216results about How to "Prevent outbreak" patented technology

System and methods for creating shaped, non-circular boreholes in rocks especially for use with geothermal heat pump applications and for increasing wellbore support in applications such as horizontal oil and gas drilling are described. The systems and methods when applied to geothermal heat pumps create an elliptical shaped hole that is optimized for placing heat transfer tubes with a minimum of grout used. The significantly reduced cross-sectional area of the elliptical borehole also increases the overall drilling rate in rock and especially in hard rocks. In horizontal hard-rock drilling, creation of a horizontal non-circular borehole or modification of a circular borehole to a non-circular geometry is used to stabilize the borehole prior to casing insertion, and may also allow the use of lower mud pressures improving drilling rates. The system uses a non-contacting drilling system which in one embodiment uses a supersonic flame jet drilling system with a movable nozzle that swings between pivot points. In a second embodiment the elliptical shaped hole is created by an abrasive fluid or particle bearing-fluid or air jet drill that moves between pivot points. In another embodiment a non-contacting drill can use dual parallel nutating nozzles that create a pair of overlapping circular holes. The non-circular shaped hole is created by either the high temperature flame or water-particle jet or chemically active fluid jet as it removes rock material by erosion, dissolution and or thermal spalling. Modifications of circular boreholes to a generally elliptical shape can also be done using milling or jetting techniques.

A system and method for treating ballast water within an ocean going vessel by generating hypochlorite for treating the ballast water. The system comprises one or more hypochlorite electrolytic cells in fluid communication with a stream of ballast water. A chlorine analyzer is positioned downstream from the electrolytic cells to determine the chlorine concentration of the treated ballast water. A hydrogen separator is connected to the hypochlorite electrolytic cells for venting hydrogen. In the method of this invention, water is taken aboard the ship for ballast in one port. A treatment stream is separated from the ballast water stream and piped to hypochlorite electrolytic cells. Hypochlorite is generated into the treatment stream and the hydrogen byproduct is separated by the hydrogen separators. The treatment stream is then reintroduced to the ballast water to eliminate marine species and pathogenic bacteria from ballast water. The ballast water undergoes de-chlorination prior to being discharged into a new port.

A system and process for treating ballast water within an ocean going vessel by generating hypochlorite for treating the ballast water. The system comprises one or more hypochlorite electrolytic cells in fluid communication with ballast water. The total organic carbon content of the ballast water is ascertained and the amount of hypochlorite generated is modulated in response to the total organic carbon content of the ballast water. In one embodiment the system comprises a total organic carbon analyzer for measuring total organic carbon content. In one embodiment of the process of the invention, hypochlorite production is modulated so that the residual halogen-containing oxidizing agent is maintained in the ballast water. In another embodiment of the process, hypochlorite production is modulated to maintain a weight ratio of hypochlorite to total organic carbon in the ballast water ranging from about 1.0 to about 3.0.

The invention provides a polluted sediment ecological coverage carpet capable of inhibiting original algae from revival and growth and an application method thereof, belonging to the field of sediment in-situ restoration and algae control of a eutrophied water body. The invention aims to solve the problems of ecological potential safety hazards, low restoration efficiency, incapability of reutilization and the like in the existing sediment coverage technique. The ecological coverage carpet comprises a thin fiber inverted filter layer, a biological-matrix combined restoration layer, a fabric layer, a quick connection hook, an embedded matrix frame, floaters, stay piles, a microcurrent electrolyzer, solar panels and electrodes. The application method comprises the following steps: analyzing the varieties of algae hypopuses and pollutants in the superficial deposit, selecting the restoration region, laying in the dormancy interval that blue algae do not revive to the water body, analyzing the pollutant content and adsorption characteristics of the adsorptive filter material in the embedded matrix frame, and determining whether to replace the filler or reap the plants. The carpet can be used in sediment improvement and ecological restoration in lakes, ponds, landscape water and other polluted water bodies.

A system and method for treating ballast water within an ocean going vessel by generating hypochlorite for treating the ballast water. The system comprises one or more hypochlorite electrolytic cells in fluid communication with a stream of ballast water. A chlorine analyzer is positioned downstream from the electrolytic cells to determine the chlorine concentration of the treated ballast water. A hydrogen separator is connected to the hypochlorite electrolytic cells for venting hydrogen. In the method of this invention, water is taken aboard the ship for ballast in one port. A treatment stream is separated from the ballast water stream and piped to hypochlorite electrolytic cells. Hypochlorite is generated into the treatment stream and the hydrogen byproduct is separated by the hydrogen separators. The treatment stream is then reintroduced to the ballast water to eliminate marine species and pathogenic bacteria from ballast water. The ballast water undergoes de-chlorination prior to being discharged into a new port.

The invention relates to the field of banana cultivation, in particular to a compound microbial agent for preventing and treating a banana wilt disease and a prevention and treatment method. The compound microbial agent comprises paenibacillus polymyxa, bacillus subtilis, bacillus thuringiensis, pseudomonas stutzeri, bacillus amyloliquefaciens, cold-resistant brevibacteriaceae, trichoderma and metarrhizium anisopliae. By means of a reasonable proportion, all strains are mutually influenced and promoted, and the prevention and treatment effect on the banana wilt disease is greatly improved. The prevention and treatment method of the banana wilt disease can effectively adjust the composition of bacterial colonies in soil, promote growth and propagation of probiotics and antagonistic bacteria in the soil, rapidly restore and stabilize the balance of the bacterial colonies in the soil, prevent and treat occurrence and spread of the banana wilt disease, effectively decrease the occurrence rate of the banana wilt disease and maintain the stable and high yield of bananas.

The invention discloses a green and safe waxberry planting method. The method comprises the three main steps of field planting, management after field planting and fertilization management. According to the green and safe waxberry planting method, due to the way, poison pesticide is not used, hormone and addition agents harmful to the human body are not used, and therefore waxberries can grow in a green and pollution-free environment; in addition, natural ingredients are used for preventing pests and outbreaks of waxberry tree pest diseases, the yield is increased on the premise of ensuring the quality of the waxberries, and the benefit is increased.

The invention belongs to the technical field of environmental protection, and particularly relates to a method and a device for stream guidance and enrichment of blue-green algae in a large water area. With the adoption of the method and the device for the stream guidance and the enrichment of the blue-green algae in the large water area, a certain area which is in shore, and in which the guiding wind is in the downwind direction in the large water area is selected as a blue-green algae stream guidance and enrichment area; a blue-green algae stream guidance and enrichment device is established by utilizing an arched soft algae blocking enclosure and a stream guiding door of which the two sides are in shore; large-scale blue-green algae from outside is guided and gathered to the two sides of the shore by utilizing the arched soft algae blocking enclosure; and the blue-green algae is guided into the enrichment area by utilizing timely opening and closing of the stream guidance door, or the enriched blue-green algae is prevented from blowing and escaping with wind; wind waves in the enrichment area can be reduced by the blue-green algae stream guidance enrichment device, so that the blue-green algae in the enrichment area can always float onto the water surface, and is conveniently to be absorbed and cleared continuously; and in addition, a blue-green algae stream guiding enrichment trap and an efficient algae absorbing area are constructed at one side close to the bottom shore in the blue-green algae stream guidance and enrichment area by utilizing vantage ground, so that the blue-green algae in the enrichment area is further enriched for second time to the area, and is conveniently efficiently absorbed and cleared.

The invention provides a process for producing the oriental lily sterilized seed globule in the bottle, comprising: choosing explant, sterilizing, inducing culture and getting the sterilized stem tip, then breeding culture, subculture, and producing the sterilized seed globule in the bottle directly. The invention produces the sterilized seed globule in the bottle directly to avoid the problem of long period of ball forming and the accumulation of virus existing in the oriental lily, the seed globule can be planted in the soil when out of the bottle, and the survival rate is high. The breeding procedure of the sterilized seed globule is simplified by modifying and optimizing the whole producing procedure for the lily seed globule, and the breeding time of sterilizing the oriental lily is shortened greatly, the quality of seed globule is improved when the producing cost is decreased, which reinforces market competitive power of the domestic self-breeding seed globule and is suitable for the mass production of the oriental lily sterilized seed globule.

The invention discloses a novel crayfish and rice rotation breeding and planting method. The method comprises the following steps: a crayfish fry pond and a breeding pond are built separately in the area ratio being 1:(4-10). Seed crayfish are put into the crayfish fry pond, and after crayfish fries are bred, the crayfish fries in the consistent specification (60-70 crayfish per jin) are caught and then put into the breeding pond in the density of 5,000-8,000 crayfish per mu. After the crayfish fries in the breeding pond grow to be 20 g or above, the crayfish fries are caught in a catch rotation manner that only large crayfish fries are caught, then crayfish fries are caught from the crayfish fry pond and put into the breeding pond after the large crayfish fries in the breeding pond are caught, and accordingly, the breeding density of the breeding pond keeps unchanged. After all the crayfish fries are almost caught, rice is planted in the breeding pond in the traditional planting density. The breeding density of crayfish can be well controlled, burst of diseases caused by high breeding density of the crayfish is avoided, and finally, high-quality commodity crayfish are obtained. The utilization rate of land is increased in the manner of catching and stocking rotation, and better benefits are obtained.

An environmentally-safe method for protecting plants is provided for reducing the use of chemically-synthesized pesticide. Specifically, an anti-microbial and / or anti-viral composition comprising a laccase, a cell of a laccase-producing microorganism or a treated product thereof, and one or more kinds of phenol derivatives each represented by the general formula (I) shown below or a salt of the phenol derivative is provided. Furthermore, a plant disease-preventing agent, seed-sterilizing agent, post-harvest agent, and nutrient solution-sterilizing agent, each containing the composition; and plant disease-preventing method, seed-sterilizing method, post-harvest-treatment method, and nutrient solution-sterilizing method in hydroponics and solid-medium hydroponics using each f the agents are provided. (in this formula, each of R1 to R5 independently represents hydrogen, an alkyl group having 1 to 6 carbon atoms, substituted or unsubstituted alkenyl group having 2 to 6 carbon atoms, alkoxy group having 1 to 6 carbon atoms, substituted or unsubstituted aryl group having 6 to 20 core carbon atoms, carboxyl group having 1 to 10 carbon atoms, carbonyl group having 1 to 10 carbon atoms, or halogen atom, and at least one of R1 to R5 is an alkenyl group having 1 to 10 carbon atoms; provided that at least one of R1 and R5 is not an alkoxy group).

The invention discloses a system for purifying eutrophic water employing artificial flow aeration coupled to a biological film floating bed. The system comprises biofilm colonization, a floating bed, and artificial flow aeration, wherein a biofilm colonization carrier is a soft fiber filler, and is combined with the floating bed to form a biological film floating bed unit; the artificial flow aeration is that a plurality of push flow aerators arranged below the biological film floating bed unit are started towards the same direction to form circulating flow water, and supply oxygen to the water. The system adopts a plurality of biological film floating bed units, which are fixed by an anchor stake, connected by a connecting rod, and arranged in an oval shape; a guide wall is arranged in the middle; the push flow aerators are arranged below the floating bed. Compared with the common biological film floating bed, the artificial flow aeration is increased, the water mobility is enhanced, an independent aeration system does not need to be arranged, the removal efficiency of pollutants are high, the water eutrophication degree can be effectively relieved, and the operation mode can be regulated and controlled according to the dynamic change of water temperature and water quality, and the system is more stable, efficient and energy-saving in operation.

The invention provides a real-time fluorescence PCR kit used for detecting salmonella and detection method thereof. The kit mainly comprises a specific primer, a mixture of fluorescence probe, PCR buffer solution and deoxynucleotide triphosphate, and DNA polymerases, wherein the sequences of the specific primer and the fluorescence probe are as follows: the sequence of the upstream primer is 5'-TTG TCC AGT CRA CRGAYG AA-3', the sequence of the downstream primer is 5'-TCG CGA CGG TTA CGR AAT TC-3', and the sequence of the fluorescence probe is 5'-FAM-TGT CAG CGG CGC TG-MGB-3', wherein the FAM is fluorescence report gene and the MGB is fluorescence quenching gene. The beneficial effects of the invention are mainly as follows: the detection sensitivity of the target bacteria is high, the specificity is good, the false positive rate of conventional PCR amplification is reduced; and the rapid, accurate and specific detection of salmonella can be realized.

The invention provides a new infectious disease automatic early warning method and system, and belongs to the field of epidemic prevention and control. The method comprises the following steps: acquiring all doctor-seeing medical data information of a medical information resource library in a period of time every other preset time; screening suspected aggregation characteristics according to the medical data information; if it is determined that the suspected aggregation feature appears, performing tracking to obtain subsequent medical data information of all patients corresponding to the suspected aggregation feature, and comparing the medical data information and the subsequent medical data information of the tracked patients with all known infectious disease information obtained by themedical information resource library; judging whether the disease of the tracked patient is a new infectious disease or not; and if it is judged that the suspected aggregation feature is a new infectious disease aggregation feature, triggering an emergency response. Whether new infectious diseases appear recently or not is automatically judged, emergency response is generated in the early spreading stage of the new infectious diseases, and the problems that the new infectious disease growth trend is difficult to perceive and response to infectious disease outbreak is slow are solved.

The invention discloses a direct PCR detection method of Bombyx mori nuclear polyhedrosis pathogeny BmNPV, comprising the following steps of: firstly, treating the blood of infected Bombyx mori by ethanol precipitation to remove a PCR reaction inhibitor; designing the PCR primer of a polyhedrin gene according to the genome analysis of the Bombyx mori nuclear polyhedrosis pathogeny BmNPV; carrying out PCR amplification on the polyhedrin gene, adding an anti-PCR reaction inhibitor BSA (Bull Serum Albumin) to a reaction system and simultaneously carrying out PCR reaction by the primer of a Bombyx mori chondriosome CO I gene to make positive control; respectively getting the blood of normal Bombyx mori and the inflected midguts of the Bombyx mori infected with white muscardine, green muscardine, a bacterial disease and a microsporidia disease and then carrying out PCR reaction specification analysis; and detecting the PCR reaction result by agar gel electrophoresis. The whole detection process has simple operation and can be completed only by 4 hours. The disease can be diagnosed at the early stage of BmNPV infection by adopting the direct PCR detection method to carry out periodical sampling detection so as to adopt a measure in time to prevent the disease from happening.

An immunogenic or vaccine composition to induce an immune response or protective immune response against West Nile virus (WNV) in an animal susceptible to WNV. The composition includes a pharmaceutically or veterinarily acceptable vehicle or excipient, and a vector. The vector contains heterologous nucleic acid molecule(s), expresses in vivo in the animal WNV antigen, immunogen or epitope thereof, e.g., WNV E; WNV prM and E; WNV M and E; WNV prM, WNV M and E, WNV polyprotein prM-E, WNV polyprotein M-E, or WNV polyprotein prM-M-E. The composition can contain an adjuvant, such as carbomer. Methods for making and using such a composition, including prime-boost regimes and including as to differential diagnosis, are also contemplated.

The invention discloses a disease-resistant and insect-resistant organic vegetable planting medium. The disease-resistant and insect-resistant organic vegetable planting medium comprises, by weight, 40-45% of decaying medium, 4-6% of thermal insulation material, 5-7% of vermiculite, 40-45% of bio-organic fertilizer, 1-2% of sandy soil, 0.1-0.3% of biological bactericide, 0.1-0.3% of biological insecticide and 1-2% of inorganic compound fertilizer. The disease-resistant and insect-resistant organic vegetable planting medium prepared from the materials in proportion is high in drought resistanceand water retention, the organic fertilizer controlled release property is high, the medium contains sufficient organic matter and mineral substances and has no pollution to the environment, and green and healthy vegetables which are good in quality and free of disease can be cultivated.

The invention relates to a submerged type bubble-free high-efficiency oxygenated water body restoration system, comprising an oxygen supply system and a dissolved oxygen system; the oxygen supply system is used to inject oxygen in the water of the dissolved oxygen system and the dissolved oxygen system is used to release high-concentration oxygen in water body for dissolving oxygen in water. The oxygen supply system comprises an air compressor, an oxygen generator and dissolved oxygen tanks which are connected in sequence by pipelines and convey high-concentration oxygen to dissolved oxygen tanks of the dissolved oxygen system, and the high-concentration oxygen is generated by the oxygen generator and has purity of higher than 90%; the dissolved oxygen system also comprises a submerged pump which conveys water to the dissolved oxygen tanks, the oxygen tanks carries out bubble-free mutual dissolving with the oxygen so as to obtain high-concentration oxygenated water, and the high-concentration oxygen dissolved water is released into the water body through the dissolved oxygen tanks so as to realize bubble-free oxygenation. The system also can be provided with a control system so as to control self starting oxygenation, or is further provided with a monitoring system which adjusts and controls the starting and stopping and the flow rate of oxygenation in real time according to various indexes. The submerged type bubble-free high-efficiency oxygenated water restoration system has characteristics of low power consumption, high efficiency and the like, can effectively reduce the content of nitrogen and phosphorus in water sources and water bodies and can further restrict burst of water bloom.

A system and process for de-halogenating ballast water before releasing the ballast water from the vessel. In one embodiment, the system comprises a means for measuring the halogen content of the ballast water, a reducing agent source in fluid communication with the ballast water, and a means for controlling the amount of reducing agent supplied to the ballast water. In one aspect, the means for measuring the halogen content comprises one or more oxidation / reduction potential analyzers. In another embodiment, the system comprises one or more hypochlorite electrolytic cells for generating hypochlorite to treat the ballast water.One embodiment of the process for de-halogenating ballast water comprises measuring the oxidation / reduction potential of the ballast water and adding one or more reducing agents to the ballast water to de-halogenate the ballast water in response to the measured oxidation / reduction potential. In one aspect, the oxidation / reduction potential is modulated so that excess reducing agent is present in the ballast water.

The embodiment of the invention discloses a nethod for analysing abnormal call, at first, according to the call historical record (CHR) data, the method ascertains the cell of the user when the abnormal call happens; then processes the alarm analysis for the alarm data which is generated by an interface allocation object of the base station in the adjacent time sections or abnormal call happens, positions the reason of abnormal call. The embodiment of the invention discloses a abnormal call analysing device, two methods of preventing the abnormal call and two devices thereof. The invention can improve analysis efficiency of analysing abnormal call.

In a shielding case, a condenser lens condenses a laser beam output by a laser oscillator to inject the laser beam into an entrance end face of an optical fiber disposed posterior to a focusing point of the laser beam. Ventilation of an ambient gas in the shielding case is carried out by ventilating means, and the ambient gas bringing about ionization in the vicinity of the focusing point of the laser beam is eliminated, thereby preventing the outbreak of air breakdown.

The invention provides an L-tryptophan refining method. The method comprises the steps of dissolving crude products in a water and acetic acid mixed solvent; adding an antioxidant, and regulating the pH value; adding activated carbon for decoloration, and then conducting filtration; conducting cooling crystallization, centrifugal collection of crystals and drying to obtain L-tryptophan. The purity of L-tryptophan refined with the method is not lower than 99.5%. Compared with a vacuum concentration recrystallization refining method, the method has the advantages that steam consumption is reduced greatly, and yield each time is increased by over 50%.

The invention discloses a Yunnan Dendrolimus sex attractant attracting core, which is characterized by the following: comprising compounded rubber attracting core carrier, sex attractant dipped into attracting core carrier and carrene; allocating the sex attractant with 0. 1-50mg inverse 5, cis-7-lauric diene alcohol, 0. 1-15mg inverse 5, cis-7-lauric dienoic acetate or cis 5, invert-7-lauric dienoic acetate, 0. 1-10mg inverse 5, cis-7-lauric dienoic aldehyde; comprising antioxidant or / and ultraviolet light absorbent 2-hydroxyl group-4-methoxy benzophenone. This invention can decreases isomerization rate of adjoint diene pheromone in attracting core, which can make sex pheromone discharge slowly and evenly in the carrier.

The invention relates to an auxiliary diagnosis and treatment system based on artificial intelligence. The system at least comprises: a patient client (1), a database (3), a server (4) and a medical care client (2), wherein the patient client (1) can record the residence place information of a patient; the database (3) can store medication data of a specific patient in a medication-related manner;the server (4) is configured to count the medication data of the specific patient for the same disease type so as to obtain the frequency and / or quantity of the same or similar medicines continuouslyand repeatedly taken by the specific patient within a set time period; and under the condition that the server (4) determines that the frequency and / or the quantity of the same or similar medicines continuously and repeatedly taken by the specific patient are / is greater than a set threshold based on the analysis performed by the analysis module of the server (4), the medical care client (2) and / or the patient client (1) send / sends a prompt.

The invention discloses an ecological and environmentally friendly method for controlling pests, which comprises the steps as follows: (1) luring: the pests are attracted by inducing substance or inducing technology; (2) contraceptive sucking: appropriate quantity of mixture of phagostimulant and natural contraceptive for pest sucking is placed; (3) sterile pests competing for mating: the pests sucking the natural contraceptive are sterile, and compete with the pests of the same kind, which do not suck the contraceptive, for mating with opposite sex pests, thereby causing the female pests not to lay eggs or to lay addle eggs so as to reduce the number of the next generation of pests. By means of providing a combination of the natural contraceptive with the substance or technology that has luring ability, the ecological and environmentally friendly method can control the ability of last generation of pests to reproduce next generation of pests so as to reach the purpose of reducing or even exterminating the number of the next generation of pests, so that the purpose of controlling the pests is reached, and simultaneously, the method is safe for environment and personnel.

The invention discloses an underwater multifunctional feeding device for ocean net cage culture. The underwater multifunctional feeding device is suitable for multifunctional underwater feeding of a full-floating net cage, a semi-submersible net cage and a bottom-sitting net cage. The device comprises a cyclone vortex mixer, seawater pipelines, a main feeding pipeline and feedstuff feeding manifolds, wherein the cyclone vortex mixer comprises an air-assisted feed dispersing bin and a seawater turbine bin; the seawater turbine bin comprises a plurality of seawater inlets and a vortex guide plate, and the bottom of the vortex guide plate is connected with the main feeding pipeline; the upper end of each seawater pipeline communicates with the corresponding seawater inlet, and the lower end of each seawater pipeline is connected with a seawater submersible pump immersed in seawater, so that seawater is pumped into the seawater turbine bin to form a vortex rotating downwards, and feed is driven to enter the main feeding pipeline; and the multiple feedstuff feeding manifolds are arranged at the lower end of the main feeding pipeline, so that the feed in the main feeding pipeline can befed into an aquaculture water space in a multi-point mode through the feedstuff feeding manifolds.

The invention discloses an integron In1069 with a sequence as shown in SEQ ID NO.1. The integron is found in a genome of drug-resistant Escherichia coli EC6335. The integron contains a plurality of drug-resistant gene cassettes. Therefore, due to the discovery of the integron disclosed by the invention, a certain guiding effect is provided for clinical medication, some clinically-used antibacterial agents can be favorably reduced, the selective pressure for horizontal transfer of the drug-resistant gene cassettes is reduced, and the outbreak of drug-resistant bacteria is avoided.

The invention provides a blue alga deep well treatment device and a blue alga treatment method. The blue alga deep well treatment device comprises a deep well and a water draining device, the top of the deep well is provided with a water inlet and is inserted to the bottom of water, the water draining device is arranged at the side part of the deep well and is higher than the water bottom, the water draining device is connected with one end of a water draining tube, and the other end of the water draining tube extends to the bottom of the deep well. A hydrostatic pressure formed at the bottom of the deep water by the water guided into the deep well is used to break blue algae in order to form blue alga fragments, and a negative pressure formed by the water draining device guides the blue algae to the bottom of the deep wall and discharges the blue algae from the deep well in order to make the blue algae directly preyed by fish, zooplanktons and benthonic animals in the water, so the high-efficiency ecologic treatment of the blue algae is realized, the blooming of the blue algae is effectively prevented, and the water quality is effectively improved, thereby the blooming of the blue algae is fundamentally prevented, the blue alga pretreatment cost is reduced, and stink is prevented.

The invention relates to a method for detecting alga and colored dissolved organic matters by adopting a flow cytometry. The method comprises the following steps of: (1) alga detection, namely irradiating particles to be detected by a laser beam keeping an angle of 90 degrees with the particles, detecting a forward scattering light (FWC), a side scattering light (SWC) and multi-color fluorescent light of the particles by a detection system, and automatically analyzing by utilizing software, so as to obtain related information such as the fluorescent signal strength of an alga cell, the size of the alga cell and the quantity of the alga cells in unit volume; and (2) detection on colored dissolved organic matters, namely filtering the detected alga particles, irradiating filtrate by a laser beam with the wavelength of 355nm, collecting a light absorption signal and a fluorescent signal of the filtrate in a special wavelength range by the detection system, and carrying out analysis on the colored dissolved organic matters by an intelligent instrument. The method provided by the invention is simple and rapid, the alga and the colored dissolved organic matters (CDOM) in water can be simultaneously continuously detected online, and early warning detection on eutrophication of a water body can be realized.