Tungsten heavy alloys (THAs) are a family of metallic materials that are composed of tungsten (W) as the primary constituent and one or more other elements such as nickel (Ni), iron (Fe), copper (Cu), and cobalt (Co). THAs are known for their high density, high strength, and excellent radiation shielding properties. They are used in a variety of applications, including aerospace, defense, medical, and nuclear industries. Tungsten Heavy Alloy Product,Tungsten Alloy Tube,Tungsten Tube For Oil And Gas,Tungsten Alloy Pipe For Radiation Shielding Zhuzhou Jiuding Metal Technology Co., Ltd. , https://www.zztungstenheavyalloy.com
The content of chlorophyll in the leaves is constantly changing. Take lawns as an example. In addition to the inherent phenological changes in turfgrass, artificial pruning, irrigation and fertilization also cause changes in chlorophyll content. The change trend of chlorophyll is generally like this. It is relatively low in the dry season (January to February) and the beginning of spring (March) (1.4453 to 2.8773 mg/g and 2.0931 to 2.9687 mg/g), and is completely green (April ) It was higher (2.8360-3.8400 mg/g), but it decreased rapidly after pruning (1.5277-2.8921 mg/g), and it increased after a period of time. The general trend of change between different varieties is the same.
Different turfgrass varieties have different chlorophyll content, and their greenness scores are also different. The higher the chlorophyll content, the darker the color, and the higher the greenness score, there is a good correlation between the two. After the lawn was pruned, the correlation between the two was 0.88, and the others were all above 0.90. At the same time, the chlorophyll content and the greenness had a good correlation. The correlation between the two is relatively close when the turfgrass grows normally, and the correlation coefficient decreases after pruning.
From the above results, we can also see that different leaf chlorophyll content is different, and the chlorophyll content is also different in different positions of the same leaf. The deeper the green color, the greater the chlorophyll content, so under normal circumstances, the vegetative period of plant growth, chlorophyll content It is the highest.
The density of THAs ranges from 15 to 19 g/cm3, which is two to three times higher than that of steel. This high density makes THAs ideal for applications that require weight reduction, such as aerospace and defense. THAs are also known for their high strength, which makes them suitable for use in high-stress applications such as armor-piercing projectiles and kinetic energy penetrators.
THAs are also excellent radiation shields due to their high density and atomic number. They are used in medical applications such as radiation therapy and in nuclear power plants to shield workers from radiation exposure. THAs are also used in collimators, which are devices that shape and direct beams of radiation.
Overall, tungsten heavy alloys are versatile materials that offer a unique combination of properties that make them ideal for a wide range of applications.
Chlorophyll detector and leaf genetic analysis
We all know that chlorophyll in leaves is a necessity for plant photosynthesis. How can we understand the content of chlorophyll? We can analyze the chlorophyll content in the leaves through the chlorophyll detector. However, how does the analyzer measure it? In fact, the author also consulted. A lot of relevant data, first of all we still take a look at the relationship between chlorophyll detector and genetic analysis of the leaves.