"Tiangong Kaiwu" says: "Where ramie has no soil and no growth. It is planted by two methods: sprinkling and splitting." Ramie, as a traditional textile raw material, has unique physical properties.
Ramie fibers are slender and tough, with a length of generally 60 to 250 mm. Compared with other common natural fibers, the length advantage is significant. Its strength is large, and the single fiber strength can reach 35 to 45 grams, which makes the ramie fabric strong and durable, and can withstand large external forces to pull without easy damage. At the same time, the elongation of ramie fibers is small. During the stretching process, the elongation rate is only 2% to 4%. The fabric has good dimensional stability and is not easy to deform and out of shape during washing or wearing.
Ramie fibers have good moisture absorption and moisture discharge. In a humid environment, it can quickly absorb and emit moisture, making people feel dry and comfortable when wearing, even in hot weather, it can keep the body surface dry and reduce discomfort. And ramie fiber dissipates heat quickly, and it can bring a cool feeling when it touches the skin. Wearing ramie fabric on a hot summer day makes you feel cool and pleasant.
Furthermore, ramie fiber has natural antibacterial and antibacterial properties. Because it contains special ingredients, it can inhibit the growth of bacteria. After many washes, the antibacterial properties of ramie fabric can still be maintained, effectively reducing the odor caused by bacteria and ensuring hygiene and health.
Ramie fiber also has good corrosion resistance. It has a certain resistance to general chemical substances and is relatively difficult to be eroded in chemical environments such as acid and alkali, which further enhances the durability and service life of ramie fabrics, enabling them to be used for a long time in different environments.

"Tiangong Kaiwu" has a saying: Ramie is the top grade of hemp. Its cold nature has the power of clearing away heat. The fiber of ramie is slender and tough, strong and elastic, resistant to corrosion and water, which is the best of its physical properties.
In terms of chemical properties, ramie is rich in cellulose, which is its main component. The structure of cellulose is stable, making it difficult for ramie to react with common chemicals in general environments. In case of weak acid, ramie can maintain its basic form. Only when strong acid and high temperature, long-term action, the structure of cellulose is damaged, resulting in changes in the properties of ramie.
When it comes to alkali, ramie changes little in a short time in dilute alkali solution. However, if the alkali concentration is high and the action time is long, the cellulose will swell, which will affect the performance of ramie. This property allows ramie to adjust its properties according to demand in some alkali treatment processes.
Ramie contains a small amount of hemicellulose and lignin. Hemicellulose can be hydrolyzed into sugars under specific conditions, and lignin has an impact on the color and corrosion resistance of ramie. Appropriate removal of lignin can improve the whiteness and softness of ramie, and the presence of lignin also increases the corrosion resistance of ramie, making it more durable in the natural environment.
In addition, in the microbial environment, ramie contains ingredients that can provide nutrients for some microorganisms, so it may be eroded by microorganisms if it is hot and humid for a long time. However, with proper treatment, such as adding preservatives or changing the storage environment, this process can be delayed and the quality of ramie can be maintained.

In "Tiangong Kaiwu", it is said that the thick stems are collected, the skin is removed and the meat is wrapped, and the food is cooked, and the taste is like lily. Its roots are like three edges, and it is cooked, and the taste is like taro. Gorgon is the seed of thickening, and its main use is quite extensive.
First, it can be eaten. After cooking, Gorgon has a soft and waxy taste and a unique taste, which adds color to the diet. And it can be matched with many ingredients. In porridge and soup, it not only enriches the taste, but also increases nutrition. For example, Gorgon is cooked with glutinous rice and red dates as porridge, which is waxy and nourishing, and is a good health product.
Second, it has medicinal value. Traditional Chinese medicine regards it as sweet, astringent, flat in nature, and returns to the spleen It has the effect of nourishing the kidney and fixing sperm, nourishing the spleen and preventing diarrhea, and dehumidifying and stopping the belt. It can be used to treat the slippery sperm of wet dream, frequent enuresis and urination, chronic diarrhea of the spleen deficiency, white turbidity, and hypodermis. Among many classic prescriptions, its body shadow can often be seen to help patients recover health.
Third, it has a significant effect in the field of diet and health care. Because it is rich in starch, protein, fat, carbohydrates, crude fiber, calcium, phosphorus, iron and other nutrients, long-term and moderate consumption helps to enhance physical fitness, improve immunity, and achieve the purpose of health care.
Therefore, Gorgon is of important value in diet, medicine and health care, worthy of the gift of nature.

2-Jiang-1-Question-4-Steroidal nucleosides are synthesized in a variety of ways. The following is a brief description for you:
First, chemical synthesis. This is a classic method. The construction of steroidal nucleosides is achieved by carefully designing reaction routes and using various organic chemical reactions. For example, the steroidal parent nucleus can be modified first, a specific active group can be introduced, and then the nucleoside part can be connected to the steroidal parent nucleus by means of nucleophilic substitution, condensation and other reactions. Specifically, a steroidal compound with a suitable substituent is used as the starting material, and a halogen atom is introduced at a specific position in the steroidal parent nucleus through halogenation reaction, and then a nucleophilic reagent containing nucleoside structure reacts with it to realize the connection between the two. The advantage of this method is that the molecular structure can be precisely designed according to the needs. However, the reaction steps are often complicated, the conditions are harsh, and a variety of organic solvents and reagents are required, which is easy to affect the environment.
Second, biosynthesis. Use enzymes or microorganisms in vivo to synthesize steroidal nucleosides. There are many specific enzymes in vivo that can catalyze specific chemical reactions. Enzymes with relevant catalytic activities can be screened or modified to act on suitable substrates, and then steroidal nucleosides can be synthesized. For example, some microorganisms can convert the added steroidal substrates and nucleoside precursors into steroidal nucleosides under specific culture conditions. This method has the advantages of mild reaction conditions, high selectivity, green environmental protection, but the biological system is complex, the control requirements for reaction conditions are extremely high, and the yield is usually low, which poses challenges for large-scale production.
Third, semi-synthetic method. Combining the strengths of chemical synthesis and biosynthesis, the basic structure of the steroid or nucleoside is first obtained through biosynthesis or natural extraction, and then further modified and linked by chemical methods. For example, the steroid parent nucleus is extracted from natural products, and the nucleoside analogs are prepared by biological fermentation method, and then the two are connected by chemical means. This method not only plays to the advantages of biosynthesis, but also uses chemical synthesis to precisely regulate the structure, which makes up for the shortcomings of the two to a certain extent. It is a potential synthesis strategy.

Poria cocos is a good product in medicine. During storage and transportation, many matters need to be carefully paid attention to.
When storing, the first environment is dry. If it is in a humid place, Poria cocos are highly susceptible to moisture and mildew, resulting in a great reduction in their efficacy. It is necessary to choose a well-ventilated, dry and refreshing place to prevent moisture from invading it. If placed in a urn, supplemented by a desiccant such as lime, it can be kept dry.
Furthermore, insect prevention is also a priority. Poria cocos have a unique smell and are prone to insect moths. It can be stored and disposed of prickly ash, asarum, etc., by its smell to repel insects; or it should be checked frequently. If there are traces of insect moths, it should be treated quickly without delay.
As for transportation, the packaging must be sturdy Wrap it in thick cloth or in a wooden box, so that the Poria will not be collided and squeezed on the way, so that it will not break. And during transportation, it should also avoid humidity and high temperature. The summer heat should not be exposed to the scorching sun to prevent its texture from mutating; when it rains, it should be properly covered and not let the rain rain rain.
Also, when handling, it is important to handle it with care. Although the Poria is firm in texture, it is easy to break if it is too much to touch. When people move, they should know their interests and operate with caution, so that they can keep the Poria in storage and transportation, with no loss in quality and no loss in efficacy, for doctors to use and cure various diseases.