A laboratory overhead stirrer is a device used in chemistry and biology laboratories to mix and stir liquids. It consists of a motor that drives a rotating shaft with a stirring blade or paddle attached to the end. The motor is mounted on a stand that is suspended from the ceiling, hence the name "overhead stirrer". The stirring speed can be adjusted by the user, and the device can be programmed to run for a set period of time. Overhead stirrers are commonly used in chemical synthesis, cell culture, and microbiology applications. They are particularly useful for mixing viscous liquids, suspensions, and emulsions, and for maintaining a consistent mixing speed over long periods of time. Overhead Stirrer,Laboratory Electric Stirrer,Laboratory Digital Agitator,Laboratory Overhead Stirrer Lachoi Scientific Instrument (Shaoxing) Co., Ltd. , https://www.lachoinst.com
Six key points to avoid buying fake pesticides
Pesticides are essential for crop protection, but the market is flooded with fake and substandard products that can harm farmers' interests. Using counterfeit pesticides not only fails to deliver the desired results but can also damage crops, reduce yields, and even lead to total loss in some cases. Therefore, it's crucial for farmers to be able to identify genuine pesticides when making a purchase.
So, how can you ensure that you're buying authentic pesticides? The China Pesticide Network has compiled six key tips to help you make informed decisions:
**1. Check the manufacturer and contact information:**
Reputable manufacturers usually provide detailed information on their product labels, including the company name, address, postal code, and phone number. If a product lacks this information, it may be an illegal or fake item, and should be avoided.
**2. Verify the three certificates:**
The "three cards" refer to the pesticide registration certificate, product standard certificate, and production license. These documents are mandatory for domestic pesticides. For imported products, there may be four certificates, including the packaging registration certificate, sub-assembly approval certificate, and implementation standard number. Always check these to confirm authenticity.
**3. Examine the active ingredients:**
Before purchasing, make sure you understand the active ingredients of the pesticide. Don’t be misled by catchy names. You can check the official pesticide registration notice from the testing institute to confirm what the product contains and its intended use.
**4. Pay attention to content and size:**
Some unscrupulous manufacturers reduce the concentration of active ingredients or use smaller packaging to lower costs. Be cautious if the product seems unusually cheap or has a different size than usual.
**5. Evaluate the packaging quality and price:**
Counterfeit pesticides often come in poor-quality packaging. Also, if the price is significantly lower than similar products, it could be a sign of a fake. Always compare prices carefully and look for signs of quality.
**6. Check the shelf life:**
Always check the expiration date before buying. Pesticides lose effectiveness over time, so only purchase those that have a reasonable shelf life remaining.
By following these simple steps, farmers can protect themselves from fake pesticides and ensure they are using safe, effective products for their crops. Stay informed, stay cautious, and always choose quality over price.