First, reduce the water content. The freshly harvested seeds have higher water content and are air-dried, which can reduce the moisture content, promote seed dormancy, weaken the respiration of the seeds, and prolong the life of the seeds.
Second, increase the germination rate. Drying seeds can increase the vitality of embryos and maintain the normal germination ability of seeds. According to experiments, the germination rate of the seeds of less sun-dried seeds of the same species of maize after the autumn sun is 10% to 20% higher.
Third, kill the bacteria. When drying in the sun, ultraviolet rays can kill certain pathogens that adhere to the surface of seeds, and prevent the occurrence of insect gall, mildew, and deterioration.
Fourth, promote after-ripening. Seed maturity is divided into two stages. The first is the maturation of the seed morphology, which is called species maturation, and then the physiological maturity. When the seeds are harvested, they generally only mature in form. Such seeds have weak vitality, and the seedlings are not neat after planting. The physiologically mature seeds have strong vitality and high emergence rate.
For the treatment of diseases of the respiratory system:
Diseases and conditions of the respiratory system fall into two categories: Viruses such as influenza, bacterial pneumonia and the new enterovirus respiratory virus that has been diagnosed in children; and chronic diseases, such as asthma and chronic obstructive pulmonary disease (COPD). According to Dr. Neal Chaisson, who practices pulmonary medicine at the Cleveland Clinic, there is not much that can be done for viral infections but to let them run their course. "Antibiotics are not effective in treating viruses and the best thing to do is just rest," he said.
COPD is the intersection of three related conditions - chronic bronchitis, chronic asthma and emphysema, Chaisson told Live Science. It is a progressive disease that makes it increasingly difficult for sufferers to breath.
Asthma is a chronic inflammation of the lung airways that causes coughing, wheezing, chest tightness or shortness of breath, according to Tonya Winders, president of the Allergy & Asthma Network. These signs and symptoms may be worse when a person is exposed to their triggers, which can include air pollution, tobacco smoke, factory fumes, cleaning solvents, infections, pollens, foods, cold air, exercise, chemicals and medications.
Lung cancer is often associated with smoking, but the disease can affect non-smokers as well. Every year, about 16,000 to 24,000 Americans die of lung cancer, even though they have never smoked, according to the American Cancer Society. Like all cancers, lung cancer is caused by the uncontrolled growth of abnormal cells.
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