A female novel recommended for variety entertainment novelsThe following are some recommendations for female variety and entertainment articles: " Transformed National Goddess ", which tells the story of Gu Can, who was originally a music teacher, waking up from a high fever and becoming a fourteen-year-old high school girl, Gu Cancan. Due to family changes, she embarked on the path of an anchor and finally transformed from an anchor to a national goddess." After the couple variety show revealed their divorce ", in the story, on the night of the official announcement of the popular couple variety show " We Are Together ", Xu Wanyu, as a guest, said that she had not contacted her husband for a month and suspected that her relationship had broken down." The Top Streamer's Delicate Little Sister ". After Shen Wanwan accidentally fell into the water, the system told her that she was a cannon fodder female supporting character in the novel. She was on a racing variety show with her brother." After going to the countryside to farm, the big boss went crazy in the live broadcast room." The female protagonist Tian Ning participated in the farming variety show. She originally wanted to record the rural life, but she unexpectedly became popular because of the arrival of others." The variety show after the green tea female supporting character was abandoned exploded."
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What lens does the Nikon D3200 come with?As an entry-level DSLR model, the Nikon D3200 had the following lens combinations according to different needs:
1. ** Basic entry-level model **: You can choose the Nikon AF-S 18 - 105mm F3.5 - 5.6G ED VR. The price is about 1649 yuan. Its advantage was that it was cheap, light, and had a wide range of focal lengths, but its disadvantage was that the plastic body was less durable than an all-metal lens.
2. The Nikon 18 - 200mm f/3.5 - 5.6Ge DV RII was an option, priced at about 5999 yuan. The advantage of this lens was that it covered a wide angle of 18 to a telephoto of 200. The lens was short and easy to carry and use. The disadvantage was that the zooming was too large, which made the image quality poor, especially in the telephoto segment above 100.
3. ** Travelling model **: Can use a combination of fixed-focus lens and zoom lens, namely Nikon AF-S DV Nikkor 35mm f/1.8G and Nikon AF-S 18 - 105mm F3.5 - 5.6G ED VR. The price is about 1449 yuan + 1649 yuan respectively. This combination was ideal for shooting portraits in the environment. The 35mm f/1.8G lens had a 1.8 aperture, which was also good for indoor documentary. The disadvantage was that the image distortion effect was not outstanding.
4. ** For beginners to practice DSLR operation **: If you mainly want to meet the needs of landscape photography, portrait photography, or even macro photography, you can also choose 18 - 55 lens sets first, which is cost-effective.
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Training content related to the reproduction of microorganisms in water and water quality treatmentThe following is the training content related to the reproduction of microorganisms in water and water quality treatment:
* * I. Requirements for the reproduction of microorganisms **
1. * * Nutrient Source **
- The reproduction of microorganisms required sufficient nutrients such as carbon, nitrogen, and phosphorus. These nutrients were the basis for microorganisms to construct their own cell materials and carry out their metabolism activities. For example, organic matter such as vitamins and protein in sewage could provide nutrients such as carbon and nitrogen sources for microorganisms.
2. * * oxygen content **
- Aerobic microorganisms required sufficient dissolved oxygen. Generally speaking, dissolved oxygen should be maintained at 3 milligrams per liter, and the minimum should not be lower than 2 milligrams per liter. Moreover, shaking cultivation was usually required to ensure an adequate supply of oxygen.
- Anerobic microorganisms needed to grow in an anerobic environment, and the dissolved oxygen was required to be below 0.2 milligrams per liter.
- The oxygen requirement of faculty-type microorganisms was between the two. They could survive in an environment with dissolved oxygen ranging from 0.2 to 2.0 milligrams per liter and could be cultivated in a stationary manner.
3. * * pH-value **
- Most microorganisms adapt to a range of 4.5 - 9, but different microorganisms have differences. In the case of an aquatic biological treatment, the appropriate ph can be changed between 6.5 - 8.5, and in the case of an aquatic biological treatment, the ph should be between 6.7 - 7.4. For some microorganisms, it was more suitable to control the range of the ph between 7.0 and 9.2. If the pH-value deviated from the appropriate range, it would affect the life activities of microorganisms. For example, when the pH-value was lower than 6.5, fungi might begin to compete with bacteria. When the pH-value reached 4.5, fungi would have a complete advantage in the biochemical pool, which would seriously affect the settling results of the sludge. When the pH-value exceeded 9, the metabolism speed of microorganisms would be hindered.
4. * * Atmospheric temperature **
- In the biological treatment of waste water, the most suitable temperature range for microorganisms is generally 16 - 30 ° C, and the highest temperature is 37 - 43 ° C. When the temperature is lower than 10 ° C, the microorganisms will no longer grow. Within the appropriate temperature range, the metabolism rate of microorganisms would increase correspondingly for every 10 ° C increase in temperature, and the removal rate of chemical oxygen demand (COD-based oxygen demand) would also increase by about 10%. On the contrary, the removal rate of COD-based oxygen demand would decrease by 10% for every 10 ° C decrease in temperature. For some microorganisms, controlling the temperature to 30 - 40 ° C was more conducive to reproduction.
5. * * Light (Part of Microorganisms)**
- Microorganisms such as green algae needed to photosynthesize, and light was a necessary condition for their reproduction.
* * II. The role of microorganisms in water treatment and related principles **
1. * * The advantages and role of microorganisms in sewage treatment **
- Microorganisms mainly existed as the decomposing agents in the biosphere, and their greatest value lay in their decomposing function. There were many microorganisms that could degrade polluting substances in natural water and soil. This was also the reason why water and soil had a certain self-purification ability. In sewage treatment, an ecosystem suitable for the growth of microorganisms was artificially created. Energy transfer and material circulation were achieved through the synergy between microorganisms. Microorganisms have the advantages of strong reproductive ability, small shape, large surface area, fast and strong metabolism, wide variety of metabolism products (containing more types and quantities of degrading membranes), large population and wide distribution, strong environmental adaptability (easy to mutate after being affected by environmental factors, able to form a rapid and effective material exchange with the surrounding environment), etc. These advantages make it effective in degrading the pollution in the water.
2. * * Methods and Principles of Microbiological Waste Water Treatment **
- * * Aerobic microorganisms treatment method **: Aerobic microorganisms have strong decomposition and reproduction characteristics, which can quickly break down the complex molecular substances in the water into relatively simple small molecular substances, thus changing the water quality. Under the presence of oxygen, the autotrophs of the nitrating bacteria would vaporize the nitrogen nitrogen (NH-N) to the nitrogen nitrogen of the nitrates (NO-N). This process required the participation of oxygen and had certain requirements for environmental conditions (such as ph, temperature, dissolved oxygen concentration, etc.).
- [** Biochemical Treatment Method **: This treatment method is mainly used in high-concentration organic waste water and underwater sludge.] In an airtight environment, the bacteria would break down the organic matter in the waste water into carbon dioxide, methane, and other substances. Under the anoxic-deficient or anoxide-deficient conditions, the detoxifying bacteria used organic matter as an electron donor to reduce the nitrogen of nitrates and nitrates into nitrogen (N <2>), thereby achieving the removal of nitrogen.
- * * Microbiological facultive treatment method **: When both good and bad oxygen coexist in the same treatment process, it is facultive treatment. It was found that sometimes the co-existence of both oxygen and oxygen could make the treatment effect better.
3. * * The application of microorganisms in water treatment **
- At present, the market mainly combined a variety of microorganisms with different degrading functions with active biological membranes and nutrient salt, and after industrial production and expansion, they produced live bacteria preparations, namely, microorganisms. Microbiological agents had the advantages of strong uniqueness, high survival rate, fast adaptation to the environment, no secondary pollution, and low cost. They were now widely used in agriculture, petrification, printing and dyeing, food processing, medicine, and environmental protection, especially in water pollution control, soil restoration, and solid waste recycling.
4. * * Microorganisms in the Electro-Biochemical Waste Water Nourishment and Denitration Biochemical System Treatment Technology (example of new technology)**
- In the biochemical sewage treatment technology of the biochemical system, by applying a weak electric current, it could stimulate the metabolism activity of microorganisms and improve the decomposition efficiency of microorganisms. The effect of the electric field helped to promote the transfer and spread of substances, making it easier for microorganisms to obtain nutrients, and at the same time, it was also conducive to the discharge of metabolism products. The electric field conditions could selectively promote the growth and reproduction of certain microorganisms with specific functions, optimized the structure of the microorganisms, improved the treatment effect, and helped the transfer of electrons between microorganisms and between microorganisms and microorganisms, accelerating biochemical reactions.
* * III. Relationship between microorganisms and water quality indicators **
1. * * Biochemical oxygen demand (Biochemical oxygen demand)**
- The organic matter in the sewage consumed oxygen in both the chemical and biological processes. The more organic matter in the sewage, the more oxygen was consumed. The amount of oxygen consumed by the chemical agent for the sewage was called the chemical oxygen demand, and the amount of oxygen consumed by the microorganisms in the sewage was called the biochemical oxygen demand. The difference between the two could indicate the organic matter in the sewage that could not be biodegraded. In the sewage treatment process, because there were many detection instruments for the determination of oxygen demand and oxygen demand, the detection method was simple, and the test results could be obtained in a short period of time, so they were widely used in water quality detection and analysis. They became an important indicator for water quality monitoring and an important basis for environmental monitoring of water bodies.
2. * * Microorganism and Water Treatment Effect Assessment **
- For example, in the water treatment process of the open circulating water system, the purpose of water treatment was to always control the microorganisms within a certain range (the total number of bacteria was less than 105 CPU/ml). Through the control and detection of the number of microorganisms, the effect of water treatment could be evaluated. If the number of microorganisms exceeded this range, it might cause algae and microorganisms to grow and spread, flow into the terminal equipment, block the equipment, and affect the heat exchange effect. If it was serious, it would cause the heat exchange to be delayed, causing the equipment to be shut down and the risk of stopping production.
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