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First, it is not suitable to use pesticides on vegetables 1. Organic mercury preparations such as Xi Lisheng, Sai Li San, Fu Tuolong, and Mercury. These pesticides are highly toxic to humans and animals. For example, pesticides are in contact with the skin, especially when they come into contact with the wounds or when they are sprayed from the nostrils. They are easy to accumulate in the human body and are not easily discharged, resulting in accumulation of poisoning.
2. Organic phosphorus preparations such as 1065, 3911, fly phosphorus and the like. These pesticides are highly toxic to humans and animals. They can enter the body directly through the mouth and poison people. It can also enter the human body through skin penetration and respiratory tract and cause poisoning.
3. Organochlorine preparations such as BHC and DDT are less toxic, but because of their stable nature, they are not easily decomposed in organisms and soils. Vegetables that have been given these two pesticides are often eaten. Accumulation in the body, easily lead to chronic poisoning.
In order to protect people's health and control vegetable pests, it is necessary to select pesticides with high efficiency, low toxicity and short residual period, such as trichlorfon, dichlorvos, marathon, imipenem, carbendazim, and thiophanate. At the same time, it is necessary to strictly abide by the regulations for the market to be harvested 7 to 10 days after the application of the vegetables.
Second, fertilizers that should not be applied to vegetables Some fertilizers applied to vegetables can increase the yield, but it also causes toxin pollution in vegetables, causing poisoning and even life-threatening.
For example, ammonium nitrate and other nitrate nitrogen fertilizers are generally not suitable for application to vegetables, especially cabbage, green vegetables, spinach and other leafy vegetables. Because the nitrate nitrogen fertilizer is applied to the vegetable field, the nitrate content of the vegetable is doubled. Nitrate is easily reduced to nitrite in human body. Nitrite is a kind of drug, which is extremely harmful to human body and is a carcinogen.
Fertilizers containing chlorine components such as ammonium chloride and potassium chloride are not suitable for use in crops such as tomatoes, potatoes, and sweet potatoes. Since the chlorinated fertilizer is decomposed in the soil, ammonium or potassium ions are adsorbed by the soil and absorbed by the crop. When the concentration reaches a certain level, it will be toxic to the roots of plants. It can reduce the starch and sugar content of the product, affecting the yield and quality, and seriously killing the crop.
2. Organic phosphorus preparations such as 1065, 3911, fly phosphorus and the like. These pesticides are highly toxic to humans and animals. They can enter the body directly through the mouth and poison people. It can also enter the human body through skin penetration and respiratory tract and cause poisoning.
3. Organochlorine preparations such as BHC and DDT are less toxic, but because of their stable nature, they are not easily decomposed in organisms and soils. Vegetables that have been given these two pesticides are often eaten. Accumulation in the body, easily lead to chronic poisoning.
In order to protect people's health and control vegetable pests, it is necessary to select pesticides with high efficiency, low toxicity and short residual period, such as trichlorfon, dichlorvos, marathon, imipenem, carbendazim, and thiophanate. At the same time, it is necessary to strictly abide by the regulations for the market to be harvested 7 to 10 days after the application of the vegetables.
Second, fertilizers that should not be applied to vegetables Some fertilizers applied to vegetables can increase the yield, but it also causes toxin pollution in vegetables, causing poisoning and even life-threatening.
For example, ammonium nitrate and other nitrate nitrogen fertilizers are generally not suitable for application to vegetables, especially cabbage, green vegetables, spinach and other leafy vegetables. Because the nitrate nitrogen fertilizer is applied to the vegetable field, the nitrate content of the vegetable is doubled. Nitrate is easily reduced to nitrite in human body. Nitrite is a kind of drug, which is extremely harmful to human body and is a carcinogen.
Fertilizers containing chlorine components such as ammonium chloride and potassium chloride are not suitable for use in crops such as tomatoes, potatoes, and sweet potatoes. Since the chlorinated fertilizer is decomposed in the soil, ammonium or potassium ions are adsorbed by the soil and absorbed by the crop. When the concentration reaches a certain level, it will be toxic to the roots of plants. It can reduce the starch and sugar content of the product, affecting the yield and quality, and seriously killing the crop.
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According to the adherence requirements of the product, cells are divided into three categories:
Suitable for suspension culture of common cells and tissues;
The standard type has good cell adhesion performance and is suitable for cell adhesion growth;
Dedicated containing cell pastes (cell clusters that can be used in some special cases, such as cell walls, cell surfaces and secretory cells).
According to the shape of the instrument, it is divided into:
Wide body culture flask;
triangle bottle;
Torticollis flask.
cell culture flask,filter cap cell culture flask,suspension culture flasks,cell tissue culture flask
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