Observing microorganisms with a drop of water
The tartar could be smeared in water droplets, then fixed by brushing it over an alcohol lamp. Then, it could be dyed with crystal violet and washed away with tap water. This way, the bacteria could be cultivated and observed. However, this was only one way to observe bacteria. Microorganisms also included fungi, viruses, archaea, and protists. Observing different types of microorganisms might require different methods. For example, to observe yeast, one could put the yeast powder into a sterilized 1% glucose solution and observe it one day later. To observe black mold, one had to pay attention to its structure such as hyphaera, sporangium handle, sporangium, spores, etc. Read more exciting novels for free
How to observe the microorganisms in a drop of water
Here is how to observe the microorganisms in a drop of water: 1. Experiment preparation: Prepare the microscope, slide, cover glass, burette, blotting paper, and other experimental equipment. If there are few microorganisms in the water sample, you can use hay to cultivate microorganisms by yourself. 2. Prepare a temporary slide: use a dropper to suck a drop of water to be tested and drip it on the slide. Then gently cover the slide with a cover glass and use blotting paper to absorb excess water. If the microorganisms moved quickly, a small amount of cotton wool could be placed on the slide, and then a drop of water could be placed on the cover glass. 3. Microscope observation: After installing the microscope, perform the operation of light and focusing, and then place the slide under the microscope for observation. In addition, the change trend of microorganisms in the water can also be observed through the analysis of chemical oxygen demand (Biochemical oxygen demand). Under normal circumstances, the best thing to do in the water is to have the chemical oxygen demand (Biochemical oxygen demand) be less than 5 milligrams per liter (KmO4 method). When the microorganisms in the water multiply seriously, the chemical oxygen demand (Biochemical oxygen demand) will increase. At present, the main methods for detecting water microorganisms could be divided into two types: multitube fermentation method and the method of using an immobilized reagent. The multitube fermentation method used the corresponding culture medium in an environment of 36 degrees Celsius to perform a preliminary fermentation experiment on the collected samples, followed by plate separation and re-fermentation experiments to obtain the final results. However, these two methods were not directly used to observe microorganisms. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Water quality microorganisms and process control
Different water systems have different requirements and methods for the control of water quality microorganisms: ** I. Control of microorganisms in packaged drinking water ** 1. ** Source of Pollution ** - ** Water treatment system **: The source water contains microorganisms, which will form a biological membrane on the filter media, pipes, or tank walls. For example, a survey of 104 enterprises across the country showed that there were microorganisms such as Pseudomonads aerulosa, Clostridia perfringens, and streptococci faeces in the source water. The detection rate of charred water was higher, and there was algae pollution. The pollution of the water treatment pipeline was also serious. - ** Recoverable PC Bucket **: In the production of bottled water, the recycled PC Bucket contains dirt and a variety of microorganisms due to cross-contamination from the place of consumption, habits, and water dispenser. About 40% of the recycling barrels that had not been cleaned and disinfected were detected with P. aerulosa. Incomplete cleaning and disinfection would contaminate the products. - ** Production Equipment **: The surfaces of filling equipment, PET bottle air conveying system, conveying chain, filling machine and capping equipment, filling machine and product pipeline, etc. Due to contact and non-contact surfaces, water accumulation, etc., it may cause cross-contamination of microorganisms or the formation of biofilms. - ** environment and personnel **: The packaged drinking water production workshop is highly humid. Wooden utensils and fabric cleaning tools are prone to mold. If the production company does not implement good operating practices, the growth of microorganisms in the production environment will cross-contaminate the product. 2. ** Control Plan ** - Cleaning and disinfection was a systematic and technical work. General disinfectant suppliers lacked professional and systematic processes. Chenyu provided services such as diagnosis and research data, customized training, and standard operating procedures (50 technical standards) to control microorganisms. ** 2. Microorganism control in circulating water system (Take the open circulating water system as an example)** 1. ** Control the target ** - Control the microorganisms within a certain range, for example, the total number of bacteria is less than or equal to 105 CPU/ml. 2. ** Control Method ** - ** Control the water quality of the make-up water **: refer to the standard of water reuse, control the oxygen content, PH value, suspended matter, total phosphorus, total nitrogen, and biochemical oxygen demand in the water. - ** Side filtering method **: install a side filtering device in the circulation system to remove most microorganisms without affecting the normal operation of the cooling system. - ** Cleaning **: Use physical or chemical cleaning to remove the nutrients, growth bases, and microorganisms in the cooling system, and discharge impurities. - ** Blocking direct sunlight **: For example, adding a cover to the water dispenser of the cooling tower to control the growth and reproduction of algae. - ** Adding Fungicide **: It is divided into an oxidiser and a non-oxidiser. The oxidiser is mainly used and the non-oxidiser is supplemented. ** III. Microbiological control of circulating water quality in oil refining enterprises (from the perspective of water supply management)** 1. ** Control Requirement ** - ** Microbe-related indicators **: The number of heterotrophs is less than or equal to 1 x 105/mL; biological slime is less than or equal to 3mL/m3. - There were also the requirements for various indicators such as the pH value, turbid degree, total phosphorus concentration for corrosion inhibition, residual chorine, water supply temperature, water supply pressure, corrosion rate of test tubes, monthly average depth of corrosion of test pieces, sticking rate, concentration times, etc., and corresponding assessment measures. In summary, in different water quality environments, corresponding process control measures should be taken according to the respective sources of microorganisms to ensure the safety of water quality and compliance with relevant standards. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Training content related to the reproduction of microorganisms in water and water quality treatment
The 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. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The original text of a drop of water
A Drop of Water's original work referred to the author of the novel, A Drop of Water, who was from modern China. The novel was first published in 1925 and is one of the representative works of the author. A Drop of Water tells a profound story about human nature and social phenomena. The protagonist of the story was an ordinary person named "A Drop of Water". Although his life was ordinary, it was full of wisdom and emotional perception. Through the perspective of a drop of water, the novel shows the various ills of Chinese society and the distortion of human nature at that time, and probes into the essence and significance of human existence. "A Drop of Water" portrayed a real social reality with concise and vivid language and distinct characters, deeply reflecting the contradiction and complexity of human nature, with strong ideology and artistry. The novel was hailed as a classic of modern Chinese literature, and it was of great significance to the development and influence of Chinese literature.
An analysis of a dream in a drop of water
"A drop in the sea, a dream" may have originated from Su Shi's "Ode to the Red Cliff", which expressed the insignificance of individuals and the short dream of life in the vast universe and long history. In the song " Light,"" The final story in the Changyin Pavilion, a grain of rice in six hundred years, a dream in the sea ", combined with the background of the song, the Changyin Pavilion of the Forbidden City witnessed six hundred years of history. These six hundred years were as small as a drop in the ocean in the long river of history, as short and illusory as a dream. At the same time, it could also be used to express the emotion of personal experience, emotion or ideal pursuit in the grand background of history, which seemed insignificant but full of unique meaning. While waiting for the TV series, he could also read the exciting content related to this site!
Sulfur and water react, and a drop of water produces smoke.
The reaction between Na and water was a violent chemical reaction, which was accompanied by phenomena such as heating up, deflagration, and light, which included the production of smoke. Based on the reaction principle, the outermost layer of the Na atom only had one electron, which was easy to lose. It had strong reduction properties and was very active. When Na comes into contact with water, the reaction equation is [2Na +2H2O = 2NaOx + H2O]. During the reaction process, the block would float on the surface of the water. Because the density of the block was lower than that of water, its buoyancy was greater than its own weight. The reaction between the two gases releases heat, melting the solid Na with a melting point of only 97.72°C into liquid Na, which forms a small ball due to surface tension. The volume of the steam released from the reaction rapidly expanded at a relatively high temperature and continuously hit the air, making a "hissing" sound. The water vapor generated in this process condensed into small droplets to form the so-called "smoke". At the same time, due to the high heat released by the reaction, it also accelerated the vaporizing of water, further promoting the production of smoke. Moreover, the exposed Na sphere would react with the air to form Na Chi O and a small amount of Na Chi O Chi. The latter would quickly react with H Chi O to form O Chi, and the generated H Chi and O Chi (including the O Chi in the air) would form an explosive gas mixture at a higher temperature within its explosive limit, resulting in a more intense reaction phenomenon. It seemed that the smoke would also be more obvious. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Microorganisms are non-cellular microorganisms
Microorganisms that are non-cellular include viruses, viruses, and prions. Viruses were composed of a long chain of DNA and a protein shell. Nucleic acid was just one of the types of DNA or R A. It was parasitic on animal cells or plant cells, and its replication, replication, and translation were all completed in the host cells. Phages were viruses that were parasitic on bacteria, and their forms were tadpole-shaped, microsphere-shaped, and rod-shaped. Prions were actually infectious protein, and they were the pathogen of animal and human infectious cavernous brain diseases. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Appreciation of a Drop of Water's Works
A Drop of Water was a storyline in the second novel of the " Three-Body Problem " series," Dark Forest." The story mainly talked about the confrontation and struggle between the Earth civilization and the Three-Body Civilization, as well as the unprecedented survival crisis that mankind faced. The story was compact and exciting. It showed the grand scene of the war in the universe, but also deeply explored the theme of humanity, civilization, faith and so on. In the novel, A Drop of Water showed the fragility and short-lived nature of human civilization through his unique perspective, as well as the wisdom and firm belief of people in the face of extreme living environments. In addition, the plot of the story also had a profound enlightenment meaning, which made people think about the development direction and future prospects of human civilization, as well as the wisdom and actions that humans needed to take in the face of global problems. A Drop of Water is a very good story in the " Three-Body " series of novels. It not only shows the grand cosmic war scene, but also deeply probes into the theme of humanity, civilization, faith, etc. It has high literary value and depth of thought.
The first drop of water, novel prose
Fictions and essays are two different literary styles. The main difference between them is that novels pay more attention to the plot and character description while essays pay more attention to the author's thoughts and feelings. The first drop of water could refer to many different things and scenes, such as the first drop of water in nature, or the beginning of a story or novel. In this case, it might need to describe the source, nature, characteristics, etc. of the first drop of water and lead to the plot of the story or novel. Whether it was a novel or a prose, it needed to express the author's thoughts and emotions through a unique language and structure. Therefore, readers needed to read the works according to their own understanding and preferences, and obtain different experiences and inspirations from them.
The grace of a drop of water, reading for answers
" The Grace of a Dripping Water " was a story presented in the form of a novel. It told the story of the protagonist, Xiao Zhang, who always remembered the kindness of an old man after receiving help from him and kept repaying him in the future. Answer: After receiving the old man's help, Xiao Zhang always remembered the other party's kindness and continued to repay the other party in the future. Finally, he became good friends with the old man. This story tells us that we must always remember the kindness of others and try our best to repay the other party in order to establish a good interpersonal relationship.