GM cotton can also be environmentally friendly

One of the reasons for the fierce controversy over the past of genetically modified crops and food is that such crops may cause irreversible damage to the environment and ecology. Those who oppose this kind of biotechnology believe that such GM crops can resist pests and diseases and reduce the use of pesticides, but pests will quickly become tolerant to the toxicity of genetically modified crops and cause greater harm to the environment and ecology. However, any prediction requires research to prove it. Recent studies have shown that after 10 years of genetically engineering transgenic cotton that has been transferred to the soil of Bacillus thuringiensis (Bt) toxin, it can also maintain effective toxicity against pests. For example, in the south of the United States, a large number of transgenic cottons that have been transferred to toxins have been planted, and local genetically modified cotton can effectively kill major cotton pests in the past 10 years. This shows that genetically modified crops will not allow pests to develop resistance in a short period of time. Receptive. This result to some extent negates the prediction that pests will quickly develop tolerance to Bt toxin in transgenic cotton. In 1996, the United States began planting a large number of genetically engineered genetically modified cotton. This type of cotton was transferred to Bt toxins, mainly to deal with cotton pests and other pests. At the time, many experts predicted that in a few years, pests would evolve resistance to Bt toxins. But in fact it is not the case. Of course, some researchers have also raised questions about whether GM cotton insecticides are indeed effective. Despite this, the people who conducted the study believe that it may take five years for the GM cotton to make the pests more tolerant. So why did GM cotton not tolerate insect pests? The researchers found through field surveys and mathematical models that this was a scientific defense and planting method for GM crops. The United States Department of Agriculture requires that at least 5% of non-Bt genetically modified cotton is planted on farmland where Bt genetically modified cotton is grown as a protected area. These insects are mixed with the insects in the transgenic crop area to easily dilute the density of insect tolerance genes. Despite this, researchers are still worried that tolerability will one day become a problem. Therefore, it is not possible to rely solely on planting methods to prevent the insects from developing tolerance. Rational design of genetically modified crops is another important method for delaying the development of insect tolerance and protecting the environment. The new approach is to allow the second-generation Bt transgenic crops to carry another bacterial gene to produce two toxins, which can delay the development of insect tolerance to Bt transgenic cotton. At present, Bt transgenic cotton is planted in large areas in many countries such as South Africa, Australia, the United States, and China. Therefore, the key is not whether we can plant genetically modified crops, but whether we can anticipate the environmental, ecological, and human hazards of GM crops in advance and make reasonable and scientific precautions.

Franctional Co2 Laser for scar removal(Co2 Laser Machine)

Treatment Principle

This product is due to small size,light weight ,easy to carry,suitable for mobile protable treatment, Co2 laser divergence angel small, good direction,high energy density through focused ,up to several kilowatts per square cemtimeter of power. Medical can be used to vaporize tissue lessions, burning or cutting tissue lesions, so the co2 laser treatment, also known as laser knife. The focus of original beam irradiation without tumor tissue, can produce coagulation , Co2 laser is the wavelength of 10.6nm infrared light penetrates tissue deeper. After irradiation by the beam expander can be therapy for deep tissue heating. Co2 laser desktop swithching power supply technology with advanced. Non-polar power conditioning circuit. Power adjustable,antomatic overcurrent protection devices. This machine have continuous and pulse thergy. Pulse width adjustable, adjustable frequency , a wide range of operation, adaptability, easy to operate, easy to carry, suitable for surgey. Dermatdogy. ENT plastic surgey.

Application Ranges

1.Skin renewing and resurfacing
2.Skin tightening
3.Acne and acne scar removal
4.Smooth burnt scars and surgery scars, dermabrasion
5.Remove intractable chloasmas and pigmentation

Technology Characters

1.USA radio frequency laser
2.Individual design of laser structure, greatly facility laser replacement and easy daily maintenance
3.Display: 10.4\" color touch LCD screen
4.Humanized software control, stable laser output,more safe
5.Smart articular arm, high accuracy

6.Excellent performance, not affect people\'s normal life and study

Franctional Co2 Laser

Professional Laser Co2 Skin Rejuvenation Machine, Fractional Laser Co2 Equipment,Co2 Laser Machine

Zhejiang Lasy Science and Technology Co.,Ltd. , http://www.lasylaseripl.com