Tree species have always been one of the problems in wood identification. On the occasion of the revision of the national standard of "Redwood", whether the problem that the readers are generally concerned about has been solved, this website invites Yin Yafang, the person in charge of the revision project of "Redwood" and the researcher of the Wood Industry Research Institute of the Chinese Academy of Forestry, to answer this question. .
Yin Yafang said that the DNA sequences of different plants are different. The DNA sequence of the sample is detected in the laboratory and can directly reflect the same or differences between plant species. Therefore, by using DNA barcode technology, it is possible to quickly and accurately determine which plant is obtained by comparing a standard DNA fragment in the genome of a plant species. Indeed, in recent years, the application of DNA recognition technology in the field of wood has made rapid progress, and some domestic and foreign papers on the detection of wood DNA have been published. Through different extraction techniques, we have focused on the technical bottleneck of efficient DNA extraction from dried heartwood tissue, and successfully amplified the target fragments of nuclear and plastid DNA in wood tissue, and confirmed it from the level of organelles. The main source of extracted DNA provides a theoretical basis for the feasibility of DNA barcode-based wood identification technology, and has been recognized by domestic and foreign counterparts. At present, our wood DNA identification new technology laboratory has also been initially established, and there will be some new results in succession.
Redwood species identification
Yin Yafang said that he disagreed with the statement that "the level of timber identification in China is different from the international level." It should be said that our identification technology is synchronous with the international, and even exceeds them in some aspects, such as the identification of domestic and some Southeast Asian tree species, we must definitely exceed them.
In fact, the level of international timber identification development is generally consistent. First, wood identification is a relatively traditional and classic discipline. It does not develop very rapidly like IT technology, image recognition technology and aerospace technology. Its overall development speed is not fast. Second, there is a global interoperable wood identification and coding system in the world. Through this coding system, countries with different languages ​​and different cultures can be guaranteed to be consistent in the technical basis and overall level of wood identification.
In terms of software, the international community has a professional academic organization called IAWA, the International Association of Wood Anatomists. We maintain close contact with a number of timber-related international academic organizations, including the institution, and frequently exchange, including specimen exchanges and talent exchanges.
As for the hardware, the device should not be the main problem. Compared with molecular biology, the requirements for equipment for wood identification are not very complicated, and testing equipment is not a problem. However, wood specimens of a certain scale are an indispensable foundation for wood identification work.
Reflex ball is made of solid, durable, high-density rubber and consist of a Six-hemisphere design creating dynamic and unpredictable bounce. It is great for all hard surfaces including grass, wood, asphalt, clay, even dirt.reaction balls give you the perfect analysis of your players engagement with the ball as you get immediate feedback on their reaction time. This six-sided high-bounce rubber ball leaps and pops randomly, keeping players on their toes.
Reaction Ball,Reaction Training Ball,Rubber Reaction Ball,7Cm Reaction Training Ball
Shandong Shangkun Sports Health Technology Co.,Ltd. , http://www.shangkunsports.com