Stevia sweeteners are derived from the leaves of the Stevia rebaudiana (Bertoni) plant, an herbal shrub native to South America. The stevia plant has been used for food and medicinal purposes for hundreds of years, and its leaves and crude extracts have been sold as dietary supplements. Purified extracts of the sweet substances found in the stevia leaf, called steviol glycosides, are considered to be generally recognized as safe (GRAS) by the U.S. Food and Drug Administration (FDA). However, whole stevia leaves and crude leaf extracts are not permitted to be sold as sweeteners in the U.S. because there is not enough toxicological information on these products, according to the FDA. Stevia sweeteners are made by extracting steviol glycosides from the leaves of the stevia plant and purifying them to remove some of the bitter attributes found in the crude extract. Stevia JINING USP INTERNATIONAL CO.,LTD. , https://www.uspintl.com
The walnuts are sowed in autumn, seeds can be directly sowed without any treatment, and in spring sowing, they must be treated before sowing. Due to the hard shell of the walnut, improper handling may often result in the phenomenon of mildew or low germination rate. Now introduce a new treatment method: First walnuts placed in containers, rushed into the hot water at 50 °C, soak for 24 hours, remove the sun for 2 to 3 days, and then placed in warm water for 24 hours, remove and place In the new high-fat film solution, soak for 30 minutes and remove from the sun for 4 to 5 days. At this time, the walnut began to crack, the inner kernels expanded, and the oiliness decreased. This treatment not only does not affect the seed's germination and swelling function, but also repels underground pests, prevents virus infection, increases respiratory intensity, and increases germination rate.