Constant Power Emergency Driver
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The yew, also known as the yew tree, is a fascinating plant with shallow roots and well-developed lateral roots. It is considered one of the rarest and most valuable anti-cancer plants globally. This ancient species has survived for over 2.5 million years since the last ice age, making it a living relic from the Quaternary period. Due to its slow growth and limited ability to regenerate naturally, large-scale cultivation of yew has been challenging, resulting in limited availability of raw materials for medicinal use.
Since the discovery of Taxus extract—commonly known as paclitaxel (also referred to as Taxol, Pacilitaxel, or Taxel)—scientists have recognized its unique mechanism in fighting cancer. Dr. Broder, former director of the National Cancer Institute, once called paclitaxel a groundbreaking anticancer drug, effective against multiple types of cancer with fewer side effects compared to traditional treatments like doxorubicin and cisplatin. Since the 1980s, countries such as the United States, Britain, Russia, South Korea, and China have conducted extensive research on this compound. The U.S. was among the first to apply these findings in clinical settings, achieving remarkable results in treating various cancers. This breakthrough marked a significant advancement in oncology, and paclitaxel remains one of the most important tools in the fight against cancer today.
**Ecological Habits of Yew:**
The yew is adaptable and can be grown across different regions, both north and south. It thrives in shaded environments, tolerates drought, and is resistant to cold. It prefers soils with a pH between 5.5 and 7.0 and can be interplanted with other trees or crops, making it easy to manage. The Northeast yew, in particular, is an ancient species that survived the last glacial period. Its resilience has allowed it to thrive for millions of years, even in harsh climates. It develops strong lateral roots, has dense foliage, and is highly adaptable to different environmental conditions. It is also resistant to pruning, cold, and pests, and some specimens can live for thousands of years. In folklore, the Northeast yew is often called the "Fengshui God Tree" due to its symbolic and spiritual significance.
**Morphological Characteristics:**
The yew is an evergreen tree that can grow up to 30 meters tall with a trunk diameter of around 1 meter. Its leaves are spirally arranged, twisted at the base into two rows, and slightly curved. They measure between 1 to 2.5 cm in length and 2 to 2.5 mm in width. The leaf edges are slightly curled, and the tips are tapered. On the back of the leaves, there are two wide yellow-green or gray-green stomata zones, with small bumps along the midrib and narrow green margins. The yew is a monoecious plant, meaning male and female flowers occur on separate individuals. Male flowers are globular and appear in the leaf axils, while female flowers produce ovules at the top of the upper branches. The seeds are obovate, with two ridges and a fleshy aril, which turns red when mature.
In recent years, the yew has gained popularity not only for its medicinal value but also for its aesthetic appeal. It is widely recognized as a powerful anti-cancer agent and is protected at the national level. The red seeds of the yew resemble beans and are often associated with love and longing, similar to the Acacia beans of the South. Hence, the tree is named "yew" due to its bean-like appearance. Beyond its medicinal uses, the yew also has traditional applications in treating kidney diseases, diabetes, nephritis, urinary issues, and gonorrhea. It is also used in gynecology to regulate menstrual cycles, relieve postpartum blood stasis, and alleviate dysmenorrhea.