People often think that plants are "longing for" sunlight, but too much light produces free radicals that are potentially lethal. Now researchers have finally figured out the plant's self-protection mechanism. This discovery will help scientists develop transgenic crops adapted to different lighting conditions. Plants take energy from the sun with the help of chlorophyll and carotenoids, two molecules that can "capture" photons. However, if the plants are exposed to sunlight for too long, the energy absorbed by these molecules will exceed the range that they can convert, resulting in some oxygen-containing active particles that can damage the health of the plant. Researchers have known for more than 20 years ago that plants have a set of methods to protect themselves from harm, but what exactly is a mechanism has been an unsolved mystery. According to a study published in the latest issue of the journal Science, this mechanism has helped plants open a unique "safety valve." Using a number of experimental instruments capable of recording chemical reactions lasting only 1 femtosecond, a working group of researchers from the University of California, Berkeley, and the Lawrence Berkeley National Laboratory tracked the absorption of solar energy by spinach leaves and Arabadopsis. . The researchers found that excessive light induced the production of zeaxanthin, a member of the carotenoid family. This molecule transfers an electron to chlorophyll, making it unable to produce active oxygen-containing free radicals. The positively charged zeaxanthin ultimately combines with the negatively charged chlorophyll through a reaction and dissipates excess energy in the form of heat. Graham Fleming, a biochemist working at the University of California at Berkeley and the Lawrence Berkeley National Laboratory, who is a member of the research team, pointed out that zeaxanthin is very sensitive to self-defense, and it even turns itself off when the clouds pass overhead. shut down. Gary Brudvig, a biophysical chemist at Yale University, believes that this new paper is a very important research result. It provides us with first-hand proof of the plant's self-protection mechanism. Robert Blankenship, a biochemist at Arizona State University, emphasized that this discovery will help scientists develop artificial photosynthesis systems that can effectively use solar energy, as well as high-yielding GM crops that can adapt to different lighting conditions.
Single use. Avoid cross infections in the surgery. Form the electric circuits with electrosurgical
pencil for surgical cut and coagulation of high frequency. Excel in conducting electricity,
safer in operation. A complete range of specifications are available.
Introduction
Disposable patient plate for use with a radio-frequency ablation system generator, complete the electrical circuit between the patient and the electrosurgical generator.
The large size provides optimal safety for your patient.
Grounding Pad,Earthing Bed Pads,Grounding Pad For Bed,Grounding Mattress Pad
Zhejiang Haisheng Medical Device Co., Ltd , https://www.hisernmedical.com