composition as well as a preparation method and application thereof. The mineralization composition comprises modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine. The strontium ion dissolution amount of the modified celestite is 50 to 55 mg / L; the strontium ion dissolution amount of the modified strontium-containing dolomite is 15 to 20 mg / L; the metasilicate ion dissolution amount of the modified medical stone is 30 to 35 mg / L; the metasilicate ion dissolution amount of the modified zeolite is 40 to 45 mg / L; the metasilicate ion dissolution amount of the modified tourmaline is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified wollastonite is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified serpentine is 10 to 15 mg / L. The mineralization composition can stably and enduringly release strontium ions and metasilicate ions, and also can adjust the water quality to alkalescence, so that the water quality reaches the national drinking water standard, and safe and healthy drinking water can be provided for users.

The invention provides a composite hydrogel for infectious bone defect repair and a preparation method thereof, and belongs to the technical field of bone defect repair, the composite hydrogel comprises a three-dimensional porous network structure hydrogel and a bioactive unit, and the bioactive unit is loaded in the three-dimensional porous network structure hydrogel; the hydrogel with the three-dimensional porous network structure is prepared from photo-crosslinked methacrylated silk fibroin and nano-hydroxyapatite; the bioactive unit comprises a strontium metal organic framework loaded with curcumin. According to the invention, the photo-crosslinked methacrylated silk fibroin provides excellent biocompatibility; as an ion / drug dual carrier, the strontium metal organic framework can continuously release strontium ions and bidirectionally regulate bone metabolism (promoting osteogenesis and inhibiting osteoclast), and the porous structure of the strontium metal organic framework can efficiently load a hydrophobic drug curcumin (Cur). Curcumin has strong antibacterial and anti-inflammatory functions; the nano-hydroxyapatite can obviously enhance the mechanical strength of the hydrogel.

The invention relates to the technical field of fuel cell new materials and new energy, in particular to an A-site high-entropy perovskite cathode material and a preparation method thereof. According to the technical scheme, the material comprises the following raw materials: Pr (NO3) 3.6 H2O, La (NO3) 3.6 H2O, Co (NO3) 2.6 H2O, CaCO3, BaCO3, SrCO3 and citric acid. The molar ratio of the praseodymium ions to the lanthanum ions to the cobalt ions to the calcium ions to the barium ions to the strontium ions to the citric acid is 1: (1-2). According to the invention, the A site of the perovskite material is doped with a plurality of elements, a rapid quenching preparation process is combined, the oxygen vacancy concentration and the proton conduction path can be optimized, the ORR activity and the conductivity can be improved, and excellent electrochemical performance and thermal stability can be shown through the synergistic effect of the plurality of elements and structural regulation and control, so that the performance of the cell can be improved.

The invention belongs to the technical field of medical biomaterial engineering application, and particularly relates to a bone repair scaffold for promoting diabetic bone defect repair. The stent main body is provided with a functional material, and the functional material comprises one or a combination of more than two of the following components: platelet-derived growth factors, copper ions and strontium ions; the weight part ratio of the platelet-derived growth factor to the copper ions to the strontium ions is (0.001-0.1): (0.005-1): (0.01-10). According to the bone repair scaffold provided by the invention, through the synergistic effect of the platelet-derived growth factor (PDGF-BB) and trace metal copper and strontium, the bone defect and osteoporotic bone defect of a diabetic patient are treated.

The invention provides a positive electrode electrolyte, a preparation method of the positive electrode electrolyte and a flow battery, the positive electrode electrolyte comprises: an active material suitable for providing positive pentavalent vanadium ions; a dispersant; the cations comprise at least one of calcium ions, magnesium ions, sodium ions, barium ions, strontium ions and ammonium ions; and chloride ions. Therefore, the positive electrode electrolyte has relatively good stability, the solubility and the dispersity of positive pentavalent vanadium ions in the positive electrode electrolyte can be improved, precipitation is avoided, and the capacity and the energy density of the battery are further improved.

A kind of tin lead perovskite photodetector based on introducing guanidinium ion and strontium ion and preparation method thereof, belong to perovskite photoelectric device technical field.The photodetector described in the application is composed of ITO conductive glass anode, PTAA anode buffer layer, tin lead perovskite film introducing guanidinium ion and strontium ion, C 60 / BCP cathode buffer layer, Cu cathode from bottom to top. + When A-site cation is doped with ion in perovskite, the carrier lifetime of perovskite material can be improved, and the open-circuit voltage of the device can be improved, the carrier diffusion length can be increased, the defects can be reduced, and the stability of the device can be improved;Sr 2+ Doping with ion in B-site of perovskite can increase conductivity, improve stability and optimize electrode performance, ultimately achieve the effect of passivating defects, reducing the capture of electrons by traps and improving photoelectric conversion efficiency, and the optimization effect mainly reflects on light and dark current and external quantum efficiency, and a high-performance photodetector is obtained.

The invention provides application of strontium ions in improving and / or promoting accumulation of tanshinone components and / or salvianolic acid components, and belongs to the technical field of hairy root induction. The invention provides application of strontium ions in improving and / or promoting accumulation of tanshinone components and / or salvianolic acid components. Salvia miltiorrhiza hairy roots are induced through different strontium ion concentrations, the influence of strontium ions on salvia miltiorrhiza quality components is researched, and a theoretical basis is expected to be provided for salvia miltiorrhiza quality improvement and strontium fertilizer development. The result of the embodiment shows that 10-100 [mu] mol / L of strontium ions are added in the salvia miltiorrhiza hairy root induction process, accumulation of tanshinone components and salvianolic acid components in the salvia miltiorrhiza hairy roots can be improved and promoted, and then the quality components of salvia miltiorrhiza can be improved.

This invention discloses a softening treatment device and method for high-temperature oilfield wastewater, relating to the field of wastewater treatment technology. Oilfield wastewater enters a pre-desorption tank for impurity removal. The barium-strontium adsorption tank contains, from top to bottom, a fine quartz sand layer, a chelating resin layer, and a coarse quartz sand layer. The silicate pre-desorption tank contains an acid-base regulator, a dispersant, and a magnesium oxide suspension. The carbonate softening tank contains a dispersant, a coagulant aid, a soda ash solution, and a chelating agent. The stabilizing tank contains, from top to bottom, a modified activated carbon layer and an exchange resin layer. This invention uses the pre-desorption tank to initially separate oil, suspended solids, and corrosion products. A specialized chelating resin selectively adsorbs barium-strontium ions. In the silicate pre-desorption tank, pH is precisely controlled and magnesium oxide is added to directionally generate settleable magnesium silicate flocs. In the carbonate softening tank, crystal form control and coagulation aid work synergistically to promote the precipitation of calcium and magnesium in the form of large calcite particles.

A coated nanocluster (10) comprises: a core (20) including an aggregate of magnesium oxide particles; and a shell (30) covering the core (20). The shell (30) has a coating layer (31) containing at least one of a nitrate and a nitrite, and carbonate particles (32) dispersed in the coating layer (31). At least one of the nitrate and the nitrite contains an alkali metal ion. The carbonate particles (32) contain at least one selected from a calcium ion, a strontium ion, and a barium ion. The molar ratio of the carbonate particles (32) constituting the shell (30) to the magnesium oxide particles constituting the core (20) is more than 0.005 and 0.015 or less.

The invention relates to the technical field of functional fertilizers, and discloses a heavy metal and insect disease double-effect regulation type organic fertilizer and a preparation process thereof, the fertilizer is a particle with a three-layer structure of core-inner layer coating-outer layer coating; the core is prepared from a composite passivation functional body, an organic nutrition matrix and a binder; the composite passivation functional body is a flavone-modified functional biological porous carrier loaded with strontium ion-doped nano-hydroxyapatite, and is used for fixing soil heavy metals and regulating and controlling rhizosphere micro-ecology; the inner-layer coating is prepared from wood vinegar, the outer-layer coating is prepared from chitosan oligosaccharide and sodium alginate, and the layered structure realizes sequential release of immune induction substances and synergistically induces plant resistance. Through specific structural design and component synergy, triple effects of heavy metal fixation, rhizosphere micro-ecological regulation and control and plant disease and insect pest induced resistance are achieved, and the effect is definite.

The application relates to a strontium mineralization filter element and a preparation method thereof and a water purifier. The strontium mineralization filter element comprises an inner layer and an outer layer arranged on the outer surface of the inner layer, the outer layer is used for being communicated with a water inlet, the inner layer is used for being communicated with a water outlet, the inner layer comprises silicate ore powder, and the outer layer comprises strontium ore powder; the mass ratio of the strontium ore powder to the silicate ore powder is 1-6:1. The strontium mineralization filter element can adjust the inhibition effect of silicate on the dissolution of strontium ions during the static state of the strontium mineralization filter element, so that the strontium ion concentration of the first cup of water after the strontium mineralization filter element is static can meet the safety upper limit requirement, and the strontium concentration of the produced water during the water passing period of the strontium mineralization filter element can meet the design lower limit requirement.

The utility model relates to the technical field of scale prevention, in particular to scale prevention equipment in the evaporation process of drilling and production wastewater, which comprises a first primary hardness removal reaction chamber, a water inlet pipeline is fixedly connected to the left side surface of the first primary hardness removal reaction chamber, and a pipeline mixer is fixedly connected to the outer surface of the water inlet pipeline. The outer surface of the pipeline mixer is fixedly connected with an alkali liquor adding device. The device is reasonable in structure, related processes of deep hardness removal of phosphate and synergistic ammonia nitrogen removal are added on the basis of a dual-alkali process, scaling ions in the drilling and production wastewater can be more efficiently removed, meanwhile, the ammonia nitrogen concentration of produced water is reduced, the total hardness of the drilling and production wastewater treated by the device can be reduced from 1200-1500mg / L to below 20mg / L, and the treatment effect of the drilling and production wastewater is improved. The concentration of strontium ions is reduced from 60-80 mg / L to 30 mg / L or below, and the concentration of ammonia nitrogen is reduced from 30-40 mg / L to 15 mg / L or below, so that the scaling of the evaporator is effectively reduced, and meanwhile, the cooperative treatment of the ammonia nitrogen is realized.

This invention discloses a tetrachloroaluminate-modified type A molecular sieve, its preparation method, and its application. The invention uses fly ash cenospheres as the main raw material to prepare a type A molecular sieve. Through modification with a mixture of fly ash and tetrachloroaluminate, it exhibits excellent adsorption performance for cobalt, cesium, and strontium ions. The type A molecular sieve prepared in this application has a good synergistic effect with tetrachloroaluminate, effectively solving the problems of complex processes, high costs, and poor adhesion of existing molecular sieve adsorbent preparation methods in the market. 137 Cs, 60 Co, 90 This method addresses the problem of low adsorption rates of major hazardous nuclides in radioactive wastewater such as Sr, and can be used to adsorb radionuclides in nuclear wastewater.

The invention relates to the technical field of oral care products, in particular to an anti-acid repairing oral care composition, application thereof and an oral care product containing the composition. The anti-acid repairing oral care composition comprises strontium ions and a rhizoma drynariae extract, the preparation method comprises the following steps: mixing soluble strontium salt with water to obtain a strontium ion system; mixing the rhizoma drynariae extract with a humectant to obtain a rhizoma drynariae system; and mixing the strontium ion system and the rhizoma drynariae system, and performing ultrasonic treatment. The anti-acid repairing oral care composition can be applied to preparation of oral care products including toothpaste. According to the technical scheme, on the premise that potential allergens are prevented from being introduced and the stability of the product in the storage and use process is ensured, the bioavailability and the acting effect of strontium ions are effectively improved, and then the technical problem that the bioavailability and the acting effect of the strontium ions of the strontium-containing anti-acid repairing oral care product are limited is solved; and the method has ideal application and popularization prospects.

The invention discloses a preparation method and an application of a bone targeting catechin-strontium metal polyphenol nano particle. The system takes a metal-polyphenol network (MPN) formed by coordination self-assembly of strontium ions and catechin as a core, and tetracycline is modified on the surface of the MPN to construct a bone targeting functional layer. The MPN structure can significantly enhance the loading efficiency and physiological stability of catechin, and the tetracycline modification on the surface endows the nanoparticles with excellent bone targeting ability. When reaching an osteoporosis focus, the nanoparticles can respond to a local weakly acidic microenvironment and controllably release catechin, and exert antioxidant and anti-inflammatory effects, thereby reversing a pathological microenvironment unfavorable for bone regeneration. Meanwhile, the MPN skeleton is gradually degraded in vivo, and the released Sr < 2 + > can promote proliferation and differentiation of pre-osteogenic cells, inhibit the activity of osteoclasts and promote formation of new bones. The system integrates bone targeting, microenvironment response drug release, immunoregulation and ion regulation treatment, and provides a new strategy for precise treatment of osteoporosis.

The application discloses a preparation method of a near-beta TLM titanium alloy dealloying / chronological functional surface, and the method comprises the following steps: 1, heat treatment to obtain a dual-phase microstructure TLM titanium alloy substrate; 2, electrochemical dealloying to obtain a hierarchical micro-nano porous surface structure; 3, preparation of a complex solution; 4, chemical deposition of the complex solution to construct an osteogenesis and vascularization functional layer on the hierarchical micro-nano porous surface structure; and 5, electrostatic adsorption to construct an antibacterial functional layer. The osteogenesis and vascularization functional layer and the antibacterial functional layer are introduced on the dealloyed surface of the TLM titanium alloy, the surface is endowed with the chronological expression characteristics through controllable degradation release, the positive electricity and the porous structure of polylysine are used to realize synergistic antibiosis, the tannic acid induced strontium ion controllable release improves the osteogenesis and vascularization performance, the hierarchical micro-nano porous structure of the surface is beneficial to the formation of good bone bonding, the TLM titanium alloy is endowed with early antibiosis, medium and long-term osteogenesis promotion and excellent bone integration characteristics, and is used for bone defect repair.

The invention provides a preparation method and application of a fiber material with a nanopore structure. The preparation method of the fiber material with the nano-pore structure comprises the following steps: preparing polyether-ether-ketone fibers, constructing a chelate coating formed by chelating phytic acid and strontium ions on the surfaces of the polyether-ether-ketone fibers, and carrying out electron bombardment treatment on the chelate coating to form the nano-pore structure on the surfaces of the chelate coating. The application is that the fiber material with the nano-pore structure is woven into the artificial ligament fabric. According to the invention, the biological activity of strontium, the chelation function of phytic acid and the physical advantages of a nano-pore structure are creatively combined to realize a synergistic effect of multiple functions, continuous and controllable strontium ion release can be provided, osteogenesis biochemical signals can be activated, bionic physical attachment points are provided for cells, cell behaviors are guided, and the bioactivity of the cells is improved. The composite material can be used for adjusting the microenvironment around the implant and relieving oxidative stress injury, provides a novel solution and material for promoting tendon-bone healing and bone regeneration, and has great popularization and application values.

The invention relates to a large-scale marking method for released small-specification fries based on fin ray strontium marking, which comprises the following steps of: in a fish fry breeding stage, performing strontium marking on the small-specification fries for several hours by increasing the concentration of strontium ions in seawater in a breeding pool, so that fish fin rays form a'high-strontium marking ring '; and after the marked fish is recaptured, cutting fin rays of the marked fish to detect the content of the strontium element. The method does not depend on otolith, is factory-like, is low in marking cost, and does not cause lethal injury to fishes during sampling.

The invention discloses a curcumin-strontium nanoparticle loaded silk fibroin / polycaprolactone electrospun membrane and a preparation method and application thereof, the preparation method comprises the following steps: S1, dissolving a strontium source compound in a polyvinylpyrrolidone solution, adding curcumin, and continuously stirring to obtain a curcumin-strontium solution; s2, dialyzing the curcumin-strontium solution, and washing and drying a product to obtain curcumin-strontium nanoparticles; s3, dissolving the curcumin-strontium nanoparticles in a spinning dispersant, and adding silk fibroin and polycaprolactone to obtain a spinning solution; and S4, carrying out electrostatic spinning on the spinning solution to obtain the silk fibroin / polycaprolactone electrospun membrane loaded with the curcumin-strontium nanoparticles. According to the invention, natural polyphenol compound curcumin and strontium ions are coordinated to synthesize curcumin-strontium nanoparticles, and the curcumin-strontium nanoparticle loaded silk fibroin / polycaprolactone electrospun membrane is constructed in combination with an electrostatic spinning process. The electrospun membrane has good surface morphology, appropriate degradation rate and excellent mechanical strength, and can synergistically promote osteogenic differentiation of jaw bone marrow mesenchymal stem cells.

The application belongs to the technical field of adsorbing materials, and particularly relates to a high-selectivity strontium adsorbing material, a preparation method and application. The preparation method of the high-selectivity strontium adsorbing material comprises the following steps: loading rare earth ions on collagen fibers to obtain an intermediate material; and reacting an oxalate salt and a dimethylamine cation mixed solution with the intermediate material to generate a MOF crystal material with cavities in situ. The application takes dimethylamine cations as exchange ions, and the crystal structure formed by the coordination of rare earth ions and oxalate ions has a cavity size matching the hydrated ion radius of strontium, and has high selectivity to strontium ions, so that the strontium ions can be removed with high selectivity in the presence of various ions.

The invention discloses a carboxylated synanthrin strontium compound for relieving osteoporosis and a preparation method thereof, and relates to the technical field of pharmacy, the preparation method comprises the following steps: dissolving synanthrin in anhydrous DMF, adding triethylamine and succinic anhydride, carrying out a stirring reaction, adding absolute ethyl alcohol into the obtained reaction liquid, carrying out static settlement, centrifuging, and carrying out vacuum drying to obtain the carboxylated synanthrin strontium compound for relieving osteoporosis. The preparation method comprises the following steps: washing and drying, dissolving in water, dialyzing to remove impurities, freeze-drying, mixing the obtained carboxylated synanthrin solution with a SrCl2. 6H2O aqueous solution, adjusting the pH value, stirring the obtained mixed solution for reaction, adding absolute ethyl alcohol into the obtained reaction solution, standing, precipitating, centrifuging, washing, performing vacuum suction filtration, and finally freeze-drying to obtain the product. Compared with an existing strontium preparation, CIN-Sr has obvious advantages. The natural polysaccharide carrier not only solves the problems of low bioavailability and gastrointestinal stimulation of free strontium ions, but also enhances the bone formation promoting activity through the polysaccharide-metal synergistic effect.

The invention provides an anti-blue-light lens containing perovskite quantum dots. The anti-blue-light lens at least comprises a base material and the perovskite quantum dots dispersed in the base material, the chemical formula of the perovskite quantum dot is CsPb (BrCl) 3: Sr, wherein Sr is strontium ions doped into perovskite crystal lattices; the emission peak of the perovskite quantum dot is located in the wave band range of 480-510 nm, the half-peak width is not larger than 25 nm, and harmful blue light in the wave band of 415-445 nm can be absorbed and subjected to light conversion; in addition, the perovskite quantum dots also generate a synergistic absorption effect on part of red light and green light in transmission light, so that three primary colors of red, green and blue are synchronously attenuated, thereby reducing lens yellow color cast caused by blue light reduction, and realizing consideration of blue light prevention performance and visual color balance.

The application provides a strontium-doped polypeptide hydrogel and a preparation method, a composite biological scaffold and an application, and belongs to the technical field of biomedical materials.The strontium-doped polypeptide hydrogel comprises a three-dimensional nanofiber network formed by self-assembly of polypeptide phosphonated derivatives, and the three-dimensional nanofiber network is loaded with strontium ions.The three-dimensional nanofiber network is formed by self-assembly of strontium ions and polypeptide phosphonated derivatives, a novel hydrogel with mechanical adaptability, controllable degradability and bidirectional regulation function of osteogenesis-osteoclast is obtained, local targeted delivery of strontium ions is realized, and the functional regeneration of osteoporotic bone defects is realized in cooperation with the bone adhesion properties of polypeptides.

The invention belongs to the technical field of electronic materials, and discloses a magnesium-strontium double-doped calcium fluoride crystal and a preparation method and application thereof.The method comprises the steps that firstly, disodium ethylene diamine tetraacetate is chelated with calcium and magnesium ions, and the calcium and magnesium ions and villiaumite are subjected to a coordination exchange reaction to prepare a magnesium-doped calcium fluoride microsphere precursor; regulating and controlling hydrolysis of 3-aminopropyltriethoxysilane through an absolute ethyl alcohol-deionized water mixed solvent, and realizing uniform anchoring and deposition of strontium ions by virtue of an interface connection effect of the 3-aminopropyltriethoxysilane, so as to construct a magnesium-strontium double-doped precursor with a core-shell structure; carrying out hot pressed sintering in a CF4 / Ar mixed atmosphere to obtain a high-density polycrystalline blank; and finally, finishing crystal oriented growth by adopting a Bridgman-Stockbarger method. Through the synergistic effect of the components in the whole process, gradient uniform doping of magnesium and strontium ions is achieved, lattice distortion is effectively eliminated, the optical uniformity, the anti-laser-damage threshold value and the mechanical stability of the crystal are improved, and the prepared crystal can be widely applied to manufacturing of special electronic materials such as semiconductor wafers and the like and has good industrialization prospects.

The invention belongs to the technical field of marine ecological protection and aquaculture, and discloses an intervention method for relieving acid etching damage of shellfish larvae, according to the method, by adding strontium ions (Sr) with different concentrations into seawater, the malformation rate of the shellfish larvae under the acidification condition can be effectively reduced, the shell length, the mechanical property and the calcified gene expression level can be improved, and the acid etching damage of the shellfish larvae can be relieved. Therefore, the embryo shell forming ability and the acid corrosion resistance are enhanced; according to the invention, Ruditapes philippinarum, Crassostrea sikamea and Pinctada martensii are used as representatives, strontium intervention experiments are respectively carried out in seawater with pH values of 8.1, 7.7 and 7.4, and results show that a proper amount of strontium can significantly enhance the hardness and toughness of shells, and a more stable Sr-Ca eutectic structure is formed by partially replacing Ca in the shells, so that the stress resistance of larvae is improved. The method is quick in effect, wide in application range and suitable for embryo shell protection and cultivation stress resistance enhancement in the cultivation process of various shellfish seedlings.

The invention belongs to the field of lithium ion batteries, and particularly relates to a strontium-doped modified lithium ferrous silicate positive electrode material, the chemical formula of the strontium-doped modified lithium ferrous silicate positive electrode material is Li2FexSrySiO4 / C, x is more than or equal to 0.95 and less than or equal to 0.99, and y is more than or equal to 0.01 and less than or equal to 0.05. Meanwhile, the invention also discloses a preparation method of the material, which comprises the following steps: dispersing a lithium source compound, an iron source compound, a silicon source compound, a strontium source compound and a carbon source compound in absolute ethyl alcohol, carrying out ball milling, fully and uniformly mixing, carrying out vacuum drying, and calcining in a box-type furnace in an inert gas environment. Strontium ions are introduced through doping to replace ferrous ions in the lithium ferrous silicate positive electrode material, an original ion channel is widened, a lithium ion migration energy barrier is reduced, rapid ion migration is formed in the charging and discharging process, the specific discharge capacity of the material is improved, and the specific discharge capacity of the material is improved by inhibiting crystal phase change of the lithium ferrous silicate positive electrode material. Lattice distortion and fracture are relieved, and the rate and cycle performance of the material are improved. Meanwhile, the invention further discloses application of the material.

The application belongs to the technical field of biomedical materials, and provides a composite gel loaded with strontium ions / zoledronic acid and a preparation method thereof, which comprises the following steps: preparing thiol-modified sodium hyaluronate and double bond-modified carboxymethyl chitosan; preparing strontium ion-doped mesoporous silica microspheres, thiol-modified strontium ion-doped mesoporous silica microspheres and thiol-modified strontium ion-doped mesoporous silica microspheres loaded with zoledronic acid in sequence; dissolving the thiol-modified sodium hyaluronate and the double bond-modified carboxymethyl chitosan in deionized water respectively, and then stirring and mixing the thiol-modified sodium hyaluronate, the double bond-modified carboxymethyl chitosan and the thiol-modified strontium ion-doped mesoporous silica microspheres loaded with zoledronic acid, and adding a photoinitiator and irradiating under ultraviolet light. The composite gel prepared by the application integrates mechanical support, biocompatibility, intelligent drug release and synergistic osteogenesis / angiogenesis, and can be applied to the preparation of high-performance osteoporotic bone defect repair materials.

This invention discloses a deoxyribozyme probe for recognizing strontium ions and its applications, belonging to the field of deoxyribozyme probe technology. The nucleotide sequence of the deoxyribozyme probe provided by this invention is any one of the sequences shown in SEQ ID NO:1 to SEQ ID NO:9. Specifically, it is a cis-structured deoxyribozyme probe composed of a deoxyribozyme and a substrate chain with a fluorescent group and a quenching group. The substrate chain sequence is shown in SEQ ID NO:10, and the deoxyribozyme sequence is any one of the sequences shown in SEQ ID NO:17 to SEQ ID NO:25. The deoxyribozyme probe provided by this invention can efficiently and specifically recognize strontium ions, thereby achieving accurate detection of the target ion, with a strontium ion response concentration of 2 mM or higher. This probe has good application prospects in the fields of biosensing and ion detection.

The invention provides a combined monitoring method for Sr-90, Sr-89, Ni-63 and Fe-55 in liquid effluent, and particularly relates to the technical field of radioactive substance detection. The method comprises the following steps: carrying out sample pretreatment by adopting a resin column array; the liquid effluent is pretreated, and strontium ions, iron ions and nickel ions in the liquid effluent are enriched in a first cation resin column; leaching the first cationic resin column with a nitric acid solution, and collecting the leacheate in a temporary storage tank after the leacheate sequentially passes through an anion resin column, a strontium resin column and a DGA resin column; then sequentially desorbing the TRU resin columns to obtain an Fe-55 desorption solution; the strontium resin column and the DGA resin column are desorbed, and Sr-89 desorption liquid and Sr-90 desorption liquid are obtained respectively; desorbing the nickel resin column to obtain a Ni-63 desorption solution; and the activity of Fe-55, the activity of Sr-89, the activity of Sr-90 and the activity of Ni-63 are measured. According to the invention, combined measurement of multiple nuclides of a single sample can be realized, the multi-nuclide monitoring efficiency is improved, and the monitoring cost is reduced.

The invention relates to the technical field of dental and orthopedic implants, in particular to a zirconia osseointegration implant material and a preparation method thereof. Aiming at the problems of strong biological inertness and slow early-stage osseointegration of the zirconium oxide ceramic surface, the preparation method comprises the following steps: cleaning a zirconium oxide matrix and carrying out alkaline activation; forming a polydopamine adhesion bottom layer; branched polyethyleneimine is fixed to enhance the amino density; constructing a network layer through alternate coordination of phytic acid and calcium / strontium ions; strontium doped hydroxyapatite nano particles are immobilized; finally, biomimetic mineralization is carried out in simulated body fluid. According to the method, a micro-nano composite active interface is formed, the biological activity, ion release controllability and osseointegration capability of the material are remarkably improved, and osteoblast response is promoted.