As for the nitrogen fertilizer, the ammonium fertilizer should be used for rice, and the effect is better with ammonium chloride and urea. It is also effective to apply ammonium nitride fertilizer (such as ammonium bicarbonate, ammonium sulfate, ammonium chloride, urea) or nitrate nitrogen fertilizer (such as ammonium nitrate) to cereal crops such as corn and wheat. Potato and sweet potato should also use ammonium nitrogen fertilizer. Ammonium nitrate can improve the quality of tobacco. The ammonium nitrogen helps the combustion of tobacco, while the chlorine-containing fertilizer (such as ammonium chloride) reduces the flammability of tobacco and should be avoided. For acidic soils, chemically alkaline or physiologically alkaline nitrogen fertilizers should be used. In saline-alkaline soil areas, it is not advisable to purchase ammonium chloride containing more chloride ions. In alkaline soil, ammonium nitride is easy to be absorbed and utilized by crops, but care should be taken to prevent decomposition and volatilization.
About phosphate fertilizer, legume crops (soybeans, peanuts), sugar crops (beets, sugar cane), fiber crops (cotton), potato crops (potato, sweet potato), and melons and fruit trees are in high demand. Better fertilizer efficiency. In plots with a large amount of phosphate fertilizer, it is not necessary to apply it year after year to avoid waste.
Regarding potash, tobacco, potato, sweet potato, sugar beet, watermelon, fruit tree, etc. require a large amount of potassium, but these potassium crops are bogey of chlorine, and it is not suitable to apply potassium chloride. Potassium chloride is also not suitable for long-term application on saline-alkali soil. It can be used as base fertilizer and top dressing on non-chlorinated crops, but it is not suitable for seed fertilizer. Potassium sulphate is suitable for various soils and crops, and can be used as base fertilizer, seed fertilizer, top dressing and top dressing.
Regarding sulfur and sodium fertilizers, potatoes, soybeans, peanuts, and rapeseed are also sulfur-loving crops, and the effect of using ordinary calcium is better than that of "heavy calcium." Because "heavy calcium" does not contain calcium sulfate. Beets are good sodium crops, and sodium nitrate is a good fertilizer for sugar beets. Ammonium chloride avoids chlorine crops, but it is suitable for cotton, hemp and other crops, because chlorine can increase the toughness and tension of the fiber.
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Maxillofacial fixation system -- micro-plate for cranial and maxillofacial fracture fixation, designed for the surgical treatment of maxillofacial trauma fractures, suitable for the forehead, nose, orbit, zygomatic, maxillary region, and pediatric craniofacial bones.
The system is an orthopedic surgical instrument for neurosurgical tools. The maxillofacial fixation system includes micro-plates, straight plates, L-shaped plates, T-shaped plates, Y-shaped plates, double Y-shaped plates, H-shaped plates for cranial and maxillofacial fractures. The product range is complete, covering three-dimensional titanium mesh, self-drilling rotary bone screws, anatomical orbital floor plates, orthodontic nails, etc. However, the facial anatomical structure is special, and the screw plate needs to be placed away from the fracture line and avoid important anatomical structures such as nerves and teeth roots. Therefore, the specifications of the screw plate system are required to be as diverse as possible in order to be used in different bone structures, such as different radian, length, and number of screw holes. The bone plates forcranial and maxillofacial fractures are mainly divided into 1.5mm, 2.0mm and 2.4mm systems.
Titanium (including pure titanium and titanium alloy) is the most common material for hard tissue implants. Its elastic modulus and tensile strength are higher than those of human bone, and it is better than other metal materials such as nickel-titanium alloy and cobalt-chromium alloy in terms of biocompatibility and corrosion resistance. Our maxillofacial plate is made of titanium, and the self-tapping screws are mainly made of titanium alloy.
Jaw fractures include maxillary fractures and mandibular fractures. According to whether the fracture trauma is exposed, it can be divided into open fracture and closed fracture. Trauma is the most common cause of jaw fracture, which usually includes hit, traffic injury, fall injury, firearm injury, and a few iatrogenic injuries. All are caused by external forces acting directly or indirectly on the maxillofacial region. With the popularization of motor vehicles, the proportion of jaw fractures caused by traffic accidents has increased year by year, which has become the main cause of jaw fractures. In addition, neoplastic lesions in the maxillofacial region often lead to pathological jaw fractures.
In summary, maxillofacial fixation system has been widely used in clinical maxillofacial surgery, plastic surgery and ENT, and has a relatively mature market.
Titanium Plate,Rectangular Plate,orthognathic surgery,oral and maxillofacial
Jiangsu Aomed Ortho Medical Technology Co.,Ltd , https://www.medthofixation.com