The seeds of cruciferous vegetables are either pressed with nails or placed on a tabletop. When rubbed with the palm of the hand back and forth, they tend to stick together, making them hard to remove. These seeds are usually greenish-yellow or light yellow in color. New varieties often have a distinct texture, while older ones (Chen seeds) appear duller, sometimes showing a "salt cream" layer on the surface that peels off easily. They may emit a slight oily odor, have low oil content, and feel heavy when pressed. Their cotyledons crumble easily, and the granules separate with little resistance.
Solanaceous vegetable seeds, such as those from eggplants, peppers, and tomatoes, are typically milky-yellow and glossy. New varieties may show a khaki or lighter yellow hue. A new type of pepper tends to be spicier, while Chen seeds have a milder flavor, sometimes even a musty smell.
Legume seeds like green beans, kidney beans, and peas generally have a shiny, full appearance and are rich in oil, with a fragrant aroma and a slightly astringent taste. The cotyledons are green, and the new seeds have a crisp bite. In contrast, Chen seeds lack astringency, have no strong smell, and their cotyledons may display deep yellow markings. Additionally, new legume seeds are free from wormholes, which is a key indicator of freshness.
For onion and leek seeds from the Liliaceae family, when wetted with saliva and carefully observed, new seeds will show a small white core on the surface. If there's no white core, it's likely an older (Chen) variety.
Cucurbitaceae seeds, such as those from cucumbers and bitter gourds, have a shiny, creamy exterior and are rich in oil, with an astringent taste and a pleasant aroma. Older seeds, however, tend to be dull, sometimes marked with spots, and may have an oily or greasy texture when chewed.
Carrot and leek seeds are generally harder to germinate and may not survive well even if they do. Onions, in particular, require the use of fresh seeds. Spring onions grown from Chen seeds tend to produce poor yields and lower quality. Therefore, farmers should conduct a germination test before planting to determine the appropriate seeding rate based on the seed viability. This ensures better crop performance and maximizes yield potential.
for the led waist heating belt, it uses 650nm+850nm wavelength combination. 650nm+850nm pain relief belt is a belt product with specific functions. It may use the physical therapy principle of red light or infrared to help relieve pain.
Such belts usually have the following characteristics and possible effects:
• Pain relief: Through the irradiation of light with a specific wavelength, it may help to accelerate local blood circulation and relieve pain and inflammation in the waist or other parts.
• Promote recovery: It may help muscle recovery and improve muscle elasticity.
• Easy to use: Generally small and light, rechargeable and portable, easy to carry, and can be used for physical therapy anytime and anywhere.

For Suyzeko portable red infrared light therapy belt:
About our portable red light infrared belt, it was developed and put on the market in 2015. Compared with ordinary LED waist heating belt, it has the following characteristics:
1. We use silicone material as the surface, compared with pvc material, our red light belt surface is softer and skin-friendly, it will not produce creases, wear-resistant and not easy to break. Whether you use it yourself or for your pet, it can fit perfectly and is easy to clean. You can clean it with a wet rag because it has waterproof properties.
2. We designed a frequency pulse light mode of 147hz 294hz 587hz 1174hz 4625hz cycle, and the treatment will stop automatically after 30 minutes. Compared with ordinary continuous wave treatment, it is more powerful.
3. We use oily circuit board, which can be folded 360 degrees. It can be used for pain therapy in various parts of the body, whether it is waist strain pain caused by long-term sitting in the office; stiff shoulder and neck fatigue; or arm, knee and other injuries caused by exercise, you can use the straps we give you to fix the red light pad to the part you need to treat.
4. We are equipped with a USB connection cable, which can be a good partner for your travel. You can use a mobile power supply to treat anytime and anywhere.
850nm and 660nm waves. These have been proven to: stimulate acupuncture points, increase blood circulation and help with antioxidant enzyme release. Phototherapy in this spectrum also promotes muscle relaxation and generally facilitates pain reduction, stimulates fibroblast and collagen production, increases lymphatic drainage, and reduces swelling, inflammation and bruising- bringing relief to athletes, sufferers of arthritis, and those with chronic pain.
The energy can flow through the body and interact with damaged cells in many parts of the body operating more like a vitamin that goes where it needs to go. This wavelength is also best for treating the lymph system and acupuncture points. Whereas studies show near-infrared wavelengths in the 850 nm penetrate deeper through skin and bone for relief of chronic pain.
As with red light therapy, near infrared light therapy does not mask the symptoms of pain, it encourages the healing of the actual cause of the pain. Once absorbed, the light energy kicks off a whole series of metabolic events, stimulating the body`s natural processes on a cellular level. There is an increase in blood flow, allowing the parts of the body to receive the oxygen and nutrients they need in order to function more effectively. Regeneration is stimulated. Inflammation and pain are reduced.
The energy can flow through the body and interact with damaged cells in many parts of the body operating more like a vitamin that goes where it needs to go. This wavelength is also best for treating the lymph system and acupuncture points. Whereas studies show near-infrared wavelengths in the 850 nm penetrate deeper through skin and bone for relief of chronic pain.
As with red light therapy, near infrared light therapy does not mask the symptoms of pain, it encourages the healing of the actual cause of the pain. Once absorbed, the light energy kicks off a whole series of metabolic events, stimulating the body`s natural processes on a cellular level. There is an increase in blood flow, allowing the parts of the body to receive the oxygen and nutrients they need in order to function more effectively. Regeneration is stimulated. Inflammation and pain are reduced.
In many cases, after a course of treatment with red infrared light, the pain is gone.

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Shenzhen Suyzeko Limited. , https://www.nirlighttherapy.com