Since the pure water system as the influent water has a slower water production rate, there must be a water tank as a transition between the pure water system and the ultrapure water system. However, the storage of pure water in the water tank may cause deterioration of pure water quality due to dissolution of materials, contamination of inorganic substances and organic substances in the air, and proliferation of microorganisms, thereby increasing the purification load of the ultrapure water system . In order to make the ultrapure water device have a stable influent water quality, it is very important to control the water quality deterioration of the water tank to a minimum.
1) In the air filter to remove carbon dioxide and air pollutants planktonic microorganisms <br> <br> laboratory air containing pure water quality deterioration, using an organic solvent in the laboratory air containing a volatile organic solvent. When carbon dioxide in the air is dissolved in water, carbonate ions are formed, which greatly reduces the electrical resistivity of the pure water in the water tank, which will increase the load of the anion exchange resin in the ultrapure water system and shorten its service life. In addition, if the pure water in the water tank is mixed with microorganisms and organic substances, it will cause microbial proliferation and re-contamination of organic substances. Therefore, the pure water tank should be in a closed state, because the water tank must be provided with a vent to allow pure water to flow smoothly. Therefore, in order to prevent the pollutants in the air from entering the pure water tank through the vent buckle and the mouth, the air filter is installed. indispensable.
2) to a UV lamp for sterilization while preventing microbial propagation <br> Water purified <br> There are different ways, but still a small amount of residual microorganisms. As long as it remains in the tank, there is a possibility of breeding. Although pure water contains almost no nutrients (organic matter, etc.), there is still the possibility of adapting to microorganisms in a poorly nutritious environment. Therefore, in the process of water purification, there should be procedures related to sterilization.
The sterilizing effect of the medicinal agent and the hot water sterilization is single-time rather than continuous. In contrast, the ultraviolet irradiation sterilization method can continue the sterilization action against microorganisms during the irradiation period. The bactericidal ability of ultraviolet rays is expressed by the intensity of ultraviolet light and the irradiation time. When the microorganisms in pure water are treated with an irradiation dose of 100 mW.s/cm2, the sterilization rate can reach 99.9%. Here, we add UV lamps during the water purification process and test their bactericidal effects. First, we installed an ultraviolet lamp in the water flow line of the pure water system , and used the continuous irradiation method to detect the sterilization effect.
In general, if the ultraviolet light is not used in the water purification process, the number of bacteria in the pure water system will exceed 100 cfu/ml, and the number of bacteria in the pure water system irradiated with ultraviolet light can be reduced to 10 cfu/ml. In other words, if the UV lamp is used in the pipeline of the pure water system, it has a very good effect on reducing the number of bacteria. But after a few days, there was a phenomenon of bacterial proliferation. This is because the reproduction of bacteria in the water tank is not inhibited and the number of bacteria is gradually increased. Therefore, when controlling microorganisms in a pure water system , it is insufficient to irradiate only the ultraviolet rays in the purification process, and the bacterial growth in the water tank should be suppressed at the same time.
Therefore, as stated in the foregoing system, we used ultraviolet light irradiation treatment in pure water pipes and water tanks to detect the effect on the number of bacteria. The irradiation time of the ultraviolet lamp is 10 minutes per day. The results showed that the number of bacteria in the pure water in the pipeline was about 4-10 cfu/ml under ultraviolet light irradiation. Thereafter, the number of bacteria was further lowered under the irradiation of the tank UV lamp. After the UV lamp is irradiated in the water tank, although the number of bacteria is increased by re-injecting pure water , the bacterial growth can be greatly suppressed. From the 70 days after the start of the test, the number of bacteria in the water tank was always kept at an extremely low level, achieving an effective and sustained effect of inhibiting the growth of bacteria.
It can be seen from the foregoing results that the simultaneous use of ultraviolet lamp irradiation in the pure water line and the water tank can minimize the bacteria in the pure water . Bacterial reproduction in the water tank means that bacteria and their metabolic organic matter are transported into the ultrapure water system. Therefore, when purifying ultrapure water , it is necessary to use ultraviolet light irradiation in both the pure water line and the water tank.
In addition, the reproduction of bacteria is likely to occur where the water flow is stagnant. Therefore, the structure of the water tank is also important. The flat bottom tank completely excludes the storage of water and is called the cause of water pollution. In response to this problem, if the bottom of the tank is designed as a sloping structure so that the water can be completely eliminated, it can be solved. If the water tank is placed in the direct sunlight window, the water temperature will rise and it will easily cause the bacteria to multiply. If a water tank with a translucent material is used, algae will be propagated due to the penetration of sunlight. Therefore, these points must be taken into account when installing an ultrapure water system .
3) Â Ultrapure water system must be updated regularly supplies <br> <br> ultrapure water system since the ion exchange resin to organic matter has a certain adsorption capacity, after a certain amount of processing, it must be replaced. In particular, when the pH is about 7, the substance is not easily ionized in water. In particular, components such as boron and silicon are not easily trapped due to the reduced adsorption capacity of the ion exchange resin. At this time, the resistivity cannot properly react with the non-ionized inorganic. The concentration of the substance. That is, even if the resistivity remained unchanged, the resin removal performance in fact been reduced, ultrapure water may be elevated to the extent that the concentration of certain ions interfering with the detection of trace element analysis. therefore. The ion exchange resin should be replaced periodically by considering the processing load of the ion exchange resin before the change in the resistivity value. Similarly, the adsorption capacity of organic matter by the activated carbon column and the air filter is also limited, and the user should replace it according to the actual water consumption. In order to extend the life of these purification columns, it is also important to use pure water with higher purity as the influent water.
In addition, various filter membranes used should be periodically replaced due to physical deterioration and pore blockage during use.
1) In the air filter to remove carbon dioxide and air pollutants planktonic microorganisms <br> <br> laboratory air containing pure water quality deterioration, using an organic solvent in the laboratory air containing a volatile organic solvent. When carbon dioxide in the air is dissolved in water, carbonate ions are formed, which greatly reduces the electrical resistivity of the pure water in the water tank, which will increase the load of the anion exchange resin in the ultrapure water system and shorten its service life. In addition, if the pure water in the water tank is mixed with microorganisms and organic substances, it will cause microbial proliferation and re-contamination of organic substances. Therefore, the pure water tank should be in a closed state, because the water tank must be provided with a vent to allow pure water to flow smoothly. Therefore, in order to prevent the pollutants in the air from entering the pure water tank through the vent buckle and the mouth, the air filter is installed. indispensable.
2) to a UV lamp for sterilization while preventing microbial propagation <br> Water purified <br> There are different ways, but still a small amount of residual microorganisms. As long as it remains in the tank, there is a possibility of breeding. Although pure water contains almost no nutrients (organic matter, etc.), there is still the possibility of adapting to microorganisms in a poorly nutritious environment. Therefore, in the process of water purification, there should be procedures related to sterilization.
The sterilizing effect of the medicinal agent and the hot water sterilization is single-time rather than continuous. In contrast, the ultraviolet irradiation sterilization method can continue the sterilization action against microorganisms during the irradiation period. The bactericidal ability of ultraviolet rays is expressed by the intensity of ultraviolet light and the irradiation time. When the microorganisms in pure water are treated with an irradiation dose of 100 mW.s/cm2, the sterilization rate can reach 99.9%. Here, we add UV lamps during the water purification process and test their bactericidal effects. First, we installed an ultraviolet lamp in the water flow line of the pure water system , and used the continuous irradiation method to detect the sterilization effect.
In general, if the ultraviolet light is not used in the water purification process, the number of bacteria in the pure water system will exceed 100 cfu/ml, and the number of bacteria in the pure water system irradiated with ultraviolet light can be reduced to 10 cfu/ml. In other words, if the UV lamp is used in the pipeline of the pure water system, it has a very good effect on reducing the number of bacteria. But after a few days, there was a phenomenon of bacterial proliferation. This is because the reproduction of bacteria in the water tank is not inhibited and the number of bacteria is gradually increased. Therefore, when controlling microorganisms in a pure water system , it is insufficient to irradiate only the ultraviolet rays in the purification process, and the bacterial growth in the water tank should be suppressed at the same time.
Therefore, as stated in the foregoing system, we used ultraviolet light irradiation treatment in pure water pipes and water tanks to detect the effect on the number of bacteria. The irradiation time of the ultraviolet lamp is 10 minutes per day. The results showed that the number of bacteria in the pure water in the pipeline was about 4-10 cfu/ml under ultraviolet light irradiation. Thereafter, the number of bacteria was further lowered under the irradiation of the tank UV lamp. After the UV lamp is irradiated in the water tank, although the number of bacteria is increased by re-injecting pure water , the bacterial growth can be greatly suppressed. From the 70 days after the start of the test, the number of bacteria in the water tank was always kept at an extremely low level, achieving an effective and sustained effect of inhibiting the growth of bacteria.
It can be seen from the foregoing results that the simultaneous use of ultraviolet lamp irradiation in the pure water line and the water tank can minimize the bacteria in the pure water . Bacterial reproduction in the water tank means that bacteria and their metabolic organic matter are transported into the ultrapure water system. Therefore, when purifying ultrapure water , it is necessary to use ultraviolet light irradiation in both the pure water line and the water tank.
In addition, the reproduction of bacteria is likely to occur where the water flow is stagnant. Therefore, the structure of the water tank is also important. The flat bottom tank completely excludes the storage of water and is called the cause of water pollution. In response to this problem, if the bottom of the tank is designed as a sloping structure so that the water can be completely eliminated, it can be solved. If the water tank is placed in the direct sunlight window, the water temperature will rise and it will easily cause the bacteria to multiply. If a water tank with a translucent material is used, algae will be propagated due to the penetration of sunlight. Therefore, these points must be taken into account when installing an ultrapure water system .
3) Â Ultrapure water system must be updated regularly supplies <br> <br> ultrapure water system since the ion exchange resin to organic matter has a certain adsorption capacity, after a certain amount of processing, it must be replaced. In particular, when the pH is about 7, the substance is not easily ionized in water. In particular, components such as boron and silicon are not easily trapped due to the reduced adsorption capacity of the ion exchange resin. At this time, the resistivity cannot properly react with the non-ionized inorganic. The concentration of the substance. That is, even if the resistivity remained unchanged, the resin removal performance in fact been reduced, ultrapure water may be elevated to the extent that the concentration of certain ions interfering with the detection of trace element analysis. therefore. The ion exchange resin should be replaced periodically by considering the processing load of the ion exchange resin before the change in the resistivity value. Similarly, the adsorption capacity of organic matter by the activated carbon column and the air filter is also limited, and the user should replace it according to the actual water consumption. In order to extend the life of these purification columns, it is also important to use pure water with higher purity as the influent water.
In addition, various filter membranes used should be periodically replaced due to physical deterioration and pore blockage during use.
Orlistat is a long-acting and potent specific gastrointestinal lipase inhibitor. It is white or off-white powder at room temperature. It is insoluble in water, soluble in chloroform, and easily soluble in ethanol. It passes through the stomach and small intestine cavity. Intragastric lipase and pancreatic lipase active codon form a covalent bond to inactivate the enzyme. Fat in food cannot be broken down into free fatty acids and monoacylglycerols, so the fat cannot be absorbed and utilized, thereby reducing the body's caloric intake and controlling body weight. This medicine does not need to be absorbed through the body to exert its effects. At the usual dose, fat absorption can be suppressed by 30%. It is rarely absorbed after oral administration and can be metabolized and inactivated in the intestine. The metabolic site is on the wall of the gastrointestinal tract, and the elimination half-life is about 14 to 19 hours. About 97% of this product is excreted with feces, of which 83% is excreted in the original form.
Orlistat can be used clinically for obesity and hyperlipidemia. Under normal circumstances, 120mg can be taken orally once a day, three times a day, and taken within one hour after a meal. After taking the medicine for 2 weeks, the weight may start to decrease. It can be taken continuously for 6 to 12 months. If the dose is increased to more than 400 mg per day, its effect will no longer be enhanced.
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