Spring is coming, and the weather is getting warmer. Many of my friends are eager to go under the cotton clothes and go light, especially our female friends. Here we would like to remind everyone that when the winter turns to spring, the temperature has just warmed up. Please do not rush to “wind†and not “temperature.†It is better to “keep†for a period of time, which is good for our health. Middle and old people and children and infants and young children should be more like this. So, what exactly should be done?
First of all, as far as adults are concerned, in the spring, we must pay attention to both ends and take good care of the head and neck. In particular, the elderly, if the temperature is still warm and cold, prematurely removed hats and scarves, vulnerable to cold invasion, resulting in colds and aggravate the symptoms of cervical spondylosis. The lower half of the human body is poorer in blood circulation than the upper half, and it is vulnerable to cold and cold. Therefore, cold is often caused by the following conditions. Therefore, it is necessary to pay attention to “thickness and thinness†in spring clothing. In early spring, some people often put on spring clothes early and wear clothes, shoes, and socks too thin. The lower blood circulation of the human body is inferior to the upper one, and it is easily affected by the cold. At this time, the coldness and moisture will quietly enter, especially the exposed knee joints, will feel soreness and discomfort, joint stiffness, etc., which will lead to arthritis.
Second, for children and infants and young children, the key is to do a good "three warm": the back warm, warm belly, warm feet. Back warm. Maintain moderate warmth on the back to help the child's body yang hair growth, can prevent diseases, reduce the chance of catching a cold; belly warm, it is best to give the child to wear a cotton apron, can prevent the abdomen due to cold caused by abdominal pain, diarrhea and other symptoms; feet warm, The subcutaneous fat layer on the foot is thin and has poor heat preservation performance. It is far from the heart and has poor blood circulation. The nerve endings on the soles of the feet are very rich and most sensitive to the cold outside. After the feet catch cold, it will pass through the nerve reflex, cause the blood vessels of the upper respiratory tract to contract, blood flow decreases, the ability to resist disease decreases, and it is easy to suffer from infectious diseases.
In the end, the “Chun Rong†must also have a degree. “悆has a bit of hot meaning. If you have crossed your head, it will also be detrimental to your health. "Spring Sorcery" is not the better the clothes are worn, but emphasizes "decrease." If the clothes are worn a lot or even “squeak†out of sweat, the cold wind blows cold and “coldâ€. In general, 15 °C is the critical temperature of the spring broom. If the temperature exceeds 15 °C, the cotton coat will be removed. Otherwise, the body's heat resistance limit will be exceeded, and the body temperature regulation center will not be able to adapt. For infants and young children in particular, excessive "spring warts" can easily cause the infants to have "overheating syndrome."
"Springtime" is the traditional way of keeping a healthy life. The principle of "Spring Sorcery" is too unobtrusive, it does not "go", and it does not become "overdone". It is very important to have a good grasp of the "Spring Sorcery" scale. The one-year plan is spring. Only by mastering the spring health regime can we lay a good foundation for the health of the new year.
Centrifugal tubes are generally disposable experimental devices and are not recommended for repeated use. In order to save money, PP centrifugal tube can be reused according to the situation, but it needs to be thoroughly disinfected by high temperature and high pressure to ensure the scientific results of the experiment. PE material centrifugal tube, can not be high temperature and high pressure disinfection.
We all know that in plastic centrifugal tubes, commonly used materials are polyethylene (PE), polycarbonate (PC), polypropylene (PP) and so on. The performance of polypropylene PP tube will be relatively good. Therefore, we should consider the plastic centrifugal tube of polypropylene as far as possible when selecting plastic centrifugal tube.
Use method of centrifugal tube:
1. Because the graduated centrifugal tube is a metering device, it must be cleaned and dried before use.
2. When reading, be sure to observe the bending liquid level correctly, otherwise it will introduce a certain error.
3. When used, the number of centrifugal tubes should be determined according to the model of the centrifuge. For example, if a centrifuge with two tubes is used for a single test, the same volume of liquid must be loaded into the other centrifugal tube to maintain balance.
4. The centrifuge tube and the centrifuge casing should be compatible. Pipe should not be too long, otherwise it is easy to break when rotating. But it is not easy to be too short, too short pipe is unstable when rotating in the air, and easy to cause breakage. Too thick sleeve not into, too thin rotation instability, round mouth should be greater than the inner diameter of the casing.
5. After the centrifugal tube is placed into the casing of the centrifuge for stratified separation, it should be stopped naturally when it stops rotating, and it should never be forced to stop by external force.
Precautions for centrifugal tube:
When we use centrifugal tube, do not use a tube many times, pay attention to the sample volatilization and some radioactive or corrosive sample leakage; In the storage process, it is necessary to seal well; It is necessary to prevent the deformation of centrifugal tube in the process of use.
Lab Consumables Plastic Centrifuge Tube,50Ml Centrifuge Tube,15Ml Centrifuge Tube,2Ml Centrifuge Tube
Changchun ZYF science and technology CO.,LTD , https://www.zyf-medical.com