First, it mainly depends on the color. The color is brownish red. If there is a white edge, don't buy it. Look at the rings at the bottom of the cup. Soak it in water every day after you buy it, or it will crack after a few days without using it.
"Red": Red is an illusion, because yew itself is red, and it is even redder when entering the water. When you pour water into other utensils, you will find that the water turns pale yellow, and the longer it takes, the redder it becomes.
Second, the handle of the cup: "heavy", yew is heavier than ordinary wood. The weight ratio is twice that of ordinary wooden cups.
Third, smell: "smelly", the taste is a bit sour.
Extended data
Taxus chinensis var. mairei was a rare and endangered plant during the Quaternary Glacier Period. Taxus China is a unique tree species in China, distributed in southern Gansu, southwestern Shaanxi, western Hubei, Sichuan and other places. In Central China, it is mostly found in undisturbed environment in the upper part of mountains above 1 1,000 meters. In deciduous broad-leaved forests in mountains above 1 1,500 ~ 3,000 meters in South China and Southwest China, it is relatively concentrated in Hengduan Mountain and the surrounding mountains of Sichuan Basin, and also distributed in northern Guangxi, eastern Guizhou and southern Hunan. It is listed as a national key protected plant.
morphological character
Evergreen tree, 30m high, trunk diameter1m. The leaves are spiral and the base is twisted into two rows of strips. Slightly curved, length1~ 2.5cm, width 2 ~ 2.5mm, slightly curved leaf margin, tapering leaf tip, two wide yellow-green or gray-green stomata on the back of the leaf, densely covered with tiny protrusions on the midvein, and extremely kiln at the leaf margin. Dioecious, male cones are solitary in leaf axils; The ovule of the female cone is solitary at the top of the lateral short axis in the upper part of floral axis, and there is a disc-shaped aril at the base. Seeds oblate, 2-angled, umbilical ovoid, with red cup-shaped aril. The maturity date is from September to165438+1October.
growing environment
Sex grows in warm and rainy places and is a typical negative tree species. Trees are often located in the second and third floors under the forest canopy, which are relatively scattered, and there is basically no pure forest, and there are few clusters. It only grows well on well-drained acid gray-brown soil, yellow soil and yellow-brown soil, and the seedlings are shaded to avoid sun exposure.
distribution range
There are 1 1 species of yew in the world, which are distributed in temperate to tropical regions of the northern hemisphere. There are four varieties in China 1, namely, China Taxus, Northeast Taxus, Yunnan Taxus, Tibet Taxus and Southern Taxus (varieties). Taxus media was introduced from Canada in the mid-1990s and cultivated in Sichuan, Guangxi, Lingui and Shandong.
cultivation techniques
Its seed coat is thick and in a deep dormancy state. In the natural state, it can germinate only in two winters and one summer, and the natural regeneration ability is weak. Reproduce with seeds. Embryo has a long dormancy period, so it must be stored in wet sand layer at low temperature after seed collection, and sown in spring, and the germination period can be extended to the next year. It can also be propagated by cutting.
Main value
Taxus chinensis, a national treasure, is a rare and endangered species left over from the Quaternary Ice Age 2.5 million years ago, and it is a living fossil in plants. From 65438 to 0994, Taxus chinensis was designated as a first-class protected plant in China, and 42 countries in the world called it a "national treasure" and a veritable "plant giant panda".
Taxus chinensis, a CAM plant, inhales carbon dioxide and exhales oxygen 24 hours a day. Compared with other plants, its biggest advantage is that it is suitable for indoor display and has the function of increasing oxygen.
Auspicious tree. Taxus can be over 5000 years old, so it is called "longevity tree". Its red fruit is covered with branches, crystal clear, meaning auspicious and festive, so it is also called "auspicious tree".
The golden tree yew is a treasure. Its wood is high-quality mahogany, which can be used as high-grade furniture, fruit can be used as health care products, roots can be used as handicrafts, and bark and fine roots are the best raw materials for extracting paclitaxel, so it is also called "Huang Jinshu".
Taxus chinensis is an excellent potted foliage plant with tolerance to shade and temperature. It likes humidity, avoids sunlight, needs little watering and is well maintained. It still grows well when the temperature is as high as 4 1 celsius, and grows slightly at MINUS 6 celsius, with evergreen seasons and beautiful appearance. It is a suitable evergreen plant in the north and south.
Taxus chinensis var. mairei volatilizes its own odor molecule citronellal through photosynthesis, and citronellal has mosquito repellent effect. The higher the temperature, the more aromatic molecules it exerts, and the better the mosquito repellent effect. This fresh and elegant, hot summer is refreshing. According to authoritative testing, this fragrance is harmless to people and animals and can repel hundreds of mosquitoes.
Ornamental value
China Taxus var. China has a beautiful tree shape and evergreen seasons. The color matching of red and green is intoxicating when the fruit is ripe. Can be widely used in soil and water conservation, landscaping and other aspects. It is an excellent tree species to improve the ecological environment and build beautiful mountains and rivers in the new century, and is now commonly used in high-grade courtyard greening for viewing.
Scientific research value
Taxus chinensis in China is a rare and endangered plant in the world left over from the 4th century glaciers, with little natural distribution in the world. It is listed as a national first-class protected plant and has high scientific research value in many aspects.
Medicinal value
Taxol and its derivatives extracted from Taxus plants in China are one of the best anticancer drugs in the world at present, and have high development and utilization value.
Taxol is extracted from Taxus cuspidata 197 1. Due to the unique anti-cancer mechanism of PACLI TAXEL, Dr. BRODER, director of the National Cancer Institute of the United States, said that paclitaxel is considered to be a new anti-cancer drug with good curative effect and less side effects on many cancers in recent 15 years after adriamycin and cisplatin. Since 1980s, the United States, Britain, Russia, South Korea and China have conducted in-depth research.
The US Food and Drug Administration (FDA) approved its clinical use on 1992. The United States took the lead in applying the research results to medical clinic and achieved remarkable clinical results in the treatment of various cancers. It has been proved to be effective for many cancers, especially for ovarian cancer and breast cancer, with a cure rate of 33% and an effective rate of 75%. Paclitaxel has become the best drug to treat cancer in the world. Since then, mankind has made new breakthroughs in the field of anti-cancer. So far and for a long time to come, the most favorable weapon for human beings to fight cancer can only be paclitaxel. The annual output of paclitaxel in the world is only about 250kg, and the market supply and demand are unbalanced, and the price is very expensive, reaching more than 200,000 US dollars per kg. Therefore, yew is known as "plant gold".
Taxol is mainly extracted from the roots, skins, stems and leaves of Taxus chinensis. Due to the complex extraction process, especially the difficulty in removing chlorophyll from the stock solution, the large equipment investment, especially the lack of raw materials, the conventional extraction of paclitaxel developed late in China and just started in the 1990s. Due to the slow growth rate and poor regeneration ability of Taxus chinensis under natural conditions, a large-scale raw material forest base of Taxus chinensis has not been formed in the world for a long time.
Anti-cancer Taxus chinensis can not only absorb toxic substances such as carbon monoxide and sulfur dioxide, but also absorb carcinogens such as formaldehyde, benzene, toluene and xylene, which can purify the air and play a role in preventing cancer.
Anti-cancer Taxus chinensis is the only tree species in the world that can extract paclitaxel, which is internationally recognized as a good medicine for treating cancer with broad spectrum, low toxicity and high efficiency.
use value
China yew is a precious timber tree species with excellent wood, bright red color, tenacity and durability. It is often used for carving and making high-grade furniture, handicrafts and so on. Wood is corrosion-resistant and can be used in civil engineering; The oil content of seeds reaches 60%, which has special development value.
Source: Baidu Encyclopedia: Taxus chinensis